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771
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1 /* Text encoding conversion functions; coding-system object.
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2 #### rename me to coding-system.c or coding.c
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428
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3 Copyright (C) 1991, 1995 Free Software Foundation, Inc.
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4 Copyright (C) 1995 Sun Microsystems, Inc.
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771
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5 Copyright (C) 2000, 2001, 2002 Ben Wing.
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428
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6
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7 This file is part of XEmacs.
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8
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9 XEmacs is free software; you can redistribute it and/or modify it
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10 under the terms of the GNU General Public License as published by the
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11 Free Software Foundation; either version 2, or (at your option) any
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12 later version.
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13
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14 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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17 for more details.
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18
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19 You should have received a copy of the GNU General Public License
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20 along with XEmacs; see the file COPYING. If not, write to
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21 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 Boston, MA 02111-1307, USA. */
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23
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771
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24 /* Synched up with: Not in FSF. */
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25
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26 /* Authorship:
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27
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28 Current primary author: Ben Wing <ben@xemacs.org>
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29
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30 Rewritten by Ben Wing <ben@xemacs.org>, based originally on coding.c
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31 from Mule 2.? but probably does not share one line of code with that
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32 original source. Rewriting work started around Dec. 1994. or Jan. 1995.
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33 Proceeded in earnest till Nov. 1995.
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34
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35 Around Feb. 17, 1998, Andy Piper renamed what was then mule-coding.c to
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36 file-coding.c, with the intention of using it to do end-of-line conversion
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37 on non-MULE machines (specifically, on Windows machines). He separated
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38 out the MULE stuff from non-MULE using ifdef's, and searched throughout
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39 the rest of the source tree looking for coding-system-related code that
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40 was ifdef MULE but should be ifdef HAVE_CODING_SYSTEMS.
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41
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42 Sept. 4 - 8, 1998, Tomohiko Morioka added the UCS_4 and UTF_8 coding system
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43 types, providing a primitive means of decoding and encoding externally-
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44 formatted Unicode/UCS_4 and Unicode/UTF_8 data.
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45
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46 January 25, 2000, Martin Buchholz redid and fleshed out the coding
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47 system alias handling that was first added in prototype form by
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48 Hrjove Niksic, April 15, 1999.
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49
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50 April to May 2000, Ben Wing: More major reorganization. Adding features
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51 needed for MS Windows (multibyte, unicode, unicode-to-multibyte), the
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52 "chain" coding system for chaining two together, and doing a lot of
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53 reorganization in preparation for properly abstracting out the different
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54 coding system types.
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55
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56 June 2001, Ben Wing: Added Unicode support. Eliminated previous
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57 junky Unicode translation support.
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58
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59 August 2001, Ben Wing: Moved Unicode support to unicode.c. Finished
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60 abstracting everything except detection, which is hard to abstract (see
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61 just below).
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62
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63 September 2001, Ben Wing: Moved Mule code to mule-coding.c, Windows code
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64 to intl-win32.c. Lots more rewriting; very little code is untouched
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65 from before April 2000. Abstracted the detection code, added multiple
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66 levels of likelihood to increase the reliability of the algorithm.
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67
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68 October 2001, Ben Wing: HAVE_CODING_SYSTEMS is always now defined.
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69 Removed the conditionals.
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70 */
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71
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72 /* Comments about future work
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73
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74 ------------------------------------------------------------------
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75 ABOUT DETECTION
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76 ------------------------------------------------------------------
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77
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78 however, in general the detection code has major problems and needs lots
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79 of work:
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80
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81 -- instead of merely "yes" or "no" for particular categories, we need a
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82 more flexible system, with various levels of likelihood. Currently
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83 I've created a system with six levels, as follows:
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84
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85 [see file-coding.h]
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86
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87 Let's consider what this might mean for an ASCII text detector. (In
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88 order to have accurate detection, especially given the iteration I
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89 proposed below, we need active detectors for *all* types of data we
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90 might reasonably encounter, such as ASCII text files, binary files,
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91 and possibly other sorts of ASCII files, and not assume that simply
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92 "falling back to no detection" will work at all well.)
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93
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94 An ASCII text detector DOES NOT report ASCII text as level 0, since
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95 that's what the detector is looking for. Such a detector ideally
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96 wants all bytes in the range 0x20 - 0x7E (no high bytes!), except for
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97 whitespace control chars and perhaps a few others; LF, CR, or CRLF
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98 sequences at regular intervals (where "regular" might mean an average
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99 < 100 chars and 99% < 300 for code and other stuff of the "text file
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100 w/line breaks" variety, but for the "text file w/o line breaks"
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101 variety, excluding blank lines, averages could easily be 600 or more
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102 with 2000-3000 char "lines" not so uncommon); similar statistical
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103 variance between odds and evens (not Unicode); frequent occurrences of
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104 the space character; letters more common than non-letters; etc. Also
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105 checking for too little variability between frequencies of characters
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106 and for exclusion of particular characters based on character ranges
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107 can catch ASCII encodings like base-64, UUEncode, UTF-7, etc.
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108 Granted, this doesn't even apply to everything called "ASCII", and we
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109 could potentially distinguish off ASCII for code, ASCII for text,
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110 etc. as separate categories. However, it does give us a lot to work
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111 off of, in deciding what likelihood to choose -- and it shows there's
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112 in fact a lot of detectable patterns to look for even in something
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113 seemingly so generic as ASCII. The detector would report most text
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114 files in level 1 or level 2. EUC encodings, Shift-JIS, etc. probably
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115 go to level -1 because they also pass the EOL test and all other tests
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116 for the ASCII part of the text, but have lots of high bytes, which in
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117 essence turn them into binary. Aberrant text files like something in
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118 BASE64 encoding might get placed in level 0, because they pass most
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119 tests but fail dramatically the frequency test; but they should not be
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120 reported as any lower, because that would cause explicit prompting,
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121 and the user should be able any valid text file without prompting.
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122 The escape sequences and the base-64-type checks might send 7-bit
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123 iso2022 to 0, but probably not -1, for similar reasons.
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124
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125 -- The assumed algorithm for the above detection levels is to in essence
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126 sort categories first by detection level and then by priority.
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127 Perhaps, however, we would want smarter algorithms, or at least
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128 something user-controllable -- in particular, when (other than no
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129 category at level 0 or greater) do we prompt the user to pick a
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130 category?
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131
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132 -- Improvements in how the detection algorithm works: we want to handle
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133 lots of different ways something could be encoded, including multiple
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134 stacked encodings. trying to specify a series of detection levels
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135 (check for base64 first, then check for gzip, then check for an i18n
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136 decoding, then for crlf) won't generally work. for example, what
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137 about the same encoding appearing more than once? for example, take
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138 euc-jp, base64'd, then gzip'd, then base64'd again: this could well
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139 happen, and you could specify the encodings specifically as
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140 base64|gzip|base64|euc-jp, but we'd like to autodetect it without
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141 worrying about exactly what order these things appear in. we should
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142 allow for iterating over detection/decoding cycles until we reach
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143 some maximum (we got stuck in a loop, due to incorrect category
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144 tables or detection algorithms), have no reported detection levels
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145 over -1, or we end up with no change after a decoding pass (i.e. the
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146 coding system associated with a chosen category was `no-conversion'
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147 or something equivalent). it might make sense to divide things into
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148 two phases (internal and external), where the internal phase has a
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149 separate category list and would probably mostly end up handling EOL
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150 detection; but the i think about it, the more i disagree. with
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151 properly written detectors, and properly organized tables (in
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152 general, those decodings that are more "distinctive" and thus
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153 detectable with greater certainty go lower on the list), we shouldn't
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154 need two phases. for example, let's say the example above was also
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155 in CRLF format. The EOL detector (which really detects *plain text*
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156 with a particular EOL type) would return at most level 0 for all
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157 results until the text file is reached, whereas the base64, gzip or
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158 euc-jp decoders will return higher. Once the text file is reached,
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159 the EOL detector will return 0 or higher for the CRLF encoding, and
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160 all other decoders will return 0 or lower; thus, we will successfully
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161 proceed through CRLF decoding, or at worst prompt the user. (The only
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162 external-vs-internal distinction that might make sense here is to
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163 favor coding systems of the correct source type over those that
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164 require conversion between external and internal; if done right, this
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165 could allow the CRLF detector to return level 1 for all CRLF-encoded
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166 text files, even those that look like Base-64 or similar encoding, so
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167 that CRLF encoding will always get decoded without prompting, but not
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168 interfere with other decoders. On the other hand, this
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169 external-vs-internal distinction may not matter at all -- with
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170 automatic internal-external conversion, CRLF decoding can occur
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171 before or after decoding of euc-jp, base64, iso2022, or similar,
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172 without any difference in the final results.)
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173
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174 -- There need to be two priority lists and two
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175 category->coding-system lists. Once is general, the other
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176 category->langenv-specific. The user sets the former, the langenv
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177 category->the latter. The langenv-specific entries take precedence
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178 category->over the others. This works similarly to the
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179 category->category->Unicode charset priority list.
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180
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181 -- The simple list of coding categories per detectors is not enough.
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182 Instead of coding categories, we need parameters. For example,
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183 Unicode might have separate detectors for UTF-8, UTF-7, UTF-16,
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184 and perhaps UCS-4; or UTF-16/UCS-4 would be one detection type.
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185 UTF-16 would have parameters such as "little-endian" and "needs BOM",
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186 and possibly another one like "collapse/expand/leave alone composite
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187 sequences" once we add this support. Usually these parameters
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188 correspond directly to a coding system parameter. Different
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189 likelihood values can be specified for each parameter as well as for
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190 the detection type as a whole. The user can specify particular
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191 coding systems for a particular combination of detection type and
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192 parameters, or can give "default parameters" associated with a
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193 detection type. In the latter case, we create a new coding system as
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194 necessary that corresponds to the detected type and parameters.
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195
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196 -- a better means of presentation. rather than just coming up
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197 with the new file decoded according to the detected coding
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198 system, allow the user to browse through the file and
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199 conveniently reject it if it looks wrong; then detection
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200 starts again, but with that possibility removed. in cases where
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201 certainty is low and thus more than one possibility is presented,
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202 the user can browse each one and select one or reject them all.
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203
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204 -- fail-safe: even after the user has made a choice, if they
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205 later on realize they have the wrong coding system, they can
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206 go back, and we've squirreled away the original data so they
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207 can start the process over. this may be tricky.
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208
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209 -- using a larger buffer for detection. we use just a small
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210 piece, which can give quite random results. we may need to
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211 buffer up all the data we look through because we can't
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212 necessarily rewind. the idea is we proceed until we get a
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213 result that's at least at a certain level of certainty
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214 (e.g. "probable") or we reached a maximum limit of how much
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215 we want to buffer.
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216
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217 -- dealing with interactive systems. we might need to go ahead
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218 and present the data before we've finished detection, and
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219 then re-decode it, perhaps multiple times, as we get better
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220 detection results.
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221
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222 -- Clearly some of these are more important than others. at the
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223 very least, the "better means of presentation" should be
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224 implementation as soon as possibl, along with a very simple means
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225 of fail-safe whenever the data is readibly available, e.g. it's
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226 coming from a file, which is the most common scenario.
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227
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228
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229 ------------------------------------------------------------------
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230 ABOUT FORMATS
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231 ------------------------------------------------------------------
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232
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233 when calling make-coding-system, the name can be a cons of (format1 .
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234 format2), specifying that it decodes format1->format2 and encodes the other
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235 way. if only one name is given, that is assumed to be format1, and the
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236 other is either `external' or `internal' depending on the end type.
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237 normally the user when decoding gives the decoding order in formats, but
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238 can leave off the last one, `internal', which is assumed. a multichain
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239 might look like gzip|multibyte|unicode, using the coding systems named
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240 `gzip', `(unicode . multibyte)' and `unicode'. the way this actually works
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241 is by searching for gzip->multibyte; if not found, look for gzip->external
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242 or gzip->internal. (In general we automatically do conversion between
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243 internal and external as necessary: thus gzip|crlf does the expected, and
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244 maps to gzip->external, external->internal, crlf->internal, which when
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245 fully specified would be gzip|external:external|internal:crlf|internal --
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246 see below.) To forcibly fit together two converters that have explicitly
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247 specified and incompatible names (say you have unicode->multibyte and
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248 iso8859-1->ebcdic and you know that the multibyte and iso8859-1 in this
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249 case are compatible), you can force-cast using :, like this:
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250 ebcdic|iso8859-1:multibyte|unicode. (again, if you force-cast between
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251 internal and external formats, the conversion happens automatically.)
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252
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253 --------------------------------------------------------------------------
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254 ABOUT PDUMP, UNICODE, AND RUNNING XEMACS FROM A DIRECTORY WITH WEIRD CHARS
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255 --------------------------------------------------------------------------
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256
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257 -- there's the problem that XEmacs can't be run in a directory with
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258 non-ASCII/Latin-1 chars in it, since it will be doing Unicode
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259 processing before we've had a chance to load the tables. In fact,
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260 even finding the tables in such a situation is problematic using
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261 the normal commands. my idea is to eventually load the stuff
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262 extremely extremely early, at the same time as the pdump data gets
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263 loaded. in fact, the unicode table data (stored in an efficient
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264 binary format) can even be stuck into the pdump file (which would
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265 mean as a resource to the executable, for windows). we'd need to
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266 extend pdump a bit: to allow for attaching extra data to the pdump
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267 file. (something like pdump_attach_extra_data (addr, length)
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268 returns a number of some sort, an index into the file, which you
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269 can then retrieve with pdump_load_extra_data(), which returns an
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270 addr (mmap()ed or loaded), and later you pdump_unload_extra_data()
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271 when finished. we'd probably also need
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272 pdump_attach_extra_data_append(), which appends data to the data
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273 just written out with pdump_attach_extra_data(). this way,
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274 multiple tables in memory can be written out into one contiguous
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275 table. (we'd use the tar-like trick of allowing new blocks to be
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276 written without going back to change the old blocks -- we just rely
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277 on the end of file/end of memory.) this same mechanism could be
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278 extracted out of pdump and used to handle the non-pdump situation
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279 (or alternatively, we could just dump either the memory image of
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280 the tables themselves or the compressed binary version). in the
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281 case of extra unicode tables not known about at compile time that
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282 get loaded before dumping, we either just dump them into the image
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283 (pdump and all) or extract them into the compressed binary format,
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284 free the original tables, and treat them like all other tables.
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285
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286 --------------------------------------------------------------------------
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287 HANDLING WRITING A FILE SAFELY, WITHOUT DATA LOSS
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288 --------------------------------------------------------------------------
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289
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290 -- When writing a file, we need error detection; otherwise somebody
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291 will create a Unicode file without realizing the coding system
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292 of the buffer is Raw, and then lose all the non-ASCII/Latin-1
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293 text when it's written out. We need two levels
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294
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295 1. first, a "safe-charset" level that checks before any actual
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296 encoding to see if all characters in the document can safely
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297 be represented using the given coding system. FSF has a
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298 "safe-charset" property of coding systems, but it's stupid
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299 because this information can be automatically derived from
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300 the coding system, at least the vast majority of the time.
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301 What we need is some sort of
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302 alternative-coding-system-precedence-list, langenv-specific,
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303 where everything on it can be checked for safe charsets and
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304 then the user given a list of possibilities. When the user
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305 does "save with specified encoding", they should see the same
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306 precedence list. Again like with other precedence lists,
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307 there's also a global one, and presumably all coding systems
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308 not on other list get appended to the end (and perhaps not
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309 checked at all when doing safe-checking?). safe-checking
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310 should work something like this: compile a list of all
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311 charsets used in the buffer, along with a count of chars
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312 used. that way, "slightly unsafe" charsets can perhaps be
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313 presented at the end, which will lose only a few characters
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314 and are perhaps what the users were looking for.
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315
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316 2. when actually writing out, we need error checking in case an
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317 individual char in a charset can't be written even though the
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318 charsets are safe. again, the user gets the choice of other
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319 reasonable coding systems.
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320
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321 3. same thing (error checking, list of alternatives, etc.) needs
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322 to happen when reading! all of this will be a lot of work!
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323
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324
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325 --ben
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326 */
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428
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327
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328 #include <config.h>
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329 #include "lisp.h"
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330
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331 #include "buffer.h"
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332 #include "elhash.h"
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333 #include "insdel.h"
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334 #include "lstream.h"
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440
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335 #include "opaque.h"
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771
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336 #include "file-coding.h"
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337
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338 #ifdef HAVE_ZLIB
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339 #include "zlib.h"
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428
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340 #endif
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341
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342 Lisp_Object Vkeyboard_coding_system;
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343 Lisp_Object Vterminal_coding_system;
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344 Lisp_Object Vcoding_system_for_read;
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345 Lisp_Object Vcoding_system_for_write;
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346 Lisp_Object Vfile_name_coding_system;
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347
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771
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348 #ifdef DEBUG_XEMACS
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349 Lisp_Object Vdebug_coding_detection;
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440
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350 #endif
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771
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351
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352 typedef struct coding_system_type_entry
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353 {
|
|
|
354 struct coding_system_methods *meths;
|
|
|
355 } coding_system_type_entry;
|
|
|
356
|
|
|
357 typedef struct
|
|
|
358 {
|
|
|
359 Dynarr_declare (coding_system_type_entry);
|
|
|
360 } coding_system_type_entry_dynarr;
|
|
|
361
|
|
|
362 static coding_system_type_entry_dynarr *the_coding_system_type_entry_dynarr;
|
|
|
363
|
|
|
364 static const struct lrecord_description cste_description_1[] = {
|
|
|
365 { XD_STRUCT_PTR, offsetof (coding_system_type_entry, meths), 1, &coding_system_methods_description },
|
|
|
366 { XD_END }
|
|
|
367 };
|
|
|
368
|
|
|
369 static const struct struct_description cste_description = {
|
|
|
370 sizeof (coding_system_type_entry),
|
|
|
371 cste_description_1
|
|
|
372 };
|
|
|
373
|
|
|
374 static const struct lrecord_description csted_description_1[] = {
|
|
|
375 XD_DYNARR_DESC (coding_system_type_entry_dynarr, &cste_description),
|
|
428
|
376 { XD_END }
|
|
|
377 };
|
|
|
378
|
|
771
|
379 static const struct struct_description csted_description = {
|
|
|
380 sizeof (coding_system_type_entry_dynarr),
|
|
|
381 csted_description_1
|
|
|
382 };
|
|
|
383
|
|
|
384 static Lisp_Object Vcoding_system_type_list;
|
|
|
385
|
|
|
386 /* Coding system currently associated with each coding category. */
|
|
|
387 Lisp_Object coding_category_system[MAX_DETECTOR_CATEGORIES];
|
|
|
388
|
|
|
389 /* Table of all coding categories in decreasing order of priority.
|
|
|
390 This describes a permutation of the possible coding categories. */
|
|
|
391 int coding_category_by_priority[MAX_DETECTOR_CATEGORIES];
|
|
|
392
|
|
|
393 /* Value used with to give a unique name to nameless coding systems */
|
|
|
394 int coding_system_tick;
|
|
|
395
|
|
|
396 int coding_detector_count;
|
|
|
397 int coding_detector_category_count;
|
|
|
398
|
|
|
399 detector_dynarr *all_coding_detectors;
|
|
|
400
|
|
|
401 static const struct lrecord_description struct_detector_category_description_1[]
|
|
|
402 =
|
|
|
403 {
|
|
|
404 { XD_LISP_OBJECT, offsetof (struct detector_category, sym) },
|
|
|
405 { XD_END }
|
|
|
406 };
|
|
|
407
|
|
|
408 static const struct struct_description struct_detector_category_description =
|
|
|
409 {
|
|
|
410 sizeof (struct detector_category),
|
|
|
411 struct_detector_category_description_1
|
|
428
|
412 };
|
|
|
413
|
|
771
|
414 static const struct lrecord_description detector_category_dynarr_description_1[] =
|
|
|
415 {
|
|
|
416 XD_DYNARR_DESC (detector_category_dynarr,
|
|
|
417 &struct_detector_category_description),
|
|
|
418 { XD_END }
|
|
|
419 };
|
|
|
420
|
|
|
421 static const struct struct_description detector_category_dynarr_description = {
|
|
|
422 sizeof (detector_category_dynarr),
|
|
|
423 detector_category_dynarr_description_1
|
|
|
424 };
|
|
|
425
|
|
|
426 static const struct lrecord_description struct_detector_description_1[]
|
|
|
427 =
|
|
|
428 {
|
|
|
429 { XD_STRUCT_PTR, offsetof (struct detector, cats), 1,
|
|
|
430 &detector_category_dynarr_description },
|
|
|
431 { XD_END }
|
|
|
432 };
|
|
|
433
|
|
|
434 static const struct struct_description struct_detector_description =
|
|
|
435 {
|
|
|
436 sizeof (struct detector),
|
|
|
437 struct_detector_description_1
|
|
|
438 };
|
|
|
439
|
|
|
440 static const struct lrecord_description detector_dynarr_description_1[] =
|
|
|
441 {
|
|
|
442 XD_DYNARR_DESC (detector_dynarr, &struct_detector_description),
|
|
|
443 { XD_END }
|
|
|
444 };
|
|
|
445
|
|
|
446 static const struct struct_description detector_dynarr_description = {
|
|
|
447 sizeof (detector_dynarr),
|
|
|
448 detector_dynarr_description_1
|
|
|
449 };
|
|
428
|
450
|
|
|
451 Lisp_Object Qcoding_systemp;
|
|
|
452
|
|
771
|
453 Lisp_Object Qraw_text;
|
|
428
|
454
|
|
|
455 Lisp_Object Qmnemonic, Qeol_type;
|
|
|
456 Lisp_Object Qcr, Qcrlf, Qlf;
|
|
|
457 Lisp_Object Qeol_cr, Qeol_crlf, Qeol_lf;
|
|
|
458 Lisp_Object Qpost_read_conversion;
|
|
|
459 Lisp_Object Qpre_write_conversion;
|
|
|
460
|
|
771
|
461 Lisp_Object Qtranslation_table_for_decode;
|
|
|
462 Lisp_Object Qtranslation_table_for_encode;
|
|
|
463 Lisp_Object Qsafe_chars;
|
|
|
464 Lisp_Object Qsafe_charsets;
|
|
|
465 Lisp_Object Qmime_charset;
|
|
|
466 Lisp_Object Qvalid_codes;
|
|
|
467
|
|
|
468 Lisp_Object Qno_conversion;
|
|
|
469 Lisp_Object Qconvert_eol;
|
|
440
|
470 Lisp_Object Qescape_quoted;
|
|
771
|
471 Lisp_Object Qencode, Qdecode;
|
|
|
472
|
|
|
473 Lisp_Object Qconvert_eol_lf, Qconvert_eol_cr, Qconvert_eol_crlf;
|
|
|
474 Lisp_Object Qconvert_eol_autodetect;
|
|
|
475
|
|
|
476 Lisp_Object Qnear_certainty, Qquite_probable, Qsomewhat_likely;
|
|
|
477 Lisp_Object Qas_likely_as_unlikely, Qsomewhat_unlikely, Qquite_improbable;
|
|
|
478 Lisp_Object Qnearly_impossible;
|
|
|
479
|
|
|
480 Lisp_Object Qdo_eol, Qdo_coding;
|
|
|
481
|
|
|
482 Lisp_Object Qcanonicalize_after_coding;
|
|
|
483
|
|
|
484 /* This is used to convert autodetected coding systems into existing
|
|
|
485 systems. For example, the chain undecided->convert-eol-autodetect may
|
|
|
486 have its separate parts detected as mswindows-multibyte and
|
|
|
487 convert-eol-crlf, and the result needs to be mapped to
|
|
|
488 mswindows-multibyte-dos. */
|
|
|
489 /* #### It's not clear we need this whole chain-canonicalize mechanism
|
|
|
490 any more. */
|
|
|
491 static Lisp_Object Vchain_canonicalize_hash_table;
|
|
|
492
|
|
|
493 #ifdef HAVE_ZLIB
|
|
|
494 Lisp_Object Qgzip;
|
|
428
|
495 #endif
|
|
771
|
496
|
|
|
497 /* Maps coding system names to either coding system objects or (for
|
|
|
498 aliases) other names. */
|
|
|
499 static Lisp_Object Vcoding_system_hash_table;
|
|
428
|
500
|
|
|
501 int enable_multibyte_characters;
|
|
|
502
|
|
|
503 EXFUN (Fcopy_coding_system, 2);
|
|
|
504
|
|
|
505
|
|
|
506 /************************************************************************/
|
|
771
|
507 /* Coding system object methods */
|
|
428
|
508 /************************************************************************/
|
|
|
509
|
|
|
510 static Lisp_Object
|
|
|
511 mark_coding_system (Lisp_Object obj)
|
|
|
512 {
|
|
|
513 Lisp_Coding_System *codesys = XCODING_SYSTEM (obj);
|
|
|
514
|
|
|
515 mark_object (CODING_SYSTEM_NAME (codesys));
|
|
771
|
516 mark_object (CODING_SYSTEM_DESCRIPTION (codesys));
|
|
428
|
517 mark_object (CODING_SYSTEM_MNEMONIC (codesys));
|
|
771
|
518 mark_object (CODING_SYSTEM_DOCUMENTATION (codesys));
|
|
428
|
519 mark_object (CODING_SYSTEM_EOL_LF (codesys));
|
|
|
520 mark_object (CODING_SYSTEM_EOL_CRLF (codesys));
|
|
|
521 mark_object (CODING_SYSTEM_EOL_CR (codesys));
|
|
771
|
522 mark_object (CODING_SYSTEM_SUBSIDIARY_PARENT (codesys));
|
|
|
523 mark_object (CODING_SYSTEM_CANONICAL (codesys));
|
|
|
524
|
|
|
525 MAYBE_CODESYSMETH (codesys, mark, (obj));
|
|
428
|
526
|
|
|
527 mark_object (CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys));
|
|
|
528 return CODING_SYSTEM_POST_READ_CONVERSION (codesys);
|
|
|
529 }
|
|
|
530
|
|
|
531 static void
|
|
771
|
532 print_coding_system_properties (Lisp_Object obj, Lisp_Object printcharfun)
|
|
|
533 {
|
|
|
534 Lisp_Coding_System *c = XCODING_SYSTEM (obj);
|
|
|
535 print_internal (c->methods->type, printcharfun, 1);
|
|
|
536 MAYBE_CODESYSMETH (c, print, (obj, printcharfun, 1));
|
|
|
537 if (CODING_SYSTEM_EOL_TYPE (c) != EOL_AUTODETECT)
|
|
|
538 write_fmt_string_lisp (printcharfun, " eol-type=%s",
|
|
|
539 1, Fcoding_system_property (obj, Qeol_type));
|
|
|
540 }
|
|
|
541
|
|
|
542 static void
|
|
428
|
543 print_coding_system (Lisp_Object obj, Lisp_Object printcharfun,
|
|
|
544 int escapeflag)
|
|
|
545 {
|
|
|
546 Lisp_Coding_System *c = XCODING_SYSTEM (obj);
|
|
|
547 if (print_readably)
|
|
771
|
548 printing_unreadable_object
|
|
|
549 ("printing unreadable object #<coding-system 0x%x>", c->header.uid);
|
|
|
550
|
|
|
551 write_fmt_string_lisp (printcharfun, "#<coding-system %s ", 1, c->name);
|
|
|
552 print_coding_system_properties (obj, printcharfun);
|
|
428
|
553 write_c_string (">", printcharfun);
|
|
|
554 }
|
|
|
555
|
|
771
|
556 /* Print an abbreviated version of a coding system (but still containing
|
|
|
557 all the information), for use within a coding system print method. */
|
|
|
558
|
|
|
559 static void
|
|
|
560 print_coding_system_in_print_method (Lisp_Object cs, Lisp_Object printcharfun,
|
|
|
561 int escapeflag)
|
|
|
562 {
|
|
800
|
563 write_fmt_string_lisp (printcharfun, "%s[", 1, XCODING_SYSTEM_NAME (cs));
|
|
771
|
564 print_coding_system_properties (cs, printcharfun);
|
|
|
565 write_c_string ("]", printcharfun);
|
|
|
566 }
|
|
|
567
|
|
428
|
568 static void
|
|
|
569 finalize_coding_system (void *header, int for_disksave)
|
|
|
570 {
|
|
771
|
571 Lisp_Object cs = wrap_coding_system ((Lisp_Coding_System *) header);
|
|
428
|
572 /* Since coding systems never go away, this function is not
|
|
|
573 necessary. But it would be necessary if we changed things
|
|
|
574 so that coding systems could go away. */
|
|
|
575 if (!for_disksave) /* see comment in lstream.c */
|
|
771
|
576 MAYBE_XCODESYSMETH (cs, finalize, (cs));
|
|
|
577 }
|
|
|
578
|
|
|
579 static Bytecount
|
|
|
580 sizeof_coding_system (const void *header)
|
|
|
581 {
|
|
|
582 const Lisp_Coding_System *p = (const Lisp_Coding_System *) header;
|
|
|
583 return offsetof (Lisp_Coding_System, data) + p->methods->extra_data_size;
|
|
428
|
584 }
|
|
|
585
|
|
771
|
586 static const struct lrecord_description coding_system_methods_description_1[]
|
|
|
587 = {
|
|
|
588 { XD_LISP_OBJECT,
|
|
|
589 offsetof (struct coding_system_methods, type) },
|
|
|
590 { XD_LISP_OBJECT,
|
|
|
591 offsetof (struct coding_system_methods, predicate_symbol) },
|
|
|
592 { XD_END }
|
|
|
593 };
|
|
|
594
|
|
|
595 const struct struct_description coding_system_methods_description = {
|
|
|
596 sizeof (struct coding_system_methods),
|
|
|
597 coding_system_methods_description_1
|
|
|
598 };
|
|
|
599
|
|
|
600 const struct lrecord_description coding_system_empty_extra_description[] = {
|
|
|
601 { XD_END }
|
|
|
602 };
|
|
|
603
|
|
|
604 static const struct lrecord_description coding_system_description[] =
|
|
428
|
605 {
|
|
771
|
606 { XD_STRUCT_PTR, offsetof (Lisp_Coding_System, methods), 1,
|
|
|
607 &coding_system_methods_description },
|
|
|
608 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, name) },
|
|
|
609 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, description) },
|
|
|
610 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, mnemonic) },
|
|
|
611 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, documentation) },
|
|
|
612 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, post_read_conversion) },
|
|
|
613 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, pre_write_conversion) },
|
|
|
614 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, text_file_wrapper) },
|
|
|
615 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, auto_eol_wrapper) },
|
|
|
616 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, eol[0]) },
|
|
|
617 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, eol[1]) },
|
|
|
618 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, eol[2]) },
|
|
|
619 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, subsidiary_parent) },
|
|
|
620 { XD_LISP_OBJECT, offsetof (Lisp_Coding_System, canonical) },
|
|
|
621 { XD_CODING_SYSTEM_END }
|
|
|
622 };
|
|
|
623
|
|
|
624 DEFINE_LRECORD_SEQUENCE_IMPLEMENTATION ("coding-system", coding_system,
|
|
|
625 mark_coding_system,
|
|
|
626 print_coding_system,
|
|
|
627 finalize_coding_system,
|
|
|
628 0, 0, coding_system_description,
|
|
|
629 sizeof_coding_system,
|
|
|
630 Lisp_Coding_System);
|
|
|
631
|
|
|
632
|
|
|
633 /************************************************************************/
|
|
|
634 /* Creating coding systems */
|
|
|
635 /************************************************************************/
|
|
|
636
|
|
|
637 static struct coding_system_methods *
|
|
|
638 decode_coding_system_type (Lisp_Object type, Error_Behavior errb)
|
|
428
|
639 {
|
|
771
|
640 int i;
|
|
|
641
|
|
|
642 for (i = 0; i < Dynarr_length (the_coding_system_type_entry_dynarr); i++)
|
|
428
|
643 {
|
|
771
|
644 if (EQ (type,
|
|
|
645 Dynarr_at (the_coding_system_type_entry_dynarr, i).meths->type))
|
|
|
646 return Dynarr_at (the_coding_system_type_entry_dynarr, i).meths;
|
|
428
|
647 }
|
|
771
|
648
|
|
|
649 maybe_invalid_constant ("Invalid coding system type", type,
|
|
|
650 Qcoding_system, errb);
|
|
|
651
|
|
|
652 return 0;
|
|
428
|
653 }
|
|
|
654
|
|
771
|
655 static int
|
|
|
656 valid_coding_system_type_p (Lisp_Object type)
|
|
428
|
657 {
|
|
771
|
658 return decode_coding_system_type (type, ERROR_ME_NOT) != 0;
|
|
|
659 }
|
|
|
660
|
|
|
661 DEFUN ("valid-coding-system-type-p", Fvalid_coding_system_type_p, 1, 1, 0, /*
|
|
|
662 Given a CODING-SYSTEM-TYPE, return non-nil if it is valid.
|
|
|
663 Valid types depend on how XEmacs was compiled but may include
|
|
|
664 'undecided, 'chain, 'integer, 'ccl, 'iso2022, 'big5, 'shift-jis,
|
|
|
665 'utf-16, 'ucs-4, 'utf-8, etc.
|
|
|
666 */
|
|
|
667 (coding_system_type))
|
|
|
668 {
|
|
|
669 return valid_coding_system_type_p (coding_system_type) ? Qt : Qnil;
|
|
|
670 }
|
|
|
671
|
|
|
672 DEFUN ("coding-system-type-list", Fcoding_system_type_list, 0, 0, 0, /*
|
|
|
673 Return a list of valid coding system types.
|
|
|
674 */
|
|
|
675 ())
|
|
|
676 {
|
|
|
677 return Fcopy_sequence (Vcoding_system_type_list);
|
|
|
678 }
|
|
|
679
|
|
|
680 void
|
|
|
681 add_entry_to_coding_system_type_list (struct coding_system_methods *meths)
|
|
|
682 {
|
|
|
683 struct coding_system_type_entry entry;
|
|
|
684
|
|
|
685 entry.meths = meths;
|
|
|
686 Dynarr_add (the_coding_system_type_entry_dynarr, entry);
|
|
|
687 Vcoding_system_type_list = Fcons (meths->type, Vcoding_system_type_list);
|
|
428
|
688 }
|
|
|
689
|
|
|
690 DEFUN ("coding-system-p", Fcoding_system_p, 1, 1, 0, /*
|
|
|
691 Return t if OBJECT is a coding system.
|
|
|
692 A coding system is an object that defines how text containing multiple
|
|
|
693 character sets is encoded into a stream of (typically 8-bit) bytes.
|
|
|
694 The coding system is used to decode the stream into a series of
|
|
|
695 characters (which may be from multiple charsets) when the text is read
|
|
|
696 from a file or process, and is used to encode the text back into the
|
|
|
697 same format when it is written out to a file or process.
|
|
|
698
|
|
|
699 For example, many ISO2022-compliant coding systems (such as Compound
|
|
|
700 Text, which is used for inter-client data under the X Window System)
|
|
|
701 use escape sequences to switch between different charsets -- Japanese
|
|
|
702 Kanji, for example, is invoked with "ESC $ ( B"; ASCII is invoked
|
|
|
703 with "ESC ( B"; and Cyrillic is invoked with "ESC - L". See
|
|
|
704 `make-coding-system' for more information.
|
|
|
705
|
|
|
706 Coding systems are normally identified using a symbol, and the
|
|
|
707 symbol is accepted in place of the actual coding system object whenever
|
|
|
708 a coding system is called for. (This is similar to how faces work.)
|
|
|
709 */
|
|
|
710 (object))
|
|
|
711 {
|
|
|
712 return CODING_SYSTEMP (object) ? Qt : Qnil;
|
|
|
713 }
|
|
|
714
|
|
|
715 DEFUN ("find-coding-system", Ffind_coding_system, 1, 1, 0, /*
|
|
|
716 Retrieve the coding system of the given name.
|
|
|
717
|
|
|
718 If CODING-SYSTEM-OR-NAME is a coding-system object, it is simply
|
|
|
719 returned. Otherwise, CODING-SYSTEM-OR-NAME should be a symbol.
|
|
|
720 If there is no such coding system, nil is returned. Otherwise the
|
|
|
721 associated coding system object is returned.
|
|
|
722 */
|
|
|
723 (coding_system_or_name))
|
|
|
724 {
|
|
|
725 if (NILP (coding_system_or_name))
|
|
|
726 coding_system_or_name = Qbinary;
|
|
440
|
727 else if (CODING_SYSTEMP (coding_system_or_name))
|
|
|
728 return coding_system_or_name;
|
|
428
|
729 else
|
|
|
730 CHECK_SYMBOL (coding_system_or_name);
|
|
|
731
|
|
440
|
732 while (1)
|
|
|
733 {
|
|
|
734 coding_system_or_name =
|
|
|
735 Fgethash (coding_system_or_name, Vcoding_system_hash_table, Qnil);
|
|
|
736
|
|
771
|
737 if (CODING_SYSTEMP (coding_system_or_name)
|
|
|
738 || NILP (coding_system_or_name))
|
|
440
|
739 return coding_system_or_name;
|
|
|
740 }
|
|
428
|
741 }
|
|
|
742
|
|
|
743 DEFUN ("get-coding-system", Fget_coding_system, 1, 1, 0, /*
|
|
|
744 Retrieve the coding system of the given name.
|
|
|
745 Same as `find-coding-system' except that if there is no such
|
|
|
746 coding system, an error is signaled instead of returning nil.
|
|
|
747 */
|
|
|
748 (name))
|
|
|
749 {
|
|
|
750 Lisp_Object coding_system = Ffind_coding_system (name);
|
|
|
751
|
|
|
752 if (NILP (coding_system))
|
|
563
|
753 invalid_argument ("No such coding system", name);
|
|
428
|
754 return coding_system;
|
|
|
755 }
|
|
|
756
|
|
771
|
757 int
|
|
|
758 coding_system_is_binary (Lisp_Object coding_system)
|
|
|
759 {
|
|
|
760 Lisp_Coding_System *cs = XCODING_SYSTEM (coding_system);
|
|
|
761 return
|
|
|
762 (EQ (CODING_SYSTEM_TYPE (cs), Qno_conversion) &&
|
|
|
763 CODING_SYSTEM_EOL_TYPE (cs) == EOL_LF &&
|
|
|
764 EQ (CODING_SYSTEM_POST_READ_CONVERSION (cs), Qnil) &&
|
|
|
765 EQ (CODING_SYSTEM_PRE_WRITE_CONVERSION (cs), Qnil));
|
|
|
766 }
|
|
|
767
|
|
|
768 static Lisp_Object
|
|
|
769 coding_system_real_canonical (Lisp_Object cs)
|
|
|
770 {
|
|
|
771 if (!NILP (XCODING_SYSTEM_CANONICAL (cs)))
|
|
|
772 return XCODING_SYSTEM_CANONICAL (cs);
|
|
|
773 return cs;
|
|
|
774 }
|
|
|
775
|
|
|
776 /* Return true if coding system is of the "standard" type that decodes
|
|
|
777 bytes into characters (suitable for decoding a text file). */
|
|
|
778 int
|
|
|
779 coding_system_is_for_text_file (Lisp_Object coding_system)
|
|
|
780 {
|
|
|
781 return (XCODESYSMETH_OR_GIVEN
|
|
|
782 (coding_system, conversion_end_type,
|
|
|
783 (coding_system_real_canonical (coding_system)),
|
|
|
784 DECODES_BYTE_TO_CHARACTER) ==
|
|
|
785 DECODES_BYTE_TO_CHARACTER);
|
|
|
786 }
|
|
|
787
|
|
|
788 static int
|
|
|
789 decoding_source_sink_type_is_char (Lisp_Object cs, enum source_or_sink sex)
|
|
|
790 {
|
|
|
791 enum source_sink_type type =
|
|
|
792 XCODESYSMETH_OR_GIVEN (cs, conversion_end_type,
|
|
|
793 (coding_system_real_canonical (cs)),
|
|
|
794 DECODES_BYTE_TO_CHARACTER);
|
|
|
795 if (sex == CODING_SOURCE)
|
|
|
796 return (type == DECODES_CHARACTER_TO_CHARACTER ||
|
|
|
797 type == DECODES_CHARACTER_TO_BYTE);
|
|
|
798 else
|
|
|
799 return (type == DECODES_CHARACTER_TO_CHARACTER ||
|
|
|
800 type == DECODES_BYTE_TO_CHARACTER);
|
|
|
801 }
|
|
|
802
|
|
|
803 static int
|
|
|
804 encoding_source_sink_type_is_char (Lisp_Object cs, enum source_or_sink sex)
|
|
|
805 {
|
|
|
806 return decoding_source_sink_type_is_char (cs,
|
|
|
807 /* Sex change */
|
|
|
808 sex == CODING_SOURCE ?
|
|
|
809 CODING_SINK : CODING_SOURCE);
|
|
|
810 }
|
|
|
811
|
|
|
812 /* Like Ffind_coding_system() but check that the coding system is of the
|
|
|
813 "standard" type that decodes bytes into characters (suitable for
|
|
|
814 decoding a text file), and if not, returns an appropriate wrapper that
|
|
|
815 does. Also, if EOL_WRAP is non-zero, check whether this coding system
|
|
|
816 wants EOL auto-detection, and if so, wrap with a convert-eol coding
|
|
|
817 system to do this. */
|
|
|
818
|
|
|
819 Lisp_Object
|
|
|
820 find_coding_system_for_text_file (Lisp_Object name, int eol_wrap)
|
|
|
821 {
|
|
|
822 Lisp_Object coding_system = Ffind_coding_system (name);
|
|
|
823 Lisp_Object wrapper = coding_system;
|
|
|
824
|
|
|
825 if (NILP (coding_system))
|
|
|
826 return Qnil;
|
|
|
827 if (!coding_system_is_for_text_file (coding_system))
|
|
|
828 {
|
|
|
829 wrapper = XCODING_SYSTEM_TEXT_FILE_WRAPPER (coding_system);
|
|
|
830 if (NILP (wrapper))
|
|
|
831 {
|
|
|
832 Lisp_Object chain;
|
|
|
833 if (!decoding_source_sink_type_is_char (coding_system, CODING_SINK))
|
|
|
834 chain = list2 (coding_system, Qbinary);
|
|
|
835 else
|
|
|
836 chain = list1 (coding_system);
|
|
|
837 if (decoding_source_sink_type_is_char (coding_system, CODING_SOURCE))
|
|
|
838 chain = Fcons (Qbinary, chain);
|
|
|
839 wrapper =
|
|
|
840 make_internal_coding_system
|
|
|
841 (coding_system,
|
|
|
842 "internal-text-file-wrapper",
|
|
|
843 Qchain,
|
|
|
844 Qunbound, list4 (Qchain, chain,
|
|
|
845 Qcanonicalize_after_coding, coding_system));
|
|
|
846 XCODING_SYSTEM_TEXT_FILE_WRAPPER (coding_system) = wrapper;
|
|
|
847 }
|
|
|
848 }
|
|
|
849
|
|
|
850 if (!eol_wrap || XCODING_SYSTEM_EOL_TYPE (coding_system) != EOL_AUTODETECT)
|
|
|
851 return wrapper;
|
|
|
852
|
|
|
853 coding_system = wrapper;
|
|
|
854 wrapper = XCODING_SYSTEM_AUTO_EOL_WRAPPER (coding_system);
|
|
|
855 if (!NILP (wrapper))
|
|
|
856 return wrapper;
|
|
|
857 wrapper =
|
|
|
858 make_internal_coding_system
|
|
|
859 (coding_system,
|
|
|
860 "internal-auto-eol-wrapper",
|
|
|
861 Qundecided, Qunbound,
|
|
|
862 list4 (Qcoding_system, coding_system,
|
|
|
863 Qdo_eol, Qt));
|
|
|
864 XCODING_SYSTEM_AUTO_EOL_WRAPPER (coding_system) = wrapper;
|
|
|
865 return wrapper;
|
|
|
866 }
|
|
|
867
|
|
|
868 /* Like Fget_coding_system() but verify that the coding system is of the
|
|
|
869 "standard" type that decodes bytes into characters (suitable for
|
|
|
870 decoding a text file), and if not, returns an appropriate wrapper that
|
|
|
871 does. Also, if EOL_WRAP is non-zero, check whether this coding system
|
|
|
872 wants EOL auto-detection, and if so, wrap with a convert-eol coding
|
|
|
873 system to do this. */
|
|
|
874
|
|
|
875 Lisp_Object
|
|
|
876 get_coding_system_for_text_file (Lisp_Object name, int eol_wrap)
|
|
|
877 {
|
|
|
878 Lisp_Object coding_system = find_coding_system_for_text_file (name,
|
|
|
879 eol_wrap);
|
|
|
880 if (NILP (coding_system))
|
|
|
881 invalid_argument ("No such coding system", name);
|
|
|
882 return coding_system;
|
|
|
883 }
|
|
|
884
|
|
|
885 /* We store the coding systems in hash tables with the names as the
|
|
|
886 key and the actual coding system object as the value. Occasionally
|
|
|
887 we need to use them in a list format. These routines provide us
|
|
|
888 with that. */
|
|
428
|
889 struct coding_system_list_closure
|
|
|
890 {
|
|
|
891 Lisp_Object *coding_system_list;
|
|
771
|
892 int normal;
|
|
|
893 int internal;
|
|
428
|
894 };
|
|
|
895
|
|
|
896 static int
|
|
|
897 add_coding_system_to_list_mapper (Lisp_Object key, Lisp_Object value,
|
|
|
898 void *coding_system_list_closure)
|
|
|
899 {
|
|
|
900 /* This function can GC */
|
|
|
901 struct coding_system_list_closure *cscl =
|
|
|
902 (struct coding_system_list_closure *) coding_system_list_closure;
|
|
|
903 Lisp_Object *coding_system_list = cscl->coding_system_list;
|
|
|
904
|
|
771
|
905 /* We can't just use VALUE because KEY might be an alias, and we need
|
|
|
906 the real coding system object. */
|
|
|
907 if (XCODING_SYSTEM (Ffind_coding_system (key))->internal_p ?
|
|
|
908 cscl->internal : cscl->normal)
|
|
|
909 *coding_system_list = Fcons (key, *coding_system_list);
|
|
428
|
910 return 0;
|
|
|
911 }
|
|
|
912
|
|
771
|
913 DEFUN ("coding-system-list", Fcoding_system_list, 0, 1, 0, /*
|
|
428
|
914 Return a list of the names of all defined coding systems.
|
|
771
|
915 If INTERNAL is nil, only the normal (non-internal) coding systems are
|
|
|
916 included. (Internal coding systems are created for various internal
|
|
|
917 purposes, such as implementing EOL types of CRLF and CR; generally, you do
|
|
|
918 not want to see these.) If it is t, only the internal coding systems are
|
|
|
919 included. If it is any other non-nil value both normal and internal are
|
|
|
920 included.
|
|
428
|
921 */
|
|
771
|
922 (internal))
|
|
428
|
923 {
|
|
|
924 Lisp_Object coding_system_list = Qnil;
|
|
|
925 struct gcpro gcpro1;
|
|
|
926 struct coding_system_list_closure coding_system_list_closure;
|
|
|
927
|
|
|
928 GCPRO1 (coding_system_list);
|
|
|
929 coding_system_list_closure.coding_system_list = &coding_system_list;
|
|
771
|
930 coding_system_list_closure.normal = !EQ (internal, Qt);
|
|
|
931 coding_system_list_closure.internal = !NILP (internal);
|
|
428
|
932 elisp_maphash (add_coding_system_to_list_mapper, Vcoding_system_hash_table,
|
|
|
933 &coding_system_list_closure);
|
|
|
934 UNGCPRO;
|
|
|
935
|
|
|
936 return coding_system_list;
|
|
|
937 }
|
|
|
938
|
|
|
939 DEFUN ("coding-system-name", Fcoding_system_name, 1, 1, 0, /*
|
|
|
940 Return the name of the given coding system.
|
|
|
941 */
|
|
|
942 (coding_system))
|
|
|
943 {
|
|
|
944 coding_system = Fget_coding_system (coding_system);
|
|
|
945 return XCODING_SYSTEM_NAME (coding_system);
|
|
|
946 }
|
|
|
947
|
|
|
948 static Lisp_Coding_System *
|
|
771
|
949 allocate_coding_system (struct coding_system_methods *codesys_meths,
|
|
|
950 Bytecount data_size,
|
|
|
951 Lisp_Object name)
|
|
428
|
952 {
|
|
771
|
953 Bytecount total_size = offsetof (Lisp_Coding_System, data) + data_size;
|
|
428
|
954 Lisp_Coding_System *codesys =
|
|
771
|
955 (Lisp_Coding_System *) alloc_lcrecord (total_size, &lrecord_coding_system);
|
|
|
956
|
|
|
957 zero_sized_lcrecord (codesys, total_size);
|
|
|
958 codesys->methods = codesys_meths;
|
|
428
|
959 CODING_SYSTEM_PRE_WRITE_CONVERSION (codesys) = Qnil;
|
|
|
960 CODING_SYSTEM_POST_READ_CONVERSION (codesys) = Qnil;
|
|
771
|
961 CODING_SYSTEM_EOL_TYPE (codesys) = EOL_LF;
|
|
428
|
962 CODING_SYSTEM_EOL_CRLF (codesys) = Qnil;
|
|
|
963 CODING_SYSTEM_EOL_CR (codesys) = Qnil;
|
|
|
964 CODING_SYSTEM_EOL_LF (codesys) = Qnil;
|
|
771
|
965 CODING_SYSTEM_SUBSIDIARY_PARENT (codesys) = Qnil;
|
|
|
966 CODING_SYSTEM_CANONICAL (codesys) = Qnil;
|
|
428
|
967 CODING_SYSTEM_MNEMONIC (codesys) = Qnil;
|
|
771
|
968 CODING_SYSTEM_DOCUMENTATION (codesys) = Qnil;
|
|
|
969 CODING_SYSTEM_TEXT_FILE_WRAPPER (codesys) = Qnil;
|
|
|
970 CODING_SYSTEM_AUTO_EOL_WRAPPER (codesys) = Qnil;
|
|
|
971 CODING_SYSTEM_NAME (codesys) = name;
|
|
|
972
|
|
|
973 MAYBE_CODESYSMETH (codesys, init, (wrap_coding_system (codesys)));
|
|
428
|
974
|
|
|
975 return codesys;
|
|
|
976 }
|
|
|
977
|
|
771
|
978 static enum eol_type
|
|
|
979 symbol_to_eol_type (Lisp_Object symbol)
|
|
|
980 {
|
|
|
981 CHECK_SYMBOL (symbol);
|
|
|
982 if (NILP (symbol)) return EOL_AUTODETECT;
|
|
|
983 if (EQ (symbol, Qlf)) return EOL_LF;
|
|
|
984 if (EQ (symbol, Qcrlf)) return EOL_CRLF;
|
|
|
985 if (EQ (symbol, Qcr)) return EOL_CR;
|
|
|
986
|
|
|
987 invalid_constant ("Unrecognized eol type", symbol);
|
|
801
|
988 RETURN_NOT_REACHED (EOL_AUTODETECT)
|
|
771
|
989 }
|
|
|
990
|
|
|
991 static Lisp_Object
|
|
|
992 eol_type_to_symbol (enum eol_type type)
|
|
|
993 {
|
|
|
994 switch (type)
|
|
|
995 {
|
|
|
996 default: abort ();
|
|
|
997 case EOL_LF: return Qlf;
|
|
|
998 case EOL_CRLF: return Qcrlf;
|
|
|
999 case EOL_CR: return Qcr;
|
|
|
1000 case EOL_AUTODETECT: return Qnil;
|
|
|
1001 }
|
|
|
1002 }
|
|
|
1003
|
|
|
1004 struct subsidiary_type
|
|
|
1005 {
|
|
|
1006 Char_ASCII *extension;
|
|
|
1007 Char_ASCII *mnemonic_ext;
|
|
|
1008 enum eol_type eol;
|
|
|
1009 };
|
|
|
1010
|
|
|
1011 static struct subsidiary_type coding_subsidiary_list[] =
|
|
|
1012 { { "-unix", "", EOL_LF },
|
|
|
1013 { "-dos", ":T", EOL_CRLF },
|
|
|
1014 { "-mac", ":t", EOL_CR } };
|
|
|
1015
|
|
|
1016 /* kludge */
|
|
428
|
1017 static void
|
|
771
|
1018 setup_eol_coding_systems (Lisp_Object codesys)
|
|
428
|
1019 {
|
|
793
|
1020 int len = XSTRING_LENGTH (XSYMBOL (XCODING_SYSTEM_NAME (codesys))->name);
|
|
771
|
1021 Intbyte *codesys_name = (Intbyte *) alloca (len + 7);
|
|
|
1022 int mlen = -1;
|
|
|
1023 Intbyte *codesys_mnemonic = 0;
|
|
|
1024 Lisp_Object codesys_name_sym, sub_codesys;
|
|
|
1025 int i;
|
|
|
1026
|
|
|
1027 memcpy (codesys_name,
|
|
793
|
1028 XSTRING_DATA (XSYMBOL (XCODING_SYSTEM_NAME (codesys))->name), len);
|
|
771
|
1029
|
|
|
1030 if (STRINGP (XCODING_SYSTEM_MNEMONIC (codesys)))
|
|
428
|
1031 {
|
|
771
|
1032 mlen = XSTRING_LENGTH (XCODING_SYSTEM_MNEMONIC (codesys));
|
|
|
1033 codesys_mnemonic = (Intbyte *) alloca (mlen + 7);
|
|
|
1034 memcpy (codesys_mnemonic,
|
|
|
1035 XSTRING_DATA (XCODING_SYSTEM_MNEMONIC (codesys)), mlen);
|
|
|
1036 }
|
|
|
1037
|
|
|
1038 /* Create three "subsidiary" coding systems, decoding data encoded using
|
|
|
1039 each of the three EOL types. We do this for each subsidiary by
|
|
|
1040 copying the original coding system, setting the EOL type
|
|
|
1041 appropriately, and setting the CANONICAL member of the new coding
|
|
|
1042 system to be a chain consisting of the original coding system followed
|
|
|
1043 by a convert-eol coding system to do the EOL decoding. For EOL type
|
|
|
1044 LF, however, we don't need any decoding, so we skip creating a
|
|
|
1045 CANONICAL.
|
|
|
1046
|
|
|
1047 If the original coding system is not a text-type coding system
|
|
|
1048 (decodes byte->char), we need to coerce it to one by the appropriate
|
|
|
1049 wrapping in CANONICAL. */
|
|
|
1050
|
|
|
1051 for (i = 0; i < countof (coding_subsidiary_list); i++)
|
|
|
1052 {
|
|
|
1053 Char_ASCII *extension = coding_subsidiary_list[i].extension;
|
|
|
1054 Char_ASCII *mnemonic_ext = coding_subsidiary_list[i].mnemonic_ext;
|
|
|
1055 enum eol_type eol = coding_subsidiary_list[i].eol;
|
|
|
1056
|
|
|
1057 qxestrcpy_c (codesys_name + len, extension);
|
|
|
1058 codesys_name_sym = intern_int (codesys_name);
|
|
|
1059 if (mlen != -1)
|
|
|
1060 qxestrcpy_c (codesys_mnemonic + mlen, mnemonic_ext);
|
|
|
1061
|
|
|
1062 sub_codesys = Fcopy_coding_system (codesys, codesys_name_sym);
|
|
|
1063 if (mlen != -1)
|
|
|
1064 XCODING_SYSTEM_MNEMONIC (sub_codesys) =
|
|
|
1065 build_intstring (codesys_mnemonic);
|
|
|
1066
|
|
|
1067 if (eol != EOL_LF)
|
|
|
1068 {
|
|
|
1069 Lisp_Object chain = list2 (get_coding_system_for_text_file
|
|
|
1070 (codesys, 0),
|
|
|
1071 eol == EOL_CR ? Qconvert_eol_cr :
|
|
|
1072 Qconvert_eol_crlf);
|
|
|
1073 Lisp_Object canon =
|
|
|
1074 make_internal_coding_system
|
|
|
1075 (sub_codesys, "internal-subsidiary-eol-wrapper",
|
|
|
1076 Qchain, Qunbound,
|
|
|
1077 mlen != -1 ?
|
|
|
1078 list6 (Qmnemonic, build_intstring (codesys_mnemonic),
|
|
|
1079 Qchain, chain,
|
|
|
1080 Qcanonicalize_after_coding, sub_codesys) :
|
|
|
1081 list4 (Qchain, chain,
|
|
|
1082 Qcanonicalize_after_coding, sub_codesys));
|
|
|
1083 XCODING_SYSTEM_CANONICAL (sub_codesys) = canon;
|
|
|
1084 }
|
|
|
1085 XCODING_SYSTEM_EOL_TYPE (sub_codesys) = eol;
|
|
|
1086 XCODING_SYSTEM_SUBSIDIARY_PARENT (sub_codesys) = codesys;
|
|
|
1087 XCODING_SYSTEM (codesys)->eol[eol] = sub_codesys;
|
|
428
|
1088 }
|
|
|
1089 }
|
|
|
1090
|
|
771
|
1091 /* Basic function to create new coding systems. For `make-coding-system',
|
|
|
1092 NAME-OR-EXISTING is the NAME argument, PREFIX is null, and TYPE,
|
|
|
1093 DESCRIPTION, and PROPS are the same. All created coding systems are put
|
|
|
1094 in a hash table indexed by NAME.
|
|
|
1095
|
|
|
1096 If PREFIX is a string, NAME-OR-EXISTING should specify an existing
|
|
|
1097 coding system (or nil), and an internal coding system will be created.
|
|
|
1098 The name of the coding system will be constructed by combining PREFIX
|
|
|
1099 with the name of the existing coding system (if given), and a number
|
|
|
1100 will be appended to insure uniqueness. In such a case, if Qunbound is
|
|
|
1101 given for DESCRIPTION, the description gets created based on the
|
|
|
1102 generated name. Also, if no mnemonic is given in the properties list, a
|
|
|
1103 mnemonic is created based on the generated name.
|
|
|
1104
|
|
|
1105 For internal coding systems, the coding system is marked as internal
|
|
|
1106 (see `coding-system-list'), and no subsidiaries will be created or
|
|
|
1107 eol-wrapping will happen. Otherwise:
|
|
|
1108
|
|
|
1109 -- if the eol-type property is `lf' or t, the coding system is merely
|
|
|
1110 created and returned. (For t, the coding system will be wrapped with
|
|
|
1111 an EOL autodetector when it's used to read a file.)
|
|
|
1112
|
|
|
1113 -- if eol-type is `crlf' or `cr', after the coding system object is
|
|
|
1114 created, it will be wrapped in a chain with the appropriate
|
|
|
1115 convert-eol coding system (either `convert-eol-crlf' or
|
|
|
1116 `convert-eol-cr'), so that CRLF->LF or CR->LF conversion is done at
|
|
|
1117 decoding time, and the opposite at encoding time. The resulting
|
|
|
1118 chain becomes the CANONICAL field of the coding system object.
|
|
|
1119
|
|
|
1120 -- if eol-type is nil or omitted, "subsidiaries" are generated: Three
|
|
|
1121 coding systems where the original coding system (before wrapping with
|
|
|
1122 convert-eol-autodetect) is either unwrapped or wrapped with
|
|
|
1123 convert-eol-crlf or convert-eol-cr, respectively, so that coding systems
|
|
|
1124 to handle LF, CRLF, and CR end-of-line indicators are created. (This
|
|
|
1125 crazy crap is based on existing behavior in other Mule versions,
|
|
|
1126 including FSF Emacs.)
|
|
|
1127 */
|
|
428
|
1128
|
|
|
1129 static Lisp_Object
|
|
771
|
1130 make_coding_system_1 (Lisp_Object name_or_existing, Char_ASCII *prefix,
|
|
|
1131 Lisp_Object type, Lisp_Object description,
|
|
|
1132 Lisp_Object props)
|
|
428
|
1133 {
|
|
771
|
1134 Lisp_Coding_System *cs;
|
|
|
1135 int need_to_setup_eol_systems = 1;
|
|
|
1136 enum eol_type eol_wrapper = EOL_AUTODETECT;
|
|
|
1137 struct coding_system_methods *meths;
|
|
|
1138 Lisp_Object csobj;
|
|
|
1139 Lisp_Object defmnem = Qnil;
|
|
|
1140
|
|
|
1141 if (NILP (type))
|
|
|
1142 type = Qundecided;
|
|
|
1143 meths = decode_coding_system_type (type, ERROR_ME);
|
|
|
1144
|
|
|
1145 if (prefix)
|
|
428
|
1146 {
|
|
771
|
1147 Intbyte *newname =
|
|
|
1148 emacs_sprintf_malloc (NULL, "%s-%s-%d",
|
|
|
1149 prefix,
|
|
|
1150 NILP (name_or_existing) ? (Intbyte *) "nil" :
|
|
|
1151 XSTRING_DATA (Fsymbol_name (XCODING_SYSTEM_NAME
|
|
|
1152 (name_or_existing))),
|
|
|
1153 ++coding_system_tick);
|
|
|
1154 name_or_existing = intern_int (newname);
|
|
|
1155 xfree (newname);
|
|
|
1156
|
|
|
1157 if (UNBOUNDP (description))
|
|
|
1158 {
|
|
|
1159 newname =
|
|
|
1160 emacs_sprintf_malloc
|
|
|
1161 (NULL, "For Internal Use (%s)",
|
|
|
1162 XSTRING_DATA (Fsymbol_name (name_or_existing)));
|
|
|
1163 description = build_intstring (newname);
|
|
|
1164 xfree (newname);
|
|
|
1165 }
|
|
|
1166
|
|
|
1167 newname = emacs_sprintf_malloc (NULL, "Int%d", coding_system_tick);
|
|
|
1168 defmnem = build_intstring (newname);
|
|
428
|
1169 }
|
|
771
|
1170 else
|
|
|
1171 CHECK_SYMBOL (name_or_existing);
|
|
|
1172
|
|
|
1173 if (!NILP (Ffind_coding_system (name_or_existing)))
|
|
|
1174 invalid_operation ("Cannot redefine existing coding system",
|
|
|
1175 name_or_existing);
|
|
|
1176
|
|
|
1177 cs = allocate_coding_system (meths, meths->extra_data_size,
|
|
|
1178 name_or_existing);
|
|
793
|
1179 csobj = wrap_coding_system (cs);
|
|
771
|
1180
|
|
|
1181 cs->internal_p = !!prefix;
|
|
|
1182
|
|
|
1183 if (NILP (description))
|
|
|
1184 description = build_string ("");
|
|
|
1185 else
|
|
|
1186 CHECK_STRING (description);
|
|
|
1187 CODING_SYSTEM_DESCRIPTION (cs) = description;
|
|
|
1188
|
|
|
1189 if (!NILP (defmnem))
|
|
|
1190 CODING_SYSTEM_MNEMONIC (cs) = defmnem;
|
|
|
1191
|
|
|
1192 {
|
|
|
1193 EXTERNAL_PROPERTY_LIST_LOOP_3 (key, value, props)
|
|
|
1194 {
|
|
|
1195 int recognized = 1;
|
|
|
1196
|
|
|
1197 if (EQ (key, Qmnemonic))
|
|
|
1198 {
|
|
|
1199 if (!NILP (value))
|
|
|
1200 CHECK_STRING (value);
|
|
|
1201 CODING_SYSTEM_MNEMONIC (cs) = value;
|
|
|
1202 }
|
|
|
1203
|
|
|
1204 else if (EQ (key, Qdocumentation))
|
|
|
1205 {
|
|
|
1206 if (!NILP (value))
|
|
|
1207 CHECK_STRING (value);
|
|
|
1208 CODING_SYSTEM_DOCUMENTATION (cs) = value;
|
|
|
1209 }
|
|
|
1210
|
|
|
1211 else if (EQ (key, Qeol_type))
|
|
|
1212 {
|
|
|
1213 need_to_setup_eol_systems = NILP (value);
|
|
|
1214 if (EQ (value, Qt))
|
|
|
1215 value = Qnil;
|
|
|
1216 eol_wrapper = symbol_to_eol_type (value);
|
|
|
1217 }
|
|
|
1218
|
|
|
1219 else if (EQ (key, Qpost_read_conversion))
|
|
|
1220 CODING_SYSTEM_POST_READ_CONVERSION (cs) = value;
|
|
|
1221 else if (EQ (key, Qpre_write_conversion))
|
|
|
1222 CODING_SYSTEM_PRE_WRITE_CONVERSION (cs) = value;
|
|
|
1223 /* FSF compatibility */
|
|
|
1224 else if (EQ (key, Qtranslation_table_for_decode))
|
|
|
1225 ;
|
|
|
1226 else if (EQ (key, Qtranslation_table_for_encode))
|
|
|
1227 ;
|
|
|
1228 else if (EQ (key, Qsafe_chars))
|
|
|
1229 ;
|
|
|
1230 else if (EQ (key, Qsafe_charsets))
|
|
|
1231 ;
|
|
|
1232 else if (EQ (key, Qmime_charset))
|
|
|
1233 ;
|
|
|
1234 else if (EQ (key, Qvalid_codes))
|
|
|
1235 ;
|
|
|
1236 else
|
|
|
1237 recognized = CODESYSMETH_OR_GIVEN (cs, putprop,
|
|
|
1238 (csobj, key, value), 0);
|
|
|
1239
|
|
|
1240 if (!recognized)
|
|
|
1241 invalid_constant ("Unrecognized property", key);
|
|
|
1242 }
|
|
|
1243 }
|
|
|
1244
|
|
|
1245 {
|
|
|
1246 XCODING_SYSTEM_CANONICAL (csobj) =
|
|
|
1247 CODESYSMETH_OR_GIVEN (cs, canonicalize, (csobj), Qnil);
|
|
|
1248 XCODING_SYSTEM_EOL_TYPE (csobj) = EOL_AUTODETECT; /* for copy-coding-system
|
|
|
1249 below */
|
|
|
1250
|
|
|
1251 if (need_to_setup_eol_systems && !cs->internal_p)
|
|
|
1252 setup_eol_coding_systems (csobj);
|
|
|
1253 else if (eol_wrapper == EOL_CR || eol_wrapper == EOL_CRLF)
|
|
|
1254 {
|
|
|
1255 /* If a specific eol-type (other than LF) was specified, we handle
|
|
|
1256 this by converting the coding system into a chain that wraps the
|
|
|
1257 coding system along with a convert-eol system after it, in
|
|
|
1258 exactly that same switcheroo fashion that the normal
|
|
|
1259 canonicalize method works -- BUT we will run into a problem if
|
|
|
1260 we do it the obvious way, because when `chain' creates its
|
|
|
1261 substreams, the substream containing the coding system we're
|
|
|
1262 creating will have canonicalization expansion done on it,
|
|
|
1263 leading to infinite recursion. So we have to generate a new,
|
|
|
1264 internal coding system with the previous value of CANONICAL. */
|
|
|
1265 Intbyte *newname =
|
|
|
1266 emacs_sprintf_malloc
|
|
|
1267 (NULL, "internal-eol-copy-%s-%d",
|
|
|
1268 XSTRING_DATA (Fsymbol_name (name_or_existing)),
|
|
|
1269 ++coding_system_tick);
|
|
|
1270 Lisp_Object newnamesym = intern_int (newname);
|
|
|
1271 Lisp_Object copied = Fcopy_coding_system (csobj, newnamesym);
|
|
|
1272 xfree (newname);
|
|
|
1273
|
|
|
1274 XCODING_SYSTEM_CANONICAL (csobj) =
|
|
|
1275 make_internal_coding_system
|
|
|
1276 (csobj,
|
|
|
1277 "internal-eol-wrapper",
|
|
|
1278 Qchain, Qunbound,
|
|
|
1279 list4 (Qchain,
|
|
|
1280 list2 (copied,
|
|
|
1281 eol_wrapper == EOL_CR ?
|
|
|
1282 Qconvert_eol_cr :
|
|
|
1283 Qconvert_eol_crlf),
|
|
|
1284 Qcanonicalize_after_coding,
|
|
|
1285 csobj));
|
|
|
1286 }
|
|
|
1287 XCODING_SYSTEM_EOL_TYPE (csobj) = eol_wrapper;
|
|
|
1288 }
|
|
|
1289
|
|
|
1290 Fputhash (name_or_existing, csobj, Vcoding_system_hash_table);
|
|
|
1291
|
|
|
1292 return csobj;
|
|
428
|
1293 }
|
|
|
1294
|
|
771
|
1295 Lisp_Object
|
|
|
1296 make_internal_coding_system (Lisp_Object existing, Char_ASCII *prefix,
|
|
|
1297 Lisp_Object type, Lisp_Object description,
|
|
|
1298 Lisp_Object props)
|
|
|
1299 {
|
|
|
1300 return make_coding_system_1 (existing, prefix, type, description, props);
|
|
|
1301 }
|
|
428
|
1302
|
|
|
1303 DEFUN ("make-coding-system", Fmake_coding_system, 2, 4, 0, /*
|
|
|
1304 Register symbol NAME as a coding system.
|
|
|
1305
|
|
|
1306 TYPE describes the conversion method used and should be one of
|
|
|
1307
|
|
|
1308 nil or 'undecided
|
|
|
1309 Automatic conversion. XEmacs attempts to detect the coding system
|
|
|
1310 used in the file.
|
|
771
|
1311 'chain
|
|
|
1312 Chain two or more coding systems together to make a combination coding
|
|
|
1313 system.
|
|
428
|
1314 'no-conversion
|
|
|
1315 No conversion. Use this for binary files and such. On output,
|
|
|
1316 graphic characters that are not in ASCII or Latin-1 will be
|
|
|
1317 replaced by a ?. (For a no-conversion-encoded buffer, these
|
|
|
1318 characters will only be present if you explicitly insert them.)
|
|
771
|
1319 'convert-eol
|
|
|
1320 Convert CRLF sequences or CR to LF.
|
|
428
|
1321 'shift-jis
|
|
|
1322 Shift-JIS (a Japanese encoding commonly used in PC operating systems).
|
|
771
|
1323 'unicode
|
|
|
1324 Any Unicode encoding (UCS-4, UTF-8, UTF-16, etc.).
|
|
|
1325 'mswindows-unicode-to-multibyte
|
|
|
1326 (MS Windows only) Converts from Windows Unicode to Windows Multibyte
|
|
|
1327 (any code page encoding) upon encoding, and the other way upon decoding.
|
|
|
1328 'mswindows-multibyte
|
|
|
1329 Converts to or from Windows Multibyte (any code page encoding).
|
|
|
1330 This is resolved into a chain of `mswindows-unicode' and
|
|
|
1331 `mswindows-unicode-to-multibyte'.
|
|
428
|
1332 'iso2022
|
|
|
1333 Any ISO2022-compliant encoding. Among other things, this includes
|
|
|
1334 JIS (the Japanese encoding commonly used for e-mail), EUC (the
|
|
|
1335 standard Unix encoding for Japanese and other languages), and
|
|
|
1336 Compound Text (the encoding used in X11). You can specify more
|
|
442
|
1337 specific information about the conversion with the PROPS argument.
|
|
428
|
1338 'big5
|
|
|
1339 Big5 (the encoding commonly used for Taiwanese).
|
|
|
1340 'ccl
|
|
|
1341 The conversion is performed using a user-written pseudo-code
|
|
|
1342 program. CCL (Code Conversion Language) is the name of this
|
|
|
1343 pseudo-code.
|
|
771
|
1344 'gzip
|
|
|
1345 GZIP compression format.
|
|
428
|
1346 'internal
|
|
|
1347 Write out or read in the raw contents of the memory representing
|
|
|
1348 the buffer's text. This is primarily useful for debugging
|
|
|
1349 purposes, and is only enabled when XEmacs has been compiled with
|
|
|
1350 DEBUG_XEMACS defined (via the --debug configure option).
|
|
|
1351 WARNING: Reading in a file using 'internal conversion can result
|
|
|
1352 in an internal inconsistency in the memory representing a
|
|
|
1353 buffer's text, which will produce unpredictable results and may
|
|
|
1354 cause XEmacs to crash. Under normal circumstances you should
|
|
|
1355 never use 'internal conversion.
|
|
|
1356
|
|
771
|
1357 DESCRIPTION is a short English phrase describing the coding system,
|
|
|
1358 suitable for use as a menu item. (See also the `documentation' property
|
|
|
1359 below.)
|
|
428
|
1360
|
|
|
1361 PROPS is a property list, describing the specific nature of the
|
|
|
1362 character set. Recognized properties are:
|
|
|
1363
|
|
|
1364 'mnemonic
|
|
|
1365 String to be displayed in the modeline when this coding system is
|
|
|
1366 active.
|
|
|
1367
|
|
771
|
1368 'documentation
|
|
|
1369 Detailed documentation on the coding system.
|
|
|
1370
|
|
428
|
1371 'eol-type
|
|
|
1372 End-of-line conversion to be used. It should be one of
|
|
|
1373
|
|
|
1374 nil
|
|
|
1375 Automatically detect the end-of-line type (LF, CRLF,
|
|
|
1376 or CR). Also generate subsidiary coding systems named
|
|
|
1377 `NAME-unix', `NAME-dos', and `NAME-mac', that are
|
|
|
1378 identical to this coding system but have an EOL-TYPE
|
|
|
1379 value of 'lf, 'crlf, and 'cr, respectively.
|
|
|
1380 'lf
|
|
|
1381 The end of a line is marked externally using ASCII LF.
|
|
|
1382 Since this is also the way that XEmacs represents an
|
|
|
1383 end-of-line internally, specifying this option results
|
|
|
1384 in no end-of-line conversion. This is the standard
|
|
|
1385 format for Unix text files.
|
|
|
1386 'crlf
|
|
|
1387 The end of a line is marked externally using ASCII
|
|
|
1388 CRLF. This is the standard format for MS-DOS text
|
|
|
1389 files.
|
|
|
1390 'cr
|
|
|
1391 The end of a line is marked externally using ASCII CR.
|
|
|
1392 This is the standard format for Macintosh text files.
|
|
|
1393 t
|
|
|
1394 Automatically detect the end-of-line type but do not
|
|
|
1395 generate subsidiary coding systems. (This value is
|
|
|
1396 converted to nil when stored internally, and
|
|
|
1397 `coding-system-property' will return nil.)
|
|
|
1398
|
|
|
1399 'post-read-conversion
|
|
771
|
1400 The value is a function to call after some text is inserted and
|
|
|
1401 decoded by the coding system itself and before any functions in
|
|
|
1402 `after-change-functions' are called. (#### Not actually true in
|
|
|
1403 XEmacs. `after-change-functions' will be called twice if
|
|
|
1404 `post-read-conversion' changes something.) The argument of this
|
|
|
1405 function is the same as for a function in
|
|
|
1406 `after-insert-file-functions', i.e. LENGTH of the text inserted,
|
|
|
1407 with point at the head of the text to be decoded.
|
|
428
|
1408
|
|
|
1409 'pre-write-conversion
|
|
771
|
1410 The value is a function to call after all functions in
|
|
|
1411 `write-region-annotate-functions' and `buffer-file-format' are
|
|
|
1412 called, and before the text is encoded by the coding system itself.
|
|
|
1413 The arguments to this function are the same as those of a function
|
|
|
1414 in `write-region-annotate-functions', i.e. FROM and TO, specifying
|
|
|
1415 a region of text.
|
|
|
1416
|
|
|
1417
|
|
|
1418
|
|
|
1419 The following properties are allowed for FSF compatibility but currently
|
|
|
1420 ignored:
|
|
|
1421
|
|
|
1422 'translation-table-for-decode
|
|
|
1423 The value is a translation table to be applied on decoding. See
|
|
|
1424 the function `make-translation-table' for the format of translation
|
|
|
1425 table. This is not applicable to CCL-based coding systems.
|
|
|
1426
|
|
|
1427 'translation-table-for-encode
|
|
|
1428 The value is a translation table to be applied on encoding. This is
|
|
|
1429 not applicable to CCL-based coding systems.
|
|
|
1430
|
|
|
1431 'safe-chars
|
|
|
1432 The value is a char table. If a character has non-nil value in it,
|
|
|
1433 the character is safely supported by the coding system. This
|
|
|
1434 overrides the specification of safe-charsets.
|
|
|
1435
|
|
|
1436 'safe-charsets
|
|
|
1437 The value is a list of charsets safely supported by the coding
|
|
|
1438 system. The value t means that all charsets Emacs handles are
|
|
|
1439 supported. Even if some charset is not in this list, it doesn't
|
|
|
1440 mean that the charset can't be encoded in the coding system;
|
|
|
1441 it just means that some other receiver of text encoded
|
|
|
1442 in the coding system won't be able to handle that charset.
|
|
|
1443
|
|
|
1444 'mime-charset
|
|
|
1445 The value is a symbol of which name is `MIME-charset' parameter of
|
|
|
1446 the coding system.
|
|
|
1447
|
|
|
1448 'valid-codes (meaningful only for a coding system based on CCL)
|
|
|
1449 The value is a list to indicate valid byte ranges of the encoded
|
|
|
1450 file. Each element of the list is an integer or a cons of integer.
|
|
|
1451 In the former case, the integer value is a valid byte code. In the
|
|
|
1452 latter case, the integers specifies the range of valid byte codes.
|
|
|
1453
|
|
|
1454
|
|
|
1455
|
|
|
1456 The following additional property is recognized if TYPE is 'convert-eol:
|
|
|
1457
|
|
|
1458 'subtype
|
|
793
|
1459 One of `lf', `crlf', `cr' or nil (for autodetection). When decoding,
|
|
|
1460 the corresponding sequence will be converted to LF. When encoding,
|
|
|
1461 the opposite happens. This coding system converts characters to
|
|
771
|
1462 characters.
|
|
|
1463
|
|
428
|
1464
|
|
|
1465
|
|
|
1466 The following additional properties are recognized if TYPE is 'iso2022:
|
|
|
1467
|
|
|
1468 'charset-g0
|
|
|
1469 'charset-g1
|
|
|
1470 'charset-g2
|
|
|
1471 'charset-g3
|
|
|
1472 The character set initially designated to the G0 - G3 registers.
|
|
|
1473 The value should be one of
|
|
|
1474
|
|
|
1475 -- A charset object (designate that character set)
|
|
|
1476 -- nil (do not ever use this register)
|
|
|
1477 -- t (no character set is initially designated to
|
|
|
1478 the register, but may be later on; this automatically
|
|
|
1479 sets the corresponding `force-g*-on-output' property)
|
|
|
1480
|
|
|
1481 'force-g0-on-output
|
|
|
1482 'force-g1-on-output
|
|
|
1483 'force-g2-on-output
|
|
|
1484 'force-g2-on-output
|
|
|
1485 If non-nil, send an explicit designation sequence on output before
|
|
|
1486 using the specified register.
|
|
|
1487
|
|
|
1488 'short
|
|
|
1489 If non-nil, use the short forms "ESC $ @", "ESC $ A", and
|
|
|
1490 "ESC $ B" on output in place of the full designation sequences
|
|
|
1491 "ESC $ ( @", "ESC $ ( A", and "ESC $ ( B".
|
|
|
1492
|
|
|
1493 'no-ascii-eol
|
|
|
1494 If non-nil, don't designate ASCII to G0 at each end of line on output.
|
|
|
1495 Setting this to non-nil also suppresses other state-resetting that
|
|
|
1496 normally happens at the end of a line.
|
|
|
1497
|
|
|
1498 'no-ascii-cntl
|
|
|
1499 If non-nil, don't designate ASCII to G0 before control chars on output.
|
|
|
1500
|
|
|
1501 'seven
|
|
|
1502 If non-nil, use 7-bit environment on output. Otherwise, use 8-bit
|
|
|
1503 environment.
|
|
|
1504
|
|
|
1505 'lock-shift
|
|
|
1506 If non-nil, use locking-shift (SO/SI) instead of single-shift
|
|
|
1507 or designation by escape sequence.
|
|
|
1508
|
|
|
1509 'no-iso6429
|
|
|
1510 If non-nil, don't use ISO6429's direction specification.
|
|
|
1511
|
|
|
1512 'escape-quoted
|
|
|
1513 If non-nil, literal control characters that are the same as
|
|
|
1514 the beginning of a recognized ISO2022 or ISO6429 escape sequence
|
|
|
1515 (in particular, ESC (0x1B), SO (0x0E), SI (0x0F), SS2 (0x8E),
|
|
|
1516 SS3 (0x8F), and CSI (0x9B)) are "quoted" with an escape character
|
|
|
1517 so that they can be properly distinguished from an escape sequence.
|
|
|
1518 (Note that doing this results in a non-portable encoding.) This
|
|
|
1519 encoding flag is used for byte-compiled files. Note that ESC
|
|
|
1520 is a good choice for a quoting character because there are no
|
|
|
1521 escape sequences whose second byte is a character from the Control-0
|
|
|
1522 or Control-1 character sets; this is explicitly disallowed by the
|
|
|
1523 ISO2022 standard.
|
|
|
1524
|
|
|
1525 'input-charset-conversion
|
|
|
1526 A list of conversion specifications, specifying conversion of
|
|
|
1527 characters in one charset to another when decoding is performed.
|
|
|
1528 Each specification is a list of two elements: the source charset,
|
|
|
1529 and the destination charset.
|
|
|
1530
|
|
|
1531 'output-charset-conversion
|
|
|
1532 A list of conversion specifications, specifying conversion of
|
|
|
1533 characters in one charset to another when encoding is performed.
|
|
|
1534 The form of each specification is the same as for
|
|
|
1535 'input-charset-conversion.
|
|
|
1536
|
|
|
1537
|
|
771
|
1538
|
|
428
|
1539 The following additional properties are recognized (and required)
|
|
|
1540 if TYPE is 'ccl:
|
|
|
1541
|
|
|
1542 'decode
|
|
|
1543 CCL program used for decoding (converting to internal format).
|
|
|
1544
|
|
|
1545 'encode
|
|
|
1546 CCL program used for encoding (converting to external format).
|
|
771
|
1547
|
|
|
1548
|
|
|
1549 The following additional properties are recognized if TYPE is 'chain:
|
|
|
1550
|
|
|
1551 'chain
|
|
|
1552 List of coding systems to be chained together, in decoding order.
|
|
|
1553
|
|
|
1554 'canonicalize-after-coding
|
|
|
1555 Coding system to be returned by the detector routines in place of
|
|
|
1556 this coding system.
|
|
|
1557
|
|
|
1558
|
|
|
1559
|
|
|
1560 The following additional properties are recognized if TYPE is 'unicode:
|
|
|
1561
|
|
|
1562 'type
|
|
|
1563 One of `utf-16', `utf-8', `ucs-4', or `utf-7' (the latter is not
|
|
|
1564 yet implemented). `utf-16' is the basic two-byte encoding;
|
|
|
1565 `ucs-4' is the four-byte encoding; `utf-8' is an ASCII-compatible
|
|
|
1566 variable-width 8-bit encoding; `utf-7' is a 7-bit encoding using
|
|
|
1567 only characters that will safely pass through all mail gateways.
|
|
|
1568
|
|
|
1569 'little-endian
|
|
|
1570 If non-nil, `utf-16' and `ucs-4' will write out the groups of two
|
|
|
1571 or four bytes little-endian instead of big-endian. This is required,
|
|
|
1572 for example, under Windows.
|
|
|
1573
|
|
|
1574 'need-bom
|
|
|
1575 If non-nil, a byte order mark (BOM, or Unicode FFFE) should be
|
|
|
1576 written out at the beginning of the data. This serves both to
|
|
|
1577 identify the endianness of the following data and to mark the
|
|
|
1578 data as Unicode (at least, this is how Windows uses it).
|
|
|
1579
|
|
|
1580
|
|
|
1581
|
|
|
1582 The following additional properties are recognized if TYPE is
|
|
|
1583 'mswindows-multibyte:
|
|
|
1584
|
|
|
1585 'code-page
|
|
|
1586 Either a number (specifying a particular code page) or one of the
|
|
|
1587 symbols `ansi', `oem', `mac', or `ebcdic', specifying the ANSI,
|
|
|
1588 OEM, Macintosh, or EBCDIC code page associated with a particular
|
|
|
1589 locale (given by the `locale' property). NOTE: EBCDIC code pages
|
|
|
1590 only exist in Windows 2000 and later.
|
|
|
1591
|
|
|
1592 'locale
|
|
|
1593 If `code-page' is a symbol, this specifies the locale whose code
|
|
|
1594 page of the corresponding type should be used. This should be
|
|
|
1595 one of the following: A cons of two strings, (LANGUAGE
|
|
|
1596 . SUBLANGUAGE) (see `mswindows-set-current-locale'); a string (a
|
|
|
1597 language; SUBLANG_DEFAULT, i.e. the default sublanguage, is
|
|
|
1598 used); or one of the symbols `current', `user-default', or
|
|
|
1599 `system-default', corresponding to the values of
|
|
|
1600 `mswindows-current-locale', `mswindows-user-default-locale', or
|
|
|
1601 `mswindows-system-default-locale', respectively.
|
|
|
1602
|
|
|
1603
|
|
|
1604
|
|
|
1605 The following additional properties are recognized if TYPE is 'undecided:
|
|
|
1606
|
|
|
1607 'do-eol
|
|
|
1608 Do EOL detection.
|
|
|
1609
|
|
|
1610 'do-coding
|
|
|
1611 Do encoding detection.
|
|
|
1612
|
|
|
1613 'coding-system
|
|
|
1614 If encoding detection is not done, use the specified coding system
|
|
|
1615 to do decoding. This is used internally when implementing coding
|
|
|
1616 systems with an EOL type that specifies autodetection (the default),
|
|
|
1617 so that the detector routines return the proper subsidiary.
|
|
|
1618
|
|
|
1619
|
|
|
1620
|
|
|
1621 The following additional property is recognized if TYPE is 'gzip:
|
|
|
1622
|
|
|
1623 'level
|
|
|
1624 Compression level: 0 through 9, or `default' (currently 6).
|
|
|
1625
|
|
428
|
1626 */
|
|
771
|
1627 (name, type, description, props))
|
|
428
|
1628 {
|
|
771
|
1629 return make_coding_system_1 (name, 0, type, description, props);
|
|
428
|
1630 }
|
|
|
1631
|
|
|
1632 DEFUN ("copy-coding-system", Fcopy_coding_system, 2, 2, 0, /*
|
|
|
1633 Copy OLD-CODING-SYSTEM to NEW-NAME.
|
|
|
1634 If NEW-NAME does not name an existing coding system, a new one will
|
|
|
1635 be created.
|
|
771
|
1636 If you are using this function to create an alias, think again:
|
|
|
1637 Use `define-coding-system-alias' instead.
|
|
428
|
1638 */
|
|
|
1639 (old_coding_system, new_name))
|
|
|
1640 {
|
|
|
1641 Lisp_Object new_coding_system;
|
|
|
1642 old_coding_system = Fget_coding_system (old_coding_system);
|
|
771
|
1643 new_coding_system =
|
|
|
1644 UNBOUNDP (new_name) ? Qnil : Ffind_coding_system (new_name);
|
|
428
|
1645 if (NILP (new_coding_system))
|
|
|
1646 {
|
|
793
|
1647 new_coding_system =
|
|
|
1648 wrap_coding_system
|
|
|
1649 (allocate_coding_system
|
|
|
1650 (XCODING_SYSTEM (old_coding_system)->methods,
|
|
|
1651 XCODING_SYSTEM (old_coding_system)->methods->extra_data_size,
|
|
|
1652 new_name));
|
|
771
|
1653 if (!UNBOUNDP (new_name))
|
|
|
1654 Fputhash (new_name, new_coding_system, Vcoding_system_hash_table);
|
|
428
|
1655 }
|
|
771
|
1656 else if (XCODING_SYSTEM (old_coding_system)->methods !=
|
|
|
1657 XCODING_SYSTEM (new_coding_system)->methods)
|
|
|
1658 invalid_operation_2 ("Coding systems not same type",
|
|
|
1659 old_coding_system, new_coding_system);
|
|
428
|
1660
|
|
|
1661 {
|
|
|
1662 Lisp_Coding_System *to = XCODING_SYSTEM (new_coding_system);
|
|
|
1663 Lisp_Coding_System *from = XCODING_SYSTEM (old_coding_system);
|
|
771
|
1664 copy_sized_lcrecord (to, from, sizeof_coding_system (from));
|
|
428
|
1665 to->name = new_name;
|
|
|
1666 }
|
|
|
1667 return new_coding_system;
|
|
|
1668 }
|
|
|
1669
|
|
771
|
1670 DEFUN ("coding-system-canonical-name-p", Fcoding_system_canonical_name_p,
|
|
|
1671 1, 1, 0, /*
|
|
440
|
1672 Return t if OBJECT names a coding system, and is not a coding system alias.
|
|
428
|
1673 */
|
|
440
|
1674 (object))
|
|
|
1675 {
|
|
|
1676 return CODING_SYSTEMP (Fgethash (object, Vcoding_system_hash_table, Qnil))
|
|
|
1677 ? Qt : Qnil;
|
|
|
1678 }
|
|
|
1679
|
|
|
1680 DEFUN ("coding-system-alias-p", Fcoding_system_alias_p, 1, 1, 0, /*
|
|
|
1681 Return t if OBJECT is a coding system alias.
|
|
|
1682 All coding system aliases are created by `define-coding-system-alias'.
|
|
|
1683 */
|
|
|
1684 (object))
|
|
428
|
1685 {
|
|
440
|
1686 return SYMBOLP (Fgethash (object, Vcoding_system_hash_table, Qzero))
|
|
|
1687 ? Qt : Qnil;
|
|
|
1688 }
|
|
|
1689
|
|
|
1690 DEFUN ("coding-system-aliasee", Fcoding_system_aliasee, 1, 1, 0, /*
|
|
|
1691 Return the coding-system symbol for which symbol ALIAS is an alias.
|
|
|
1692 */
|
|
|
1693 (alias))
|
|
|
1694 {
|
|
|
1695 Lisp_Object aliasee = Fgethash (alias, Vcoding_system_hash_table, Qnil);
|
|
|
1696 if (SYMBOLP (aliasee))
|
|
|
1697 return aliasee;
|
|
|
1698 else
|
|
563
|
1699 invalid_argument ("Symbol is not a coding system alias", alias);
|
|
801
|
1700 RETURN_NOT_REACHED (Qnil)
|
|
440
|
1701 }
|
|
|
1702
|
|
|
1703 /* A maphash function, for removing dangling coding system aliases. */
|
|
|
1704 static int
|
|
|
1705 dangling_coding_system_alias_p (Lisp_Object alias,
|
|
|
1706 Lisp_Object aliasee,
|
|
|
1707 void *dangling_aliases)
|
|
|
1708 {
|
|
|
1709 if (SYMBOLP (aliasee)
|
|
|
1710 && NILP (Fgethash (aliasee, Vcoding_system_hash_table, Qnil)))
|
|
428
|
1711 {
|
|
440
|
1712 (*(int *) dangling_aliases)++;
|
|
|
1713 return 1;
|
|
428
|
1714 }
|
|
440
|
1715 else
|
|
|
1716 return 0;
|
|
|
1717 }
|
|
|
1718
|
|
|
1719 DEFUN ("define-coding-system-alias", Fdefine_coding_system_alias, 2, 2, 0, /*
|
|
|
1720 Define symbol ALIAS as an alias for coding system ALIASEE.
|
|
|
1721
|
|
|
1722 You can use this function to redefine an alias that has already been defined,
|
|
|
1723 but you cannot redefine a name which is the canonical name for a coding system.
|
|
|
1724 \(a canonical name of a coding system is what is returned when you call
|
|
|
1725 `coding-system-name' on a coding system).
|
|
|
1726
|
|
|
1727 ALIASEE itself can be an alias, which allows you to define nested aliases.
|
|
|
1728
|
|
|
1729 You are forbidden, however, from creating alias loops or `dangling' aliases.
|
|
|
1730 These will be detected, and an error will be signaled if you attempt to do so.
|
|
|
1731
|
|
|
1732 If ALIASEE is nil, then ALIAS will simply be undefined.
|
|
|
1733
|
|
|
1734 See also `coding-system-alias-p', `coding-system-aliasee',
|
|
|
1735 and `coding-system-canonical-name-p'.
|
|
|
1736 */
|
|
|
1737 (alias, aliasee))
|
|
|
1738 {
|
|
|
1739 Lisp_Object real_coding_system, probe;
|
|
|
1740
|
|
|
1741 CHECK_SYMBOL (alias);
|
|
|
1742
|
|
|
1743 if (!NILP (Fcoding_system_canonical_name_p (alias)))
|
|
563
|
1744 invalid_change
|
|
440
|
1745 ("Symbol is the canonical name of a coding system and cannot be redefined",
|
|
|
1746 alias);
|
|
|
1747
|
|
|
1748 if (NILP (aliasee))
|
|
|
1749 {
|
|
771
|
1750 Lisp_Object subsidiary_unix = add_suffix_to_symbol (alias, "-unix");
|
|
|
1751 Lisp_Object subsidiary_dos = add_suffix_to_symbol (alias, "-dos");
|
|
|
1752 Lisp_Object subsidiary_mac = add_suffix_to_symbol (alias, "-mac");
|
|
440
|
1753
|
|
|
1754 Fremhash (alias, Vcoding_system_hash_table);
|
|
|
1755
|
|
|
1756 /* Undefine subsidiary aliases,
|
|
|
1757 presumably created by a previous call to this function */
|
|
|
1758 if (! NILP (Fcoding_system_alias_p (subsidiary_unix)) &&
|
|
|
1759 ! NILP (Fcoding_system_alias_p (subsidiary_dos)) &&
|
|
|
1760 ! NILP (Fcoding_system_alias_p (subsidiary_mac)))
|
|
|
1761 {
|
|
|
1762 Fdefine_coding_system_alias (subsidiary_unix, Qnil);
|
|
|
1763 Fdefine_coding_system_alias (subsidiary_dos, Qnil);
|
|
|
1764 Fdefine_coding_system_alias (subsidiary_mac, Qnil);
|
|
|
1765 }
|
|
|
1766
|
|
|
1767 /* Undefine dangling coding system aliases. */
|
|
|
1768 {
|
|
|
1769 int dangling_aliases;
|
|
|
1770
|
|
|
1771 do {
|
|
|
1772 dangling_aliases = 0;
|
|
|
1773 elisp_map_remhash (dangling_coding_system_alias_p,
|
|
|
1774 Vcoding_system_hash_table,
|
|
|
1775 &dangling_aliases);
|
|
|
1776 } while (dangling_aliases > 0);
|
|
|
1777 }
|
|
|
1778
|
|
|
1779 return Qnil;
|
|
|
1780 }
|
|
|
1781
|
|
|
1782 if (CODING_SYSTEMP (aliasee))
|
|
|
1783 aliasee = XCODING_SYSTEM_NAME (aliasee);
|
|
|
1784
|
|
|
1785 /* Checks that aliasee names a coding-system */
|
|
|
1786 real_coding_system = Fget_coding_system (aliasee);
|
|
|
1787
|
|
|
1788 /* Check for coding system alias loops */
|
|
|
1789 if (EQ (alias, aliasee))
|
|
563
|
1790 alias_loop: invalid_operation_2
|
|
440
|
1791 ("Attempt to create a coding system alias loop", alias, aliasee);
|
|
|
1792
|
|
|
1793 for (probe = aliasee;
|
|
|
1794 SYMBOLP (probe);
|
|
|
1795 probe = Fgethash (probe, Vcoding_system_hash_table, Qzero))
|
|
|
1796 {
|
|
|
1797 if (EQ (probe, alias))
|
|
|
1798 goto alias_loop;
|
|
|
1799 }
|
|
|
1800
|
|
|
1801 Fputhash (alias, aliasee, Vcoding_system_hash_table);
|
|
|
1802
|
|
|
1803 /* Set up aliases for subsidiaries.
|
|
|
1804 #### There must be a better way to handle subsidiary coding systems. */
|
|
|
1805 {
|
|
|
1806 static const char *suffixes[] = { "-unix", "-dos", "-mac" };
|
|
|
1807 int i;
|
|
|
1808 for (i = 0; i < countof (suffixes); i++)
|
|
|
1809 {
|
|
|
1810 Lisp_Object alias_subsidiary =
|
|
771
|
1811 add_suffix_to_symbol (alias, suffixes[i]);
|
|
440
|
1812 Lisp_Object aliasee_subsidiary =
|
|
771
|
1813 add_suffix_to_symbol (aliasee, suffixes[i]);
|
|
440
|
1814
|
|
|
1815 if (! NILP (Ffind_coding_system (aliasee_subsidiary)))
|
|
|
1816 Fdefine_coding_system_alias (alias_subsidiary, aliasee_subsidiary);
|
|
|
1817 }
|
|
|
1818 }
|
|
428
|
1819 /* FSF return value is a vector of [ALIAS-unix ALIAS-dos ALIAS-mac],
|
|
|
1820 but it doesn't look intentional, so I'd rather return something
|
|
|
1821 meaningful or nothing at all. */
|
|
|
1822 return Qnil;
|
|
|
1823 }
|
|
|
1824
|
|
|
1825 static Lisp_Object
|
|
771
|
1826 subsidiary_coding_system (Lisp_Object coding_system, enum eol_type type)
|
|
428
|
1827 {
|
|
|
1828 Lisp_Coding_System *cs = XCODING_SYSTEM (coding_system);
|
|
|
1829 Lisp_Object new_coding_system;
|
|
|
1830
|
|
|
1831 switch (type)
|
|
|
1832 {
|
|
|
1833 case EOL_AUTODETECT: return coding_system;
|
|
|
1834 case EOL_LF: new_coding_system = CODING_SYSTEM_EOL_LF (cs); break;
|
|
|
1835 case EOL_CR: new_coding_system = CODING_SYSTEM_EOL_CR (cs); break;
|
|
|
1836 case EOL_CRLF: new_coding_system = CODING_SYSTEM_EOL_CRLF (cs); break;
|
|
442
|
1837 default: abort (); return Qnil;
|
|
428
|
1838 }
|
|
|
1839
|
|
|
1840 return NILP (new_coding_system) ? coding_system : new_coding_system;
|
|
|
1841 }
|
|
|
1842
|
|
|
1843 DEFUN ("subsidiary-coding-system", Fsubsidiary_coding_system, 2, 2, 0, /*
|
|
|
1844 Return the subsidiary coding system of CODING-SYSTEM with eol type EOL-TYPE.
|
|
771
|
1845 The logically opposite operation is `coding-system-base'.
|
|
428
|
1846 */
|
|
|
1847 (coding_system, eol_type))
|
|
|
1848 {
|
|
771
|
1849 coding_system = get_coding_system_for_text_file (coding_system, 0);
|
|
428
|
1850
|
|
|
1851 return subsidiary_coding_system (coding_system,
|
|
|
1852 symbol_to_eol_type (eol_type));
|
|
|
1853 }
|
|
|
1854
|
|
771
|
1855 DEFUN ("coding-system-base", Fcoding_system_base,
|
|
|
1856 1, 1, 0, /*
|
|
|
1857 Return the base coding system of CODING-SYSTEM.
|
|
|
1858 If CODING-SYSTEM is a subsidiary, this returns its parent; otherwise, it
|
|
|
1859 returns CODING-SYSTEM.
|
|
|
1860 The logically opposite operation is `subsidiary-coding-system'.
|
|
|
1861 */
|
|
|
1862 (coding_system))
|
|
|
1863 {
|
|
|
1864 Lisp_Object base;
|
|
|
1865
|
|
|
1866 coding_system = Fget_coding_system (coding_system);
|
|
|
1867 if (EQ (XCODING_SYSTEM_NAME (coding_system), Qbinary))
|
|
|
1868 return Fget_coding_system (Qraw_text); /* hack! */
|
|
|
1869 base = XCODING_SYSTEM_SUBSIDIARY_PARENT (coding_system);
|
|
|
1870 if (!NILP (base))
|
|
|
1871 return base;
|
|
|
1872 return coding_system;
|
|
|
1873 }
|
|
|
1874
|
|
|
1875 DEFUN ("coding-system-used-for-io", Fcoding_system_used_for_io,
|
|
|
1876 1, 1, 0, /*
|
|
|
1877 Return the coding system actually used for I/O.
|
|
|
1878 In some cases (e.g. when a particular EOL type is specified) this won't be
|
|
|
1879 the coding system itself. This can be useful when trying to track down
|
|
|
1880 more closely how exactly data is decoded.
|
|
|
1881 */
|
|
|
1882 (coding_system))
|
|
|
1883 {
|
|
|
1884 Lisp_Object canon;
|
|
|
1885
|
|
|
1886 coding_system = Fget_coding_system (coding_system);
|
|
|
1887 canon = XCODING_SYSTEM_CANONICAL (coding_system);
|
|
|
1888 if (!NILP (canon))
|
|
|
1889 return canon;
|
|
|
1890 return coding_system;
|
|
|
1891 }
|
|
|
1892
|
|
428
|
1893
|
|
|
1894 /************************************************************************/
|
|
|
1895 /* Coding system accessors */
|
|
|
1896 /************************************************************************/
|
|
|
1897
|
|
771
|
1898 DEFUN ("coding-system-description", Fcoding_system_description, 1, 1, 0, /*
|
|
|
1899 Return the description for CODING-SYSTEM.
|
|
|
1900 The `description' of a coding system is a short English phrase giving the
|
|
|
1901 name rendered according to English punctuation rules, plus possibly some
|
|
|
1902 explanatory text (typically in the form of a parenthetical phrase). The
|
|
|
1903 description is intended to be short enough that it can appear as a menu item,
|
|
|
1904 and clear enough to be recognizable even to someone who is assumed to have
|
|
|
1905 some basic familiarity with different encodings but may not know all the
|
|
|
1906 technical names; thus, for `cn-gb-2312' is described as "Chinese EUC" and
|
|
|
1907 `hz-gb-2312' is described as "Hz/ZW (Chinese)", where the actual name of
|
|
|
1908 the encoding is given, followed by a note that this is a Chinese encoding,
|
|
|
1909 because the great majority of people encountering this would have no idea
|
|
|
1910 what it is, and giving the language indicates whether the encoding should
|
|
|
1911 just be ignored or (conceivably) investigated more thoroughly.
|
|
428
|
1912 */
|
|
|
1913 (coding_system))
|
|
|
1914 {
|
|
|
1915 coding_system = Fget_coding_system (coding_system);
|
|
771
|
1916 return XCODING_SYSTEM_DESCRIPTION (coding_system);
|
|
428
|
1917 }
|
|
|
1918
|
|
|
1919 DEFUN ("coding-system-type", Fcoding_system_type, 1, 1, 0, /*
|
|
|
1920 Return the type of CODING-SYSTEM.
|
|
|
1921 */
|
|
|
1922 (coding_system))
|
|
|
1923 {
|
|
771
|
1924 coding_system = Fget_coding_system (coding_system);
|
|
|
1925 return XCODING_SYSTEM_TYPE (coding_system);
|
|
428
|
1926 }
|
|
|
1927
|
|
|
1928 DEFUN ("coding-system-property", Fcoding_system_property, 2, 2, 0, /*
|
|
|
1929 Return the PROP property of CODING-SYSTEM.
|
|
|
1930 */
|
|
|
1931 (coding_system, prop))
|
|
|
1932 {
|
|
|
1933 coding_system = Fget_coding_system (coding_system);
|
|
|
1934 CHECK_SYMBOL (prop);
|
|
|
1935
|
|
|
1936 if (EQ (prop, Qname))
|
|
|
1937 return XCODING_SYSTEM_NAME (coding_system);
|
|
|
1938 else if (EQ (prop, Qtype))
|
|
|
1939 return Fcoding_system_type (coding_system);
|
|
771
|
1940 else if (EQ (prop, Qdescription))
|
|
|
1941 return XCODING_SYSTEM_DESCRIPTION (coding_system);
|
|
428
|
1942 else if (EQ (prop, Qmnemonic))
|
|
|
1943 return XCODING_SYSTEM_MNEMONIC (coding_system);
|
|
771
|
1944 else if (EQ (prop, Qdocumentation))
|
|
|
1945 return XCODING_SYSTEM_DOCUMENTATION (coding_system);
|
|
428
|
1946 else if (EQ (prop, Qeol_type))
|
|
771
|
1947 return eol_type_to_symbol (XCODING_SYSTEM_EOL_TYPE
|
|
|
1948 (coding_system));
|
|
428
|
1949 else if (EQ (prop, Qeol_lf))
|
|
|
1950 return XCODING_SYSTEM_EOL_LF (coding_system);
|
|
|
1951 else if (EQ (prop, Qeol_crlf))
|
|
|
1952 return XCODING_SYSTEM_EOL_CRLF (coding_system);
|
|
|
1953 else if (EQ (prop, Qeol_cr))
|
|
|
1954 return XCODING_SYSTEM_EOL_CR (coding_system);
|
|
|
1955 else if (EQ (prop, Qpost_read_conversion))
|
|
|
1956 return XCODING_SYSTEM_POST_READ_CONVERSION (coding_system);
|
|
|
1957 else if (EQ (prop, Qpre_write_conversion))
|
|
|
1958 return XCODING_SYSTEM_PRE_WRITE_CONVERSION (coding_system);
|
|
771
|
1959 else
|
|
|
1960 {
|
|
|
1961 Lisp_Object value = CODESYSMETH_OR_GIVEN (XCODING_SYSTEM (coding_system),
|
|
|
1962 getprop,
|
|
|
1963 (coding_system, prop),
|
|
|
1964 Qunbound);
|
|
|
1965 if (UNBOUNDP (value))
|
|
|
1966 invalid_constant ("Unrecognized property", prop);
|
|
|
1967 return value;
|
|
|
1968 }
|
|
|
1969 }
|
|
|
1970
|
|
|
1971
|
|
|
1972 /************************************************************************/
|
|
|
1973 /* Coding stream functions */
|
|
|
1974 /************************************************************************/
|
|
|
1975
|
|
|
1976 /* A coding stream is a stream used for encoding or decoding text. The
|
|
|
1977 coding-stream object keeps track of the actual coding system, the stream
|
|
|
1978 that is at the other end, and data that needs to be persistent across
|
|
|
1979 the lifetime of the stream. */
|
|
|
1980
|
|
|
1981 DEFINE_LSTREAM_IMPLEMENTATION ("coding", coding);
|
|
|
1982
|
|
|
1983 /* Encoding and decoding are parallel operations, so we create just one
|
|
|
1984 stream for both. "Decoding" may involve the extra step of autodetection
|
|
|
1985 of the data format, but that's only because of the conventional
|
|
|
1986 definition of decoding as converting from external- to
|
|
|
1987 internal-formatted data.
|
|
|
1988
|
|
|
1989 #### We really need to abstract out the concept of "data formats" and
|
|
|
1990 define "converters" that convert from and to specified formats,
|
|
|
1991 eliminating the idea of decoding and encoding. When specifying a
|
|
|
1992 conversion process, we need to give the data formats themselves, not the
|
|
|
1993 conversion processes -- e.g. a coding system called "Unicode->multibyte"
|
|
|
1994 converts in both directions, and we could auto-detect the format of data
|
|
|
1995 at either end. */
|
|
|
1996
|
|
|
1997 static Bytecount
|
|
|
1998 coding_reader (Lstream *stream, unsigned char *data, Bytecount size)
|
|
|
1999 {
|
|
|
2000 unsigned char *orig_data = data;
|
|
|
2001 Bytecount read_size;
|
|
|
2002 int error_occurred = 0;
|
|
|
2003 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
2004
|
|
|
2005 /* We need to interface to coding_{de,en}code_1(), which expects to take
|
|
|
2006 some amount of data and store the result into a Dynarr. We have
|
|
|
2007 coding_{de,en}code_1() store into c->runoff, and take data from there
|
|
|
2008 as necessary. */
|
|
|
2009
|
|
|
2010 /* We loop until we have enough data, reading chunks from the other
|
|
|
2011 end and converting it. */
|
|
|
2012 while (1)
|
|
|
2013 {
|
|
|
2014 /* Take data from convert_to if we can. Make sure to take at
|
|
|
2015 most SIZE bytes, and delete the data from convert_to. */
|
|
|
2016 if (Dynarr_length (str->convert_to) > 0)
|
|
|
2017 {
|
|
|
2018 Bytecount chunk =
|
|
|
2019 min (size, (Bytecount) Dynarr_length (str->convert_to));
|
|
|
2020 memcpy (data, Dynarr_atp (str->convert_to, 0), chunk);
|
|
|
2021 Dynarr_delete_many (str->convert_to, 0, chunk);
|
|
|
2022 data += chunk;
|
|
|
2023 size -= chunk;
|
|
|
2024 }
|
|
|
2025
|
|
|
2026 if (size == 0)
|
|
|
2027 break; /* No more room for data */
|
|
|
2028
|
|
|
2029 if (str->eof)
|
|
|
2030 break;
|
|
|
2031
|
|
|
2032 {
|
|
|
2033 /* Exhausted convert_to, so get some more. Read into convert_from,
|
|
|
2034 after existing "rejected" data from the last conversion. */
|
|
|
2035 Bytecount rejected = Dynarr_length (str->convert_from);
|
|
|
2036 /* #### 1024 is arbitrary; we really need to separate 0 from EOF,
|
|
|
2037 and when we get 0, keep taking more data until we don't get 0 --
|
|
|
2038 we don't know how much data the conversion routine might need
|
|
|
2039 before it can generate any data of its own */
|
|
|
2040 Bytecount readmore = max (size, 1024);
|
|
|
2041
|
|
|
2042 Dynarr_add_many (str->convert_from, 0, readmore);
|
|
|
2043 read_size = Lstream_read (str->other_end,
|
|
|
2044 Dynarr_atp (str->convert_from, rejected),
|
|
|
2045 readmore);
|
|
|
2046 /* Trim size down to how much we actually got */
|
|
|
2047 Dynarr_set_size (str->convert_from, rejected + max (0, read_size));
|
|
|
2048 }
|
|
|
2049
|
|
|
2050 if (read_size < 0) /* LSTREAM_ERROR */
|
|
|
2051 {
|
|
|
2052 error_occurred = 1;
|
|
|
2053 break;
|
|
|
2054 }
|
|
|
2055 if (read_size == 0) /* LSTREAM_EOF */
|
|
|
2056 /* There might be some more end data produced in the translation,
|
|
|
2057 so we set a flag and call the conversion method once more to
|
|
|
2058 output any final stuff it may be holding, any "go back to a sane
|
|
|
2059 state" escape sequences, etc. The conversion method is free to
|
|
|
2060 look at this flag, and we use it above to stop looping. */
|
|
|
2061 str->eof = 1;
|
|
|
2062 {
|
|
|
2063 Bytecount processed;
|
|
|
2064 Bytecount to_process = Dynarr_length (str->convert_from);
|
|
|
2065
|
|
|
2066 /* Convert the data, and save any rejected data in convert_from */
|
|
|
2067 processed =
|
|
|
2068 XCODESYSMETH (str->codesys, convert,
|
|
|
2069 (str, Dynarr_atp (str->convert_from, 0),
|
|
|
2070 str->convert_to, to_process));
|
|
|
2071 if (processed < 0)
|
|
|
2072 {
|
|
|
2073 error_occurred = 1;
|
|
|
2074 break;
|
|
|
2075 }
|
|
|
2076 assert (processed <= to_process);
|
|
|
2077 if (processed < to_process)
|
|
|
2078 memmove (Dynarr_atp (str->convert_from, 0),
|
|
|
2079 Dynarr_atp (str->convert_from, processed),
|
|
|
2080 to_process - processed);
|
|
|
2081 Dynarr_set_size (str->convert_from, to_process - processed);
|
|
|
2082 }
|
|
|
2083 }
|
|
|
2084
|
|
|
2085 if (data - orig_data == 0)
|
|
|
2086 return error_occurred ? -1 : 0;
|
|
|
2087 else
|
|
|
2088 return data - orig_data;
|
|
|
2089 }
|
|
|
2090
|
|
|
2091 static Bytecount
|
|
|
2092 coding_writer (Lstream *stream, const unsigned char *data, Bytecount size)
|
|
|
2093 {
|
|
|
2094 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
2095
|
|
|
2096 /* Convert all our data into convert_to, and then attempt to write
|
|
|
2097 it all out to the other end. */
|
|
|
2098 Dynarr_reset (str->convert_to);
|
|
|
2099 size = XCODESYSMETH (str->codesys, convert,
|
|
|
2100 (str, data, str->convert_to, size));
|
|
|
2101 if (Lstream_write (str->other_end, Dynarr_atp (str->convert_to, 0),
|
|
|
2102 Dynarr_length (str->convert_to)) < 0)
|
|
|
2103 return -1;
|
|
|
2104 else
|
|
|
2105 /* The return value indicates how much of the incoming data was
|
|
|
2106 processed, not how many bytes were written. */
|
|
|
2107 return size;
|
|
|
2108 }
|
|
|
2109
|
|
|
2110 static int
|
|
|
2111 encode_decode_source_sink_type_is_char (Lisp_Object cs,
|
|
|
2112 enum source_or_sink sex,
|
|
|
2113 enum encode_decode direction)
|
|
|
2114 {
|
|
|
2115 return (direction == CODING_DECODE ?
|
|
|
2116 decoding_source_sink_type_is_char (cs, sex) :
|
|
|
2117 encoding_source_sink_type_is_char (cs, sex));
|
|
|
2118 }
|
|
|
2119
|
|
|
2120 /* Ensure that the convert methods only get full characters sent to them to
|
|
|
2121 convert if the source of that conversion is characters; and that no such
|
|
|
2122 full-character checking happens when the source is bytes. Keep in mind
|
|
|
2123 that (1) the conversion_end_type return values take the perspective of
|
|
|
2124 encoding; (2) the source for decoding is the same as the sink for
|
|
|
2125 encoding; (3) when writing, the data is given to us, and we set our own
|
|
|
2126 stream to be character mode or not; (4) when reading, the data comes
|
|
|
2127 from the other_end stream, and we set that one to be character mode or
|
|
|
2128 not. This is consistent with the comment above the prototype for
|
|
|
2129 Lstream_set_character_mode(), which lays out rules for who is allowed to
|
|
|
2130 modify the character type mode on a stream.
|
|
|
2131
|
|
|
2132 NOTE: We could potentially implement the full-character checking stuff
|
|
|
2133 ourselves, which might be a bit safer in case people mess up the
|
|
|
2134 character mode themselves. But people shouldn't be doing that -- don't
|
|
|
2135 hide bugs -- and there's no sense duplicating code. */
|
|
|
2136
|
|
|
2137 static void
|
|
|
2138 set_coding_character_mode (Lstream *stream)
|
|
|
2139 {
|
|
|
2140 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
2141 Lstream *stream_to_set =
|
|
|
2142 stream->flags & LSTREAM_FL_WRITE ? stream : str->other_end;
|
|
|
2143 if (encode_decode_source_sink_type_is_char
|
|
|
2144 (str->codesys, CODING_SOURCE, str->direction))
|
|
|
2145 Lstream_set_character_mode (stream_to_set);
|
|
|
2146 else
|
|
|
2147 Lstream_unset_character_mode (stream_to_set);
|
|
|
2148 }
|
|
|
2149
|
|
|
2150 static Lisp_Object
|
|
|
2151 coding_marker (Lisp_Object stream)
|
|
|
2152 {
|
|
|
2153 struct coding_stream *str = CODING_STREAM_DATA (XLSTREAM (stream));
|
|
|
2154
|
|
|
2155 mark_object (str->orig_codesys);
|
|
|
2156 mark_object (str->codesys);
|
|
|
2157 MAYBE_XCODESYSMETH (str->codesys, mark_coding_stream, (str));
|
|
|
2158 return wrap_lstream (str->other_end);
|
|
|
2159 }
|
|
|
2160
|
|
|
2161 static int
|
|
|
2162 coding_rewinder (Lstream *stream)
|
|
|
2163 {
|
|
|
2164 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
2165 MAYBE_XCODESYSMETH (str->codesys, rewind_coding_stream, (str));
|
|
|
2166
|
|
|
2167 str->ch = 0;
|
|
|
2168 Dynarr_reset (str->convert_to);
|
|
|
2169 Dynarr_reset (str->convert_from);
|
|
|
2170 return Lstream_rewind (str->other_end);
|
|
|
2171 }
|
|
|
2172
|
|
|
2173 static int
|
|
|
2174 coding_seekable_p (Lstream *stream)
|
|
|
2175 {
|
|
|
2176 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
2177 return Lstream_seekable_p (str->other_end);
|
|
|
2178 }
|
|
|
2179
|
|
|
2180 static int
|
|
|
2181 coding_flusher (Lstream *stream)
|
|
|
2182 {
|
|
|
2183 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
2184 return Lstream_flush (str->other_end);
|
|
|
2185 }
|
|
|
2186
|
|
|
2187 static int
|
|
|
2188 coding_closer (Lstream *stream)
|
|
|
2189 {
|
|
|
2190 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
2191 if (stream->flags & LSTREAM_FL_WRITE)
|
|
|
2192 {
|
|
|
2193 str->eof = 1;
|
|
|
2194 coding_writer (stream, 0, 0);
|
|
|
2195 str->eof = 0;
|
|
|
2196 }
|
|
|
2197 /* It's safe to free the runoff dynarrs now because they are used only
|
|
|
2198 during conversion. We need to keep the type-specific data around,
|
|
|
2199 though, because of canonicalize_after_coding. */
|
|
|
2200 if (str->convert_to)
|
|
|
2201 {
|
|
|
2202 Dynarr_free (str->convert_to);
|
|
|
2203 str->convert_to = 0;
|
|
|
2204 }
|
|
|
2205 if (str->convert_from)
|
|
428
|
2206 {
|
|
771
|
2207 Dynarr_free (str->convert_from);
|
|
|
2208 str->convert_from = 0;
|
|
|
2209 }
|
|
|
2210
|
|
800
|
2211 if (str->no_close_other)
|
|
|
2212 return Lstream_flush (str->other_end);
|
|
|
2213 else
|
|
|
2214 return Lstream_close (str->other_end);
|
|
771
|
2215 }
|
|
|
2216
|
|
|
2217 static void
|
|
|
2218 coding_finalizer (Lstream *stream)
|
|
|
2219 {
|
|
|
2220 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
2221
|
|
|
2222 assert (!str->finalized);
|
|
|
2223 MAYBE_XCODESYSMETH (str->codesys, finalize_coding_stream, (str));
|
|
|
2224 if (str->data)
|
|
|
2225 {
|
|
|
2226 xfree (str->data);
|
|
|
2227 str->data = 0;
|
|
|
2228 }
|
|
|
2229 str->finalized = 1;
|
|
|
2230 }
|
|
|
2231
|
|
|
2232 static Lisp_Object
|
|
|
2233 coding_stream_canonicalize_after_coding (Lstream *stream)
|
|
|
2234 {
|
|
|
2235 struct coding_stream *str = CODING_STREAM_DATA (stream);
|
|
|
2236
|
|
|
2237 return XCODESYSMETH_OR_GIVEN (str->codesys, canonicalize_after_coding,
|
|
|
2238 (str), str->codesys);
|
|
|
2239 }
|
|
|
2240
|
|
|
2241 Lisp_Object
|
|
|
2242 coding_stream_detected_coding_system (Lstream *stream)
|
|
|
2243 {
|
|
|
2244 Lisp_Object codesys =
|
|
|
2245 coding_stream_canonicalize_after_coding (stream);
|
|
|
2246 if (NILP (codesys))
|
|
|
2247 return Fget_coding_system (Qidentity);
|
|
|
2248 return codesys;
|
|
|
2249 }
|
|
|
2250
|
|
|
2251 Lisp_Object
|
|
|
2252 coding_stream_coding_system (Lstream *stream)
|
|
|
2253 {
|
|
|
2254 return CODING_STREAM_DATA (stream)->codesys;
|
|
|
2255 }
|
|
|
2256
|
|
|
2257 /* Change the coding system associated with a stream. */
|
|
|
2258
|
|
|
2259 void
|
|
|
2260 set_coding_stream_coding_system (Lstream *lstr, Lisp_Object codesys)
|
|
|
2261 {
|
|
|
2262 struct coding_stream *str = CODING_STREAM_DATA (lstr);
|
|
|
2263 if (EQ (str->orig_codesys, codesys))
|
|
|
2264 return;
|
|
|
2265 /* We do the equivalent of closing the stream, destroying it, and
|
|
|
2266 reinitializing it. This includes flushing out the data and signalling
|
|
|
2267 EOF, if we're a writing stream; we also replace the type-specific data
|
|
|
2268 with the data appropriate for the new coding system. */
|
|
|
2269 if (!NILP (str->codesys))
|
|
|
2270 {
|
|
|
2271 if (lstr->flags & LSTREAM_FL_WRITE)
|
|
|
2272 {
|
|
|
2273 Lstream_flush (lstr);
|
|
|
2274 str->eof = 1;
|
|
|
2275 coding_writer (lstr, 0, 0);
|
|
|
2276 str->eof = 0;
|
|
|
2277 }
|
|
|
2278 MAYBE_XCODESYSMETH (str->codesys, finalize_coding_stream, (str));
|
|
|
2279 }
|
|
|
2280 str->orig_codesys = codesys;
|
|
|
2281 str->codesys = coding_system_real_canonical (codesys);
|
|
|
2282
|
|
|
2283 if (str->data)
|
|
|
2284 {
|
|
|
2285 xfree (str->data);
|
|
|
2286 str->data = 0;
|
|
428
|
2287 }
|
|
771
|
2288 if (XCODING_SYSTEM_METHODS (str->codesys)->coding_data_size)
|
|
|
2289 str->data =
|
|
|
2290 xmalloc_and_zero (XCODING_SYSTEM_METHODS (str->codesys)->
|
|
|
2291 coding_data_size);
|
|
|
2292 MAYBE_XCODESYSMETH (str->codesys, init_coding_stream, (str));
|
|
|
2293 /* The new coding system may have different ideas regarding whether its
|
|
|
2294 ends are characters or bytes. */
|
|
|
2295 set_coding_character_mode (lstr);
|
|
|
2296 }
|
|
|
2297
|
|
|
2298 /* WARNING WARNING WARNING WARNING!!!!! If you open up a coding
|
|
|
2299 stream for writing, no automatic code detection will be performed.
|
|
|
2300 The reason for this is that automatic code detection requires a
|
|
|
2301 seekable input. Things will also fail if you open a coding
|
|
|
2302 stream for reading using a non-fully-specified coding system and
|
|
|
2303 a non-seekable input stream. */
|
|
|
2304
|
|
|
2305 static Lisp_Object
|
|
|
2306 make_coding_stream_1 (Lstream *stream, Lisp_Object codesys,
|
|
800
|
2307 const char *mode, enum encode_decode direction,
|
|
|
2308 int no_close_other)
|
|
771
|
2309 {
|
|
|
2310 Lstream *lstr = Lstream_new (lstream_coding, mode);
|
|
|
2311 struct coding_stream *str = CODING_STREAM_DATA (lstr);
|
|
|
2312
|
|
|
2313 codesys = Fget_coding_system (codesys);
|
|
|
2314 xzero (*str);
|
|
|
2315 str->codesys = Qnil;
|
|
|
2316 str->orig_codesys = Qnil;
|
|
|
2317 str->us = lstr;
|
|
|
2318 str->other_end = stream;
|
|
|
2319 str->convert_to = Dynarr_new (unsigned_char);
|
|
|
2320 str->convert_from = Dynarr_new (unsigned_char);
|
|
|
2321 str->direction = direction;
|
|
800
|
2322 str->no_close_other = no_close_other;
|
|
771
|
2323 set_coding_stream_coding_system (lstr, codesys);
|
|
793
|
2324 return wrap_lstream (lstr);
|
|
771
|
2325 }
|
|
|
2326
|
|
800
|
2327 /* If NO_CLOSE_OTHER is non-zero, don't close STREAM (the stream at the
|
|
|
2328 other end) when this stream is closed. */
|
|
771
|
2329 Lisp_Object
|
|
|
2330 make_coding_input_stream (Lstream *stream, Lisp_Object codesys,
|
|
800
|
2331 enum encode_decode direction, int no_close_other)
|
|
771
|
2332 {
|
|
800
|
2333 return make_coding_stream_1 (stream, codesys, "r", direction,
|
|
|
2334 no_close_other);
|
|
771
|
2335 }
|
|
|
2336
|
|
800
|
2337 /* If NO_CLOSE_OTHER is non-zero, don't close STREAM (the stream at the
|
|
|
2338 other end) when this stream is closed. */
|
|
771
|
2339 Lisp_Object
|
|
|
2340 make_coding_output_stream (Lstream *stream, Lisp_Object codesys,
|
|
800
|
2341 enum encode_decode direction, int no_close_other)
|
|
771
|
2342 {
|
|
800
|
2343 return make_coding_stream_1 (stream, codesys, "w", direction,
|
|
|
2344 no_close_other);
|
|
771
|
2345 }
|
|
|
2346
|
|
|
2347 static Lisp_Object
|
|
|
2348 encode_decode_coding_region (Lisp_Object start, Lisp_Object end,
|
|
|
2349 Lisp_Object coding_system, Lisp_Object buffer,
|
|
|
2350 enum encode_decode direction)
|
|
|
2351 {
|
|
|
2352 Charbpos b, e;
|
|
|
2353 struct buffer *buf = decode_buffer (buffer, 0);
|
|
|
2354 Lisp_Object instream = Qnil, to_outstream = Qnil, outstream = Qnil;
|
|
|
2355 Lisp_Object from_outstream = Qnil, auto_outstream = Qnil;
|
|
|
2356 Lisp_Object lb_outstream = Qnil;
|
|
|
2357 Lisp_Object next;
|
|
|
2358 Lstream *istr, *ostr;
|
|
|
2359 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
|
|
|
2360 struct gcpro ngcpro1;
|
|
|
2361 int source_char, sink_char;
|
|
|
2362
|
|
|
2363 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
|
2364 barf_if_buffer_read_only (buf, b, e);
|
|
|
2365
|
|
|
2366 GCPRO5 (instream, to_outstream, outstream, from_outstream, lb_outstream);
|
|
|
2367 NGCPRO1 (auto_outstream);
|
|
|
2368
|
|
|
2369 coding_system = Fget_coding_system (coding_system);
|
|
|
2370 source_char = encode_decode_source_sink_type_is_char (coding_system,
|
|
|
2371 CODING_SOURCE,
|
|
|
2372 direction);
|
|
|
2373 sink_char = encode_decode_source_sink_type_is_char (coding_system,
|
|
|
2374 CODING_SINK,
|
|
|
2375 direction);
|
|
|
2376
|
|
|
2377 /* Order is IN <---> [TO] -> OUT -> [FROM] -> [AUTODETECT-EOL] -> LB */
|
|
|
2378 instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
|
2379 next = lb_outstream = make_lisp_buffer_output_stream (buf, b, 0);
|
|
|
2380
|
|
|
2381 if (direction == CODING_DECODE &&
|
|
|
2382 XCODING_SYSTEM_EOL_TYPE (coding_system) == EOL_AUTODETECT)
|
|
|
2383 next = auto_outstream =
|
|
|
2384 make_coding_output_stream
|
|
800
|
2385 (XLSTREAM (next), Fget_coding_system (Qconvert_eol_autodetect),
|
|
|
2386 CODING_DECODE, 0);
|
|
771
|
2387
|
|
|
2388 if (!sink_char)
|
|
|
2389 next = from_outstream =
|
|
800
|
2390 make_coding_output_stream (XLSTREAM (next), Qbinary, CODING_DECODE, 0);
|
|
771
|
2391 outstream = make_coding_output_stream (XLSTREAM (next), coding_system,
|
|
800
|
2392 direction, 0);
|
|
771
|
2393 if (!source_char)
|
|
428
|
2394 {
|
|
771
|
2395 to_outstream =
|
|
|
2396 make_coding_output_stream (XLSTREAM (outstream),
|
|
800
|
2397 Qbinary, CODING_ENCODE, 0);
|
|
771
|
2398 ostr = XLSTREAM (to_outstream);
|
|
|
2399 }
|
|
|
2400 else
|
|
|
2401 ostr = XLSTREAM (outstream);
|
|
|
2402 istr = XLSTREAM (instream);
|
|
|
2403
|
|
|
2404 /* The chain of streams looks like this:
|
|
|
2405
|
|
|
2406 [BUFFER] <----- send through
|
|
|
2407 ------> [CHAR->BYTE i.e. ENCODE AS BINARY if source is
|
|
|
2408 in bytes]
|
|
|
2409 ------> [ENCODE/DECODE AS SPECIFIED]
|
|
|
2410 ------> [BYTE->CHAR i.e. DECODE AS BINARY
|
|
|
2411 if sink is in bytes]
|
|
|
2412 ------> [AUTODETECT EOL if
|
|
|
2413 we're decoding and
|
|
|
2414 coding system calls
|
|
|
2415 for this]
|
|
|
2416 ------> [BUFFER]
|
|
|
2417 */
|
|
|
2418 while (1)
|
|
|
2419 {
|
|
|
2420 char tempbuf[1024]; /* some random amount */
|
|
|
2421 Charbpos newpos, even_newer_pos;
|
|
|
2422 Charbpos oldpos = lisp_buffer_stream_startpos (istr);
|
|
|
2423 Bytecount size_in_bytes =
|
|
|
2424 Lstream_read (istr, tempbuf, sizeof (tempbuf));
|
|
|
2425
|
|
|
2426 if (!size_in_bytes)
|
|
|
2427 break;
|
|
|
2428 newpos = lisp_buffer_stream_startpos (istr);
|
|
|
2429 Lstream_write (ostr, tempbuf, size_in_bytes);
|
|
|
2430 even_newer_pos = lisp_buffer_stream_startpos (istr);
|
|
|
2431 buffer_delete_range (buf, even_newer_pos - (newpos - oldpos),
|
|
|
2432 even_newer_pos, 0);
|
|
428
|
2433 }
|
|
771
|
2434
|
|
|
2435 {
|
|
|
2436 Charcount retlen =
|
|
|
2437 lisp_buffer_stream_startpos (XLSTREAM (instream)) - b;
|
|
|
2438 Lstream_close (istr);
|
|
|
2439 Lstream_close (ostr);
|
|
|
2440 NUNGCPRO;
|
|
|
2441 UNGCPRO;
|
|
|
2442 Lstream_delete (istr);
|
|
|
2443 if (!NILP (from_outstream))
|
|
|
2444 Lstream_delete (XLSTREAM (from_outstream));
|
|
|
2445 Lstream_delete (XLSTREAM (outstream));
|
|
|
2446 if (!NILP (to_outstream))
|
|
|
2447 Lstream_delete (XLSTREAM (to_outstream));
|
|
|
2448 if (!NILP (auto_outstream))
|
|
|
2449 Lstream_delete (XLSTREAM (auto_outstream));
|
|
|
2450 Lstream_delete (XLSTREAM (lb_outstream));
|
|
|
2451 return make_int (retlen);
|
|
|
2452 }
|
|
|
2453 }
|
|
|
2454
|
|
|
2455 DEFUN ("decode-coding-region", Fdecode_coding_region, 3, 4, 0, /*
|
|
|
2456 Decode the text between START and END which is encoded in CODING-SYSTEM.
|
|
|
2457 This is useful if you've read in encoded text from a file without decoding
|
|
|
2458 it (e.g. you read in a JIS-formatted file but used the `binary' or
|
|
|
2459 `no-conversion' coding system, so that it shows up as "^[$B!<!+^[(B").
|
|
|
2460 Return length of decoded text.
|
|
|
2461 BUFFER defaults to the current buffer if unspecified.
|
|
|
2462 */
|
|
|
2463 (start, end, coding_system, buffer))
|
|
|
2464 {
|
|
|
2465 return encode_decode_coding_region (start, end, coding_system, buffer,
|
|
|
2466 CODING_DECODE);
|
|
|
2467 }
|
|
|
2468
|
|
|
2469 DEFUN ("encode-coding-region", Fencode_coding_region, 3, 4, 0, /*
|
|
|
2470 Encode the text between START and END using CODING-SYSTEM.
|
|
|
2471 This will, for example, convert Japanese characters into stuff such as
|
|
|
2472 "^[$B!<!+^[(B" if you use the JIS encoding. Return length of encoded
|
|
|
2473 text. BUFFER defaults to the current buffer if unspecified.
|
|
|
2474 */
|
|
|
2475 (start, end, coding_system, buffer))
|
|
|
2476 {
|
|
|
2477 return encode_decode_coding_region (start, end, coding_system, buffer,
|
|
|
2478 CODING_ENCODE);
|
|
428
|
2479 }
|
|
|
2480
|
|
|
2481
|
|
|
2482 /************************************************************************/
|
|
771
|
2483 /* Chain methods */
|
|
428
|
2484 /************************************************************************/
|
|
|
2485
|
|
771
|
2486 /* #### Need a way to create "opposite-direction" coding systems. */
|
|
|
2487
|
|
|
2488 /* Chain two or more coding systems together to make a combination coding
|
|
|
2489 system. */
|
|
|
2490 DEFINE_CODING_SYSTEM_TYPE (chain);
|
|
|
2491
|
|
|
2492 struct chain_coding_system
|
|
|
2493 {
|
|
|
2494 /* List of coding systems, in decode order */
|
|
|
2495 Lisp_Object *chain;
|
|
|
2496 /* Number of coding systems in list */
|
|
|
2497 int count;
|
|
|
2498 /* Coding system to return as a result of canonicalize-after-coding */
|
|
|
2499 Lisp_Object canonicalize_after_coding;
|
|
|
2500 };
|
|
|
2501
|
|
|
2502 struct chain_coding_stream
|
|
|
2503 {
|
|
|
2504 int initted;
|
|
|
2505 /* Lstreams for chain coding system */
|
|
|
2506 Lisp_Object *lstreams;
|
|
|
2507 int lstream_count;
|
|
|
2508 };
|
|
|
2509
|
|
|
2510 static const struct lrecord_description lo_description_1[] = {
|
|
|
2511 { XD_LISP_OBJECT, 0 },
|
|
|
2512 { XD_END }
|
|
|
2513 };
|
|
|
2514
|
|
|
2515 static const struct struct_description lo_description = {
|
|
|
2516 sizeof (Lisp_Object),
|
|
|
2517 lo_description_1
|
|
|
2518 };
|
|
|
2519
|
|
|
2520 static const struct lrecord_description chain_coding_system_description[] = {
|
|
|
2521 { XD_INT,
|
|
|
2522 coding_system_data_offset + offsetof (struct chain_coding_system,
|
|
|
2523 count) },
|
|
|
2524 { XD_STRUCT_PTR,
|
|
|
2525 coding_system_data_offset + offsetof (struct chain_coding_system,
|
|
|
2526 chain),
|
|
|
2527 XD_INDIRECT (0, 0), &lo_description },
|
|
|
2528 { XD_LISP_OBJECT,
|
|
|
2529 coding_system_data_offset + offsetof (struct chain_coding_system,
|
|
|
2530 canonicalize_after_coding) },
|
|
|
2531 { XD_END }
|
|
|
2532 };
|
|
|
2533
|
|
|
2534 static Lisp_Object
|
|
|
2535 chain_canonicalize (Lisp_Object codesys)
|
|
|
2536 {
|
|
|
2537 /* We make use of the fact that this method is called at init time, after
|
|
|
2538 properties have been parsed. init_method is called too early. */
|
|
|
2539 /* #### It's not clear we need this whole chain-canonicalize mechanism
|
|
|
2540 any more. */
|
|
|
2541 Lisp_Object chain = Flist (XCODING_SYSTEM_CHAIN_COUNT (codesys),
|
|
|
2542 XCODING_SYSTEM_CHAIN_CHAIN (codesys));
|
|
|
2543 chain = Fcons (XCODING_SYSTEM_PRE_WRITE_CONVERSION (codesys),
|
|
|
2544 Fcons (XCODING_SYSTEM_POST_READ_CONVERSION (codesys),
|
|
|
2545 chain));
|
|
|
2546 Fputhash (chain, codesys, Vchain_canonicalize_hash_table);
|
|
|
2547 return codesys;
|
|
|
2548 }
|
|
|
2549
|
|
|
2550 static Lisp_Object
|
|
|
2551 chain_canonicalize_after_coding (struct coding_stream *str)
|
|
|
2552 {
|
|
|
2553 Lisp_Object cac =
|
|
|
2554 XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (str->codesys);
|
|
|
2555 if (!NILP (cac))
|
|
|
2556 return cac;
|
|
|
2557 return str->codesys;
|
|
|
2558 #if 0
|
|
|
2559 struct chain_coding_stream *data = CODING_STREAM_TYPE_DATA (str, chain);
|
|
|
2560 Lisp_Object us = str->codesys, codesys;
|
|
|
2561 int i;
|
|
|
2562 Lisp_Object chain;
|
|
|
2563 Lisp_Object tail;
|
|
|
2564 int changed = 0;
|
|
|
2565
|
|
|
2566 /* #### It's not clear we need this whole chain-canonicalize mechanism
|
|
|
2567 any more. */
|
|
|
2568 if (str->direction == CODING_ENCODE || !data->initted)
|
|
|
2569 return us;
|
|
|
2570
|
|
|
2571 chain = Flist (XCODING_SYSTEM_CHAIN_COUNT (us),
|
|
|
2572 XCODING_SYSTEM_CHAIN_CHAIN (us));
|
|
|
2573
|
|
|
2574 tail = chain;
|
|
|
2575 for (i = 0; i < XCODING_SYSTEM_CHAIN_COUNT (us); i++)
|
|
|
2576 {
|
|
|
2577 codesys = (coding_stream_canonicalize_after_coding
|
|
|
2578 (XLSTREAM (data->lstreams[i])));
|
|
|
2579 if (!EQ (codesys, XCAR (tail)))
|
|
|
2580 changed = 1;
|
|
|
2581 XCAR (tail) = codesys;
|
|
|
2582 tail = XCDR (tail);
|
|
|
2583 }
|
|
|
2584
|
|
|
2585 if (!changed)
|
|
|
2586 return us;
|
|
|
2587
|
|
|
2588 chain = delq_no_quit (Qnil, chain);
|
|
|
2589
|
|
|
2590 if (NILP (XCODING_SYSTEM_PRE_WRITE_CONVERSION (us)) &&
|
|
|
2591 NILP (XCODING_SYSTEM_POST_READ_CONVERSION (us)))
|
|
|
2592 {
|
|
|
2593 if (NILP (chain))
|
|
|
2594 return Qnil;
|
|
|
2595 if (NILP (XCDR (chain)))
|
|
|
2596 return XCAR (chain);
|
|
|
2597 }
|
|
|
2598
|
|
|
2599 codesys = Fgethash (Fcons (XCODING_SYSTEM_PRE_WRITE_CONVERSION (us),
|
|
|
2600 Fcons (XCODING_SYSTEM_POST_READ_CONVERSION (us),
|
|
|
2601 chain)), Vchain_canonicalize_hash_table,
|
|
|
2602 Qnil);
|
|
|
2603 if (!NILP (codesys))
|
|
|
2604 return codesys;
|
|
|
2605 return make_internal_coding_system
|
|
|
2606 (us, "internal-chain-canonicalizer-wrapper",
|
|
|
2607 Qchain, Qunbound, list2 (Qchain, chain));
|
|
|
2608 #endif /* 0 */
|
|
|
2609 }
|
|
|
2610
|
|
|
2611 static void
|
|
|
2612 chain_init (Lisp_Object codesys)
|
|
|
2613 {
|
|
|
2614 XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (codesys) = Qnil;
|
|
|
2615 }
|
|
|
2616
|
|
|
2617 static void
|
|
|
2618 chain_mark (Lisp_Object codesys)
|
|
|
2619 {
|
|
|
2620 int i;
|
|
|
2621
|
|
|
2622 for (i = 0; i < XCODING_SYSTEM_CHAIN_COUNT (codesys); i++)
|
|
|
2623 mark_object (XCODING_SYSTEM_CHAIN_CHAIN (codesys)[i]);
|
|
|
2624 mark_object (XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (codesys));
|
|
|
2625 }
|
|
|
2626
|
|
|
2627 static void
|
|
|
2628 chain_mark_coding_stream_1 (struct chain_coding_stream *data)
|
|
|
2629 {
|
|
|
2630 int i;
|
|
|
2631
|
|
|
2632 for (i = 0; i < data->lstream_count; i++)
|
|
|
2633 mark_object (data->lstreams[i]);
|
|
|
2634 }
|
|
|
2635
|
|
|
2636 static void
|
|
|
2637 chain_mark_coding_stream (struct coding_stream *str)
|
|
|
2638 {
|
|
|
2639 chain_mark_coding_stream_1 (CODING_STREAM_TYPE_DATA (str, chain));
|
|
|
2640 }
|
|
|
2641
|
|
|
2642 static void
|
|
|
2643 chain_print (Lisp_Object cs, Lisp_Object printcharfun, int escapeflag)
|
|
|
2644 {
|
|
|
2645 int i;
|
|
|
2646
|
|
|
2647 write_c_string ("(", printcharfun);
|
|
|
2648 for (i = 0; i < XCODING_SYSTEM_CHAIN_COUNT (cs); i++)
|
|
|
2649 {
|
|
|
2650 write_c_string (i == 0 ? "" : "->", printcharfun);
|
|
|
2651 print_coding_system_in_print_method (XCODING_SYSTEM_CHAIN_CHAIN (cs)[i],
|
|
|
2652 printcharfun, escapeflag);
|
|
|
2653 }
|
|
|
2654 {
|
|
|
2655 Lisp_Object cac = XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (cs);
|
|
|
2656 if (!NILP (cac))
|
|
|
2657 {
|
|
|
2658 if (i > 0)
|
|
|
2659 write_c_string (" ", printcharfun);
|
|
|
2660 write_c_string ("canonicalize-after-coding=", printcharfun);
|
|
|
2661 print_coding_system_in_print_method (cac, printcharfun, escapeflag);
|
|
|
2662 }
|
|
|
2663 }
|
|
|
2664
|
|
|
2665 write_c_string (")", printcharfun);
|
|
|
2666 }
|
|
|
2667
|
|
|
2668 static void
|
|
|
2669 chain_rewind_coding_stream_1 (struct chain_coding_stream *data)
|
|
|
2670 {
|
|
|
2671 /* Each will rewind the next; there is always at least one stream (the
|
|
|
2672 dynarr stream at the end) if we're initted */
|
|
|
2673 if (data->initted)
|
|
|
2674 Lstream_rewind (XLSTREAM (data->lstreams[0]));
|
|
|
2675 }
|
|
|
2676
|
|
|
2677 static void
|
|
|
2678 chain_rewind_coding_stream (struct coding_stream *str)
|
|
|
2679 {
|
|
|
2680 chain_rewind_coding_stream_1 (CODING_STREAM_TYPE_DATA (str, chain));
|
|
|
2681 }
|
|
|
2682
|
|
|
2683 static void
|
|
|
2684 chain_init_coding_streams_1 (struct chain_coding_stream *data,
|
|
|
2685 unsigned_char_dynarr *dst,
|
|
|
2686 int ncodesys, Lisp_Object *codesys,
|
|
|
2687 enum encode_decode direction)
|
|
|
2688 {
|
|
|
2689 int i;
|
|
|
2690 Lisp_Object lstream_out;
|
|
|
2691
|
|
|
2692 data->lstream_count = ncodesys + 1;
|
|
|
2693 data->lstreams = xnew_array (Lisp_Object, data->lstream_count);
|
|
|
2694
|
|
|
2695 lstream_out = make_dynarr_output_stream (dst);
|
|
|
2696 Lstream_set_buffering (XLSTREAM (lstream_out), LSTREAM_UNBUFFERED, 0);
|
|
|
2697 data->lstreams[data->lstream_count - 1] = lstream_out;
|
|
|
2698
|
|
|
2699 for (i = ncodesys - 1; i >= 0; i--)
|
|
|
2700 {
|
|
|
2701 data->lstreams[i] =
|
|
|
2702 make_coding_output_stream
|
|
|
2703 (XLSTREAM (lstream_out),
|
|
|
2704 codesys[direction == CODING_ENCODE ? ncodesys - (i + 1) : i],
|
|
800
|
2705 direction, 0);
|
|
771
|
2706 lstream_out = data->lstreams[i];
|
|
|
2707 Lstream_set_buffering (XLSTREAM (lstream_out), LSTREAM_UNBUFFERED,
|
|
|
2708 0);
|
|
|
2709 }
|
|
|
2710 data->initted = 1;
|
|
|
2711 }
|
|
|
2712
|
|
|
2713 static Bytecount
|
|
|
2714 chain_convert (struct coding_stream *str, const UExtbyte *src,
|
|
|
2715 unsigned_char_dynarr *dst, Bytecount n)
|
|
|
2716 {
|
|
|
2717 struct chain_coding_stream *data = CODING_STREAM_TYPE_DATA (str, chain);
|
|
|
2718
|
|
|
2719 if (str->eof)
|
|
|
2720 {
|
|
|
2721 /* Each will close the next; there is always at least one stream (the
|
|
|
2722 dynarr stream at the end) if we're initted. We need to close now
|
|
|
2723 because more data may be generated. */
|
|
|
2724 if (data->initted)
|
|
|
2725 Lstream_close (XLSTREAM (data->lstreams[0]));
|
|
|
2726 return n;
|
|
|
2727 }
|
|
|
2728
|
|
|
2729 if (!data->initted)
|
|
|
2730 chain_init_coding_streams_1
|
|
|
2731 (data, dst, XCODING_SYSTEM_CHAIN_COUNT (str->codesys),
|
|
|
2732 XCODING_SYSTEM_CHAIN_CHAIN (str->codesys), str->direction);
|
|
|
2733
|
|
|
2734 if (Lstream_write (XLSTREAM (data->lstreams[0]), src, n) < 0)
|
|
|
2735 return -1;
|
|
|
2736 return n;
|
|
|
2737 }
|
|
|
2738
|
|
|
2739 static void
|
|
|
2740 chain_finalize_coding_stream_1 (struct chain_coding_stream *data)
|
|
|
2741 {
|
|
|
2742 if (data->lstreams)
|
|
|
2743 {
|
|
|
2744 /* Order of deletion is important here! Delete from the head of the
|
|
|
2745 chain and work your way towards the tail. In general, when you
|
|
|
2746 delete an object, there should be *NO* pointers to it anywhere.
|
|
|
2747 Deleting back-to-front would be a problem because there are
|
|
|
2748 pointers going forward. If there were pointers in both
|
|
|
2749 directions, you'd have to disconnect the pointers to a particular
|
|
|
2750 object before deleting it. */
|
|
|
2751 if (!gc_in_progress)
|
|
|
2752 {
|
|
|
2753 int i;
|
|
|
2754 /* During GC, these objects are unmarked, and are about to be
|
|
|
2755 freed. We do NOT want them on the free list, and that will
|
|
|
2756 cause lots of nastiness including crashes. Just let them be
|
|
|
2757 freed normally. */
|
|
|
2758 for (i = 0; i < data->lstream_count; i++)
|
|
|
2759 Lstream_delete (XLSTREAM ((data->lstreams)[i]));
|
|
|
2760 }
|
|
|
2761 xfree (data->lstreams);
|
|
|
2762 }
|
|
|
2763 }
|
|
|
2764
|
|
|
2765 static void
|
|
|
2766 chain_finalize_coding_stream (struct coding_stream *str)
|
|
|
2767 {
|
|
|
2768 chain_finalize_coding_stream_1 (CODING_STREAM_TYPE_DATA (str, chain));
|
|
|
2769 }
|
|
|
2770
|
|
|
2771 static void
|
|
|
2772 chain_finalize (Lisp_Object c)
|
|
|
2773 {
|
|
|
2774 if (XCODING_SYSTEM_CHAIN_CHAIN (c))
|
|
|
2775 xfree (XCODING_SYSTEM_CHAIN_CHAIN (c));
|
|
|
2776 }
|
|
|
2777
|
|
428
|
2778 static int
|
|
771
|
2779 chain_putprop (Lisp_Object codesys, Lisp_Object key, Lisp_Object value)
|
|
|
2780 {
|
|
|
2781 if (EQ (key, Qchain))
|
|
|
2782 {
|
|
|
2783 Lisp_Object tail;
|
|
|
2784 Lisp_Object *cslist;
|
|
|
2785 int count = 0;
|
|
|
2786 int i;
|
|
|
2787
|
|
|
2788 EXTERNAL_LIST_LOOP (tail, value)
|
|
|
2789 {
|
|
|
2790 Fget_coding_system (XCAR (tail));
|
|
|
2791 count++;
|
|
|
2792 }
|
|
|
2793
|
|
|
2794 cslist = xnew_array (Lisp_Object, count);
|
|
|
2795 XCODING_SYSTEM_CHAIN_CHAIN (codesys) = cslist;
|
|
|
2796
|
|
|
2797 count = 0;
|
|
|
2798 EXTERNAL_LIST_LOOP (tail, value)
|
|
|
2799 {
|
|
|
2800 cslist[count] = Fget_coding_system (XCAR (tail));
|
|
|
2801 count++;
|
|
|
2802 }
|
|
|
2803
|
|
|
2804 XCODING_SYSTEM_CHAIN_COUNT (codesys) = count;
|
|
|
2805
|
|
|
2806 for (i = 0; i < count - 1; i++)
|
|
|
2807 {
|
|
|
2808 if (decoding_source_sink_type_is_char (cslist[i], CODING_SINK) !=
|
|
|
2809 decoding_source_sink_type_is_char (cslist[i + 1], CODING_SOURCE))
|
|
|
2810 invalid_argument_2 ("Sink of first must match source of second",
|
|
|
2811 cslist[i], cslist[i + 1]);
|
|
|
2812 }
|
|
|
2813 }
|
|
|
2814 else if (EQ (key, Qcanonicalize_after_coding))
|
|
|
2815 XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (codesys) =
|
|
|
2816 Fget_coding_system (value);
|
|
|
2817 else
|
|
|
2818 return 0;
|
|
|
2819 return 1;
|
|
|
2820 }
|
|
|
2821
|
|
|
2822 static Lisp_Object
|
|
|
2823 chain_getprop (Lisp_Object coding_system, Lisp_Object prop)
|
|
|
2824 {
|
|
|
2825 if (EQ (prop, Qchain))
|
|
|
2826 {
|
|
|
2827 Lisp_Object result = Qnil;
|
|
|
2828 int i;
|
|
|
2829
|
|
|
2830 for (i = 0; i < XCODING_SYSTEM_CHAIN_COUNT (coding_system); i++)
|
|
|
2831 result = Fcons (XCODING_SYSTEM_CHAIN_CHAIN (coding_system)[i],
|
|
|
2832 result);
|
|
|
2833
|
|
|
2834 return Fnreverse (result);
|
|
|
2835 }
|
|
|
2836 else if (EQ (prop, Qcanonicalize_after_coding))
|
|
|
2837 return XCODING_SYSTEM_CHAIN_CANONICALIZE_AFTER_CODING (coding_system);
|
|
|
2838 else
|
|
|
2839 return Qunbound;
|
|
|
2840 }
|
|
|
2841
|
|
|
2842 static enum source_sink_type
|
|
|
2843 chain_conversion_end_type (Lisp_Object codesys)
|
|
|
2844 {
|
|
|
2845 Lisp_Object *cslist = XCODING_SYSTEM_CHAIN_CHAIN (codesys);
|
|
|
2846 int n = XCODING_SYSTEM_CHAIN_COUNT (codesys);
|
|
|
2847 int charp_source, charp_sink;
|
|
|
2848
|
|
|
2849 if (n == 0)
|
|
|
2850 return DECODES_BYTE_TO_BYTE; /* arbitrary */
|
|
|
2851 charp_source = decoding_source_sink_type_is_char (cslist[0], CODING_SOURCE);
|
|
|
2852 charp_sink = decoding_source_sink_type_is_char (cslist[n - 1], CODING_SINK);
|
|
|
2853
|
|
|
2854 switch (charp_source * 2 + charp_sink)
|
|
|
2855 {
|
|
|
2856 case 0: return DECODES_BYTE_TO_BYTE;
|
|
|
2857 case 1: return DECODES_BYTE_TO_CHARACTER;
|
|
|
2858 case 2: return DECODES_CHARACTER_TO_BYTE;
|
|
|
2859 case 3: return DECODES_CHARACTER_TO_CHARACTER;
|
|
|
2860 }
|
|
|
2861
|
|
|
2862 abort ();
|
|
|
2863 return DECODES_BYTE_TO_BYTE;
|
|
|
2864 }
|
|
|
2865
|
|
|
2866
|
|
|
2867 /************************************************************************/
|
|
|
2868 /* No-conversion methods */
|
|
|
2869 /************************************************************************/
|
|
|
2870
|
|
|
2871 /* "No conversion"; used for binary files. We use quotes because there
|
|
|
2872 really is some conversion being applied (it does byte<->char
|
|
|
2873 conversion), but it appears to the user as if the text is read in
|
|
|
2874 without conversion. */
|
|
|
2875 DEFINE_CODING_SYSTEM_TYPE (no_conversion);
|
|
|
2876
|
|
|
2877 /* This is used when reading in "binary" files -- i.e. files that may
|
|
|
2878 contain all 256 possible byte values and that are not to be
|
|
|
2879 interpreted as being in any particular encoding. */
|
|
|
2880 static Bytecount
|
|
|
2881 no_conversion_convert (struct coding_stream *str,
|
|
|
2882 const UExtbyte *src,
|
|
|
2883 unsigned_char_dynarr *dst, Bytecount n)
|
|
|
2884 {
|
|
|
2885 UExtbyte c;
|
|
|
2886 unsigned int ch = str->ch;
|
|
|
2887 Bytecount orign = n;
|
|
|
2888
|
|
|
2889 if (str->direction == CODING_DECODE)
|
|
|
2890 {
|
|
|
2891 while (n--)
|
|
|
2892 {
|
|
|
2893 c = *src++;
|
|
|
2894
|
|
|
2895 DECODE_ADD_BINARY_CHAR (c, dst);
|
|
|
2896 }
|
|
|
2897
|
|
|
2898 if (str->eof)
|
|
|
2899 DECODE_OUTPUT_PARTIAL_CHAR (ch, dst);
|
|
|
2900 }
|
|
|
2901 else
|
|
|
2902 {
|
|
|
2903
|
|
|
2904 while (n--)
|
|
|
2905 {
|
|
|
2906 c = *src++;
|
|
|
2907 if (BYTE_ASCII_P (c))
|
|
|
2908 {
|
|
|
2909 assert (ch == 0);
|
|
|
2910 Dynarr_add (dst, c);
|
|
|
2911 }
|
|
|
2912 #ifdef MULE
|
|
|
2913 else if (INTBYTE_LEADING_BYTE_P (c))
|
|
|
2914 {
|
|
|
2915 assert (ch == 0);
|
|
|
2916 if (c == LEADING_BYTE_LATIN_ISO8859_1 ||
|
|
|
2917 c == LEADING_BYTE_CONTROL_1)
|
|
|
2918 ch = c;
|
|
|
2919 else
|
|
|
2920 Dynarr_add (dst, '~'); /* untranslatable character */
|
|
|
2921 }
|
|
|
2922 else
|
|
|
2923 {
|
|
|
2924 if (ch == LEADING_BYTE_LATIN_ISO8859_1)
|
|
|
2925 Dynarr_add (dst, c);
|
|
|
2926 else if (ch == LEADING_BYTE_CONTROL_1)
|
|
|
2927 {
|
|
|
2928 assert (c < 0xC0);
|
|
|
2929 Dynarr_add (dst, c - 0x20);
|
|
|
2930 }
|
|
|
2931 /* else it should be the second or third byte of an
|
|
|
2932 untranslatable character, so ignore it */
|
|
|
2933 ch = 0;
|
|
|
2934 }
|
|
|
2935 #endif /* MULE */
|
|
|
2936
|
|
|
2937 }
|
|
|
2938 }
|
|
|
2939
|
|
|
2940 str->ch = ch;
|
|
|
2941 return orign;
|
|
|
2942 }
|
|
|
2943
|
|
|
2944 DEFINE_DETECTOR (no_conversion);
|
|
|
2945 DEFINE_DETECTOR_CATEGORY (no_conversion, no_conversion);
|
|
|
2946
|
|
|
2947 struct no_conversion_detector
|
|
|
2948 {
|
|
|
2949 int dummy;
|
|
|
2950 };
|
|
|
2951
|
|
|
2952 static void
|
|
|
2953 no_conversion_detect (struct detection_state *st, const UExtbyte *src,
|
|
|
2954 Bytecount n)
|
|
|
2955 {
|
|
|
2956 /* Hack until we get better handling of this stuff! */
|
|
|
2957 DET_RESULT (st, no_conversion) = DET_SLIGHTLY_LIKELY;
|
|
|
2958 }
|
|
|
2959
|
|
|
2960
|
|
|
2961 /************************************************************************/
|
|
|
2962 /* Convert-eol methods */
|
|
|
2963 /************************************************************************/
|
|
|
2964
|
|
|
2965 /* This is used to handle end-of-line (EOL) differences. It is
|
|
|
2966 character-to-character, and works (when encoding) *BEFORE* sending
|
|
|
2967 data to the main encoding routine -- thus, that routine must handle
|
|
|
2968 different EOL types itself if it does line-oriented type processing.
|
|
|
2969 This is unavoidable because we don't know whether the output of the
|
|
|
2970 main encoding routine is ASCII compatible (Unicode is definitely not,
|
|
|
2971 for example).
|
|
|
2972
|
|
793
|
2973 There is one parameter: `subtype', either `cr', `lf', `crlf', or nil.
|
|
771
|
2974 */
|
|
|
2975
|
|
|
2976 DEFINE_CODING_SYSTEM_TYPE (convert_eol);
|
|
|
2977
|
|
|
2978 struct convert_eol_coding_system
|
|
|
2979 {
|
|
|
2980 enum eol_type subtype;
|
|
|
2981 };
|
|
|
2982
|
|
|
2983 #define CODING_SYSTEM_CONVERT_EOL_SUBTYPE(codesys) \
|
|
|
2984 (CODING_SYSTEM_TYPE_DATA (codesys, convert_eol)->subtype)
|
|
|
2985 #define XCODING_SYSTEM_CONVERT_EOL_SUBTYPE(codesys) \
|
|
|
2986 (XCODING_SYSTEM_TYPE_DATA (codesys, convert_eol)->subtype)
|
|
|
2987
|
|
|
2988 struct convert_eol_coding_stream
|
|
|
2989 {
|
|
|
2990 enum eol_type actual;
|
|
|
2991 };
|
|
|
2992
|
|
|
2993 static const struct lrecord_description
|
|
|
2994 convert_eol_coding_system_description[] = {
|
|
|
2995 { XD_END }
|
|
|
2996 };
|
|
|
2997
|
|
|
2998 static void
|
|
|
2999 convert_eol_print (Lisp_Object cs, Lisp_Object printcharfun, int escapeflag)
|
|
|
3000 {
|
|
|
3001 struct convert_eol_coding_system *data =
|
|
|
3002 XCODING_SYSTEM_TYPE_DATA (cs, convert_eol);
|
|
|
3003
|
|
|
3004 write_fmt_string (printcharfun, "(%s)",
|
|
|
3005 data->subtype == EOL_LF ? "lf" :
|
|
|
3006 data->subtype == EOL_CRLF ? "crlf" :
|
|
|
3007 data->subtype == EOL_CR ? "cr" :
|
|
793
|
3008 data->subtype == EOL_AUTODETECT ? "nil" :
|
|
771
|
3009 (abort(), ""));
|
|
|
3010 }
|
|
|
3011
|
|
|
3012 static enum source_sink_type
|
|
|
3013 convert_eol_conversion_end_type (Lisp_Object codesys)
|
|
|
3014 {
|
|
|
3015 return DECODES_CHARACTER_TO_CHARACTER;
|
|
|
3016 }
|
|
|
3017
|
|
|
3018 static int
|
|
|
3019 convert_eol_putprop (Lisp_Object codesys,
|
|
|
3020 Lisp_Object key,
|
|
|
3021 Lisp_Object value)
|
|
|
3022 {
|
|
|
3023 struct convert_eol_coding_system *data =
|
|
|
3024 XCODING_SYSTEM_TYPE_DATA (codesys, convert_eol);
|
|
|
3025
|
|
|
3026 if (EQ (key, Qsubtype))
|
|
|
3027 {
|
|
|
3028 if (EQ (value, Qlf) /* || EQ (value, Qunix) */)
|
|
|
3029 data->subtype = EOL_LF;
|
|
|
3030 else if (EQ (value, Qcrlf) /* || EQ (value, Qdos) */)
|
|
|
3031 data->subtype = EOL_CRLF;
|
|
|
3032 else if (EQ (value, Qcr) /* || EQ (value, Qmac) */)
|
|
|
3033 data->subtype = EOL_CR;
|
|
793
|
3034 else if (EQ (value, Qnil))
|
|
771
|
3035 data->subtype = EOL_AUTODETECT;
|
|
|
3036 else invalid_constant ("Unrecognized eol type", value);
|
|
|
3037 }
|
|
|
3038 else
|
|
|
3039 return 0;
|
|
|
3040 return 1;
|
|
|
3041 }
|
|
|
3042
|
|
|
3043 static Lisp_Object
|
|
|
3044 convert_eol_getprop (Lisp_Object coding_system, Lisp_Object prop)
|
|
|
3045 {
|
|
|
3046 struct convert_eol_coding_system *data =
|
|
|
3047 XCODING_SYSTEM_TYPE_DATA (coding_system, convert_eol);
|
|
|
3048
|
|
|
3049 if (EQ (prop, Qsubtype))
|
|
|
3050 {
|
|
|
3051 switch (data->subtype)
|
|
|
3052 {
|
|
|
3053 case EOL_LF: return Qlf;
|
|
|
3054 case EOL_CRLF: return Qcrlf;
|
|
|
3055 case EOL_CR: return Qcr;
|
|
793
|
3056 case EOL_AUTODETECT: return Qnil;
|
|
771
|
3057 default: abort ();
|
|
|
3058 }
|
|
|
3059 }
|
|
|
3060
|
|
|
3061 return Qunbound;
|
|
|
3062 }
|
|
|
3063
|
|
|
3064 static void
|
|
|
3065 convert_eol_init_coding_stream (struct coding_stream *str)
|
|
|
3066 {
|
|
|
3067 struct convert_eol_coding_stream *data =
|
|
|
3068 CODING_STREAM_TYPE_DATA (str, convert_eol);
|
|
|
3069 data->actual = XCODING_SYSTEM_CONVERT_EOL_SUBTYPE (str->codesys);
|
|
|
3070 }
|
|
|
3071
|
|
|
3072 static Bytecount
|
|
|
3073 convert_eol_convert (struct coding_stream *str, const Intbyte *src,
|
|
|
3074 unsigned_char_dynarr *dst, Bytecount n)
|
|
|
3075 {
|
|
|
3076 if (str->direction == CODING_DECODE)
|
|
|
3077 {
|
|
|
3078 struct convert_eol_coding_stream *data =
|
|
|
3079 CODING_STREAM_TYPE_DATA (str, convert_eol);
|
|
|
3080
|
|
|
3081 if (data->actual == EOL_AUTODETECT)
|
|
|
3082 {
|
|
|
3083 Bytecount n2 = n;
|
|
|
3084 const Intbyte *src2 = src;
|
|
|
3085
|
|
|
3086 for (; n2; n2--)
|
|
|
3087 {
|
|
|
3088 Intbyte c = *src2++;
|
|
|
3089 if (c == '\n')
|
|
|
3090 {
|
|
|
3091 data->actual = EOL_LF;
|
|
|
3092 break;
|
|
|
3093 }
|
|
|
3094 else if (c == '\r')
|
|
|
3095 {
|
|
|
3096 if (n2 == 1)
|
|
|
3097 {
|
|
|
3098 /* If we're seeing a '\r' at the end of the data, then
|
|
|
3099 reject the '\r' right now so it doesn't become an
|
|
|
3100 issue in the code below -- unless we're at the end of
|
|
|
3101 the stream, in which case we can't do that (because
|
|
|
3102 then the '\r' will never get written out), and in any
|
|
|
3103 case we should be recognizing it at EOL_CR format. */
|
|
|
3104 if (str->eof)
|
|
|
3105 data->actual = EOL_CR;
|
|
|
3106 else
|
|
|
3107 n--;
|
|
|
3108 break;
|
|
|
3109 }
|
|
|
3110 else if (*src2 == '\n')
|
|
|
3111 data->actual = EOL_CRLF;
|
|
|
3112 else
|
|
|
3113 data->actual = EOL_CR;
|
|
|
3114 break;
|
|
|
3115 }
|
|
|
3116 }
|
|
|
3117 }
|
|
|
3118
|
|
|
3119 /* str->eof is set, the caller reached EOF on the other end and has
|
|
|
3120 no new data to give us. The only data we get is the data we
|
|
|
3121 rejected from last time. */
|
|
|
3122 if (data->actual == EOL_LF || data->actual == EOL_AUTODETECT ||
|
|
|
3123 (str->eof))
|
|
|
3124 Dynarr_add_many (dst, src, n);
|
|
|
3125 else
|
|
|
3126 {
|
|
|
3127 const Intbyte *end = src + n;
|
|
|
3128 while (1)
|
|
|
3129 {
|
|
|
3130 /* Find the next section with no \r and add it. */
|
|
|
3131 const Intbyte *runstart = src;
|
|
|
3132 src = (Intbyte *) memchr (src, '\r', end - src);
|
|
|
3133 if (!src)
|
|
|
3134 src = end;
|
|
|
3135 Dynarr_add_many (dst, runstart, src - runstart);
|
|
|
3136 /* Stop if at end ... */
|
|
|
3137 if (src == end)
|
|
|
3138 break;
|
|
|
3139 /* ... else, translate as necessary. */
|
|
|
3140 src++;
|
|
|
3141 if (data->actual == EOL_CR)
|
|
|
3142 Dynarr_add (dst, '\n');
|
|
|
3143 /* We need to be careful here with CRLF. If we see a CR at the
|
|
|
3144 end of the data, we don't know if it's part of a CRLF, so we
|
|
|
3145 reject it. Otherwise: If it's part of a CRLF, eat it and
|
|
|
3146 loop; the following LF gets added next time around. If it's
|
|
|
3147 not part of a CRLF, add the CR and loop. The following
|
|
|
3148 character will be processed in the next loop iteration. This
|
|
|
3149 correctly handles a sequence like CR+CR+LF. */
|
|
|
3150 else if (src == end)
|
|
|
3151 return n - 1; /* reject the CR at the end; we'll get it again
|
|
|
3152 next time the convert method is called */
|
|
|
3153 else if (*src != '\n')
|
|
|
3154 Dynarr_add (dst, '\r');
|
|
|
3155 }
|
|
|
3156 }
|
|
|
3157
|
|
|
3158 return n;
|
|
|
3159 }
|
|
|
3160 else
|
|
|
3161 {
|
|
|
3162 enum eol_type subtype =
|
|
|
3163 XCODING_SYSTEM_CONVERT_EOL_SUBTYPE (str->codesys);
|
|
|
3164 const Intbyte *end = src + n;
|
|
|
3165
|
|
|
3166 /* We try to be relatively efficient here. */
|
|
|
3167 if (subtype == EOL_LF)
|
|
|
3168 Dynarr_add_many (dst, src, n);
|
|
|
3169 else
|
|
|
3170 {
|
|
|
3171 while (1)
|
|
|
3172 {
|
|
|
3173 /* Find the next section with no \n and add it. */
|
|
|
3174 const Intbyte *runstart = src;
|
|
|
3175 src = (Intbyte *) memchr (src, '\n', end - src);
|
|
|
3176 if (!src)
|
|
|
3177 src = end;
|
|
|
3178 Dynarr_add_many (dst, runstart, src - runstart);
|
|
|
3179 /* Stop if at end ... */
|
|
|
3180 if (src == end)
|
|
|
3181 break;
|
|
|
3182 /* ... else, skip over \n and add its translation. */
|
|
|
3183 src++;
|
|
|
3184 Dynarr_add (dst, '\r');
|
|
|
3185 if (subtype == EOL_CRLF)
|
|
|
3186 Dynarr_add (dst, '\n');
|
|
|
3187 }
|
|
|
3188 }
|
|
|
3189
|
|
|
3190 return n;
|
|
|
3191 }
|
|
|
3192 }
|
|
|
3193
|
|
|
3194 static Lisp_Object
|
|
|
3195 convert_eol_canonicalize_after_coding (struct coding_stream *str)
|
|
|
3196 {
|
|
|
3197 struct convert_eol_coding_stream *data =
|
|
|
3198 CODING_STREAM_TYPE_DATA (str, convert_eol);
|
|
|
3199
|
|
|
3200 if (str->direction == CODING_ENCODE)
|
|
|
3201 return str->codesys;
|
|
|
3202
|
|
|
3203 switch (data->actual)
|
|
|
3204 {
|
|
|
3205 case EOL_LF: return Fget_coding_system (Qconvert_eol_lf);
|
|
|
3206 case EOL_CRLF: return Fget_coding_system (Qconvert_eol_crlf);
|
|
|
3207 case EOL_CR: return Fget_coding_system (Qconvert_eol_cr);
|
|
|
3208 case EOL_AUTODETECT: return str->codesys;
|
|
|
3209 default: abort (); return Qnil;
|
|
|
3210 }
|
|
|
3211 }
|
|
|
3212
|
|
|
3213
|
|
|
3214 /************************************************************************/
|
|
|
3215 /* Undecided methods */
|
|
|
3216 /************************************************************************/
|
|
|
3217
|
|
|
3218 /* Do autodetection. We can autodetect the EOL type only, the coding
|
|
|
3219 system only, or both. We only do autodetection when decoding; when
|
|
|
3220 encoding, we just pass the data through.
|
|
|
3221
|
|
|
3222 When doing just EOL detection, a coding system can be specified; if so,
|
|
|
3223 we will decode this data through the coding system before doing EOL
|
|
|
3224 detection. The reason for specifying this is so that
|
|
|
3225 canonicalize-after-coding works: We will canonicalize the specified
|
|
|
3226 coding system into the appropriate EOL type. When doing both coding and
|
|
|
3227 EOL detection, we do similar canonicalization, and also catch situations
|
|
|
3228 where the EOL type is overspecified, i.e. the detected coding system
|
|
|
3229 specifies an EOL type, and either switch to the equivalent
|
|
|
3230 non-EOL-processing coding system (if possible), or terminate EOL
|
|
|
3231 detection and use the specified EOL type. This prevents data from being
|
|
|
3232 EOL-processed twice.
|
|
|
3233 */
|
|
|
3234
|
|
|
3235 DEFINE_CODING_SYSTEM_TYPE (undecided);
|
|
|
3236
|
|
|
3237 struct undecided_coding_system
|
|
|
3238 {
|
|
|
3239 int do_eol, do_coding;
|
|
|
3240 Lisp_Object cs;
|
|
|
3241 };
|
|
|
3242
|
|
|
3243 struct undecided_coding_stream
|
|
|
3244 {
|
|
|
3245 Lisp_Object actual;
|
|
|
3246 /* Either 2 or 3 lstreams here; see undecided_convert */
|
|
|
3247 struct chain_coding_stream c;
|
|
|
3248
|
|
|
3249 struct detection_state *st;
|
|
|
3250 };
|
|
|
3251
|
|
|
3252 static const struct lrecord_description
|
|
|
3253 undecided_coding_system_description[] = {
|
|
|
3254 { XD_LISP_OBJECT,
|
|
|
3255 coding_system_data_offset + offsetof (struct undecided_coding_system,
|
|
|
3256 cs) },
|
|
|
3257 { XD_END }
|
|
|
3258 };
|
|
|
3259
|
|
|
3260 static void
|
|
|
3261 undecided_init (Lisp_Object codesys)
|
|
|
3262 {
|
|
|
3263 struct undecided_coding_system *data =
|
|
|
3264 XCODING_SYSTEM_TYPE_DATA (codesys, undecided);
|
|
|
3265
|
|
|
3266 data->cs = Qnil;
|
|
|
3267 }
|
|
|
3268
|
|
|
3269 static void
|
|
|
3270 undecided_mark (Lisp_Object codesys)
|
|
|
3271 {
|
|
|
3272 struct undecided_coding_system *data =
|
|
|
3273 XCODING_SYSTEM_TYPE_DATA (codesys, undecided);
|
|
|
3274
|
|
|
3275 mark_object (data->cs);
|
|
|
3276 }
|
|
|
3277
|
|
|
3278 static void
|
|
|
3279 undecided_print (Lisp_Object cs, Lisp_Object printcharfun, int escapeflag)
|
|
|
3280 {
|
|
|
3281 struct undecided_coding_system *data =
|
|
|
3282 XCODING_SYSTEM_TYPE_DATA (cs, undecided);
|
|
|
3283 int need_space = 0;
|
|
|
3284
|
|
|
3285 write_c_string ("(", printcharfun);
|
|
|
3286 if (data->do_eol)
|
|
|
3287 {
|
|
|
3288 write_c_string ("do-eol", printcharfun);
|
|
|
3289 need_space = 1;
|
|
|
3290 }
|
|
|
3291 if (data->do_coding)
|
|
|
3292 {
|
|
|
3293 if (need_space)
|
|
|
3294 write_c_string (" ", printcharfun);
|
|
|
3295 write_c_string ("do-coding", printcharfun);
|
|
|
3296 need_space = 1;
|
|
|
3297 }
|
|
|
3298 if (!NILP (data->cs))
|
|
|
3299 {
|
|
|
3300 if (need_space)
|
|
|
3301 write_c_string (" ", printcharfun);
|
|
|
3302 write_c_string ("coding-system=", printcharfun);
|
|
|
3303 print_coding_system_in_print_method (data->cs, printcharfun, escapeflag);
|
|
|
3304 }
|
|
|
3305 write_c_string (")", printcharfun);
|
|
|
3306 }
|
|
|
3307
|
|
|
3308 static void
|
|
|
3309 undecided_mark_coding_stream (struct coding_stream *str)
|
|
|
3310 {
|
|
|
3311 chain_mark_coding_stream_1 (&CODING_STREAM_TYPE_DATA (str, undecided)->c);
|
|
|
3312 }
|
|
|
3313
|
|
|
3314 static int
|
|
|
3315 undecided_putprop (Lisp_Object codesys, Lisp_Object key, Lisp_Object value)
|
|
|
3316 {
|
|
|
3317 struct undecided_coding_system *data =
|
|
|
3318 XCODING_SYSTEM_TYPE_DATA (codesys, undecided);
|
|
|
3319
|
|
|
3320 if (EQ (key, Qdo_eol))
|
|
|
3321 data->do_eol = 1;
|
|
|
3322 else if (EQ (key, Qdo_coding))
|
|
|
3323 data->do_coding = 1;
|
|
|
3324 else if (EQ (key, Qcoding_system))
|
|
|
3325 data->cs = get_coding_system_for_text_file (value, 0);
|
|
|
3326 else
|
|
|
3327 return 0;
|
|
|
3328 return 1;
|
|
|
3329 }
|
|
|
3330
|
|
|
3331 static Lisp_Object
|
|
|
3332 undecided_getprop (Lisp_Object codesys, Lisp_Object prop)
|
|
|
3333 {
|
|
|
3334 struct undecided_coding_system *data =
|
|
|
3335 XCODING_SYSTEM_TYPE_DATA (codesys, undecided);
|
|
|
3336
|
|
|
3337 if (EQ (prop, Qdo_eol))
|
|
|
3338 return data->do_eol ? Qt : Qnil;
|
|
|
3339 if (EQ (prop, Qdo_coding))
|
|
|
3340 return data->do_coding ? Qt : Qnil;
|
|
|
3341 if (EQ (prop, Qcoding_system))
|
|
|
3342 return data->cs;
|
|
|
3343 return Qunbound;
|
|
|
3344 }
|
|
|
3345
|
|
|
3346 static struct detection_state *
|
|
|
3347 allocate_detection_state (void)
|
|
|
3348 {
|
|
|
3349 int i;
|
|
|
3350 Bytecount size = MAX_ALIGN_SIZE (sizeof (struct detection_state));
|
|
|
3351 struct detection_state *block;
|
|
|
3352
|
|
|
3353 for (i = 0; i < coding_detector_count; i++)
|
|
|
3354 size += MAX_ALIGN_SIZE (Dynarr_at (all_coding_detectors, i).data_size);
|
|
|
3355
|
|
|
3356 block = (struct detection_state *) xmalloc_and_zero (size);
|
|
|
3357
|
|
|
3358 size = MAX_ALIGN_SIZE (sizeof (struct detection_state));
|
|
|
3359 for (i = 0; i < coding_detector_count; i++)
|
|
|
3360 {
|
|
|
3361 block->data_offset[i] = size;
|
|
|
3362 size += MAX_ALIGN_SIZE (Dynarr_at (all_coding_detectors, i).data_size);
|
|
|
3363 }
|
|
|
3364
|
|
|
3365 return block;
|
|
|
3366 }
|
|
|
3367
|
|
|
3368 static void
|
|
|
3369 free_detection_state (struct detection_state *st)
|
|
|
3370 {
|
|
|
3371 int i;
|
|
|
3372
|
|
|
3373 for (i = 0; i < coding_detector_count; i++)
|
|
|
3374 {
|
|
|
3375 if (Dynarr_at (all_coding_detectors, i).finalize_detection_state_method)
|
|
|
3376 Dynarr_at (all_coding_detectors, i).finalize_detection_state_method
|
|
|
3377 (st);
|
|
|
3378 }
|
|
|
3379
|
|
|
3380 xfree (st);
|
|
|
3381 }
|
|
|
3382
|
|
|
3383 static int
|
|
|
3384 coding_category_symbol_to_id (Lisp_Object symbol)
|
|
428
|
3385 {
|
|
|
3386 int i;
|
|
|
3387
|
|
|
3388 CHECK_SYMBOL (symbol);
|
|
771
|
3389 for (i = 0; i < coding_detector_count; i++)
|
|
|
3390 {
|
|
|
3391 detector_category_dynarr *cats =
|
|
|
3392 Dynarr_at (all_coding_detectors, i).cats;
|
|
|
3393 int j;
|
|
|
3394
|
|
|
3395 for (j = 0; j < Dynarr_length (cats); j++)
|
|
|
3396 if (EQ (Dynarr_at (cats, j).sym, symbol))
|
|
|
3397 return Dynarr_at (cats, j).id;
|
|
|
3398 }
|
|
|
3399
|
|
563
|
3400 invalid_constant ("Unrecognized coding category", symbol);
|
|
801
|
3401 RETURN_NOT_REACHED (0)
|
|
428
|
3402 }
|
|
|
3403
|
|
771
|
3404 static Lisp_Object
|
|
|
3405 coding_category_id_to_symbol (int id)
|
|
428
|
3406 {
|
|
|
3407 int i;
|
|
771
|
3408
|
|
|
3409 for (i = 0; i < coding_detector_count; i++)
|
|
|
3410 {
|
|
|
3411 detector_category_dynarr *cats =
|
|
|
3412 Dynarr_at (all_coding_detectors, i).cats;
|
|
|
3413 int j;
|
|
|
3414
|
|
|
3415 for (j = 0; j < Dynarr_length (cats); j++)
|
|
|
3416 if (id == Dynarr_at (cats, j).id)
|
|
|
3417 return Dynarr_at (cats, j).sym;
|
|
|
3418 }
|
|
|
3419
|
|
|
3420 abort ();
|
|
|
3421 return Qnil; /* (usually) not reached */
|
|
428
|
3422 }
|
|
|
3423
|
|
771
|
3424 static Lisp_Object
|
|
|
3425 detection_result_number_to_symbol (enum detection_result result)
|
|
428
|
3426 {
|
|
771
|
3427 #define FROB(sym, num) if (result == num) return (sym)
|
|
|
3428 FROB (Qnear_certainty, DET_NEAR_CERTAINTY);
|
|
|
3429 FROB (Qquite_probable, DET_QUITE_PROBABLE);
|
|
|
3430 FROB (Qsomewhat_likely, DET_SOMEWHAT_LIKELY);
|
|
|
3431 FROB (Qas_likely_as_unlikely, DET_AS_LIKELY_AS_UNLIKELY);
|
|
|
3432 FROB (Qsomewhat_unlikely, DET_SOMEWHAT_UNLIKELY);
|
|
|
3433 FROB (Qquite_improbable, DET_QUITE_IMPROBABLE);
|
|
|
3434 FROB (Qnearly_impossible, DET_NEARLY_IMPOSSIBLE);
|
|
|
3435 #undef FROB
|
|
|
3436
|
|
|
3437 abort ();
|
|
|
3438 return Qnil; /* (usually) not reached */
|
|
|
3439 }
|
|
|
3440
|
|
778
|
3441 #if 0 /* not used */
|
|
771
|
3442 static enum detection_result
|
|
|
3443 detection_result_symbol_to_number (Lisp_Object symbol)
|
|
|
3444 {
|
|
|
3445 #define FROB(sym, num) if (EQ (symbol, sym)) return (num)
|
|
|
3446 FROB (Qnear_certainty, DET_NEAR_CERTAINTY);
|
|
|
3447 FROB (Qquite_probable, DET_QUITE_PROBABLE);
|
|
|
3448 FROB (Qsomewhat_likely, DET_SOMEWHAT_LIKELY);
|
|
|
3449 FROB (Qas_likely_as_unlikely, DET_AS_LIKELY_AS_UNLIKELY);
|
|
|
3450 FROB (Qsomewhat_unlikely, DET_SOMEWHAT_UNLIKELY);
|
|
|
3451 FROB (Qquite_improbable, DET_QUITE_IMPROBABLE);
|
|
|
3452 FROB (Qnearly_impossible, DET_NEARLY_IMPOSSIBLE);
|
|
|
3453 #undef FROB
|
|
|
3454
|
|
|
3455 invalid_constant ("Unrecognized detection result", symbol);
|
|
|
3456 return ((enum detection_result) 0); /* not reached */
|
|
|
3457 }
|
|
778
|
3458 #endif /* 0 */
|
|
771
|
3459
|
|
|
3460 /* Set all detection results for a given detector to a specified value. */
|
|
|
3461 void
|
|
|
3462 set_detection_results (struct detection_state *st, int detector, int given)
|
|
|
3463 {
|
|
|
3464 detector_category_dynarr *cats =
|
|
|
3465 Dynarr_at (all_coding_detectors, detector).cats;
|
|
|
3466 int i;
|
|
|
3467
|
|
|
3468 for (i = 0; i < Dynarr_length (cats); i++)
|
|
|
3469 st->categories[Dynarr_at (cats, i).id] = given;
|
|
|
3470 }
|
|
428
|
3471
|
|
|
3472 static int
|
|
|
3473 acceptable_control_char_p (int c)
|
|
|
3474 {
|
|
|
3475 switch (c)
|
|
|
3476 {
|
|
|
3477 /* Allow and ignore control characters that you might
|
|
|
3478 reasonably see in a text file */
|
|
|
3479 case '\r':
|
|
|
3480 case '\n':
|
|
|
3481 case '\t':
|
|
|
3482 case 7: /* bell */
|
|
|
3483 case 8: /* backspace */
|
|
|
3484 case 11: /* vertical tab */
|
|
|
3485 case 12: /* form feed */
|
|
|
3486 case 26: /* MS-DOS C-z junk */
|
|
|
3487 case 31: /* '^_' -- for info */
|
|
|
3488 return 1;
|
|
|
3489 default:
|
|
|
3490 return 0;
|
|
|
3491 }
|
|
|
3492 }
|
|
|
3493
|
|
771
|
3494 #ifdef DEBUG_XEMACS
|
|
|
3495
|
|
|
3496 static UExtbyte
|
|
|
3497 hex_digit_to_char (int digit)
|
|
428
|
3498 {
|
|
771
|
3499 if (digit < 10)
|
|
|
3500 return digit + '0';
|
|
|
3501 else
|
|
|
3502 return digit - 10 + 'A';
|
|
428
|
3503 }
|
|
|
3504
|
|
771
|
3505 static void
|
|
|
3506 output_bytes_in_ascii_and_hex (const UExtbyte *src, Bytecount n)
|
|
428
|
3507 {
|
|
771
|
3508 UExtbyte *ascii = alloca_array (UExtbyte, n + 1);
|
|
|
3509 UExtbyte *hex = alloca_array (UExtbyte, 3 * n + 1);
|
|
|
3510 int i;
|
|
|
3511
|
|
|
3512 for (i = 0; i < n; i++)
|
|
428
|
3513 {
|
|
771
|
3514 UExtbyte c = src[i];
|
|
|
3515 if (c < 0x20)
|
|
|
3516 ascii[i] = '.';
|
|
428
|
3517 else
|
|
771
|
3518 ascii[i] = c;
|
|
|
3519 hex[3 * i] = hex_digit_to_char (c >> 4);
|
|
|
3520 hex[3 * i + 1] = hex_digit_to_char (c & 0xF);
|
|
|
3521 hex[3 * i + 2] = ' ';
|
|
428
|
3522 }
|
|
771
|
3523 ascii[i] = '\0';
|
|
|
3524 hex[3 * i - 1] = '\0';
|
|
|
3525 stderr_out ("%s %s", ascii, hex);
|
|
428
|
3526 }
|
|
|
3527
|
|
771
|
3528 #endif /* DEBUG_XEMACS */
|
|
|
3529
|
|
|
3530 /* Attempt to determine the encoding of the given text. Before calling
|
|
|
3531 this function for the first time, you must zero out the detection state.
|
|
428
|
3532
|
|
|
3533 Returns:
|
|
|
3534
|
|
771
|
3535 0 == keep going
|
|
|
3536 1 == stop
|
|
428
|
3537 */
|
|
|
3538
|
|
|
3539 static int
|
|
771
|
3540 detect_coding_type (struct detection_state *st, const UExtbyte *src,
|
|
|
3541 Bytecount n)
|
|
428
|
3542 {
|
|
771
|
3543 Bytecount n2 = n;
|
|
|
3544 const UExtbyte *src2 = src;
|
|
|
3545 int i;
|
|
|
3546
|
|
|
3547 #ifdef DEBUG_XEMACS
|
|
|
3548 if (!NILP (Vdebug_coding_detection))
|
|
|
3549 {
|
|
|
3550 int bytes = min (16, n);
|
|
|
3551 stderr_out ("detect_coding_type: processing %ld bytes\n", n);
|
|
|
3552 stderr_out ("First %d: ", bytes);
|
|
|
3553 output_bytes_in_ascii_and_hex (src, bytes);
|
|
|
3554 stderr_out ("\nLast %d: ", bytes);
|
|
|
3555 output_bytes_in_ascii_and_hex (src + n - bytes, bytes);
|
|
|
3556 stderr_out ("\n");
|
|
|
3557 }
|
|
|
3558 #endif /* DEBUG_XEMACS */
|
|
428
|
3559 if (!st->seen_non_ascii)
|
|
|
3560 {
|
|
771
|
3561 for (; n2; n2--, src2++)
|
|
428
|
3562 {
|
|
771
|
3563 UExtbyte c = *src2;
|
|
428
|
3564 if ((c < 0x20 && !acceptable_control_char_p (c)) || c >= 0x80)
|
|
|
3565 {
|
|
|
3566 st->seen_non_ascii = 1;
|
|
|
3567 break;
|
|
|
3568 }
|
|
|
3569 }
|
|
|
3570 }
|
|
|
3571
|
|
771
|
3572 for (i = 0; i < coding_detector_count; i++)
|
|
|
3573 Dynarr_at (all_coding_detectors, i).detect_method (st, src, n);
|
|
|
3574
|
|
|
3575 st->bytes_seen += n;
|
|
|
3576
|
|
|
3577 #ifdef DEBUG_XEMACS
|
|
|
3578 if (!NILP (Vdebug_coding_detection))
|
|
|
3579 {
|
|
|
3580 stderr_out ("seen_non_ascii: %d\n", st->seen_non_ascii);
|
|
|
3581 for (i = 0; i < coding_detector_category_count; i++)
|
|
|
3582 stderr_out_lisp
|
|
|
3583 ("%s: %s\n",
|
|
|
3584 2,
|
|
|
3585 coding_category_id_to_symbol (i),
|
|
|
3586 detection_result_number_to_symbol ((enum detection_result)
|
|
|
3587 st->categories[i]));
|
|
|
3588 }
|
|
|
3589 #endif /* DEBUG_XEMACS */
|
|
|
3590
|
|
|
3591 {
|
|
|
3592 int not_unlikely = 0;
|
|
|
3593 int retval;
|
|
|
3594
|
|
|
3595 for (i = 0; i < coding_detector_category_count; i++)
|
|
|
3596 if (st->categories[i] >= 0)
|
|
|
3597 not_unlikely++;
|
|
|
3598
|
|
|
3599 retval = (not_unlikely <= 1
|
|
|
3600 #if 0 /* this is bogus */
|
|
|
3601 || st->bytes_seen >= MAX_BYTES_PROCESSED_FOR_DETECTION
|
|
428
|
3602 #endif
|
|
771
|
3603 );
|
|
|
3604
|
|
|
3605 #ifdef DEBUG_XEMACS
|
|
|
3606 if (!NILP (Vdebug_coding_detection))
|
|
|
3607 stderr_out ("detect_coding_type: returning %d (%s)\n",
|
|
|
3608 retval, retval ? "stop" : "keep going");
|
|
|
3609 #endif /* DEBUG_XEMACS */
|
|
|
3610
|
|
|
3611 return retval;
|
|
428
|
3612 }
|
|
|
3613 }
|
|
|
3614
|
|
|
3615 static Lisp_Object
|
|
771
|
3616 detected_coding_system (struct detection_state *st)
|
|
428
|
3617 {
|
|
771
|
3618 int i;
|
|
|
3619 int even = 1;
|
|
|
3620
|
|
|
3621 if (st->seen_non_ascii)
|
|
|
3622 {
|
|
|
3623 for (i = 0; i < coding_detector_category_count; i++)
|
|
|
3624 if (st->categories[i] != DET_AS_LIKELY_AS_UNLIKELY)
|
|
|
3625 {
|
|
|
3626 even = 0;
|
|
|
3627 break;
|
|
|
3628 }
|
|
|
3629 }
|
|
|
3630
|
|
|
3631 /* #### Here we are ignoring the results of detection when it's all
|
|
|
3632 ASCII. This is obviously a bad thing. But we need to fix up the
|
|
|
3633 existing detection methods somewhat before we can switch. */
|
|
|
3634 if (even)
|
|
428
|
3635 {
|
|
|
3636 /* If the file was entirely or basically ASCII, use the
|
|
|
3637 default value of `buffer-file-coding-system'. */
|
|
|
3638 Lisp_Object retval =
|
|
|
3639 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system;
|
|
|
3640 if (!NILP (retval))
|
|
|
3641 {
|
|
771
|
3642 retval = find_coding_system_for_text_file (retval, 0);
|
|
428
|
3643 if (NILP (retval))
|
|
|
3644 {
|
|
|
3645 warn_when_safe
|
|
|
3646 (Qbad_variable, Qwarning,
|
|
|
3647 "Invalid `default-buffer-file-coding-system', set to nil");
|
|
|
3648 XBUFFER (Vbuffer_defaults)->buffer_file_coding_system = Qnil;
|
|
|
3649 }
|
|
|
3650 }
|
|
|
3651 if (NILP (retval))
|
|
|
3652 retval = Fget_coding_system (Qraw_text);
|
|
|
3653 return retval;
|
|
|
3654 }
|
|
|
3655 else
|
|
|
3656 {
|
|
771
|
3657 int likelihood;
|
|
|
3658 Lisp_Object retval = Qnil;
|
|
|
3659
|
|
|
3660 /* Look through the coding categories first by likelihood and then by
|
|
|
3661 priority and find the first one that is allowed. */
|
|
|
3662
|
|
|
3663 for (likelihood = DET_HIGHEST; likelihood >= DET_LOWEST; likelihood--)
|
|
428
|
3664 {
|
|
771
|
3665 for (i = 0; i < coding_detector_category_count; i++)
|
|
|
3666 {
|
|
|
3667 int cat = coding_category_by_priority[i];
|
|
|
3668 if (st->categories[cat] == likelihood &&
|
|
|
3669 !NILP (coding_category_system[cat]))
|
|
|
3670 {
|
|
|
3671 retval = (get_coding_system_for_text_file
|
|
|
3672 (coding_category_system[cat], 0));
|
|
|
3673 if (likelihood < DET_AS_LIKELY_AS_UNLIKELY)
|
|
|
3674 warn_when_safe_lispobj
|
|
|
3675 (intern ("detection"),
|
|
793
|
3676 Qwarning,
|
|
771
|
3677 emacs_sprintf_string_lisp
|
|
|
3678 (
|
|
|
3679 "Detected coding %s is unlikely to be correct (likelihood == `%s')",
|
|
|
3680 Qnil, 2, XCODING_SYSTEM_NAME (retval),
|
|
|
3681 detection_result_number_to_symbol
|
|
|
3682 ((enum detection_result) likelihood)));
|
|
|
3683 return retval;
|
|
|
3684 }
|
|
|
3685 }
|
|
428
|
3686 }
|
|
771
|
3687
|
|
|
3688 return Fget_coding_system (Qraw_text);
|
|
428
|
3689 }
|
|
|
3690 }
|
|
|
3691
|
|
|
3692 /* Given a seekable read stream and potential coding system and EOL type
|
|
|
3693 as specified, do any autodetection that is called for. If the
|
|
|
3694 coding system and/or EOL type are not `autodetect', they will be left
|
|
|
3695 alone; but this function will never return an autodetect coding system
|
|
|
3696 or EOL type.
|
|
|
3697
|
|
|
3698 This function does not automatically fetch subsidiary coding systems;
|
|
|
3699 that should be unnecessary with the explicit eol-type argument. */
|
|
|
3700
|
|
|
3701 #define LENGTH(string_constant) (sizeof (string_constant) - 1)
|
|
|
3702
|
|
771
|
3703 static Lisp_Object
|
|
|
3704 unwind_free_detection_state (Lisp_Object opaque)
|
|
|
3705 {
|
|
|
3706 struct detection_state *st =
|
|
|
3707 (struct detection_state *) get_opaque_ptr (opaque);
|
|
|
3708 free_detection_state (st);
|
|
|
3709 free_opaque_ptr (opaque);
|
|
|
3710 return Qnil;
|
|
|
3711 }
|
|
|
3712
|
|
|
3713 static Lisp_Object
|
|
|
3714 look_for_coding_system_magic_cookie (const UExtbyte *data, Bytecount len)
|
|
428
|
3715 {
|
|
771
|
3716 Lisp_Object coding_system = Qnil;
|
|
|
3717 const UExtbyte *p;
|
|
|
3718 const UExtbyte *scan_end;
|
|
|
3719
|
|
|
3720 /* Look for initial "-*-"; mode line prefix */
|
|
|
3721 for (p = data,
|
|
|
3722 scan_end = data + len - LENGTH ("-*-coding:?-*-");
|
|
|
3723 p <= scan_end
|
|
|
3724 && *p != '\n'
|
|
|
3725 && *p != '\r';
|
|
|
3726 p++)
|
|
|
3727 if (*p == '-' && *(p+1) == '*' && *(p+2) == '-')
|
|
|
3728 {
|
|
|
3729 const UExtbyte *local_vars_beg = p + 3;
|
|
|
3730 /* Look for final "-*-"; mode line suffix */
|
|
|
3731 for (p = local_vars_beg,
|
|
|
3732 scan_end = data + len - LENGTH ("-*-");
|
|
|
3733 p <= scan_end
|
|
428
|
3734 && *p != '\n'
|
|
|
3735 && *p != '\r';
|
|
771
|
3736 p++)
|
|
|
3737 if (*p == '-' && *(p+1) == '*' && *(p+2) == '-')
|
|
|
3738 {
|
|
|
3739 const UExtbyte *suffix = p;
|
|
|
3740 /* Look for "coding:" */
|
|
|
3741 for (p = local_vars_beg,
|
|
|
3742 scan_end = suffix - LENGTH ("coding:?");
|
|
|
3743 p <= scan_end;
|
|
|
3744 p++)
|
|
|
3745 if (memcmp ("coding:", p, LENGTH ("coding:")) == 0
|
|
|
3746 && (p == local_vars_beg
|
|
|
3747 || (*(p-1) == ' ' ||
|
|
|
3748 *(p-1) == '\t' ||
|
|
|
3749 *(p-1) == ';')))
|
|
|
3750 {
|
|
|
3751 Bytecount n;
|
|
|
3752 Intbyte *name;
|
|
|
3753
|
|
|
3754 p += LENGTH ("coding:");
|
|
|
3755 while (*p == ' ' || *p == '\t') p++;
|
|
|
3756 name = alloca_intbytes (suffix - p + 1);
|
|
|
3757 memcpy (name, p, suffix - p);
|
|
|
3758 name[suffix - p] = '\0';
|
|
|
3759
|
|
|
3760 /* Get coding system name */
|
|
|
3761 /* Characters valid in a MIME charset name (rfc 1521),
|
|
|
3762 and in a Lisp symbol name. */
|
|
|
3763 n = qxestrspn (name,
|
|
|
3764 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
|
|
|
3765 "abcdefghijklmnopqrstuvwxyz"
|
|
|
3766 "0123456789"
|
|
|
3767 "!$%&*+-.^_{|}~");
|
|
|
3768 if (n > 0)
|
|
428
|
3769 {
|
|
771
|
3770 name[n] = '\0';
|
|
|
3771 coding_system =
|
|
|
3772 find_coding_system_for_text_file (intern_int (name),
|
|
|
3773 0);
|
|
428
|
3774 }
|
|
771
|
3775 break;
|
|
|
3776 }
|
|
|
3777 break;
|
|
|
3778 }
|
|
|
3779 break;
|
|
|
3780 }
|
|
|
3781
|
|
|
3782 return coding_system;
|
|
|
3783 }
|
|
|
3784
|
|
|
3785 static Lisp_Object
|
|
|
3786 determine_real_coding_system (Lstream *stream)
|
|
|
3787 {
|
|
|
3788 struct detection_state *st = allocate_detection_state ();
|
|
|
3789 int depth = record_unwind_protect (unwind_free_detection_state,
|
|
|
3790 make_opaque_ptr (st));
|
|
|
3791 UExtbyte buf[4096];
|
|
|
3792 Bytecount nread = Lstream_read (stream, buf, sizeof (buf));
|
|
|
3793 Lisp_Object coding_system = look_for_coding_system_magic_cookie (buf, nread);
|
|
|
3794
|
|
|
3795 if (NILP (coding_system))
|
|
|
3796 {
|
|
|
3797 while (1)
|
|
|
3798 {
|
|
|
3799 if (detect_coding_type (st, buf, nread))
|
|
428
|
3800 break;
|
|
771
|
3801 nread = Lstream_read (stream, buf, sizeof (buf));
|
|
|
3802 if (nread == 0)
|
|
|
3803 break;
|
|
428
|
3804 }
|
|
771
|
3805
|
|
|
3806 coding_system = detected_coding_system (st);
|
|
428
|
3807 }
|
|
|
3808
|
|
|
3809 Lstream_rewind (stream);
|
|
771
|
3810
|
|
|
3811 unbind_to (depth);
|
|
|
3812 return coding_system;
|
|
|
3813 }
|
|
|
3814
|
|
|
3815 static void
|
|
|
3816 undecided_init_coding_stream (struct coding_stream *str)
|
|
|
3817 {
|
|
|
3818 struct undecided_coding_stream *data =
|
|
|
3819 CODING_STREAM_TYPE_DATA (str, undecided);
|
|
|
3820 struct undecided_coding_system *csdata =
|
|
|
3821 XCODING_SYSTEM_TYPE_DATA (str->codesys, undecided);
|
|
|
3822
|
|
|
3823 data->actual = Qnil;
|
|
|
3824
|
|
|
3825 if (str->direction == CODING_DECODE)
|
|
|
3826 {
|
|
|
3827 Lstream *lst = str->other_end;
|
|
|
3828
|
|
|
3829 if ((lst->flags & LSTREAM_FL_READ) &&
|
|
|
3830 Lstream_seekable_p (lst) &&
|
|
|
3831 csdata->do_coding)
|
|
|
3832 /* We can determine the coding system now. */
|
|
|
3833 data->actual = determine_real_coding_system (lst);
|
|
|
3834 }
|
|
|
3835 }
|
|
|
3836
|
|
|
3837 static void
|
|
|
3838 undecided_rewind_coding_stream (struct coding_stream *str)
|
|
|
3839 {
|
|
|
3840 chain_rewind_coding_stream_1 (&CODING_STREAM_TYPE_DATA (str, undecided)->c);
|
|
|
3841 }
|
|
|
3842
|
|
|
3843 static void
|
|
|
3844 undecided_finalize_coding_stream (struct coding_stream *str)
|
|
|
3845 {
|
|
|
3846 struct undecided_coding_stream *data =
|
|
|
3847 CODING_STREAM_TYPE_DATA (str, undecided);
|
|
|
3848
|
|
|
3849 chain_finalize_coding_stream_1
|
|
|
3850 (&CODING_STREAM_TYPE_DATA (str, undecided)->c);
|
|
|
3851 if (data->st)
|
|
|
3852 free_detection_state (data->st);
|
|
|
3853 }
|
|
|
3854
|
|
|
3855 static Lisp_Object
|
|
|
3856 undecided_canonicalize (Lisp_Object codesys)
|
|
|
3857 {
|
|
|
3858 struct undecided_coding_system *csdata =
|
|
|
3859 XCODING_SYSTEM_TYPE_DATA (codesys, undecided);
|
|
|
3860 if (!csdata->do_eol && !csdata->do_coding)
|
|
|
3861 return NILP (csdata->cs) ? Fget_coding_system (Qbinary) : csdata->cs;
|
|
|
3862 if (csdata->do_eol && !csdata->do_coding && NILP (csdata->cs))
|
|
|
3863 return Fget_coding_system (Qconvert_eol_autodetect);
|
|
|
3864 return codesys;
|
|
|
3865 }
|
|
|
3866
|
|
|
3867 static Bytecount
|
|
|
3868 undecided_convert (struct coding_stream *str, const UExtbyte *src,
|
|
|
3869 unsigned_char_dynarr *dst, Bytecount n)
|
|
|
3870 {
|
|
|
3871 int first_time = 0;
|
|
|
3872
|
|
|
3873 if (str->direction == CODING_DECODE)
|
|
|
3874 {
|
|
|
3875 /* At this point, we have only the following possibilities:
|
|
|
3876
|
|
|
3877 do_eol && do_coding
|
|
|
3878 do_coding only
|
|
|
3879 do_eol only and a coding system was specified
|
|
|
3880
|
|
|
3881 Other possibilities are removed during undecided_canonicalize.
|
|
|
3882
|
|
|
3883 Therefore, our substreams are either
|
|
|
3884
|
|
|
3885 lstream_coding -> lstream_dynarr, or
|
|
|
3886 lstream_coding -> lstream_eol -> lstream_dynarr.
|
|
|
3887 */
|
|
|
3888 struct undecided_coding_system *csdata =
|
|
|
3889 XCODING_SYSTEM_TYPE_DATA (str->codesys, undecided);
|
|
|
3890 struct undecided_coding_stream *data =
|
|
|
3891 CODING_STREAM_TYPE_DATA (str, undecided);
|
|
|
3892
|
|
|
3893 if (str->eof)
|
|
|
3894 {
|
|
|
3895 /* Each will close the next. We need to close now because more
|
|
|
3896 data may be generated. */
|
|
|
3897 if (data->c.initted)
|
|
|
3898 Lstream_close (XLSTREAM (data->c.lstreams[0]));
|
|
|
3899 return n;
|
|
|
3900 }
|
|
|
3901
|
|
|
3902 if (!data->c.initted)
|
|
|
3903 {
|
|
|
3904 data->c.lstream_count = csdata->do_eol ? 3 : 2;
|
|
|
3905 data->c.lstreams = xnew_array (Lisp_Object, data->c.lstream_count);
|
|
|
3906
|
|
|
3907 data->c.lstreams[data->c.lstream_count - 1] =
|
|
|
3908 make_dynarr_output_stream (dst);
|
|
|
3909 Lstream_set_buffering
|
|
|
3910 (XLSTREAM (data->c.lstreams[data->c.lstream_count - 1]),
|
|
|
3911 LSTREAM_UNBUFFERED, 0);
|
|
|
3912 if (csdata->do_eol)
|
|
|
3913 {
|
|
|
3914 data->c.lstreams[1] =
|
|
|
3915 make_coding_output_stream
|
|
|
3916 (XLSTREAM (data->c.lstreams[data->c.lstream_count - 1]),
|
|
|
3917 Fget_coding_system (Qconvert_eol_autodetect),
|
|
800
|
3918 CODING_DECODE, 0);
|
|
771
|
3919 Lstream_set_buffering
|
|
|
3920 (XLSTREAM (data->c.lstreams[1]),
|
|
|
3921 LSTREAM_UNBUFFERED, 0);
|
|
|
3922 }
|
|
|
3923
|
|
|
3924 data->c.lstreams[0] =
|
|
|
3925 make_coding_output_stream
|
|
|
3926 (XLSTREAM (data->c.lstreams[1]),
|
|
|
3927 /* Substitute binary if we need to detect the encoding */
|
|
|
3928 csdata->do_coding ? Qbinary : csdata->cs,
|
|
800
|
3929 CODING_DECODE, 0);
|
|
771
|
3930 Lstream_set_buffering (XLSTREAM (data->c.lstreams[0]),
|
|
|
3931 LSTREAM_UNBUFFERED, 0);
|
|
|
3932
|
|
|
3933 first_time = 1;
|
|
|
3934 data->c.initted = 1;
|
|
|
3935 }
|
|
|
3936
|
|
|
3937 /* If necessary, do encoding-detection now. We do this when we're a
|
|
|
3938 writing stream or a non-seekable reading stream, meaning that we
|
|
|
3939 can't just process the whole input, rewind, and start over. */
|
|
|
3940
|
|
|
3941 if (csdata->do_coding)
|
|
|
3942 {
|
|
|
3943 int actual_was_nil = NILP (data->actual);
|
|
|
3944 if (NILP (data->actual))
|
|
|
3945 {
|
|
|
3946 if (!data->st)
|
|
|
3947 data->st = allocate_detection_state ();
|
|
|
3948 if (first_time)
|
|
|
3949 /* #### This is cheesy. What we really ought to do is buffer
|
|
|
3950 up a certain minimum amount of data to get a better result.
|
|
|
3951 */
|
|
|
3952 data->actual = look_for_coding_system_magic_cookie (src, n);
|
|
|
3953 if (NILP (data->actual))
|
|
|
3954 {
|
|
|
3955 /* #### This is cheesy. What we really ought to do is buffer
|
|
|
3956 up a certain minimum amount of data so as to get a less
|
|
|
3957 random result when doing subprocess detection. */
|
|
|
3958 detect_coding_type (data->st, src, n);
|
|
|
3959 data->actual = detected_coding_system (data->st);
|
|
|
3960 }
|
|
|
3961 }
|
|
|
3962 /* We need to set the detected coding system if we actually have
|
|
|
3963 such a coding system but didn't before. That is the case
|
|
|
3964 either when we just detected it in the previous code or when
|
|
|
3965 it was detected during undecided_init_coding_stream(). We
|
|
|
3966 can check for that using first_time. */
|
|
|
3967 if (!NILP (data->actual) && (actual_was_nil || first_time))
|
|
|
3968 {
|
|
|
3969 /* If the detected coding system doesn't allow for EOL
|
|
|
3970 autodetection, try to get the equivalent that does;
|
|
|
3971 otherwise, disable EOL detection (overriding whatever
|
|
|
3972 may already have been detected). */
|
|
|
3973 if (XCODING_SYSTEM_EOL_TYPE (data->actual) != EOL_AUTODETECT)
|
|
|
3974 {
|
|
|
3975 if (!NILP (XCODING_SYSTEM_SUBSIDIARY_PARENT (data->actual)))
|
|
|
3976 data->actual =
|
|
|
3977 XCODING_SYSTEM_SUBSIDIARY_PARENT (data->actual);
|
|
|
3978 else if (data->c.lstream_count == 3)
|
|
|
3979 set_coding_stream_coding_system
|
|
|
3980 (XLSTREAM (data->c.lstreams[1]),
|
|
|
3981 Fget_coding_system (Qidentity));
|
|
|
3982 }
|
|
|
3983 set_coding_stream_coding_system
|
|
|
3984 (XLSTREAM (data->c.lstreams[0]), data->actual);
|
|
|
3985 }
|
|
|
3986 }
|
|
|
3987
|
|
|
3988 if (Lstream_write (XLSTREAM (data->c.lstreams[0]), src, n) < 0)
|
|
|
3989 return -1;
|
|
|
3990 return n;
|
|
|
3991 }
|
|
|
3992 else
|
|
|
3993 return no_conversion_convert (str, src, dst, n);
|
|
|
3994 }
|
|
|
3995
|
|
|
3996 static Lisp_Object
|
|
|
3997 undecided_canonicalize_after_coding (struct coding_stream *str)
|
|
|
3998 {
|
|
|
3999 struct undecided_coding_stream *data =
|
|
|
4000 CODING_STREAM_TYPE_DATA (str, undecided);
|
|
|
4001 Lisp_Object ret, eolret;
|
|
|
4002
|
|
|
4003 if (str->direction == CODING_ENCODE)
|
|
|
4004 return str->codesys;
|
|
|
4005
|
|
|
4006 if (!data->c.initted)
|
|
|
4007 return Fget_coding_system (Qundecided);
|
|
|
4008
|
|
|
4009 ret = coding_stream_canonicalize_after_coding
|
|
|
4010 (XLSTREAM (data->c.lstreams[0]));
|
|
|
4011 if (NILP (ret))
|
|
|
4012 ret = Fget_coding_system (Qundecided);
|
|
|
4013 if (XCODING_SYSTEM_EOL_TYPE (ret) != EOL_AUTODETECT)
|
|
|
4014 return ret;
|
|
|
4015 eolret = coding_stream_canonicalize_after_coding
|
|
|
4016 (XLSTREAM (data->c.lstreams[1]));
|
|
|
4017 if (!EQ (XCODING_SYSTEM_TYPE (eolret), Qconvert_eol))
|
|
|
4018 return ret;
|
|
|
4019 return
|
|
|
4020 Fsubsidiary_coding_system (ret, Fcoding_system_property (eolret,
|
|
|
4021 Qsubtype));
|
|
|
4022 }
|
|
|
4023
|
|
|
4024
|
|
|
4025 /************************************************************************/
|
|
|
4026 /* Lisp interface: Coding category functions and detection */
|
|
|
4027 /************************************************************************/
|
|
|
4028
|
|
|
4029 DEFUN ("coding-category-list", Fcoding_category_list, 0, 0, 0, /*
|
|
|
4030 Return a list of all recognized coding categories.
|
|
|
4031 */
|
|
|
4032 ())
|
|
|
4033 {
|
|
|
4034 int i;
|
|
|
4035 Lisp_Object list = Qnil;
|
|
|
4036
|
|
|
4037 for (i = 0; i < coding_detector_count; i++)
|
|
|
4038 {
|
|
|
4039 detector_category_dynarr *cats =
|
|
|
4040 Dynarr_at (all_coding_detectors, i).cats;
|
|
|
4041 int j;
|
|
|
4042
|
|
|
4043 for (j = 0; j < Dynarr_length (cats); j++)
|
|
|
4044 list = Fcons (Dynarr_at (cats, j).sym, list);
|
|
|
4045 }
|
|
|
4046
|
|
|
4047 return Fnreverse (list);
|
|
|
4048 }
|
|
|
4049
|
|
|
4050 DEFUN ("set-coding-priority-list", Fset_coding_priority_list, 1, 1, 0, /*
|
|
|
4051 Change the priority order of the coding categories.
|
|
|
4052 LIST should be list of coding categories, in descending order of
|
|
|
4053 priority. Unspecified coding categories will be lower in priority
|
|
|
4054 than all specified ones, in the same relative order they were in
|
|
|
4055 previously.
|
|
|
4056 */
|
|
|
4057 (list))
|
|
|
4058 {
|
|
|
4059 int *category_to_priority =
|
|
|
4060 alloca_array (int, coding_detector_category_count);
|
|
|
4061 int i, j;
|
|
|
4062 Lisp_Object rest;
|
|
|
4063
|
|
|
4064 /* First generate a list that maps coding categories to priorities. */
|
|
|
4065
|
|
|
4066 for (i = 0; i < coding_detector_category_count; i++)
|
|
|
4067 category_to_priority[i] = -1;
|
|
|
4068
|
|
|
4069 /* Highest priority comes from the specified list. */
|
|
|
4070 i = 0;
|
|
|
4071 EXTERNAL_LIST_LOOP (rest, list)
|
|
|
4072 {
|
|
|
4073 int cat = coding_category_symbol_to_id (XCAR (rest));
|
|
|
4074
|
|
|
4075 if (category_to_priority[cat] >= 0)
|
|
|
4076 sferror ("Duplicate coding category in list", XCAR (rest));
|
|
|
4077 category_to_priority[cat] = i++;
|
|
|
4078 }
|
|
|
4079
|
|
|
4080 /* Now go through the existing categories by priority to retrieve
|
|
|
4081 the categories not yet specified and preserve their priority
|
|
|
4082 order. */
|
|
|
4083 for (j = 0; j < coding_detector_category_count; j++)
|
|
|
4084 {
|
|
|
4085 int cat = coding_category_by_priority[j];
|
|
|
4086 if (category_to_priority[cat] < 0)
|
|
|
4087 category_to_priority[cat] = i++;
|
|
|
4088 }
|
|
|
4089
|
|
|
4090 /* Now we need to construct the inverse of the mapping we just
|
|
|
4091 constructed. */
|
|
|
4092
|
|
|
4093 for (i = 0; i < coding_detector_category_count; i++)
|
|
|
4094 coding_category_by_priority[category_to_priority[i]] = i;
|
|
|
4095
|
|
|
4096 /* Phew! That was confusing. */
|
|
|
4097 return Qnil;
|
|
|
4098 }
|
|
|
4099
|
|
|
4100 DEFUN ("coding-priority-list", Fcoding_priority_list, 0, 0, 0, /*
|
|
|
4101 Return a list of coding categories in descending order of priority.
|
|
|
4102 */
|
|
|
4103 ())
|
|
|
4104 {
|
|
|
4105 int i;
|
|
|
4106 Lisp_Object list = Qnil;
|
|
|
4107
|
|
|
4108 for (i = 0; i < coding_detector_category_count; i++)
|
|
|
4109 list =
|
|
|
4110 Fcons (coding_category_id_to_symbol (coding_category_by_priority[i]),
|
|
|
4111 list);
|
|
|
4112 return Fnreverse (list);
|
|
|
4113 }
|
|
|
4114
|
|
|
4115 DEFUN ("set-coding-category-system", Fset_coding_category_system, 2, 2, 0, /*
|
|
|
4116 Change the coding system associated with a coding category.
|
|
|
4117 */
|
|
|
4118 (coding_category, coding_system))
|
|
|
4119 {
|
|
|
4120 coding_category_system[coding_category_symbol_to_id (coding_category)] =
|
|
|
4121 Fget_coding_system (coding_system);
|
|
|
4122 return Qnil;
|
|
|
4123 }
|
|
|
4124
|
|
|
4125 DEFUN ("coding-category-system", Fcoding_category_system, 1, 1, 0, /*
|
|
|
4126 Return the coding system associated with a coding category.
|
|
|
4127 */
|
|
|
4128 (coding_category))
|
|
|
4129 {
|
|
|
4130 Lisp_Object sys =
|
|
|
4131 coding_category_system[coding_category_symbol_to_id (coding_category)];
|
|
|
4132
|
|
|
4133 if (!NILP (sys))
|
|
|
4134 return XCODING_SYSTEM_NAME (sys);
|
|
|
4135 return Qnil;
|
|
|
4136 }
|
|
|
4137
|
|
800
|
4138 /* Detect the encoding of STREAM. Assumes stream is at the begnning and will
|
|
|
4139 read through to the end of STREAM, leaving it there but open. */
|
|
|
4140
|
|
771
|
4141 Lisp_Object
|
|
|
4142 detect_coding_stream (Lisp_Object stream)
|
|
|
4143 {
|
|
|
4144 Lisp_Object val = Qnil;
|
|
|
4145 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
4146 UExtbyte random_buffer[65536];
|
|
|
4147 Lisp_Object binary_instream =
|
|
|
4148 make_coding_input_stream
|
|
|
4149 (XLSTREAM (stream), Qbinary,
|
|
800
|
4150 CODING_ENCODE, 1);
|
|
771
|
4151 Lisp_Object decstream =
|
|
|
4152 make_coding_input_stream
|
|
|
4153 (XLSTREAM (binary_instream),
|
|
800
|
4154 Qundecided, CODING_DECODE, 0);
|
|
771
|
4155 Lstream *decstr = XLSTREAM (decstream);
|
|
|
4156
|
|
|
4157 GCPRO3 (decstream, stream, binary_instream);
|
|
|
4158 /* Read and discard all data; detection happens as a side effect of this,
|
|
|
4159 and we examine what was detected afterwards. */
|
|
|
4160 while (Lstream_read (decstr, random_buffer, sizeof (random_buffer)) > 0)
|
|
|
4161 ;
|
|
|
4162
|
|
|
4163 val = coding_stream_detected_coding_system (decstr);
|
|
|
4164 Lstream_close (decstr);
|
|
|
4165 Lstream_delete (decstr);
|
|
|
4166 Lstream_delete (XLSTREAM (binary_instream));
|
|
|
4167 UNGCPRO;
|
|
|
4168 return val;
|
|
428
|
4169 }
|
|
|
4170
|
|
|
4171 DEFUN ("detect-coding-region", Fdetect_coding_region, 2, 3, 0, /*
|
|
|
4172 Detect coding system of the text in the region between START and END.
|
|
444
|
4173 Return a list of possible coding systems ordered by priority.
|
|
|
4174 If only ASCII characters are found, return 'undecided or one of
|
|
428
|
4175 its subsidiary coding systems according to a detected end-of-line
|
|
|
4176 type. Optional arg BUFFER defaults to the current buffer.
|
|
|
4177 */
|
|
|
4178 (start, end, buffer))
|
|
|
4179 {
|
|
|
4180 Lisp_Object val = Qnil;
|
|
|
4181 struct buffer *buf = decode_buffer (buffer, 0);
|
|
665
|
4182 Charbpos b, e;
|
|
771
|
4183 Lisp_Object lb_instream;
|
|
428
|
4184
|
|
|
4185 get_buffer_range_char (buf, start, end, &b, &e, 0);
|
|
|
4186 lb_instream = make_lisp_buffer_input_stream (buf, b, e, 0);
|
|
771
|
4187
|
|
|
4188 val = detect_coding_stream (lb_instream);
|
|
|
4189 Lstream_delete (XLSTREAM (lb_instream));
|
|
428
|
4190 return val;
|
|
|
4191 }
|
|
|
4192
|
|
|
4193
|
|
771
|
4194
|
|
|
4195 #ifdef DEBUG_XEMACS
|
|
|
4196
|
|
428
|
4197 /************************************************************************/
|
|
771
|
4198 /* Internal methods */
|
|
|
4199 /************************************************************************/
|
|
|
4200
|
|
|
4201 /* Raw (internally-formatted) data. */
|
|
|
4202 DEFINE_CODING_SYSTEM_TYPE (internal);
|
|
428
|
4203
|
|
665
|
4204 static Bytecount
|
|
771
|
4205 internal_convert (struct coding_stream *str, const UExtbyte *src,
|
|
|
4206 unsigned_char_dynarr *dst, Bytecount n)
|
|
|
4207 {
|
|
|
4208 Bytecount orign = n;
|
|
|
4209 Dynarr_add_many (dst, src, n);
|
|
|
4210 return orign;
|
|
|
4211 }
|
|
|
4212
|
|
|
4213 #endif /* DEBUG_XEMACS */
|
|
|
4214
|
|
|
4215
|
|
|
4216
|
|
|
4217 #ifdef HAVE_ZLIB
|
|
|
4218
|
|
|
4219 /************************************************************************/
|
|
|
4220 /* Gzip methods */
|
|
|
4221 /************************************************************************/
|
|
|
4222
|
|
|
4223 DEFINE_CODING_SYSTEM_TYPE (gzip);
|
|
|
4224
|
|
|
4225 struct gzip_coding_system
|
|
428
|
4226 {
|
|
771
|
4227 int level; /* 0 through 9, or -1 for default */
|
|
|
4228 };
|
|
|
4229
|
|
|
4230 #define CODING_SYSTEM_GZIP_LEVEL(codesys) \
|
|
|
4231 (CODING_SYSTEM_TYPE_DATA (codesys, gzip)->level)
|
|
|
4232 #define XCODING_SYSTEM_GZIP_LEVEL(codesys) \
|
|
|
4233 (XCODING_SYSTEM_TYPE_DATA (codesys, gzip)->level)
|
|
|
4234
|
|
|
4235 struct gzip_coding_stream
|
|
428
|
4236 {
|
|
771
|
4237 z_stream stream;
|
|
|
4238 int stream_initted;
|
|
|
4239 int reached_eof; /* #### this should be handled by the caller, once we
|
|
|
4240 return LSTREAM_EOF */
|
|
|
4241 };
|
|
|
4242
|
|
|
4243 static const struct lrecord_description
|
|
|
4244 gzip_coding_system_description[] = {
|
|
|
4245 { XD_END }
|
|
|
4246 };
|
|
|
4247
|
|
|
4248 enum source_sink_type
|
|
|
4249 gzip_conversion_end_type (Lisp_Object codesys)
|
|
|
4250 {
|
|
|
4251 return DECODES_BYTE_TO_BYTE;
|
|
428
|
4252 }
|
|
|
4253
|
|
|
4254 static void
|
|
771
|
4255 gzip_init (Lisp_Object codesys)
|
|
|
4256 {
|
|
|
4257 struct gzip_coding_system *data = XCODING_SYSTEM_TYPE_DATA (codesys, gzip);
|
|
|
4258 data->level = -1;
|
|
|
4259 }
|
|
|
4260
|
|
|
4261 static void
|
|
|
4262 gzip_print (Lisp_Object cs, Lisp_Object printcharfun, int escapeflag)
|
|
428
|
4263 {
|
|
771
|
4264 struct gzip_coding_system *data = XCODING_SYSTEM_TYPE_DATA (cs, gzip);
|
|
|
4265
|
|
|
4266 write_c_string ("(", printcharfun);
|
|
|
4267 if (data->level == -1)
|
|
|
4268 write_c_string ("default", printcharfun);
|
|
|
4269 else
|
|
|
4270 print_internal (make_int (data->level), printcharfun, 0);
|
|
|
4271 write_c_string (")", printcharfun);
|
|
428
|
4272 }
|
|
|
4273
|
|
|
4274 static int
|
|
771
|
4275 gzip_putprop (Lisp_Object codesys, Lisp_Object key, Lisp_Object value)
|
|
428
|
4276 {
|
|
771
|
4277 struct gzip_coding_system *data = XCODING_SYSTEM_TYPE_DATA (codesys, gzip);
|
|
|
4278
|
|
|
4279 if (EQ (key, Qlevel))
|
|
428
|
4280 {
|
|
771
|
4281 if (EQ (value, Qdefault))
|
|
|
4282 data->level = -1;
|
|
|
4283 else
|
|
428
|
4284 {
|
|
771
|
4285 CHECK_INT (value);
|
|
|
4286 check_int_range (XINT (value), 0, 9);
|
|
|
4287 data->level = XINT (value);
|
|
428
|
4288 }
|
|
|
4289 }
|
|
|
4290 else
|
|
771
|
4291 return 0;
|
|
|
4292 return 1;
|
|
428
|
4293 }
|
|
|
4294
|
|
|
4295 static Lisp_Object
|
|
771
|
4296 gzip_getprop (Lisp_Object coding_system, Lisp_Object prop)
|
|
428
|
4297 {
|
|
771
|
4298 struct gzip_coding_system *data =
|
|
|
4299 XCODING_SYSTEM_TYPE_DATA (coding_system, gzip);
|
|
|
4300
|
|
|
4301 if (EQ (prop, Qlevel))
|
|
428
|
4302 {
|
|
771
|
4303 if (data->level == -1)
|
|
|
4304 return Qdefault;
|
|
|
4305 return make_int (data->level);
|
|
428
|
4306 }
|
|
771
|
4307
|
|
|
4308 return Qunbound;
|
|
428
|
4309 }
|
|
|
4310
|
|
|
4311 static void
|
|
771
|
4312 gzip_init_coding_stream (struct coding_stream *str)
|
|
428
|
4313 {
|
|
771
|
4314 struct gzip_coding_stream *data = CODING_STREAM_TYPE_DATA (str, gzip);
|
|
|
4315 if (data->stream_initted)
|
|
428
|
4316 {
|
|
771
|
4317 if (str->direction == CODING_DECODE)
|
|
|
4318 inflateEnd (&data->stream);
|
|
|
4319 else
|
|
|
4320 deflateEnd (&data->stream);
|
|
|
4321 data->stream_initted = 0;
|
|
428
|
4322 }
|
|
771
|
4323 data->reached_eof = 0;
|
|
428
|
4324 }
|
|
|
4325
|
|
|
4326 static void
|
|
771
|
4327 gzip_rewind_coding_stream (struct coding_stream *str)
|
|
428
|
4328 {
|
|
771
|
4329 gzip_init_coding_stream (str);
|
|
428
|
4330 }
|
|
|
4331
|
|
771
|
4332 static Bytecount
|
|
|
4333 gzip_convert (struct coding_stream *str,
|
|
|
4334 const UExtbyte *src,
|
|
|
4335 unsigned_char_dynarr *dst, Bytecount n)
|
|
428
|
4336 {
|
|
771
|
4337 struct gzip_coding_stream *data = CODING_STREAM_TYPE_DATA (str, gzip);
|
|
|
4338 int zerr;
|
|
|
4339 if (str->direction == CODING_DECODE)
|
|
428
|
4340 {
|
|
771
|
4341 if (data->reached_eof)
|
|
|
4342 return n; /* eat the data */
|
|
|
4343
|
|
|
4344 if (!data->stream_initted)
|
|
428
|
4345 {
|
|
771
|
4346 xzero (data->stream);
|
|
|
4347 if (inflateInit (&data->stream) != Z_OK)
|
|
|
4348 return LSTREAM_ERROR;
|
|
|
4349 data->stream_initted = 1;
|
|
428
|
4350 }
|
|
771
|
4351
|
|
|
4352 data->stream.next_in = (Bytef *) src;
|
|
|
4353 data->stream.avail_in = n;
|
|
|
4354
|
|
|
4355 /* Normally we stop when we've fed all data to the decompressor; but
|
|
|
4356 if we're at the end of the input, and the decompressor hasn't
|
|
|
4357 reported EOF, we need to keep going, as there might be more output
|
|
|
4358 to generate. Z_OK from the decompressor means input was processed
|
|
|
4359 or output was generated; if neither, we break out of the loop.
|
|
|
4360 Other return values are:
|
|
|
4361
|
|
|
4362 Z_STREAM_END EOF from decompressor
|
|
|
4363 Z_DATA_ERROR Corrupted data
|
|
|
4364 Z_BUF_ERROR No progress possible (this should happen if
|
|
|
4365 we try to feed it an incomplete file)
|
|
|
4366 Z_MEM_ERROR Out of memory
|
|
|
4367 Z_STREAM_ERROR (should never happen)
|
|
|
4368 Z_NEED_DICT (#### when will this happen?)
|
|
|
4369 */
|
|
|
4370 while (data->stream.avail_in > 0 || str->eof)
|
|
|
4371 {
|
|
|
4372 /* Reserve an output buffer of the same size as the input buffer;
|
|
|
4373 if that's not enough, we keep reserving the same size. */
|
|
|
4374 Bytecount reserved = n;
|
|
|
4375 Dynarr_add_many (dst, 0, reserved);
|
|
|
4376 /* Careful here! Don't retrieve the pointer until after
|
|
|
4377 reserving the space, or it might be bogus */
|
|
|
4378 data->stream.next_out =
|
|
|
4379 Dynarr_atp (dst, Dynarr_length (dst) - reserved);
|
|
|
4380 data->stream.avail_out = reserved;
|
|
|
4381 zerr = inflate (&data->stream, Z_NO_FLUSH);
|
|
|
4382 /* Lop off the unused portion */
|
|
|
4383 Dynarr_set_size (dst, Dynarr_length (dst) - data->stream.avail_out);
|
|
|
4384 if (zerr != Z_OK)
|
|
|
4385 break;
|
|
|
4386 }
|
|
|
4387
|
|
|
4388 if (zerr == Z_STREAM_END)
|
|
|
4389 data->reached_eof = 1;
|
|
|
4390
|
|
|
4391 if ((Bytecount) data->stream.avail_in < n)
|
|
|
4392 return n - data->stream.avail_in;
|
|
|
4393
|
|
|
4394 if (zerr == Z_OK || zerr == Z_STREAM_END)
|
|
|
4395 return 0;
|
|
|
4396
|
|
|
4397 return LSTREAM_ERROR;
|
|
428
|
4398 }
|
|
|
4399 else
|
|
|
4400 {
|
|
771
|
4401 if (!data->stream_initted)
|
|
|
4402 {
|
|
|
4403 int level = XCODING_SYSTEM_GZIP_LEVEL (str->codesys);
|
|
|
4404 xzero (data->stream);
|
|
|
4405 if (deflateInit (&data->stream,
|
|
|
4406 level == -1 ? Z_DEFAULT_COMPRESSION : level) !=
|
|
|
4407 Z_OK)
|
|
|
4408 return LSTREAM_ERROR;
|
|
|
4409 data->stream_initted = 1;
|
|
428
|
4410 }
|
|
771
|
4411
|
|
|
4412 data->stream.next_in = (Bytef *) src;
|
|
|
4413 data->stream.avail_in = n;
|
|
|
4414
|
|
|
4415 /* Normally we stop when we've fed all data to the compressor; but if
|
|
|
4416 we're at the end of the input, and the compressor hasn't reported
|
|
|
4417 EOF, we need to keep going, as there might be more output to
|
|
|
4418 generate. (To signal EOF on our end, we set the FLUSH parameter
|
|
|
4419 to Z_FINISH; when all data is output, Z_STREAM_END will be
|
|
|
4420 returned.) Z_OK from the compressor means input was processed or
|
|
|
4421 output was generated; if neither, we break out of the loop. Other
|
|
|
4422 return values are:
|
|
|
4423
|
|
|
4424 Z_STREAM_END EOF from compressor
|
|
|
4425 Z_BUF_ERROR No progress possible (should never happen)
|
|
|
4426 Z_STREAM_ERROR (should never happen)
|
|
|
4427 */
|
|
|
4428 while (data->stream.avail_in > 0 || str->eof)
|
|
|
4429 {
|
|
|
4430 /* Reserve an output buffer of the same size as the input buffer;
|
|
|
4431 if that's not enough, we keep reserving the same size. */
|
|
|
4432 Bytecount reserved = n;
|
|
|
4433 Dynarr_add_many (dst, 0, reserved);
|
|
|
4434 /* Careful here! Don't retrieve the pointer until after
|
|
|
4435 reserving the space, or it might be bogus */
|
|
|
4436 data->stream.next_out =
|
|
|
4437 Dynarr_atp (dst, Dynarr_length (dst) - reserved);
|
|
|
4438 data->stream.avail_out = reserved;
|
|
|
4439 zerr =
|
|
|
4440 deflate (&data->stream,
|
|
|
4441 str->eof ? Z_FINISH : Z_NO_FLUSH);
|
|
|
4442 /* Lop off the unused portion */
|
|
|
4443 Dynarr_set_size (dst, Dynarr_length (dst) - data->stream.avail_out);
|
|
|
4444 if (zerr != Z_OK)
|
|
|
4445 break;
|
|
|
4446 }
|
|
|
4447
|
|
|
4448 if ((Bytecount) data->stream.avail_in < n)
|
|
|
4449 return n - data->stream.avail_in;
|
|
|
4450
|
|
|
4451 if (zerr == Z_OK || zerr == Z_STREAM_END)
|
|
|
4452 return 0;
|
|
|
4453
|
|
|
4454 return LSTREAM_ERROR;
|
|
428
|
4455 }
|
|
|
4456 }
|
|
|
4457
|
|
771
|
4458 #endif /* HAVE_ZLIB */
|
|
428
|
4459
|
|
|
4460
|
|
|
4461 /************************************************************************/
|
|
|
4462 /* Initialization */
|
|
|
4463 /************************************************************************/
|
|
|
4464
|
|
|
4465 void
|
|
|
4466 syms_of_file_coding (void)
|
|
|
4467 {
|
|
442
|
4468 INIT_LRECORD_IMPLEMENTATION (coding_system);
|
|
|
4469
|
|
771
|
4470 DEFSUBR (Fvalid_coding_system_type_p);
|
|
|
4471 DEFSUBR (Fcoding_system_type_list);
|
|
428
|
4472 DEFSUBR (Fcoding_system_p);
|
|
|
4473 DEFSUBR (Ffind_coding_system);
|
|
|
4474 DEFSUBR (Fget_coding_system);
|
|
|
4475 DEFSUBR (Fcoding_system_list);
|
|
|
4476 DEFSUBR (Fcoding_system_name);
|
|
|
4477 DEFSUBR (Fmake_coding_system);
|
|
|
4478 DEFSUBR (Fcopy_coding_system);
|
|
440
|
4479 DEFSUBR (Fcoding_system_canonical_name_p);
|
|
|
4480 DEFSUBR (Fcoding_system_alias_p);
|
|
|
4481 DEFSUBR (Fcoding_system_aliasee);
|
|
428
|
4482 DEFSUBR (Fdefine_coding_system_alias);
|
|
|
4483 DEFSUBR (Fsubsidiary_coding_system);
|
|
771
|
4484 DEFSUBR (Fcoding_system_base);
|
|
|
4485 DEFSUBR (Fcoding_system_used_for_io);
|
|
428
|
4486
|
|
|
4487 DEFSUBR (Fcoding_system_type);
|
|
771
|
4488 DEFSUBR (Fcoding_system_description);
|
|
428
|
4489 DEFSUBR (Fcoding_system_property);
|
|
|
4490
|
|
|
4491 DEFSUBR (Fcoding_category_list);
|
|
|
4492 DEFSUBR (Fset_coding_priority_list);
|
|
|
4493 DEFSUBR (Fcoding_priority_list);
|
|
|
4494 DEFSUBR (Fset_coding_category_system);
|
|
|
4495 DEFSUBR (Fcoding_category_system);
|
|
|
4496
|
|
|
4497 DEFSUBR (Fdetect_coding_region);
|
|
|
4498 DEFSUBR (Fdecode_coding_region);
|
|
|
4499 DEFSUBR (Fencode_coding_region);
|
|
563
|
4500 DEFSYMBOL_MULTIWORD_PREDICATE (Qcoding_systemp);
|
|
|
4501 DEFSYMBOL (Qno_conversion);
|
|
771
|
4502 DEFSYMBOL (Qconvert_eol);
|
|
|
4503 DEFSYMBOL (Qconvert_eol_autodetect);
|
|
|
4504 DEFSYMBOL (Qconvert_eol_lf);
|
|
|
4505 DEFSYMBOL (Qconvert_eol_cr);
|
|
|
4506 DEFSYMBOL (Qconvert_eol_crlf);
|
|
563
|
4507 DEFSYMBOL (Qraw_text);
|
|
771
|
4508
|
|
563
|
4509 DEFSYMBOL (Qmnemonic);
|
|
|
4510 DEFSYMBOL (Qeol_type);
|
|
|
4511 DEFSYMBOL (Qpost_read_conversion);
|
|
|
4512 DEFSYMBOL (Qpre_write_conversion);
|
|
|
4513
|
|
771
|
4514 DEFSYMBOL (Qtranslation_table_for_decode);
|
|
|
4515 DEFSYMBOL (Qtranslation_table_for_encode);
|
|
|
4516 DEFSYMBOL (Qsafe_chars);
|
|
|
4517 DEFSYMBOL (Qsafe_charsets);
|
|
|
4518 DEFSYMBOL (Qmime_charset);
|
|
|
4519 DEFSYMBOL (Qvalid_codes);
|
|
|
4520
|
|
563
|
4521 DEFSYMBOL (Qcr);
|
|
|
4522 DEFSYMBOL (Qlf);
|
|
|
4523 DEFSYMBOL (Qcrlf);
|
|
|
4524 DEFSYMBOL (Qeol_cr);
|
|
|
4525 DEFSYMBOL (Qeol_lf);
|
|
|
4526 DEFSYMBOL (Qeol_crlf);
|
|
|
4527 DEFSYMBOL (Qencode);
|
|
|
4528 DEFSYMBOL (Qdecode);
|
|
428
|
4529
|
|
771
|
4530 DEFSYMBOL (Qnear_certainty);
|
|
|
4531 DEFSYMBOL (Qquite_probable);
|
|
|
4532 DEFSYMBOL (Qsomewhat_likely);
|
|
|
4533 DEFSYMBOL (Qas_likely_as_unlikely);
|
|
|
4534 DEFSYMBOL (Qsomewhat_unlikely);
|
|
|
4535 DEFSYMBOL (Qquite_improbable);
|
|
|
4536 DEFSYMBOL (Qnearly_impossible);
|
|
|
4537
|
|
|
4538 DEFSYMBOL (Qdo_eol);
|
|
|
4539 DEFSYMBOL (Qdo_coding);
|
|
|
4540
|
|
|
4541 DEFSYMBOL (Qcanonicalize_after_coding);
|
|
|
4542
|
|
|
4543 DEFSYMBOL (Qescape_quoted);
|
|
|
4544
|
|
|
4545 #ifdef HAVE_ZLIB
|
|
|
4546 DEFSYMBOL (Qgzip);
|
|
|
4547 #endif
|
|
|
4548
|
|
|
4549 /* WARNING: The existing categories are intimately tied to the function
|
|
|
4550 `coding-system-category' in coding.el. If you change a category, or
|
|
|
4551 change the layout of any coding system associated with a category, you
|
|
|
4552 need to check that function and make sure it's written properly. */
|
|
|
4553
|
|
|
4554 #ifdef HAVE_DEFAULT_EOL_DETECTION
|
|
|
4555 Fprovide (intern ("unix-default-eol-detection"));
|
|
|
4556 #endif
|
|
428
|
4557 }
|
|
|
4558
|
|
|
4559 void
|
|
|
4560 lstream_type_create_file_coding (void)
|
|
|
4561 {
|
|
771
|
4562 LSTREAM_HAS_METHOD (coding, reader);
|
|
|
4563 LSTREAM_HAS_METHOD (coding, writer);
|
|
|
4564 LSTREAM_HAS_METHOD (coding, rewinder);
|
|
|
4565 LSTREAM_HAS_METHOD (coding, seekable_p);
|
|
|
4566 LSTREAM_HAS_METHOD (coding, marker);
|
|
|
4567 LSTREAM_HAS_METHOD (coding, flusher);
|
|
|
4568 LSTREAM_HAS_METHOD (coding, closer);
|
|
|
4569 LSTREAM_HAS_METHOD (coding, finalizer);
|
|
|
4570 }
|
|
|
4571
|
|
|
4572 void
|
|
|
4573 coding_system_type_create (void)
|
|
|
4574 {
|
|
|
4575 int i;
|
|
|
4576
|
|
|
4577 staticpro (&Vcoding_system_hash_table);
|
|
|
4578 Vcoding_system_hash_table =
|
|
|
4579 make_lisp_hash_table (50, HASH_TABLE_NON_WEAK, HASH_TABLE_EQ);
|
|
|
4580
|
|
|
4581 the_coding_system_type_entry_dynarr = Dynarr_new (coding_system_type_entry);
|
|
|
4582 dump_add_root_struct_ptr (&the_coding_system_type_entry_dynarr,
|
|
|
4583 &csted_description);
|
|
|
4584
|
|
|
4585 Vcoding_system_type_list = Qnil;
|
|
|
4586 staticpro (&Vcoding_system_type_list);
|
|
|
4587
|
|
|
4588 /* Initialize to something reasonable ... */
|
|
|
4589 for (i = 0; i < MAX_DETECTOR_CATEGORIES; i++)
|
|
|
4590 {
|
|
|
4591 coding_category_system[i] = Qnil;
|
|
|
4592 dump_add_root_object (&coding_category_system[i]);
|
|
|
4593 coding_category_by_priority[i] = i;
|
|
|
4594 }
|
|
|
4595
|
|
|
4596 dump_add_opaque (coding_category_by_priority,
|
|
|
4597 sizeof (coding_category_by_priority));
|
|
|
4598
|
|
|
4599 all_coding_detectors = Dynarr_new2 (detector_dynarr, struct detector);
|
|
|
4600 dump_add_root_struct_ptr (&all_coding_detectors,
|
|
|
4601 &detector_dynarr_description);
|
|
|
4602
|
|
|
4603 dump_add_opaque_int (&coding_system_tick);
|
|
|
4604 dump_add_opaque_int (&coding_detector_count);
|
|
|
4605 dump_add_opaque_int (&coding_detector_category_count);
|
|
|
4606
|
|
|
4607 INITIALIZE_CODING_SYSTEM_TYPE (no_conversion,
|
|
|
4608 "no-conversion-coding-system-p");
|
|
|
4609 CODING_SYSTEM_HAS_METHOD (no_conversion, convert);
|
|
|
4610
|
|
|
4611 INITIALIZE_DETECTOR (no_conversion);
|
|
|
4612 DETECTOR_HAS_METHOD (no_conversion, detect);
|
|
|
4613 INITIALIZE_DETECTOR_CATEGORY (no_conversion, no_conversion);
|
|
|
4614
|
|
|
4615 INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA (convert_eol,
|
|
|
4616 "convert-eol-coding-system-p");
|
|
|
4617 CODING_SYSTEM_HAS_METHOD (convert_eol, print);
|
|
|
4618 CODING_SYSTEM_HAS_METHOD (convert_eol, convert);
|
|
|
4619 CODING_SYSTEM_HAS_METHOD (convert_eol, getprop);
|
|
|
4620 CODING_SYSTEM_HAS_METHOD (convert_eol, putprop);
|
|
|
4621 CODING_SYSTEM_HAS_METHOD (convert_eol, conversion_end_type);
|
|
|
4622 CODING_SYSTEM_HAS_METHOD (convert_eol, canonicalize_after_coding);
|
|
|
4623 CODING_SYSTEM_HAS_METHOD (convert_eol, init_coding_stream);
|
|
|
4624
|
|
|
4625 INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA (undecided,
|
|
|
4626 "undecided-coding-system-p");
|
|
|
4627 CODING_SYSTEM_HAS_METHOD (undecided, init);
|
|
|
4628 CODING_SYSTEM_HAS_METHOD (undecided, mark);
|
|
|
4629 CODING_SYSTEM_HAS_METHOD (undecided, print);
|
|
|
4630 CODING_SYSTEM_HAS_METHOD (undecided, convert);
|
|
|
4631 CODING_SYSTEM_HAS_METHOD (undecided, putprop);
|
|
|
4632 CODING_SYSTEM_HAS_METHOD (undecided, getprop);
|
|
|
4633 CODING_SYSTEM_HAS_METHOD (undecided, init_coding_stream);
|
|
|
4634 CODING_SYSTEM_HAS_METHOD (undecided, rewind_coding_stream);
|
|
|
4635 CODING_SYSTEM_HAS_METHOD (undecided, finalize_coding_stream);
|
|
|
4636 CODING_SYSTEM_HAS_METHOD (undecided, mark_coding_stream);
|
|
|
4637 CODING_SYSTEM_HAS_METHOD (undecided, canonicalize);
|
|
|
4638 CODING_SYSTEM_HAS_METHOD (undecided, canonicalize_after_coding);
|
|
|
4639
|
|
|
4640 INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA (chain, "chain-coding-system-p");
|
|
|
4641
|
|
|
4642 CODING_SYSTEM_HAS_METHOD (chain, print);
|
|
|
4643 CODING_SYSTEM_HAS_METHOD (chain, canonicalize);
|
|
|
4644 CODING_SYSTEM_HAS_METHOD (chain, init);
|
|
|
4645 CODING_SYSTEM_HAS_METHOD (chain, mark);
|
|
|
4646 CODING_SYSTEM_HAS_METHOD (chain, mark_coding_stream);
|
|
|
4647 CODING_SYSTEM_HAS_METHOD (chain, convert);
|
|
|
4648 CODING_SYSTEM_HAS_METHOD (chain, rewind_coding_stream);
|
|
|
4649 CODING_SYSTEM_HAS_METHOD (chain, finalize_coding_stream);
|
|
|
4650 CODING_SYSTEM_HAS_METHOD (chain, finalize);
|
|
|
4651 CODING_SYSTEM_HAS_METHOD (chain, putprop);
|
|
|
4652 CODING_SYSTEM_HAS_METHOD (chain, getprop);
|
|
|
4653 CODING_SYSTEM_HAS_METHOD (chain, conversion_end_type);
|
|
|
4654 CODING_SYSTEM_HAS_METHOD (chain, canonicalize_after_coding);
|
|
|
4655
|
|
|
4656 #ifdef DEBUG_XEMACS
|
|
|
4657 INITIALIZE_CODING_SYSTEM_TYPE (internal, "internal-coding-system-p");
|
|
|
4658 CODING_SYSTEM_HAS_METHOD (internal, convert);
|
|
|
4659 #endif
|
|
|
4660
|
|
|
4661 #ifdef HAVE_ZLIB
|
|
|
4662 INITIALIZE_CODING_SYSTEM_TYPE_WITH_DATA (gzip, "gzip-coding-system-p");
|
|
|
4663 CODING_SYSTEM_HAS_METHOD (gzip, conversion_end_type);
|
|
|
4664 CODING_SYSTEM_HAS_METHOD (gzip, convert);
|
|
|
4665 CODING_SYSTEM_HAS_METHOD (gzip, init);
|
|
|
4666 CODING_SYSTEM_HAS_METHOD (gzip, print);
|
|
|
4667 CODING_SYSTEM_HAS_METHOD (gzip, init_coding_stream);
|
|
|
4668 CODING_SYSTEM_HAS_METHOD (gzip, rewind_coding_stream);
|
|
|
4669 CODING_SYSTEM_HAS_METHOD (gzip, putprop);
|
|
|
4670 CODING_SYSTEM_HAS_METHOD (gzip, getprop);
|
|
|
4671 #endif
|
|
|
4672 }
|
|
|
4673
|
|
|
4674 void
|
|
|
4675 reinit_coding_system_type_create (void)
|
|
|
4676 {
|
|
|
4677 REINITIALIZE_CODING_SYSTEM_TYPE (no_conversion);
|
|
|
4678 REINITIALIZE_CODING_SYSTEM_TYPE (convert_eol);
|
|
|
4679 REINITIALIZE_CODING_SYSTEM_TYPE (undecided);
|
|
|
4680 REINITIALIZE_CODING_SYSTEM_TYPE (chain);
|
|
|
4681 #if 0
|
|
|
4682 REINITIALIZE_CODING_SYSTEM_TYPE (text_file_wrapper);
|
|
|
4683 #endif /* 0 */
|
|
|
4684 #ifdef DEBUG_XEMACS
|
|
|
4685 REINITIALIZE_CODING_SYSTEM_TYPE (internal);
|
|
|
4686 #endif
|
|
|
4687 #ifdef HAVE_ZLIB
|
|
|
4688 REINITIALIZE_CODING_SYSTEM_TYPE (gzip);
|
|
|
4689 #endif
|
|
|
4690 }
|
|
|
4691
|
|
|
4692 void
|
|
|
4693 reinit_vars_of_file_coding (void)
|
|
|
4694 {
|
|
428
|
4695 }
|
|
|
4696
|
|
|
4697 void
|
|
|
4698 vars_of_file_coding (void)
|
|
|
4699 {
|
|
771
|
4700 reinit_vars_of_file_coding ();
|
|
|
4701
|
|
|
4702 /* We always have file-coding support */
|
|
428
|
4703 Fprovide (intern ("file-coding"));
|
|
|
4704
|
|
|
4705 DEFVAR_LISP ("keyboard-coding-system", &Vkeyboard_coding_system /*
|
|
|
4706 Coding system used for TTY keyboard input.
|
|
|
4707 Not used under a windowing system.
|
|
|
4708 */ );
|
|
|
4709 Vkeyboard_coding_system = Qnil;
|
|
|
4710
|
|
|
4711 DEFVAR_LISP ("terminal-coding-system", &Vterminal_coding_system /*
|
|
|
4712 Coding system used for TTY display output.
|
|
|
4713 Not used under a windowing system.
|
|
|
4714 */ );
|
|
|
4715 Vterminal_coding_system = Qnil;
|
|
|
4716
|
|
|
4717 DEFVAR_LISP ("coding-system-for-read", &Vcoding_system_for_read /*
|
|
440
|
4718 Overriding coding system used when reading from a file or process.
|
|
|
4719 You should bind this variable with `let', but do not set it globally.
|
|
|
4720 If this is non-nil, it specifies the coding system that will be used
|
|
|
4721 to decode input on read operations, such as from a file or process.
|
|
|
4722 It overrides `buffer-file-coding-system-for-read',
|
|
428
|
4723 `insert-file-contents-pre-hook', etc. Use those variables instead of
|
|
440
|
4724 this one for permanent changes to the environment. */ );
|
|
428
|
4725 Vcoding_system_for_read = Qnil;
|
|
|
4726
|
|
|
4727 DEFVAR_LISP ("coding-system-for-write",
|
|
|
4728 &Vcoding_system_for_write /*
|
|
440
|
4729 Overriding coding system used when writing to a file or process.
|
|
|
4730 You should bind this variable with `let', but do not set it globally.
|
|
|
4731 If this is non-nil, it specifies the coding system that will be used
|
|
|
4732 to encode output for write operations, such as to a file or process.
|
|
|
4733 It overrides `buffer-file-coding-system', `write-region-pre-hook', etc.
|
|
|
4734 Use those variables instead of this one for permanent changes to the
|
|
|
4735 environment. */ );
|
|
428
|
4736 Vcoding_system_for_write = Qnil;
|
|
|
4737
|
|
|
4738 DEFVAR_LISP ("file-name-coding-system", &Vfile_name_coding_system /*
|
|
|
4739 Coding system used to convert pathnames when accessing files.
|
|
|
4740 */ );
|
|
|
4741 Vfile_name_coding_system = Qnil;
|
|
|
4742
|
|
|
4743 DEFVAR_BOOL ("enable-multibyte-characters", &enable_multibyte_characters /*
|
|
771
|
4744 Setting this has no effect. It is purely for FSF compatibility.
|
|
428
|
4745 */ );
|
|
|
4746 enable_multibyte_characters = 1;
|
|
771
|
4747
|
|
|
4748 Vchain_canonicalize_hash_table =
|
|
|
4749 make_lisp_hash_table (50, HASH_TABLE_NON_WEAK, HASH_TABLE_EQUAL);
|
|
|
4750 staticpro (&Vchain_canonicalize_hash_table);
|
|
|
4751
|
|
|
4752 #ifdef DEBUG_XEMACS
|
|
|
4753 DEFVAR_LISP ("debug-coding-detection", &Vdebug_coding_detection /*
|
|
|
4754 If non-nil, display debug information about detection operations in progress.
|
|
|
4755 Information is displayed on stderr.
|
|
|
4756 */ );
|
|
|
4757 Vdebug_coding_detection = Qnil;
|
|
|
4758 #endif
|
|
428
|
4759 }
|
|
|
4760
|
|
|
4761 void
|
|
|
4762 complex_vars_of_file_coding (void)
|
|
|
4763 {
|
|
771
|
4764 Fmake_coding_system
|
|
|
4765 (Qconvert_eol_cr, Qconvert_eol,
|
|
|
4766 build_msg_string ("Convert CR to LF"),
|
|
|
4767 nconc2 (list6 (Qdocumentation,
|
|
|
4768 build_msg_string (
|
|
|
4769 "Converts CR (used to mark the end of a line on Macintosh systems) to LF\n"
|
|
|
4770 "(used internally and under Unix to mark the end of a line)."),
|
|
|
4771 Qmnemonic, build_string ("CR->LF"),
|
|
|
4772 Qsubtype, Qcr),
|
|
|
4773 /* VERY IMPORTANT! Tell make-coding-system not to generate
|
|
|
4774 subsidiaries -- it needs the coding systems we're creating
|
|
|
4775 to do so! */
|
|
|
4776 list2 (Qeol_type, Qlf)));
|
|
|
4777
|
|
|
4778 Fmake_coding_system
|
|
|
4779 (Qconvert_eol_lf, Qconvert_eol,
|
|
|
4780 build_msg_string ("Convert LF to LF (do nothing)"),
|
|
|
4781 nconc2 (list6 (Qdocumentation,
|
|
|
4782 build_msg_string (
|
|
|
4783 "Do nothing."),
|
|
|
4784 Qmnemonic, build_string ("LF->LF"),
|
|
|
4785 Qsubtype, Qlf),
|
|
|
4786 /* VERY IMPORTANT! Tell make-coding-system not to generate
|
|
|
4787 subsidiaries -- it needs the coding systems we're creating
|
|
|
4788 to do so! */
|
|
|
4789 list2 (Qeol_type, Qlf)));
|
|
|
4790
|
|
|
4791 Fmake_coding_system
|
|
|
4792 (Qconvert_eol_crlf, Qconvert_eol,
|
|
|
4793 build_msg_string ("Convert CRLF to LF"),
|
|
|
4794 nconc2 (list6 (Qdocumentation,
|
|
|
4795 build_msg_string (
|
|
|
4796 "Converts CR+LF (used to mark the end of a line on Macintosh systems) to LF\n"
|
|
|
4797 "(used internally and under Unix to mark the end of a line)."),
|
|
|
4798 Qmnemonic, build_string ("CRLF->LF"),
|
|
|
4799 Qsubtype, Qcrlf),
|
|
|
4800 /* VERY IMPORTANT! Tell make-coding-system not to generate
|
|
|
4801 subsidiaries -- it needs the coding systems we're creating
|
|
|
4802 to do so! */
|
|
|
4803 list2 (Qeol_type, Qlf)));
|
|
|
4804
|
|
|
4805 Fmake_coding_system
|
|
|
4806 (Qconvert_eol_autodetect, Qconvert_eol,
|
|
|
4807 build_msg_string ("Autodetect EOL type"),
|
|
|
4808 nconc2 (list6 (Qdocumentation,
|
|
|
4809 build_msg_string (
|
|
|
4810 "Autodetect the end-of-line type."),
|
|
|
4811 Qmnemonic, build_string ("Auto-EOL"),
|
|
793
|
4812 Qsubtype, Qnil),
|
|
771
|
4813 /* VERY IMPORTANT! Tell make-coding-system not to generate
|
|
|
4814 subsidiaries -- it needs the coding systems we're creating
|
|
|
4815 to do so! */
|
|
|
4816 list2 (Qeol_type, Qlf)));
|
|
|
4817
|
|
|
4818 Fmake_coding_system
|
|
|
4819 (Qundecided, Qundecided,
|
|
|
4820 build_msg_string ("Undecided (auto-detect)"),
|
|
|
4821 nconc2 (list4 (Qdocumentation,
|
|
|
4822 build_msg_string
|
|
|
4823 ("Automatically detects the correct encoding."),
|
|
|
4824 Qmnemonic, build_string ("Auto")),
|
|
|
4825 list6 (Qdo_eol, Qt, Qdo_coding, Qt,
|
|
|
4826 /* We do EOL detection ourselves so we don't need to be
|
|
|
4827 wrapped in an EOL detector. (It doesn't actually hurt,
|
|
|
4828 though, I don't think.) */
|
|
|
4829 Qeol_type, Qlf)));
|
|
|
4830
|
|
|
4831 Fmake_coding_system
|
|
|
4832 (intern ("undecided-dos"), Qundecided,
|
|
|
4833 build_msg_string ("Undecided (auto-detect) (CRLF)"),
|
|
|
4834 nconc2 (list4 (Qdocumentation,
|
|
|
4835 build_msg_string
|
|
|
4836 ("Automatically detects the correct encoding; EOL type of CRLF forced."),
|
|
|
4837 Qmnemonic, build_string ("Auto")),
|
|
|
4838 list4 (Qdo_coding, Qt,
|
|
|
4839 Qeol_type, Qcrlf)));
|
|
|
4840
|
|
|
4841 Fmake_coding_system
|
|
|
4842 (intern ("undecided-unix"), Qundecided,
|
|
|
4843 build_msg_string ("Undecided (auto-detect) (LF)"),
|
|
|
4844 nconc2 (list4 (Qdocumentation,
|
|
|
4845 build_msg_string
|
|
|
4846 ("Automatically detects the correct encoding; EOL type of LF forced."),
|
|
|
4847 Qmnemonic, build_string ("Auto")),
|
|
|
4848 list4 (Qdo_coding, Qt,
|
|
|
4849 Qeol_type, Qlf)));
|
|
|
4850
|
|
|
4851 Fmake_coding_system
|
|
|
4852 (intern ("undecided-mac"), Qundecided,
|
|
|
4853 build_msg_string ("Undecided (auto-detect) (CR)"),
|
|
|
4854 nconc2 (list4 (Qdocumentation,
|
|
|
4855 build_msg_string
|
|
|
4856 ("Automatically detects the correct encoding; EOL type of CR forced."),
|
|
|
4857 Qmnemonic, build_string ("Auto")),
|
|
|
4858 list4 (Qdo_coding, Qt,
|
|
|
4859 Qeol_type, Qcr)));
|
|
|
4860
|
|
428
|
4861 /* Need to create this here or we're really screwed. */
|
|
|
4862 Fmake_coding_system
|
|
|
4863 (Qraw_text, Qno_conversion,
|
|
771
|
4864 build_msg_string ("Raw Text"),
|
|
|
4865 list4 (Qdocumentation,
|
|
|
4866 build_msg_string ("Raw text converts only line-break codes, and acts otherwise like `binary'."),
|
|
|
4867 Qmnemonic, build_string ("Raw")));
|
|
428
|
4868
|
|
|
4869 Fmake_coding_system
|
|
|
4870 (Qbinary, Qno_conversion,
|
|
771
|
4871 build_msg_string ("Binary"),
|
|
|
4872 list6 (Qdocumentation,
|
|
|
4873 build_msg_string (
|
|
|
4874 "This coding system is as close as it comes to doing no conversion.\n"
|
|
|
4875 "On input, each byte is converted directly into the character\n"
|
|
|
4876 "with the corresponding code -- i.e. from the `ascii', `control-1',\n"
|
|
|
4877 "or `latin-1' character sets. On output, these characters are\n"
|
|
|
4878 "converted back to the corresponding bytes, and other characters\n"
|
|
|
4879 "are converted to the default character, i.e. `~'."),
|
|
|
4880 Qeol_type, Qlf,
|
|
428
|
4881 Qmnemonic, build_string ("Binary")));
|
|
|
4882
|
|
771
|
4883 /* Formerly aliased to raw-text! Completely bogus and not even the same
|
|
|
4884 as FSF Emacs. */
|
|
|
4885 Fdefine_coding_system_alias (Qno_conversion, Qbinary);
|
|
|
4886 Fdefine_coding_system_alias (intern ("no-conversion-unix"),
|
|
|
4887 intern ("raw-text-unix"));
|
|
|
4888 Fdefine_coding_system_alias (intern ("no-conversion-dos"),
|
|
|
4889 intern ("raw-text-dos"));
|
|
|
4890 Fdefine_coding_system_alias (intern ("no-conversion-mac"),
|
|
|
4891 intern ("raw-text-mac"));
|
|
|
4892
|
|
|
4893 /* These four below will get their defaults set correctly in
|
|
|
4894 code-init.el. We init them now so we can handle stuff at dump
|
|
|
4895 time before we get to code-init.el. */
|
|
440
|
4896 Fdefine_coding_system_alias (Qfile_name, Qbinary);
|
|
771
|
4897 Fdefine_coding_system_alias (Qnative, Qfile_name);
|
|
440
|
4898
|
|
|
4899 Fdefine_coding_system_alias (Qterminal, Qbinary);
|
|
|
4900 Fdefine_coding_system_alias (Qkeyboard, Qbinary);
|
|
|
4901
|
|
771
|
4902 Fdefine_coding_system_alias (Qidentity, Qconvert_eol_lf);
|
|
|
4903
|
|
428
|
4904 /* Need this for bootstrapping */
|
|
771
|
4905 coding_category_system[detector_category_no_conversion] =
|
|
428
|
4906 Fget_coding_system (Qraw_text);
|
|
|
4907 }
|
