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0
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1 /* Buffer insertion/deletion and gap motion for XEmacs.
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2 Copyright (C) 1985, 1986, 1991, 1992, 1993, 1994, 1995
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3 Free Software Foundation, Inc.
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4 Copyright (C) 1995 Sun Microsystems, Inc.
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5
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6 This file is part of XEmacs.
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7
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8 XEmacs is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 2, or (at your option) any
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11 later version.
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12
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13 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with XEmacs; see the file COPYING. If not, write to
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20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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21 Boston, MA 02111-1307, USA. */
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22
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23 /* Synched up with: Mule 2.0, FSF 19.30. Diverges significantly. */
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24
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25 /* This file has been Mule-ized. */
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26
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27 /* Overhauled by Ben Wing, December 1994, for Mule implementation. */
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28
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29 /*
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30 There are three possible ways to specify positions in a buffer. All
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31 of these are one-based: the beginning of the buffer is position or
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32 index 1, and 0 is not a valid position.
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33
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34 As a "buffer position" (typedef Bufpos):
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35
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36 This is an index specifying an offset in characters from the
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37 beginning of the buffer. Note that buffer positions are
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38 logically *between* characters, not on a character. The
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39 difference between two buffer positions specifies the number of
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40 characters between those positions. Buffer positions are the
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41 only kind of position externally visible to the user.
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42
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43 As a "byte index" (typedef Bytind):
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44
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45 This is an index over the bytes used to represent the characters
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46 in the buffer. If there is no Mule support, this is identical
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47 to a buffer position, because each character is represented
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48 using one byte. However, with Mule support, many characters
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49 require two or more bytes for their representation, and so a
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50 byte index may be greater than the corresponding buffer
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51 position.
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52
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53 As a "memory index" (typedef Memind):
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54
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55 This is the byte index adjusted for the gap. For positions
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56 before the gap, this is identical to the byte index. For
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57 positions after the gap, this is the byte index plus the gap
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58 size. There are two possible memory indices for the gap
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59 position; the memory index at the beginning of the gap should
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60 always be used, except in code that deals with manipulating the
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61 gap, where both indices may be seen. The address of the
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62 character "at" (i.e. following) a particular position can be
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63 obtained from the formula
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64
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65 buffer_start_address + memory_index(position) - 1
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66
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67 except in the case of characters at the gap position.
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68
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69 Other typedefs:
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70 ===============
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71
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72 Emchar:
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73 -------
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74 This typedef represents a single Emacs character, which can be
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75 ASCII, ISO-8859, or some extended character, as would typically
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76 be used for Kanji. Note that the representation of a character
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77 as an Emchar is *not* the same as the representation of that
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78 same character in a string; thus, you cannot do the standard
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79 C trick of passing a pointer to a character to a function that
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80 expects a string.
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81
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82 An Emchar takes up 19 bits of representation and (for code
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83 compatibility and such) is compatible with an int. This
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84 representation is visible on the Lisp level. The important
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85 characteristics of the Emchar representation are
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86
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87 -- values 0x00 - 0x7f represent ASCII.
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88 -- values 0x80 - 0xff represent the right half of ISO-8859-1.
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89 -- values 0x100 and up represent all other characters.
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90
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91 This means that Emchar values are upwardly compatible with
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92 the standard 8-bit representation of ASCII/ISO-8859-1.
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93
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94 Bufbyte:
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95 --------
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96 The data in a buffer or string is logically made up of Bufbyte
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97 objects, where a Bufbyte takes up the same amount of space as a
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98 char. (It is declared differently, though, to catch invalid
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99 usages.) Strings stored using Bufbytes are said to be in
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100 "internal format". The important characteristics of internal
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101 format are
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102
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103 -- ASCII characters are represented as a single Bufbyte,
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104 in the range 0 - 0x7f.
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105 -- All other characters are represented as a Bufbyte in
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106 the range 0x80 - 0x9f followed by one or more Bufbytes
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107 in the range 0xa0 to 0xff.
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108
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109 This leads to a number of desirable properties:
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110
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111 -- Given the position of the beginning of a character,
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112 you can find the beginning of the next or previous
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113 character in constant time.
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114 -- When searching for a substring or an ASCII character
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115 within the string, you need merely use standard
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116 searching routines.
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117
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118 array of char:
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119 --------------
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120 Strings that go in or out of Emacs are in "external format",
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121 typedef'ed as an array of char or a char *. There is more
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122 than one external format (JIS, EUC, etc.) but they all
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123 have similar properties. They are modal encodings,
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124 which is to say that the meaning of particular bytes is
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125 not fixed but depends on what "mode" the string is currently
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126 in (e.g. bytes in the range 0 - 0x7f might be
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127 interpreted as ASCII, or as Hiragana, or as 2-byte Kanji,
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128 depending on the current mode). The mode starts out in
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129 ASCII/ISO-8859-1 and is switched using escape sequences --
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130 for example, in the JIS encoding, 'ESC $ B' switches to a
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131 mode where pairs of bytes in the range 0 - 0x7f
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132 are interpreted as Kanji characters.
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133
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134 External-formatted data is generally desirable for passing
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135 data between programs because it is upwardly compatible
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136 with standard ASCII/ISO-8859-1 strings and may require
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137 less space than internal encodings such as the one
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138 described above. In addition, some encodings (e.g. JIS)
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139 keep all characters (except the ESC used to switch modes)
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140 in the printing ASCII range 0x20 - 0x7e, which results in
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141 a much higher probability that the data will avoid being
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142 garbled in transmission. Externally-formatted data is
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143 generally not very convenient to work with, however, and
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144 for this reason is usually converted to internal format
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145 before any work is done on the string.
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146
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147 NOTE: filenames need to be in external format so that
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148 ISO-8859-1 characters come out correctly.
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149
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150 Charcount:
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151 ----------
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152 This typedef represents a count of characters, such as
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153 a character offset into a string or the number of
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154 characters between two positions in a buffer. The
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155 difference between two Bufpos's is a Charcount, and
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156 character positions in a string are represented using
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157 a Charcount.
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158
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159 Bytecount:
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160 ----------
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161 Similar to a Charcount but represents a count of bytes.
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162 The difference between two Bytind's is a Bytecount.
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163
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164
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165 Usage of the various representations:
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166 =====================================
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167
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168 Memory indices are used in low-level functions in insdel.c and for
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169 extent endpoints and marker positions. The reason for this is that
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170 this way, the extents and markers don't need to be updated for most
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171 insertions, which merely shrink the gap and don't move any
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172 characters around in memory.
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173
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174 (The beginning-of-gap memory index simplifies insertions w.r.t.
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175 markers, because text usually gets inserted after markers. For
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176 extents, it is merely for consistency, because text can get
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177 inserted either before or after an extent's endpoint depending on
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178 the open/closedness of the endpoint.)
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179
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180 Byte indices are used in other code that needs to be fast,
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181 such as the searching, redisplay, and extent-manipulation code.
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182
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183 Buffer positions are used in all other code. This is because this
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184 representation is easiest to work with (especially since Lisp
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185 code always uses buffer positions), necessitates the fewest
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186 changes to existing code, and is the safest (e.g. if the text gets
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187 shifted underneath a buffer position, it will still point to a
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188 character; if text is shifted under a byte index, it might point
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189 to the middle of a character, which would be bad).
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190
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191 Similarly, Charcounts are used in all code that deals with strings
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192 except for code that needs to be fast, which used Bytecounts.
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193
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194 Strings are always passed around internally using internal format.
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195 Conversions between external format are performed at the time
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196 that the data goes in or out of Emacs.
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197
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198 Working with the various representations:
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199 ========================================= */
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200
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201 #include <config.h>
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202 #include "lisp.h"
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203
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204 #include "buffer.h"
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205 #include "device.h"
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206 #include "frame.h"
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207 #include "extents.h"
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208 #include "insdel.h"
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209 #include "lstream.h"
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210 #include "redisplay.h"
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211
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212 /* We write things this way because it's very important the
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213 MAX_BYTIND_GAP_SIZE_3 is a multiple of 3. (As it happens,
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214 65535 is a multiple of 3, but this may not always be the
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215 case.) */
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216
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217 #define MAX_BUFPOS_GAP_SIZE_3 (65535/3)
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218 #define MAX_BYTIND_GAP_SIZE_3 (3 * MAX_BUFPOS_GAP_SIZE_3)
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219
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220 short three_to_one_table[1 + MAX_BYTIND_GAP_SIZE_3];
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221
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222 /* Various macros modelled along the lines of those in buffer.h.
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223 Purposefully omitted from buffer.h because files other than this
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224 one should not be using them. */
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225
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226 /* Address of beginning of buffer. This is an lvalue because
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227 BUFFER_ALLOC needs it to be. */
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228 #define BUF_BEG_ADDR(buf) ((buf)->text->beg)
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229
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230 /* Set the address of beginning of buffer. */
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231 #define SET_BUF_BEG_ADDR(buf, addr) do { (buf)->text->beg = (addr); } while (0)
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232
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233 /* Gap size. */
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234 #define BUF_GAP_SIZE(buf) ((buf)->text->gap_size + 0)
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235
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236 /* Set gap size. */
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237 #define SET_BUF_GAP_SIZE(buf, value) \
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238 do { (buf)->text->gap_size = (value); } while (0)
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239
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240 /* Gap location. */
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241 #define BI_BUF_GPT(buf) ((buf)->text->gpt + 0)
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242 #define BUF_GPT_ADDR(buf) (BUF_BEG_ADDR (buf) + BI_BUF_GPT (buf) - 1)
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243
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244 /* Set gap location. */
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245 #define SET_BI_BUF_GPT(buf, value) do { (buf)->text->gpt = (value); } while (0)
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246
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247 /* Set end of buffer. */
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248 #define SET_BOTH_BUF_Z(buf, val, bival) \
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249 do \
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250 { \
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251 (buf)->text->z = (bival); \
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252 (buf)->text->bufz = (val); \
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253 } while (0)
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254
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255 # define GAP_CAN_HOLD_SIZE_P(buf, len) (BUF_GAP_SIZE (buf) >= (len))
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256 # define SET_GAP_SENTINEL(buf)
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257 # define BUF_END_SENTINEL_SIZE 0
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258 # define SET_END_SENTINEL(buf)
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259
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260
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261 /************************************************************************/
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262 /* Charcount/Bytecount conversion */
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263 /************************************************************************/
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264
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265 /* Optimization. Do it. Live it. Love it. */
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266
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267 #ifdef ERROR_CHECK_BUFPOS
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268
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269 Bytind
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270 bufpos_to_bytind (struct buffer *buf, Bufpos x)
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271 {
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272 Bytind retval = real_bufpos_to_bytind (buf, x);
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273 ASSERT_VALID_BYTIND_UNSAFE (buf, retval);
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274 return retval;
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275 }
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276
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277 Bufpos
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278 bytind_to_bufpos (struct buffer *buf, Bytind x)
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279 {
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280 ASSERT_VALID_BYTIND_UNSAFE (buf, x);
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281 return real_bytind_to_bufpos (buf, x);
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282 }
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283
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284 #endif /* ERROR_CHECK_BUFPOS */
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285
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286
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287 /************************************************************************/
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288 /* verifying buffer and string positions */
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289 /************************************************************************/
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290
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291 /* Functions below are tagged with either _byte or _char indicating
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292 whether they return byte or character positions. For a buffer,
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293 a character position is a "Bufpos" and a byte position is a "Bytind".
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294 For strings, these are sometimes typed using "Charcount" and
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295 "Bytecount". */
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296
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297 /* Flags for the functions below are:
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298
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299 GB_ALLOW_PAST_ACCESSIBLE
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300
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301 The allowable range for the position is the entire buffer
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302 (BEG and Z), rather than the accessible portion. For strings,
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303 this flag has no effect.
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304
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305 GB_COERCE_RANGE
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306
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307 If the position is outside the allowable range, return
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308 the lower or upper bound of the range, whichever is closer
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309 to the specified position.
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310
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311 GB_NO_ERROR_IF_BAD
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312
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313 If the position is outside the allowable range, return -1.
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314
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315 GB_NEGATIVE_FROM_END
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316
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317 If a value is negative, treat it as an offset from the end.
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318 Only applies to strings.
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319
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320 The following additional flags apply only to the functions
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321 that return ranges:
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322
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323 GB_ALLOW_NIL
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324
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325 Either or both positions can be nil. If FROM is nil,
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326 FROM_OUT will contain the lower bound of the allowed range.
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327 If TO is nil, TO_OUT will contain the upper bound of the
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328 allowed range.
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329
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330 GB_CHECK_ORDER
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331
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332 FROM must contain the lower bound and TO the upper bound
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333 of the range. If the positions are reversed, an error is
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334 signalled.
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335
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336 The following is a combination flag:
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337
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338 GB_HISTORICAL_STRING_BEHAVIOR
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339
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340 Equivalent to (GB_NEGATIVE_FROM_END | GB_ALLOW_NIL).
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341 */
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342
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343 /* Return a buffer position stored in a Lisp_Object. Full
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344 error-checking is done on the position. Flags can be specified to
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345 control the behavior of out-of-range values. The default behavior
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346 is to require that the position is within the accessible part of
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347 the buffer (BEGV and ZV), and to signal an error if the position is
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348 out of range.
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349
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350 */
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351
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352 Bufpos
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353 get_buffer_pos_char (struct buffer *b, Lisp_Object pos, unsigned int flags)
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354 {
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355 Bufpos ind;
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356 Bufpos min_allowed, max_allowed;
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357
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358 CHECK_INT_COERCE_MARKER (pos);
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359 ind = XINT (pos);
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360 min_allowed = (flags & GB_ALLOW_PAST_ACCESSIBLE) ?
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361 BUF_BEG (b) : BUF_BEGV (b);
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362 max_allowed = (flags & GB_ALLOW_PAST_ACCESSIBLE) ?
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363 BUF_Z (b) : BUF_ZV (b);
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364
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365 if (ind < min_allowed || ind > max_allowed)
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366 {
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367 if (flags & GB_COERCE_RANGE)
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368 ind = ind < min_allowed ? min_allowed : max_allowed;
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369 else if (flags & GB_NO_ERROR_IF_BAD)
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370 ind = -1;
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371 else
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372 {
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373 Lisp_Object buffer;
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374 XSETBUFFER (buffer, b);
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375 args_out_of_range (buffer, pos);
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376 }
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377 }
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378
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379 return ind;
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380 }
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381
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382 Bytind
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383 get_buffer_pos_byte (struct buffer *b, Lisp_Object pos, unsigned int flags)
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384 {
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385 Bufpos bpos = get_buffer_pos_char (b, pos, flags);
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386 if (bpos < 0) /* could happen with GB_NO_ERROR_IF_BAD */
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387 return -1;
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388 return bufpos_to_bytind (b, bpos);
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389 }
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390
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391 /* Return a pair of buffer positions representing a range of text,
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392 taken from a pair of Lisp_Objects. Full error-checking is
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393 done on the positions. Flags can be specified to control the
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394 behavior of out-of-range values. The default behavior is to
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395 allow the range bounds to be specified in either order
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396 (however, FROM_OUT will always be the lower bound of the range
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397 and TO_OUT the upper bound),to require that the positions
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398 are within the accessible part of the buffer (BEGV and ZV),
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|
|
399 and to signal an error if the positions are out of range.
|
|
|
400 */
|
|
|
401
|
|
|
402 void
|
|
|
403 get_buffer_range_char (struct buffer *b, Lisp_Object from, Lisp_Object to,
|
|
|
404 Bufpos *from_out, Bufpos *to_out, unsigned int flags)
|
|
|
405 {
|
|
|
406 Bufpos min_allowed, max_allowed;
|
|
|
407
|
|
|
408 min_allowed = (flags & GB_ALLOW_PAST_ACCESSIBLE) ?
|
|
|
409 BUF_BEG (b) : BUF_BEGV (b);
|
|
|
410 max_allowed = (flags & GB_ALLOW_PAST_ACCESSIBLE) ?
|
|
|
411 BUF_Z (b) : BUF_ZV (b);
|
|
|
412
|
|
|
413 if (NILP (from) && (flags & GB_ALLOW_NIL))
|
|
|
414 *from_out = min_allowed;
|
|
|
415 else
|
|
|
416 *from_out = get_buffer_pos_char (b, from, flags | GB_NO_ERROR_IF_BAD);
|
|
|
417
|
|
|
418 if (NILP (to) && (flags & GB_ALLOW_NIL))
|
|
|
419 *to_out = max_allowed;
|
|
|
420 else
|
|
|
421 *to_out = get_buffer_pos_char (b, to, flags | GB_NO_ERROR_IF_BAD);
|
|
|
422
|
|
|
423 if ((*from_out < 0 || *to_out < 0) && !(flags & GB_NO_ERROR_IF_BAD))
|
|
|
424 {
|
|
|
425 Lisp_Object buffer;
|
|
|
426 XSETBUFFER (buffer, b);
|
|
|
427 args_out_of_range_3 (buffer, from, to);
|
|
|
428 }
|
|
|
429
|
|
|
430 if (*from_out >= 0 && *to_out >= 0 && *from_out > *to_out)
|
|
|
431 {
|
|
|
432 if (flags & GB_CHECK_ORDER)
|
|
|
433 signal_simple_error_2 ("start greater than end", from, to);
|
|
|
434 else
|
|
|
435 {
|
|
|
436 Bufpos temp;
|
|
|
437
|
|
|
438 temp = *from_out;
|
|
|
439 *from_out = *to_out;
|
|
|
440 *to_out = temp;
|
|
|
441 }
|
|
|
442 }
|
|
|
443 }
|
|
|
444
|
|
|
445 void
|
|
|
446 get_buffer_range_byte (struct buffer *b, Lisp_Object from, Lisp_Object to,
|
|
|
447 Bytind *from_out, Bytind *to_out, unsigned int flags)
|
|
|
448 {
|
|
|
449 Bufpos s, e;
|
|
|
450
|
|
|
451 get_buffer_range_char (b, from, to, &s, &e, flags);
|
|
|
452 if (s >= 0)
|
|
|
453 *from_out = bufpos_to_bytind (b, s);
|
|
|
454 else /* could happen with GB_NO_ERROR_IF_BAD */
|
|
|
455 *from_out = -1;
|
|
|
456 if (e >= 0)
|
|
|
457 *to_out = bufpos_to_bytind (b, e);
|
|
|
458 else
|
|
|
459 *to_out = -1;
|
|
|
460 }
|
|
|
461
|
|
|
462 static Charcount
|
|
|
463 get_string_pos_char_1 (Lisp_Object string, Lisp_Object pos, unsigned int flags,
|
|
|
464 Charcount known_length)
|
|
|
465 {
|
|
|
466 Charcount ccpos;
|
|
|
467 Charcount min_allowed = 0;
|
|
|
468 Charcount max_allowed = known_length;
|
|
|
469
|
|
|
470 /* Computation of KNOWN_LENGTH is potentially expensive so we pass
|
|
|
471 it in. */
|
|
|
472 CHECK_INT (pos);
|
|
|
473 ccpos = XINT (pos);
|
|
|
474 if (ccpos < 0 && flags & GB_NEGATIVE_FROM_END)
|
|
|
475 ccpos += max_allowed;
|
|
|
476
|
|
|
477 if (ccpos < min_allowed || ccpos > max_allowed)
|
|
|
478 {
|
|
|
479 if (flags & GB_COERCE_RANGE)
|
|
|
480 ccpos = ccpos < min_allowed ? min_allowed : max_allowed;
|
|
|
481 else if (flags & GB_NO_ERROR_IF_BAD)
|
|
|
482 ccpos = -1;
|
|
|
483 else
|
|
|
484 args_out_of_range (string, pos);
|
|
|
485 }
|
|
|
486
|
|
|
487 return ccpos;
|
|
|
488 }
|
|
|
489
|
|
|
490 Charcount
|
|
|
491 get_string_pos_char (Lisp_Object string, Lisp_Object pos, unsigned int flags)
|
|
|
492 {
|
|
|
493 return get_string_pos_char_1 (string, pos, flags,
|
|
|
494 string_char_length (XSTRING (string)));
|
|
|
495 }
|
|
|
496
|
|
|
497 Bytecount
|
|
|
498 get_string_pos_byte (Lisp_Object string, Lisp_Object pos, unsigned int flags)
|
|
|
499 {
|
|
|
500 Charcount ccpos = get_string_pos_char (string, pos, flags);
|
|
|
501 if (ccpos < 0) /* could happen with GB_NO_ERROR_IF_BAD */
|
|
|
502 return -1;
|
|
14
|
503 return charcount_to_bytecount (XSTRING_DATA (string), ccpos);
|
|
0
|
504 }
|
|
|
505
|
|
|
506 void
|
|
|
507 get_string_range_char (Lisp_Object string, Lisp_Object from, Lisp_Object to,
|
|
|
508 Charcount *from_out, Charcount *to_out,
|
|
|
509 unsigned int flags)
|
|
|
510 {
|
|
|
511 Charcount min_allowed = 0;
|
|
|
512 Charcount max_allowed = string_char_length (XSTRING (string));
|
|
|
513
|
|
|
514 if (NILP (from) && (flags & GB_ALLOW_NIL))
|
|
|
515 *from_out = min_allowed;
|
|
|
516 else
|
|
|
517 *from_out = get_string_pos_char_1 (string, from,
|
|
|
518 flags | GB_NO_ERROR_IF_BAD,
|
|
|
519 max_allowed);
|
|
|
520
|
|
|
521 if (NILP (to) && (flags & GB_ALLOW_NIL))
|
|
|
522 *to_out = max_allowed;
|
|
|
523 else
|
|
|
524 *to_out = get_string_pos_char_1 (string, to,
|
|
|
525 flags | GB_NO_ERROR_IF_BAD,
|
|
|
526 max_allowed);
|
|
|
527
|
|
|
528 if ((*from_out < 0 || *to_out < 0) && !(flags & GB_NO_ERROR_IF_BAD))
|
|
|
529 args_out_of_range_3 (string, from, to);
|
|
|
530
|
|
|
531 if (*from_out >= 0 && *to_out >= 0 && *from_out > *to_out)
|
|
|
532 {
|
|
|
533 if (flags & GB_CHECK_ORDER)
|
|
|
534 signal_simple_error_2 ("start greater than end", from, to);
|
|
|
535 else
|
|
|
536 {
|
|
|
537 Bufpos temp;
|
|
|
538
|
|
|
539 temp = *from_out;
|
|
|
540 *from_out = *to_out;
|
|
|
541 *to_out = temp;
|
|
|
542 }
|
|
|
543 }
|
|
|
544 }
|
|
|
545
|
|
|
546 void
|
|
|
547 get_string_range_byte (Lisp_Object string, Lisp_Object from, Lisp_Object to,
|
|
|
548 Bytecount *from_out, Bytecount *to_out,
|
|
|
549 unsigned int flags)
|
|
|
550 {
|
|
|
551 Charcount s, e;
|
|
|
552
|
|
|
553 get_string_range_char (string, from, to, &s, &e, flags);
|
|
|
554 if (s >= 0)
|
|
14
|
555 *from_out = charcount_to_bytecount (XSTRING_DATA (string), s);
|
|
0
|
556 else /* could happen with GB_NO_ERROR_IF_BAD */
|
|
|
557 *from_out = -1;
|
|
|
558 if (e >= 0)
|
|
14
|
559 *to_out = charcount_to_bytecount (XSTRING_DATA (string), e);
|
|
0
|
560 else
|
|
|
561 *to_out = -1;
|
|
|
562
|
|
|
563 }
|
|
|
564
|
|
|
565 Bufpos
|
|
|
566 get_buffer_or_string_pos_char (Lisp_Object object, Lisp_Object pos,
|
|
|
567 unsigned int flags)
|
|
|
568 {
|
|
|
569 if (STRINGP (object))
|
|
|
570 return get_string_pos_char (object, pos, flags);
|
|
|
571 else
|
|
|
572 return get_buffer_pos_char (XBUFFER (object), pos, flags);
|
|
|
573 }
|
|
|
574
|
|
|
575 Bytind
|
|
|
576 get_buffer_or_string_pos_byte (Lisp_Object object, Lisp_Object pos,
|
|
|
577 unsigned int flags)
|
|
|
578 {
|
|
|
579 if (STRINGP (object))
|
|
|
580 return get_string_pos_byte (object, pos, flags);
|
|
|
581 else
|
|
|
582 return get_buffer_pos_byte (XBUFFER (object), pos, flags);
|
|
|
583 }
|
|
|
584
|
|
|
585 void
|
|
|
586 get_buffer_or_string_range_char (Lisp_Object object, Lisp_Object from,
|
|
|
587 Lisp_Object to, Bufpos *from_out,
|
|
|
588 Bufpos *to_out, unsigned int flags)
|
|
|
589 {
|
|
|
590 if (STRINGP (object))
|
|
|
591 get_string_range_char (object, from, to, from_out, to_out, flags);
|
|
|
592 else
|
|
|
593 get_buffer_range_char (XBUFFER (object), from, to, from_out, to_out,
|
|
|
594 flags);
|
|
|
595 }
|
|
|
596
|
|
|
597 void
|
|
|
598 get_buffer_or_string_range_byte (Lisp_Object object, Lisp_Object from,
|
|
|
599 Lisp_Object to, Bytind *from_out,
|
|
|
600 Bytind *to_out, unsigned int flags)
|
|
|
601 {
|
|
|
602 if (STRINGP (object))
|
|
|
603 get_string_range_byte (object, from, to, from_out, to_out, flags);
|
|
|
604 else
|
|
|
605 get_buffer_range_byte (XBUFFER (object), from, to, from_out, to_out,
|
|
|
606 flags);
|
|
|
607 }
|
|
|
608
|
|
|
609 Bufpos
|
|
|
610 buffer_or_string_accessible_begin_char (Lisp_Object object)
|
|
|
611 {
|
|
|
612 if (STRINGP (object))
|
|
|
613 return 0;
|
|
|
614 return BUF_BEGV (XBUFFER (object));
|
|
|
615 }
|
|
|
616
|
|
|
617 Bufpos
|
|
|
618 buffer_or_string_accessible_end_char (Lisp_Object object)
|
|
|
619 {
|
|
|
620 if (STRINGP (object))
|
|
|
621 return string_char_length (XSTRING (object));
|
|
|
622 return BUF_ZV (XBUFFER (object));
|
|
|
623 }
|
|
|
624
|
|
|
625 Bytind
|
|
|
626 buffer_or_string_accessible_begin_byte (Lisp_Object object)
|
|
|
627 {
|
|
|
628 if (STRINGP (object))
|
|
|
629 return 0;
|
|
|
630 return BI_BUF_BEGV (XBUFFER (object));
|
|
|
631 }
|
|
|
632
|
|
|
633 Bytind
|
|
|
634 buffer_or_string_accessible_end_byte (Lisp_Object object)
|
|
|
635 {
|
|
|
636 if (STRINGP (object))
|
|
14
|
637 return XSTRING_LENGTH (object);
|
|
0
|
638 return BI_BUF_ZV (XBUFFER (object));
|
|
|
639 }
|
|
|
640
|
|
|
641 Bufpos
|
|
|
642 buffer_or_string_absolute_begin_char (Lisp_Object object)
|
|
|
643 {
|
|
|
644 if (STRINGP (object))
|
|
|
645 return 0;
|
|
|
646 return BUF_BEG (XBUFFER (object));
|
|
|
647 }
|
|
|
648
|
|
|
649 Bufpos
|
|
|
650 buffer_or_string_absolute_end_char (Lisp_Object object)
|
|
|
651 {
|
|
|
652 if (STRINGP (object))
|
|
|
653 return string_char_length (XSTRING (object));
|
|
|
654 return BUF_Z (XBUFFER (object));
|
|
|
655 }
|
|
|
656
|
|
|
657 Bytind
|
|
|
658 buffer_or_string_absolute_begin_byte (Lisp_Object object)
|
|
|
659 {
|
|
|
660 if (STRINGP (object))
|
|
|
661 return 0;
|
|
|
662 return BI_BUF_BEG (XBUFFER (object));
|
|
|
663 }
|
|
|
664
|
|
|
665 Bytind
|
|
|
666 buffer_or_string_absolute_end_byte (Lisp_Object object)
|
|
|
667 {
|
|
|
668 if (STRINGP (object))
|
|
14
|
669 return XSTRING_LENGTH (object);
|
|
0
|
670 return BI_BUF_Z (XBUFFER (object));
|
|
|
671 }
|
|
|
672
|
|
|
673
|
|
|
674 /************************************************************************/
|
|
|
675 /* point and marker adjustment */
|
|
|
676 /************************************************************************/
|
|
|
677
|
|
|
678 /* just_set_point() is the only place `PT' is an lvalue in all of emacs.
|
|
|
679 This function is called from set_buffer_point(), which is the function
|
|
|
680 that the SET_PT and BUF_SET_PT macros expand into, and from the
|
|
|
681 routines below that insert and delete text. (This is in cases where
|
|
|
682 the point marker logically doesn't move but PT (being a byte index)
|
|
|
683 needs to get adjusted.) */
|
|
|
684
|
|
|
685 /* Set point to a specified value. This is used only when the value
|
|
|
686 of point changes due to an insert or delete; it does not represent
|
|
|
687 a conceptual change in point as a marker. In particular, point is
|
|
|
688 not crossing any interval boundaries, so there's no need to use the
|
|
|
689 usual SET_PT macro. In fact it would be incorrect to do so, because
|
|
|
690 either the old or the new value of point is out of synch with the
|
|
|
691 current set of intervals. */
|
|
|
692
|
|
|
693 /* This gets called more than enough to make the function call
|
|
|
694 overhead a significant factor so we've turned it into a macro. */
|
|
|
695 #define JUST_SET_POINT(buf, bufpos, ind) \
|
|
|
696 do \
|
|
|
697 { \
|
|
|
698 buf->bufpt = (bufpos); \
|
|
|
699 buf->pt = (ind); \
|
|
|
700 } while (0)
|
|
|
701
|
|
|
702 /* Set a buffer's point. */
|
|
|
703
|
|
|
704 void
|
|
|
705 set_buffer_point (struct buffer *buf, Bufpos bufpos, Bytind bytpos)
|
|
|
706 {
|
|
|
707 assert (bytpos >= BI_BUF_BEGV (buf) && bytpos <= BI_BUF_ZV (buf));
|
|
|
708 if (bytpos == BI_BUF_PT (buf))
|
|
|
709 return;
|
|
|
710 JUST_SET_POINT (buf, bufpos, bytpos);
|
|
|
711 MARK_POINT_CHANGED;
|
|
|
712 assert (MARKERP (buf->point_marker));
|
|
|
713 XMARKER (buf->point_marker)->memind =
|
|
|
714 bytind_to_memind (buf, bytpos);
|
|
|
715
|
|
|
716 /* FSF makes sure that PT is not being set within invisible text.
|
|
|
717 However, this is the wrong place for that check. The check
|
|
|
718 should happen only at the next redisplay. */
|
|
|
719
|
|
|
720 /* Some old coder said:
|
|
|
721
|
|
|
722 "If there were to be hooks which were run when point entered/left an
|
|
|
723 extent, this would be the place to put them.
|
|
|
724
|
|
|
725 However, it's probably the case that such hooks should be implemented
|
|
|
726 using a post-command-hook instead, to avoid running the hooks as a
|
|
|
727 result of intermediate motion inside of save-excursions, for example."
|
|
|
728
|
|
|
729 I definitely agree with this. PT gets moved all over the place
|
|
|
730 and it would be a Bad Thing for any hooks to get called, both for
|
|
|
731 the reason above and because many callers are not prepared for
|
|
|
732 a GC within this function. --ben
|
|
|
733 */
|
|
|
734 }
|
|
|
735
|
|
|
736 /* Do the correct marker-like adjustment on MPOS (see below). FROM, TO,
|
|
|
737 and AMOUNT are as in adjust_markers(). If MPOS doesn't need to be
|
|
|
738 adjusted, nothing will happen. */
|
|
|
739 Memind
|
|
|
740 do_marker_adjustment (Memind mpos, Memind from,
|
|
|
741 Memind to, Bytecount amount)
|
|
|
742 {
|
|
|
743 if (amount > 0)
|
|
|
744 {
|
|
|
745 if (mpos > to && mpos < to + amount)
|
|
|
746 mpos = to + amount;
|
|
|
747 }
|
|
|
748 else
|
|
|
749 {
|
|
|
750 if (mpos > from + amount && mpos <= from)
|
|
|
751 mpos = from + amount;
|
|
|
752 }
|
|
|
753 if (mpos > from && mpos <= to)
|
|
|
754 mpos += amount;
|
|
|
755 return mpos;
|
|
|
756 }
|
|
|
757
|
|
|
758 /* Do the following:
|
|
|
759
|
|
|
760 (1) Add `amount' to the position of every marker in the current buffer
|
|
|
761 whose current position is between `from' (exclusive) and `to' (inclusive).
|
|
|
762
|
|
|
763 (2) Also, any markers past the outside of that interval, in the direction
|
|
|
764 of adjustment, are first moved back to the near end of the interval
|
|
|
765 and then adjusted by `amount'.
|
|
|
766
|
|
|
767 This function is called in two different cases: when a region of
|
|
|
768 characters adjacent to the gap is moved, causing the gap to shift
|
|
|
769 to the other side of the region (in this case, `from' and `to'
|
|
|
770 point to the old position of the region and there should be no
|
|
|
771 markers affected by (2) because they would be inside the gap),
|
|
|
772 or when a region of characters adjacent to the gap is wiped out,
|
|
|
773 causing the gap to increase to include the region (in this case,
|
|
|
774 `from' and `to' are the same, both pointing to the boundary
|
|
|
775 between the gap and the deleted region, and there are no markers
|
|
|
776 affected by (1)).
|
|
|
777
|
|
|
778 The reason for the use of exclusive and inclusive is that markers at
|
|
|
779 the gap always sit at the beginning, not at the end.
|
|
|
780 */
|
|
|
781
|
|
|
782 static void
|
|
|
783 adjust_markers (struct buffer *buf, Memind from, Memind to,
|
|
|
784 Bytecount amount)
|
|
|
785 {
|
|
|
786 struct Lisp_Marker *m;
|
|
|
787
|
|
|
788 for (m = BUF_MARKERS (buf); m; m = marker_next (m))
|
|
|
789 m->memind = do_marker_adjustment (m->memind, from, to, amount);
|
|
|
790 }
|
|
|
791
|
|
|
792 /* Adjust markers whose insertion-type is t
|
|
|
793 for an insertion of AMOUNT characters at POS. */
|
|
|
794
|
|
|
795 static void
|
|
|
796 adjust_markers_for_insert (struct buffer *buf, Memind ind, Bytecount amount)
|
|
|
797 {
|
|
|
798 struct Lisp_Marker *m;
|
|
|
799
|
|
|
800 for (m = BUF_MARKERS (buf); m; m = marker_next (m))
|
|
|
801 {
|
|
|
802 if (m->insertion_type && m->memind == ind)
|
|
|
803 m->memind += amount;
|
|
|
804 }
|
|
|
805 }
|
|
|
806
|
|
|
807
|
|
|
808 /************************************************************************/
|
|
|
809 /* Routines for dealing with the gap */
|
|
|
810 /************************************************************************/
|
|
|
811
|
|
|
812 /* XEmacs requires an ANSI C compiler, and it damn well better have a
|
|
|
813 working memmove() */
|
|
|
814 #define GAP_USE_BCOPY
|
|
|
815 #ifdef BCOPY_UPWARD_SAFE
|
|
|
816 # undef BCOPY_UPWARD_SAFE
|
|
|
817 #endif
|
|
|
818 #ifdef BCOPY_DOWNWARD_SAFE
|
|
|
819 # undef BCOPY_DOWNWARD_SAFE
|
|
|
820 #endif
|
|
|
821 #define BCOPY_UPWARD_SAFE 1
|
|
|
822 #define BCOPY_DOWNWARD_SAFE 1
|
|
|
823
|
|
|
824 /* maximum amount of memory moved in a single chunk. Increasing this
|
|
|
825 value improves gap-motion efficiency but decreases QUIT responsiveness
|
|
|
826 time. Was 32000 but today's processors are faster and files are
|
|
|
827 bigger. --ben */
|
|
|
828 #define GAP_MOVE_CHUNK 300000
|
|
|
829
|
|
|
830 /* Move the gap to POS, which is less than the current GPT. */
|
|
|
831
|
|
|
832 static void
|
|
|
833 gap_left (struct buffer *buf, Bytind pos)
|
|
|
834 {
|
|
|
835 Bufbyte *to, *from;
|
|
|
836 Bytecount i;
|
|
|
837 Bytind new_s1;
|
|
|
838
|
|
|
839 from = BUF_GPT_ADDR (buf);
|
|
|
840 to = from + BUF_GAP_SIZE (buf);
|
|
|
841 new_s1 = BI_BUF_GPT (buf);
|
|
|
842
|
|
|
843 /* Now copy the characters. To move the gap down,
|
|
|
844 copy characters up. */
|
|
|
845
|
|
|
846 while (1)
|
|
|
847 {
|
|
|
848 /* I gets number of characters left to copy. */
|
|
|
849 i = new_s1 - pos;
|
|
|
850 if (i == 0)
|
|
|
851 break;
|
|
|
852 /* If a quit is requested, stop copying now.
|
|
|
853 Change POS to be where we have actually moved the gap to. */
|
|
|
854 if (QUITP)
|
|
|
855 {
|
|
|
856 pos = new_s1;
|
|
|
857 break;
|
|
|
858 }
|
|
|
859 /* Move at most GAP_MOVE_CHUNK chars before checking again for a quit. */
|
|
|
860 if (i > GAP_MOVE_CHUNK)
|
|
|
861 i = GAP_MOVE_CHUNK;
|
|
|
862 #ifdef GAP_USE_BCOPY
|
|
|
863 if (i >= 128
|
|
|
864 /* bcopy is safe if the two areas of memory do not overlap
|
|
|
865 or on systems where bcopy is always safe for moving upward. */
|
|
|
866 && (BCOPY_UPWARD_SAFE
|
|
|
867 || to - from >= 128))
|
|
|
868 {
|
|
|
869 /* If overlap is not safe, avoid it by not moving too many
|
|
|
870 characters at once. */
|
|
|
871 if (!BCOPY_UPWARD_SAFE && i > to - from)
|
|
|
872 i = to - from;
|
|
|
873 new_s1 -= i;
|
|
|
874 from -= i, to -= i;
|
|
|
875 memmove (to, from, i);
|
|
|
876 }
|
|
|
877 else
|
|
|
878 #endif
|
|
|
879 {
|
|
|
880 new_s1 -= i;
|
|
|
881 while (--i >= 0)
|
|
|
882 *--to = *--from;
|
|
|
883 }
|
|
|
884 }
|
|
|
885
|
|
|
886 /* Adjust markers, and buffer data structure, to put the gap at POS.
|
|
|
887 POS is where the loop above stopped, which may be what was specified
|
|
|
888 or may be where a quit was detected. */
|
|
|
889 adjust_markers (buf, pos, BI_BUF_GPT (buf), BUF_GAP_SIZE (buf));
|
|
|
890 adjust_extents (make_buffer (buf), pos, BI_BUF_GPT (buf),
|
|
|
891 BUF_GAP_SIZE (buf));
|
|
|
892 SET_BI_BUF_GPT (buf, pos);
|
|
|
893 SET_GAP_SENTINEL (buf);
|
|
|
894 #ifdef ERROR_CHECK_EXTENTS
|
|
|
895 sledgehammer_extent_check (make_buffer (buf));
|
|
|
896 #endif
|
|
|
897 QUIT;
|
|
|
898 }
|
|
|
899
|
|
|
900 static void
|
|
|
901 gap_right (struct buffer *buf, Bytind pos)
|
|
|
902 {
|
|
|
903 Bufbyte *to, *from;
|
|
|
904 Bytecount i;
|
|
|
905 Bytind new_s1;
|
|
|
906
|
|
|
907 to = BUF_GPT_ADDR (buf);
|
|
|
908 from = to + BUF_GAP_SIZE (buf);
|
|
|
909 new_s1 = BI_BUF_GPT (buf);
|
|
|
910
|
|
|
911 /* Now copy the characters. To move the gap up,
|
|
|
912 copy characters down. */
|
|
|
913
|
|
|
914 while (1)
|
|
|
915 {
|
|
|
916 /* I gets number of characters left to copy. */
|
|
|
917 i = pos - new_s1;
|
|
|
918 if (i == 0)
|
|
|
919 break;
|
|
|
920 /* If a quit is requested, stop copying now.
|
|
|
921 Change POS to be where we have actually moved the gap to. */
|
|
|
922 if (QUITP)
|
|
|
923 {
|
|
|
924 pos = new_s1;
|
|
|
925 break;
|
|
|
926 }
|
|
|
927 /* Move at most GAP_MOVE_CHUNK chars before checking again for a quit. */
|
|
|
928 if (i > GAP_MOVE_CHUNK)
|
|
|
929 i = GAP_MOVE_CHUNK;
|
|
|
930 #ifdef GAP_USE_BCOPY
|
|
|
931 if (i >= 128
|
|
|
932 /* bcopy is safe if the two areas of memory do not overlap
|
|
|
933 or on systems where bcopy is always safe for moving downward. */
|
|
|
934 && (BCOPY_DOWNWARD_SAFE
|
|
|
935 || from - to >= 128))
|
|
|
936 {
|
|
|
937 /* If overlap is not safe, avoid it by not moving too many
|
|
|
938 characters at once. */
|
|
|
939 if (!BCOPY_DOWNWARD_SAFE && i > from - to)
|
|
|
940 i = from - to;
|
|
|
941 new_s1 += i;
|
|
|
942 memmove (to, from, i);
|
|
|
943 from += i, to += i;
|
|
|
944 }
|
|
|
945 else
|
|
|
946 #endif
|
|
|
947 {
|
|
|
948 new_s1 += i;
|
|
|
949 while (--i >= 0)
|
|
|
950 *to++ = *from++;
|
|
|
951 }
|
|
|
952 }
|
|
|
953
|
|
|
954 {
|
|
|
955 int gsize = BUF_GAP_SIZE (buf);
|
|
|
956 adjust_markers (buf, BI_BUF_GPT (buf) + gsize, pos + gsize, - gsize);
|
|
|
957 adjust_extents (make_buffer (buf), BI_BUF_GPT (buf) + gsize, pos + gsize,
|
|
|
958 - gsize);
|
|
|
959 SET_BI_BUF_GPT (buf, pos);
|
|
|
960 SET_GAP_SENTINEL (buf);
|
|
|
961 #ifdef ERROR_CHECK_EXTENTS
|
|
|
962 sledgehammer_extent_check (make_buffer (buf));
|
|
|
963 #endif
|
|
|
964 }
|
|
|
965 QUIT;
|
|
|
966 }
|
|
|
967
|
|
|
968 /* Move gap to position `pos'.
|
|
|
969 Note that this can quit! */
|
|
|
970
|
|
|
971 static void
|
|
|
972 move_gap (struct buffer *buf, Bytind pos)
|
|
|
973 {
|
|
|
974 if (! BUF_BEG_ADDR (buf))
|
|
|
975 abort ();
|
|
|
976 if (pos < BI_BUF_GPT (buf))
|
|
|
977 gap_left (buf, pos);
|
|
|
978 else if (pos > BI_BUF_GPT (buf))
|
|
|
979 gap_right (buf, pos);
|
|
|
980 }
|
|
|
981
|
|
|
982 /* Make the gap INCREMENT bytes longer. */
|
|
|
983
|
|
|
984 static void
|
|
|
985 make_gap (struct buffer *buf, Bytecount increment)
|
|
|
986 {
|
|
|
987 Bufbyte *result;
|
|
|
988 Lisp_Object tem;
|
|
|
989 Bytind real_gap_loc;
|
|
|
990 Bytecount old_gap_size;
|
|
|
991
|
|
|
992 /* If we have to get more space, get enough to last a while. We use
|
|
|
993 a geometric progession that saves on realloc space. */
|
|
|
994 increment += 2000 + ((BI_BUF_Z (buf) - BI_BUF_BEG (buf)) / 8);
|
|
|
995
|
|
|
996 /* Don't allow a buffer size that won't fit in an int
|
|
|
997 even if it will fit in a Lisp integer.
|
|
|
998 That won't work because so many places use `int'. */
|
|
|
999
|
|
|
1000 if (BUF_Z (buf) - BUF_BEG (buf) + BUF_GAP_SIZE (buf) + increment
|
|
|
1001 >= ((unsigned) 1 << (min (INTBITS, VALBITS) - 1)))
|
|
|
1002 error ("Buffer exceeds maximum size");
|
|
|
1003
|
|
|
1004 result = BUFFER_REALLOC (buf->text->beg,
|
|
|
1005 BI_BUF_Z (buf) - BI_BUF_BEG (buf) +
|
|
|
1006 BUF_GAP_SIZE (buf) + increment +
|
|
|
1007 BUF_END_SENTINEL_SIZE);
|
|
|
1008 if (result == 0)
|
|
|
1009 memory_full ();
|
|
|
1010 SET_BUF_BEG_ADDR (buf, result);
|
|
|
1011
|
|
|
1012 /* Prevent quitting in move_gap. */
|
|
|
1013 tem = Vinhibit_quit;
|
|
|
1014 Vinhibit_quit = Qt;
|
|
|
1015
|
|
|
1016 real_gap_loc = BI_BUF_GPT (buf);
|
|
|
1017 old_gap_size = BUF_GAP_SIZE (buf);
|
|
|
1018
|
|
|
1019 /* Call the newly allocated space a gap at the end of the whole space. */
|
|
|
1020 SET_BI_BUF_GPT (buf, BI_BUF_Z (buf) + BUF_GAP_SIZE (buf));
|
|
|
1021 SET_BUF_GAP_SIZE (buf, increment);
|
|
|
1022
|
|
|
1023 /* Move the new gap down to be consecutive with the end of the old one.
|
|
|
1024 This adjusts the markers properly too. */
|
|
|
1025 gap_left (buf, real_gap_loc + old_gap_size);
|
|
|
1026
|
|
|
1027 /* Now combine the two into one large gap. */
|
|
|
1028 SET_BUF_GAP_SIZE (buf, BUF_GAP_SIZE (buf) + old_gap_size);
|
|
|
1029 SET_BI_BUF_GPT (buf, real_gap_loc);
|
|
|
1030 SET_GAP_SENTINEL (buf);
|
|
|
1031
|
|
|
1032 /* We changed the total size of the buffer (including gap),
|
|
|
1033 so we need to fix up the end sentinel. */
|
|
|
1034 SET_END_SENTINEL (buf);
|
|
|
1035
|
|
|
1036 Vinhibit_quit = tem;
|
|
|
1037 }
|
|
|
1038
|
|
|
1039
|
|
|
1040 /************************************************************************/
|
|
|
1041 /* Before/after-change processing */
|
|
|
1042 /************************************************************************/
|
|
|
1043
|
|
|
1044 /* Those magic changes ... */
|
|
|
1045
|
|
|
1046 static void
|
|
|
1047 buffer_signal_changed_region (struct buffer *buf, Bufpos start,
|
|
|
1048 Bufpos end)
|
|
|
1049 {
|
|
|
1050 /* The changed region is recorded as the number of unchanged
|
|
|
1051 characters from the beginning and from the end of the
|
|
|
1052 buffer. This obviates much of the need of shifting the
|
|
|
1053 region around to compensate for insertions and deletions.
|
|
|
1054 */
|
|
|
1055 if (buf->changes->begin_unchanged < 0 ||
|
|
|
1056 buf->changes->begin_unchanged > start - BUF_BEG (buf))
|
|
|
1057 buf->changes->begin_unchanged = start - BUF_BEG (buf);
|
|
|
1058 if (buf->changes->end_unchanged < 0 ||
|
|
|
1059 buf->changes->end_unchanged > BUF_Z (buf) - end)
|
|
|
1060 buf->changes->end_unchanged = BUF_Z (buf) - end;
|
|
|
1061 }
|
|
|
1062
|
|
|
1063 void
|
|
|
1064 buffer_extent_signal_changed_region (struct buffer *buf, Bufpos start,
|
|
|
1065 Bufpos end)
|
|
|
1066 {
|
|
|
1067 if (buf->changes->begin_extent_unchanged < 0 ||
|
|
|
1068 buf->changes->begin_extent_unchanged > start - BUF_BEG (buf))
|
|
|
1069 buf->changes->begin_extent_unchanged = start - BUF_BEG (buf);
|
|
|
1070 if (buf->changes->end_extent_unchanged < 0 ||
|
|
|
1071 buf->changes->end_extent_unchanged > BUF_Z (buf) - end)
|
|
|
1072 buf->changes->end_extent_unchanged = BUF_Z (buf) - end;
|
|
|
1073 }
|
|
|
1074
|
|
|
1075 void
|
|
|
1076 buffer_reset_changes (struct buffer *buf)
|
|
|
1077 {
|
|
|
1078 buf->changes->begin_unchanged = -1;
|
|
|
1079 buf->changes->end_unchanged = -1;
|
|
|
1080 buf->changes->begin_extent_unchanged = -1;
|
|
|
1081 buf->changes->end_extent_unchanged = -1;
|
|
|
1082 buf->changes->newline_was_deleted = 0;
|
|
|
1083 }
|
|
|
1084
|
|
|
1085 static void
|
|
|
1086 signal_after_change (struct buffer *buf, Bufpos start, Bufpos orig_end,
|
|
|
1087 Bufpos new_end);
|
|
|
1088
|
|
|
1089 /* Call the after-change-functions according to the changes made so far
|
|
|
1090 and treat all further changes as single until the outermost
|
|
|
1091 multiple change exits. This is called when the outermost multiple
|
|
|
1092 change exits and when someone is trying to make a change that violates
|
|
|
1093 the constraints specified in begin_multiple_change(), typically
|
|
|
1094 when nested multiple-change sessions occur. (There are smarter ways of
|
|
|
1095 dealing with nested multiple changes, but these rarely occur so there's
|
|
|
1096 probably no point in it.) */
|
|
|
1097
|
|
|
1098 /* #### This needs to keep track of what actually changed and only
|
|
|
1099 call the after-change functions on that region. */
|
|
|
1100
|
|
|
1101 static void
|
|
|
1102 cancel_multiple_change (struct buffer *buf)
|
|
|
1103 {
|
|
|
1104 /* This function can GC */
|
|
|
1105 /* Call the after-change-functions except when they've already been
|
|
|
1106 called or when there were no changes made to the buffer at all. */
|
|
|
1107 if (buf->text->changes->mc_begin != 0 &&
|
|
|
1108 buf->text->changes->mc_begin_signaled)
|
|
|
1109 {
|
|
|
1110 Bufpos real_mc_begin = buf->text->changes->mc_begin;
|
|
|
1111 buf->text->changes->mc_begin = 0;
|
|
|
1112
|
|
|
1113 signal_after_change (buf, real_mc_begin, buf->text->changes->mc_orig_end,
|
|
|
1114 buf->text->changes->mc_new_end);
|
|
|
1115 }
|
|
|
1116 else
|
|
|
1117 {
|
|
|
1118 buf->text->changes->mc_begin = 0;
|
|
|
1119 }
|
|
|
1120 }
|
|
|
1121
|
|
|
1122 /* this is an unwind_protect, to ensure that the after-change-functions
|
|
|
1123 get called even in a non-local exit. */
|
|
|
1124
|
|
|
1125 static Lisp_Object
|
|
|
1126 multiple_change_finish_up (Lisp_Object buffer)
|
|
|
1127 {
|
|
|
1128 struct buffer *buf = XBUFFER (buffer);
|
|
|
1129
|
|
|
1130 /* #### I don't know whether or not it should even be possible to
|
|
|
1131 get here with a dead buffer (though given how it is called I can
|
|
|
1132 see how it might be). In any case, there isn't time before 19.14
|
|
|
1133 to find out. */
|
|
|
1134 if (!BUFFER_LIVE_P (buf))
|
|
|
1135 return Qnil;
|
|
|
1136
|
|
|
1137 /* This function can GC */
|
|
|
1138 buf->text->changes->in_multiple_change = 0; /* do this first so that
|
|
|
1139 errors in the after-change
|
|
|
1140 functions don't mess things
|
|
|
1141 up. */
|
|
|
1142 cancel_multiple_change (buf);
|
|
|
1143 return Qnil;
|
|
|
1144 }
|
|
|
1145
|
|
|
1146 /* Call this function when you're about to make a number of buffer changes
|
|
|
1147 that should be considered a single change. (e.g. `replace-match' calls
|
|
|
1148 this.) You need to specify the START and END of the region that is
|
|
|
1149 going to be changed so that the before-change-functions are called
|
|
|
1150 with the correct arguments. The after-change region is calculated
|
|
|
1151 automatically, however, and if changes somehow or other happen outside
|
|
|
1152 of the specified region, that will also be handled correctly.
|
|
|
1153
|
|
|
1154 begin_multiple_change() returns a number (actually a specpdl depth)
|
|
|
1155 that you must pass to end_multiple_change() when you are done. */
|
|
|
1156
|
|
|
1157 int
|
|
|
1158 begin_multiple_change (struct buffer *buf, Bufpos start, Bufpos end)
|
|
|
1159 {
|
|
|
1160 /* This function can GC */
|
|
|
1161 int count = -1;
|
|
|
1162 if (buf->text->changes->in_multiple_change)
|
|
|
1163 {
|
|
|
1164 if (buf->text->changes->mc_begin != 0 &&
|
|
|
1165 (start < buf->text->changes->mc_begin ||
|
|
|
1166 end > buf->text->changes->mc_new_end))
|
|
|
1167 cancel_multiple_change (buf);
|
|
|
1168 }
|
|
|
1169 else
|
|
|
1170 {
|
|
|
1171 Lisp_Object buffer;
|
|
|
1172
|
|
|
1173 buf->text->changes->mc_begin = start;
|
|
|
1174 buf->text->changes->mc_orig_end = buf->text->changes->mc_new_end = end;
|
|
|
1175 buf->text->changes->mc_begin_signaled = 0;
|
|
|
1176 count = specpdl_depth ();
|
|
|
1177 XSETBUFFER (buffer, buf);
|
|
|
1178 record_unwind_protect (multiple_change_finish_up, buffer);
|
|
|
1179 }
|
|
|
1180 buf->text->changes->in_multiple_change++;
|
|
|
1181 /* We don't call before-change-functions until signal_before_change()
|
|
|
1182 is called, in case there is a read-only or other error. */
|
|
|
1183 return count;
|
|
|
1184 }
|
|
|
1185
|
|
|
1186 void
|
|
|
1187 end_multiple_change (struct buffer *buf, int count)
|
|
|
1188 {
|
|
|
1189 assert (buf->text->changes->in_multiple_change > 0);
|
|
|
1190 buf->text->changes->in_multiple_change--;
|
|
|
1191 if (!buf->text->changes->in_multiple_change)
|
|
|
1192 unbind_to (count, Qnil);
|
|
|
1193 }
|
|
|
1194
|
|
|
1195 static int inside_change_hook;
|
|
|
1196
|
|
|
1197 static Lisp_Object
|
|
|
1198 change_function_restore (Lisp_Object buffer)
|
|
|
1199 {
|
|
|
1200 Fset_buffer (buffer);
|
|
|
1201 inside_change_hook = 0;
|
|
|
1202 return Qnil;
|
|
|
1203 }
|
|
|
1204
|
|
|
1205 static int in_first_change;
|
|
|
1206
|
|
|
1207 static Lisp_Object
|
|
|
1208 first_change_hook_restore (Lisp_Object buffer)
|
|
|
1209 {
|
|
|
1210 Fset_buffer (buffer);
|
|
|
1211 in_first_change = 0;
|
|
|
1212 return Qnil;
|
|
|
1213 }
|
|
|
1214
|
|
|
1215 /* Signal an initial modification to the buffer. */
|
|
|
1216
|
|
|
1217 static void
|
|
|
1218 signal_first_change (struct buffer *buf)
|
|
|
1219 {
|
|
|
1220 /* This function can GC */
|
|
|
1221 Lisp_Object buffer;
|
|
48
|
1222 XSETBUFFER (buffer, current_buffer);
|
|
0
|
1223
|
|
|
1224 if (!in_first_change)
|
|
|
1225 {
|
|
|
1226 if (!preparing_for_armageddon &&
|
|
|
1227 !NILP (symbol_value_in_buffer (Qfirst_change_hook, buffer)))
|
|
|
1228 {
|
|
|
1229 int speccount = specpdl_depth ();
|
|
|
1230 record_unwind_protect (first_change_hook_restore, buffer);
|
|
|
1231 set_buffer_internal (buf);
|
|
|
1232 in_first_change = 1;
|
|
|
1233 run_hook (Qfirst_change_hook);
|
|
|
1234 unbind_to (speccount, Qnil);
|
|
|
1235 }
|
|
|
1236 }
|
|
|
1237 }
|
|
|
1238
|
|
|
1239 /* Signal a change to the buffer immediately before it happens.
|
|
|
1240 START and END are the bounds of the text to be changed. */
|
|
|
1241
|
|
|
1242 static void
|
|
|
1243 signal_before_change (struct buffer *buf, Bufpos start, Bufpos end)
|
|
|
1244 {
|
|
|
1245 /* This function can GC */
|
|
|
1246 Lisp_Object buffer;
|
|
|
1247 XSETBUFFER (buffer, buf);
|
|
|
1248
|
|
|
1249 if (!inside_change_hook)
|
|
|
1250 {
|
|
|
1251 /* Are we in a multiple-change session? */
|
|
|
1252 if (buf->text->changes->in_multiple_change &&
|
|
|
1253 buf->text->changes->mc_begin != 0)
|
|
|
1254 {
|
|
|
1255 /* If we're violating the constraints of the session,
|
|
|
1256 call the after-change-functions as necessary for the
|
|
|
1257 changes already made and treat further changes as
|
|
|
1258 single. */
|
|
|
1259 if (start < buf->text->changes->mc_begin ||
|
|
|
1260 end > buf->text->changes->mc_new_end)
|
|
|
1261 cancel_multiple_change (buf);
|
|
|
1262 /* Do nothing if this is not the first change in the session. */
|
|
|
1263 else if (buf->text->changes->mc_begin_signaled)
|
|
|
1264 return;
|
|
|
1265 else
|
|
|
1266 {
|
|
|
1267 /* First time through; call the before-change-functions
|
|
|
1268 specifying the entire region to be changed. (Note that
|
|
|
1269 we didn't call before-change-functions in
|
|
|
1270 begin_multiple_change() because the buffer might be
|
|
|
1271 read-only, etc.) */
|
|
|
1272 start = buf->text->changes->mc_begin;
|
|
|
1273 end = buf->text->changes->mc_new_end;
|
|
|
1274 }
|
|
|
1275 }
|
|
|
1276
|
|
|
1277 /* If buffer is unmodified, run a special hook for that case. */
|
|
|
1278 if (BUF_SAVE_MODIFF (buf) >= BUF_MODIFF (buf))
|
|
|
1279 signal_first_change (buf);
|
|
|
1280
|
|
|
1281 /* Now in any case run the before-change-functions if any. */
|
|
|
1282
|
|
|
1283 if (!preparing_for_armageddon &&
|
|
48
|
1284 !EQ (buffer, Vprin1_to_string_buffer) &&
|
|
0
|
1285 (!NILP (symbol_value_in_buffer (Qbefore_change_functions, buffer)) ||
|
|
|
1286 /* Obsolete, for compatibility */
|
|
|
1287 !NILP (symbol_value_in_buffer (Qbefore_change_function, buffer))))
|
|
|
1288 {
|
|
|
1289 int speccount = specpdl_depth ();
|
|
|
1290 record_unwind_protect (change_function_restore, Fcurrent_buffer ());
|
|
|
1291 set_buffer_internal (buf);
|
|
|
1292 inside_change_hook = 1;
|
|
|
1293 va_run_hook_with_args (Qbefore_change_functions, 2,
|
|
|
1294 make_int (start), make_int (end));
|
|
|
1295 /* Obsolete, for compatibility */
|
|
|
1296 va_run_hook_with_args (Qbefore_change_function, 2,
|
|
|
1297 make_int (start), make_int (end));
|
|
|
1298 unbind_to (speccount, Qnil);
|
|
|
1299 }
|
|
|
1300
|
|
|
1301 /* Only now do we indicate that the before-change-functions have
|
|
|
1302 been called, in case some function throws out. */
|
|
|
1303 buf->text->changes->mc_begin_signaled = 1;
|
|
|
1304 }
|
|
|
1305
|
|
|
1306 /* #### At this point we should map over extents calling
|
|
|
1307 modification-hooks, insert-before-hooks and insert-after-hooks
|
|
|
1308 of relevant extents */
|
|
|
1309 }
|
|
|
1310
|
|
|
1311 /* Signal a change immediately after it happens.
|
|
|
1312 START is the bufpos of the start of the changed text.
|
|
|
1313 ORIG_END is the bufpos of the end of the before-changed text.
|
|
|
1314 NEW_END is the bufpos of the end of the after-changed text.
|
|
|
1315 */
|
|
|
1316
|
|
|
1317 static void
|
|
|
1318 signal_after_change (struct buffer *buf, Bufpos start, Bufpos orig_end,
|
|
|
1319 Bufpos new_end)
|
|
|
1320 {
|
|
|
1321 /* This function can GC */
|
|
|
1322 Lisp_Object buffer;
|
|
|
1323 XSETBUFFER (buffer, buf);
|
|
|
1324
|
|
|
1325 /* always do this. */
|
|
|
1326 buffer_signal_changed_region (buf, start, new_end);
|
|
|
1327 font_lock_maybe_update_syntactic_caches (buf, start, orig_end, new_end);
|
|
|
1328
|
|
|
1329 if (!inside_change_hook)
|
|
|
1330 {
|
|
|
1331 if (buf->text->changes->in_multiple_change &&
|
|
|
1332 buf->text->changes->mc_begin != 0)
|
|
|
1333 {
|
|
|
1334 assert (start >= buf->text->changes->mc_begin &&
|
|
|
1335 start <= buf->text->changes->mc_new_end);
|
|
|
1336 assert (orig_end >= buf->text->changes->mc_begin &&
|
|
|
1337 orig_end <= buf->text->changes->mc_new_end);
|
|
|
1338 buf->text->changes->mc_new_end += new_end - orig_end;
|
|
|
1339 return; /* after-change-functions signalled when all changes done */
|
|
|
1340 }
|
|
|
1341
|
|
|
1342 if (!preparing_for_armageddon &&
|
|
48
|
1343 !EQ (buffer, Vprin1_to_string_buffer) &&
|
|
0
|
1344 (!NILP (symbol_value_in_buffer (Qafter_change_functions, buffer)) ||
|
|
|
1345 /* Obsolete, for compatibility */
|
|
|
1346 !NILP (symbol_value_in_buffer (Qafter_change_function, buffer))))
|
|
|
1347 {
|
|
|
1348 int speccount = specpdl_depth ();
|
|
|
1349 record_unwind_protect (change_function_restore, Fcurrent_buffer ());
|
|
|
1350 set_buffer_internal (buf);
|
|
|
1351 inside_change_hook = 1;
|
|
|
1352 /* The actual after-change functions take slightly
|
|
|
1353 different arguments than what we were passed. */
|
|
|
1354 va_run_hook_with_args (Qafter_change_functions, 3,
|
|
|
1355 make_int (start), make_int (new_end),
|
|
|
1356 make_int (orig_end - start));
|
|
|
1357 /* Obsolete, for compatibility */
|
|
|
1358 va_run_hook_with_args (Qafter_change_function, 3,
|
|
|
1359 make_int (start), make_int (new_end),
|
|
|
1360 make_int (orig_end - start));
|
|
|
1361 unbind_to (speccount, Qnil);
|
|
|
1362 }
|
|
|
1363 }
|
|
|
1364
|
|
|
1365 /* #### At this point we should map over extents calling
|
|
|
1366 some sort of modification hooks of relevant extents */
|
|
|
1367 }
|
|
|
1368
|
|
|
1369 /* Call this if you're about to change the region of BUFFER from START
|
|
|
1370 to END. This checks the read-only properties of the region, calls
|
|
|
1371 the necessary modification hooks, and warns the next redisplay that
|
|
|
1372 it should pay attention to that area. */
|
|
|
1373
|
|
|
1374 static void
|
|
|
1375 prepare_to_modify_buffer (struct buffer *buf, Bufpos start, Bufpos end,
|
|
|
1376 int lockit)
|
|
|
1377 {
|
|
|
1378 /* This function can GC */
|
|
40
|
1379 /* dmoore - This function can also kill the buffer buf, the current
|
|
|
1380 buffer, and do anything it pleases. So if you call it, be
|
|
|
1381 careful. */
|
|
|
1382 Lisp_Object buffer;
|
|
|
1383 struct gcpro gcpro1;
|
|
|
1384
|
|
0
|
1385 barf_if_buffer_read_only (buf, start, end);
|
|
|
1386
|
|
|
1387 /* if this is the first modification, see about locking the buffer's
|
|
|
1388 file */
|
|
40
|
1389 XSETBUFFER (buffer, buf);
|
|
|
1390 GCPRO1 (buffer);
|
|
0
|
1391 if (!NILP (buf->filename) && lockit &&
|
|
|
1392 BUF_SAVE_MODIFF (buf) >= BUF_MODIFF (buf))
|
|
|
1393 {
|
|
|
1394 #ifdef CLASH_DETECTION
|
|
|
1395 if (!NILP (buf->file_truename))
|
|
|
1396 /* Make binding buffer-file-name to nil effective. */
|
|
|
1397 lock_file (buf->file_truename);
|
|
|
1398 #else
|
|
|
1399 /* At least warn if this file has changed on disk since it was visited.*/
|
|
|
1400 if (NILP (Fverify_visited_file_modtime (buffer))
|
|
|
1401 && !NILP (Ffile_exists_p (buf->filename)))
|
|
|
1402 call1_in_buffer (buf, intern ("ask-user-about-supersession-threat"),
|
|
|
1403 buf->filename);
|
|
|
1404 #endif /* not CLASH_DETECTION */
|
|
|
1405 }
|
|
40
|
1406 UNGCPRO;
|
|
|
1407
|
|
|
1408 /* #### dmoore - is this reasonable in case of buf being killed above? */
|
|
|
1409 if (!BUFFER_LIVE_P (buf))
|
|
|
1410 return;
|
|
0
|
1411
|
|
|
1412 signal_before_change (buf, start, end);
|
|
|
1413
|
|
|
1414 #ifdef REGION_CACHE_NEEDS_WORK
|
|
|
1415 if (buf->newline_cache)
|
|
|
1416 invalidate_region_cache (buf,
|
|
|
1417 buf->newline_cache,
|
|
|
1418 start - BUF_BEG (buf), BUF_Z (buf) - end);
|
|
|
1419 if (buf->width_run_cache)
|
|
|
1420 invalidate_region_cache (buf,
|
|
|
1421 buf->width_run_cache,
|
|
|
1422 start - BUF_BEG (buf), BUF_Z (buf) - end);
|
|
|
1423 #endif
|
|
|
1424
|
|
|
1425 #if 0 /* FSFmacs */
|
|
|
1426 Vdeactivate_mark = Qt;
|
|
|
1427 #endif
|
|
|
1428
|
|
|
1429 buf->point_before_scroll = Qnil;
|
|
|
1430
|
|
|
1431 /* BUF_MODIFF (buf)++; -- should be done by callers (insert, delete range)
|
|
|
1432 else record_first_change isn't called */
|
|
|
1433 }
|
|
|
1434
|
|
|
1435
|
|
|
1436 /************************************************************************/
|
|
|
1437 /* Insertion of strings */
|
|
|
1438 /************************************************************************/
|
|
|
1439
|
|
|
1440 void
|
|
|
1441 fixup_internal_substring (CONST Bufbyte *nonreloc, Lisp_Object reloc,
|
|
|
1442 Bytecount offset, Bytecount *len)
|
|
|
1443 {
|
|
|
1444 assert ((nonreloc && NILP (reloc)) || (!nonreloc && STRINGP (reloc)));
|
|
|
1445
|
|
|
1446 if (*len < 0)
|
|
|
1447 {
|
|
|
1448 if (nonreloc)
|
|
|
1449 *len = strlen ((CONST char *) nonreloc) - offset;
|
|
|
1450 else
|
|
14
|
1451 *len = XSTRING_LENGTH (reloc) - offset;
|
|
0
|
1452 }
|
|
|
1453 assert (*len >= 0);
|
|
|
1454 if (STRINGP (reloc))
|
|
|
1455 {
|
|
14
|
1456 assert (offset >= 0 && offset <= XSTRING_LENGTH (reloc));
|
|
|
1457 assert (offset + *len <= XSTRING_LENGTH (reloc));
|
|
0
|
1458 }
|
|
|
1459 }
|
|
|
1460
|
|
|
1461 /* Insert a string into BUF at Bufpos POS. The string data comes
|
|
|
1462 from one of two sources: constant, non-relocatable data (specified
|
|
|
1463 in NONRELOC), or a Lisp string object (specified in RELOC), which
|
|
|
1464 is relocatable and may have extent data that needs to be copied
|
|
|
1465 into the buffer. OFFSET and LENGTH specify the substring of the
|
|
|
1466 data that is actually to be inserted. As a special case, if POS
|
|
|
1467 is -1, insert the string at point and move point to the end of the
|
|
|
1468 string.
|
|
|
1469
|
|
|
1470 Normally, markers at the insertion point end up before the
|
|
|
1471 inserted string. If INSDEL_BEFORE_MARKERS is set in flags, however,
|
|
|
1472 they end up after the string.
|
|
|
1473
|
|
|
1474 INSDEL_NO_LOCKING is kludgy and is used when insert-file-contents is
|
|
|
1475 visiting a new file; it inhibits the locking checks normally done
|
|
|
1476 before modifying a buffer. Similar checks were already done
|
|
|
1477 in the higher-level Lisp functions calling insert-file-contents. */
|
|
|
1478
|
|
|
1479 Charcount
|
|
|
1480 buffer_insert_string_1 (struct buffer *buf, Bufpos pos,
|
|
|
1481 CONST Bufbyte *nonreloc, Lisp_Object reloc,
|
|
|
1482 Bytecount offset, Bytecount length,
|
|
|
1483 int flags)
|
|
|
1484 {
|
|
|
1485 /* This function can GC */
|
|
|
1486 struct gcpro gcpro1;
|
|
|
1487 Bytind ind;
|
|
|
1488 Charcount cclen;
|
|
|
1489 int move_point = 0;
|
|
|
1490
|
|
|
1491 /* Defensive steps just in case a buffer gets deleted and a calling
|
|
|
1492 function doesn't notice it. */
|
|
|
1493 if (!BUFFER_LIVE_P (buf))
|
|
|
1494 return 0;
|
|
|
1495
|
|
|
1496 fixup_internal_substring (nonreloc, reloc, offset, &length);
|
|
|
1497
|
|
|
1498 if (pos == -1)
|
|
|
1499 {
|
|
|
1500 pos = BUF_PT (buf);
|
|
|
1501 move_point = 1;
|
|
|
1502 }
|
|
|
1503
|
|
|
1504 #ifdef I18N3
|
|
|
1505 /* #### See the comment in print_internal(). If this buffer is marked
|
|
|
1506 as translatable, then Fgettext() should be called on obj if it
|
|
|
1507 is a string. */
|
|
|
1508 #endif
|
|
|
1509
|
|
|
1510 /* Make sure that point-max won't exceed the size of an emacs int. */
|
|
|
1511 {
|
|
|
1512 Lisp_Object temp;
|
|
|
1513
|
|
|
1514 XSETINT (temp, (int) (length + BUF_Z (buf)));
|
|
|
1515 if ((int) (length + BUF_Z (buf)) != XINT (temp))
|
|
|
1516 error ("maximum buffer size exceeded");
|
|
|
1517 }
|
|
|
1518
|
|
|
1519 /* theoretically not necessary -- caller should GCPRO */
|
|
|
1520 GCPRO1 (reloc);
|
|
|
1521
|
|
|
1522 prepare_to_modify_buffer (buf, pos, pos, !(flags & INSDEL_NO_LOCKING));
|
|
|
1523
|
|
|
1524 /* Defensive steps in case the before-change-functions fuck around */
|
|
|
1525 if (!BUFFER_LIVE_P (buf))
|
|
|
1526 {
|
|
|
1527 UNGCPRO;
|
|
|
1528 /* Bad bad pre-change function. */
|
|
|
1529 return 0;
|
|
|
1530 }
|
|
|
1531
|
|
|
1532 /* Make args be valid again. prepare_to_modify_buffer() might have
|
|
|
1533 modified the buffer. */
|
|
|
1534 if (pos < BUF_BEGV (buf))
|
|
|
1535 pos = BUF_BEGV (buf);
|
|
|
1536 if (pos > BUF_ZV (buf))
|
|
|
1537 pos = BUF_ZV (buf);
|
|
|
1538
|
|
|
1539 /* string may have been relocated up to this point */
|
|
|
1540 if (STRINGP (reloc))
|
|
14
|
1541 nonreloc = XSTRING_DATA (reloc);
|
|
0
|
1542
|
|
|
1543 ind = bufpos_to_bytind (buf, pos);
|
|
|
1544 cclen = bytecount_to_charcount (nonreloc + offset, length);
|
|
|
1545
|
|
|
1546 if (ind != BI_BUF_GPT (buf))
|
|
|
1547 /* #### if debug-on-quit is invoked and the user changes the
|
|
|
1548 buffer, bad things can happen. This is a rampant problem
|
|
|
1549 in Emacs. */
|
|
|
1550 move_gap (buf, ind); /* may QUIT */
|
|
|
1551 if (! GAP_CAN_HOLD_SIZE_P (buf, length))
|
|
|
1552 make_gap (buf, length - BUF_GAP_SIZE (buf));
|
|
|
1553
|
|
|
1554 record_insert (buf, pos, cclen);
|
|
|
1555 BUF_MODIFF (buf)++;
|
|
|
1556 MARK_BUFFERS_CHANGED;
|
|
|
1557
|
|
|
1558 /* string may have been relocated up to this point */
|
|
|
1559 if (STRINGP (reloc))
|
|
14
|
1560 nonreloc = XSTRING_DATA (reloc);
|
|
0
|
1561
|
|
|
1562 memcpy (BUF_GPT_ADDR (buf), nonreloc + offset, length);
|
|
|
1563
|
|
|
1564 SET_BUF_GAP_SIZE (buf, BUF_GAP_SIZE (buf) - length);
|
|
|
1565 SET_BI_BUF_GPT (buf, BI_BUF_GPT (buf) + length);
|
|
|
1566 SET_BOTH_BUF_ZV (buf, BUF_ZV (buf) + cclen, BI_BUF_ZV (buf) + length);
|
|
|
1567 SET_BOTH_BUF_Z (buf, BUF_Z (buf) + cclen, BI_BUF_Z (buf) + length);
|
|
|
1568 SET_GAP_SENTINEL (buf);
|
|
|
1569
|
|
|
1570 process_extents_for_insertion (make_buffer (buf), ind, length);
|
|
|
1571 /* We know the gap is at IND so the cast is OK. */
|
|
|
1572 adjust_markers_for_insert (buf, (Memind) ind, length);
|
|
|
1573
|
|
|
1574 /* Point logically doesn't move, but may need to be adjusted because
|
|
|
1575 it's a byte index. point-marker doesn't change because it's a
|
|
|
1576 memory index. */
|
|
|
1577 if (BI_BUF_PT (buf) > ind)
|
|
|
1578 JUST_SET_POINT (buf, BUF_PT (buf) + cclen, BI_BUF_PT (buf) + length);
|
|
|
1579
|
|
|
1580 /* Well, point might move. */
|
|
|
1581 if (move_point)
|
|
|
1582 BI_BUF_SET_PT (buf, ind + length);
|
|
|
1583
|
|
|
1584 if (STRINGP (reloc))
|
|
|
1585 splice_in_string_extents (reloc, buf, ind, length, offset);
|
|
|
1586
|
|
|
1587 if (flags & INSDEL_BEFORE_MARKERS)
|
|
|
1588 {
|
|
|
1589 /* ind - 1 is correct because the FROM argument is exclusive.
|
|
|
1590 I formerly used DEC_BYTIND() but that caused problems at the
|
|
|
1591 beginning of the buffer. */
|
|
|
1592 adjust_markers (buf, ind - 1, ind, length);
|
|
|
1593 }
|
|
|
1594
|
|
|
1595 signal_after_change (buf, pos, pos, pos + cclen);
|
|
|
1596
|
|
|
1597 UNGCPRO;
|
|
|
1598
|
|
|
1599 return cclen;
|
|
|
1600 }
|
|
|
1601
|
|
|
1602
|
|
|
1603 /* The following functions are interfaces onto the above function,
|
|
|
1604 for inserting particular sorts of data. In all the functions,
|
|
|
1605 BUF and POS specify the buffer and location where the insertion is
|
|
|
1606 to take place. (If POS is -1, text is inserted at point and point
|
|
|
1607 moves forward past the text.) FLAGS is as above. */
|
|
|
1608
|
|
|
1609 Charcount
|
|
|
1610 buffer_insert_raw_string_1 (struct buffer *buf, Bufpos pos,
|
|
|
1611 CONST Bufbyte *nonreloc, Bytecount length,
|
|
|
1612 int flags)
|
|
|
1613 {
|
|
|
1614 /* This function can GC */
|
|
|
1615 return buffer_insert_string_1 (buf, pos, nonreloc, Qnil, 0, length,
|
|
|
1616 flags);
|
|
|
1617 }
|
|
|
1618
|
|
|
1619 Charcount
|
|
|
1620 buffer_insert_lisp_string_1 (struct buffer *buf, Bufpos pos, Lisp_Object str,
|
|
|
1621 int flags)
|
|
|
1622 {
|
|
|
1623 /* This function can GC */
|
|
|
1624 assert (STRINGP (str));
|
|
|
1625 return buffer_insert_string_1 (buf, pos, 0, str, 0,
|
|
14
|
1626 XSTRING_LENGTH (str),
|
|
0
|
1627 flags);
|
|
|
1628 }
|
|
|
1629
|
|
|
1630 /* Insert the null-terminated string S (in external format). */
|
|
|
1631
|
|
|
1632 Charcount
|
|
|
1633 buffer_insert_c_string_1 (struct buffer *buf, Bufpos pos, CONST char *s,
|
|
|
1634 int flags)
|
|
|
1635 {
|
|
|
1636 /* This function can GC */
|
|
|
1637
|
|
|
1638 CONST char *translated = GETTEXT (s);
|
|
|
1639 return buffer_insert_string_1 (buf, pos, (CONST Bufbyte *) translated, Qnil,
|
|
|
1640 0, strlen (translated), flags);
|
|
|
1641 }
|
|
|
1642
|
|
|
1643 Charcount
|
|
|
1644 buffer_insert_emacs_char_1 (struct buffer *buf, Bufpos pos, Emchar ch,
|
|
|
1645 int flags)
|
|
|
1646 {
|
|
|
1647 /* This function can GC */
|
|
|
1648 Bufbyte str[MAX_EMCHAR_LEN];
|
|
|
1649 Bytecount len;
|
|
|
1650
|
|
|
1651 len = set_charptr_emchar (str, ch);
|
|
|
1652 return buffer_insert_string_1 (buf, pos, str, Qnil, 0, len, flags);
|
|
|
1653 }
|
|
|
1654
|
|
|
1655 Charcount
|
|
|
1656 buffer_insert_c_char_1 (struct buffer *buf, Bufpos pos, char c,
|
|
|
1657 int flags)
|
|
|
1658 {
|
|
|
1659 /* This function can GC */
|
|
|
1660 return buffer_insert_emacs_char_1 (buf, pos, (Emchar) (unsigned char) c,
|
|
|
1661 flags);
|
|
|
1662 }
|
|
|
1663
|
|
|
1664 Charcount
|
|
|
1665 buffer_insert_from_buffer_1 (struct buffer *buf, Bufpos pos,
|
|
|
1666 struct buffer *buf2, Bufpos pos2,
|
|
|
1667 Charcount length, int flags)
|
|
|
1668 {
|
|
|
1669 /* This function can GC */
|
|
|
1670 Lisp_Object str = make_string_from_buffer (buf2, pos2, length);
|
|
|
1671 return buffer_insert_string_1 (buf, pos, 0, str, 0,
|
|
14
|
1672 XSTRING_LENGTH (str), flags);
|
|
0
|
1673 }
|
|
|
1674
|
|
|
1675
|
|
|
1676 /************************************************************************/
|
|
|
1677 /* Deletion of ranges */
|
|
|
1678 /************************************************************************/
|
|
|
1679
|
|
|
1680 /* Delete characters in buffer from FROM up to (but not including) TO. */
|
|
|
1681
|
|
|
1682 void
|
|
|
1683 buffer_delete_range (struct buffer *buf, Bufpos from, Bufpos to, int flags)
|
|
|
1684 {
|
|
|
1685 /* This function can GC */
|
|
|
1686 Charcount numdel;
|
|
|
1687 Bytind bi_from, bi_to;
|
|
|
1688 Bytecount bc_numdel;
|
|
|
1689 int shortage;
|
|
|
1690 Lisp_Object bufobj = Qnil;
|
|
|
1691
|
|
|
1692 /* Defensive steps just in case a buffer gets deleted and a calling
|
|
|
1693 function doesn't notice it. */
|
|
|
1694 if (!BUFFER_LIVE_P (buf))
|
|
|
1695 return;
|
|
|
1696
|
|
|
1697 /* Make args be valid */
|
|
|
1698 if (from < BUF_BEGV (buf))
|
|
|
1699 from = BUF_BEGV (buf);
|
|
|
1700 if (to > BUF_ZV (buf))
|
|
|
1701 to = BUF_ZV (buf);
|
|
|
1702 if ((numdel = to - from) <= 0)
|
|
|
1703 return;
|
|
|
1704
|
|
|
1705 prepare_to_modify_buffer (buf, from, to, !(flags & INSDEL_NO_LOCKING));
|
|
|
1706
|
|
|
1707 /* Defensive steps in case the before-change-functions fuck around */
|
|
|
1708 if (!BUFFER_LIVE_P (buf))
|
|
|
1709 /* Bad bad pre-change function. */
|
|
|
1710 return;
|
|
|
1711
|
|
|
1712 /* Make args be valid again. prepare_to_modify_buffer() might have
|
|
|
1713 modified the buffer. */
|
|
|
1714 if (from < BUF_BEGV (buf))
|
|
|
1715 from = BUF_BEGV (buf);
|
|
|
1716 if (to > BUF_ZV (buf))
|
|
|
1717 to = BUF_ZV (buf);
|
|
|
1718 if ((numdel = to - from) <= 0)
|
|
|
1719 return;
|
|
|
1720
|
|
|
1721 XSETBUFFER (bufobj, buf);
|
|
|
1722
|
|
|
1723 /* Redisplay needs to know if a newline was in the deleted region.
|
|
|
1724 If we've already marked the changed region as having a deleted
|
|
|
1725 newline there is no use in performing the check. */
|
|
|
1726 if (!buf->changes->newline_was_deleted)
|
|
|
1727 {
|
|
|
1728 scan_buffer (buf, '\n', from, to, 1, &shortage, 1);
|
|
|
1729 if (!shortage)
|
|
|
1730 buf->changes->newline_was_deleted = 1;
|
|
|
1731 }
|
|
|
1732
|
|
|
1733 bi_from = bufpos_to_bytind (buf, from);
|
|
|
1734 bi_to = bufpos_to_bytind (buf, to);
|
|
|
1735 bc_numdel = bi_to - bi_from;
|
|
|
1736
|
|
|
1737 /* Make sure the gap is somewhere in or next to what we are deleting. */
|
|
|
1738 if (bi_to < BI_BUF_GPT (buf))
|
|
|
1739 gap_left (buf, bi_to);
|
|
|
1740 if (bi_from > BI_BUF_GPT (buf))
|
|
|
1741 gap_right (buf, bi_from);
|
|
|
1742
|
|
|
1743 record_delete (buf, from, numdel);
|
|
|
1744 BUF_MODIFF (buf)++;
|
|
|
1745 MARK_BUFFERS_CHANGED;
|
|
|
1746
|
|
|
1747 /* Relocate point as if it were a marker. */
|
|
|
1748 if (bi_from < BI_BUF_PT (buf))
|
|
|
1749 {
|
|
|
1750 if (BI_BUF_PT (buf) < bi_to)
|
|
|
1751 JUST_SET_POINT (buf, from, bi_from);
|
|
|
1752 else
|
|
|
1753 JUST_SET_POINT (buf, BUF_PT (buf) - numdel,
|
|
|
1754 BI_BUF_PT (buf) - bc_numdel);
|
|
|
1755 }
|
|
|
1756
|
|
|
1757 /* Detach any extents that are completely within the range [FROM, TO],
|
|
|
1758 if the extents are detachable.
|
|
|
1759
|
|
|
1760 This must come AFTER record_delete(), so that the appropriate extents
|
|
|
1761 will be present to be recorded, and BEFORE the gap size is increased,
|
|
|
1762 as otherwise we will be confused about where the extents end. */
|
|
|
1763 process_extents_for_deletion (bufobj, bi_from, bi_to, 0);
|
|
|
1764
|
|
|
1765 /* Relocate all markers pointing into the new, larger gap
|
|
|
1766 to point at the end of the text before the gap. */
|
|
|
1767 adjust_markers (buf,
|
|
|
1768 (bi_to + BUF_GAP_SIZE (buf)),
|
|
|
1769 (bi_to + BUF_GAP_SIZE (buf)),
|
|
|
1770 (- bc_numdel - BUF_GAP_SIZE (buf)));
|
|
|
1771
|
|
|
1772 /* Relocate any extent endpoints just like markers. */
|
|
|
1773 adjust_extents_for_deletion (bufobj, bi_from, bi_to, BUF_GAP_SIZE (buf),
|
|
|
1774 bc_numdel);
|
|
|
1775
|
|
|
1776 SET_BUF_GAP_SIZE (buf, BUF_GAP_SIZE (buf) + bc_numdel);
|
|
|
1777 SET_BOTH_BUF_ZV (buf, BUF_ZV (buf) - numdel, BI_BUF_ZV (buf) - bc_numdel);
|
|
|
1778 SET_BOTH_BUF_Z (buf, BUF_Z (buf) - numdel, BI_BUF_Z (buf) - bc_numdel);
|
|
|
1779 SET_BI_BUF_GPT (buf, bi_from);
|
|
|
1780 SET_GAP_SENTINEL (buf);
|
|
|
1781
|
|
|
1782 #ifdef ERROR_CHECK_EXTENTS
|
|
|
1783 sledgehammer_extent_check (bufobj);
|
|
|
1784 #endif
|
|
|
1785
|
|
|
1786 signal_after_change (buf, from, to, from);
|
|
|
1787 }
|
|
|
1788
|
|
|
1789
|
|
|
1790 /************************************************************************/
|
|
|
1791 /* Replacement of characters */
|
|
|
1792 /************************************************************************/
|
|
|
1793
|
|
|
1794 /* Replace the character at POS in buffer B with CH. */
|
|
|
1795
|
|
|
1796 void
|
|
|
1797 buffer_replace_char (struct buffer *b, Bufpos pos, Emchar ch,
|
|
|
1798 int not_real_change, int force_lock_check)
|
|
|
1799 {
|
|
|
1800 /* This function can GC */
|
|
|
1801 Bufbyte curstr[MAX_EMCHAR_LEN];
|
|
|
1802 Bufbyte newstr[MAX_EMCHAR_LEN];
|
|
|
1803 Bytecount curlen, newlen;
|
|
|
1804
|
|
|
1805 /* Defensive steps just in case a buffer gets deleted and a calling
|
|
|
1806 function doesn't notice it. */
|
|
|
1807 if (!BUFFER_LIVE_P (b))
|
|
|
1808 return;
|
|
|
1809
|
|
|
1810 curlen = BUF_CHARPTR_COPY_CHAR (b, pos, curstr);
|
|
|
1811 newlen = set_charptr_emchar (newstr, ch);
|
|
|
1812
|
|
|
1813 if (curlen == newlen)
|
|
|
1814 {
|
|
|
1815 /* then we can just replace the text. */
|
|
|
1816 prepare_to_modify_buffer (b, pos, pos + 1,
|
|
|
1817 !not_real_change || force_lock_check);
|
|
|
1818 /* Defensive steps in case the before-change-functions fuck around */
|
|
|
1819 if (!BUFFER_LIVE_P (b))
|
|
|
1820 /* Bad bad pre-change function. */
|
|
|
1821 return;
|
|
|
1822
|
|
|
1823 /* Make args be valid again. prepare_to_modify_buffer() might have
|
|
|
1824 modified the buffer. */
|
|
|
1825 if (pos < BUF_BEGV (b))
|
|
|
1826 pos = BUF_BEGV (b);
|
|
|
1827 if (pos >= BUF_ZV (b))
|
|
|
1828 pos = BUF_ZV (b) - 1;
|
|
|
1829 if (pos < BUF_BEGV (b))
|
|
|
1830 /* no more characters in buffer! */
|
|
|
1831 return;
|
|
|
1832
|
|
|
1833 if (BUF_FETCH_CHAR (b, pos) == '\n')
|
|
|
1834 b->changes->newline_was_deleted = 1;
|
|
|
1835 MARK_BUFFERS_CHANGED;
|
|
|
1836 if (!not_real_change)
|
|
|
1837 {
|
|
|
1838 record_change (b, pos, 1);
|
|
|
1839 BUF_MODIFF (b)++;
|
|
|
1840 }
|
|
|
1841 memcpy (BUF_BYTE_ADDRESS (b, pos), newstr, newlen);
|
|
|
1842 signal_after_change (b, pos, pos + 1, pos + 1);
|
|
|
1843 }
|
|
|
1844 else
|
|
|
1845 {
|
|
|
1846 /* must implement as deletion followed by insertion. */
|
|
|
1847 buffer_delete_range (b, pos, pos + 1, 0);
|
|
|
1848 /* Defensive steps in case the before-change-functions fuck around */
|
|
|
1849 if (!BUFFER_LIVE_P (b))
|
|
|
1850 /* Bad bad pre-change function. */
|
|
|
1851 return;
|
|
|
1852
|
|
|
1853 /* Make args be valid again. prepare_to_modify_buffer() might have
|
|
|
1854 modified the buffer. */
|
|
|
1855 if (pos < BUF_BEGV (b))
|
|
|
1856 pos = BUF_BEGV (b);
|
|
|
1857 if (pos >= BUF_ZV (b))
|
|
|
1858 pos = BUF_ZV (b) - 1;
|
|
|
1859 if (pos < BUF_BEGV (b))
|
|
|
1860 /* no more characters in buffer! */
|
|
|
1861 return;
|
|
|
1862 buffer_insert_string_1 (b, pos, newstr, Qnil, 0, newlen, 0);
|
|
|
1863 }
|
|
|
1864 }
|
|
|
1865
|
|
|
1866
|
|
|
1867 /************************************************************************/
|
|
|
1868 /* Other functions */
|
|
|
1869 /************************************************************************/
|
|
|
1870
|
|
|
1871 /* Make a string from a buffer. This needs to take into account the gap,
|
|
|
1872 and add any necessary extents from the buffer. */
|
|
|
1873
|
|
|
1874 Lisp_Object
|
|
|
1875 make_string_from_buffer (struct buffer *buf, Bufpos pos, Charcount length)
|
|
|
1876 {
|
|
|
1877 /* This function can GC */
|
|
|
1878 Lisp_Object val;
|
|
|
1879 struct gcpro gcpro1;
|
|
|
1880 Bytind bi_ind;
|
|
|
1881 Bytecount bi_len;
|
|
|
1882
|
|
|
1883 bi_ind = bufpos_to_bytind (buf, pos);
|
|
|
1884 bi_len = bufpos_to_bytind (buf, pos + length) - bi_ind;
|
|
|
1885
|
|
|
1886 val = make_uninit_string (bi_len);
|
|
|
1887 GCPRO1 (val);
|
|
|
1888
|
|
|
1889 add_string_extents (val, buf, bi_ind, bi_len);
|
|
|
1890
|
|
|
1891 {
|
|
|
1892 Bytecount len1 = BI_BUF_GPT (buf) - bi_ind;
|
|
|
1893 Bufbyte *start1 = BI_BUF_BYTE_ADDRESS (buf, bi_ind);
|
|
14
|
1894 Bufbyte *dest = XSTRING_DATA (val);
|
|
0
|
1895
|
|
|
1896 if (len1 < 0)
|
|
|
1897 {
|
|
|
1898 /* Completely after gap */
|
|
|
1899 memcpy (dest, start1, bi_len);
|
|
|
1900 }
|
|
|
1901 else if (bi_len <= len1)
|
|
|
1902 {
|
|
|
1903 /* Completely before gap */
|
|
|
1904 memcpy (dest, start1, bi_len);
|
|
|
1905 }
|
|
|
1906 else
|
|
|
1907 {
|
|
|
1908 /* Spans gap */
|
|
|
1909 Bytind pos2 = bi_ind + len1;
|
|
|
1910 Bufbyte *start2 = BI_BUF_BYTE_ADDRESS (buf, pos2);
|
|
|
1911
|
|
|
1912 memcpy (dest, start1, len1);
|
|
|
1913 memcpy (dest + len1, start2, bi_len - len1);
|
|
|
1914 }
|
|
|
1915 }
|
|
|
1916
|
|
|
1917 UNGCPRO;
|
|
|
1918 return val;
|
|
|
1919 }
|
|
|
1920
|
|
|
1921 void
|
|
|
1922 barf_if_buffer_read_only (struct buffer *buf, Bufpos from, Bufpos to)
|
|
|
1923 {
|
|
|
1924 Lisp_Object buffer = Qnil;
|
|
|
1925 Lisp_Object iro;
|
|
|
1926
|
|
|
1927 XSETBUFFER (buffer, buf);
|
|
|
1928 back:
|
|
|
1929 iro = (buf == current_buffer ? Vinhibit_read_only :
|
|
|
1930 symbol_value_in_buffer (Qinhibit_read_only, buffer));
|
|
|
1931 if (!NILP (iro) && !CONSP (iro))
|
|
|
1932 return;
|
|
|
1933 if (NILP (iro) && !NILP (buf->read_only))
|
|
|
1934 {
|
|
|
1935 Fsignal (Qbuffer_read_only, (list1 (buffer)));
|
|
|
1936 goto back;
|
|
|
1937 }
|
|
|
1938 if (from > 0)
|
|
|
1939 {
|
|
|
1940 if (to < 0)
|
|
|
1941 to = from;
|
|
|
1942 verify_extent_modification (buffer,
|
|
|
1943 bufpos_to_bytind (buf, from),
|
|
|
1944 bufpos_to_bytind (buf, to),
|
|
|
1945 iro);
|
|
|
1946 }
|
|
|
1947 }
|
|
|
1948
|
|
|
1949 void
|
|
|
1950 find_charsets_in_bufbyte_string (unsigned char *charsets, CONST Bufbyte *str,
|
|
|
1951 Bytecount len)
|
|
|
1952 {
|
|
|
1953 /* Telescope this. */
|
|
|
1954 charsets[0] = 1;
|
|
|
1955 }
|
|
|
1956
|
|
|
1957 void
|
|
|
1958 find_charsets_in_emchar_string (unsigned char *charsets, CONST Emchar *str,
|
|
|
1959 Charcount len)
|
|
|
1960 {
|
|
|
1961 /* Telescope this. */
|
|
|
1962 charsets[0] = 1;
|
|
|
1963 }
|
|
|
1964
|
|
|
1965 int
|
|
|
1966 bufbyte_string_displayed_columns (CONST Bufbyte *str, Bytecount len)
|
|
|
1967 {
|
|
|
1968 int cols = 0;
|
|
|
1969 CONST Bufbyte *end = str + len;
|
|
|
1970
|
|
|
1971 while (str < end)
|
|
|
1972 {
|
|
|
1973 cols++;
|
|
|
1974 INC_CHARPTR (str);
|
|
|
1975 }
|
|
|
1976
|
|
|
1977 return cols;
|
|
|
1978 }
|
|
|
1979
|
|
|
1980 int
|
|
|
1981 emchar_string_displayed_columns (CONST Emchar *str, Charcount len)
|
|
|
1982 {
|
|
|
1983 int cols = 0;
|
|
|
1984 int i;
|
|
|
1985
|
|
|
1986 for (i = 0; i < len; i++)
|
|
|
1987 cols += XCHARSET_COLUMNS (CHAR_CHARSET (str[i]));
|
|
|
1988
|
|
|
1989 return cols;
|
|
|
1990 }
|
|
|
1991
|
|
|
1992 /* NOTE: Does not reset the Dynarr. */
|
|
|
1993
|
|
|
1994 void
|
|
|
1995 convert_bufbyte_string_into_emchar_dynarr (CONST Bufbyte *str, Bytecount len,
|
|
|
1996 emchar_dynarr *dyn)
|
|
|
1997 {
|
|
|
1998 CONST Bufbyte *strend = str + len;
|
|
|
1999
|
|
|
2000 while (str < strend)
|
|
|
2001 {
|
|
|
2002 Emchar ch = charptr_emchar (str);
|
|
|
2003 Dynarr_add (dyn, ch);
|
|
|
2004 INC_CHARPTR (str);
|
|
|
2005 }
|
|
|
2006 }
|
|
|
2007
|
|
|
2008 int
|
|
|
2009 convert_bufbyte_string_into_emchar_string (CONST Bufbyte *str, Bytecount len,
|
|
|
2010 Emchar *arr)
|
|
|
2011 {
|
|
|
2012 CONST Bufbyte *strend = str + len;
|
|
|
2013 Charcount newlen = 0;
|
|
|
2014 while (str < strend)
|
|
|
2015 {
|
|
|
2016 Emchar ch = charptr_emchar (str);
|
|
|
2017 arr[newlen++] = ch;
|
|
|
2018 INC_CHARPTR (str);
|
|
|
2019 }
|
|
|
2020 return newlen;
|
|
|
2021 }
|
|
|
2022
|
|
|
2023 /* Convert an array of Emchars into the equivalent string representation.
|
|
|
2024 Store into the given Bufbyte dynarr. Does not reset the dynarr.
|
|
|
2025 Does not add a terminating zero. */
|
|
|
2026
|
|
|
2027 void
|
|
|
2028 convert_emchar_string_into_bufbyte_dynarr (Emchar *arr, int nels,
|
|
|
2029 bufbyte_dynarr *dyn)
|
|
|
2030 {
|
|
|
2031 Bufbyte str[MAX_EMCHAR_LEN];
|
|
|
2032 Bytecount len;
|
|
|
2033 int i;
|
|
|
2034
|
|
|
2035 for (i = 0; i < nels; i++)
|
|
|
2036 {
|
|
|
2037 len = set_charptr_emchar (str, arr[i]);
|
|
|
2038 Dynarr_add_many (dyn, str, len);
|
|
|
2039 }
|
|
|
2040 }
|
|
|
2041
|
|
|
2042 /* Convert an array of Emchars into the equivalent string representation.
|
|
|
2043 Malloc the space needed for this and return it. If LEN_OUT is not a
|
|
|
2044 NULL pointer, store into LEN_OUT the number of Bufbytes in the
|
|
|
2045 malloc()ed string. Note that the actual number of Bufbytes allocated
|
|
|
2046 is one more than this: the returned string is zero-terminated. */
|
|
|
2047
|
|
|
2048 Bufbyte *
|
|
|
2049 convert_emchar_string_into_malloced_string (Emchar *arr, int nels,
|
|
|
2050 Bytecount *len_out)
|
|
|
2051 {
|
|
|
2052 /* Damn zero-termination. */
|
|
|
2053 Bufbyte *str = (Bufbyte *) alloca (nels * MAX_EMCHAR_LEN + 1);
|
|
|
2054 Bufbyte *strorig = str;
|
|
|
2055 Bytecount len;
|
|
|
2056
|
|
|
2057 int i;
|
|
|
2058
|
|
|
2059 for (i = 0; i < nels; i++)
|
|
|
2060 str += set_charptr_emchar (str, arr[i]);
|
|
|
2061 *str = '\0';
|
|
|
2062 len = str - strorig;
|
|
|
2063 str = xmalloc (1 + len);
|
|
|
2064 memcpy (str, strorig, 1 + len);
|
|
|
2065 if (len_out)
|
|
|
2066 *len_out = len;
|
|
|
2067 return str;
|
|
|
2068 }
|
|
|
2069
|
|
|
2070
|
|
|
2071 /************************************************************************/
|
|
|
2072 /* initialization */
|
|
|
2073 /************************************************************************/
|
|
|
2074
|
|
|
2075 void
|
|
|
2076 vars_of_insdel (void)
|
|
|
2077 {
|
|
|
2078 int i;
|
|
|
2079
|
|
|
2080 inside_change_hook = 0;
|
|
|
2081 in_first_change = 0;
|
|
|
2082
|
|
|
2083 for (i = 0; i <= MAX_BYTIND_GAP_SIZE_3; i++)
|
|
|
2084 three_to_one_table[i] = i / 3;
|
|
|
2085 }
|
|
|
2086
|
|
|
2087 void
|
|
|
2088 init_buffer_text (struct buffer *b, int indirect_p)
|
|
|
2089 {
|
|
|
2090 if (!indirect_p)
|
|
|
2091 {
|
|
|
2092 SET_BUF_GAP_SIZE (b, 20);
|
|
|
2093 (void) BUFFER_ALLOC (b->text->beg,
|
|
|
2094 BUF_GAP_SIZE (b) + BUF_END_SENTINEL_SIZE);
|
|
|
2095 if (! BUF_BEG_ADDR (b))
|
|
|
2096 memory_full ();
|
|
|
2097
|
|
|
2098 SET_BI_BUF_GPT (b, 1);
|
|
|
2099 SET_BOTH_BUF_Z (b, 1, 1);
|
|
|
2100 SET_GAP_SENTINEL (b);
|
|
|
2101 SET_END_SENTINEL (b);
|
|
|
2102
|
|
|
2103 BUF_MODIFF (b) = 1;
|
|
|
2104 BUF_SAVE_MODIFF (b) = 1;
|
|
|
2105
|
|
|
2106 JUST_SET_POINT (b, 1, 1);
|
|
|
2107 SET_BOTH_BUF_BEGV (b, 1, 1);
|
|
|
2108 SET_BOTH_BUF_ZV (b, 1, 1);
|
|
|
2109
|
|
|
2110 b->text->changes =
|
|
|
2111 (struct buffer_text_change_data *)
|
|
|
2112 xmalloc (sizeof (*b->text->changes));
|
|
|
2113 memset (b->text->changes, 0, sizeof (*b->text->changes));
|
|
|
2114 }
|
|
|
2115 else
|
|
|
2116 {
|
|
|
2117 JUST_SET_POINT (b, BUF_PT (b->base_buffer), BI_BUF_PT (b->base_buffer));
|
|
|
2118 SET_BOTH_BUF_BEGV (b, BUF_BEGV (b->base_buffer),
|
|
|
2119 BI_BUF_BEGV (b->base_buffer));
|
|
|
2120 SET_BOTH_BUF_ZV (b, BUF_ZV (b->base_buffer),
|
|
|
2121 BI_BUF_ZV (b->base_buffer));
|
|
|
2122 }
|
|
|
2123
|
|
|
2124 b->changes =
|
|
|
2125 (struct each_buffer_change_data *) xmalloc (sizeof (*b->changes));
|
|
|
2126 memset (b->changes, 0, sizeof (*b->changes));
|
|
|
2127 BUF_FACECHANGE (b) = 1;
|
|
|
2128
|
|
|
2129 #ifdef REGION_CACHE_NEEDS_WORK
|
|
|
2130 b->newline_cache = 0;
|
|
|
2131 b->width_run_cache = 0;
|
|
|
2132 b->width_table = Qnil;
|
|
|
2133 #endif
|
|
|
2134 }
|
|
|
2135
|
|
|
2136 void
|
|
|
2137 uninit_buffer_text (struct buffer *b, int indirect_p)
|
|
|
2138 {
|
|
|
2139 if (!indirect_p)
|
|
|
2140 {
|
|
|
2141 BUFFER_FREE (b->text->beg);
|
|
|
2142 xfree (b->text->changes);
|
|
|
2143 }
|
|
|
2144 xfree (b->changes);
|
|
|
2145
|
|
|
2146 #ifdef REGION_CACHE_NEEDS_WORK
|
|
|
2147 if (b->newline_cache)
|
|
|
2148 {
|
|
|
2149 free_region_cache (b->newline_cache);
|
|
|
2150 b->newline_cache = 0;
|
|
|
2151 }
|
|
|
2152 if (b->width_run_cache)
|
|
|
2153 {
|
|
|
2154 free_region_cache (b->width_run_cache);
|
|
|
2155 b->width_run_cache = 0;
|
|
|
2156 }
|
|
|
2157 b->width_table = Qnil;
|
|
|
2158 #endif
|
|
|
2159 }
|
