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1 /* Text manipulation primitives for XEmacs.
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2 Copyright (C) 1995 Sun Microsystems, Inc.
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3 Copyright (C) 1995, 1996, 2000, 2001, 2002, 2003, 2004 Ben Wing.
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4 Copyright (C) 1999 Martin Buchholz.
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5
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6 This file is part of XEmacs.
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7
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8 XEmacs is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 2, or (at your option) any
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11 later version.
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12
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13 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with XEmacs; see the file COPYING. If not, write to
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20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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21 Boston, MA 02111-1307, USA. */
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22
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23 /* Synched up with: Not in FSF. */
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24
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25 /* Authorship:
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26 */
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27
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28 #include <config.h>
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29 #include "lisp.h"
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30
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31 #include "buffer.h"
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32 #include "charset.h"
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33 #include "file-coding.h"
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34 #include "lstream.h"
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35 #include "profile.h"
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36
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37
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38 /************************************************************************/
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39 /* long comments */
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40 /************************************************************************/
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41
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42 /* NB: Everything below was written by Ben Wing except as otherwise noted. */
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43
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44 /************************************************************************/
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45 /* */
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46 /* */
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47 /* Part A: More carefully-written documentation */
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48 /* */
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49 /* */
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50 /************************************************************************/
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51
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52 /* Authorship: Ben Wing
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53
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54
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55 ==========================================================================
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56 7. Handling non-default formats
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57 ==========================================================================
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58
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59 We support, at least to some extent, formats other than the default
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60 variable-width format, for speed; all of these alternative formats are
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61 fixed-width. Currently we only handle these non-default formats in
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62 buffers, because access to their text is strictly controlled and thus
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63 the details of the format mostly compartmentalized. The only really
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64 tricky part is the search code -- the regex, Boyer-Moore, and
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65 simple-search algorithms in search.c and regex.c. All other code that
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66 knows directly about the buffer representation is the basic code to
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67 modify or retrieve the buffer text.
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68
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69 Supporting fixed-width formats in Lisp strings is harder, but possible
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70 -- FSF currently does this, for example. In this case, however,
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71 probably only 8-bit-fixed is reasonable for Lisp strings -- getting
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72 non-ASCII-compatible fixed-width formats to work is much, much harder
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73 because a lot of code assumes that strings are ASCII-compatible
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74 (i.e. ASCII + other characters represented exclusively using high-bit
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75 bytes) and a lot of code mixes Lisp strings and non-Lisp strings freely.
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76
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77 The different possible fixed-width formats are 8-bit fixed, 16-bit
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78 fixed, and 32-bit fixed. The latter can represent all possible
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79 characters, but at a substantial memory penalty. The other two can
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80 represent only a subset of the possible characters. How these subsets
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81 are defined can be simple or very tricky.
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82
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83 Currently we support only the default format and the 8-bit fixed format,
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84 and in the latter, we only allow these to be the first 256 characters in
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85 an Ichar (ASCII and Latin 1).
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86
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87 One reasonable approach for 8-bit fixed is to allow the upper half to
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88 represent any 1-byte charset, which is specified on a per-buffer basis.
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89 This should work fairly well in practice since most documents are in
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90 only one foreign language (possibly with some English mixed in). I
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91 think FSF does something like this; or at least, they have something
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92 called nonascii-translation-table and use it when converting from
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93 8-bit-fixed text ("unibyte text") to default text ("multibyte text").
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94 With 16-bit fixed, you could do something like assign chunks of the 64K
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95 worth of characters to charsets as they're encountered in documents.
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96 This should work well with most Asian documents.
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97
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98 If/when we switch to using Unicode internally, we might have formats more
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99 like this:
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100
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101 -- UTF-8 or some extension as the default format. Perl uses an
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102 extension that handles 64-bit chars and requires as much as 13 bytes per
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103 char, vs. the standard of 31-bit chars and 6 bytes max. UTF-8 has the
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104 same basic properties as our own variable-width format (see text.c,
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105 Internal String Encoding) and so most code would not need to be changed.
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106
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107 -- UTF-16 as a "pseudo-fixed" format (i.e. 16-bit fixed plus surrogates
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108 for representing characters not in the BMP, aka >= 65536). The vast
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109 majority of documents will have no surrogates in them so byte/char
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110 conversion will be very fast.
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111
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112 -- an 8-bit fixed format, like currently.
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113
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114 -- possibly, UCS-4 as a 32-bit fixed format.
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115
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116 The fixed-width formats essentially treat the buffer as an array of
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117 8-bit, 16-bit or 32-bit integers. This means that how they are stored
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118 in memory (in particular, big-endian or little-endian) depends on the
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119 native format of the machine's processor. It also means we have to
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120 worry a bit about alignment (basically, we just need to keep the gap an
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121 integral size of the character size, and get things aligned properly
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122 when converting the buffer between formats).
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123
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124 ==========================================================================
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125 8. Using UTF-16 as the default text format
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126 ==========================================================================
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127
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128 NOTE: The Eistring API is (or should be) Mule-correct even without
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129 an ASCII-compatible internal representation.
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130
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131 #### Currently, the assumption that text units are one byte in size is
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132 embedded throughout XEmacs, and `Ibyte *' is used where `Itext *' should
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133 be. The way to fix this is to (among other things)
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134
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135 (a) review all places referencing `Ibyte' and `Ibyte *', change them to
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136 use Itext, and fix up the code.
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137 (b) change XSTRING_DATA to be of type Itext *
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138 (c) review all uses of XSTRING_DATA
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139 (d) eliminate XSTRING_LENGTH, splitting it into XSTRING_BYTE_LENGTH and
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140 XSTRING_TEXT_LENGTH and reviewing all places referencing this
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141 (e) make similar changes to other API's that refer to the "length" of
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142 something, such as qxestrlen() and eilen()
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143 (f) review all use of `CIbyte *'. Currently this is usually a way of
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144 passing literal ASCII text strings in places that want internal text.
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145 Either create separate _ascii() and _itext() versions of the
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146 functions taking CIbyte *, or make use of something like the
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147 WEXTTEXT() macro, which will generate wide strings as appropriate.
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148 (g) review all uses of Bytecount and see which ones should be Textcount.
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149 (h) put in error-checking code that will be tripped as often as possible
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150 when doing anything with internal text, and check to see that ASCII
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151 text has not mistakenly filtered in. This should be fairly easy as
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152 ASCII text will generally be entirely spaces and letters whereas every
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153 second byte of Unicode text will generally be a null byte. Either we
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154 abort if the second bytes are entirely letters and numbers, or,
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155 perhaps better, do the equivalent of a non-MULE build, where we should
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156 be dealing entirely with 8-bit characters, and assert that the high
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157 bytes of each pair are null.
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158 (i) review places where xmalloc() is called. If we convert each use of
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159 xmalloc() to instead be xnew_array() or some other typed routine,
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160 then we will find every place that allocates space for Itext and
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161 assumes it is based on one-byte units.
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162 (j) encourage the use of ITEXT_ZTERM_SIZE instead of '+ 1' whenever we
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163 are adding space for a zero-terminator, to emphasize what we are
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164 doing and make sure the calculations are correct. Similarly for
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165 EXTTEXT_ZTERM_SIZE.
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166 (k) Note that the qxestr*() functions, among other things, will need to
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167 be rewritten.
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168
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169 Note that this is a lot of work, and is not high on the list of priorities
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170 currently.
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171
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172 ==========================================================================
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173 9. Miscellaneous
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174 ==========================================================================
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175
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176 A. Unicode Support
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177
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178 Unicode support is very desirable. Currrently we know how to handle
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179 externally-encoded Unicode data in various encodings -- UTF-16, UTF-8,
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180 etc. However, we really need to represent Unicode characters internally
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181 as-is, rather than converting to some language-specific character set.
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182 For efficiency, we should represent Unicode characters using 3 bytes
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183 rather than 4. This means we need to find leading bytes for Unicode.
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184 Given that there are 65,536 characters in Unicode and we can attach
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185 96x96 = 9,216 characters per leading byte, we need eight leading bytes
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186 for Unicode. We currently have four free (0x9A - 0x9D), and with a
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187 little bit of rearranging we can get five: ASCII doesn't really need to
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188 take up a leading byte. (We could just as well use 0x7F, with a little
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189 change to the functions that assume that 0x80 is the lowest leading
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190 byte.) This means we still need to dump three leading bytes and move
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191 them into private space. The CNS charsets are good candidates since
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192 they are rarely used, and JAPANESE_JISX0208_1978 is becoming less and
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193 less used and could also be dumped.
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194
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195 B. Composite Characters
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196
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197 Composite characters are characters constructed by overstriking two
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198 or more regular characters.
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199
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200 1) The old Mule implementation involves storing composite characters
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201 in a buffer as a tag followed by all of the actual characters
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202 used to make up the composite character. I think this is a bad
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203 idea; it greatly complicates code that wants to handle strings
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204 one character at a time because it has to deal with the possibility
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205 of great big ungainly characters. It's much more reasonable to
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206 simply store an index into a table of composite characters.
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207
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208 2) The current implementation only allows for 16,384 separate
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209 composite characters over the lifetime of the XEmacs process.
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210 This could become a potential problem if the user
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211 edited lots of different files that use composite characters.
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212 Due to FSF bogosity, increasing the number of allowable
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213 composite characters under Mule would decrease the number
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214 of possible faces that can exist. Mule already has shrunk
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215 this to 2048, and further shrinkage would become uncomfortable.
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216 No such problems exist in XEmacs.
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217
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218 Composite characters could be represented as 0x8D C1 C2 C3,
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219 where each C[1-3] is in the range 0xA0 - 0xFF. This allows
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220 for slightly under 2^20 (one million) composite characters
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221 over the XEmacs process lifetime, and you only need to
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222 increase the size of a Mule character from 19 to 21 bits.
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223 Or you could use 0x8D C1 C2 C3 C4, allowing for about
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224 85 million (slightly over 2^26) composite characters.
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225
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226 ==========================================================================
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227 10. Internal API's
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228 ==========================================================================
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229
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230 All of these are documented in more detail in text.h.
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231
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232 @enumerate
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233 @item
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234 Basic internal-format API's
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235
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236 These are simple functions and macros to convert between text
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237 representation and characters, move forward and back in text, etc.
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238
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239 @item
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240 The DFC API
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241
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242 This is for conversion between internal and external text. Note that
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243 there is also the "new DFC" API, which *returns* a pointer to the
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244 converted text (in alloca space), rather than storing it into a
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245 variable.
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246
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247 @item
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248 The Eistring API
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249
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250 (This API is currently under-used) When doing simple things with
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251 internal text, the basic internal-format API's are enough. But to do
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252 things like delete or replace a substring, concatenate various strings,
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253 etc. is difficult to do cleanly because of the allocation issues.
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254 The Eistring API is designed to deal with this, and provides a clean
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255 way of modifying and building up internal text. (Note that the former
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256 lack of this API has meant that some code uses Lisp strings to do
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257 similar manipulations, resulting in excess garbage and increased
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258 garbage collection.)
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259
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260 NOTE: The Eistring API is (or should be) Mule-correct even without
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261 an ASCII-compatible internal representation.
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262 @end enumerate
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263
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264 ==========================================================================
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265 11. Other Sources of Documentation
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266 ==========================================================================
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267
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268 man/lispref/mule.texi
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269 @enumerate
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270 @item
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271 another intro to characters, encodings, etc; #### Merge with the
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272 above info
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273 @item
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274 documentation of ISO-2022
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275 @item
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276 The charset and coding-system Lisp API's
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277 @item
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278 The CCL conversion language for writing encoding conversions
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279 @item
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280 The Latin-Unity package for unifying Latin charsets
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281 @end enumerate
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282
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283 man/internals/internals.texi (the Internals manual)
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284 @enumerate
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285 @item
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286 "Coding for Mule" -- how to write Mule-aware code
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287 @item
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288 "Modules for Internationalization"
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289 @item
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290 "The Text in a Buffer" -- more about the different ways of
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291 viewing buffer positions; #### Merge with the above info
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292 @item
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293 "MULE Character Sets and Encodings" -- yet another intro
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294 to characters, encodings, etc; #### Merge with the
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295 above info; also some documentation of Japanese EUC and JIS7,
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296 and CCL internals
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297 @end enumerate
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298
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299 text.h -- info about specific XEmacs-C API's for handling internal and
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300 external text
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301
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302 intl-win32.c -- Windows-specific I18N information
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303
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304 lisp.h -- some info appears alongside the definitions of the basic
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305 character-related types
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306
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307 unicode.c -- documentation about Unicode translation tables
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308 */
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309
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310
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311 /************************************************************************/
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312 /* */
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313 /* */
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314 /* Part B: Random proposals for work to be done */
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315 /* */
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316 /* */
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317 /************************************************************************/
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318
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319
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320 /*
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321
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322
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323 ==========================================================================
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324 - Mule design issues (ben)
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325 ==========================================================================
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326
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327 circa 1999
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328
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329 Here is a more detailed list of Mule-related projects that we will be
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330 working on. They are more or less ordered according to how we will
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331 proceed, but it's not exact. In particular, there will probably be
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332 time overlap among adjacent projects.
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333
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334 @enumerate
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335 @item
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336 Modify the internal/external conversion macros to allow for
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337 MS Windows support.
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338
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339 @item
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340 Modify the buffer macros to allow for more than one internal
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341 representation, e.g. fixed width and variable width.
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342
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343 @item
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344 Review the existing Mule code, especially the lisp code, for code
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345 quality issues and improve the cleanliness of it. Also work on
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346 creating a specification for the Mule API.
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347
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348 @item
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349 Write some more automated mule tests.
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350
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351 @item
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352 Integrate Tomohiko's UTF-2000 code, fixing it up so that nothing is
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353 broken when the UTF-2000 configure option is not enabled.
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354
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355 @item
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356 Fix up the MS Windows code to be Mule-correct, so that you can
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357 compile with Mule support under MS windows and have a working
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358 XEmacs, at least just with Latin-1.
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359
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360 @item
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361 Implement a scheme to guarantee no corruption of files, even with
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362 an incorrect coding system - in particular, guarantee no corruption
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363 of binary files.
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364
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365 @item
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366 Make the text property support in XEmacs robust with respect to
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367 string and text operations, so that the `no corruption' support in
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368 the previous entry works properly, even if a lot of cutting and
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369 pasting is done.
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370
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371 @item
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372 Improve the handling of auto-detection so that, when there is any
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373 possibility at all of mistake, the user is informed of the detected
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374 encoding and given the choice of choosing other possibilities.
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375
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376 @item
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377 Improve the support for different language environments in XEmacs,
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378 for example, the priority of coding systems used in auto-detection
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379 should properly reflect the language environment. This probably
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380 necessitates rethinking the current `coding system priority'
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381 scheme.
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382
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383 @item
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384 Do quality work to improve the existing UTF-2000 implementation.
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385
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386 @item
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387 Implement preliminary support for 8-bit fixed width
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388 representation. First, we will only implement 7-bit support, and
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389 will fall back to variable width as soon as any non-ASCII
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390 character is encountered. Then we will improve the support to
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391 handle an arbitrary character set in the upper half of the 8-bit space.
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392
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393 @item
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394 Investigate any remaining hurdles to making --with-mule be the
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395 default configure option.
|
|
|
396 @end enumerate
|
|
|
397
|
|
|
398 ==========================================================================
|
|
|
399 - Mule design issues (stephen)
|
|
|
400 ==========================================================================
|
|
|
401
|
|
|
402 What I see as Mule priorities (in rough benefit order, I am not taking
|
|
|
403 account of difficulty, nor the fact that some - eg 8 & 10 - will
|
|
|
404 probably come as packages):
|
|
|
405
|
|
|
406 @enumerate
|
|
|
407 @item
|
|
|
408 Fix the autodetect problem (by making the coding priority list
|
|
|
409 user-configurable, as short as he likes, even null, with "binary"
|
|
|
410 as the default).
|
|
|
411 @item
|
|
|
412 Document the language environments and other Mule "APIs" as
|
|
|
413 implemented (since there is no real design spec). Check to see
|
|
|
414 how and where they are broken.
|
|
|
415 @item
|
|
|
416 Make the Mule menu useful to non-ISO-2022-literate folks.
|
|
|
417 @item
|
|
|
418 Redo the lstreams stuff to make it easy and robust to "pipeline",
|
|
|
419 eg, libz | gnupg | jis2mule.
|
|
|
420 @item
|
|
|
421 Make Custom Mule-aware. (This probably depends on a sensible
|
|
|
422 fonts model.)
|
|
|
423 @item
|
|
|
424 Implement the "literal byte stream" memory feature.
|
|
|
425 @item
|
|
|
426 Study the FSF implementation of Mule for background for 7 & 8.
|
|
|
427 @item
|
|
|
428 Identify desirable Mule features (eg, i18n-ized messages as above,
|
|
|
429 collating tables by language environment, etc). (New features
|
|
|
430 might have priority as high as 9.)
|
|
|
431 @item
|
|
|
432 Specify Mule UIs, APIs, etc, and design and (re)implement them.
|
|
|
433 @item
|
|
|
434 Implement the 8-bit-wide buffer optimization.
|
|
|
435 @item
|
|
|
436 Move the internal encoding to UTF-32 (subject to Olivier's caveats
|
|
|
437 regarding compose characters), with the variable-width char
|
|
|
438 buffers using UTF-8.
|
|
|
439 @item
|
|
|
440 Implement the 16- and 32-bit-wide buffer optimizations.
|
|
|
441 @end enumerate
|
|
|
442
|
|
|
443 ==========================================================================
|
|
|
444 - Mule design issues "short term" (ben)
|
|
|
445 ==========================================================================
|
|
|
446
|
|
|
447 @enumerate
|
|
|
448 @item
|
|
|
449 Finish changes in fixup/directory, get in CVS.
|
|
|
450
|
|
|
451 (Test with and without "quick-build", to see if really faster)
|
|
|
452 (need autoconf)
|
|
|
453
|
|
|
454 @item
|
|
|
455 Finish up Windows/Mule changes. Outline of this elsewhere; Do
|
|
|
456 *minimal* effort.
|
|
|
457
|
|
|
458 @item
|
|
|
459 Continue work on Windows stability, e.g. go through existing notes
|
|
|
460 on Windows Mule-ization + extract all info.
|
|
|
461
|
|
|
462 @item
|
|
|
463 Get Unicode translation tables integrated.
|
|
|
464
|
|
|
465 Finish UCS2/UTF16 coding system.
|
|
|
466
|
|
|
467 @item
|
|
|
468 Make sure coding system priority list is language-environment specific.
|
|
|
469
|
|
|
470 @item
|
|
|
471 Consider moving language selection Menu up to be parallel with Mule menu.
|
|
|
472
|
|
|
473 @item
|
|
|
474 Check to make sure we grok the default locale at startup under
|
|
|
475 Windows and understand the Windows locales. Finish implementation
|
|
|
476 of mswindows-multibyte and make sure it groks all the locales.
|
|
|
477
|
|
|
478 @item
|
|
|
479 Do the above as best as we can without using Unicode tables.
|
|
|
480
|
|
|
481 @item
|
|
|
482 Start tagging all text with a language text property,
|
|
|
483 indicating the current language environment when the text was input.
|
|
|
484
|
|
|
485 @item
|
|
|
486 Make sure we correctly accept input of non-ASCII chars
|
|
|
487 (probably already do!)
|
|
|
488
|
|
|
489 @item
|
|
|
490 Implement active language/keyboard switching under Windows.
|
|
|
491
|
|
|
492 @item
|
|
|
493 Look into implementing support for "MS IME" protocol (Microsoft
|
|
|
494 fancy built-in Asian input methods).
|
|
|
495
|
|
|
496 @item
|
|
|
497 Redo implementation of mswindows-multibyte and internal display to
|
|
|
498 entirely use translation to/from Unicode for increased accuracy.
|
|
|
499
|
|
|
500 @item
|
|
|
501 Implement buf<->char improvements from FSF. Also implement
|
|
|
502 my string byte<->char optimization structure.
|
|
|
503
|
|
|
504 @item
|
|
|
505 Integrate all Mule DOCS from 20.6 or 21.0. Try to add sections
|
|
|
506 for what we've added.
|
|
|
507
|
|
|
508 @item
|
|
|
509 Implement 8-bit fixed width optimizations. Then work on 16-bit.
|
|
|
510 @end enumerate
|
|
|
511
|
|
|
512 ==========================================================================
|
|
|
513 - Mule design issues (more) (ben)
|
|
|
514 ==========================================================================
|
|
|
515
|
|
|
516 Get minimal Mule for Windows working using Ikeyama's patches. At
|
|
|
517 first, rely on his conversion of internal -> external
|
|
|
518 locale-specific but very soon (as soon as we get translation
|
|
|
519 tables) can switch to using Unicode versions of display funs, which
|
|
|
520 will allow many more charsets to be handled and in a more
|
|
|
521 consistent fashion.
|
|
|
522
|
|
|
523 i.e. to convert an internal string to an external format, at first
|
|
|
524 we use our own knowledge of the Microsoft locale file formats but
|
|
|
525 an alternative is to convert to Unicode and use Microsoft's
|
|
|
526 convert-Unicode-to-locale encoding functions. This gains us a
|
|
|
527 great deal of generality, since in practice all charset caching
|
|
|
528 points can be wrapped into Unicode caching points.
|
|
|
529
|
|
|
530 This requires adding UCS2 support, which I'm doing. This support
|
|
|
531 would let us convert internal -> Unicode, which is exactly what we
|
|
|
532 want.
|
|
|
533
|
|
|
534 At first, though, I would do the UCS2 support, but leave the
|
|
|
535 existing way of doing things in redisplay. Meanwhile, I'd go
|
|
|
536 through and fix up the places in the code that assume we are
|
|
|
537 dealing with unibytes.
|
|
|
538
|
|
|
539 After this, the font problems will be fixed , we should have a
|
|
|
540 pretty well working XEmacs + MULE under Windows. The only real
|
|
|
541 other work is the clipboard code, which should be straightforward.
|
|
|
542
|
|
|
543 ==========================================================================
|
|
|
544 - Mule design discussion
|
|
|
545 ==========================================================================
|
|
|
546
|
|
|
547 --------------------------------------------------------------------------
|
|
|
548
|
|
|
549 Ben
|
|
|
550
|
|
|
551 April 11, 2000
|
|
|
552
|
|
|
553 Well yes, this was the whole point of my "no lossage" proposal of being
|
|
|
554 able to undo any coding-system transformation on a buffer. The idea was
|
|
|
555 to figure out which transformations were definitely reversable, and for
|
|
|
556 all the others, cache the original text in a text property. This way, you
|
|
|
557 could probably still do a fairly good job at constructing a good reversal
|
|
|
558 even after you've gone into the text and added, deleted, and rearranged
|
|
|
559 some things.
|
|
|
560
|
|
|
561 But you could implement it much more simply and usefully by just
|
|
|
562 determining, for any text being decoded into mule-internal, can we go back
|
|
|
563 and read the source again? If not, remember the entire file (GNUS
|
|
|
564 message, etc) in text properties. Then, implement the UI interface (like
|
|
|
565 Netscape's) on top of that. This way, you have something that at least
|
|
|
566 works, but it might be inefficient. All we would need to do is work on
|
|
|
567 making the
|
|
|
568 underlying implementation more efficient.
|
|
|
569
|
|
|
570 Are you interested in doing this? It would be a huge win for users.
|
|
|
571 Hrvoje Niksic wrote:
|
|
|
572
|
|
|
573 > Ben Wing <ben@666.com> writes:
|
|
|
574 >
|
|
|
575 > > let me know exactly what "rethink" functionality you want and i'll
|
|
|
576 > > come up with an interface. perhaps you just want something like
|
|
|
577 > > netscape's encoding menu, where if you switch encodings, it reloads
|
|
|
578 > > and reencodes?
|
|
|
579 >
|
|
|
580 > It might be a bit more complex than that. In many cases, it's hard or
|
|
|
581 > impossible to meaningfully "reload" -- for instance, this
|
|
|
582 > functionality should be available while editing a Gnus message, as
|
|
|
583 > well as while visiting a file.
|
|
|
584 >
|
|
|
585 > For the special case of Latin-N <-> Latin-M conversion, things could
|
|
|
586 > be done easily -- to convert from N to M, you only need to convert
|
|
|
587 > internal representation back to N, and then convert it forth to M.
|
|
|
588
|
|
|
589 --------------------------------------------------------------------------
|
|
|
590 April 11, 2000
|
|
|
591
|
|
|
592 Well yes, this was the whole point of my "no lossage" proposal of being
|
|
|
593 able to undo any coding-system transformation on a buffer. The idea was
|
|
|
594 to figure out which transformations were definitely reversable, and for
|
|
|
595 all the others, cache the original text in a text property. This way, you
|
|
|
596 could probably still do a fairly good job at constructing a good reversal
|
|
|
597 even after you've gone into the text and added, deleted, and rearranged
|
|
|
598 some things.
|
|
|
599
|
|
|
600 But you could implement it much more simply and usefully by just
|
|
|
601 determining, for any text being decoded into mule-internal, can we go back
|
|
|
602 and read the source again? If not, remember the entire file (GNUS
|
|
|
603 message, etc) in text properties. Then, implement the UI interface (like
|
|
|
604 Netscape's) on top of that. This way, you have something that at least
|
|
|
605 works, but it might be inefficient. All we would need to do is work on
|
|
|
606 making the
|
|
|
607 underlying implementation more efficient.
|
|
|
608
|
|
|
609 Are you interested in doing this? It would be a huge win for users.
|
|
|
610 Hrvoje Niksic wrote:
|
|
|
611
|
|
|
612 > Ben Wing <ben@666.com> writes:
|
|
|
613 >
|
|
|
614 > > let me know exactly what "rethink" functionality you want and i'll
|
|
|
615 > > come up with an interface. perhaps you just want something like
|
|
|
616 > > netscape's encoding menu, where if you switch encodings, it reloads
|
|
|
617 > > and reencodes?
|
|
|
618 >
|
|
|
619 > It might be a bit more complex than that. In many cases, it's hard or
|
|
|
620 > impossible to meaningfully "reload" -- for instance, this
|
|
|
621 > functionality should be available while editing a Gnus message, as
|
|
|
622 > well as while visiting a file.
|
|
|
623 >
|
|
|
624 > For the special case of Latin-N <-> Latin-M conversion, things could
|
|
|
625 > be done easily -- to convert from N to M, you only need to convert
|
|
|
626 > internal representation back to N, and then convert it forth to M.
|
|
|
627
|
|
|
628
|
|
|
629 ------------------------------------------------------------------------
|
|
|
630
|
|
|
631 ==========================================================================
|
|
|
632 - Redoing translation macros [old]
|
|
|
633 ==========================================================================
|
|
|
634
|
|
|
635 Currently the translation macros (the macros with names such as
|
|
|
636 GET_C_STRING_CTEXT_DATA_ALLOCA) have names that are difficult to parse
|
|
|
637 or remember, and are not all that general. In the process of
|
|
|
638 reviewing the Windows code so that it could be muleized, I discovered
|
|
|
639 that these macros need to be extended in various ways to allow for
|
|
|
640 the Windows code to be easily muleized.
|
|
|
641
|
|
|
642 Since the macros needed to be changed anyways, I figured it would be a
|
|
|
643 good time to redo them properly. I propose new macros which have
|
|
|
644 names like this:
|
|
|
645
|
|
|
646 @itemize @bullet
|
|
|
647 @item
|
|
|
648 <A>_TO_EXTERNAL_FORMAT_<B>
|
|
|
649 @item
|
|
|
650 <A>_TO_EXTERNAL_FORMAT_<B>_1
|
|
|
651 @item
|
|
|
652 <C>_TO_INTERNAL_FORMAT_<D>
|
|
|
653 @item
|
|
|
654 <C>_TO_INTERNAL_FORMAT_<D>_1
|
|
|
655 @end itemize
|
|
|
656
|
|
|
657 A and C represent the source of the data, and B and D represent the
|
|
|
658 sink of the data.
|
|
|
659
|
|
|
660 All of these macros call either the functions
|
|
|
661 convert_to_external_format or convert_to_internal_format internally,
|
|
|
662 with some massaging of the arguments.
|
|
|
663
|
|
|
664 All of these macros take the following arguments:
|
|
|
665
|
|
|
666 @itemize @bullet
|
|
|
667 @item
|
|
|
668 First, one or two arguments indicating the source of the data.
|
|
|
669 @item
|
|
|
670 Second, an argument indicating the coding system. (In order to avoid
|
|
|
671 an excessive number of macros, we no longer provide separate macros
|
|
|
672 for specific coding systems.)
|
|
|
673 @item
|
|
|
674 Third, one or two arguments indicating the sink of the data.
|
|
|
675 @item
|
|
|
676 Fourth, optionally, arguments indicating the error behavior and the
|
|
|
677 warning class (these arguments are only present in the _1 versions
|
|
|
678 of the macros). The other, shorter named macros are trivial
|
|
|
679 interfaces onto these macros with the error behavior being
|
|
|
680 ERROR_ME_WARN, with the warning class being Vstandard_warning_class.
|
|
|
681 @end itemize
|
|
|
682
|
|
|
683 <A> can be one of the following:
|
|
|
684 @itemize @bullet
|
|
|
685 @item
|
|
|
686 LISP (which means a Lisp string) Takes one argument, a Lisp Object.
|
|
|
687 @item
|
|
|
688 LSTREAM (which indicates an lstream) Takes one argument, an
|
|
|
689 lstream. The data is read from the lstream until EOF is reached.
|
|
|
690 @item
|
|
|
691 DATA (which indicates a raw memory area) Takes two arguments, a
|
|
|
692 pointer and a length in bytes.
|
|
|
693 (You must never use this if the source of the data is a Lisp string,
|
|
|
694 because of the possibility of relocation during garbage collection.)
|
|
|
695 @end itemize
|
|
|
696
|
|
|
697 <B> can be one of the following:
|
|
|
698 @itemize @bullet
|
|
|
699 @item
|
|
|
700 ALLOCA (which means that the resulting data is stored in alloca()ed
|
|
|
701 memory. Two arguments should be specified, a pointer and a length,
|
|
|
702 which should be lvalues.)
|
|
|
703 @item
|
|
|
704 MALLOC (which means that the resulting data is stored in malloc()ed
|
|
|
705 memory. Two arguments should be specified, a pointer and a
|
|
|
706 length. The memory must be free()d by the caller.
|
|
|
707 @item
|
|
|
708 OPAQUE (which means the resulting data is stored in an opaque Lisp
|
|
|
709 Object. This takes one argument, a lvalue Lisp Object.
|
|
|
710 @item
|
|
|
711 LSTREAM. The data is written to an lstream.
|
|
|
712 @end itemize
|
|
|
713
|
|
|
714 <C> can be one of the :
|
|
|
715 @itemize @bullet
|
|
|
716 @item
|
|
|
717 DATA
|
|
|
718 @item
|
|
|
719 LSTREAM
|
|
|
720 @end itemize
|
|
|
721 (just like <A> above)
|
|
|
722
|
|
|
723 <D> can be one of
|
|
|
724 @itemize @bullet
|
|
|
725 @item
|
|
|
726 ALLOCA
|
|
|
727 @item
|
|
|
728 MALLOC
|
|
|
729 @item
|
|
|
730 LISP This means a Lisp String.
|
|
|
731 @item
|
|
|
732 BUFFER The resulting data is inserted into a buffer at the buffer's
|
|
|
733 value of point.
|
|
|
734 @item
|
|
|
735 LSTREAM The data is written to the lstream.
|
|
|
736 @end itemize
|
|
|
737
|
|
|
738
|
|
|
739 Note that I have eliminated the FORMAT argument of previous macros,
|
|
|
740 and replaced it with a coding system. This was made possible by
|
|
|
741 coding system aliases. In place of old `format's, we use a `virtual
|
|
|
742 coding system', which is aliased to the actual coding system.
|
|
|
743
|
|
|
744 The value of the coding system argument can be anything that is legal
|
|
|
745 input to get_coding_system, i.e. a symbol or a coding system object.
|
|
|
746
|
|
|
747 ==========================================================================
|
|
|
748 - creation of generic macros for accessing internally formatted data [old]
|
|
|
749 ==========================================================================
|
|
|
750
|
|
|
751 I have a design; it's all written down (I did it in Tsukuba), and I just have
|
|
|
752 to have it transcribed. It's higher level than the macros, though; it's Lisp
|
|
|
753 primitives that I'm designing.
|
|
|
754
|
|
|
755 As for the design of the macros, don't worry so much about all files having to
|
|
|
756 get included (which is inevitable with macros), but about how the files are
|
|
|
757 separated. Your design might go like this:
|
|
|
758
|
|
|
759 @enumerate
|
|
|
760 @item
|
|
|
761 you have generic macro interfaces, which specify a particular
|
|
|
762 behavior but not an implementation. these generic macros have
|
|
|
763 complementary versions for buffers and for strings (and the buffer
|
|
|
764 or string is an argument to all of the macros), and do such things
|
|
|
765 as convert between byte and char indices, retrieve the character at
|
|
|
766 a particular byte or char index, increment or decrement a byte
|
|
|
767 index to the beginning of the next or previous character, indicate
|
|
|
768 the number of bytes occupied by the character at a particular byte
|
|
|
769 or character index, etc. These are similar to what's already out
|
|
|
770 there except that they confound buffers and strings and that they
|
|
|
771 can also work with actual char *'s, which I think is a really bad
|
|
|
772 idea because it encourages code to "assume" that the representation
|
|
|
773 is ASCII compatible, which is might not be (e.g. 16-bit fixed
|
|
|
774 width). In fact, one thing I'm planning on doing is redefining
|
|
|
775 Bufbyte as a struct, for debugging purposes, to catch all places
|
|
|
776 that cavalierly compare them with ASCII char's. Note also that I
|
|
|
777 really want to rename Bufpos and Bytind, which are confusing and
|
|
|
778 wrong in that they also apply to strings. They should be Bytepos
|
|
|
779 and Charpos, or something like that, to go along with Bytecount and
|
|
|
780 Charcount. Similarly, Bufbyte is similarly a misnomer and should be
|
|
|
781 Intbyte -- a byte in the internal string representation (any of the
|
|
|
782 internal representations) of a string or buffer. Corresponding to
|
|
|
783 this is Extbyte (which we already have), a byte in any external
|
|
|
784 string representation. We also have Extcount, which makes sense,
|
|
|
785 and we might possibly want Extcharcount, the number of characters
|
|
|
786 in an external string representation; but that gets sticky in modal
|
|
|
787 encodings, and it's not clear how useful it would be.
|
|
|
788
|
|
|
789 @item
|
|
|
790 for all generic macro interfaces, there are specific versions of
|
|
|
791 each of them for each possible representation (pure ASCII in the
|
|
|
792 non-Mule world, Mule standard, UTF-8, 8-bit fixed, 16-bit fixed,
|
|
|
793 32-bit fixed, etc.; there may well be more than one possible 16-bit
|
|
|
794 fixed version, as well). Each representation has a corresponding
|
|
|
795 prefix, e.g. MULE_ or FIXED16_ or whatever, which is prefixed onto
|
|
|
796 the generic macro names. The resulting macros perform the
|
|
|
797 operation defined for the macro, but assume, and only work
|
|
|
798 correctly with, text in the corresponding representation.
|
|
|
799
|
|
|
800 @item
|
|
|
801 The definition of the generic versions merely conditionalizes on
|
|
|
802 the appropriate things (i.e. bit flags in the buffer or string
|
|
|
803 object) and calls the appropriate representation-specific version.
|
|
|
804 There may be more than one definition (protected by ifdefs, of
|
|
|
805 course), or one definition that amalgamated out of many ifdef'ed
|
|
|
806 sections.
|
|
|
807
|
|
|
808 @item
|
|
|
809 You should probably put each different representation in its own
|
|
|
810 header file, e.g. charset-mule.h or charset-fixed16.h or
|
|
|
811 charset-ascii.h or whatever. Then put the main macros into
|
|
|
812 charset.h, and conditionalize in this file appropriately to include
|
|
|
813 the other ones. That way, code that actually needs to play around
|
|
|
814 with internal-format text at this level can include "charset.h"
|
|
|
815 (certainly a much better place than buffer.h), and everyone else
|
|
|
816 uses higher-level routines. The representation-specific macros
|
|
|
817 should not normally be used *directly* at all; they are invoked
|
|
|
818 automatically from the generic macros. However, code that needs to
|
|
|
819 be highly, highly optimized might choose to take a loop and write
|
|
|
820 two versions of it, one for each representation, to avoid the
|
|
|
821 per-loop-iteration cost of a comparison. Until the macro interface
|
|
|
822 is rock stable and solid, we should strongly discourage such
|
|
|
823 nanosecond optimizations.
|
|
|
824 @end enumerate
|
|
|
825
|
|
|
826 ==========================================================================
|
|
|
827 - UTF-16 compatible representation
|
|
|
828 ==========================================================================
|
|
|
829
|
|
|
830 NOTE: One possible default internal representation that was compatible
|
|
|
831 with UTF16 but allowed all possible chars in UCS4 would be to take a
|
|
|
832 more-or-less unused range of 2048 chars (not from the private area
|
|
|
833 because Microsoft actually uses up most or all of it with EUDC chars).
|
|
|
834 Let's say we picked A400 - ABFF. Then, we'd have:
|
|
|
835
|
|
|
836 0000 - FFFF Simple chars
|
|
|
837
|
|
|
838 D[8-B]xx D[C-F]xx Surrogate char, represents 1M chars
|
|
|
839
|
|
|
840 A[4-B]xx D[C-F]xx D[C-F]xx Surrogate char, represents 2G chars
|
|
|
841
|
|
|
842 This is exactly the same number of chars as UCS-4 handles, and it follows the
|
|
|
843 same property as UTF8 and Mule-internal:
|
|
|
844
|
|
|
845 @enumerate
|
|
|
846 @item
|
|
|
847 There are two disjoint groupings of units, one representing leading units
|
|
|
848 and one representing non-leading units.
|
|
|
849 @item
|
|
|
850 Given a leading unit, you immediately know how many units follow to make
|
|
|
851 up a valid char, irrespective of any other context.
|
|
|
852 @end enumerate
|
|
|
853
|
|
|
854 Note that A4xx is actually currently assigned to Yi. Since this is an
|
|
|
855 internal representation, we could just move these elsewhere.
|
|
|
856
|
|
|
857 An alternative is to pick two disjoint ranges, e.g. 2D00 - 2DFF and
|
|
|
858 A500 - ABFF.
|
|
|
859
|
|
|
860 ==========================================================================
|
|
|
861 New API for char->font mapping
|
|
|
862 ==========================================================================
|
|
|
863 - ; supersedes charset-registry and CCL;
|
|
|
864 supports all windows systems; powerful enough for Unicode; etc.
|
|
|
865
|
|
|
866 (charset-font-mapping charset)
|
|
|
867
|
|
|
868 font-mapping-specifier string
|
|
|
869
|
|
|
870 char-font-mapping-table
|
|
|
871
|
|
|
872 char-table, specifier; elements of char table are either strings (which
|
|
|
873 specify a registry or comparable font property, or vectors of a string
|
|
|
874 (same) followed by keyword-value pairs (optional). The only allowable
|
|
|
875 keyword currently is :ccl-program, which specifies a CCL program to map
|
|
|
876 the characters into font indices. Other keywords may be added
|
|
|
877 e.g. allowing Elisp fragments instead of CCL programs, also allowed is
|
|
|
878 [inherit], which inherits from the next less-specific char-table in the
|
|
|
879 specifier.
|
|
|
880
|
|
|
881 The preferred interface onto this mapping (which should be portable
|
|
|
882 across Emacsen) is
|
|
|
883
|
|
|
884 (set-char-font-mapping key value &optional locale tag-set how-to-add)
|
|
|
885
|
|
|
886 where key is a char, range or charset (as for put-char-table), value is
|
|
|
887 as above, and the other arguments are standard for specifiers. This
|
|
|
888 automatically creates a char table in the locale, as necessary (all
|
|
|
889 elements default to [inherit]). On GNU Emacs, some specifiers arguments
|
|
|
890 may be unimplemented.
|
|
|
891
|
|
|
892 (char-font-mapping key value &optional locale)
|
|
|
893 works vaguely like get-specifier? But does inheritance processing.
|
|
|
894 locale should clearly default here to current-buffer
|
|
|
895
|
|
|
896 #### should get-specifier as well? Would make it work most like
|
|
|
897 #### buffer-local variables.
|
|
|
898
|
|
|
899 NB. set-charset-registry and set-charset-ccl-program are obsoleted.
|
|
|
900
|
|
|
901 ==========================================================================
|
|
|
902 Implementing fixed-width 8,16,32 bit buffer optimizations
|
|
|
903 ==========================================================================
|
|
|
904
|
|
|
905 Add set-buffer-optimization (buffer &rest keywords) for
|
|
|
906 controlling these things.
|
|
|
907
|
|
|
908 Also, put in hack so that correct arglist can be retrieved by
|
|
|
909 Lisp code.
|
|
|
910
|
|
|
911 Look at the way keyword primitives are currently handled; make
|
|
|
912 sure it works and is documented, etc.
|
|
|
913
|
|
|
914 Implement 8-bit fixed width optimization. Take the things that
|
|
|
915 know about the actual implementation and put them in a single
|
|
|
916 file, in essence creating an abstraction layer to allow
|
|
|
917 pluggable internal representations. Implement a fairly general
|
|
|
918 scheme for mapping between character codes in the 8 bits or 16
|
|
|
919 bits representation and on actual charset characters. As part of
|
|
|
920 set-buffer-optimization, you can specify a list of character sets
|
|
|
921 to be used in the 8 bit to 16 bit, etc. world. You can also
|
|
|
922 request that the buffer be in 8, 16, etc. if possible.
|
|
|
923
|
|
|
924 -> set defaults wrt this.
|
|
|
925 -> perhaps this should be just buffer properties.
|
|
|
926 -> this brings up the idea of default properties on an object.
|
|
|
927 -> Implement default-put, default-get, etc.
|
|
|
928
|
|
|
929 What happens when a character not assigned in the range gets
|
|
|
930 added? Then, must convert to variable width of some sort.
|
|
|
931
|
|
|
932 Note: at first, possibly we just convert whole hog to get things
|
|
|
933 right. Then we'd have to poy alternative to characters that got
|
|
|
934 added + deleted that were unassigned in the fixed width. When
|
|
|
935 this goes to zero and there's been enough time (heuristics), we
|
|
|
936 go back to fixed.
|
|
|
937
|
|
|
938 Side note: We could dynamically build up the set of assigned
|
|
|
939 chars as they go. Conceivably this could even go down to the
|
|
|
940 single char level: Just keep a big array of mapping from 16 bit
|
|
|
941 values to chars, and add empty time, a char has been encountered
|
|
|
942 that wasn't there before. Problem need inverse mapping.
|
|
|
943
|
|
|
944 -> Possibility; chars are actual objects, not just numbers.
|
|
|
945 Then you could keep track of such info in the chars itself.
|
|
|
946 *Think about this.*
|
|
|
947
|
|
|
948 Eventually, we might consider allowing mixed fixed-width,
|
|
|
949 variable-width buffer encodings. Then, we use range tables to
|
|
|
950 indicate which sections are fixed and which variable and INC_CHAR does
|
|
|
951 something like this: binary search to find the current range, which
|
|
|
952 indicates whether it's fixed or variable, and tells us what the
|
|
|
953 increment is. We can cache this info and use it next time to speed
|
|
|
954 up.
|
|
|
955
|
|
|
956 -> We will then have two partially shared range tables - one for
|
|
|
957 overall fixed width vs. variable width, and possibly one containing
|
|
|
958 this same info, but partitioning the variable width in one. Maybe
|
|
|
959 need fancier nested range table model.
|
|
|
960
|
|
|
961 ==========================================================================
|
|
|
962 Expansion of display table and case mapping table support for all
|
|
|
963 chars, not just ASCII/Latin1.
|
|
|
964 ==========================================================================
|
|
|
965
|
|
|
966 ==========================================================================
|
|
|
967 Improved flexibility for display tables, and evaluation of its
|
|
|
968 features to make sure it meshes with and complements the char<->font
|
|
|
969 mapping API mentioned earlier
|
|
|
970 ==========================================================================
|
|
|
971
|
|
|
972 ==========================================================================
|
|
|
973 String access speedup:
|
|
|
974 ==========================================================================
|
|
|
975
|
|
|
976 For strings larger than some size in bytes (10?), keep extra fields of
|
|
|
977 info: length in chars, and a (char, byte) pair in the middle to speed
|
|
|
978 up sequential access.
|
|
|
979
|
|
|
980 (Better idea: do this for any size string, but only if it contains
|
|
|
981 non-ASCII chars. Then if info is missing, we know string is
|
|
|
982 ASCII-only.)
|
|
|
983
|
|
|
984 Use a string-extra-info object, replacing string property slot and
|
|
|
985 containing fields for string mod tick, string extents, string props,
|
|
|
986 and string char length, and cached (char,byte) pair.
|
|
|
987 string-extra-info (or string-auxiliary?) objects could be in frob
|
|
|
988 blocks, esp. if creating frob blocks is easy + worth it.
|
|
|
989
|
|
|
990 - Caching of char<->byte conversions in strings - should make nearly
|
|
|
991 all operations on strings O(N)
|
|
|
992
|
|
|
993 ==========================================================================
|
|
|
994 Improvements in buffer char<->byte mapping
|
|
|
995 ==========================================================================
|
|
|
996
|
|
|
997 - Range table implementation - especially when there are few runs of
|
|
|
998 different widths, e.g. recently converted from fixed-width
|
|
|
999 optimization to variable width
|
|
|
1000
|
|
|
1001 Range Tables to speed up Bufpos <-> Bytind caching
|
|
|
1002 ==================================================
|
|
|
1003
|
|
|
1004 This describes an alternative implementation using ranges. We
|
|
|
1005 maintain a range table of all spans of characters of a fixed width.
|
|
|
1006 Updating this table could take time if there are a large number of
|
|
|
1007 spans; but constant factors of operations should be quick. This method really wins
|
|
|
1008 when you have 8-bit buffers just converted to variable width, where
|
|
|
1009 there will be few spans. More specifically, lookup in this range
|
|
|
1010 table is O(log N) and can be done with simple binary search, which is
|
|
|
1011 very fast. If we maintain the ranges using a gap array, updating this
|
|
|
1012 table will be fast for local operations, which is most of the time.
|
|
|
1013
|
|
|
1014 We will also provide (at first, at least) a Lisp function to set the
|
|
|
1015 caching mechanism explicitly - either range tables or the existing
|
|
|
1016 implementation. Eventually, we want to improve things, to the point
|
|
|
1017 where we automatically pick the right caching for the situation and
|
|
|
1018 have more caching schemes implemented.
|
|
|
1019
|
|
|
1020 ==========================================================================
|
|
|
1021 - Robustify Text Properties
|
|
|
1022 ==========================================================================
|
|
|
1023
|
|
|
1024 ==========================================================================
|
|
|
1025 Support for unified internal representation, e.g. Unicode
|
|
|
1026 ==========================================================================
|
|
|
1027
|
|
|
1028 Start tagging all text with a language text property,
|
|
|
1029 indicating the current language environment when the text was input.
|
|
|
1030 (needs "Robustify Text Properties")
|
|
|
1031
|
|
|
1032 ==========================================================================
|
|
|
1033 - Generalized Coding Systems
|
|
|
1034 ==========================================================================
|
|
|
1035
|
|
|
1036 - Lisp API for Defining Coding Systems
|
|
|
1037
|
|
|
1038 User-defined coding systems.
|
|
|
1039
|
|
|
1040 (define-coding-system-type 'type
|
|
|
1041 :encode-function fun
|
|
|
1042 :decode-function fun
|
|
|
1043 :detect-function fun
|
|
|
1044 :buffering (number = at least this many chars
|
|
|
1045 line = buffer up to end of line
|
|
|
1046 regexp = buffer until this regexp is found in match
|
|
|
1047 source data. match data will be appropriate when fun is
|
|
|
1048 called
|
|
|
1049
|
|
|
1050 encode fun is called as
|
|
|
1051
|
|
|
1052 (encode instream outstream)
|
|
|
1053
|
|
|
1054 should read data from instream and write converted result onto
|
|
|
1055 outstream. Can leave some data stuff in stream, it will reappear
|
|
|
1056 next time. Generally, there is a finite amount of data in instream
|
|
|
1057 and further attempts to read lead to would-block errors or retvals.
|
|
|
1058 Can use instream properties to record state. May use read-stream
|
|
|
1059 functionality to read everything into a vector or string.
|
|
|
1060
|
|
|
1061 ->Need vectors + string exposed to resizing of Lisp implementation
|
|
|
1062 where necessary.
|
|
|
1063
|
|
|
1064 ==========================================================================
|
|
|
1065 Support Windows Active Kbd Switching, Far East IME API (done already?)
|
|
|
1066 ==========================================================================
|
|
|
1067
|
|
|
1068 ==========================================================================
|
|
|
1069 - UI/design changes for Coding System Pipelining
|
|
|
1070 ==========================================================================
|
|
|
1071
|
|
|
1072 ------------------------------------------------------------------
|
|
|
1073 CODING-SYSTEM CHAINS
|
|
|
1074 ------------------------------------------------------------------
|
|
|
1075
|
|
|
1076 sjt sez:
|
|
|
1077
|
|
|
1078 There should be no elementary coding systems in the Lisp API, only
|
|
|
1079 chains. Chains should be declared, not computed, as a sequence of coding
|
|
|
1080 formats. (Probably the internal representation can be a vector for
|
|
|
1081 efficiency but programmers would probably rather work with lists.) A
|
|
|
1082 stream has a token type. Most streams are octet streams. Text is a
|
|
|
1083 stream of characters (in _internal_ format; a file on disk is not text!)
|
|
|
1084 An octet-stream has no implicit semantics, so its format must always be
|
|
|
1085 specified. The only type currently having semantics is characters. This
|
|
|
1086 means that the chain [euc-jp -> internal -> shift_jis) may be specified
|
|
|
1087 (euc-jp, shift_jis), and if no euc-jp -> shift_jis converter is
|
|
|
1088 available, then the chain is automatically constructed. (N.B. I f we
|
|
|
1089 have fixed width buffers in the future, then we could have ASCII -> 8-bit
|
|
|
1090 char -> 16-bit char -> ISO-2022-JP (with escape sequences).
|
|
|
1091
|
|
|
1092 EOL handling is a char <-> char coding. It should not be part of another
|
|
|
1093 coding system except as a convenience for users. For text coding,
|
|
|
1094 automatically insert EOL handlers between char <-> octet boundaries.
|
|
|
1095
|
|
|
1096 ------------------------------------------------------------------
|
|
|
1097 ABOUT DETECTION
|
|
|
1098 ------------------------------------------------------------------
|
|
|
1099
|
|
|
1100
|
|
|
1101 ------------------------------------------------------------------
|
|
|
1102 EFFICIENCY OF CODING CONVERSION WITH MULTIPLE COPIES/CHAINS
|
|
|
1103 ------------------------------------------------------------------
|
|
|
1104
|
|
|
1105 A comment in encode_decode_coding_region():
|
|
|
1106
|
|
|
1107 The chain of streams looks like this:
|
|
|
1108
|
|
|
1109 [BUFFER] <----- (( read from/send to loop ))
|
|
|
1110 ------> [CHAR->BYTE i.e. ENCODE AS BINARY if source is
|
|
|
1111 in bytes]
|
|
|
1112 ------> [ENCODE/DECODE AS SPECIFIED]
|
|
|
1113 ------> [BYTE->CHAR i.e. DECODE AS BINARY
|
|
|
1114 if sink is in bytes]
|
|
|
1115 ------> [AUTODETECT EOL if
|
|
|
1116 we're decoding and
|
|
|
1117 coding system calls
|
|
|
1118 for this]
|
|
|
1119 ------> [BUFFER]
|
|
|
1120
|
|
|
1121 sjt (?) responds:
|
|
|
1122
|
|
|
1123 Of course, this is just horrible. BYTE<->CHAR should only be available
|
|
|
1124 to I/O routines. It should not be visible to Mule proper.
|
|
|
1125
|
|
|
1126 A comment on the implementation. Hrvoje and Kyle worry about the
|
|
|
1127 inefficiency of repeated copying among buffers that chained coding
|
|
|
1128 systems entail. But this may not be as time inefficient as it appears
|
|
|
1129 in the Mule ("house rules") context. The issue is how do you do chain
|
|
|
1130 coding systems without copying? In theory you could have
|
|
|
1131
|
|
|
1132 IChar external_to_raw (ExtChar *cp, State *s);
|
|
|
1133 IChar decode_utf16 (IChar c, State *s);
|
|
|
1134 IChar decode_crlf (ExtChar *cp, State *s);
|
|
|
1135
|
|
|
1136 typedef Ichar (*Converter[]) (Ichar, State*);
|
|
|
1137
|
|
|
1138 Converter utf16[2] = { &decode_utf16, &decode_crlf };
|
|
|
1139
|
|
|
1140 void convert (ExtChar *inbuf, IChar *outbuf, Converter cvtr)
|
|
|
1141 {
|
|
|
1142 int i;
|
|
|
1143 ExtChar c;
|
|
|
1144 State s;
|
|
|
1145
|
|
|
1146 while (c = external_to_raw (*inbuf++, &s))
|
|
|
1147 {
|
|
|
1148 for (i = 0; i < sizeof(cvtr)/sizeof(Converter); ++i)
|
|
|
1149 if (s.ready)
|
|
|
1150 c = (*cvtr[i]) (c, &s);
|
|
|
1151 }
|
|
|
1152 if (s.ready)
|
|
|
1153 *outbuf++ = c;
|
|
|
1154 }
|
|
|
1155
|
|
|
1156 But this is a lot of function calls; what Ben is doing is basically
|
|
|
1157 reducing this to one call per buffer-full. The only way to avoid this
|
|
|
1158 is to hardcode all the "interesting" coding systems, maybe using
|
|
|
1159 inline or macros to give structure. But this is still a huge amount
|
|
|
1160 of work, and code.
|
|
|
1161
|
|
|
1162 One advantage to the call-per-char approach is that we might be able
|
|
|
1163 to do something about the marker/extent destruction that coding
|
|
|
1164 normally entails.
|
|
|
1165
|
|
|
1166 ben sez:
|
|
|
1167
|
|
|
1168 it should be possible to preserve the markers/extents without
|
|
|
1169 switching completely to one-call-per-char -- we could at least do one
|
|
|
1170 call per "run", where a run is more or less the maximal stretch of
|
|
|
1171 text not overlapping any markers or extent boundaries. (It's a bit
|
|
|
1172 more complicated if we want to properly support the different extent
|
|
|
1173 begins/ends; in some cases we might have to pump a single character
|
|
|
1174 adjacent to where two extents meet.) The "stateless" way that I wrote
|
|
|
1175 all of the conversion routines may be a real hassle but it allows
|
|
|
1176 something like this to work without too much problem -- pump in one
|
|
|
1177 run at a time into one end of the chain, do a flush after each
|
|
|
1178 iteration, and stick what comes out the other end in its place.
|
|
|
1179
|
|
|
1180 ------------------------------------------------------------------
|
|
|
1181 ABOUT FORMATS
|
|
|
1182 ------------------------------------------------------------------
|
|
|
1183
|
|
|
1184 when calling make-coding-system, the name can be a cons of (format1 .
|
|
|
1185 format2), specifying that it decodes format1->format2 and encodes the other
|
|
|
1186 way. if only one name is given, that is assumed to be format1, and the
|
|
|
1187 other is either `external' or `internal' depending on the end type.
|
|
|
1188 normally the user when decoding gives the decoding order in formats, but
|
|
|
1189 can leave off the last one, `internal', which is assumed. a multichain
|
|
|
1190 might look like gzip|multibyte|unicode, using the coding systems named
|
|
|
1191 `gzip', `(unicode . multibyte)' and `unicode'. the way this actually works
|
|
|
1192 is by searching for gzip->multibyte; if not found, look for gzip->external
|
|
|
1193 or gzip->internal. (In general we automatically do conversion between
|
|
|
1194 internal and external as necessary: thus gzip|crlf does the expected, and
|
|
|
1195 maps to gzip->external, external->internal, crlf->internal, which when
|
|
|
1196 fully specified would be gzip|external:external|internal:crlf|internal --
|
|
|
1197 see below.) To forcibly fit together two converters that have explicitly
|
|
|
1198 specified and incompatible names (say you have unicode->multibyte and
|
|
|
1199 iso8859-1->ebcdic and you know that the multibyte and iso8859-1 in this
|
|
|
1200 case are compatible), you can force-cast using :, like this:
|
|
|
1201 ebcdic|iso8859-1:multibyte|unicode. (again, if you force-cast between
|
|
|
1202 internal and external formats, the conversion happens automatically.)
|
|
|
1203
|
|
|
1204 --------------------------------------------------------------------------
|
|
|
1205 ABOUT PDUMP, UNICODE, AND RUNNING XEMACS FROM A DIRECTORY WITH WEIRD CHARS
|
|
|
1206 --------------------------------------------------------------------------
|
|
|
1207
|
|
|
1208 -- there's the problem that XEmacs can't be run in a directory with
|
|
|
1209 non-ASCII/Latin-1 chars in it, since it will be doing Unicode
|
|
|
1210 processing before we've had a chance to load the tables. In fact,
|
|
|
1211 even finding the tables in such a situation is problematic using
|
|
|
1212 the normal commands. my idea is to eventually load the stuff
|
|
|
1213 extremely extremely early, at the same time as the pdump data gets
|
|
|
1214 loaded. in fact, the unicode table data (stored in an efficient
|
|
|
1215 binary format) can even be stuck into the pdump file (which would
|
|
|
1216 mean as a resource to the executable, for windows). we'd need to
|
|
|
1217 extend pdump a bit: to allow for attaching extra data to the pdump
|
|
|
1218 file. (something like pdump_attach_extra_data (addr, length)
|
|
|
1219 returns a number of some sort, an index into the file, which you
|
|
|
1220 can then retrieve with pdump_load_extra_data(), which returns an
|
|
|
1221 addr (mmap()ed or loaded), and later you pdump_unload_extra_data()
|
|
|
1222 when finished. we'd probably also need
|
|
|
1223 pdump_attach_extra_data_append(), which appends data to the data
|
|
|
1224 just written out with pdump_attach_extra_data(). this way,
|
|
|
1225 multiple tables in memory can be written out into one contiguous
|
|
|
1226 table. (we'd use the tar-like trick of allowing new blocks to be
|
|
|
1227 written without going back to change the old blocks -- we just rely
|
|
|
1228 on the end of file/end of memory.) this same mechanism could be
|
|
|
1229 extracted out of pdump and used to handle the non-pdump situation
|
|
|
1230 (or alternatively, we could just dump either the memory image of
|
|
|
1231 the tables themselves or the compressed binary version). in the
|
|
|
1232 case of extra unicode tables not known about at compile time that
|
|
|
1233 get loaded before dumping, we either just dump them into the image
|
|
|
1234 (pdump and all) or extract them into the compressed binary format,
|
|
|
1235 free the original tables, and treat them like all other tables.
|
|
|
1236
|
|
|
1237
|
|
|
1238 ==========================================================================
|
|
|
1239 - Generalized language appropriate word wrapping (requires
|
|
|
1240 layout-exposing API defined in BIDI section)
|
|
|
1241 ==========================================================================
|
|
|
1242
|
|
|
1243 ==========================================================================
|
|
|
1244 - Make Custom Mule-aware
|
|
|
1245 ==========================================================================
|
|
|
1246
|
|
|
1247 ==========================================================================
|
|
|
1248 - Composite character support
|
|
|
1249 ==========================================================================
|
|
|
1250
|
|
|
1251 ==========================================================================
|
|
|
1252 - Language appropriate sorting and searching
|
|
|
1253 ==========================================================================
|
|
|
1254
|
|
|
1255 ==========================================================================
|
|
|
1256 - Glyph shaping for Arabic and Devanagari
|
|
|
1257 ==========================================================================
|
|
|
1258
|
|
|
1259 - (needs to be handled mostly
|
|
|
1260 at C level, as part of layout; luckily it's entirely local in its
|
|
|
1261 changes, as this is not hard)
|
|
|
1262
|
|
|
1263
|
|
|
1264 ==========================================================================
|
|
|
1265 Consider moving language selection Menu up to be parallel with Mule menu
|
|
|
1266 ==========================================================================
|
|
|
1267
|
|
|
1268 */
|
|
|
1269
|
|
|
1270
|
|
771
|
1271
|
|
|
1272 /************************************************************************/
|
|
|
1273 /* declarations */
|
|
|
1274 /************************************************************************/
|
|
|
1275
|
|
|
1276 Eistring the_eistring_zero_init, the_eistring_malloc_zero_init;
|
|
|
1277
|
|
|
1278 #define MAX_CHARBPOS_GAP_SIZE_3 (65535/3)
|
|
|
1279 #define MAX_BYTEBPOS_GAP_SIZE_3 (3 * MAX_CHARBPOS_GAP_SIZE_3)
|
|
|
1280
|
|
|
1281 short three_to_one_table[1 + MAX_BYTEBPOS_GAP_SIZE_3];
|
|
|
1282
|
|
|
1283 #ifdef MULE
|
|
|
1284
|
|
|
1285 /* Table of number of bytes in the string representation of a character
|
|
|
1286 indexed by the first byte of that representation.
|
|
|
1287
|
|
|
1288 rep_bytes_by_first_byte(c) is more efficient than the equivalent
|
|
|
1289 canonical computation:
|
|
|
1290
|
|
826
|
1291 XCHARSET_REP_BYTES (charset_by_leading_byte (c)) */
|
|
771
|
1292
|
|
|
1293 const Bytecount rep_bytes_by_first_byte[0xA0] =
|
|
|
1294 { /* 0x00 - 0x7f are for straight ASCII */
|
|
|
1295 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
|
|
1296 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
|
|
1297 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
|
|
1298 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
|
|
1299 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
|
|
1300 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
|
|
1301 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
|
|
1302 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
|
|
1303 /* 0x80 - 0x8f are for Dimension-1 official charsets */
|
|
|
1304 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
|
|
|
1305 /* 0x90 - 0x9d are for Dimension-2 official charsets */
|
|
|
1306 /* 0x9e is for Dimension-1 private charsets */
|
|
|
1307 /* 0x9f is for Dimension-2 private charsets */
|
|
|
1308 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4
|
|
|
1309 };
|
|
|
1310
|
|
|
1311 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
1312
|
|
|
1313 /* Hash tables for composite chars. One maps string representing
|
|
|
1314 composed chars to their equivalent chars; one goes the
|
|
|
1315 other way. */
|
|
|
1316 Lisp_Object Vcomposite_char_char2string_hash_table;
|
|
|
1317 Lisp_Object Vcomposite_char_string2char_hash_table;
|
|
|
1318
|
|
|
1319 static int composite_char_row_next;
|
|
|
1320 static int composite_char_col_next;
|
|
|
1321
|
|
|
1322 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
1323
|
|
|
1324 #endif /* MULE */
|
|
|
1325
|
|
1292
|
1326 Lisp_Object QSin_char_byte_conversion;
|
|
|
1327 Lisp_Object QSin_internal_external_conversion;
|
|
|
1328
|
|
771
|
1329
|
|
|
1330 /************************************************************************/
|
|
|
1331 /* qxestr***() functions */
|
|
|
1332 /************************************************************************/
|
|
|
1333
|
|
|
1334 /* Most are inline functions in lisp.h */
|
|
|
1335
|
|
|
1336 int
|
|
867
|
1337 qxesprintf (Ibyte *buffer, const CIbyte *format, ...)
|
|
771
|
1338 {
|
|
|
1339 va_list args;
|
|
|
1340 int retval;
|
|
|
1341
|
|
|
1342 va_start (args, format);
|
|
2367
|
1343 retval = vsprintf ((Chbyte *) buffer, format, args);
|
|
771
|
1344 va_end (args);
|
|
|
1345
|
|
|
1346 return retval;
|
|
|
1347 }
|
|
|
1348
|
|
|
1349 /* strcasecmp() implementation from BSD */
|
|
867
|
1350 static Ibyte strcasecmp_charmap[] = {
|
|
1429
|
1351 0000, 0001, 0002, 0003, 0004, 0005, 0006, 0007,
|
|
|
1352 0010, 0011, 0012, 0013, 0014, 0015, 0016, 0017,
|
|
|
1353 0020, 0021, 0022, 0023, 0024, 0025, 0026, 0027,
|
|
|
1354 0030, 0031, 0032, 0033, 0034, 0035, 0036, 0037,
|
|
|
1355 0040, 0041, 0042, 0043, 0044, 0045, 0046, 0047,
|
|
|
1356 0050, 0051, 0052, 0053, 0054, 0055, 0056, 0057,
|
|
|
1357 0060, 0061, 0062, 0063, 0064, 0065, 0066, 0067,
|
|
|
1358 0070, 0071, 0072, 0073, 0074, 0075, 0076, 0077,
|
|
|
1359 0100, 0141, 0142, 0143, 0144, 0145, 0146, 0147,
|
|
|
1360 0150, 0151, 0152, 0153, 0154, 0155, 0156, 0157,
|
|
|
1361 0160, 0161, 0162, 0163, 0164, 0165, 0166, 0167,
|
|
|
1362 0170, 0171, 0172, 0133, 0134, 0135, 0136, 0137,
|
|
|
1363 0140, 0141, 0142, 0143, 0144, 0145, 0146, 0147,
|
|
|
1364 0150, 0151, 0152, 0153, 0154, 0155, 0156, 0157,
|
|
|
1365 0160, 0161, 0162, 0163, 0164, 0165, 0166, 0167,
|
|
|
1366 0170, 0171, 0172, 0173, 0174, 0175, 0176, 0177,
|
|
|
1367 0200, 0201, 0202, 0203, 0204, 0205, 0206, 0207,
|
|
|
1368 0210, 0211, 0212, 0213, 0214, 0215, 0216, 0217,
|
|
|
1369 0220, 0221, 0222, 0223, 0224, 0225, 0226, 0227,
|
|
|
1370 0230, 0231, 0232, 0233, 0234, 0235, 0236, 0237,
|
|
|
1371 0240, 0241, 0242, 0243, 0244, 0245, 0246, 0247,
|
|
|
1372 0250, 0251, 0252, 0253, 0254, 0255, 0256, 0257,
|
|
|
1373 0260, 0261, 0262, 0263, 0264, 0265, 0266, 0267,
|
|
|
1374 0270, 0271, 0272, 0273, 0274, 0275, 0276, 0277,
|
|
|
1375 0300, 0301, 0302, 0303, 0304, 0305, 0306, 0307,
|
|
|
1376 0310, 0311, 0312, 0313, 0314, 0315, 0316, 0317,
|
|
|
1377 0320, 0321, 0322, 0323, 0324, 0325, 0326, 0327,
|
|
|
1378 0330, 0331, 0332, 0333, 0334, 0335, 0336, 0337,
|
|
|
1379 0340, 0341, 0342, 0343, 0344, 0345, 0346, 0347,
|
|
|
1380 0350, 0351, 0352, 0353, 0354, 0355, 0356, 0357,
|
|
|
1381 0360, 0361, 0362, 0363, 0364, 0365, 0366, 0367,
|
|
|
1382 0370, 0371, 0372, 0373, 0374, 0375, 0376, 0377
|
|
771
|
1383 };
|
|
|
1384
|
|
|
1385 /* A version that works like generic strcasecmp() -- only collapsing
|
|
|
1386 case in ASCII A-Z/a-z. This is safe on Mule strings due to the
|
|
|
1387 current representation.
|
|
|
1388
|
|
|
1389 This version was written by some Berkeley coder, favoring
|
|
|
1390 nanosecond improvements over clarity. In all other versions below,
|
|
|
1391 we use symmetrical algorithms that may sacrifice a few machine
|
|
|
1392 cycles but are MUCH MUCH clearer, which counts a lot more.
|
|
|
1393 */
|
|
|
1394
|
|
|
1395 int
|
|
867
|
1396 qxestrcasecmp (const Ibyte *s1, const Ibyte *s2)
|
|
771
|
1397 {
|
|
867
|
1398 Ibyte *cm = strcasecmp_charmap;
|
|
771
|
1399
|
|
|
1400 while (cm[*s1] == cm[*s2++])
|
|
|
1401 if (*s1++ == '\0')
|
|
|
1402 return (0);
|
|
|
1403
|
|
|
1404 return (cm[*s1] - cm[*--s2]);
|
|
|
1405 }
|
|
|
1406
|
|
|
1407 int
|
|
2367
|
1408 ascii_strcasecmp (const Ascbyte *s1, const Ascbyte *s2)
|
|
771
|
1409 {
|
|
867
|
1410 return qxestrcasecmp ((const Ibyte *) s1, (const Ibyte *) s2);
|
|
771
|
1411 }
|
|
|
1412
|
|
|
1413 int
|
|
2367
|
1414 qxestrcasecmp_ascii (const Ibyte *s1, const Ascbyte *s2)
|
|
771
|
1415 {
|
|
867
|
1416 return qxestrcasecmp (s1, (const Ibyte *) s2);
|
|
771
|
1417 }
|
|
|
1418
|
|
|
1419 /* An internationalized version that collapses case in a general fashion.
|
|
|
1420 */
|
|
|
1421
|
|
|
1422 int
|
|
867
|
1423 qxestrcasecmp_i18n (const Ibyte *s1, const Ibyte *s2)
|
|
771
|
1424 {
|
|
|
1425 while (*s1 && *s2)
|
|
|
1426 {
|
|
867
|
1427 if (DOWNCASE (0, itext_ichar (s1)) !=
|
|
|
1428 DOWNCASE (0, itext_ichar (s2)))
|
|
771
|
1429 break;
|
|
867
|
1430 INC_IBYTEPTR (s1);
|
|
|
1431 INC_IBYTEPTR (s2);
|
|
771
|
1432 }
|
|
|
1433
|
|
867
|
1434 return (DOWNCASE (0, itext_ichar (s1)) -
|
|
|
1435 DOWNCASE (0, itext_ichar (s2)));
|
|
771
|
1436 }
|
|
|
1437
|
|
|
1438 /* The only difference between these next two and
|
|
|
1439 qxememcasecmp()/qxememcasecmp_i18n() is that these two will stop if
|
|
|
1440 both strings are equal and less than LEN in length, while
|
|
|
1441 the mem...() versions would would run off the end. */
|
|
|
1442
|
|
|
1443 int
|
|
867
|
1444 qxestrncasecmp (const Ibyte *s1, const Ibyte *s2, Bytecount len)
|
|
771
|
1445 {
|
|
867
|
1446 Ibyte *cm = strcasecmp_charmap;
|
|
771
|
1447
|
|
|
1448 while (len--)
|
|
|
1449 {
|
|
|
1450 int diff = cm[*s1] - cm[*s2];
|
|
|
1451 if (diff != 0)
|
|
|
1452 return diff;
|
|
|
1453 if (!*s1)
|
|
|
1454 return 0;
|
|
|
1455 s1++, s2++;
|
|
|
1456 }
|
|
|
1457
|
|
|
1458 return 0;
|
|
|
1459 }
|
|
|
1460
|
|
|
1461 int
|
|
2367
|
1462 ascii_strncasecmp (const Ascbyte *s1, const Ascbyte *s2, Bytecount len)
|
|
771
|
1463 {
|
|
867
|
1464 return qxestrncasecmp ((const Ibyte *) s1, (const Ibyte *) s2, len);
|
|
771
|
1465 }
|
|
|
1466
|
|
|
1467 int
|
|
2367
|
1468 qxestrncasecmp_ascii (const Ibyte *s1, const Ascbyte *s2, Bytecount len)
|
|
771
|
1469 {
|
|
867
|
1470 return qxestrncasecmp (s1, (const Ibyte *) s2, len);
|
|
771
|
1471 }
|
|
|
1472
|
|
801
|
1473 /* Compare LEN_FROM_S1 worth of characters from S1 with the same number of
|
|
|
1474 characters from S2, case insensitive. NOTE: Downcasing can convert
|
|
|
1475 characters from one length in bytes to another, so reversing S1 and S2
|
|
|
1476 is *NOT* a symmetric operations! You must choose a length that agrees
|
|
|
1477 with S1. */
|
|
|
1478
|
|
771
|
1479 int
|
|
867
|
1480 qxestrncasecmp_i18n (const Ibyte *s1, const Ibyte *s2,
|
|
801
|
1481 Bytecount len_from_s1)
|
|
771
|
1482 {
|
|
801
|
1483 while (len_from_s1 > 0)
|
|
771
|
1484 {
|
|
867
|
1485 const Ibyte *old_s1 = s1;
|
|
|
1486 int diff = (DOWNCASE (0, itext_ichar (s1)) -
|
|
|
1487 DOWNCASE (0, itext_ichar (s2)));
|
|
771
|
1488 if (diff != 0)
|
|
|
1489 return diff;
|
|
|
1490 if (!*s1)
|
|
|
1491 return 0;
|
|
867
|
1492 INC_IBYTEPTR (s1);
|
|
|
1493 INC_IBYTEPTR (s2);
|
|
801
|
1494 len_from_s1 -= s1 - old_s1;
|
|
771
|
1495 }
|
|
|
1496
|
|
|
1497 return 0;
|
|
|
1498 }
|
|
|
1499
|
|
|
1500 int
|
|
867
|
1501 qxememcmp (const Ibyte *s1, const Ibyte *s2, Bytecount len)
|
|
771
|
1502 {
|
|
|
1503 return memcmp (s1, s2, len);
|
|
|
1504 }
|
|
|
1505
|
|
|
1506 int
|
|
867
|
1507 qxememcmp4 (const Ibyte *s1, Bytecount len1,
|
|
|
1508 const Ibyte *s2, Bytecount len2)
|
|
801
|
1509 {
|
|
|
1510 int retval = qxememcmp (s1, s2, min (len1, len2));
|
|
|
1511 if (retval)
|
|
|
1512 return retval;
|
|
|
1513 return len1 - len2;
|
|
|
1514 }
|
|
|
1515
|
|
|
1516 int
|
|
867
|
1517 qxememcasecmp (const Ibyte *s1, const Ibyte *s2, Bytecount len)
|
|
771
|
1518 {
|
|
867
|
1519 Ibyte *cm = strcasecmp_charmap;
|
|
771
|
1520
|
|
|
1521 while (len--)
|
|
|
1522 {
|
|
|
1523 int diff = cm[*s1] - cm[*s2];
|
|
|
1524 if (diff != 0)
|
|
|
1525 return diff;
|
|
|
1526 s1++, s2++;
|
|
|
1527 }
|
|
|
1528
|
|
|
1529 return 0;
|
|
|
1530 }
|
|
|
1531
|
|
|
1532 int
|
|
867
|
1533 qxememcasecmp4 (const Ibyte *s1, Bytecount len1,
|
|
|
1534 const Ibyte *s2, Bytecount len2)
|
|
771
|
1535 {
|
|
801
|
1536 int retval = qxememcasecmp (s1, s2, min (len1, len2));
|
|
|
1537 if (retval)
|
|
|
1538 return retval;
|
|
|
1539 return len1 - len2;
|
|
|
1540 }
|
|
|
1541
|
|
|
1542 /* Do a character-by-character comparison, returning "which is greater" by
|
|
867
|
1543 comparing the Ichar values. (#### Should have option to compare Unicode
|
|
801
|
1544 points) */
|
|
|
1545
|
|
|
1546 int
|
|
867
|
1547 qxetextcmp (const Ibyte *s1, Bytecount len1,
|
|
|
1548 const Ibyte *s2, Bytecount len2)
|
|
801
|
1549 {
|
|
|
1550 while (len1 > 0 && len2 > 0)
|
|
771
|
1551 {
|
|
867
|
1552 const Ibyte *old_s1 = s1;
|
|
|
1553 const Ibyte *old_s2 = s2;
|
|
|
1554 int diff = itext_ichar (s1) - itext_ichar (s2);
|
|
801
|
1555 if (diff != 0)
|
|
|
1556 return diff;
|
|
867
|
1557 INC_IBYTEPTR (s1);
|
|
|
1558 INC_IBYTEPTR (s2);
|
|
801
|
1559 len1 -= s1 - old_s1;
|
|
|
1560 len2 -= s2 - old_s2;
|
|
|
1561 }
|
|
|
1562
|
|
|
1563 assert (len1 >= 0 && len2 >= 0);
|
|
|
1564 return len1 - len2;
|
|
|
1565 }
|
|
|
1566
|
|
|
1567 int
|
|
867
|
1568 qxetextcmp_matching (const Ibyte *s1, Bytecount len1,
|
|
|
1569 const Ibyte *s2, Bytecount len2,
|
|
801
|
1570 Charcount *matching)
|
|
|
1571 {
|
|
|
1572 *matching = 0;
|
|
|
1573 while (len1 > 0 && len2 > 0)
|
|
|
1574 {
|
|
867
|
1575 const Ibyte *old_s1 = s1;
|
|
|
1576 const Ibyte *old_s2 = s2;
|
|
|
1577 int diff = itext_ichar (s1) - itext_ichar (s2);
|
|
801
|
1578 if (diff != 0)
|
|
|
1579 return diff;
|
|
867
|
1580 INC_IBYTEPTR (s1);
|
|
|
1581 INC_IBYTEPTR (s2);
|
|
801
|
1582 len1 -= s1 - old_s1;
|
|
|
1583 len2 -= s2 - old_s2;
|
|
|
1584 (*matching)++;
|
|
|
1585 }
|
|
|
1586
|
|
|
1587 assert (len1 >= 0 && len2 >= 0);
|
|
|
1588 return len1 - len2;
|
|
|
1589 }
|
|
|
1590
|
|
|
1591 /* Do a character-by-character comparison, returning "which is greater" by
|
|
867
|
1592 comparing the Ichar values, case insensitively (by downcasing both
|
|
801
|
1593 first). (#### Should have option to compare Unicode points)
|
|
|
1594
|
|
|
1595 In this case, both lengths must be specified becaused downcasing can
|
|
|
1596 convert characters from one length in bytes to another; therefore, two
|
|
|
1597 blocks of text of different length might be equal. If both compare
|
|
|
1598 equal up to the limit in length of one but not the other, the longer one
|
|
|
1599 is "greater". */
|
|
|
1600
|
|
|
1601 int
|
|
867
|
1602 qxetextcasecmp (const Ibyte *s1, Bytecount len1,
|
|
|
1603 const Ibyte *s2, Bytecount len2)
|
|
801
|
1604 {
|
|
|
1605 while (len1 > 0 && len2 > 0)
|
|
|
1606 {
|
|
867
|
1607 const Ibyte *old_s1 = s1;
|
|
|
1608 const Ibyte *old_s2 = s2;
|
|
|
1609 int diff = (DOWNCASE (0, itext_ichar (s1)) -
|
|
|
1610 DOWNCASE (0, itext_ichar (s2)));
|
|
771
|
1611 if (diff != 0)
|
|
|
1612 return diff;
|
|
867
|
1613 INC_IBYTEPTR (s1);
|
|
|
1614 INC_IBYTEPTR (s2);
|
|
801
|
1615 len1 -= s1 - old_s1;
|
|
|
1616 len2 -= s2 - old_s2;
|
|
771
|
1617 }
|
|
|
1618
|
|
801
|
1619 assert (len1 >= 0 && len2 >= 0);
|
|
|
1620 return len1 - len2;
|
|
|
1621 }
|
|
|
1622
|
|
|
1623 /* Like qxetextcasecmp() but also return number of characters at
|
|
|
1624 beginning that match. */
|
|
|
1625
|
|
|
1626 int
|
|
867
|
1627 qxetextcasecmp_matching (const Ibyte *s1, Bytecount len1,
|
|
|
1628 const Ibyte *s2, Bytecount len2,
|
|
801
|
1629 Charcount *matching)
|
|
|
1630 {
|
|
|
1631 *matching = 0;
|
|
|
1632 while (len1 > 0 && len2 > 0)
|
|
|
1633 {
|
|
867
|
1634 const Ibyte *old_s1 = s1;
|
|
|
1635 const Ibyte *old_s2 = s2;
|
|
|
1636 int diff = (DOWNCASE (0, itext_ichar (s1)) -
|
|
|
1637 DOWNCASE (0, itext_ichar (s2)));
|
|
801
|
1638 if (diff != 0)
|
|
|
1639 return diff;
|
|
867
|
1640 INC_IBYTEPTR (s1);
|
|
|
1641 INC_IBYTEPTR (s2);
|
|
801
|
1642 len1 -= s1 - old_s1;
|
|
|
1643 len2 -= s2 - old_s2;
|
|
|
1644 (*matching)++;
|
|
|
1645 }
|
|
|
1646
|
|
|
1647 assert (len1 >= 0 && len2 >= 0);
|
|
|
1648 return len1 - len2;
|
|
771
|
1649 }
|
|
|
1650
|
|
|
1651 int
|
|
|
1652 lisp_strcasecmp (Lisp_Object s1, Lisp_Object s2)
|
|
|
1653 {
|
|
867
|
1654 Ibyte *cm = strcasecmp_charmap;
|
|
|
1655 Ibyte *p1 = XSTRING_DATA (s1);
|
|
|
1656 Ibyte *p2 = XSTRING_DATA (s2);
|
|
|
1657 Ibyte *e1 = p1 + XSTRING_LENGTH (s1);
|
|
|
1658 Ibyte *e2 = p2 + XSTRING_LENGTH (s2);
|
|
771
|
1659
|
|
|
1660 /* again, we use a symmetric algorithm and favor clarity over
|
|
|
1661 nanosecond improvements. */
|
|
|
1662 while (1)
|
|
|
1663 {
|
|
|
1664 /* if we reached the end of either string, compare lengths.
|
|
|
1665 do NOT compare the final null byte against anything, in case
|
|
|
1666 the other string also has a null byte at that position. */
|
|
|
1667 if (p1 == e1 || p2 == e2)
|
|
|
1668 return e1 - e2;
|
|
|
1669 if (cm[*p1] != cm[*p2])
|
|
|
1670 return cm[*p1] - cm[*p2];
|
|
|
1671 p1++, p2++;
|
|
|
1672 }
|
|
|
1673 }
|
|
|
1674
|
|
|
1675 int
|
|
|
1676 lisp_strcasecmp_i18n (Lisp_Object s1, Lisp_Object s2)
|
|
|
1677 {
|
|
801
|
1678 return qxetextcasecmp (XSTRING_DATA (s1), XSTRING_LENGTH (s1),
|
|
|
1679 XSTRING_DATA (s2), XSTRING_LENGTH (s2));
|
|
771
|
1680 }
|
|
|
1681
|
|
2367
|
1682 /* Compare a wide string with an ASCII string */
|
|
|
1683
|
|
|
1684 int
|
|
|
1685 wcscmp_ascii (const wchar_t *s1, const Ascbyte *s2)
|
|
|
1686 {
|
|
|
1687 while (*s1 && *s2)
|
|
|
1688 {
|
|
|
1689 if (*s1 != *s2)
|
|
|
1690 break;
|
|
|
1691 s1++, s2++;
|
|
|
1692 }
|
|
|
1693
|
|
|
1694 return *s1 - *s2;
|
|
|
1695 }
|
|
|
1696
|
|
|
1697 int
|
|
|
1698 wcsncmp_ascii (const wchar_t *s1, const Ascbyte *s2, Charcount len)
|
|
|
1699 {
|
|
|
1700 while (len--)
|
|
|
1701 {
|
|
|
1702 int diff = *s1 - *s2;
|
|
|
1703 if (diff != 0)
|
|
|
1704 return diff;
|
|
|
1705 if (!*s1)
|
|
|
1706 return 0;
|
|
|
1707 s1++, s2++;
|
|
|
1708 }
|
|
|
1709
|
|
|
1710 return 0;
|
|
|
1711 }
|
|
|
1712
|
|
771
|
1713
|
|
|
1714 /************************************************************************/
|
|
|
1715 /* conversion between textual representations */
|
|
|
1716 /************************************************************************/
|
|
|
1717
|
|
|
1718 /* NOTE: Does not reset the Dynarr. */
|
|
|
1719
|
|
|
1720 void
|
|
867
|
1721 convert_ibyte_string_into_ichar_dynarr (const Ibyte *str, Bytecount len,
|
|
2367
|
1722 Ichar_dynarr *dyn)
|
|
771
|
1723 {
|
|
867
|
1724 const Ibyte *strend = str + len;
|
|
771
|
1725
|
|
|
1726 while (str < strend)
|
|
|
1727 {
|
|
867
|
1728 Ichar ch = itext_ichar (str);
|
|
771
|
1729 Dynarr_add (dyn, ch);
|
|
867
|
1730 INC_IBYTEPTR (str);
|
|
771
|
1731 }
|
|
|
1732 }
|
|
|
1733
|
|
|
1734 Charcount
|
|
867
|
1735 convert_ibyte_string_into_ichar_string (const Ibyte *str, Bytecount len,
|
|
2367
|
1736 Ichar *arr)
|
|
771
|
1737 {
|
|
867
|
1738 const Ibyte *strend = str + len;
|
|
771
|
1739 Charcount newlen = 0;
|
|
|
1740 while (str < strend)
|
|
|
1741 {
|
|
867
|
1742 Ichar ch = itext_ichar (str);
|
|
771
|
1743 arr[newlen++] = ch;
|
|
867
|
1744 INC_IBYTEPTR (str);
|
|
771
|
1745 }
|
|
|
1746 return newlen;
|
|
|
1747 }
|
|
|
1748
|
|
867
|
1749 /* Convert an array of Ichars into the equivalent string representation.
|
|
|
1750 Store into the given Ibyte dynarr. Does not reset the dynarr.
|
|
771
|
1751 Does not add a terminating zero. */
|
|
|
1752
|
|
|
1753 void
|
|
867
|
1754 convert_ichar_string_into_ibyte_dynarr (Ichar *arr, int nels,
|
|
|
1755 Ibyte_dynarr *dyn)
|
|
771
|
1756 {
|
|
867
|
1757 Ibyte str[MAX_ICHAR_LEN];
|
|
771
|
1758 int i;
|
|
|
1759
|
|
|
1760 for (i = 0; i < nels; i++)
|
|
|
1761 {
|
|
867
|
1762 Bytecount len = set_itext_ichar (str, arr[i]);
|
|
771
|
1763 Dynarr_add_many (dyn, str, len);
|
|
|
1764 }
|
|
|
1765 }
|
|
|
1766
|
|
867
|
1767 /* Convert an array of Ichars into the equivalent string representation.
|
|
771
|
1768 Malloc the space needed for this and return it. If LEN_OUT is not a
|
|
867
|
1769 NULL pointer, store into LEN_OUT the number of Ibytes in the
|
|
|
1770 malloc()ed string. Note that the actual number of Ibytes allocated
|
|
771
|
1771 is one more than this: the returned string is zero-terminated. */
|
|
|
1772
|
|
867
|
1773 Ibyte *
|
|
|
1774 convert_ichar_string_into_malloced_string (Ichar *arr, int nels,
|
|
826
|
1775 Bytecount *len_out)
|
|
771
|
1776 {
|
|
|
1777 /* Damn zero-termination. */
|
|
2367
|
1778 Ibyte *str = alloca_ibytes (nels * MAX_ICHAR_LEN + 1);
|
|
867
|
1779 Ibyte *strorig = str;
|
|
771
|
1780 Bytecount len;
|
|
|
1781
|
|
|
1782 int i;
|
|
|
1783
|
|
|
1784 for (i = 0; i < nels; i++)
|
|
867
|
1785 str += set_itext_ichar (str, arr[i]);
|
|
771
|
1786 *str = '\0';
|
|
|
1787 len = str - strorig;
|
|
2367
|
1788 str = xnew_ibytes (1 + len);
|
|
771
|
1789 memcpy (str, strorig, 1 + len);
|
|
|
1790 if (len_out)
|
|
|
1791 *len_out = len;
|
|
|
1792 return str;
|
|
|
1793 }
|
|
|
1794
|
|
826
|
1795 #define COPY_TEXT_BETWEEN_FORMATS(srcfmt, dstfmt) \
|
|
|
1796 do \
|
|
|
1797 { \
|
|
|
1798 if (dst) \
|
|
|
1799 { \
|
|
867
|
1800 Ibyte *dstend = dst + dstlen; \
|
|
|
1801 Ibyte *dstp = dst; \
|
|
|
1802 const Ibyte *srcend = src + srclen; \
|
|
|
1803 const Ibyte *srcp = src; \
|
|
826
|
1804 \
|
|
|
1805 while (srcp < srcend) \
|
|
|
1806 { \
|
|
867
|
1807 Ichar ch = itext_ichar_fmt (srcp, srcfmt, srcobj); \
|
|
|
1808 Bytecount len = ichar_len_fmt (ch, dstfmt); \
|
|
826
|
1809 \
|
|
|
1810 if (dstp + len <= dstend) \
|
|
|
1811 { \
|
|
867
|
1812 set_itext_ichar_fmt (dstp, ch, dstfmt, dstobj); \
|
|
826
|
1813 dstp += len; \
|
|
|
1814 } \
|
|
|
1815 else \
|
|
|
1816 break; \
|
|
867
|
1817 INC_IBYTEPTR_FMT (srcp, srcfmt); \
|
|
826
|
1818 } \
|
|
|
1819 text_checking_assert (srcp <= srcend); \
|
|
|
1820 if (src_used) \
|
|
|
1821 *src_used = srcp - src; \
|
|
|
1822 return dstp - dst; \
|
|
|
1823 } \
|
|
|
1824 else \
|
|
|
1825 { \
|
|
867
|
1826 const Ibyte *srcend = src + srclen; \
|
|
|
1827 const Ibyte *srcp = src; \
|
|
826
|
1828 Bytecount total = 0; \
|
|
|
1829 \
|
|
|
1830 while (srcp < srcend) \
|
|
|
1831 { \
|
|
867
|
1832 total += ichar_len_fmt (itext_ichar_fmt (srcp, srcfmt, \
|
|
826
|
1833 srcobj), dstfmt); \
|
|
867
|
1834 INC_IBYTEPTR_FMT (srcp, srcfmt); \
|
|
826
|
1835 } \
|
|
|
1836 text_checking_assert (srcp == srcend); \
|
|
|
1837 if (src_used) \
|
|
|
1838 *src_used = srcp - src; \
|
|
|
1839 return total; \
|
|
|
1840 } \
|
|
|
1841 } \
|
|
|
1842 while (0)
|
|
|
1843
|
|
|
1844 /* Copy as much text from SRC/SRCLEN to DST/DSTLEN as will fit, converting
|
|
|
1845 from SRCFMT/SRCOBJ to DSTFMT/DSTOBJ. Return number of bytes stored into
|
|
|
1846 DST as return value, and number of bytes copied from SRC through
|
|
|
1847 SRC_USED (if not NULL). If DST is NULL, don't actually store anything
|
|
|
1848 and just return the size needed to store all the text. Will not copy
|
|
|
1849 partial characters into DST. */
|
|
|
1850
|
|
|
1851 Bytecount
|
|
867
|
1852 copy_text_between_formats (const Ibyte *src, Bytecount srclen,
|
|
826
|
1853 Internal_Format srcfmt,
|
|
2333
|
1854 Lisp_Object USED_IF_MULE (srcobj),
|
|
867
|
1855 Ibyte *dst, Bytecount dstlen,
|
|
826
|
1856 Internal_Format dstfmt,
|
|
2333
|
1857 Lisp_Object USED_IF_MULE (dstobj),
|
|
826
|
1858 Bytecount *src_used)
|
|
|
1859 {
|
|
|
1860 if (srcfmt == dstfmt &&
|
|
|
1861 objects_have_same_internal_representation (srcobj, dstobj))
|
|
|
1862 {
|
|
|
1863 if (dst)
|
|
|
1864 {
|
|
|
1865 srclen = min (srclen, dstlen);
|
|
867
|
1866 srclen = validate_ibyte_string_backward (src, srclen);
|
|
826
|
1867 memcpy (dst, src, srclen);
|
|
|
1868 if (src_used)
|
|
|
1869 *src_used = srclen;
|
|
|
1870 return srclen;
|
|
|
1871 }
|
|
|
1872 else
|
|
|
1873 return srclen;
|
|
|
1874 }
|
|
|
1875 /* Everything before the final else statement is an optimization.
|
|
|
1876 The inner loops inside COPY_TEXT_BETWEEN_FORMATS() have a number
|
|
|
1877 of calls to *_fmt(), each of which has a switch statement in it.
|
|
|
1878 By using constants as the FMT argument, these switch statements
|
|
|
1879 will be optimized out of existence. */
|
|
|
1880 #define ELSE_FORMATS(fmt1, fmt2) \
|
|
|
1881 else if (srcfmt == fmt1 && dstfmt == fmt2) \
|
|
|
1882 COPY_TEXT_BETWEEN_FORMATS (fmt1, fmt2)
|
|
|
1883 ELSE_FORMATS (FORMAT_DEFAULT, FORMAT_8_BIT_FIXED);
|
|
|
1884 ELSE_FORMATS (FORMAT_8_BIT_FIXED, FORMAT_DEFAULT);
|
|
|
1885 ELSE_FORMATS (FORMAT_DEFAULT, FORMAT_32_BIT_FIXED);
|
|
|
1886 ELSE_FORMATS (FORMAT_32_BIT_FIXED, FORMAT_DEFAULT);
|
|
|
1887 else
|
|
|
1888 COPY_TEXT_BETWEEN_FORMATS (srcfmt, dstfmt);
|
|
|
1889 #undef ELSE_FORMATS
|
|
|
1890 }
|
|
|
1891
|
|
|
1892 /* Copy as much buffer text in BUF, starting at POS, of length LEN, as will
|
|
|
1893 fit into DST/DSTLEN, converting to DSTFMT. Return number of bytes
|
|
|
1894 stored into DST as return value, and number of bytes copied from BUF
|
|
|
1895 through SRC_USED (if not NULL). If DST is NULL, don't actually store
|
|
|
1896 anything and just return the size needed to store all the text. */
|
|
|
1897
|
|
|
1898 Bytecount
|
|
|
1899 copy_buffer_text_out (struct buffer *buf, Bytebpos pos,
|
|
867
|
1900 Bytecount len, Ibyte *dst, Bytecount dstlen,
|
|
826
|
1901 Internal_Format dstfmt, Lisp_Object dstobj,
|
|
|
1902 Bytecount *src_used)
|
|
|
1903 {
|
|
|
1904 Bytecount dst_used = 0;
|
|
|
1905 if (src_used)
|
|
|
1906 *src_used = 0;
|
|
|
1907
|
|
|
1908 {
|
|
|
1909 BUFFER_TEXT_LOOP (buf, pos, len, runptr, runlen)
|
|
|
1910 {
|
|
|
1911 Bytecount the_src_used, the_dst_used;
|
|
|
1912
|
|
|
1913 the_dst_used = copy_text_between_formats (runptr, runlen,
|
|
|
1914 BUF_FORMAT (buf),
|
|
|
1915 wrap_buffer (buf),
|
|
|
1916 dst, dstlen, dstfmt,
|
|
|
1917 dstobj, &the_src_used);
|
|
|
1918 dst_used += the_dst_used;
|
|
|
1919 if (src_used)
|
|
|
1920 *src_used += the_src_used;
|
|
|
1921 if (dst)
|
|
|
1922 {
|
|
|
1923 dst += the_dst_used;
|
|
|
1924 dstlen -= the_dst_used;
|
|
841
|
1925 /* Stop if we didn't use all of the source text. Also stop
|
|
|
1926 if the destination is full. We need the first test because
|
|
|
1927 there might be a couple bytes left in the destination, but
|
|
|
1928 not enough to fit a full character. The first test will in
|
|
|
1929 fact catch the vast majority of cases where the destination
|
|
|
1930 is empty, too -- but in case the destination holds *exactly*
|
|
|
1931 the run length, we put in the second check. (It shouldn't
|
|
|
1932 really matter though -- next time through we'll just get a
|
|
|
1933 0.) */
|
|
|
1934 if (the_src_used < runlen || !dstlen)
|
|
826
|
1935 break;
|
|
|
1936 }
|
|
|
1937 }
|
|
|
1938 }
|
|
|
1939
|
|
|
1940 return dst_used;
|
|
|
1941 }
|
|
|
1942
|
|
771
|
1943
|
|
|
1944 /************************************************************************/
|
|
|
1945 /* charset properties of strings */
|
|
|
1946 /************************************************************************/
|
|
|
1947
|
|
|
1948 void
|
|
2333
|
1949 find_charsets_in_ibyte_string (unsigned char *charsets,
|
|
|
1950 const Ibyte *USED_IF_MULE (str),
|
|
|
1951 Bytecount USED_IF_MULE (len))
|
|
771
|
1952 {
|
|
|
1953 #ifndef MULE
|
|
|
1954 /* Telescope this. */
|
|
|
1955 charsets[0] = 1;
|
|
|
1956 #else
|
|
867
|
1957 const Ibyte *strend = str + len;
|
|
771
|
1958 memset (charsets, 0, NUM_LEADING_BYTES);
|
|
|
1959
|
|
|
1960 /* #### SJT doesn't like this. */
|
|
|
1961 if (len == 0)
|
|
|
1962 {
|
|
|
1963 charsets[XCHARSET_LEADING_BYTE (Vcharset_ascii) - MIN_LEADING_BYTE] = 1;
|
|
|
1964 return;
|
|
|
1965 }
|
|
|
1966
|
|
|
1967 while (str < strend)
|
|
|
1968 {
|
|
867
|
1969 charsets[ichar_leading_byte (itext_ichar (str)) - MIN_LEADING_BYTE] =
|
|
771
|
1970 1;
|
|
867
|
1971 INC_IBYTEPTR (str);
|
|
771
|
1972 }
|
|
|
1973 #endif
|
|
|
1974 }
|
|
|
1975
|
|
|
1976 void
|
|
2333
|
1977 find_charsets_in_ichar_string (unsigned char *charsets,
|
|
|
1978 const Ichar *USED_IF_MULE (str),
|
|
|
1979 Charcount USED_IF_MULE (len))
|
|
771
|
1980 {
|
|
|
1981 #ifndef MULE
|
|
|
1982 /* Telescope this. */
|
|
|
1983 charsets[0] = 1;
|
|
|
1984 #else
|
|
|
1985 int i;
|
|
|
1986
|
|
|
1987 memset (charsets, 0, NUM_LEADING_BYTES);
|
|
|
1988
|
|
|
1989 /* #### SJT doesn't like this. */
|
|
|
1990 if (len == 0)
|
|
|
1991 {
|
|
|
1992 charsets[XCHARSET_LEADING_BYTE (Vcharset_ascii) - MIN_LEADING_BYTE] = 1;
|
|
|
1993 return;
|
|
|
1994 }
|
|
|
1995
|
|
|
1996 for (i = 0; i < len; i++)
|
|
|
1997 {
|
|
867
|
1998 charsets[ichar_leading_byte (str[i]) - MIN_LEADING_BYTE] = 1;
|
|
771
|
1999 }
|
|
|
2000 #endif
|
|
|
2001 }
|
|
|
2002
|
|
|
2003 int
|
|
867
|
2004 ibyte_string_displayed_columns (const Ibyte *str, Bytecount len)
|
|
771
|
2005 {
|
|
|
2006 int cols = 0;
|
|
867
|
2007 const Ibyte *end = str + len;
|
|
771
|
2008
|
|
|
2009 while (str < end)
|
|
|
2010 {
|
|
|
2011 #ifdef MULE
|
|
867
|
2012 Ichar ch = itext_ichar (str);
|
|
|
2013 cols += XCHARSET_COLUMNS (ichar_charset (ch));
|
|
771
|
2014 #else
|
|
|
2015 cols++;
|
|
|
2016 #endif
|
|
867
|
2017 INC_IBYTEPTR (str);
|
|
771
|
2018 }
|
|
|
2019
|
|
|
2020 return cols;
|
|
|
2021 }
|
|
|
2022
|
|
|
2023 int
|
|
2333
|
2024 ichar_string_displayed_columns (const Ichar *USED_IF_MULE (str), Charcount len)
|
|
771
|
2025 {
|
|
|
2026 #ifdef MULE
|
|
|
2027 int cols = 0;
|
|
|
2028 int i;
|
|
|
2029
|
|
|
2030 for (i = 0; i < len; i++)
|
|
867
|
2031 cols += XCHARSET_COLUMNS (ichar_charset (str[i]));
|
|
771
|
2032
|
|
|
2033 return cols;
|
|
|
2034 #else /* not MULE */
|
|
|
2035 return len;
|
|
|
2036 #endif
|
|
|
2037 }
|
|
|
2038
|
|
|
2039 Charcount
|
|
2333
|
2040 ibyte_string_nonascii_chars (const Ibyte *USED_IF_MULE (str),
|
|
|
2041 Bytecount USED_IF_MULE (len))
|
|
771
|
2042 {
|
|
|
2043 #ifdef MULE
|
|
867
|
2044 const Ibyte *end = str + len;
|
|
771
|
2045 Charcount retval = 0;
|
|
|
2046
|
|
|
2047 while (str < end)
|
|
|
2048 {
|
|
826
|
2049 if (!byte_ascii_p (*str))
|
|
771
|
2050 retval++;
|
|
867
|
2051 INC_IBYTEPTR (str);
|
|
771
|
2052 }
|
|
|
2053
|
|
|
2054 return retval;
|
|
|
2055 #else
|
|
|
2056 return 0;
|
|
|
2057 #endif
|
|
|
2058 }
|
|
|
2059
|
|
|
2060
|
|
|
2061 /***************************************************************************/
|
|
|
2062 /* Eistring helper functions */
|
|
|
2063 /***************************************************************************/
|
|
|
2064
|
|
|
2065 int
|
|
867
|
2066 eistr_casefiddle_1 (Ibyte *olddata, Bytecount len, Ibyte *newdata,
|
|
771
|
2067 int downp)
|
|
|
2068 {
|
|
867
|
2069 Ibyte *endp = olddata + len;
|
|
|
2070 Ibyte *newp = newdata;
|
|
771
|
2071 int changedp = 0;
|
|
|
2072
|
|
|
2073 while (olddata < endp)
|
|
|
2074 {
|
|
867
|
2075 Ichar c = itext_ichar (olddata);
|
|
|
2076 Ichar newc;
|
|
771
|
2077
|
|
|
2078 if (downp)
|
|
|
2079 newc = DOWNCASE (0, c);
|
|
|
2080 else
|
|
|
2081 newc = UPCASE (0, c);
|
|
|
2082
|
|
|
2083 if (c != newc)
|
|
|
2084 changedp = 1;
|
|
|
2085
|
|
867
|
2086 newp += set_itext_ichar (newp, newc);
|
|
|
2087 INC_IBYTEPTR (olddata);
|
|
771
|
2088 }
|
|
|
2089
|
|
|
2090 *newp = '\0';
|
|
|
2091
|
|
|
2092 return changedp ? newp - newdata : 0;
|
|
|
2093 }
|
|
|
2094
|
|
|
2095 int
|
|
|
2096 eifind_large_enough_buffer (int oldbufsize, int needed_size)
|
|
|
2097 {
|
|
|
2098 while (oldbufsize < needed_size)
|
|
|
2099 {
|
|
|
2100 oldbufsize = oldbufsize * 3 / 2;
|
|
|
2101 oldbufsize = max (oldbufsize, 32);
|
|
|
2102 }
|
|
|
2103
|
|
|
2104 return oldbufsize;
|
|
|
2105 }
|
|
|
2106
|
|
|
2107 void
|
|
|
2108 eito_malloc_1 (Eistring *ei)
|
|
|
2109 {
|
|
|
2110 if (ei->mallocp_)
|
|
|
2111 return;
|
|
|
2112 ei->mallocp_ = 1;
|
|
|
2113 if (ei->data_)
|
|
|
2114 {
|
|
867
|
2115 Ibyte *newdata;
|
|
771
|
2116
|
|
|
2117 ei->max_size_allocated_ =
|
|
|
2118 eifind_large_enough_buffer (0, ei->bytelen_ + 1);
|
|
2367
|
2119 newdata = xnew_ibytes (ei->max_size_allocated_);
|
|
771
|
2120 memcpy (newdata, ei->data_, ei->bytelen_ + 1);
|
|
|
2121 ei->data_ = newdata;
|
|
|
2122 }
|
|
|
2123
|
|
|
2124 if (ei->extdata_)
|
|
|
2125 {
|
|
2367
|
2126 Extbyte *newdata = xnew_extbytes (ei->extlen_ + 2);
|
|
771
|
2127
|
|
|
2128 memcpy (newdata, ei->extdata_, ei->extlen_);
|
|
|
2129 /* Double null-terminate in case of Unicode data */
|
|
|
2130 newdata[ei->extlen_] = '\0';
|
|
|
2131 newdata[ei->extlen_ + 1] = '\0';
|
|
|
2132 ei->extdata_ = newdata;
|
|
|
2133 }
|
|
|
2134 }
|
|
|
2135
|
|
|
2136 int
|
|
|
2137 eicmp_1 (Eistring *ei, Bytecount off, Charcount charoff,
|
|
867
|
2138 Bytecount len, Charcount charlen, const Ibyte *data,
|
|
2421
|
2139 const Eistring *ei2, int is_ascii, int fold_case)
|
|
771
|
2140 {
|
|
|
2141 assert ((off < 0) != (charoff < 0));
|
|
|
2142 if (off < 0)
|
|
|
2143 {
|
|
|
2144 off = charcount_to_bytecount (ei->data_, charoff);
|
|
|
2145 if (charlen < 0)
|
|
|
2146 len = -1;
|
|
|
2147 else
|
|
|
2148 len = charcount_to_bytecount (ei->data_ + off, charlen);
|
|
|
2149 }
|
|
|
2150 if (len < 0)
|
|
|
2151 len = ei->bytelen_ - off;
|
|
|
2152
|
|
|
2153 assert (off >= 0 && off <= ei->bytelen_);
|
|
|
2154 assert (len >= 0 && off + len <= ei->bytelen_);
|
|
|
2155 assert ((data == 0) != (ei == 0));
|
|
2421
|
2156 assert ((is_ascii != 0) == (data != 0));
|
|
771
|
2157 assert (fold_case >= 0 && fold_case <= 2);
|
|
|
2158
|
|
|
2159 {
|
|
|
2160 Bytecount dstlen;
|
|
867
|
2161 const Ibyte *src = ei->data_, *dst;
|
|
771
|
2162
|
|
|
2163 if (data)
|
|
|
2164 {
|
|
|
2165 dst = data;
|
|
|
2166 dstlen = qxestrlen (data);
|
|
|
2167 }
|
|
|
2168 else
|
|
|
2169 {
|
|
|
2170 dst = ei2->data_;
|
|
|
2171 dstlen = ei2->bytelen_;
|
|
|
2172 }
|
|
|
2173
|
|
2421
|
2174 if (is_ascii)
|
|
2367
|
2175 ASSERT_ASCTEXT_ASCII_LEN ((Ascbyte *) dst, dstlen);
|
|
771
|
2176
|
|
801
|
2177 return (fold_case == 0 ? qxememcmp4 (src, len, dst, dstlen) :
|
|
|
2178 fold_case == 1 ? qxememcasecmp4 (src, len, dst, dstlen) :
|
|
|
2179 qxetextcasecmp (src, len, dst, dstlen));
|
|
771
|
2180 }
|
|
|
2181 }
|
|
|
2182
|
|
867
|
2183 Ibyte *
|
|
826
|
2184 eicpyout_malloc_fmt (Eistring *eistr, Bytecount *len_out, Internal_Format fmt,
|
|
2286
|
2185 Lisp_Object UNUSED (object))
|
|
771
|
2186 {
|
|
867
|
2187 Ibyte *ptr;
|
|
771
|
2188
|
|
|
2189 assert (fmt == FORMAT_DEFAULT);
|
|
867
|
2190 ptr = xnew_array (Ibyte, eistr->bytelen_ + 1);
|
|
771
|
2191 if (len_out)
|
|
|
2192 *len_out = eistr->bytelen_;
|
|
|
2193 memcpy (ptr, eistr->data_, eistr->bytelen_ + 1);
|
|
|
2194 return ptr;
|
|
|
2195 }
|
|
|
2196
|
|
|
2197
|
|
|
2198 /************************************************************************/
|
|
|
2199 /* Charcount/Bytecount conversion */
|
|
|
2200 /************************************************************************/
|
|
|
2201
|
|
|
2202 /* Optimization. Do it. Live it. Love it. */
|
|
|
2203
|
|
|
2204 #ifdef MULE
|
|
|
2205
|
|
826
|
2206 #ifdef EFFICIENT_INT_128_BIT
|
|
|
2207 # define STRIDE_TYPE INT_128_BIT
|
|
|
2208 # define HIGH_BIT_MASK \
|
|
|
2209 MAKE_128_BIT_UNSIGNED_CONSTANT (0x80808080808080808080808080808080)
|
|
|
2210 #elif defined (EFFICIENT_INT_64_BIT)
|
|
|
2211 # define STRIDE_TYPE INT_64_BIT
|
|
|
2212 # define HIGH_BIT_MASK MAKE_64_BIT_UNSIGNED_CONSTANT (0x8080808080808080)
|
|
771
|
2213 #else
|
|
826
|
2214 # define STRIDE_TYPE INT_32_BIT
|
|
|
2215 # define HIGH_BIT_MASK MAKE_32_BIT_UNSIGNED_CONSTANT (0x80808080)
|
|
771
|
2216 #endif
|
|
|
2217
|
|
|
2218 #define ALIGN_BITS ((EMACS_UINT) (ALIGNOF (STRIDE_TYPE) - 1))
|
|
|
2219 #define ALIGN_MASK (~ ALIGN_BITS)
|
|
|
2220 #define ALIGNED(ptr) ((((EMACS_UINT) ptr) & ALIGN_BITS) == 0)
|
|
|
2221 #define STRIDE sizeof (STRIDE_TYPE)
|
|
|
2222
|
|
2367
|
2223 /* Skip as many ASCII bytes as possible in the memory block [PTR, END).
|
|
|
2224 Return pointer to the first non-ASCII byte. optimized for long
|
|
|
2225 stretches of ASCII. */
|
|
|
2226 inline static const Ibyte *
|
|
|
2227 skip_ascii (const Ibyte *ptr, const Ibyte *end)
|
|
|
2228 {
|
|
826
|
2229 const unsigned STRIDE_TYPE *ascii_end;
|
|
|
2230
|
|
|
2231 /* Need to do in 3 sections -- before alignment start, aligned chunk,
|
|
|
2232 after alignment end. */
|
|
|
2233 while (!ALIGNED (ptr))
|
|
771
|
2234 {
|
|
826
|
2235 if (ptr == end || !byte_ascii_p (*ptr))
|
|
|
2236 return ptr;
|
|
|
2237 ptr++;
|
|
|
2238 }
|
|
|
2239 ascii_end = (const unsigned STRIDE_TYPE *) ptr;
|
|
|
2240 /* This loop screams, because we can detect ASCII
|
|
|
2241 characters 4 or 8 at a time. */
|
|
867
|
2242 while ((const Ibyte *) ascii_end + STRIDE <= end
|
|
826
|
2243 && !(*ascii_end & HIGH_BIT_MASK))
|
|
|
2244 ascii_end++;
|
|
867
|
2245 ptr = (Ibyte *) ascii_end;
|
|
826
|
2246 while (ptr < end && byte_ascii_p (*ptr))
|
|
|
2247 ptr++;
|
|
|
2248 return ptr;
|
|
|
2249 }
|
|
|
2250
|
|
2367
|
2251 /* Skip as many ASCII bytes as possible in the memory block [END, PTR),
|
|
|
2252 going downwards. Return pointer to the location above the first
|
|
|
2253 non-ASCII byte. Optimized for long stretches of ASCII. */
|
|
|
2254 inline static const Ibyte *
|
|
|
2255 skip_ascii_down (const Ibyte *ptr, const Ibyte *end)
|
|
|
2256 {
|
|
|
2257 const unsigned STRIDE_TYPE *ascii_end;
|
|
|
2258
|
|
|
2259 /* Need to do in 3 sections -- before alignment start, aligned chunk,
|
|
|
2260 after alignment end. */
|
|
|
2261 while (!ALIGNED (ptr))
|
|
|
2262 {
|
|
|
2263 if (ptr == end || !byte_ascii_p (*(ptr - 1)))
|
|
|
2264 return ptr;
|
|
|
2265 ptr--;
|
|
|
2266 }
|
|
|
2267 ascii_end = (const unsigned STRIDE_TYPE *) ptr - 1;
|
|
|
2268 /* This loop screams, because we can detect ASCII
|
|
|
2269 characters 4 or 8 at a time. */
|
|
|
2270 while ((const Ibyte *) ascii_end >= end
|
|
|
2271 && !(*ascii_end & HIGH_BIT_MASK))
|
|
|
2272 ascii_end--;
|
|
|
2273 ptr = (Ibyte *) (ascii_end + 1);
|
|
|
2274 while (ptr > end && byte_ascii_p (*(ptr - 1)))
|
|
|
2275 ptr--;
|
|
|
2276 return ptr;
|
|
|
2277 }
|
|
|
2278
|
|
826
|
2279 /* Function equivalents of bytecount_to_charcount/charcount_to_bytecount.
|
|
|
2280 These work on strings of all sizes but are more efficient than a simple
|
|
|
2281 loop on large strings and probably less efficient on sufficiently small
|
|
|
2282 strings. */
|
|
|
2283
|
|
|
2284 Charcount
|
|
867
|
2285 bytecount_to_charcount_fun (const Ibyte *ptr, Bytecount len)
|
|
826
|
2286 {
|
|
|
2287 Charcount count = 0;
|
|
867
|
2288 const Ibyte *end = ptr + len;
|
|
826
|
2289 while (1)
|
|
|
2290 {
|
|
867
|
2291 const Ibyte *newptr = skip_ascii (ptr, end);
|
|
826
|
2292 count += newptr - ptr;
|
|
|
2293 ptr = newptr;
|
|
|
2294 if (ptr == end)
|
|
|
2295 break;
|
|
|
2296 {
|
|
|
2297 /* Optimize for successive characters from the same charset */
|
|
867
|
2298 Ibyte leading_byte = *ptr;
|
|
826
|
2299 int bytes = rep_bytes_by_first_byte (leading_byte);
|
|
|
2300 while (ptr < end && *ptr == leading_byte)
|
|
|
2301 ptr += bytes, count++;
|
|
|
2302 }
|
|
771
|
2303 }
|
|
|
2304
|
|
|
2305 /* Bomb out if the specified substring ends in the middle
|
|
|
2306 of a character. Note that we might have already gotten
|
|
|
2307 a core dump above from an invalid reference, but at least
|
|
|
2308 we will get no farther than here.
|
|
|
2309
|
|
|
2310 This also catches len < 0. */
|
|
800
|
2311 text_checking_assert (ptr == end);
|
|
771
|
2312
|
|
|
2313 return count;
|
|
|
2314 }
|
|
|
2315
|
|
|
2316 Bytecount
|
|
867
|
2317 charcount_to_bytecount_fun (const Ibyte *ptr, Charcount len)
|
|
771
|
2318 {
|
|
867
|
2319 const Ibyte *newptr = ptr;
|
|
826
|
2320 while (1)
|
|
771
|
2321 {
|
|
867
|
2322 const Ibyte *newnewptr = skip_ascii (newptr, newptr + len);
|
|
826
|
2323 len -= newnewptr - newptr;
|
|
|
2324 newptr = newnewptr;
|
|
|
2325 if (!len)
|
|
|
2326 break;
|
|
|
2327 {
|
|
|
2328 /* Optimize for successive characters from the same charset */
|
|
867
|
2329 Ibyte leading_byte = *newptr;
|
|
826
|
2330 int bytes = rep_bytes_by_first_byte (leading_byte);
|
|
|
2331 while (len > 0 && *newptr == leading_byte)
|
|
|
2332 newptr += bytes, len--;
|
|
|
2333 }
|
|
771
|
2334 }
|
|
|
2335 return newptr - ptr;
|
|
|
2336 }
|
|
|
2337
|
|
2367
|
2338 /* Function equivalent of charcount_to_bytecount_down. This works on strings
|
|
|
2339 of all sizes but is more efficient than a simple loop on large strings
|
|
|
2340 and probably less efficient on sufficiently small strings. */
|
|
|
2341
|
|
|
2342 Bytecount
|
|
|
2343 charcount_to_bytecount_down_fun (const Ibyte *ptr, Charcount len)
|
|
|
2344 {
|
|
|
2345 const Ibyte *newptr = ptr;
|
|
|
2346 while (1)
|
|
|
2347 {
|
|
|
2348 const Ibyte *newnewptr = skip_ascii_down (newptr, newptr - len);
|
|
|
2349 len -= newptr - newnewptr;
|
|
|
2350 newptr = newnewptr;
|
|
|
2351 /* Skip over all non-ASCII chars, counting the length and
|
|
|
2352 stopping if it's zero */
|
|
|
2353 while (len && !byte_ascii_p (*(newptr - 1)))
|
|
|
2354 if (ibyte_first_byte_p (*--newptr))
|
|
|
2355 len--;
|
|
|
2356 if (!len)
|
|
|
2357 break;
|
|
|
2358 }
|
|
|
2359 text_checking_assert (ptr - newptr >= 0);
|
|
|
2360 return ptr - newptr;
|
|
|
2361 }
|
|
|
2362
|
|
771
|
2363 /* The next two functions are the actual meat behind the
|
|
|
2364 charbpos-to-bytebpos and bytebpos-to-charbpos conversions. Currently
|
|
|
2365 the method they use is fairly unsophisticated; see buffer.h.
|
|
|
2366
|
|
|
2367 Note that charbpos_to_bytebpos_func() is probably the most-called
|
|
|
2368 function in all of XEmacs. Therefore, it must be FAST FAST FAST.
|
|
|
2369 This is the reason why so much of the code is duplicated.
|
|
|
2370
|
|
|
2371 Similar considerations apply to bytebpos_to_charbpos_func(), although
|
|
|
2372 less so because the function is not called so often.
|
|
2367
|
2373 */
|
|
|
2374
|
|
|
2375 /*
|
|
|
2376
|
|
|
2377 Info on Byte-Char conversion:
|
|
|
2378
|
|
|
2379 (Info-goto-node "(internals)Byte-Char Position Conversion")
|
|
|
2380 */
|
|
|
2381
|
|
|
2382 #ifdef OLD_BYTE_CHAR
|
|
771
|
2383 static int not_very_random_number;
|
|
2367
|
2384 #endif /* OLD_BYTE_CHAR */
|
|
|
2385
|
|
|
2386 #define OLD_LOOP
|
|
|
2387
|
|
|
2388 /* If we are this many characters away from any known position, cache the
|
|
|
2389 new position in the buffer's char-byte cache. */
|
|
|
2390 #define FAR_AWAY_DISTANCE 5000
|
|
|
2391
|
|
|
2392 /* Converting between character positions and byte positions. */
|
|
|
2393
|
|
|
2394 /* There are several places in the buffer where we know
|
|
|
2395 the correspondence: BEG, BEGV, PT, GPT, ZV and Z,
|
|
|
2396 and everywhere there is a marker. So we find the one of these places
|
|
|
2397 that is closest to the specified position, and scan from there. */
|
|
|
2398
|
|
|
2399 /* This macro is a subroutine of charbpos_to_bytebpos_func.
|
|
|
2400 Note that it is desirable that BYTEPOS is not evaluated
|
|
|
2401 except when we really want its value. */
|
|
|
2402
|
|
|
2403 #define CONSIDER(CHARPOS, BYTEPOS) \
|
|
|
2404 do \
|
|
|
2405 { \
|
|
|
2406 Charbpos this_charpos = (CHARPOS); \
|
|
|
2407 int changed = 0; \
|
|
|
2408 \
|
|
|
2409 if (this_charpos == x) \
|
|
|
2410 { \
|
|
|
2411 retval = (BYTEPOS); \
|
|
|
2412 goto done; \
|
|
|
2413 } \
|
|
|
2414 else if (this_charpos > x) \
|
|
|
2415 { \
|
|
|
2416 if (this_charpos < best_above) \
|
|
|
2417 { \
|
|
|
2418 best_above = this_charpos; \
|
|
|
2419 best_above_byte = (BYTEPOS); \
|
|
|
2420 changed = 1; \
|
|
|
2421 } \
|
|
|
2422 } \
|
|
|
2423 else if (this_charpos > best_below) \
|
|
|
2424 { \
|
|
|
2425 best_below = this_charpos; \
|
|
|
2426 best_below_byte = (BYTEPOS); \
|
|
|
2427 changed = 1; \
|
|
|
2428 } \
|
|
|
2429 \
|
|
|
2430 if (changed) \
|
|
|
2431 { \
|
|
|
2432 if (best_above - best_below == best_above_byte - best_below_byte) \
|
|
|
2433 { \
|
|
|
2434 retval = best_below_byte + (x - best_below); \
|
|
|
2435 goto done; \
|
|
|
2436 } \
|
|
|
2437 } \
|
|
|
2438 } \
|
|
|
2439 while (0)
|
|
|
2440
|
|
771
|
2441
|
|
|
2442 Bytebpos
|
|
|
2443 charbpos_to_bytebpos_func (struct buffer *buf, Charbpos x)
|
|
|
2444 {
|
|
2367
|
2445 #ifdef OLD_BYTE_CHAR
|
|
771
|
2446 Charbpos bufmin;
|
|
|
2447 Charbpos bufmax;
|
|
|
2448 Bytebpos bytmin;
|
|
|
2449 Bytebpos bytmax;
|
|
|
2450 int size;
|
|
|
2451 int forward_p;
|
|
|
2452 int diff_so_far;
|
|
|
2453 int add_to_cache = 0;
|
|
2367
|
2454 #endif /* OLD_BYTE_CHAR */
|
|
|
2455
|
|
|
2456 Charbpos best_above, best_below;
|
|
|
2457 Bytebpos best_above_byte, best_below_byte;
|
|
|
2458 int i;
|
|
|
2459 struct buffer_text *t;
|
|
|
2460 Bytebpos retval;
|
|
|
2461
|
|
1292
|
2462 PROFILE_DECLARE ();
|
|
771
|
2463
|
|
1292
|
2464 PROFILE_RECORD_ENTERING_SECTION (QSin_char_byte_conversion);
|
|
|
2465
|
|
2367
|
2466 best_above = BUF_Z (buf);
|
|
|
2467 best_above_byte = BYTE_BUF_Z (buf);
|
|
|
2468
|
|
|
2469 /* In this case, we simply have all one-byte characters. But this should
|
|
|
2470 have been intercepted before, in charbpos_to_bytebpos(). */
|
|
|
2471 text_checking_assert (best_above != best_above_byte);
|
|
|
2472
|
|
|
2473 best_below = BUF_BEG (buf);
|
|
|
2474 best_below_byte = BYTE_BUF_BEG (buf);
|
|
|
2475
|
|
|
2476 /* We find in best_above and best_above_byte
|
|
|
2477 the closest known point above CHARPOS,
|
|
|
2478 and in best_below and best_below_byte
|
|
|
2479 the closest known point below CHARPOS,
|
|
|
2480
|
|
|
2481 If at any point we can tell that the space between those
|
|
|
2482 two best approximations is all single-byte,
|
|
|
2483 we interpolate the result immediately. */
|
|
|
2484
|
|
|
2485 CONSIDER (BUF_PT (buf), BYTE_BUF_PT (buf));
|
|
|
2486 CONSIDER (BUF_GPT (buf), BYTE_BUF_GPT (buf));
|
|
|
2487 CONSIDER (BUF_BEGV (buf), BYTE_BUF_BEGV (buf));
|
|
|
2488 CONSIDER (BUF_ZV (buf), BYTE_BUF_ZV (buf));
|
|
|
2489
|
|
|
2490 t = buf->text;
|
|
|
2491 CONSIDER (t->cached_charpos, t->cached_bytepos);
|
|
|
2492
|
|
|
2493 /* Check the most recently entered positions first */
|
|
|
2494
|
|
|
2495 for (i = t->next_cache_pos - 1; i >= 0; i--)
|
|
|
2496 {
|
|
|
2497 CONSIDER (t->mule_charbpos_cache[i], t->mule_bytebpos_cache[i]);
|
|
|
2498
|
|
|
2499 /* If we are down to a range of 50 chars,
|
|
|
2500 don't bother checking any other markers;
|
|
|
2501 scan the intervening chars directly now. */
|
|
|
2502 if (best_above - best_below < 50)
|
|
|
2503 break;
|
|
|
2504 }
|
|
|
2505
|
|
|
2506 /* We get here if we did not exactly hit one of the known places.
|
|
|
2507 We have one known above and one known below.
|
|
|
2508 Scan, counting characters, from whichever one is closer. */
|
|
|
2509
|
|
|
2510 if (x - best_below < best_above - x)
|
|
|
2511 {
|
|
|
2512 int record = x - best_below > FAR_AWAY_DISTANCE;
|
|
|
2513
|
|
|
2514 #ifdef OLD_LOOP /* old code */
|
|
|
2515 while (best_below != x)
|
|
|
2516 {
|
|
|
2517 best_below++;
|
|
|
2518 INC_BYTEBPOS (buf, best_below_byte);
|
|
|
2519 }
|
|
|
2520 #else
|
|
|
2521 text_checking_assert (BUF_FORMAT (buf) == FORMAT_DEFAULT);
|
|
|
2522 /* The gap should not occur between best_below and x, or we will be
|
|
|
2523 screwed in using charcount_to_bytecount(). It should not be exactly
|
|
|
2524 at x either, because we already should have caught that. */
|
|
|
2525 text_checking_assert
|
|
|
2526 (BUF_CEILING_OF_IGNORE_ACCESSIBLE (buf, best_below) > x);
|
|
|
2527
|
|
|
2528 /* Using charcount_to_bytecount() is potentially a lot faster than a
|
|
|
2529 simple loop using INC_BYTEBPOS() because (a) the checks for gap
|
|
|
2530 and buffer format are factored out instead of getting checked
|
|
|
2531 every time; (b) the checking goes 4 or 8 bytes at a time in ASCII
|
|
|
2532 text.
|
|
|
2533 */
|
|
|
2534 best_below_byte +=
|
|
|
2535 charcount_to_bytecount
|
|
|
2536 (BYTE_BUF_BYTE_ADDRESS (buf, best_below_byte), x - best_below);
|
|
|
2537 best_below = x;
|
|
|
2538 #endif /* 0 */
|
|
|
2539
|
|
|
2540 /* If this position is quite far from the nearest known position,
|
|
|
2541 cache the correspondence.
|
|
|
2542
|
|
|
2543 NB FSF does this: "... by creating a marker here.
|
|
|
2544 It will last until the next GC."
|
|
|
2545 */
|
|
|
2546
|
|
|
2547 if (record)
|
|
|
2548 {
|
|
|
2549 /* If we have run out of positions to record, discard some of the
|
|
|
2550 old ones. I used to use a circular buffer, which avoids the
|
|
|
2551 need to block-move any memory. But it makes it more difficult
|
|
|
2552 to keep track of which positions haven't been used -- commonly
|
|
|
2553 we haven't yet filled out anywhere near the whole set of
|
|
|
2554 positions and don't want to check them all. We should not be
|
|
|
2555 recording that often, and block-moving is extremely fast in
|
|
|
2556 any case. --ben */
|
|
|
2557 if (t->next_cache_pos == NUM_CACHED_POSITIONS)
|
|
|
2558 {
|
|
|
2559 memmove (t->mule_charbpos_cache,
|
|
|
2560 t->mule_charbpos_cache + NUM_MOVED_POSITIONS,
|
|
|
2561 sizeof (Charbpos) *
|
|
|
2562 (NUM_CACHED_POSITIONS - NUM_MOVED_POSITIONS));
|
|
|
2563 memmove (t->mule_bytebpos_cache,
|
|
|
2564 t->mule_bytebpos_cache + NUM_MOVED_POSITIONS,
|
|
|
2565 sizeof (Bytebpos) *
|
|
|
2566 (NUM_CACHED_POSITIONS - NUM_MOVED_POSITIONS));
|
|
|
2567 t->next_cache_pos -= NUM_MOVED_POSITIONS;
|
|
|
2568 }
|
|
|
2569 t->mule_charbpos_cache[t->next_cache_pos] = best_below;
|
|
|
2570 t->mule_bytebpos_cache[t->next_cache_pos] = best_below_byte;
|
|
|
2571 t->next_cache_pos++;
|
|
|
2572 }
|
|
|
2573
|
|
|
2574 t->cached_charpos = best_below;
|
|
|
2575 t->cached_bytepos = best_below_byte;
|
|
|
2576
|
|
|
2577 retval = best_below_byte;
|
|
|
2578 text_checking_assert (best_below_byte >= best_below);
|
|
|
2579 goto done;
|
|
|
2580 }
|
|
|
2581 else
|
|
|
2582 {
|
|
|
2583 int record = best_above - x > FAR_AWAY_DISTANCE;
|
|
|
2584
|
|
|
2585 #ifdef OLD_LOOP
|
|
|
2586 while (best_above != x)
|
|
|
2587 {
|
|
|
2588 best_above--;
|
|
|
2589 DEC_BYTEBPOS (buf, best_above_byte);
|
|
|
2590 }
|
|
|
2591 #else
|
|
|
2592 text_checking_assert (BUF_FORMAT (buf) == FORMAT_DEFAULT);
|
|
|
2593 /* The gap should not occur between best_above and x, or we will be
|
|
|
2594 screwed in using charcount_to_bytecount_down(). It should not be
|
|
|
2595 exactly at x either, because we already should have caught
|
|
|
2596 that. */
|
|
|
2597 text_checking_assert
|
|
|
2598 (BUF_FLOOR_OF_IGNORE_ACCESSIBLE (buf, best_above) < x);
|
|
|
2599
|
|
|
2600 /* Using charcount_to_bytecount_down() is potentially a lot faster
|
|
|
2601 than a simple loop using DEC_BYTEBPOS(); see above. */
|
|
|
2602 best_above_byte -=
|
|
|
2603 charcount_to_bytecount_down
|
|
|
2604 /* BYTE_BUF_BYTE_ADDRESS will return a value on the high side of the
|
|
|
2605 gap if we are at the gap, which is the wrong side. So do the
|
|
|
2606 following trick instead. */
|
|
|
2607 (BYTE_BUF_BYTE_ADDRESS_BEFORE (buf, best_above_byte) + 1,
|
|
|
2608 best_above - x);
|
|
|
2609 best_above = x;
|
|
|
2610 #endif /* SLEDGEHAMMER_CHECK_TEXT */
|
|
|
2611
|
|
|
2612
|
|
|
2613 /* If this position is quite far from the nearest known position,
|
|
|
2614 cache the correspondence.
|
|
|
2615
|
|
|
2616 NB FSF does this: "... by creating a marker here.
|
|
|
2617 It will last until the next GC."
|
|
|
2618 */
|
|
|
2619 if (record)
|
|
|
2620 {
|
|
|
2621 if (t->next_cache_pos == NUM_CACHED_POSITIONS)
|
|
|
2622 {
|
|
|
2623 memmove (t->mule_charbpos_cache,
|
|
|
2624 t->mule_charbpos_cache + NUM_MOVED_POSITIONS,
|
|
|
2625 sizeof (Charbpos) *
|
|
|
2626 (NUM_CACHED_POSITIONS - NUM_MOVED_POSITIONS));
|
|
|
2627 memmove (t->mule_bytebpos_cache,
|
|
|
2628 t->mule_bytebpos_cache + NUM_MOVED_POSITIONS,
|
|
|
2629 sizeof (Bytebpos) *
|
|
|
2630 (NUM_CACHED_POSITIONS - NUM_MOVED_POSITIONS));
|
|
|
2631 t->next_cache_pos -= NUM_MOVED_POSITIONS;
|
|
|
2632 }
|
|
|
2633 t->mule_charbpos_cache[t->next_cache_pos] = best_above;
|
|
|
2634 t->mule_bytebpos_cache[t->next_cache_pos] = best_above_byte;
|
|
|
2635 t->next_cache_pos++;
|
|
|
2636 }
|
|
|
2637
|
|
|
2638 t->cached_charpos = best_above;
|
|
|
2639 t->cached_bytepos = best_above_byte;
|
|
|
2640
|
|
|
2641 retval = best_above_byte;
|
|
|
2642 text_checking_assert (best_above_byte >= best_above);
|
|
|
2643 goto done;
|
|
|
2644 }
|
|
|
2645
|
|
|
2646 #ifdef OLD_BYTE_CHAR
|
|
|
2647
|
|
771
|
2648 bufmin = buf->text->mule_bufmin;
|
|
|
2649 bufmax = buf->text->mule_bufmax;
|
|
|
2650 bytmin = buf->text->mule_bytmin;
|
|
|
2651 bytmax = buf->text->mule_bytmax;
|
|
|
2652 size = (1 << buf->text->mule_shifter) + !!buf->text->mule_three_p;
|
|
|
2653
|
|
|
2654 /* The basic idea here is that we shift the "known region" up or down
|
|
|
2655 until it overlaps the specified position. We do this by moving
|
|
|
2656 the upper bound of the known region up one character at a time,
|
|
|
2657 and moving the lower bound of the known region up as necessary
|
|
|
2658 when the size of the character just seen changes.
|
|
|
2659
|
|
|
2660 We optimize this, however, by first shifting the known region to
|
|
|
2661 one of the cached points if it's close by. (We don't check BEG or
|
|
|
2662 Z, even though they're cached; most of the time these will be the
|
|
|
2663 same as BEGV and ZV, and when they're not, they're not likely
|
|
|
2664 to be used.) */
|
|
|
2665
|
|
|
2666 if (x > bufmax)
|
|
|
2667 {
|
|
|
2668 Charbpos diffmax = x - bufmax;
|
|
|
2669 Charbpos diffpt = x - BUF_PT (buf);
|
|
|
2670 Charbpos diffzv = BUF_ZV (buf) - x;
|
|
|
2671 /* #### This value could stand some more exploration. */
|
|
|
2672 Charcount heuristic_hack = (bufmax - bufmin) >> 2;
|
|
|
2673
|
|
|
2674 /* Check if the position is closer to PT or ZV than to the
|
|
|
2675 end of the known region. */
|
|
|
2676
|
|
|
2677 if (diffpt < 0)
|
|
|
2678 diffpt = -diffpt;
|
|
|
2679 if (diffzv < 0)
|
|
|
2680 diffzv = -diffzv;
|
|
|
2681
|
|
|
2682 /* But also implement a heuristic that favors the known region
|
|
|
2683 over PT or ZV. The reason for this is that switching to
|
|
|
2684 PT or ZV will wipe out the knowledge in the known region,
|
|
|
2685 which might be annoying if the known region is large and
|
|
|
2686 PT or ZV is not that much closer than the end of the known
|
|
|
2687 region. */
|
|
|
2688
|
|
|
2689 diffzv += heuristic_hack;
|
|
|
2690 diffpt += heuristic_hack;
|
|
|
2691 if (diffpt < diffmax && diffpt <= diffzv)
|
|
|
2692 {
|
|
|
2693 bufmax = bufmin = BUF_PT (buf);
|
|
826
|
2694 bytmax = bytmin = BYTE_BUF_PT (buf);
|
|
771
|
2695 /* We set the size to 1 even though it doesn't really
|
|
|
2696 matter because the new known region contains no
|
|
|
2697 characters. We do this because this is the most
|
|
|
2698 likely size of the characters around the new known
|
|
|
2699 region, and we avoid potential yuckiness that is
|
|
|
2700 done when size == 3. */
|
|
|
2701 size = 1;
|
|
|
2702 }
|
|
|
2703 if (diffzv < diffmax)
|
|
|
2704 {
|
|
|
2705 bufmax = bufmin = BUF_ZV (buf);
|
|
826
|
2706 bytmax = bytmin = BYTE_BUF_ZV (buf);
|
|
771
|
2707 size = 1;
|
|
|
2708 }
|
|
|
2709 }
|
|
800
|
2710 #ifdef ERROR_CHECK_TEXT
|
|
771
|
2711 else if (x >= bufmin)
|
|
2500
|
2712 ABORT ();
|
|
771
|
2713 #endif
|
|
|
2714 else
|
|
|
2715 {
|
|
|
2716 Charbpos diffmin = bufmin - x;
|
|
|
2717 Charbpos diffpt = BUF_PT (buf) - x;
|
|
|
2718 Charbpos diffbegv = x - BUF_BEGV (buf);
|
|
|
2719 /* #### This value could stand some more exploration. */
|
|
|
2720 Charcount heuristic_hack = (bufmax - bufmin) >> 2;
|
|
|
2721
|
|
|
2722 if (diffpt < 0)
|
|
|
2723 diffpt = -diffpt;
|
|
|
2724 if (diffbegv < 0)
|
|
|
2725 diffbegv = -diffbegv;
|
|
|
2726
|
|
|
2727 /* But also implement a heuristic that favors the known region --
|
|
|
2728 see above. */
|
|
|
2729
|
|
|
2730 diffbegv += heuristic_hack;
|
|
|
2731 diffpt += heuristic_hack;
|
|
|
2732
|
|
|
2733 if (diffpt < diffmin && diffpt <= diffbegv)
|
|
|
2734 {
|
|
|
2735 bufmax = bufmin = BUF_PT (buf);
|
|
826
|
2736 bytmax = bytmin = BYTE_BUF_PT (buf);
|
|
771
|
2737 /* We set the size to 1 even though it doesn't really
|
|
|
2738 matter because the new known region contains no
|
|
|
2739 characters. We do this because this is the most
|
|
|
2740 likely size of the characters around the new known
|
|
|
2741 region, and we avoid potential yuckiness that is
|
|
|
2742 done when size == 3. */
|
|
|
2743 size = 1;
|
|
|
2744 }
|
|
|
2745 if (diffbegv < diffmin)
|
|
|
2746 {
|
|
|
2747 bufmax = bufmin = BUF_BEGV (buf);
|
|
826
|
2748 bytmax = bytmin = BYTE_BUF_BEGV (buf);
|
|
771
|
2749 size = 1;
|
|
|
2750 }
|
|
|
2751 }
|
|
|
2752
|
|
|
2753 diff_so_far = x > bufmax ? x - bufmax : bufmin - x;
|
|
|
2754 if (diff_so_far > 50)
|
|
|
2755 {
|
|
|
2756 /* If we have to move more than a certain amount, then look
|
|
|
2757 into our cache. */
|
|
|
2758 int minval = INT_MAX;
|
|
|
2759 int found = 0;
|
|
|
2760 int i;
|
|
|
2761
|
|
|
2762 add_to_cache = 1;
|
|
|
2763 /* I considered keeping the positions ordered. This would speed
|
|
|
2764 up this loop, but updating the cache would take longer, so
|
|
|
2765 it doesn't seem like it would really matter. */
|
|
2367
|
2766 for (i = 0; i < NUM_CACHED_POSITIONS; i++)
|
|
771
|
2767 {
|
|
|
2768 int diff = buf->text->mule_charbpos_cache[i] - x;
|
|
|
2769
|
|
|
2770 if (diff < 0)
|
|
|
2771 diff = -diff;
|
|
|
2772 if (diff < minval)
|
|
|
2773 {
|
|
|
2774 minval = diff;
|
|
|
2775 found = i;
|
|
|
2776 }
|
|
|
2777 }
|
|
|
2778
|
|
|
2779 if (minval < diff_so_far)
|
|
|
2780 {
|
|
|
2781 bufmax = bufmin = buf->text->mule_charbpos_cache[found];
|
|
|
2782 bytmax = bytmin = buf->text->mule_bytebpos_cache[found];
|
|
|
2783 size = 1;
|
|
|
2784 }
|
|
|
2785 }
|
|
|
2786
|
|
|
2787 /* It's conceivable that the caching above could lead to X being
|
|
|
2788 the same as one of the range edges. */
|
|
|
2789 if (x >= bufmax)
|
|
|
2790 {
|
|
|
2791 Bytebpos newmax;
|
|
|
2792 Bytecount newsize;
|
|
|
2793
|
|
|
2794 forward_p = 1;
|
|
|
2795 while (x > bufmax)
|
|
|
2796 {
|
|
|
2797 newmax = bytmax;
|
|
|
2798
|
|
|
2799 INC_BYTEBPOS (buf, newmax);
|
|
|
2800 newsize = newmax - bytmax;
|
|
|
2801 if (newsize != size)
|
|
|
2802 {
|
|
|
2803 bufmin = bufmax;
|
|
|
2804 bytmin = bytmax;
|
|
|
2805 size = newsize;
|
|
|
2806 }
|
|
|
2807 bytmax = newmax;
|
|
|
2808 bufmax++;
|
|
|
2809 }
|
|
|
2810 retval = bytmax;
|
|
|
2811
|
|
|
2812 /* #### Should go past the found location to reduce the number
|
|
|
2813 of times that this function is called */
|
|
|
2814 }
|
|
|
2815 else /* x < bufmin */
|
|
|
2816 {
|
|
|
2817 Bytebpos newmin;
|
|
|
2818 Bytecount newsize;
|
|
|
2819
|
|
|
2820 forward_p = 0;
|
|
|
2821 while (x < bufmin)
|
|
|
2822 {
|
|
|
2823 newmin = bytmin;
|
|
|
2824
|
|
|
2825 DEC_BYTEBPOS (buf, newmin);
|
|
|
2826 newsize = bytmin - newmin;
|
|
|
2827 if (newsize != size)
|
|
|
2828 {
|
|
|
2829 bufmax = bufmin;
|
|
|
2830 bytmax = bytmin;
|
|
|
2831 size = newsize;
|
|
|
2832 }
|
|
|
2833 bytmin = newmin;
|
|
|
2834 bufmin--;
|
|
|
2835 }
|
|
|
2836 retval = bytmin;
|
|
|
2837
|
|
|
2838 /* #### Should go past the found location to reduce the number
|
|
|
2839 of times that this function is called
|
|
|
2840 */
|
|
|
2841 }
|
|
|
2842
|
|
|
2843 /* If size is three, than we have to max sure that the range we
|
|
|
2844 discovered isn't too large, because we use a fixed-length
|
|
|
2845 table to divide by 3. */
|
|
|
2846
|
|
|
2847 if (size == 3)
|
|
|
2848 {
|
|
|
2849 int gap = bytmax - bytmin;
|
|
|
2850 buf->text->mule_three_p = 1;
|
|
|
2851 buf->text->mule_shifter = 1;
|
|
|
2852
|
|
|
2853 if (gap > MAX_BYTEBPOS_GAP_SIZE_3)
|
|
|
2854 {
|
|
|
2855 if (forward_p)
|
|
|
2856 {
|
|
|
2857 bytmin = bytmax - MAX_BYTEBPOS_GAP_SIZE_3;
|
|
|
2858 bufmin = bufmax - MAX_CHARBPOS_GAP_SIZE_3;
|
|
|
2859 }
|
|
|
2860 else
|
|
|
2861 {
|
|
|
2862 bytmax = bytmin + MAX_BYTEBPOS_GAP_SIZE_3;
|
|
|
2863 bufmax = bufmin + MAX_CHARBPOS_GAP_SIZE_3;
|
|
|
2864 }
|
|
|
2865 }
|
|
|
2866 }
|
|
|
2867 else
|
|
|
2868 {
|
|
|
2869 buf->text->mule_three_p = 0;
|
|
|
2870 if (size == 4)
|
|
|
2871 buf->text->mule_shifter = 2;
|
|
|
2872 else
|
|
|
2873 buf->text->mule_shifter = size - 1;
|
|
|
2874 }
|
|
|
2875
|
|
|
2876 buf->text->mule_bufmin = bufmin;
|
|
|
2877 buf->text->mule_bufmax = bufmax;
|
|
|
2878 buf->text->mule_bytmin = bytmin;
|
|
|
2879 buf->text->mule_bytmax = bytmax;
|
|
|
2880
|
|
|
2881 if (add_to_cache)
|
|
|
2882 {
|
|
|
2883 int replace_loc;
|
|
|
2884
|
|
|
2885 /* We throw away a "random" cached value and replace it with
|
|
|
2886 the new value. It doesn't actually have to be very random
|
|
|
2887 at all, just evenly distributed.
|
|
|
2888
|
|
|
2889 #### It would be better to use a least-recently-used algorithm
|
|
|
2890 or something that tries to space things out, but I'm not sure
|
|
|
2891 it's worth it to go to the trouble of maintaining that. */
|
|
|
2892 not_very_random_number += 621;
|
|
|
2893 replace_loc = not_very_random_number & 15;
|
|
|
2894 buf->text->mule_charbpos_cache[replace_loc] = x;
|
|
|
2895 buf->text->mule_bytebpos_cache[replace_loc] = retval;
|
|
|
2896 }
|
|
|
2897
|
|
2367
|
2898 #endif /* OLD_BYTE_CHAR */
|
|
|
2899
|
|
|
2900 done:
|
|
1292
|
2901 PROFILE_RECORD_EXITING_SECTION (QSin_char_byte_conversion);
|
|
|
2902
|
|
771
|
2903 return retval;
|
|
|
2904 }
|
|
|
2905
|
|
2367
|
2906 #undef CONSIDER
|
|
|
2907
|
|
|
2908 /* bytepos_to_charpos returns the char position corresponding to BYTEPOS. */
|
|
|
2909
|
|
|
2910 /* This macro is a subroutine of bytebpos_to_charbpos_func.
|
|
|
2911 It is used when BYTEPOS is actually the byte position. */
|
|
|
2912
|
|
|
2913 #define CONSIDER(BYTEPOS, CHARPOS) \
|
|
|
2914 do \
|
|
|
2915 { \
|
|
|
2916 Bytebpos this_bytepos = (BYTEPOS); \
|
|
|
2917 int changed = 0; \
|
|
|
2918 \
|
|
|
2919 if (this_bytepos == x) \
|
|
|
2920 { \
|
|
|
2921 retval = (CHARPOS); \
|
|
|
2922 goto done; \
|
|
|
2923 } \
|
|
|
2924 else if (this_bytepos > x) \
|
|
|
2925 { \
|
|
|
2926 if (this_bytepos < best_above_byte) \
|
|
|
2927 { \
|
|
|
2928 best_above = (CHARPOS); \
|
|
|
2929 best_above_byte = this_bytepos; \
|
|
|
2930 changed = 1; \
|
|
|
2931 } \
|
|
|
2932 } \
|
|
|
2933 else if (this_bytepos > best_below_byte) \
|
|
|
2934 { \
|
|
|
2935 best_below = (CHARPOS); \
|
|
|
2936 best_below_byte = this_bytepos; \
|
|
|
2937 changed = 1; \
|
|
|
2938 } \
|
|
|
2939 \
|
|
|
2940 if (changed) \
|
|
|
2941 { \
|
|
|
2942 if (best_above - best_below == best_above_byte - best_below_byte) \
|
|
|
2943 { \
|
|
|
2944 retval = best_below + (x - best_below_byte); \
|
|
|
2945 goto done; \
|
|
|
2946 } \
|
|
|
2947 } \
|
|
|
2948 } \
|
|
|
2949 while (0)
|
|
|
2950
|
|
771
|
2951 /* The logic in this function is almost identical to the logic in
|
|
|
2952 the previous function. */
|
|
|
2953
|
|
|
2954 Charbpos
|
|
|
2955 bytebpos_to_charbpos_func (struct buffer *buf, Bytebpos x)
|
|
|
2956 {
|
|
2367
|
2957 #ifdef OLD_BYTE_CHAR
|
|
771
|
2958 Charbpos bufmin;
|
|
|
2959 Charbpos bufmax;
|
|
|
2960 Bytebpos bytmin;
|
|
|
2961 Bytebpos bytmax;
|
|
|
2962 int size;
|
|
|
2963 int forward_p;
|
|
|
2964 int diff_so_far;
|
|
|
2965 int add_to_cache = 0;
|
|
2367
|
2966 #endif /* OLD_BYTE_CHAR */
|
|
|
2967
|
|
|
2968 Charbpos best_above, best_above_byte;
|
|
|
2969 Bytebpos best_below, best_below_byte;
|
|
|
2970 int i;
|
|
|
2971 struct buffer_text *t;
|
|
|
2972 Charbpos retval;
|
|
|
2973
|
|
1292
|
2974 PROFILE_DECLARE ();
|
|
771
|
2975
|
|
1292
|
2976 PROFILE_RECORD_ENTERING_SECTION (QSin_char_byte_conversion);
|
|
|
2977
|
|
2367
|
2978 best_above = BUF_Z (buf);
|
|
|
2979 best_above_byte = BYTE_BUF_Z (buf);
|
|
|
2980
|
|
|
2981 /* In this case, we simply have all one-byte characters. But this should
|
|
|
2982 have been intercepted before, in bytebpos_to_charbpos(). */
|
|
|
2983 text_checking_assert (best_above != best_above_byte);
|
|
|
2984
|
|
|
2985 best_below = BUF_BEG (buf);
|
|
|
2986 best_below_byte = BYTE_BUF_BEG (buf);
|
|
|
2987
|
|
|
2988 CONSIDER (BYTE_BUF_PT (buf), BUF_PT (buf));
|
|
|
2989 CONSIDER (BYTE_BUF_GPT (buf), BUF_GPT (buf));
|
|
|
2990 CONSIDER (BYTE_BUF_BEGV (buf), BUF_BEGV (buf));
|
|
|
2991 CONSIDER (BYTE_BUF_ZV (buf), BUF_ZV (buf));
|
|
|
2992
|
|
|
2993 t = buf->text;
|
|
|
2994 CONSIDER (t->cached_bytepos, t->cached_charpos);
|
|
|
2995
|
|
|
2996 /* Check the most recently entered positions first */
|
|
|
2997
|
|
|
2998 for (i = t->next_cache_pos - 1; i >= 0; i--)
|
|
|
2999 {
|
|
|
3000 CONSIDER (t->mule_bytebpos_cache[i], t->mule_charbpos_cache[i]);
|
|
|
3001
|
|
|
3002 /* If we are down to a range of 50 chars,
|
|
|
3003 don't bother checking any other markers;
|
|
|
3004 scan the intervening chars directly now. */
|
|
|
3005 if (best_above - best_below < 50)
|
|
|
3006 break;
|
|
|
3007 }
|
|
|
3008
|
|
|
3009 /* We get here if we did not exactly hit one of the known places.
|
|
|
3010 We have one known above and one known below.
|
|
|
3011 Scan, counting characters, from whichever one is closer. */
|
|
|
3012
|
|
|
3013 if (x - best_below_byte < best_above_byte - x)
|
|
|
3014 {
|
|
|
3015 int record = x - best_below_byte > 5000;
|
|
|
3016
|
|
|
3017 #ifdef OLD_LOOP /* old code */
|
|
|
3018 while (best_below_byte < x)
|
|
|
3019 {
|
|
|
3020 best_below++;
|
|
|
3021 INC_BYTEBPOS (buf, best_below_byte);
|
|
|
3022 }
|
|
|
3023 #else
|
|
|
3024 text_checking_assert (BUF_FORMAT (buf) == FORMAT_DEFAULT);
|
|
|
3025 /* The gap should not occur between best_below and x, or we will be
|
|
|
3026 screwed in using charcount_to_bytecount(). It should not be exactly
|
|
|
3027 at x either, because we already should have caught that. */
|
|
|
3028 text_checking_assert
|
|
|
3029 (BYTE_BUF_CEILING_OF_IGNORE_ACCESSIBLE (buf, best_below_byte) > x);
|
|
|
3030
|
|
|
3031 /* Using bytecount_to_charcount() is potentially a lot faster than
|
|
|
3032 a simple loop above using INC_BYTEBPOS(); see above.
|
|
|
3033 */
|
|
|
3034 best_below +=
|
|
|
3035 bytecount_to_charcount
|
|
|
3036 (BYTE_BUF_BYTE_ADDRESS (buf, best_below_byte), x - best_below_byte);
|
|
|
3037 best_below_byte = x;
|
|
|
3038 #endif
|
|
|
3039
|
|
|
3040 /* If this position is quite far from the nearest known position,
|
|
|
3041 cache the correspondence.
|
|
|
3042
|
|
|
3043 NB FSF does this: "... by creating a marker here.
|
|
|
3044 It will last until the next GC."
|
|
|
3045 */
|
|
|
3046
|
|
|
3047 if (record)
|
|
|
3048 {
|
|
|
3049 if (t->next_cache_pos == NUM_CACHED_POSITIONS)
|
|
|
3050 {
|
|
|
3051 memmove (t->mule_charbpos_cache,
|
|
|
3052 t->mule_charbpos_cache + NUM_MOVED_POSITIONS,
|
|
|
3053 sizeof (Charbpos) *
|
|
|
3054 (NUM_CACHED_POSITIONS - NUM_MOVED_POSITIONS));
|
|
|
3055 memmove (t->mule_bytebpos_cache,
|
|
|
3056 t->mule_bytebpos_cache + NUM_MOVED_POSITIONS,
|
|
|
3057 sizeof (Bytebpos) *
|
|
|
3058 (NUM_CACHED_POSITIONS - NUM_MOVED_POSITIONS));
|
|
|
3059 t->next_cache_pos -= NUM_MOVED_POSITIONS;
|
|
|
3060 }
|
|
|
3061 t->mule_charbpos_cache[t->next_cache_pos] = best_below;
|
|
|
3062 t->mule_bytebpos_cache[t->next_cache_pos] = best_below_byte;
|
|
|
3063 t->next_cache_pos++;
|
|
|
3064 }
|
|
|
3065
|
|
|
3066
|
|
|
3067 t->cached_charpos = best_below;
|
|
|
3068 t->cached_bytepos = best_below_byte;
|
|
|
3069
|
|
|
3070 retval = best_below;
|
|
|
3071 text_checking_assert (best_below_byte >= best_below);
|
|
|
3072 goto done;
|
|
|
3073 }
|
|
|
3074 else
|
|
|
3075 {
|
|
|
3076 int record = best_above_byte - x > 5000;
|
|
|
3077
|
|
|
3078 #ifdef OLD_LOOP /* old code */
|
|
|
3079 while (best_above_byte > x)
|
|
|
3080 {
|
|
|
3081 best_above--;
|
|
|
3082 DEC_BYTEBPOS (buf, best_above_byte);
|
|
|
3083 }
|
|
|
3084 #else
|
|
|
3085 text_checking_assert (BUF_FORMAT (buf) == FORMAT_DEFAULT);
|
|
|
3086 /* The gap should not occur between best_above and x, or we will be
|
|
|
3087 screwed in using bytecount_to_charcount_down(). It should not be
|
|
|
3088 exactly at x either, because we already should have caught
|
|
|
3089 that. */
|
|
|
3090 text_checking_assert
|
|
|
3091 (BYTE_BUF_FLOOR_OF_IGNORE_ACCESSIBLE (buf, best_above_byte) < x);
|
|
|
3092
|
|
|
3093 /* Using bytecount_to_charcount_down() is potentially a lot faster
|
|
|
3094 than a simple loop using INC_BYTEBPOS(); see above. */
|
|
|
3095 best_above -=
|
|
|
3096 bytecount_to_charcount_down
|
|
|
3097 /* BYTE_BUF_BYTE_ADDRESS will return a value on the high side of the
|
|
|
3098 gap if we are at the gap, which is the wrong side. So do the
|
|
|
3099 following trick instead. */
|
|
|
3100 (BYTE_BUF_BYTE_ADDRESS_BEFORE (buf, best_above_byte) + 1,
|
|
|
3101 best_above_byte - x);
|
|
|
3102 best_above_byte = x;
|
|
|
3103 #endif
|
|
|
3104
|
|
|
3105
|
|
|
3106 /* If this position is quite far from the nearest known position,
|
|
|
3107 cache the correspondence.
|
|
|
3108
|
|
|
3109 NB FSF does this: "... by creating a marker here.
|
|
|
3110 It will last until the next GC."
|
|
|
3111 */
|
|
|
3112 if (record)
|
|
|
3113 {
|
|
|
3114 if (t->next_cache_pos == NUM_CACHED_POSITIONS)
|
|
|
3115 {
|
|
|
3116 memmove (t->mule_charbpos_cache,
|
|
|
3117 t->mule_charbpos_cache + NUM_MOVED_POSITIONS,
|
|
|
3118 sizeof (Charbpos) *
|
|
|
3119 (NUM_CACHED_POSITIONS - NUM_MOVED_POSITIONS));
|
|
|
3120 memmove (t->mule_bytebpos_cache,
|
|
|
3121 t->mule_bytebpos_cache + NUM_MOVED_POSITIONS,
|
|
|
3122 sizeof (Bytebpos) *
|
|
|
3123 (NUM_CACHED_POSITIONS - NUM_MOVED_POSITIONS));
|
|
|
3124 t->next_cache_pos -= NUM_MOVED_POSITIONS;
|
|
|
3125 }
|
|
|
3126 t->mule_charbpos_cache[t->next_cache_pos] = best_above;
|
|
|
3127 t->mule_bytebpos_cache[t->next_cache_pos] = best_above_byte;
|
|
|
3128 t->next_cache_pos++;
|
|
|
3129 }
|
|
|
3130
|
|
|
3131 t->cached_charpos = best_above;
|
|
|
3132 t->cached_bytepos = best_above_byte;
|
|
|
3133
|
|
|
3134 retval = best_above;
|
|
|
3135 text_checking_assert (best_above_byte >= best_above);
|
|
|
3136 goto done;
|
|
|
3137 }
|
|
|
3138
|
|
|
3139 #ifdef OLD_BYTE_CHAR
|
|
|
3140
|
|
771
|
3141 bufmin = buf->text->mule_bufmin;
|
|
|
3142 bufmax = buf->text->mule_bufmax;
|
|
|
3143 bytmin = buf->text->mule_bytmin;
|
|
|
3144 bytmax = buf->text->mule_bytmax;
|
|
|
3145 size = (1 << buf->text->mule_shifter) + !!buf->text->mule_three_p;
|
|
|
3146
|
|
|
3147 /* The basic idea here is that we shift the "known region" up or down
|
|
|
3148 until it overlaps the specified position. We do this by moving
|
|
|
3149 the upper bound of the known region up one character at a time,
|
|
|
3150 and moving the lower bound of the known region up as necessary
|
|
|
3151 when the size of the character just seen changes.
|
|
|
3152
|
|
|
3153 We optimize this, however, by first shifting the known region to
|
|
826
|
3154 one of the cached points if it's close by. (We don't check BYTE_BEG or
|
|
|
3155 BYTE_Z, even though they're cached; most of the time these will be the
|
|
|
3156 same as BYTE_BEGV and BYTE_ZV, and when they're not, they're not likely
|
|
771
|
3157 to be used.) */
|
|
|
3158
|
|
|
3159 if (x > bytmax)
|
|
|
3160 {
|
|
|
3161 Bytebpos diffmax = x - bytmax;
|
|
826
|
3162 Bytebpos diffpt = x - BYTE_BUF_PT (buf);
|
|
|
3163 Bytebpos diffzv = BYTE_BUF_ZV (buf) - x;
|
|
771
|
3164 /* #### This value could stand some more exploration. */
|
|
|
3165 Bytecount heuristic_hack = (bytmax - bytmin) >> 2;
|
|
|
3166
|
|
|
3167 /* Check if the position is closer to PT or ZV than to the
|
|
|
3168 end of the known region. */
|
|
|
3169
|
|
|
3170 if (diffpt < 0)
|
|
|
3171 diffpt = -diffpt;
|
|
|
3172 if (diffzv < 0)
|
|
|
3173 diffzv = -diffzv;
|
|
|
3174
|
|
|
3175 /* But also implement a heuristic that favors the known region
|
|
826
|
3176 over BYTE_PT or BYTE_ZV. The reason for this is that switching to
|
|
|
3177 BYTE_PT or BYTE_ZV will wipe out the knowledge in the known region,
|
|
771
|
3178 which might be annoying if the known region is large and
|
|
826
|
3179 BYTE_PT or BYTE_ZV is not that much closer than the end of the known
|
|
771
|
3180 region. */
|
|
|
3181
|
|
|
3182 diffzv += heuristic_hack;
|
|
|
3183 diffpt += heuristic_hack;
|
|
|
3184 if (diffpt < diffmax && diffpt <= diffzv)
|
|
|
3185 {
|
|
|
3186 bufmax = bufmin = BUF_PT (buf);
|
|
826
|
3187 bytmax = bytmin = BYTE_BUF_PT (buf);
|
|
771
|
3188 /* We set the size to 1 even though it doesn't really
|
|
|
3189 matter because the new known region contains no
|
|
|
3190 characters. We do this because this is the most
|
|
|
3191 likely size of the characters around the new known
|
|
|
3192 region, and we avoid potential yuckiness that is
|
|
|
3193 done when size == 3. */
|
|
|
3194 size = 1;
|
|
|
3195 }
|
|
|
3196 if (diffzv < diffmax)
|
|
|
3197 {
|
|
|
3198 bufmax = bufmin = BUF_ZV (buf);
|
|
826
|
3199 bytmax = bytmin = BYTE_BUF_ZV (buf);
|
|
771
|
3200 size = 1;
|
|
|
3201 }
|
|
|
3202 }
|
|
800
|
3203 #ifdef ERROR_CHECK_TEXT
|
|
771
|
3204 else if (x >= bytmin)
|
|
2500
|
3205 ABORT ();
|
|
771
|
3206 #endif
|
|
|
3207 else
|
|
|
3208 {
|
|
|
3209 Bytebpos diffmin = bytmin - x;
|
|
826
|
3210 Bytebpos diffpt = BYTE_BUF_PT (buf) - x;
|
|
|
3211 Bytebpos diffbegv = x - BYTE_BUF_BEGV (buf);
|
|
771
|
3212 /* #### This value could stand some more exploration. */
|
|
|
3213 Bytecount heuristic_hack = (bytmax - bytmin) >> 2;
|
|
|
3214
|
|
|
3215 if (diffpt < 0)
|
|
|
3216 diffpt = -diffpt;
|
|
|
3217 if (diffbegv < 0)
|
|
|
3218 diffbegv = -diffbegv;
|
|
|
3219
|
|
|
3220 /* But also implement a heuristic that favors the known region --
|
|
|
3221 see above. */
|
|
|
3222
|
|
|
3223 diffbegv += heuristic_hack;
|
|
|
3224 diffpt += heuristic_hack;
|
|
|
3225
|
|
|
3226 if (diffpt < diffmin && diffpt <= diffbegv)
|
|
|
3227 {
|
|
|
3228 bufmax = bufmin = BUF_PT (buf);
|
|
826
|
3229 bytmax = bytmin = BYTE_BUF_PT (buf);
|
|
771
|
3230 /* We set the size to 1 even though it doesn't really
|
|
|
3231 matter because the new known region contains no
|
|
|
3232 characters. We do this because this is the most
|
|
|
3233 likely size of the characters around the new known
|
|
|
3234 region, and we avoid potential yuckiness that is
|
|
|
3235 done when size == 3. */
|
|
|
3236 size = 1;
|
|
|
3237 }
|
|
|
3238 if (diffbegv < diffmin)
|
|
|
3239 {
|
|
|
3240 bufmax = bufmin = BUF_BEGV (buf);
|
|
826
|
3241 bytmax = bytmin = BYTE_BUF_BEGV (buf);
|
|
771
|
3242 size = 1;
|
|
|
3243 }
|
|
|
3244 }
|
|
|
3245
|
|
|
3246 diff_so_far = x > bytmax ? x - bytmax : bytmin - x;
|
|
|
3247 if (diff_so_far > 50)
|
|
|
3248 {
|
|
|
3249 /* If we have to move more than a certain amount, then look
|
|
|
3250 into our cache. */
|
|
|
3251 int minval = INT_MAX;
|
|
|
3252 int found = 0;
|
|
|
3253 int i;
|
|
|
3254
|
|
|
3255 add_to_cache = 1;
|
|
|
3256 /* I considered keeping the positions ordered. This would speed
|
|
|
3257 up this loop, but updating the cache would take longer, so
|
|
|
3258 it doesn't seem like it would really matter. */
|
|
2367
|
3259 for (i = 0; i < NUM_CACHED_POSITIONS; i++)
|
|
771
|
3260 {
|
|
|
3261 int diff = buf->text->mule_bytebpos_cache[i] - x;
|
|
|
3262
|
|
|
3263 if (diff < 0)
|
|
|
3264 diff = -diff;
|
|
|
3265 if (diff < minval)
|
|
|
3266 {
|
|
|
3267 minval = diff;
|
|
|
3268 found = i;
|
|
|
3269 }
|
|
|
3270 }
|
|
|
3271
|
|
|
3272 if (minval < diff_so_far)
|
|
|
3273 {
|
|
|
3274 bufmax = bufmin = buf->text->mule_charbpos_cache[found];
|
|
|
3275 bytmax = bytmin = buf->text->mule_bytebpos_cache[found];
|
|
|
3276 size = 1;
|
|
|
3277 }
|
|
|
3278 }
|
|
|
3279
|
|
|
3280 /* It's conceivable that the caching above could lead to X being
|
|
|
3281 the same as one of the range edges. */
|
|
|
3282 if (x >= bytmax)
|
|
|
3283 {
|
|
|
3284 Bytebpos newmax;
|
|
|
3285 Bytecount newsize;
|
|
|
3286
|
|
|
3287 forward_p = 1;
|
|
|
3288 while (x > bytmax)
|
|
|
3289 {
|
|
|
3290 newmax = bytmax;
|
|
|
3291
|
|
|
3292 INC_BYTEBPOS (buf, newmax);
|
|
|
3293 newsize = newmax - bytmax;
|
|
|
3294 if (newsize != size)
|
|
|
3295 {
|
|
|
3296 bufmin = bufmax;
|
|
|
3297 bytmin = bytmax;
|
|
|
3298 size = newsize;
|
|
|
3299 }
|
|
|
3300 bytmax = newmax;
|
|
|
3301 bufmax++;
|
|
|
3302 }
|
|
|
3303 retval = bufmax;
|
|
|
3304
|
|
|
3305 /* #### Should go past the found location to reduce the number
|
|
|
3306 of times that this function is called */
|
|
|
3307 }
|
|
|
3308 else /* x <= bytmin */
|
|
|
3309 {
|
|
|
3310 Bytebpos newmin;
|
|
|
3311 Bytecount newsize;
|
|
|
3312
|
|
|
3313 forward_p = 0;
|
|
|
3314 while (x < bytmin)
|
|
|
3315 {
|
|
|
3316 newmin = bytmin;
|
|
|
3317
|
|
|
3318 DEC_BYTEBPOS (buf, newmin);
|
|
|
3319 newsize = bytmin - newmin;
|
|
|
3320 if (newsize != size)
|
|
|
3321 {
|
|
|
3322 bufmax = bufmin;
|
|
|
3323 bytmax = bytmin;
|
|
|
3324 size = newsize;
|
|
|
3325 }
|
|
|
3326 bytmin = newmin;
|
|
|
3327 bufmin--;
|
|
|
3328 }
|
|
|
3329 retval = bufmin;
|
|
|
3330
|
|
|
3331 /* #### Should go past the found location to reduce the number
|
|
|
3332 of times that this function is called
|
|
|
3333 */
|
|
|
3334 }
|
|
|
3335
|
|
|
3336 /* If size is three, than we have to max sure that the range we
|
|
|
3337 discovered isn't too large, because we use a fixed-length
|
|
|
3338 table to divide by 3. */
|
|
|
3339
|
|
|
3340 if (size == 3)
|
|
|
3341 {
|
|
|
3342 int gap = bytmax - bytmin;
|
|
|
3343 buf->text->mule_three_p = 1;
|
|
|
3344 buf->text->mule_shifter = 1;
|
|
|
3345
|
|
|
3346 if (gap > MAX_BYTEBPOS_GAP_SIZE_3)
|
|
|
3347 {
|
|
|
3348 if (forward_p)
|
|
|
3349 {
|
|
|
3350 bytmin = bytmax - MAX_BYTEBPOS_GAP_SIZE_3;
|
|
|
3351 bufmin = bufmax - MAX_CHARBPOS_GAP_SIZE_3;
|
|
|
3352 }
|
|
|
3353 else
|
|
|
3354 {
|
|
|
3355 bytmax = bytmin + MAX_BYTEBPOS_GAP_SIZE_3;
|
|
|
3356 bufmax = bufmin + MAX_CHARBPOS_GAP_SIZE_3;
|
|
|
3357 }
|
|
|
3358 }
|
|
|
3359 }
|
|
|
3360 else
|
|
|
3361 {
|
|
|
3362 buf->text->mule_three_p = 0;
|
|
|
3363 if (size == 4)
|
|
|
3364 buf->text->mule_shifter = 2;
|
|
|
3365 else
|
|
|
3366 buf->text->mule_shifter = size - 1;
|
|
|
3367 }
|
|
|
3368
|
|
|
3369 buf->text->mule_bufmin = bufmin;
|
|
|
3370 buf->text->mule_bufmax = bufmax;
|
|
|
3371 buf->text->mule_bytmin = bytmin;
|
|
|
3372 buf->text->mule_bytmax = bytmax;
|
|
|
3373
|
|
|
3374 if (add_to_cache)
|
|
|
3375 {
|
|
|
3376 int replace_loc;
|
|
|
3377
|
|
|
3378 /* We throw away a "random" cached value and replace it with
|
|
|
3379 the new value. It doesn't actually have to be very random
|
|
|
3380 at all, just evenly distributed.
|
|
|
3381
|
|
|
3382 #### It would be better to use a least-recently-used algorithm
|
|
|
3383 or something that tries to space things out, but I'm not sure
|
|
|
3384 it's worth it to go to the trouble of maintaining that. */
|
|
|
3385 not_very_random_number += 621;
|
|
|
3386 replace_loc = not_very_random_number & 15;
|
|
|
3387 buf->text->mule_charbpos_cache[replace_loc] = retval;
|
|
|
3388 buf->text->mule_bytebpos_cache[replace_loc] = x;
|
|
|
3389 }
|
|
2367
|
3390 #endif /* OLD_BYTE_CHAR */
|
|
|
3391
|
|
|
3392 done:
|
|
1292
|
3393 PROFILE_RECORD_EXITING_SECTION (QSin_char_byte_conversion);
|
|
|
3394
|
|
771
|
3395 return retval;
|
|
|
3396 }
|
|
|
3397
|
|
|
3398 /* Text of length BYTELENGTH and CHARLENGTH (in different units)
|
|
|
3399 was inserted at charbpos START. */
|
|
|
3400
|
|
|
3401 void
|
|
|
3402 buffer_mule_signal_inserted_region (struct buffer *buf, Charbpos start,
|
|
|
3403 Bytecount bytelength,
|
|
|
3404 Charcount charlength)
|
|
|
3405 {
|
|
2367
|
3406 #ifdef OLD_BYTE_CHAR
|
|
771
|
3407 int size = (1 << buf->text->mule_shifter) + !!buf->text->mule_three_p;
|
|
2367
|
3408 #endif /* OLD_BYTE_CHAR */
|
|
771
|
3409 int i;
|
|
|
3410
|
|
|
3411 /* Adjust the cache of known positions. */
|
|
2367
|
3412 for (i = 0; i < buf->text->next_cache_pos; i++)
|
|
771
|
3413 {
|
|
|
3414
|
|
|
3415 if (buf->text->mule_charbpos_cache[i] > start)
|
|
|
3416 {
|
|
|
3417 buf->text->mule_charbpos_cache[i] += charlength;
|
|
|
3418 buf->text->mule_bytebpos_cache[i] += bytelength;
|
|
|
3419 }
|
|
|
3420 }
|
|
|
3421
|
|
2367
|
3422 /* Adjust the special cached position. */
|
|
|
3423
|
|
|
3424 if (buf->text->cached_charpos > start)
|
|
|
3425 {
|
|
|
3426 buf->text->cached_charpos += charlength;
|
|
|
3427 buf->text->cached_bytepos += bytelength;
|
|
|
3428 }
|
|
|
3429
|
|
|
3430 #ifdef OLD_BYTE_CHAR
|
|
771
|
3431 if (start >= buf->text->mule_bufmax)
|
|
826
|
3432 return;
|
|
771
|
3433
|
|
|
3434 /* The insertion is either before the known region, in which case
|
|
|
3435 it shoves it forward; or within the known region, in which case
|
|
|
3436 it shoves the end forward. (But it may make the known region
|
|
|
3437 inconsistent, so we may have to shorten it.) */
|
|
|
3438
|
|
|
3439 if (start <= buf->text->mule_bufmin)
|
|
|
3440 {
|
|
|
3441 buf->text->mule_bufmin += charlength;
|
|
|
3442 buf->text->mule_bufmax += charlength;
|
|
|
3443 buf->text->mule_bytmin += bytelength;
|
|
|
3444 buf->text->mule_bytmax += bytelength;
|
|
|
3445 }
|
|
|
3446 else
|
|
|
3447 {
|
|
|
3448 Charbpos end = start + charlength;
|
|
|
3449 /* the insertion point divides the known region in two.
|
|
|
3450 Keep the longer half, at least, and expand into the
|
|
|
3451 inserted chunk as much as possible. */
|
|
|
3452
|
|
|
3453 if (start - buf->text->mule_bufmin > buf->text->mule_bufmax - start)
|
|
|
3454 {
|
|
|
3455 Bytebpos bytestart = (buf->text->mule_bytmin
|
|
|
3456 + size * (start - buf->text->mule_bufmin));
|
|
|
3457 Bytebpos bytenew;
|
|
|
3458
|
|
|
3459 while (start < end)
|
|
|
3460 {
|
|
|
3461 bytenew = bytestart;
|
|
|
3462 INC_BYTEBPOS (buf, bytenew);
|
|
|
3463 if (bytenew - bytestart != size)
|
|
|
3464 break;
|
|
|
3465 start++;
|
|
|
3466 bytestart = bytenew;
|
|
|
3467 }
|
|
|
3468 if (start != end)
|
|
|
3469 {
|
|
|
3470 buf->text->mule_bufmax = start;
|
|
|
3471 buf->text->mule_bytmax = bytestart;
|
|
|
3472 }
|
|
|
3473 else
|
|
|
3474 {
|
|
|
3475 buf->text->mule_bufmax += charlength;
|
|
|
3476 buf->text->mule_bytmax += bytelength;
|
|
|
3477 }
|
|
|
3478 }
|
|
|
3479 else
|
|
|
3480 {
|
|
|
3481 Bytebpos byteend = (buf->text->mule_bytmin
|
|
|
3482 + size * (start - buf->text->mule_bufmin)
|
|
|
3483 + bytelength);
|
|
|
3484 Bytebpos bytenew;
|
|
|
3485
|
|
|
3486 buf->text->mule_bufmax += charlength;
|
|
|
3487 buf->text->mule_bytmax += bytelength;
|
|
|
3488
|
|
|
3489 while (end > start)
|
|
|
3490 {
|
|
|
3491 bytenew = byteend;
|
|
|
3492 DEC_BYTEBPOS (buf, bytenew);
|
|
|
3493 if (byteend - bytenew != size)
|
|
|
3494 break;
|
|
|
3495 end--;
|
|
|
3496 byteend = bytenew;
|
|
|
3497 }
|
|
|
3498 if (start != end)
|
|
|
3499 {
|
|
|
3500 buf->text->mule_bufmin = end;
|
|
|
3501 buf->text->mule_bytmin = byteend;
|
|
|
3502 }
|
|
|
3503 }
|
|
|
3504 }
|
|
2367
|
3505 #endif /* OLD_BYTE_CHAR */
|
|
771
|
3506 }
|
|
|
3507
|
|
826
|
3508 /* Text from START to END (equivalent in Bytebpos's: from BYTE_START to
|
|
|
3509 BYTE_END) was deleted. */
|
|
771
|
3510
|
|
|
3511 void
|
|
|
3512 buffer_mule_signal_deleted_region (struct buffer *buf, Charbpos start,
|
|
826
|
3513 Charbpos end, Bytebpos byte_start,
|
|
|
3514 Bytebpos byte_end)
|
|
771
|
3515 {
|
|
|
3516 int i;
|
|
|
3517
|
|
|
3518 /* Adjust the cache of known positions. */
|
|
2367
|
3519 for (i = 0; i < buf->text->next_cache_pos; i++)
|
|
771
|
3520 {
|
|
|
3521 /* After the end; gets shoved backward */
|
|
|
3522 if (buf->text->mule_charbpos_cache[i] > end)
|
|
|
3523 {
|
|
|
3524 buf->text->mule_charbpos_cache[i] -= end - start;
|
|
826
|
3525 buf->text->mule_bytebpos_cache[i] -= byte_end - byte_start;
|
|
771
|
3526 }
|
|
|
3527 /* In the range; moves to start of range */
|
|
|
3528 else if (buf->text->mule_charbpos_cache[i] > start)
|
|
|
3529 {
|
|
|
3530 buf->text->mule_charbpos_cache[i] = start;
|
|
826
|
3531 buf->text->mule_bytebpos_cache[i] = byte_start;
|
|
771
|
3532 }
|
|
|
3533 }
|
|
|
3534
|
|
2367
|
3535 /* Adjust the special cached position. */
|
|
|
3536
|
|
|
3537 /* After the end; gets shoved backward */
|
|
|
3538 if (buf->text->cached_charpos > end)
|
|
|
3539 {
|
|
|
3540 buf->text->cached_charpos -= end - start;
|
|
|
3541 buf->text->cached_bytepos -= byte_end - byte_start;
|
|
|
3542 }
|
|
|
3543 /* In the range; moves to start of range */
|
|
|
3544 else if (buf->text->cached_charpos > start)
|
|
|
3545 {
|
|
|
3546 buf->text->cached_charpos = start;
|
|
|
3547 buf->text->cached_bytepos = byte_start;
|
|
|
3548 }
|
|
|
3549
|
|
|
3550 #ifdef OLD_BYTE_CHAR
|
|
771
|
3551 /* We don't care about any text after the end of the known region. */
|
|
|
3552
|
|
|
3553 end = min (end, buf->text->mule_bufmax);
|
|
826
|
3554 byte_end = min (byte_end, buf->text->mule_bytmax);
|
|
771
|
3555 if (start >= end)
|
|
826
|
3556 return;
|
|
771
|
3557
|
|
|
3558 /* The end of the known region offsets by the total amount of deletion,
|
|
|
3559 since it's all before it. */
|
|
|
3560
|
|
|
3561 buf->text->mule_bufmax -= end - start;
|
|
826
|
3562 buf->text->mule_bytmax -= byte_end - byte_start;
|
|
771
|
3563
|
|
|
3564 /* Now we don't care about any text after the start of the known region. */
|
|
|
3565
|
|
|
3566 end = min (end, buf->text->mule_bufmin);
|
|
826
|
3567 byte_end = min (byte_end, buf->text->mule_bytmin);
|
|
771
|
3568 if (start < end)
|
|
|
3569 {
|
|
|
3570 buf->text->mule_bufmin -= end - start;
|
|
826
|
3571 buf->text->mule_bytmin -= byte_end - byte_start;
|
|
771
|
3572 }
|
|
2367
|
3573 #endif /* OLD_BYTE_CHAR */
|
|
771
|
3574 }
|
|
|
3575
|
|
|
3576 #endif /* MULE */
|
|
|
3577
|
|
|
3578
|
|
|
3579 /************************************************************************/
|
|
|
3580 /* verifying buffer and string positions */
|
|
|
3581 /************************************************************************/
|
|
|
3582
|
|
|
3583 /* Functions below are tagged with either _byte or _char indicating
|
|
|
3584 whether they return byte or character positions. For a buffer,
|
|
|
3585 a character position is a "Charbpos" and a byte position is a "Bytebpos".
|
|
|
3586 For strings, these are sometimes typed using "Charcount" and
|
|
|
3587 "Bytecount". */
|
|
|
3588
|
|
|
3589 /* Flags for the functions below are:
|
|
|
3590
|
|
|
3591 GB_ALLOW_PAST_ACCESSIBLE
|
|
|
3592
|
|
|
3593 Allow positions to range over the entire buffer (BUF_BEG to BUF_Z),
|
|
|
3594 rather than just the accessible portion (BUF_BEGV to BUF_ZV).
|
|
|
3595 For strings, this flag has no effect.
|
|
|
3596
|
|
|
3597 GB_COERCE_RANGE
|
|
|
3598
|
|
|
3599 If the position is outside the allowable range, return the lower
|
|
|
3600 or upper bound of the range, whichever is closer to the specified
|
|
|
3601 position.
|
|
|
3602
|
|
|
3603 GB_NO_ERROR_IF_BAD
|
|
|
3604
|
|
|
3605 If the position is outside the allowable range, return -1.
|
|
|
3606
|
|
|
3607 GB_NEGATIVE_FROM_END
|
|
|
3608
|
|
|
3609 If a value is negative, treat it as an offset from the end.
|
|
|
3610 Only applies to strings.
|
|
|
3611
|
|
|
3612 The following additional flags apply only to the functions
|
|
|
3613 that return ranges:
|
|
|
3614
|
|
|
3615 GB_ALLOW_NIL
|
|
|
3616
|
|
|
3617 Either or both positions can be nil. If FROM is nil,
|
|
|
3618 FROM_OUT will contain the lower bound of the allowed range.
|
|
|
3619 If TO is nil, TO_OUT will contain the upper bound of the
|
|
|
3620 allowed range.
|
|
|
3621
|
|
|
3622 GB_CHECK_ORDER
|
|
|
3623
|
|
|
3624 FROM must contain the lower bound and TO the upper bound
|
|
|
3625 of the range. If the positions are reversed, an error is
|
|
|
3626 signalled.
|
|
|
3627
|
|
|
3628 The following is a combination flag:
|
|
|
3629
|
|
|
3630 GB_HISTORICAL_STRING_BEHAVIOR
|
|
|
3631
|
|
|
3632 Equivalent to (GB_NEGATIVE_FROM_END | GB_ALLOW_NIL).
|
|
|
3633 */
|
|
|
3634
|
|
|
3635 /* Return a buffer position stored in a Lisp_Object. Full
|
|
|
3636 error-checking is done on the position. Flags can be specified to
|
|
|
3637 control the behavior of out-of-range values. The default behavior
|
|
|
3638 is to require that the position is within the accessible part of
|
|
|
3639 the buffer (BEGV and ZV), and to signal an error if the position is
|
|
|
3640 out of range.
|
|
|
3641
|
|
|
3642 */
|
|
|
3643
|
|
|
3644 Charbpos
|
|
|
3645 get_buffer_pos_char (struct buffer *b, Lisp_Object pos, unsigned int flags)
|
|
|
3646 {
|
|
|
3647 /* Does not GC */
|
|
|
3648 Charbpos ind;
|
|
|
3649 Charbpos min_allowed, max_allowed;
|
|
|
3650
|
|
|
3651 CHECK_INT_COERCE_MARKER (pos);
|
|
|
3652 ind = XINT (pos);
|
|
|
3653 min_allowed = flags & GB_ALLOW_PAST_ACCESSIBLE ? BUF_BEG (b) : BUF_BEGV (b);
|
|
|
3654 max_allowed = flags & GB_ALLOW_PAST_ACCESSIBLE ? BUF_Z (b) : BUF_ZV (b);
|
|
|
3655
|
|
|
3656 if (ind < min_allowed || ind > max_allowed)
|
|
|
3657 {
|
|
|
3658 if (flags & GB_COERCE_RANGE)
|
|
|
3659 ind = ind < min_allowed ? min_allowed : max_allowed;
|
|
|
3660 else if (flags & GB_NO_ERROR_IF_BAD)
|
|
|
3661 ind = -1;
|
|
|
3662 else
|
|
|
3663 {
|
|
793
|
3664 Lisp_Object buffer = wrap_buffer (b);
|
|
|
3665
|
|
771
|
3666 args_out_of_range (buffer, pos);
|
|
|
3667 }
|
|
|
3668 }
|
|
|
3669
|
|
|
3670 return ind;
|
|
|
3671 }
|
|
|
3672
|
|
|
3673 Bytebpos
|
|
|
3674 get_buffer_pos_byte (struct buffer *b, Lisp_Object pos, unsigned int flags)
|
|
|
3675 {
|
|
|
3676 Charbpos bpos = get_buffer_pos_char (b, pos, flags);
|
|
|
3677 if (bpos < 0) /* could happen with GB_NO_ERROR_IF_BAD */
|
|
|
3678 return -1;
|
|
|
3679 return charbpos_to_bytebpos (b, bpos);
|
|
|
3680 }
|
|
|
3681
|
|
|
3682 /* Return a pair of buffer positions representing a range of text,
|
|
|
3683 taken from a pair of Lisp_Objects. Full error-checking is
|
|
|
3684 done on the positions. Flags can be specified to control the
|
|
|
3685 behavior of out-of-range values. The default behavior is to
|
|
|
3686 allow the range bounds to be specified in either order
|
|
|
3687 (however, FROM_OUT will always be the lower bound of the range
|
|
|
3688 and TO_OUT the upper bound),to require that the positions
|
|
|
3689 are within the accessible part of the buffer (BEGV and ZV),
|
|
|
3690 and to signal an error if the positions are out of range.
|
|
|
3691 */
|
|
|
3692
|
|
|
3693 void
|
|
|
3694 get_buffer_range_char (struct buffer *b, Lisp_Object from, Lisp_Object to,
|
|
826
|
3695 Charbpos *from_out, Charbpos *to_out,
|
|
|
3696 unsigned int flags)
|
|
771
|
3697 {
|
|
|
3698 /* Does not GC */
|
|
|
3699 Charbpos min_allowed, max_allowed;
|
|
|
3700
|
|
|
3701 min_allowed = (flags & GB_ALLOW_PAST_ACCESSIBLE) ?
|
|
|
3702 BUF_BEG (b) : BUF_BEGV (b);
|
|
|
3703 max_allowed = (flags & GB_ALLOW_PAST_ACCESSIBLE) ?
|
|
|
3704 BUF_Z (b) : BUF_ZV (b);
|
|
|
3705
|
|
|
3706 if (NILP (from) && (flags & GB_ALLOW_NIL))
|
|
|
3707 *from_out = min_allowed;
|
|
|
3708 else
|
|
|
3709 *from_out = get_buffer_pos_char (b, from, flags | GB_NO_ERROR_IF_BAD);
|
|
|
3710
|
|
|
3711 if (NILP (to) && (flags & GB_ALLOW_NIL))
|
|
|
3712 *to_out = max_allowed;
|
|
|
3713 else
|
|
|
3714 *to_out = get_buffer_pos_char (b, to, flags | GB_NO_ERROR_IF_BAD);
|
|
|
3715
|
|
|
3716 if ((*from_out < 0 || *to_out < 0) && !(flags & GB_NO_ERROR_IF_BAD))
|
|
|
3717 {
|
|
793
|
3718 Lisp_Object buffer = wrap_buffer (b);
|
|
|
3719
|
|
771
|
3720 args_out_of_range_3 (buffer, from, to);
|
|
|
3721 }
|
|
|
3722
|
|
|
3723 if (*from_out >= 0 && *to_out >= 0 && *from_out > *to_out)
|
|
|
3724 {
|
|
|
3725 if (flags & GB_CHECK_ORDER)
|
|
|
3726 invalid_argument_2 ("start greater than end", from, to);
|
|
|
3727 else
|
|
|
3728 {
|
|
|
3729 Charbpos temp = *from_out;
|
|
|
3730 *from_out = *to_out;
|
|
|
3731 *to_out = temp;
|
|
|
3732 }
|
|
|
3733 }
|
|
|
3734 }
|
|
|
3735
|
|
|
3736 void
|
|
|
3737 get_buffer_range_byte (struct buffer *b, Lisp_Object from, Lisp_Object to,
|
|
826
|
3738 Bytebpos *from_out, Bytebpos *to_out,
|
|
|
3739 unsigned int flags)
|
|
771
|
3740 {
|
|
|
3741 Charbpos s, e;
|
|
|
3742
|
|
|
3743 get_buffer_range_char (b, from, to, &s, &e, flags);
|
|
|
3744 if (s >= 0)
|
|
|
3745 *from_out = charbpos_to_bytebpos (b, s);
|
|
|
3746 else /* could happen with GB_NO_ERROR_IF_BAD */
|
|
|
3747 *from_out = -1;
|
|
|
3748 if (e >= 0)
|
|
|
3749 *to_out = charbpos_to_bytebpos (b, e);
|
|
|
3750 else
|
|
|
3751 *to_out = -1;
|
|
|
3752 }
|
|
|
3753
|
|
|
3754 static Charcount
|
|
|
3755 get_string_pos_char_1 (Lisp_Object string, Lisp_Object pos, unsigned int flags,
|
|
|
3756 Charcount known_length)
|
|
|
3757 {
|
|
|
3758 Charcount ccpos;
|
|
|
3759 Charcount min_allowed = 0;
|
|
|
3760 Charcount max_allowed = known_length;
|
|
|
3761
|
|
|
3762 /* Computation of KNOWN_LENGTH is potentially expensive so we pass
|
|
|
3763 it in. */
|
|
|
3764 CHECK_INT (pos);
|
|
|
3765 ccpos = XINT (pos);
|
|
|
3766 if (ccpos < 0 && flags & GB_NEGATIVE_FROM_END)
|
|
|
3767 ccpos += max_allowed;
|
|
|
3768
|
|
|
3769 if (ccpos < min_allowed || ccpos > max_allowed)
|
|
|
3770 {
|
|
|
3771 if (flags & GB_COERCE_RANGE)
|
|
|
3772 ccpos = ccpos < min_allowed ? min_allowed : max_allowed;
|
|
|
3773 else if (flags & GB_NO_ERROR_IF_BAD)
|
|
|
3774 ccpos = -1;
|
|
|
3775 else
|
|
|
3776 args_out_of_range (string, pos);
|
|
|
3777 }
|
|
|
3778
|
|
|
3779 return ccpos;
|
|
|
3780 }
|
|
|
3781
|
|
|
3782 Charcount
|
|
|
3783 get_string_pos_char (Lisp_Object string, Lisp_Object pos, unsigned int flags)
|
|
|
3784 {
|
|
|
3785 return get_string_pos_char_1 (string, pos, flags,
|
|
826
|
3786 string_char_length (string));
|
|
771
|
3787 }
|
|
|
3788
|
|
|
3789 Bytecount
|
|
|
3790 get_string_pos_byte (Lisp_Object string, Lisp_Object pos, unsigned int flags)
|
|
|
3791 {
|
|
|
3792 Charcount ccpos = get_string_pos_char (string, pos, flags);
|
|
|
3793 if (ccpos < 0) /* could happen with GB_NO_ERROR_IF_BAD */
|
|
|
3794 return -1;
|
|
793
|
3795 return string_index_char_to_byte (string, ccpos);
|
|
771
|
3796 }
|
|
|
3797
|
|
|
3798 void
|
|
|
3799 get_string_range_char (Lisp_Object string, Lisp_Object from, Lisp_Object to,
|
|
|
3800 Charcount *from_out, Charcount *to_out,
|
|
|
3801 unsigned int flags)
|
|
|
3802 {
|
|
|
3803 Charcount min_allowed = 0;
|
|
826
|
3804 Charcount max_allowed = string_char_length (string);
|
|
771
|
3805
|
|
|
3806 if (NILP (from) && (flags & GB_ALLOW_NIL))
|
|
|
3807 *from_out = min_allowed;
|
|
|
3808 else
|
|
|
3809 *from_out = get_string_pos_char_1 (string, from,
|
|
|
3810 flags | GB_NO_ERROR_IF_BAD,
|
|
|
3811 max_allowed);
|
|
|
3812
|
|
|
3813 if (NILP (to) && (flags & GB_ALLOW_NIL))
|
|
|
3814 *to_out = max_allowed;
|
|
|
3815 else
|
|
|
3816 *to_out = get_string_pos_char_1 (string, to,
|
|
|
3817 flags | GB_NO_ERROR_IF_BAD,
|
|
|
3818 max_allowed);
|
|
|
3819
|
|
|
3820 if ((*from_out < 0 || *to_out < 0) && !(flags & GB_NO_ERROR_IF_BAD))
|
|
|
3821 args_out_of_range_3 (string, from, to);
|
|
|
3822
|
|
|
3823 if (*from_out >= 0 && *to_out >= 0 && *from_out > *to_out)
|
|
|
3824 {
|
|
|
3825 if (flags & GB_CHECK_ORDER)
|
|
|
3826 invalid_argument_2 ("start greater than end", from, to);
|
|
|
3827 else
|
|
|
3828 {
|
|
|
3829 Charbpos temp = *from_out;
|
|
|
3830 *from_out = *to_out;
|
|
|
3831 *to_out = temp;
|
|
|
3832 }
|
|
|
3833 }
|
|
|
3834 }
|
|
|
3835
|
|
|
3836 void
|
|
|
3837 get_string_range_byte (Lisp_Object string, Lisp_Object from, Lisp_Object to,
|
|
|
3838 Bytecount *from_out, Bytecount *to_out,
|
|
|
3839 unsigned int flags)
|
|
|
3840 {
|
|
|
3841 Charcount s, e;
|
|
|
3842
|
|
|
3843 get_string_range_char (string, from, to, &s, &e, flags);
|
|
|
3844 if (s >= 0)
|
|
793
|
3845 *from_out = string_index_char_to_byte (string, s);
|
|
771
|
3846 else /* could happen with GB_NO_ERROR_IF_BAD */
|
|
|
3847 *from_out = -1;
|
|
|
3848 if (e >= 0)
|
|
793
|
3849 *to_out = string_index_char_to_byte (string, e);
|
|
771
|
3850 else
|
|
|
3851 *to_out = -1;
|
|
|
3852
|
|
|
3853 }
|
|
|
3854
|
|
826
|
3855 Charxpos
|
|
771
|
3856 get_buffer_or_string_pos_char (Lisp_Object object, Lisp_Object pos,
|
|
|
3857 unsigned int flags)
|
|
|
3858 {
|
|
|
3859 return STRINGP (object) ?
|
|
|
3860 get_string_pos_char (object, pos, flags) :
|
|
|
3861 get_buffer_pos_char (XBUFFER (object), pos, flags);
|
|
|
3862 }
|
|
|
3863
|
|
826
|
3864 Bytexpos
|
|
771
|
3865 get_buffer_or_string_pos_byte (Lisp_Object object, Lisp_Object pos,
|
|
|
3866 unsigned int flags)
|
|
|
3867 {
|
|
|
3868 return STRINGP (object) ?
|
|
|
3869 get_string_pos_byte (object, pos, flags) :
|
|
|
3870 get_buffer_pos_byte (XBUFFER (object), pos, flags);
|
|
|
3871 }
|
|
|
3872
|
|
|
3873 void
|
|
|
3874 get_buffer_or_string_range_char (Lisp_Object object, Lisp_Object from,
|
|
826
|
3875 Lisp_Object to, Charxpos *from_out,
|
|
|
3876 Charxpos *to_out, unsigned int flags)
|
|
771
|
3877 {
|
|
|
3878 if (STRINGP (object))
|
|
|
3879 get_string_range_char (object, from, to, from_out, to_out, flags);
|
|
|
3880 else
|
|
826
|
3881 get_buffer_range_char (XBUFFER (object), from, to, from_out, to_out,
|
|
|
3882 flags);
|
|
771
|
3883 }
|
|
|
3884
|
|
|
3885 void
|
|
|
3886 get_buffer_or_string_range_byte (Lisp_Object object, Lisp_Object from,
|
|
826
|
3887 Lisp_Object to, Bytexpos *from_out,
|
|
|
3888 Bytexpos *to_out, unsigned int flags)
|
|
771
|
3889 {
|
|
|
3890 if (STRINGP (object))
|
|
|
3891 get_string_range_byte (object, from, to, from_out, to_out, flags);
|
|
|
3892 else
|
|
826
|
3893 get_buffer_range_byte (XBUFFER (object), from, to, from_out, to_out,
|
|
|
3894 flags);
|
|
771
|
3895 }
|
|
|
3896
|
|
826
|
3897 Charxpos
|
|
771
|
3898 buffer_or_string_accessible_begin_char (Lisp_Object object)
|
|
|
3899 {
|
|
|
3900 return STRINGP (object) ? 0 : BUF_BEGV (XBUFFER (object));
|
|
|
3901 }
|
|
|
3902
|
|
826
|
3903 Charxpos
|
|
771
|
3904 buffer_or_string_accessible_end_char (Lisp_Object object)
|
|
|
3905 {
|
|
|
3906 return STRINGP (object) ?
|
|
826
|
3907 string_char_length (object) : BUF_ZV (XBUFFER (object));
|
|
771
|
3908 }
|
|
|
3909
|
|
826
|
3910 Bytexpos
|
|
771
|
3911 buffer_or_string_accessible_begin_byte (Lisp_Object object)
|
|
|
3912 {
|
|
826
|
3913 return STRINGP (object) ? 0 : BYTE_BUF_BEGV (XBUFFER (object));
|
|
771
|
3914 }
|
|
|
3915
|
|
826
|
3916 Bytexpos
|
|
771
|
3917 buffer_or_string_accessible_end_byte (Lisp_Object object)
|
|
|
3918 {
|
|
|
3919 return STRINGP (object) ?
|
|
826
|
3920 XSTRING_LENGTH (object) : BYTE_BUF_ZV (XBUFFER (object));
|
|
771
|
3921 }
|
|
|
3922
|
|
826
|
3923 Charxpos
|
|
771
|
3924 buffer_or_string_absolute_begin_char (Lisp_Object object)
|
|
|
3925 {
|
|
|
3926 return STRINGP (object) ? 0 : BUF_BEG (XBUFFER (object));
|
|
|
3927 }
|
|
|
3928
|
|
826
|
3929 Charxpos
|
|
771
|
3930 buffer_or_string_absolute_end_char (Lisp_Object object)
|
|
|
3931 {
|
|
|
3932 return STRINGP (object) ?
|
|
826
|
3933 string_char_length (object) : BUF_Z (XBUFFER (object));
|
|
|
3934 }
|
|
|
3935
|
|
|
3936 Bytexpos
|
|
|
3937 buffer_or_string_absolute_begin_byte (Lisp_Object object)
|
|
|
3938 {
|
|
|
3939 return STRINGP (object) ? 0 : BYTE_BUF_BEG (XBUFFER (object));
|
|
|
3940 }
|
|
|
3941
|
|
|
3942 Bytexpos
|
|
|
3943 buffer_or_string_absolute_end_byte (Lisp_Object object)
|
|
|
3944 {
|
|
|
3945 return STRINGP (object) ?
|
|
|
3946 XSTRING_LENGTH (object) : BYTE_BUF_Z (XBUFFER (object));
|
|
|
3947 }
|
|
|
3948
|
|
|
3949 Charbpos
|
|
|
3950 charbpos_clip_to_bounds (Charbpos lower, Charbpos num, Charbpos upper)
|
|
|
3951 {
|
|
|
3952 return (num < lower ? lower :
|
|
|
3953 num > upper ? upper :
|
|
|
3954 num);
|
|
771
|
3955 }
|
|
|
3956
|
|
|
3957 Bytebpos
|
|
826
|
3958 bytebpos_clip_to_bounds (Bytebpos lower, Bytebpos num, Bytebpos upper)
|
|
|
3959 {
|
|
|
3960 return (num < lower ? lower :
|
|
|
3961 num > upper ? upper :
|
|
|
3962 num);
|
|
|
3963 }
|
|
|
3964
|
|
|
3965 Charxpos
|
|
|
3966 charxpos_clip_to_bounds (Charxpos lower, Charxpos num, Charxpos upper)
|
|
771
|
3967 {
|
|
826
|
3968 return (num < lower ? lower :
|
|
|
3969 num > upper ? upper :
|
|
|
3970 num);
|
|
|
3971 }
|
|
|
3972
|
|
|
3973 Bytexpos
|
|
|
3974 bytexpos_clip_to_bounds (Bytexpos lower, Bytexpos num, Bytexpos upper)
|
|
|
3975 {
|
|
|
3976 return (num < lower ? lower :
|
|
|
3977 num > upper ? upper :
|
|
|
3978 num);
|
|
771
|
3979 }
|
|
|
3980
|
|
826
|
3981 /* These could be implemented in terms of the get_buffer_or_string()
|
|
|
3982 functions above, but those are complicated and handle lots of weird
|
|
|
3983 cases stemming from uncertain external input. */
|
|
|
3984
|
|
|
3985 Charxpos
|
|
|
3986 buffer_or_string_clip_to_accessible_char (Lisp_Object object, Charxpos pos)
|
|
|
3987 {
|
|
|
3988 return (charxpos_clip_to_bounds
|
|
|
3989 (pos, buffer_or_string_accessible_begin_char (object),
|
|
|
3990 buffer_or_string_accessible_end_char (object)));
|
|
|
3991 }
|
|
|
3992
|
|
|
3993 Bytexpos
|
|
|
3994 buffer_or_string_clip_to_accessible_byte (Lisp_Object object, Bytexpos pos)
|
|
771
|
3995 {
|
|
826
|
3996 return (bytexpos_clip_to_bounds
|
|
|
3997 (pos, buffer_or_string_accessible_begin_byte (object),
|
|
|
3998 buffer_or_string_accessible_end_byte (object)));
|
|
|
3999 }
|
|
|
4000
|
|
|
4001 Charxpos
|
|
|
4002 buffer_or_string_clip_to_absolute_char (Lisp_Object object, Charxpos pos)
|
|
|
4003 {
|
|
|
4004 return (charxpos_clip_to_bounds
|
|
|
4005 (pos, buffer_or_string_absolute_begin_char (object),
|
|
|
4006 buffer_or_string_absolute_end_char (object)));
|
|
|
4007 }
|
|
|
4008
|
|
|
4009 Bytexpos
|
|
|
4010 buffer_or_string_clip_to_absolute_byte (Lisp_Object object, Bytexpos pos)
|
|
|
4011 {
|
|
|
4012 return (bytexpos_clip_to_bounds
|
|
|
4013 (pos, buffer_or_string_absolute_begin_byte (object),
|
|
|
4014 buffer_or_string_absolute_end_byte (object)));
|
|
771
|
4015 }
|
|
|
4016
|
|
|
4017
|
|
|
4018 /************************************************************************/
|
|
|
4019 /* Implement TO_EXTERNAL_FORMAT, TO_INTERNAL_FORMAT */
|
|
|
4020 /************************************************************************/
|
|
|
4021
|
|
|
4022 typedef struct
|
|
|
4023 {
|
|
867
|
4024 Dynarr_declare (Ibyte_dynarr *);
|
|
|
4025 } Ibyte_dynarr_dynarr;
|
|
771
|
4026
|
|
|
4027 typedef struct
|
|
|
4028 {
|
|
|
4029 Dynarr_declare (Extbyte_dynarr *);
|
|
|
4030 } Extbyte_dynarr_dynarr;
|
|
|
4031
|
|
|
4032 static Extbyte_dynarr_dynarr *conversion_out_dynarr_list;
|
|
867
|
4033 static Ibyte_dynarr_dynarr *conversion_in_dynarr_list;
|
|
771
|
4034
|
|
|
4035 static int dfc_convert_to_external_format_in_use;
|
|
|
4036 static int dfc_convert_to_internal_format_in_use;
|
|
|
4037
|
|
|
4038 void
|
|
|
4039 dfc_convert_to_external_format (dfc_conversion_type source_type,
|
|
|
4040 dfc_conversion_data *source,
|
|
|
4041 Lisp_Object coding_system,
|
|
|
4042 dfc_conversion_type sink_type,
|
|
|
4043 dfc_conversion_data *sink)
|
|
|
4044 {
|
|
|
4045 /* It's guaranteed that many callers are not prepared for GC here,
|
|
|
4046 esp. given that this code conversion occurs in many very hidden
|
|
|
4047 places. */
|
|
1292
|
4048 int count;
|
|
771
|
4049 Extbyte_dynarr *conversion_out_dynarr;
|
|
1292
|
4050 PROFILE_DECLARE ();
|
|
|
4051
|
|
2367
|
4052 assert (!inhibit_non_essential_conversion_operations);
|
|
1292
|
4053 PROFILE_RECORD_ENTERING_SECTION (QSin_internal_external_conversion);
|
|
|
4054
|
|
|
4055 count = begin_gc_forbidden ();
|
|
771
|
4056
|
|
|
4057 type_checking_assert
|
|
|
4058 (((source_type == DFC_TYPE_DATA) ||
|
|
|
4059 (source_type == DFC_TYPE_LISP_LSTREAM && LSTREAMP (source->lisp_object)) ||
|
|
|
4060 (source_type == DFC_TYPE_LISP_STRING && STRINGP (source->lisp_object)))
|
|
|
4061 &&
|
|
|
4062 ((sink_type == DFC_TYPE_DATA) ||
|
|
|
4063 (sink_type == DFC_TYPE_LISP_LSTREAM && LSTREAMP (source->lisp_object))));
|
|
|
4064
|
|
|
4065 if (Dynarr_length (conversion_out_dynarr_list) <=
|
|
|
4066 dfc_convert_to_external_format_in_use)
|
|
|
4067 Dynarr_add (conversion_out_dynarr_list, Dynarr_new (Extbyte));
|
|
|
4068 conversion_out_dynarr = Dynarr_at (conversion_out_dynarr_list,
|
|
|
4069 dfc_convert_to_external_format_in_use);
|
|
|
4070 Dynarr_reset (conversion_out_dynarr);
|
|
|
4071
|
|
853
|
4072 internal_bind_int (&dfc_convert_to_external_format_in_use,
|
|
|
4073 dfc_convert_to_external_format_in_use + 1);
|
|
|
4074
|
|
771
|
4075 coding_system = get_coding_system_for_text_file (coding_system, 0);
|
|
|
4076
|
|
|
4077 /* Here we optimize in the case where the coding system does no
|
|
|
4078 conversion. However, we don't want to optimize in case the source
|
|
|
4079 or sink is an lstream, since writing to an lstream can cause a
|
|
|
4080 garbage collection, and this could be problematic if the source
|
|
|
4081 is a lisp string. */
|
|
|
4082 if (source_type != DFC_TYPE_LISP_LSTREAM &&
|
|
|
4083 sink_type != DFC_TYPE_LISP_LSTREAM &&
|
|
|
4084 coding_system_is_binary (coding_system))
|
|
|
4085 {
|
|
867
|
4086 const Ibyte *ptr;
|
|
771
|
4087 Bytecount len;
|
|
|
4088
|
|
|
4089 if (source_type == DFC_TYPE_LISP_STRING)
|
|
|
4090 {
|
|
|
4091 ptr = XSTRING_DATA (source->lisp_object);
|
|
|
4092 len = XSTRING_LENGTH (source->lisp_object);
|
|
|
4093 }
|
|
|
4094 else
|
|
|
4095 {
|
|
867
|
4096 ptr = (Ibyte *) source->data.ptr;
|
|
771
|
4097 len = source->data.len;
|
|
|
4098 }
|
|
|
4099
|
|
|
4100 #ifdef MULE
|
|
|
4101 {
|
|
867
|
4102 const Ibyte *end;
|
|
771
|
4103 for (end = ptr + len; ptr < end;)
|
|
|
4104 {
|
|
867
|
4105 Ibyte c =
|
|
826
|
4106 (byte_ascii_p (*ptr)) ? *ptr :
|
|
771
|
4107 (*ptr == LEADING_BYTE_CONTROL_1) ? (*(ptr+1) - 0x20) :
|
|
|
4108 (*ptr == LEADING_BYTE_LATIN_ISO8859_1) ? (*(ptr+1)) :
|
|
|
4109 '~';
|
|
|
4110
|
|
|
4111 Dynarr_add (conversion_out_dynarr, (Extbyte) c);
|
|
867
|
4112 INC_IBYTEPTR (ptr);
|
|
771
|
4113 }
|
|
800
|
4114 text_checking_assert (ptr == end);
|
|
771
|
4115 }
|
|
|
4116 #else
|
|
|
4117 Dynarr_add_many (conversion_out_dynarr, ptr, len);
|
|
|
4118 #endif
|
|
|
4119
|
|
|
4120 }
|
|
1315
|
4121 #ifdef WIN32_ANY
|
|
771
|
4122 /* Optimize the common case involving Unicode where only ASCII is involved */
|
|
|
4123 else if (source_type != DFC_TYPE_LISP_LSTREAM &&
|
|
|
4124 sink_type != DFC_TYPE_LISP_LSTREAM &&
|
|
|
4125 dfc_coding_system_is_unicode (coding_system))
|
|
|
4126 {
|
|
867
|
4127 const Ibyte *ptr, *p;
|
|
771
|
4128 Bytecount len;
|
|
867
|
4129 const Ibyte *end;
|
|
771
|
4130
|
|
|
4131 if (source_type == DFC_TYPE_LISP_STRING)
|
|
|
4132 {
|
|
|
4133 ptr = XSTRING_DATA (source->lisp_object);
|
|
|
4134 len = XSTRING_LENGTH (source->lisp_object);
|
|
|
4135 }
|
|
|
4136 else
|
|
|
4137 {
|
|
867
|
4138 ptr = (Ibyte *) source->data.ptr;
|
|
771
|
4139 len = source->data.len;
|
|
|
4140 }
|
|
|
4141 end = ptr + len;
|
|
|
4142
|
|
|
4143 for (p = ptr; p < end; p++)
|
|
|
4144 {
|
|
826
|
4145 if (!byte_ascii_p (*p))
|
|
771
|
4146 goto the_hard_way;
|
|
|
4147 }
|
|
|
4148
|
|
|
4149 for (p = ptr; p < end; p++)
|
|
|
4150 {
|
|
|
4151 Dynarr_add (conversion_out_dynarr, (Extbyte) (*p));
|
|
|
4152 Dynarr_add (conversion_out_dynarr, (Extbyte) '\0');
|
|
|
4153 }
|
|
|
4154 }
|
|
1315
|
4155 #endif /* WIN32_ANY */
|
|
771
|
4156 else
|
|
|
4157 {
|
|
|
4158 Lisp_Object streams_to_delete[3];
|
|
|
4159 int delete_count;
|
|
|
4160 Lisp_Object instream, outstream;
|
|
|
4161 Lstream *reader, *writer;
|
|
|
4162
|
|
1315
|
4163 #ifdef WIN32_ANY
|
|
771
|
4164 the_hard_way:
|
|
1315
|
4165 #endif /* WIN32_ANY */
|
|
771
|
4166 delete_count = 0;
|
|
|
4167 if (source_type == DFC_TYPE_LISP_LSTREAM)
|
|
|
4168 instream = source->lisp_object;
|
|
|
4169 else if (source_type == DFC_TYPE_DATA)
|
|
|
4170 streams_to_delete[delete_count++] = instream =
|
|
|
4171 make_fixed_buffer_input_stream (source->data.ptr, source->data.len);
|
|
|
4172 else
|
|
|
4173 {
|
|
|
4174 type_checking_assert (source_type == DFC_TYPE_LISP_STRING);
|
|
|
4175 streams_to_delete[delete_count++] = instream =
|
|
|
4176 /* This will GCPRO the Lisp string */
|
|
|
4177 make_lisp_string_input_stream (source->lisp_object, 0, -1);
|
|
|
4178 }
|
|
|
4179
|
|
|
4180 if (sink_type == DFC_TYPE_LISP_LSTREAM)
|
|
|
4181 outstream = sink->lisp_object;
|
|
|
4182 else
|
|
|
4183 {
|
|
|
4184 type_checking_assert (sink_type == DFC_TYPE_DATA);
|
|
|
4185 streams_to_delete[delete_count++] = outstream =
|
|
|
4186 make_dynarr_output_stream
|
|
|
4187 ((unsigned_char_dynarr *) conversion_out_dynarr);
|
|
|
4188 }
|
|
|
4189
|
|
|
4190 streams_to_delete[delete_count++] = outstream =
|
|
800
|
4191 make_coding_output_stream (XLSTREAM (outstream), coding_system,
|
|
|
4192 CODING_ENCODE, 0);
|
|
771
|
4193
|
|
|
4194 reader = XLSTREAM (instream);
|
|
|
4195 writer = XLSTREAM (outstream);
|
|
|
4196 /* decoding_stream will gc-protect outstream */
|
|
1204
|
4197 {
|
|
|
4198 struct gcpro gcpro1, gcpro2;
|
|
|
4199 GCPRO2 (instream, outstream);
|
|
|
4200
|
|
|
4201 while (1)
|
|
|
4202 {
|
|
|
4203 Bytecount size_in_bytes;
|
|
|
4204 char tempbuf[1024]; /* some random amount */
|
|
|
4205
|
|
|
4206 size_in_bytes = Lstream_read (reader, tempbuf, sizeof (tempbuf));
|
|
|
4207
|
|
|
4208 if (size_in_bytes == 0)
|
|
|
4209 break;
|
|
|
4210 else if (size_in_bytes < 0)
|
|
|
4211 signal_error (Qtext_conversion_error,
|
|
|
4212 "Error converting to external format", Qunbound);
|
|
|
4213
|
|
|
4214 if (Lstream_write (writer, tempbuf, size_in_bytes) < 0)
|
|
|
4215 signal_error (Qtext_conversion_error,
|
|
|
4216 "Error converting to external format", Qunbound);
|
|
|
4217 }
|
|
|
4218
|
|
|
4219 /* Closing writer will close any stream at the other end of writer. */
|
|
|
4220 Lstream_close (writer);
|
|
|
4221 Lstream_close (reader);
|
|
|
4222 UNGCPRO;
|
|
|
4223 }
|
|
771
|
4224
|
|
|
4225 /* The idea is that this function will create no garbage. */
|
|
|
4226 while (delete_count)
|
|
|
4227 Lstream_delete (XLSTREAM (streams_to_delete [--delete_count]));
|
|
|
4228 }
|
|
|
4229
|
|
|
4230 unbind_to (count);
|
|
|
4231
|
|
|
4232 if (sink_type != DFC_TYPE_LISP_LSTREAM)
|
|
|
4233 {
|
|
|
4234 sink->data.len = Dynarr_length (conversion_out_dynarr);
|
|
|
4235 /* double zero-extend because we may be dealing with Unicode data */
|
|
|
4236 Dynarr_add (conversion_out_dynarr, '\0');
|
|
|
4237 Dynarr_add (conversion_out_dynarr, '\0');
|
|
|
4238 sink->data.ptr = Dynarr_atp (conversion_out_dynarr, 0);
|
|
|
4239 }
|
|
1292
|
4240
|
|
|
4241 PROFILE_RECORD_EXITING_SECTION (QSin_internal_external_conversion);
|
|
771
|
4242 }
|
|
|
4243
|
|
|
4244 void
|
|
|
4245 dfc_convert_to_internal_format (dfc_conversion_type source_type,
|
|
|
4246 dfc_conversion_data *source,
|
|
|
4247 Lisp_Object coding_system,
|
|
|
4248 dfc_conversion_type sink_type,
|
|
|
4249 dfc_conversion_data *sink)
|
|
|
4250 {
|
|
|
4251 /* It's guaranteed that many callers are not prepared for GC here,
|
|
|
4252 esp. given that this code conversion occurs in many very hidden
|
|
|
4253 places. */
|
|
1292
|
4254 int count;
|
|
867
|
4255 Ibyte_dynarr *conversion_in_dynarr;
|
|
2421
|
4256 Lisp_Object underlying_cs;
|
|
1292
|
4257 PROFILE_DECLARE ();
|
|
|
4258
|
|
2367
|
4259 assert (!inhibit_non_essential_conversion_operations);
|
|
1292
|
4260 PROFILE_RECORD_ENTERING_SECTION (QSin_internal_external_conversion);
|
|
|
4261
|
|
|
4262 count = begin_gc_forbidden ();
|
|
771
|
4263
|
|
|
4264 type_checking_assert
|
|
|
4265 ((source_type == DFC_TYPE_DATA ||
|
|
|
4266 source_type == DFC_TYPE_LISP_LSTREAM)
|
|
|
4267 &&
|
|
|
4268 (sink_type == DFC_TYPE_DATA ||
|
|
|
4269 sink_type == DFC_TYPE_LISP_LSTREAM));
|
|
|
4270
|
|
|
4271 if (Dynarr_length (conversion_in_dynarr_list) <=
|
|
|
4272 dfc_convert_to_internal_format_in_use)
|
|
867
|
4273 Dynarr_add (conversion_in_dynarr_list, Dynarr_new (Ibyte));
|
|
771
|
4274 conversion_in_dynarr = Dynarr_at (conversion_in_dynarr_list,
|
|
|
4275 dfc_convert_to_internal_format_in_use);
|
|
|
4276 Dynarr_reset (conversion_in_dynarr);
|
|
|
4277
|
|
853
|
4278 internal_bind_int (&dfc_convert_to_internal_format_in_use,
|
|
|
4279 dfc_convert_to_internal_format_in_use + 1);
|
|
|
4280
|
|
2421
|
4281 /* The second call does the equivalent of both calls, but we need
|
|
|
4282 the result after the first call (which wraps just a to-text
|
|
|
4283 converter) as well as the result after the second call (which
|
|
|
4284 also wraps an EOL-detection converter). */
|
|
|
4285 underlying_cs = get_coding_system_for_text_file (coding_system, 0);
|
|
|
4286 coding_system = get_coding_system_for_text_file (underlying_cs, 1);
|
|
771
|
4287
|
|
|
4288 if (source_type != DFC_TYPE_LISP_LSTREAM &&
|
|
|
4289 sink_type != DFC_TYPE_LISP_LSTREAM &&
|
|
2421
|
4290 coding_system_is_binary (underlying_cs))
|
|
771
|
4291 {
|
|
|
4292 #ifdef MULE
|
|
2421
|
4293 const Ibyte *ptr;
|
|
771
|
4294 Bytecount len = source->data.len;
|
|
2421
|
4295 const Ibyte *end;
|
|
|
4296
|
|
|
4297 /* Make sure no EOL conversion is needed. With a little work we
|
|
|
4298 could handle EOL conversion as well but it may not be needed as an
|
|
|
4299 optimization. */
|
|
|
4300 if (!EQ (coding_system, underlying_cs))
|
|
|
4301 {
|
|
|
4302 for (ptr = (const Ibyte *) source->data.ptr, end = ptr + len;
|
|
|
4303 ptr < end; ptr++)
|
|
|
4304 {
|
|
|
4305 if (*ptr == '\r' || *ptr == '\n')
|
|
|
4306 goto the_hard_way;
|
|
|
4307 }
|
|
|
4308 }
|
|
|
4309
|
|
|
4310 for (ptr = (const Ibyte *) source->data.ptr, end = ptr + len;
|
|
|
4311 ptr < end; ptr++)
|
|
771
|
4312 {
|
|
867
|
4313 Ibyte c = *ptr;
|
|
771
|
4314
|
|
826
|
4315 if (byte_ascii_p (c))
|
|
771
|
4316 Dynarr_add (conversion_in_dynarr, c);
|
|
826
|
4317 else if (byte_c1_p (c))
|
|
771
|
4318 {
|
|
|
4319 Dynarr_add (conversion_in_dynarr, LEADING_BYTE_CONTROL_1);
|
|
|
4320 Dynarr_add (conversion_in_dynarr, c + 0x20);
|
|
|
4321 }
|
|
|
4322 else
|
|
|
4323 {
|
|
|
4324 Dynarr_add (conversion_in_dynarr, LEADING_BYTE_LATIN_ISO8859_1);
|
|
|
4325 Dynarr_add (conversion_in_dynarr, c);
|
|
|
4326 }
|
|
|
4327 }
|
|
|
4328 #else
|
|
|
4329 Dynarr_add_many (conversion_in_dynarr, source->data.ptr, source->data.len);
|
|
|
4330 #endif
|
|
|
4331 }
|
|
1315
|
4332 #ifdef WIN32_ANY
|
|
1292
|
4333 /* Optimize the common case involving Unicode where only ASCII/Latin-1 is
|
|
|
4334 involved */
|
|
771
|
4335 else if (source_type != DFC_TYPE_LISP_LSTREAM &&
|
|
|
4336 sink_type != DFC_TYPE_LISP_LSTREAM &&
|
|
2421
|
4337 dfc_coding_system_is_unicode (underlying_cs))
|
|
771
|
4338 {
|
|
2421
|
4339 const Ibyte *ptr;
|
|
771
|
4340 Bytecount len = source->data.len;
|
|
2421
|
4341 const Ibyte *end;
|
|
771
|
4342
|
|
|
4343 if (len & 1)
|
|
|
4344 goto the_hard_way;
|
|
|
4345
|
|
2421
|
4346 /* Make sure only ASCII/Latin-1 is involved */
|
|
|
4347 for (ptr = (const Ibyte *) source->data.ptr + 1, end = ptr + len;
|
|
|
4348 ptr < end; ptr += 2)
|
|
771
|
4349 {
|
|
|
4350 if (*ptr)
|
|
|
4351 goto the_hard_way;
|
|
|
4352 }
|
|
|
4353
|
|
2421
|
4354 /* Make sure no EOL conversion is needed. With a little work we
|
|
|
4355 could handle EOL conversion as well but it may not be needed as an
|
|
|
4356 optimization. */
|
|
|
4357 if (!EQ (coding_system, underlying_cs))
|
|
|
4358 {
|
|
|
4359 for (ptr = (const Ibyte *) source->data.ptr, end = ptr + len;
|
|
|
4360 ptr < end; ptr += 2)
|
|
|
4361 {
|
|
|
4362 if (*ptr == '\r' || *ptr == '\n')
|
|
|
4363 goto the_hard_way;
|
|
|
4364 }
|
|
|
4365 }
|
|
|
4366
|
|
|
4367 for (ptr = (const Ibyte *) source->data.ptr, end = ptr + len;
|
|
|
4368 ptr < end; ptr += 2)
|
|
771
|
4369 {
|
|
867
|
4370 Ibyte c = *ptr;
|
|
771
|
4371
|
|
826
|
4372 if (byte_ascii_p (c))
|
|
771
|
4373 Dynarr_add (conversion_in_dynarr, c);
|
|
|
4374 #ifdef MULE
|
|
826
|
4375 else if (byte_c1_p (c))
|
|
771
|
4376 {
|
|
|
4377 Dynarr_add (conversion_in_dynarr, LEADING_BYTE_CONTROL_1);
|
|
|
4378 Dynarr_add (conversion_in_dynarr, c + 0x20);
|
|
|
4379 }
|
|
|
4380 else
|
|
|
4381 {
|
|
|
4382 Dynarr_add (conversion_in_dynarr, LEADING_BYTE_LATIN_ISO8859_1);
|
|
|
4383 Dynarr_add (conversion_in_dynarr, c);
|
|
|
4384 }
|
|
|
4385 #endif /* MULE */
|
|
|
4386 }
|
|
|
4387 }
|
|
1315
|
4388 #endif /* WIN32_ANY */
|
|
771
|
4389 else
|
|
|
4390 {
|
|
|
4391 Lisp_Object streams_to_delete[3];
|
|
|
4392 int delete_count;
|
|
|
4393 Lisp_Object instream, outstream;
|
|
|
4394 Lstream *reader, *writer;
|
|
|
4395
|
|
2421
|
4396 #if defined (WIN32_ANY) || defined (MULE)
|
|
771
|
4397 the_hard_way:
|
|
2421
|
4398 #endif
|
|
771
|
4399 delete_count = 0;
|
|
|
4400 if (source_type == DFC_TYPE_LISP_LSTREAM)
|
|
|
4401 instream = source->lisp_object;
|
|
|
4402 else
|
|
|
4403 {
|
|
|
4404 type_checking_assert (source_type == DFC_TYPE_DATA);
|
|
|
4405 streams_to_delete[delete_count++] = instream =
|
|
|
4406 make_fixed_buffer_input_stream (source->data.ptr, source->data.len);
|
|
|
4407 }
|
|
|
4408
|
|
|
4409 if (sink_type == DFC_TYPE_LISP_LSTREAM)
|
|
|
4410 outstream = sink->lisp_object;
|
|
|
4411 else
|
|
|
4412 {
|
|
|
4413 type_checking_assert (sink_type == DFC_TYPE_DATA);
|
|
|
4414 streams_to_delete[delete_count++] = outstream =
|
|
|
4415 make_dynarr_output_stream
|
|
|
4416 ((unsigned_char_dynarr *) conversion_in_dynarr);
|
|
|
4417 }
|
|
|
4418
|
|
|
4419 streams_to_delete[delete_count++] = outstream =
|
|
800
|
4420 make_coding_output_stream (XLSTREAM (outstream), coding_system,
|
|
|
4421 CODING_DECODE, 0);
|
|
771
|
4422
|
|
|
4423 reader = XLSTREAM (instream);
|
|
|
4424 writer = XLSTREAM (outstream);
|
|
1204
|
4425 {
|
|
|
4426 struct gcpro gcpro1, gcpro2;
|
|
|
4427 /* outstream will gc-protect its sink stream, if necessary */
|
|
|
4428 GCPRO2 (instream, outstream);
|
|
|
4429
|
|
|
4430 while (1)
|
|
|
4431 {
|
|
|
4432 Bytecount size_in_bytes;
|
|
|
4433 char tempbuf[1024]; /* some random amount */
|
|
|
4434
|
|
|
4435 size_in_bytes = Lstream_read (reader, tempbuf, sizeof (tempbuf));
|
|
|
4436
|
|
|
4437 if (size_in_bytes == 0)
|
|
|
4438 break;
|
|
|
4439 else if (size_in_bytes < 0)
|
|
|
4440 signal_error (Qtext_conversion_error,
|
|
|
4441 "Error converting to internal format", Qunbound);
|
|
|
4442
|
|
|
4443 if (Lstream_write (writer, tempbuf, size_in_bytes) < 0)
|
|
|
4444 signal_error (Qtext_conversion_error,
|
|
|
4445 "Error converting to internal format", Qunbound);
|
|
|
4446 }
|
|
|
4447
|
|
|
4448 /* Closing writer will close any stream at the other end of writer. */
|
|
|
4449 Lstream_close (writer);
|
|
|
4450 Lstream_close (reader);
|
|
|
4451 UNGCPRO;
|
|
|
4452 }
|
|
771
|
4453
|
|
|
4454 /* The idea is that this function will create no garbage. */
|
|
|
4455 while (delete_count)
|
|
|
4456 Lstream_delete (XLSTREAM (streams_to_delete [--delete_count]));
|
|
|
4457 }
|
|
|
4458
|
|
|
4459 unbind_to (count);
|
|
|
4460
|
|
|
4461 if (sink_type != DFC_TYPE_LISP_LSTREAM)
|
|
|
4462 {
|
|
|
4463 sink->data.len = Dynarr_length (conversion_in_dynarr);
|
|
|
4464 Dynarr_add (conversion_in_dynarr, '\0'); /* remember to NUL-terminate! */
|
|
|
4465 /* The macros don't currently distinguish between internal and
|
|
|
4466 external sinks, and allocate and copy two extra bytes in both
|
|
|
4467 cases. So we add a second zero, just like for external data
|
|
|
4468 (in that case, because we may be converting to Unicode). */
|
|
|
4469 Dynarr_add (conversion_in_dynarr, '\0');
|
|
|
4470 sink->data.ptr = Dynarr_atp (conversion_in_dynarr, 0);
|
|
|
4471 }
|
|
1292
|
4472
|
|
|
4473 PROFILE_RECORD_EXITING_SECTION (QSin_internal_external_conversion);
|
|
771
|
4474 }
|
|
|
4475
|
|
1318
|
4476 /* ----------------------------------------------------------------------- */
|
|
2367
|
4477 /* Alloca-conversion helpers */
|
|
|
4478 /* ----------------------------------------------------------------------- */
|
|
|
4479
|
|
|
4480 /* For alloca(), things are trickier because the calling function needs to
|
|
|
4481 allocate. This means that the caller needs to do the following:
|
|
|
4482
|
|
|
4483 (a) invoke us to do the conversion, remember the data and return the size.
|
|
|
4484 (b) alloca() the proper size.
|
|
|
4485 (c) invoke us again to copy the data.
|
|
|
4486
|
|
|
4487 We need to handle the possibility of two or more invocations of the
|
|
|
4488 converter in the same expression. In such cases it's conceivable that
|
|
|
4489 the evaluation of the sub-expressions will be overlapping (e.g. one size
|
|
|
4490 function called, then the other one called, then the copy functions
|
|
|
4491 called). To handle this, we keep a list of active data, indexed by the
|
|
|
4492 src expression. (We use the stringize operator to avoid evaluating the
|
|
|
4493 expression multiple times.) If the caller uses the exact same src
|
|
|
4494 expression twice in two converter calls in the same subexpression, we
|
|
2500
|
4495 will lose, but at least we can check for this and ABORT(). We could
|
|
2367
|
4496 conceivably try to index on other parameters as well, but there is not
|
|
|
4497 really any point. */
|
|
|
4498
|
|
|
4499 alloca_convert_vals_dynarr *active_alloca_convert;
|
|
|
4500
|
|
|
4501 int
|
|
|
4502 find_pos_of_existing_active_alloca_convert (const char *srctext)
|
|
|
4503 {
|
|
|
4504 alloca_convert_vals *vals = NULL;
|
|
|
4505 int i;
|
|
|
4506
|
|
|
4507 if (!active_alloca_convert)
|
|
|
4508 active_alloca_convert = Dynarr_new (alloca_convert_vals);
|
|
|
4509
|
|
|
4510 for (i = 0; i < Dynarr_length (active_alloca_convert); i++)
|
|
|
4511 {
|
|
|
4512 vals = Dynarr_atp (active_alloca_convert, i);
|
|
2385
|
4513 /* On my system, two different occurrences of the same stringized
|
|
|
4514 argument always point to the same string. However, on someone
|
|
|
4515 else's system, that wasn't the case. We check for equality
|
|
|
4516 first, since it seems systems work my way more than the other
|
|
|
4517 way. */
|
|
|
4518 if (vals->srctext == srctext || !strcmp (vals->srctext, srctext))
|
|
2367
|
4519 return i;
|
|
|
4520 }
|
|
|
4521
|
|
|
4522 return -1;
|
|
|
4523 }
|
|
|
4524
|
|
|
4525 /* ----------------------------------------------------------------------- */
|
|
1318
|
4526 /* New-style DFC converters (data is returned rather than stored into var) */
|
|
|
4527 /* ----------------------------------------------------------------------- */
|
|
|
4528
|
|
|
4529 /* We handle here the cases where SRC is a Lisp_Object, internal data
|
|
|
4530 (sized or unsized), or external data (sized or unsized), and return type
|
|
|
4531 is unsized alloca() or malloc() data. If the return type is a
|
|
|
4532 Lisp_Object, use build_ext_string() for unsized external data,
|
|
|
4533 make_ext_string() for sized external data. If the return type needs to
|
|
|
4534 be sized data, use the *_TO_SIZED_*() macros, and for other more
|
|
|
4535 complicated cases, use the original TO_*_FORMAT() macros. */
|
|
|
4536
|
|
|
4537 static void
|
|
|
4538 new_dfc_convert_now_damn_it (const void *src, Bytecount src_size,
|
|
|
4539 enum new_dfc_src_type type,
|
|
|
4540 void **dst, Bytecount *dst_size,
|
|
|
4541 Lisp_Object codesys)
|
|
|
4542 {
|
|
|
4543 /* #### In the case of alloca(), it would be a bit more efficient, for
|
|
|
4544 small strings, to use static Dynarr's like are used internally in
|
|
|
4545 TO_*_FORMAT(), or some other way of avoiding malloc() followed by
|
|
|
4546 free(). I doubt it really matters, though. */
|
|
|
4547
|
|
|
4548 switch (type)
|
|
|
4549 {
|
|
|
4550 case DFC_EXTERNAL:
|
|
|
4551 TO_INTERNAL_FORMAT (C_STRING, src,
|
|
|
4552 MALLOC, (*dst, *dst_size), codesys);
|
|
|
4553 break;
|
|
|
4554
|
|
|
4555 case DFC_SIZED_EXTERNAL:
|
|
|
4556 TO_INTERNAL_FORMAT (DATA, (src, src_size),
|
|
|
4557 MALLOC, (*dst, *dst_size), codesys);
|
|
|
4558 break;
|
|
|
4559
|
|
|
4560 case DFC_INTERNAL:
|
|
|
4561 TO_EXTERNAL_FORMAT (C_STRING, src,
|
|
|
4562 MALLOC, (*dst, *dst_size), codesys);
|
|
|
4563 break;
|
|
|
4564
|
|
|
4565 case DFC_SIZED_INTERNAL:
|
|
|
4566 TO_EXTERNAL_FORMAT (DATA, (src, src_size),
|
|
|
4567 MALLOC, (*dst, *dst_size), codesys);
|
|
|
4568 break;
|
|
|
4569
|
|
|
4570 case DFC_LISP_STRING:
|
|
|
4571 TO_EXTERNAL_FORMAT (LISP_STRING, VOID_TO_LISP (src),
|
|
|
4572 MALLOC, (*dst, *dst_size), codesys);
|
|
|
4573 break;
|
|
|
4574
|
|
|
4575 default:
|
|
2500
|
4576 ABORT ();
|
|
1318
|
4577 }
|
|
2367
|
4578
|
|
|
4579 /* The size is always + 2 because we have double zero-termination at the
|
|
|
4580 end of all data (for Unicode-correctness). */
|
|
|
4581 *dst_size += 2;
|
|
|
4582 }
|
|
|
4583
|
|
|
4584 Bytecount
|
|
|
4585 new_dfc_convert_size (const char *srctext, const void *src,
|
|
|
4586 Bytecount src_size, enum new_dfc_src_type type,
|
|
|
4587 Lisp_Object codesys)
|
|
|
4588 {
|
|
|
4589 alloca_convert_vals vals;
|
|
|
4590
|
|
|
4591 assert (find_pos_of_existing_active_alloca_convert (srctext) < 0);
|
|
|
4592
|
|
|
4593 vals.srctext = srctext;
|
|
|
4594
|
|
|
4595 new_dfc_convert_now_damn_it (src, src_size, type, &vals.dst, &vals.dst_size,
|
|
|
4596 codesys);
|
|
|
4597
|
|
|
4598 Dynarr_add (active_alloca_convert, vals);
|
|
|
4599 return vals.dst_size;
|
|
|
4600 }
|
|
|
4601
|
|
|
4602 void *
|
|
|
4603 new_dfc_convert_copy_data (const char *srctext, void *alloca_data)
|
|
|
4604 {
|
|
|
4605 alloca_convert_vals *vals;
|
|
|
4606 int i = find_pos_of_existing_active_alloca_convert (srctext);
|
|
|
4607
|
|
|
4608 assert (i >= 0);
|
|
|
4609 vals = Dynarr_atp (active_alloca_convert, i);
|
|
|
4610 assert (alloca_data);
|
|
|
4611 memcpy (alloca_data, vals->dst, vals->dst_size);
|
|
|
4612 xfree (vals->dst, void *);
|
|
|
4613 Dynarr_delete (active_alloca_convert, i);
|
|
|
4614 return alloca_data;
|
|
1318
|
4615 }
|
|
|
4616
|
|
|
4617 void *
|
|
|
4618 new_dfc_convert_malloc (const void *src, Bytecount src_size,
|
|
|
4619 enum new_dfc_src_type type, Lisp_Object codesys)
|
|
|
4620 {
|
|
|
4621 void *dst;
|
|
|
4622 Bytecount dst_size;
|
|
|
4623
|
|
|
4624 new_dfc_convert_now_damn_it (src, src_size, type, &dst, &dst_size, codesys);
|
|
|
4625 return dst;
|
|
|
4626 }
|
|
|
4627
|
|
771
|
4628
|
|
|
4629 /************************************************************************/
|
|
867
|
4630 /* Basic Ichar functions */
|
|
771
|
4631 /************************************************************************/
|
|
|
4632
|
|
|
4633 #ifdef MULE
|
|
|
4634
|
|
|
4635 /* Convert a non-ASCII Mule character C into a one-character Mule-encoded
|
|
|
4636 string in STR. Returns the number of bytes stored.
|
|
867
|
4637 Do not call this directly. Use the macro set_itext_ichar() instead.
|
|
771
|
4638 */
|
|
|
4639
|
|
|
4640 Bytecount
|
|
867
|
4641 non_ascii_set_itext_ichar (Ibyte *str, Ichar c)
|
|
771
|
4642 {
|
|
867
|
4643 Ibyte *p;
|
|
|
4644 Ibyte lb;
|
|
771
|
4645 int c1, c2;
|
|
|
4646 Lisp_Object charset;
|
|
|
4647
|
|
|
4648 p = str;
|
|
867
|
4649 BREAKUP_ICHAR (c, charset, c1, c2);
|
|
|
4650 lb = ichar_leading_byte (c);
|
|
826
|
4651 if (leading_byte_private_p (lb))
|
|
|
4652 *p++ = private_leading_byte_prefix (lb);
|
|
771
|
4653 *p++ = lb;
|
|
|
4654 if (EQ (charset, Vcharset_control_1))
|
|
|
4655 c1 += 0x20;
|
|
|
4656 *p++ = c1 | 0x80;
|
|
|
4657 if (c2)
|
|
|
4658 *p++ = c2 | 0x80;
|
|
|
4659
|
|
|
4660 return (p - str);
|
|
|
4661 }
|
|
|
4662
|
|
|
4663 /* Return the first character from a Mule-encoded string in STR,
|
|
|
4664 assuming it's non-ASCII. Do not call this directly.
|
|
867
|
4665 Use the macro itext_ichar() instead. */
|
|
|
4666
|
|
|
4667 Ichar
|
|
|
4668 non_ascii_itext_ichar (const Ibyte *str)
|
|
771
|
4669 {
|
|
867
|
4670 Ibyte i0 = *str, i1, i2 = 0;
|
|
771
|
4671 Lisp_Object charset;
|
|
|
4672
|
|
|
4673 if (i0 == LEADING_BYTE_CONTROL_1)
|
|
867
|
4674 return (Ichar) (*++str - 0x20);
|
|
771
|
4675
|
|
826
|
4676 if (leading_byte_prefix_p (i0))
|
|
771
|
4677 i0 = *++str;
|
|
|
4678
|
|
|
4679 i1 = *++str & 0x7F;
|
|
|
4680
|
|
826
|
4681 charset = charset_by_leading_byte (i0);
|
|
771
|
4682 if (XCHARSET_DIMENSION (charset) == 2)
|
|
|
4683 i2 = *++str & 0x7F;
|
|
|
4684
|
|
867
|
4685 return make_ichar (charset, i1, i2);
|
|
771
|
4686 }
|
|
|
4687
|
|
867
|
4688 /* Return whether CH is a valid Ichar, assuming it's non-ASCII.
|
|
|
4689 Do not call this directly. Use the macro valid_ichar_p() instead. */
|
|
771
|
4690
|
|
|
4691 int
|
|
867
|
4692 non_ascii_valid_ichar_p (Ichar ch)
|
|
771
|
4693 {
|
|
|
4694 int f1, f2, f3;
|
|
|
4695
|
|
|
4696 /* Must have only lowest 19 bits set */
|
|
|
4697 if (ch & ~0x7FFFF)
|
|
|
4698 return 0;
|
|
|
4699
|
|
867
|
4700 f1 = ichar_field1 (ch);
|
|
|
4701 f2 = ichar_field2 (ch);
|
|
|
4702 f3 = ichar_field3 (ch);
|
|
771
|
4703
|
|
|
4704 if (f1 == 0)
|
|
|
4705 {
|
|
|
4706 /* dimension-1 char */
|
|
|
4707 Lisp_Object charset;
|
|
|
4708
|
|
|
4709 /* leading byte must be correct */
|
|
867
|
4710 if (f2 < MIN_ICHAR_FIELD2_OFFICIAL ||
|
|
|
4711 (f2 > MAX_ICHAR_FIELD2_OFFICIAL && f2 < MIN_ICHAR_FIELD2_PRIVATE) ||
|
|
|
4712 f2 > MAX_ICHAR_FIELD2_PRIVATE)
|
|
771
|
4713 return 0;
|
|
|
4714 /* octet not out of range */
|
|
|
4715 if (f3 < 0x20)
|
|
|
4716 return 0;
|
|
|
4717 /* charset exists */
|
|
|
4718 /*
|
|
|
4719 NOTE: This takes advantage of the fact that
|
|
|
4720 FIELD2_TO_OFFICIAL_LEADING_BYTE and
|
|
|
4721 FIELD2_TO_PRIVATE_LEADING_BYTE are the same.
|
|
|
4722 */
|
|
826
|
4723 charset = charset_by_leading_byte (f2 + FIELD2_TO_OFFICIAL_LEADING_BYTE);
|
|
771
|
4724 if (EQ (charset, Qnil))
|
|
|
4725 return 0;
|
|
|
4726 /* check range as per size (94 or 96) of charset */
|
|
|
4727 return ((f3 > 0x20 && f3 < 0x7f) || XCHARSET_CHARS (charset) == 96);
|
|
|
4728 }
|
|
|
4729 else
|
|
|
4730 {
|
|
|
4731 /* dimension-2 char */
|
|
|
4732 Lisp_Object charset;
|
|
|
4733
|
|
|
4734 /* leading byte must be correct */
|
|
867
|
4735 if (f1 < MIN_ICHAR_FIELD1_OFFICIAL ||
|
|
|
4736 (f1 > MAX_ICHAR_FIELD1_OFFICIAL && f1 < MIN_ICHAR_FIELD1_PRIVATE) ||
|
|
|
4737 f1 > MAX_ICHAR_FIELD1_PRIVATE)
|
|
771
|
4738 return 0;
|
|
|
4739 /* octets not out of range */
|
|
|
4740 if (f2 < 0x20 || f3 < 0x20)
|
|
|
4741 return 0;
|
|
|
4742
|
|
|
4743 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
4744 if (f1 + FIELD1_TO_OFFICIAL_LEADING_BYTE == LEADING_BYTE_COMPOSITE)
|
|
|
4745 {
|
|
|
4746 if (UNBOUNDP (Fgethash (make_int (ch),
|
|
|
4747 Vcomposite_char_char2string_hash_table,
|
|
|
4748 Qunbound)))
|
|
|
4749 return 0;
|
|
|
4750 return 1;
|
|
|
4751 }
|
|
|
4752 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
4753
|
|
|
4754 /* charset exists */
|
|
867
|
4755 if (f1 <= MAX_ICHAR_FIELD1_OFFICIAL)
|
|
771
|
4756 charset =
|
|
826
|
4757 charset_by_leading_byte (f1 + FIELD1_TO_OFFICIAL_LEADING_BYTE);
|
|
771
|
4758 else
|
|
|
4759 charset =
|
|
826
|
4760 charset_by_leading_byte (f1 + FIELD1_TO_PRIVATE_LEADING_BYTE);
|
|
771
|
4761
|
|
|
4762 if (EQ (charset, Qnil))
|
|
|
4763 return 0;
|
|
|
4764 /* check range as per size (94x94 or 96x96) of charset */
|
|
|
4765 return ((f2 != 0x20 && f2 != 0x7F && f3 != 0x20 && f3 != 0x7F) ||
|
|
|
4766 XCHARSET_CHARS (charset) == 96);
|
|
|
4767 }
|
|
|
4768 }
|
|
|
4769
|
|
|
4770 /* Copy the character pointed to by SRC into DST. Do not call this
|
|
867
|
4771 directly. Use the macro itext_copy_ichar() instead.
|
|
771
|
4772 Return the number of bytes copied. */
|
|
|
4773
|
|
|
4774 Bytecount
|
|
867
|
4775 non_ascii_itext_copy_ichar (const Ibyte *src, Ibyte *dst)
|
|
771
|
4776 {
|
|
826
|
4777 Bytecount bytes = rep_bytes_by_first_byte (*src);
|
|
771
|
4778 Bytecount i;
|
|
|
4779 for (i = bytes; i; i--, dst++, src++)
|
|
|
4780 *dst = *src;
|
|
|
4781 return bytes;
|
|
|
4782 }
|
|
|
4783
|
|
|
4784 #endif /* MULE */
|
|
|
4785
|
|
|
4786
|
|
|
4787 /************************************************************************/
|
|
867
|
4788 /* streams of Ichars */
|
|
771
|
4789 /************************************************************************/
|
|
|
4790
|
|
|
4791 #ifdef MULE
|
|
|
4792
|
|
867
|
4793 /* Treat a stream as a stream of Ichar's rather than a stream of bytes.
|
|
771
|
4794 The functions below are not meant to be called directly; use
|
|
|
4795 the macros in insdel.h. */
|
|
|
4796
|
|
867
|
4797 Ichar
|
|
|
4798 Lstream_get_ichar_1 (Lstream *stream, int ch)
|
|
771
|
4799 {
|
|
867
|
4800 Ibyte str[MAX_ICHAR_LEN];
|
|
|
4801 Ibyte *strptr = str;
|
|
771
|
4802 Bytecount bytes;
|
|
|
4803
|
|
867
|
4804 str[0] = (Ibyte) ch;
|
|
771
|
4805
|
|
826
|
4806 for (bytes = rep_bytes_by_first_byte (ch) - 1; bytes; bytes--)
|
|
771
|
4807 {
|
|
|
4808 int c = Lstream_getc (stream);
|
|
800
|
4809 text_checking_assert (c >= 0);
|
|
867
|
4810 *++strptr = (Ibyte) c;
|
|
771
|
4811 }
|
|
867
|
4812 return itext_ichar (str);
|
|
771
|
4813 }
|
|
|
4814
|
|
|
4815 int
|
|
867
|
4816 Lstream_fput_ichar (Lstream *stream, Ichar ch)
|
|
771
|
4817 {
|
|
867
|
4818 Ibyte str[MAX_ICHAR_LEN];
|
|
|
4819 Bytecount len = set_itext_ichar (str, ch);
|
|
771
|
4820 return Lstream_write (stream, str, len);
|
|
|
4821 }
|
|
|
4822
|
|
|
4823 void
|
|
867
|
4824 Lstream_funget_ichar (Lstream *stream, Ichar ch)
|
|
771
|
4825 {
|
|
867
|
4826 Ibyte str[MAX_ICHAR_LEN];
|
|
|
4827 Bytecount len = set_itext_ichar (str, ch);
|
|
771
|
4828 Lstream_unread (stream, str, len);
|
|
|
4829 }
|
|
|
4830
|
|
|
4831 #endif /* MULE */
|
|
|
4832
|
|
|
4833
|
|
|
4834 /************************************************************************/
|
|
|
4835 /* Lisp primitives for working with characters */
|
|
|
4836 /************************************************************************/
|
|
|
4837
|
|
|
4838 DEFUN ("make-char", Fmake_char, 2, 3, 0, /*
|
|
|
4839 Make a character from CHARSET and octets ARG1 and ARG2.
|
|
|
4840 ARG2 is required only for characters from two-dimensional charsets.
|
|
|
4841
|
|
|
4842 Each octet should be in the range 32 through 127 for a 96 or 96x96
|
|
|
4843 charset and 33 through 126 for a 94 or 94x94 charset. (Most charsets
|
|
|
4844 are either 96 or 94x94.) Note that this is 32 more than the values
|
|
|
4845 typically given for 94x94 charsets. When two octets are required, the
|
|
|
4846 order is "standard" -- the same as appears in ISO-2022 encodings,
|
|
|
4847 reference tables, etc.
|
|
|
4848
|
|
|
4849 \(Note the following non-obvious result: Computerized translation
|
|
|
4850 tables often encode the two octets as the high and low bytes,
|
|
|
4851 respectively, of a hex short, while when there's only one octet, it
|
|
|
4852 goes in the low byte. When decoding such a value, you need to treat
|
|
|
4853 the two cases differently when calling make-char: One is (make-char
|
|
|
4854 CHARSET HIGH LOW), the other is (make-char CHARSET LOW).)
|
|
|
4855
|
|
|
4856 For example, (make-char 'latin-iso8859-2 185) or (make-char
|
|
|
4857 'latin-iso8859-2 57) will return the Latin 2 character s with caron.
|
|
|
4858
|
|
|
4859 As another example, the Japanese character for "kawa" (stream), which
|
|
|
4860 looks something like this:
|
|
|
4861
|
|
|
4862 | |
|
|
|
4863 | | |
|
|
|
4864 | | |
|
|
|
4865 | | |
|
|
|
4866 / |
|
|
|
4867
|
|
|
4868 appears in the Unicode Standard (version 2.0) on page 7-287 with the
|
|
|
4869 following values (see also page 7-4):
|
|
|
4870
|
|
|
4871 U 5DDD (Unicode)
|
|
|
4872 G 0-2008 (GB 2312-80)
|
|
|
4873 J 0-3278 (JIS X 0208-1990)
|
|
|
4874 K 0-8425 (KS C 5601-1987)
|
|
|
4875 B A474 (Big Five)
|
|
|
4876 C 1-4455 (CNS 11643-1986 (1st plane))
|
|
|
4877 A 213C34 (ANSI Z39.64-1989)
|
|
|
4878
|
|
|
4879 These are equivalent to:
|
|
|
4880
|
|
|
4881 \(make-char 'chinese-gb2312 52 40)
|
|
|
4882 \(make-char 'japanese-jisx0208 64 110)
|
|
|
4883 \(make-char 'korean-ksc5601 116 57)
|
|
|
4884 \(make-char 'chinese-cns11643-1 76 87)
|
|
|
4885 \(decode-big5-char '(164 . 116))
|
|
|
4886
|
|
|
4887 \(All codes above are two decimal numbers except for Big Five and ANSI
|
|
|
4888 Z39.64, which we don't support. We add 32 to each of the decimal
|
|
|
4889 numbers. Big Five is split in a rather hackish fashion into two
|
|
|
4890 charsets, `big5-1' and `big5-2', due to its excessive size -- 94x157,
|
|
|
4891 with the first codepoint in the range 0xA1 to 0xFE and the second in
|
|
|
4892 the range 0x40 to 0x7E or 0xA1 to 0xFE. `decode-big5-char' is used to
|
|
|
4893 generate the char from its codes, and `encode-big5-char' extracts the
|
|
|
4894 codes.)
|
|
|
4895
|
|
|
4896 When compiled without MULE, this function does not do much, but it's
|
|
|
4897 provided for compatibility. In this case, the following CHARSET symbols
|
|
|
4898 are allowed:
|
|
|
4899
|
|
|
4900 `ascii' -- ARG1 should be in the range 0 through 127.
|
|
|
4901 `control-1' -- ARG1 should be in the range 128 through 159.
|
|
|
4902 else -- ARG1 is coerced to be between 0 and 255, and then the high
|
|
|
4903 bit is set.
|
|
|
4904
|
|
|
4905 `int-to-char of the resulting ARG1' is returned, and ARG2 is always ignored.
|
|
|
4906 */
|
|
2333
|
4907 (charset, arg1, USED_IF_MULE (arg2)))
|
|
771
|
4908 {
|
|
|
4909 #ifdef MULE
|
|
|
4910 Lisp_Charset *cs;
|
|
|
4911 int a1, a2;
|
|
|
4912 int lowlim, highlim;
|
|
|
4913
|
|
|
4914 charset = Fget_charset (charset);
|
|
|
4915 cs = XCHARSET (charset);
|
|
|
4916
|
|
788
|
4917 get_charset_limits (charset, &lowlim, &highlim);
|
|
771
|
4918
|
|
|
4919 CHECK_INT (arg1);
|
|
|
4920 /* It is useful (and safe, according to Olivier Galibert) to strip
|
|
|
4921 the 8th bit off ARG1 and ARG2 because it allows programmers to
|
|
|
4922 write (make-char 'latin-iso8859-2 CODE) where code is the actual
|
|
|
4923 Latin 2 code of the character. */
|
|
|
4924 a1 = XINT (arg1) & 0x7f;
|
|
|
4925 if (a1 < lowlim || a1 > highlim)
|
|
|
4926 args_out_of_range_3 (arg1, make_int (lowlim), make_int (highlim));
|
|
|
4927
|
|
|
4928 if (CHARSET_DIMENSION (cs) == 1)
|
|
|
4929 {
|
|
|
4930 if (!NILP (arg2))
|
|
|
4931 invalid_argument
|
|
|
4932 ("Charset is of dimension one; second octet must be nil", arg2);
|
|
867
|
4933 return make_char (make_ichar (charset, a1, 0));
|
|
771
|
4934 }
|
|
|
4935
|
|
|
4936 CHECK_INT (arg2);
|
|
|
4937 a2 = XINT (arg2) & 0x7f;
|
|
|
4938 if (a2 < lowlim || a2 > highlim)
|
|
|
4939 args_out_of_range_3 (arg2, make_int (lowlim), make_int (highlim));
|
|
|
4940
|
|
867
|
4941 return make_char (make_ichar (charset, a1, a2));
|
|
771
|
4942 #else
|
|
|
4943 int a1;
|
|
|
4944 int lowlim, highlim;
|
|
|
4945
|
|
|
4946 if (EQ (charset, Qascii)) lowlim = 0, highlim = 127;
|
|
|
4947 else if (EQ (charset, Qcontrol_1)) lowlim = 0, highlim = 31;
|
|
|
4948 else lowlim = 0, highlim = 127;
|
|
|
4949
|
|
|
4950 CHECK_INT (arg1);
|
|
|
4951 /* It is useful (and safe, according to Olivier Galibert) to strip
|
|
|
4952 the 8th bit off ARG1 and ARG2 because it allows programmers to
|
|
|
4953 write (make-char 'latin-iso8859-2 CODE) where code is the actual
|
|
|
4954 Latin 2 code of the character. */
|
|
|
4955 a1 = XINT (arg1) & 0x7f;
|
|
|
4956 if (a1 < lowlim || a1 > highlim)
|
|
|
4957 args_out_of_range_3 (arg1, make_int (lowlim), make_int (highlim));
|
|
|
4958
|
|
|
4959 if (EQ (charset, Qascii))
|
|
|
4960 return make_char (a1);
|
|
|
4961 return make_char (a1 + 128);
|
|
|
4962 #endif /* MULE */
|
|
|
4963 }
|
|
|
4964
|
|
|
4965 #ifdef MULE
|
|
|
4966
|
|
|
4967 DEFUN ("char-charset", Fchar_charset, 1, 1, 0, /*
|
|
|
4968 Return the character set of char CH.
|
|
|
4969 */
|
|
|
4970 (ch))
|
|
|
4971 {
|
|
|
4972 CHECK_CHAR_COERCE_INT (ch);
|
|
|
4973
|
|
826
|
4974 return XCHARSET_NAME (charset_by_leading_byte
|
|
867
|
4975 (ichar_leading_byte (XCHAR (ch))));
|
|
771
|
4976 }
|
|
|
4977
|
|
|
4978 DEFUN ("char-octet", Fchar_octet, 1, 2, 0, /*
|
|
|
4979 Return the octet numbered N (should be 0 or 1) of char CH.
|
|
|
4980 N defaults to 0 if omitted.
|
|
|
4981 */
|
|
|
4982 (ch, n))
|
|
|
4983 {
|
|
|
4984 Lisp_Object charset;
|
|
|
4985 int octet0, octet1;
|
|
|
4986
|
|
|
4987 CHECK_CHAR_COERCE_INT (ch);
|
|
|
4988
|
|
867
|
4989 BREAKUP_ICHAR (XCHAR (ch), charset, octet0, octet1);
|
|
771
|
4990
|
|
|
4991 if (NILP (n) || EQ (n, Qzero))
|
|
|
4992 return make_int (octet0);
|
|
|
4993 else if (EQ (n, make_int (1)))
|
|
|
4994 return make_int (octet1);
|
|
|
4995 else
|
|
|
4996 invalid_constant ("Octet number must be 0 or 1", n);
|
|
|
4997 }
|
|
|
4998
|
|
|
4999 DEFUN ("split-char", Fsplit_char, 1, 1, 0, /*
|
|
|
5000 Return list of charset and one or two position-codes of CHAR.
|
|
|
5001 */
|
|
|
5002 (character))
|
|
|
5003 {
|
|
|
5004 /* This function can GC */
|
|
|
5005 struct gcpro gcpro1, gcpro2;
|
|
|
5006 Lisp_Object charset = Qnil;
|
|
|
5007 Lisp_Object rc = Qnil;
|
|
|
5008 int c1, c2;
|
|
|
5009
|
|
|
5010 GCPRO2 (charset, rc);
|
|
|
5011 CHECK_CHAR_COERCE_INT (character);
|
|
|
5012
|
|
867
|
5013 BREAKUP_ICHAR (XCHAR (character), charset, c1, c2);
|
|
771
|
5014
|
|
|
5015 if (XCHARSET_DIMENSION (Fget_charset (charset)) == 2)
|
|
|
5016 {
|
|
|
5017 rc = list3 (XCHARSET_NAME (charset), make_int (c1), make_int (c2));
|
|
|
5018 }
|
|
|
5019 else
|
|
|
5020 {
|
|
|
5021 rc = list2 (XCHARSET_NAME (charset), make_int (c1));
|
|
|
5022 }
|
|
|
5023 UNGCPRO;
|
|
|
5024
|
|
|
5025 return rc;
|
|
|
5026 }
|
|
|
5027
|
|
|
5028 #endif /* MULE */
|
|
|
5029
|
|
|
5030
|
|
|
5031 /************************************************************************/
|
|
|
5032 /* composite character functions */
|
|
|
5033 /************************************************************************/
|
|
|
5034
|
|
|
5035 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
5036
|
|
867
|
5037 Ichar
|
|
|
5038 lookup_composite_char (Ibyte *str, int len)
|
|
771
|
5039 {
|
|
|
5040 Lisp_Object lispstr = make_string (str, len);
|
|
|
5041 Lisp_Object ch = Fgethash (lispstr,
|
|
|
5042 Vcomposite_char_string2char_hash_table,
|
|
|
5043 Qunbound);
|
|
867
|
5044 Ichar emch;
|
|
771
|
5045
|
|
|
5046 if (UNBOUNDP (ch))
|
|
|
5047 {
|
|
|
5048 if (composite_char_row_next >= 128)
|
|
|
5049 invalid_operation ("No more composite chars available", lispstr);
|
|
867
|
5050 emch = make_ichar (Vcharset_composite, composite_char_row_next,
|
|
771
|
5051 composite_char_col_next);
|
|
|
5052 Fputhash (make_char (emch), lispstr,
|
|
|
5053 Vcomposite_char_char2string_hash_table);
|
|
|
5054 Fputhash (lispstr, make_char (emch),
|
|
|
5055 Vcomposite_char_string2char_hash_table);
|
|
|
5056 composite_char_col_next++;
|
|
|
5057 if (composite_char_col_next >= 128)
|
|
|
5058 {
|
|
|
5059 composite_char_col_next = 32;
|
|
|
5060 composite_char_row_next++;
|
|
|
5061 }
|
|
|
5062 }
|
|
|
5063 else
|
|
|
5064 emch = XCHAR (ch);
|
|
|
5065 return emch;
|
|
|
5066 }
|
|
|
5067
|
|
|
5068 Lisp_Object
|
|
867
|
5069 composite_char_string (Ichar ch)
|
|
771
|
5070 {
|
|
|
5071 Lisp_Object str = Fgethash (make_char (ch),
|
|
|
5072 Vcomposite_char_char2string_hash_table,
|
|
|
5073 Qunbound);
|
|
|
5074 assert (!UNBOUNDP (str));
|
|
|
5075 return str;
|
|
|
5076 }
|
|
|
5077
|
|
826
|
5078 DEFUN ("make-composite-char", Fmake_composite_char, 1, 1, 0, /*
|
|
771
|
5079 Convert a string into a single composite character.
|
|
|
5080 The character is the result of overstriking all the characters in
|
|
|
5081 the string.
|
|
|
5082 */
|
|
|
5083 (string))
|
|
|
5084 {
|
|
|
5085 CHECK_STRING (string);
|
|
|
5086 return make_char (lookup_composite_char (XSTRING_DATA (string),
|
|
|
5087 XSTRING_LENGTH (string)));
|
|
|
5088 }
|
|
|
5089
|
|
826
|
5090 DEFUN ("composite-char-string", Fcomposite_char_string, 1, 1, 0, /*
|
|
771
|
5091 Return a string of the characters comprising a composite character.
|
|
|
5092 */
|
|
|
5093 (ch))
|
|
|
5094 {
|
|
867
|
5095 Ichar emch;
|
|
771
|
5096
|
|
|
5097 CHECK_CHAR (ch);
|
|
|
5098 emch = XCHAR (ch);
|
|
867
|
5099 if (ichar_leading_byte (emch) != LEADING_BYTE_COMPOSITE)
|
|
771
|
5100 invalid_argument ("Must be composite char", ch);
|
|
|
5101 return composite_char_string (emch);
|
|
|
5102 }
|
|
|
5103 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
5104
|
|
|
5105
|
|
|
5106 /************************************************************************/
|
|
|
5107 /* initialization */
|
|
|
5108 /************************************************************************/
|
|
|
5109
|
|
|
5110 void
|
|
1204
|
5111 reinit_eistring_early (void)
|
|
771
|
5112 {
|
|
|
5113 the_eistring_malloc_zero_init = the_eistring_zero_init;
|
|
|
5114 the_eistring_malloc_zero_init.mallocp_ = 1;
|
|
|
5115 }
|
|
|
5116
|
|
|
5117 void
|
|
814
|
5118 init_eistring_once_early (void)
|
|
|
5119 {
|
|
1204
|
5120 reinit_eistring_early ();
|
|
814
|
5121 }
|
|
|
5122
|
|
|
5123 void
|
|
771
|
5124 syms_of_text (void)
|
|
|
5125 {
|
|
|
5126 DEFSUBR (Fmake_char);
|
|
|
5127
|
|
|
5128 #ifdef MULE
|
|
|
5129 DEFSUBR (Fchar_charset);
|
|
|
5130 DEFSUBR (Fchar_octet);
|
|
|
5131 DEFSUBR (Fsplit_char);
|
|
|
5132
|
|
|
5133 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
5134 DEFSUBR (Fmake_composite_char);
|
|
|
5135 DEFSUBR (Fcomposite_char_string);
|
|
|
5136 #endif
|
|
|
5137 #endif /* MULE */
|
|
|
5138 }
|
|
|
5139
|
|
|
5140 void
|
|
|
5141 reinit_vars_of_text (void)
|
|
|
5142 {
|
|
|
5143 int i;
|
|
|
5144
|
|
867
|
5145 conversion_in_dynarr_list = Dynarr_new2 (Ibyte_dynarr_dynarr,
|
|
|
5146 Ibyte_dynarr *);
|
|
771
|
5147 conversion_out_dynarr_list = Dynarr_new2 (Extbyte_dynarr_dynarr,
|
|
|
5148 Extbyte_dynarr *);
|
|
|
5149
|
|
|
5150 for (i = 0; i <= MAX_BYTEBPOS_GAP_SIZE_3; i++)
|
|
|
5151 three_to_one_table[i] = i / 3;
|
|
|
5152 }
|
|
|
5153
|
|
|
5154 void
|
|
|
5155 vars_of_text (void)
|
|
|
5156 {
|
|
1292
|
5157 QSin_char_byte_conversion = build_msg_string ("(in char-byte conversion)");
|
|
|
5158 staticpro (&QSin_char_byte_conversion);
|
|
|
5159 QSin_internal_external_conversion =
|
|
|
5160 build_msg_string ("(in internal-external conversion)");
|
|
|
5161 staticpro (&QSin_internal_external_conversion);
|
|
|
5162
|
|
771
|
5163 #ifdef ENABLE_COMPOSITE_CHARS
|
|
|
5164 /* #### not dumped properly */
|
|
|
5165 composite_char_row_next = 32;
|
|
|
5166 composite_char_col_next = 32;
|
|
|
5167
|
|
|
5168 Vcomposite_char_string2char_hash_table =
|
|
|
5169 make_lisp_hash_table (500, HASH_TABLE_NON_WEAK, HASH_TABLE_EQUAL);
|
|
|
5170 Vcomposite_char_char2string_hash_table =
|
|
|
5171 make_lisp_hash_table (500, HASH_TABLE_NON_WEAK, HASH_TABLE_EQ);
|
|
|
5172 staticpro (&Vcomposite_char_string2char_hash_table);
|
|
|
5173 staticpro (&Vcomposite_char_char2string_hash_table);
|
|
|
5174 #endif /* ENABLE_COMPOSITE_CHARS */
|
|
|
5175 }
|
