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428
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1 /* Header file for the buffer manipulation primitives.
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2 Copyright (C) 1985, 1986, 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: FSF 19.30. */
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24
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25 /* Authorship:
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26
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27 FSF: long ago.
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28 JWZ: separated out bufslots.h, early in Lemacs.
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29 Ben Wing: almost completely rewritten for Mule, 19.12.
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30 */
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31
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440
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32 #ifndef INCLUDED_buffer_h_
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33 #define INCLUDED_buffer_h_
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428
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34
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35 #ifdef MULE
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36 #include "mule-charset.h"
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37 #endif
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38
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446
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39 #include "casetab.h"
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40 #include "chartab.h"
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41
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428
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42 /************************************************************************/
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43 /* */
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44 /* definition of Lisp buffer object */
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45 /* */
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46 /************************************************************************/
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47
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48 /* Note: we keep both Bytind and Bufpos versions of some of the
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49 important buffer positions because they are accessed so much.
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50 If we didn't do this, we would constantly be invalidating the
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51 bufpos<->bytind cache under Mule.
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52
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53 Note that under non-Mule, both versions will always be the
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54 same so we don't really need to keep track of them. But it
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55 simplifies the logic to go ahead and do so all the time and
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56 the memory loss is insignificant. */
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57
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58 /* Formerly, it didn't much matter what went inside the struct buffer_text
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59 and what went outside it. Now it does, with the advent of "indirect
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60 buffers" that share text with another buffer. An indirect buffer
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61 shares the same *text* as another buffer, but has its own buffer-local
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62 variables, its own accessible region, and its own markers and extents.
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63 (Due to the nature of markers, it doesn't actually matter much whether
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64 we stick them inside or out of the struct buffer_text -- the user won't
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65 notice any difference -- but we go ahead and put them outside for
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66 consistency and overall saneness of algorithm.)
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67
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68 FSFmacs gets away with not maintaining any "children" pointers from
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69 a buffer to the indirect buffers that refer to it by putting the
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70 markers inside of the struct buffer_text, using markers to keep track
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71 of BEGV and ZV in indirect buffers, and relying on the fact that
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72 all intervals (text properties and overlays) use markers for their
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73 start and end points. We don't do this for extents (markers are
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74 inefficient anyway and take up space), so we have to maintain
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75 children pointers. This is not terribly hard, though, and the
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76 code to maintain this is just like the code already present in
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77 extent-parent and extent-children.
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78 */
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79
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80 struct buffer_text
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81 {
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82 Bufbyte *beg; /* Actual address of buffer contents. */
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83 Bytind gpt; /* Index of gap in buffer. */
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84 Bytind z; /* Index of end of buffer. */
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85 Bufpos bufz; /* Equivalent as a Bufpos. */
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86 int gap_size; /* Size of buffer's gap */
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87 int end_gap_size; /* Size of buffer's end gap */
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88 long modiff; /* This counts buffer-modification events
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89 for this buffer. It is incremented for
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90 each such event, and never otherwise
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91 changed. */
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92 long save_modiff; /* Previous value of modiff, as of last
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93 time buffer visited or saved a file. */
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94
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95 #ifdef MULE
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96 /* We keep track of a "known" region for very fast access.
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97 This information is text-only so it goes here. */
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98 Bufpos mule_bufmin, mule_bufmax;
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99 Bytind mule_bytmin, mule_bytmax;
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100 int mule_shifter, mule_three_p;
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101
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102 /* And we also cache 16 positions for fairly fast access near those
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103 positions. */
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104 Bufpos mule_bufpos_cache[16];
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105 Bytind mule_bytind_cache[16];
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106 #endif
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107
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108 /* Similar to the above, we keep track of positions for which line
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109 number has last been calculated. See line-number.c. */
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110 Lisp_Object line_number_cache;
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111
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112 /* Change data that goes with the text. */
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113 struct buffer_text_change_data *changes;
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114
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115 };
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116
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117 struct buffer
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118 {
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119 struct lcrecord_header header;
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120
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121 /* This structure holds the coordinates of the buffer contents
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122 in ordinary buffers. In indirect buffers, this is not used. */
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123 struct buffer_text own_text;
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124
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125 /* This points to the `struct buffer_text' that is used for this buffer.
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126 In an ordinary buffer, this is the own_text field above.
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127 In an indirect buffer, this is the own_text field of another buffer. */
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128 struct buffer_text *text;
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129
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130 Bytind pt; /* Position of point in buffer. */
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131 Bufpos bufpt; /* Equivalent as a Bufpos. */
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132 Bytind begv; /* Index of beginning of accessible range. */
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133 Bufpos bufbegv; /* Equivalent as a Bufpos. */
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134 Bytind zv; /* Index of end of accessible range. */
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135 Bufpos bufzv; /* Equivalent as a Bufpos. */
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136
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137 int face_change; /* This is set when a change in how the text should
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138 be displayed (e.g., font, color) is made. */
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139
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140 /* change data indicating what portion of the text has changed
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141 since the last time this was reset. Used by redisplay.
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142 Logically we should keep this with the text structure, but
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143 redisplay resets it for each buffer individually and we don't
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144 want interference between an indirect buffer and its base
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145 buffer. */
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146 struct each_buffer_change_data *changes;
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147
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148 #ifdef REGION_CACHE_NEEDS_WORK
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149 /* If the long line scan cache is enabled (i.e. the buffer-local
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150 variable cache-long-line-scans is non-nil), newline_cache
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151 points to the newline cache, and width_run_cache points to the
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152 width run cache.
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153
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154 The newline cache records which stretches of the buffer are
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155 known *not* to contain newlines, so that they can be skipped
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156 quickly when we search for newlines.
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157
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158 The width run cache records which stretches of the buffer are
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159 known to contain characters whose widths are all the same. If
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160 the width run cache maps a character to a value > 0, that value
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161 is the character's width; if it maps a character to zero, we
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162 don't know what its width is. This allows compute_motion to
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163 process such regions very quickly, using algebra instead of
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164 inspecting each character. See also width_table, below. */
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165 struct region_cache *newline_cache;
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166 struct region_cache *width_run_cache;
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167 #endif /* REGION_CACHE_NEEDS_WORK */
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168
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169 /* The markers that refer to this buffer. This is actually a single
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170 marker -- successive elements in its marker `chain' are the other
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171 markers referring to this buffer */
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440
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172 Lisp_Marker *markers;
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428
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173
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174 /* The buffer's extent info. This is its own type, an extent-info
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175 object (done this way for ease in marking / finalizing). */
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176 Lisp_Object extent_info;
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177
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178 /* ----------------------------------------------------------------- */
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179 /* All the stuff above this line is the responsibility of insdel.c,
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180 with some help from marker.c and extents.c.
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181 All the stuff below this line is the responsibility of buffer.c. */
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182
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183 /* In an indirect buffer, this points to the base buffer.
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184 In an ordinary buffer, it is 0.
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185 We DO mark through this slot. */
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186 struct buffer *base_buffer;
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187
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188 /* List of indirect buffers whose base is this buffer.
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189 If we are an indirect buffer, this will be nil.
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190 Do NOT mark through this. */
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191 Lisp_Object indirect_children;
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192
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193 /* Flags saying which DEFVAR_PER_BUFFER variables
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194 are local to this buffer. */
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195 int local_var_flags;
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196
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197 /* Set to the modtime of the visited file when read or written.
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198 -1 means visited file was nonexistent.
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199 0 means visited file modtime unknown; in no case complain
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200 about any mismatch on next save attempt. */
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201 int modtime;
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202
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203 /* the value of text->modiff at the last auto-save. */
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442
|
204 long auto_save_modified;
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428
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205
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206 /* The time at which we detected a failure to auto-save,
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207 Or -1 if we didn't have a failure. */
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208 int auto_save_failure_time;
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209
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210 /* Position in buffer at which display started
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211 the last time this buffer was displayed. */
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212 int last_window_start;
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213
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214 /* Everything from here down must be a Lisp_Object */
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215
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216 #define MARKED_SLOT(x) Lisp_Object x
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217 #include "bufslots.h"
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218 #undef MARKED_SLOT
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219 };
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220
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221 DECLARE_LRECORD (buffer, struct buffer);
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222 #define XBUFFER(x) XRECORD (x, buffer, struct buffer)
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223 #define XSETBUFFER(x, p) XSETRECORD (x, p, buffer)
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224 #define BUFFERP(x) RECORDP (x, buffer)
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225 #define CHECK_BUFFER(x) CHECK_RECORD (x, buffer)
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226 #define CONCHECK_BUFFER(x) CONCHECK_RECORD (x, buffer)
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227
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228 #define BUFFER_LIVE_P(b) (!NILP ((b)->name))
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229
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230 #define CHECK_LIVE_BUFFER(x) do { \
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231 CHECK_BUFFER (x); \
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232 if (!BUFFER_LIVE_P (XBUFFER (x))) \
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233 dead_wrong_type_argument (Qbuffer_live_p, (x)); \
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234 } while (0)
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235
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236 #define CONCHECK_LIVE_BUFFER(x) do { \
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237 CONCHECK_BUFFER (x); \
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238 if (!BUFFER_LIVE_P (XBUFFER (x))) \
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239 x = wrong_type_argument (Qbuffer_live_p, (x)); \
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240 } while (0)
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241
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242
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243 #define BUFFER_BASE_BUFFER(b) ((b)->base_buffer ? (b)->base_buffer : (b))
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244
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245 /* Map over buffers sharing the same text as MPS_BUF. MPS_BUFVAR is a
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246 variable that gets the buffer values (beginning with the base
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247 buffer, then the children), and MPS_BUFCONS should be a temporary
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248 Lisp_Object variable. */
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249 #define MAP_INDIRECT_BUFFERS(mps_buf, mps_bufvar, mps_bufcons) \
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250 for (mps_bufcons = Qunbound, \
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251 mps_bufvar = BUFFER_BASE_BUFFER (mps_buf); \
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252 UNBOUNDP (mps_bufcons) ? \
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253 (mps_bufcons = mps_bufvar->indirect_children, \
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254 1) \
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255 : (!NILP (mps_bufcons) \
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256 && (mps_bufvar = XBUFFER (XCAR (mps_bufcons)), 1) \
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257 && (mps_bufcons = XCDR (mps_bufcons), 1)); \
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258 )
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259
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260
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261
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262 /************************************************************************/
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263 /* */
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264 /* working with raw internal-format data */
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265 /* */
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266 /************************************************************************/
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267
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268 /* NOTE: In all the following macros, we follow these rules concerning
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269 multiple evaluation of the arguments:
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270
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271 1) Anything that's an lvalue can be evaluated more than once.
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272 2) Anything that's a Lisp Object can be evaluated more than once.
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273 This should probably be changed, but this follows the way
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274 that all the macros in lisp.h do things.
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275 3) 'struct buffer *' arguments can be evaluated more than once.
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276 4) Nothing else can be evaluated more than once. Use inline
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277 functions, if necessary, to prevent multiple evaluation.
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278 5) An exception to (4) is that there are some macros below that
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279 may evaluate their arguments more than once. They are all
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280 denoted with the word "unsafe" in their name and are generally
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281 meant to be called only by other macros that have already
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282 stored the calling values in temporary variables.
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283
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284
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285 Use the following functions/macros on contiguous strings of data.
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286 If the text you're operating on is known to come from a buffer, use
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287 the buffer-level functions below -- they know about the gap and may
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288 be more efficient.
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289
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290
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291 (A) For working with charptr's (pointers to internally-formatted text):
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292 -----------------------------------------------------------------------
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293
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294 VALID_CHARPTR_P (ptr):
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295 Given a charptr, does it point to the beginning of a character?
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296
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297 ASSERT_VALID_CHARPTR (ptr):
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298 If error-checking is enabled, assert that the given charptr
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299 points to the beginning of a character. Otherwise, do nothing.
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300
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301 INC_CHARPTR (ptr):
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302 Given a charptr (assumed to point at the beginning of a character),
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303 modify that pointer so it points to the beginning of the next
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304 character.
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305
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306 DEC_CHARPTR (ptr):
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|
307 Given a charptr (assumed to point at the beginning of a
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308 character or at the very end of the text), modify that pointer
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309 so it points to the beginning of the previous character.
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310
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311 VALIDATE_CHARPTR_BACKWARD (ptr):
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312 Make sure that PTR is pointing to the beginning of a character.
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|
313 If not, back up until this is the case. Note that there are not
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|
314 too many places where it is legitimate to do this sort of thing.
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|
315 It's an error if you're passed an "invalid" char * pointer.
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|
316 NOTE: PTR *must* be pointing to a valid part of the string (i.e.
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|
317 not the very end, unless the string is zero-terminated or
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|
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318 something) in order for this function to not cause crashes.
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319
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320 VALIDATE_CHARPTR_FORWARD (ptr):
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321 Make sure that PTR is pointing to the beginning of a character.
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322 If not, move forward until this is the case. Note that there
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323 are not too many places where it is legitimate to do this sort
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324 of thing. It's an error if you're passed an "invalid" char *
|
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325 pointer.
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326
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327
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328 (B) For working with the length (in bytes and characters) of a
|
|
|
329 section of internally-formatted text:
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|
|
330 --------------------------------------------------------------
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|
331
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|
|
332 bytecount_to_charcount (ptr, nbi):
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333 Given a pointer to a text string and a length in bytes,
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334 return the equivalent length in characters.
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335
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|
|
336 charcount_to_bytecount (ptr, nch):
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337 Given a pointer to a text string and a length in characters,
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338 return the equivalent length in bytes.
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339
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|
340 charptr_n_addr (ptr, n):
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341 Return a pointer to the beginning of the character offset N
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|
|
342 (in characters) from PTR.
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343
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344
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|
345 (C) For retrieving or changing the character pointed to by a charptr:
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|
|
346 ---------------------------------------------------------------------
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347
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|
|
348 charptr_emchar (ptr):
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|
|
349 Retrieve the character pointed to by PTR as an Emchar.
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|
350
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|
|
351 charptr_emchar_n (ptr, n):
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|
352 Retrieve the character at offset N (in characters) from PTR,
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|
|
353 as an Emchar.
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354
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355 set_charptr_emchar (ptr, ch):
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|
356 Store the character CH (an Emchar) as internally-formatted
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|
|
357 text starting at PTR. Return the number of bytes stored.
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|
|
358
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|
|
359 charptr_copy_char (ptr, ptr2):
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|
|
360 Retrieve the character pointed to by PTR and store it as
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|
|
361 internally-formatted text in PTR2.
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|
|
362
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|
|
363
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|
|
364 (D) For working with Emchars:
|
|
|
365 -----------------------------
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|
|
366
|
|
|
367 [Note that there are other functions/macros for working with Emchars
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|
|
368 in mule-charset.h, for retrieving the charset of an Emchar
|
|
|
369 and such. These are only valid when MULE is defined.]
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|
|
370
|
|
|
371 valid_char_p (ch):
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|
|
372 Return whether the given Emchar is valid.
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|
|
373
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|
|
374 CHARP (ch):
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|
|
375 Return whether the given Lisp_Object is a character.
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|
|
376
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|
|
377 CHECK_CHAR_COERCE_INT (ch):
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|
|
378 Signal an error if CH is not a valid character or integer Lisp_Object.
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|
|
379 If CH is an integer Lisp_Object, convert it to a character Lisp_Object,
|
|
|
380 but merely by repackaging, without performing tests for char validity.
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|
|
381
|
|
|
382 MAX_EMCHAR_LEN:
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|
|
383 Maximum number of buffer bytes per Emacs character.
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|
|
384
|
|
|
385 */
|
|
|
386
|
|
|
387
|
|
|
388 /* ---------------------------------------------------------------------- */
|
|
|
389 /* (A) For working with charptr's (pointers to internally-formatted text) */
|
|
|
390 /* ---------------------------------------------------------------------- */
|
|
|
391
|
|
|
392 #ifdef MULE
|
|
|
393 # define VALID_CHARPTR_P(ptr) BUFBYTE_FIRST_BYTE_P (* (unsigned char *) ptr)
|
|
|
394 #else
|
|
|
395 # define VALID_CHARPTR_P(ptr) 1
|
|
|
396 #endif
|
|
|
397
|
|
|
398 #ifdef ERROR_CHECK_BUFPOS
|
|
|
399 # define ASSERT_VALID_CHARPTR(ptr) assert (VALID_CHARPTR_P (ptr))
|
|
|
400 #else
|
|
|
401 # define ASSERT_VALID_CHARPTR(ptr)
|
|
|
402 #endif
|
|
|
403
|
|
|
404 /* Note that INC_CHARPTR() and DEC_CHARPTR() have to be written in
|
|
|
405 completely separate ways. INC_CHARPTR() cannot use the DEC_CHARPTR()
|
|
|
406 trick of looking for a valid first byte because it might run off
|
|
|
407 the end of the string. DEC_CHARPTR() can't use the INC_CHARPTR()
|
|
|
408 method because it doesn't have easy access to the first byte of
|
|
|
409 the character it's moving over. */
|
|
|
410
|
|
|
411 #define REAL_INC_CHARPTR(ptr) \
|
|
|
412 ((void) ((ptr) += REP_BYTES_BY_FIRST_BYTE (* (unsigned char *) (ptr))))
|
|
|
413
|
|
444
|
414 #define REAL_INC_CHARBYTIND(ptr, pos) \
|
|
428
|
415 (pos += REP_BYTES_BY_FIRST_BYTE (* (unsigned char *) (ptr)))
|
|
|
416
|
|
|
417 #define REAL_DEC_CHARPTR(ptr) do { \
|
|
|
418 (ptr)--; \
|
|
|
419 } while (!VALID_CHARPTR_P (ptr))
|
|
|
420
|
|
|
421 #ifdef ERROR_CHECK_BUFPOS
|
|
|
422 #define INC_CHARPTR(ptr) do { \
|
|
|
423 ASSERT_VALID_CHARPTR (ptr); \
|
|
|
424 REAL_INC_CHARPTR (ptr); \
|
|
|
425 } while (0)
|
|
|
426
|
|
444
|
427 #define INC_CHARBYTIND(ptr, pos) do { \
|
|
|
428 ASSERT_VALID_CHARPTR (ptr); \
|
|
|
429 REAL_INC_CHARBYTIND (ptr, pos); \
|
|
428
|
430 } while (0)
|
|
|
431
|
|
|
432 #define DEC_CHARPTR(ptr) do { \
|
|
442
|
433 const Bufbyte *dc_ptr1 = (ptr); \
|
|
|
434 const Bufbyte *dc_ptr2 = dc_ptr1; \
|
|
428
|
435 REAL_DEC_CHARPTR (dc_ptr2); \
|
|
|
436 assert (dc_ptr1 - dc_ptr2 == \
|
|
|
437 REP_BYTES_BY_FIRST_BYTE (*dc_ptr2)); \
|
|
444
|
438 (ptr) = (Bufbyte *) dc_ptr2; \
|
|
428
|
439 } while (0)
|
|
|
440
|
|
|
441 #else /* ! ERROR_CHECK_BUFPOS */
|
|
444
|
442 #define INC_CHARBYTIND(ptr, pos) REAL_INC_CHARBYTIND (ptr, pos)
|
|
428
|
443 #define INC_CHARPTR(ptr) REAL_INC_CHARPTR (ptr)
|
|
|
444 #define DEC_CHARPTR(ptr) REAL_DEC_CHARPTR (ptr)
|
|
|
445 #endif /* ! ERROR_CHECK_BUFPOS */
|
|
|
446
|
|
|
447 #ifdef MULE
|
|
|
448
|
|
|
449 #define VALIDATE_CHARPTR_BACKWARD(ptr) do { \
|
|
|
450 while (!VALID_CHARPTR_P (ptr)) ptr--; \
|
|
|
451 } while (0)
|
|
|
452
|
|
|
453 /* This needs to be trickier to avoid the possibility of running off
|
|
|
454 the end of the string. */
|
|
|
455
|
|
|
456 #define VALIDATE_CHARPTR_FORWARD(ptr) do { \
|
|
|
457 Bufbyte *vcf_ptr = (ptr); \
|
|
|
458 VALIDATE_CHARPTR_BACKWARD (vcf_ptr); \
|
|
|
459 if (vcf_ptr != (ptr)) \
|
|
|
460 { \
|
|
|
461 (ptr) = vcf_ptr; \
|
|
|
462 INC_CHARPTR (ptr); \
|
|
|
463 } \
|
|
|
464 } while (0)
|
|
|
465
|
|
|
466 #else /* not MULE */
|
|
|
467 #define VALIDATE_CHARPTR_BACKWARD(ptr)
|
|
|
468 #define VALIDATE_CHARPTR_FORWARD(ptr)
|
|
|
469 #endif /* not MULE */
|
|
|
470
|
|
|
471 /* -------------------------------------------------------------- */
|
|
|
472 /* (B) For working with the length (in bytes and characters) of a */
|
|
|
473 /* section of internally-formatted text */
|
|
|
474 /* -------------------------------------------------------------- */
|
|
|
475
|
|
442
|
476 INLINE_HEADER const Bufbyte *
|
|
|
477 charptr_n_addr (const Bufbyte *ptr, Charcount offset);
|
|
|
478 INLINE_HEADER const Bufbyte *
|
|
|
479 charptr_n_addr (const Bufbyte *ptr, Charcount offset)
|
|
428
|
480 {
|
|
|
481 return ptr + charcount_to_bytecount (ptr, offset);
|
|
|
482 }
|
|
|
483
|
|
|
484 /* -------------------------------------------------------------------- */
|
|
|
485 /* (C) For retrieving or changing the character pointed to by a charptr */
|
|
|
486 /* -------------------------------------------------------------------- */
|
|
|
487
|
|
|
488 #define simple_charptr_emchar(ptr) ((Emchar) (ptr)[0])
|
|
|
489 #define simple_set_charptr_emchar(ptr, x) ((ptr)[0] = (Bufbyte) (x), 1)
|
|
|
490 #define simple_charptr_copy_char(ptr, ptr2) ((ptr2)[0] = *(ptr), 1)
|
|
|
491
|
|
|
492 #ifdef MULE
|
|
|
493
|
|
442
|
494 Emchar non_ascii_charptr_emchar (const Bufbyte *ptr);
|
|
428
|
495 Bytecount non_ascii_set_charptr_emchar (Bufbyte *ptr, Emchar c);
|
|
444
|
496 Bytecount non_ascii_charptr_copy_char (const Bufbyte *src, Bufbyte *dst);
|
|
428
|
497
|
|
442
|
498 INLINE_HEADER Emchar charptr_emchar (const Bufbyte *ptr);
|
|
|
499 INLINE_HEADER Emchar
|
|
|
500 charptr_emchar (const Bufbyte *ptr)
|
|
428
|
501 {
|
|
|
502 return BYTE_ASCII_P (*ptr) ?
|
|
|
503 simple_charptr_emchar (ptr) :
|
|
|
504 non_ascii_charptr_emchar (ptr);
|
|
|
505 }
|
|
|
506
|
|
442
|
507 INLINE_HEADER Bytecount set_charptr_emchar (Bufbyte *ptr, Emchar x);
|
|
|
508 INLINE_HEADER Bytecount
|
|
428
|
509 set_charptr_emchar (Bufbyte *ptr, Emchar x)
|
|
|
510 {
|
|
|
511 return !CHAR_MULTIBYTE_P (x) ?
|
|
|
512 simple_set_charptr_emchar (ptr, x) :
|
|
|
513 non_ascii_set_charptr_emchar (ptr, x);
|
|
|
514 }
|
|
|
515
|
|
444
|
516 /* Copy the character pointed to by SRC into DST.
|
|
|
517 Return the number of bytes copied. */
|
|
442
|
518 INLINE_HEADER Bytecount
|
|
444
|
519 charptr_copy_char (const Bufbyte *src, Bufbyte *dst);
|
|
442
|
520 INLINE_HEADER Bytecount
|
|
444
|
521 charptr_copy_char (const Bufbyte *src, Bufbyte *dst)
|
|
428
|
522 {
|
|
444
|
523 return BYTE_ASCII_P (*src) ?
|
|
|
524 simple_charptr_copy_char (src, dst) :
|
|
|
525 non_ascii_charptr_copy_char (src, dst);
|
|
428
|
526 }
|
|
|
527
|
|
|
528 #else /* not MULE */
|
|
|
529
|
|
|
530 # define charptr_emchar(ptr) simple_charptr_emchar (ptr)
|
|
|
531 # define set_charptr_emchar(ptr, x) simple_set_charptr_emchar (ptr, x)
|
|
|
532 # define charptr_copy_char(ptr, ptr2) simple_charptr_copy_char (ptr, ptr2)
|
|
|
533
|
|
|
534 #endif /* not MULE */
|
|
|
535
|
|
|
536 #define charptr_emchar_n(ptr, offset) \
|
|
|
537 charptr_emchar (charptr_n_addr (ptr, offset))
|
|
|
538
|
|
|
539
|
|
|
540 /* ---------------------------- */
|
|
|
541 /* (D) For working with Emchars */
|
|
|
542 /* ---------------------------- */
|
|
|
543
|
|
|
544 #ifdef MULE
|
|
|
545
|
|
|
546 int non_ascii_valid_char_p (Emchar ch);
|
|
|
547
|
|
442
|
548 INLINE_HEADER int valid_char_p (Emchar ch);
|
|
|
549 INLINE_HEADER int
|
|
428
|
550 valid_char_p (Emchar ch)
|
|
|
551 {
|
|
|
552 return ((unsigned int) (ch) <= 0xff) || non_ascii_valid_char_p (ch);
|
|
|
553 }
|
|
|
554
|
|
|
555 #else /* not MULE */
|
|
|
556
|
|
|
557 #define valid_char_p(ch) ((unsigned int) (ch) <= 0xff)
|
|
|
558
|
|
|
559 #endif /* not MULE */
|
|
|
560
|
|
|
561 #define CHAR_INTP(x) (INTP (x) && valid_char_p (XINT (x)))
|
|
|
562
|
|
|
563 #define CHAR_OR_CHAR_INTP(x) (CHARP (x) || CHAR_INTP (x))
|
|
|
564
|
|
442
|
565 INLINE_HEADER Emchar XCHAR_OR_CHAR_INT (Lisp_Object obj);
|
|
|
566 INLINE_HEADER Emchar
|
|
428
|
567 XCHAR_OR_CHAR_INT (Lisp_Object obj)
|
|
|
568 {
|
|
|
569 return CHARP (obj) ? XCHAR (obj) : XINT (obj);
|
|
|
570 }
|
|
|
571
|
|
|
572 #define CHECK_CHAR_COERCE_INT(x) do { \
|
|
|
573 if (CHARP (x)) \
|
|
|
574 ; \
|
|
|
575 else if (CHAR_INTP (x)) \
|
|
|
576 x = make_char (XINT (x)); \
|
|
|
577 else \
|
|
|
578 x = wrong_type_argument (Qcharacterp, x); \
|
|
|
579 } while (0)
|
|
|
580
|
|
|
581 #ifdef MULE
|
|
|
582 # define MAX_EMCHAR_LEN 4
|
|
|
583 #else
|
|
|
584 # define MAX_EMCHAR_LEN 1
|
|
|
585 #endif
|
|
|
586
|
|
|
587
|
|
|
588 /*----------------------------------------------------------------------*/
|
|
|
589 /* Accessor macros for important positions in a buffer */
|
|
|
590 /*----------------------------------------------------------------------*/
|
|
|
591
|
|
|
592 /* We put them here because some stuff below wants them before the
|
|
|
593 place where we would normally put them. */
|
|
|
594
|
|
|
595 /* None of these are lvalues. Use the settor macros below to change
|
|
|
596 the positions. */
|
|
|
597
|
|
|
598 /* Beginning of buffer. */
|
|
|
599 #define BI_BUF_BEG(buf) ((Bytind) 1)
|
|
|
600 #define BUF_BEG(buf) ((Bufpos) 1)
|
|
|
601
|
|
|
602 /* Beginning of accessible range of buffer. */
|
|
|
603 #define BI_BUF_BEGV(buf) ((buf)->begv + 0)
|
|
|
604 #define BUF_BEGV(buf) ((buf)->bufbegv + 0)
|
|
|
605
|
|
|
606 /* End of accessible range of buffer. */
|
|
|
607 #define BI_BUF_ZV(buf) ((buf)->zv + 0)
|
|
|
608 #define BUF_ZV(buf) ((buf)->bufzv + 0)
|
|
|
609
|
|
|
610 /* End of buffer. */
|
|
|
611 #define BI_BUF_Z(buf) ((buf)->text->z + 0)
|
|
|
612 #define BUF_Z(buf) ((buf)->text->bufz + 0)
|
|
|
613
|
|
|
614 /* Point. */
|
|
|
615 #define BI_BUF_PT(buf) ((buf)->pt + 0)
|
|
|
616 #define BUF_PT(buf) ((buf)->bufpt + 0)
|
|
|
617
|
|
|
618 /*----------------------------------------------------------------------*/
|
|
|
619 /* Converting between positions and addresses */
|
|
|
620 /*----------------------------------------------------------------------*/
|
|
|
621
|
|
|
622 /* Convert the address of a byte in the buffer into a position. */
|
|
442
|
623 INLINE_HEADER Bytind BI_BUF_PTR_BYTE_POS (struct buffer *buf, Bufbyte *ptr);
|
|
|
624 INLINE_HEADER Bytind
|
|
428
|
625 BI_BUF_PTR_BYTE_POS (struct buffer *buf, Bufbyte *ptr)
|
|
|
626 {
|
|
|
627 return (ptr - buf->text->beg + 1
|
|
|
628 - ((ptr - buf->text->beg + 1) > buf->text->gpt
|
|
|
629 ? buf->text->gap_size : 0));
|
|
|
630 }
|
|
|
631
|
|
|
632 #define BUF_PTR_BYTE_POS(buf, ptr) \
|
|
|
633 bytind_to_bufpos (buf, BI_BUF_PTR_BYTE_POS (buf, ptr))
|
|
|
634
|
|
|
635 /* Address of byte at position POS in buffer. */
|
|
442
|
636 INLINE_HEADER Bufbyte * BI_BUF_BYTE_ADDRESS (struct buffer *buf, Bytind pos);
|
|
|
637 INLINE_HEADER Bufbyte *
|
|
428
|
638 BI_BUF_BYTE_ADDRESS (struct buffer *buf, Bytind pos)
|
|
|
639 {
|
|
|
640 return (buf->text->beg +
|
|
|
641 ((pos >= buf->text->gpt ? (pos + buf->text->gap_size) : pos)
|
|
|
642 - 1));
|
|
|
643 }
|
|
|
644
|
|
|
645 #define BUF_BYTE_ADDRESS(buf, pos) \
|
|
|
646 BI_BUF_BYTE_ADDRESS (buf, bufpos_to_bytind (buf, pos))
|
|
|
647
|
|
|
648 /* Address of byte before position POS in buffer. */
|
|
442
|
649 INLINE_HEADER Bufbyte * BI_BUF_BYTE_ADDRESS_BEFORE (struct buffer *buf, Bytind pos);
|
|
|
650 INLINE_HEADER Bufbyte *
|
|
428
|
651 BI_BUF_BYTE_ADDRESS_BEFORE (struct buffer *buf, Bytind pos)
|
|
|
652 {
|
|
|
653 return (buf->text->beg +
|
|
|
654 ((pos > buf->text->gpt ? (pos + buf->text->gap_size) : pos)
|
|
|
655 - 2));
|
|
|
656 }
|
|
|
657
|
|
|
658 #define BUF_BYTE_ADDRESS_BEFORE(buf, pos) \
|
|
|
659 BI_BUF_BYTE_ADDRESS_BEFORE (buf, bufpos_to_bytind (buf, pos))
|
|
|
660
|
|
|
661 /*----------------------------------------------------------------------*/
|
|
|
662 /* Converting between byte indices and memory indices */
|
|
|
663 /*----------------------------------------------------------------------*/
|
|
|
664
|
|
442
|
665 INLINE_HEADER int valid_memind_p (struct buffer *buf, Memind x);
|
|
|
666 INLINE_HEADER int
|
|
428
|
667 valid_memind_p (struct buffer *buf, Memind x)
|
|
|
668 {
|
|
|
669 return ((x >= 1 && x <= (Memind) buf->text->gpt) ||
|
|
|
670 (x > (Memind) (buf->text->gpt + buf->text->gap_size) &&
|
|
|
671 x <= (Memind) (buf->text->z + buf->text->gap_size)));
|
|
|
672 }
|
|
|
673
|
|
442
|
674 INLINE_HEADER Memind bytind_to_memind (struct buffer *buf, Bytind x);
|
|
|
675 INLINE_HEADER Memind
|
|
428
|
676 bytind_to_memind (struct buffer *buf, Bytind x)
|
|
|
677 {
|
|
|
678 return (Memind) ((x > buf->text->gpt) ? (x + buf->text->gap_size) : x);
|
|
|
679 }
|
|
|
680
|
|
|
681
|
|
442
|
682 INLINE_HEADER Bytind memind_to_bytind (struct buffer *buf, Memind x);
|
|
|
683 INLINE_HEADER Bytind
|
|
428
|
684 memind_to_bytind (struct buffer *buf, Memind x)
|
|
|
685 {
|
|
|
686 #ifdef ERROR_CHECK_BUFPOS
|
|
|
687 assert (valid_memind_p (buf, x));
|
|
|
688 #endif
|
|
|
689 return (Bytind) ((x > (Memind) buf->text->gpt) ?
|
|
|
690 x - buf->text->gap_size :
|
|
|
691 x);
|
|
|
692 }
|
|
|
693
|
|
|
694 #define memind_to_bufpos(buf, x) \
|
|
|
695 bytind_to_bufpos (buf, memind_to_bytind (buf, x))
|
|
|
696 #define bufpos_to_memind(buf, x) \
|
|
|
697 bytind_to_memind (buf, bufpos_to_bytind (buf, x))
|
|
|
698
|
|
|
699 /* These macros generalize many standard buffer-position functions to
|
|
|
700 either a buffer or a string. */
|
|
|
701
|
|
|
702 /* Converting between Meminds and Bytinds, for a buffer-or-string.
|
|
|
703 For strings, this is a no-op. For buffers, this resolves
|
|
|
704 to the standard memind<->bytind converters. */
|
|
|
705
|
|
|
706 #define buffer_or_string_bytind_to_memind(obj, ind) \
|
|
|
707 (BUFFERP (obj) ? bytind_to_memind (XBUFFER (obj), ind) : (Memind) ind)
|
|
|
708
|
|
|
709 #define buffer_or_string_memind_to_bytind(obj, ind) \
|
|
|
710 (BUFFERP (obj) ? memind_to_bytind (XBUFFER (obj), ind) : (Bytind) ind)
|
|
|
711
|
|
|
712 /* Converting between Bufpos's and Bytinds, for a buffer-or-string.
|
|
|
713 For strings, this maps to the bytecount<->charcount converters. */
|
|
|
714
|
|
|
715 #define buffer_or_string_bufpos_to_bytind(obj, pos) \
|
|
|
716 (BUFFERP (obj) ? bufpos_to_bytind (XBUFFER (obj), pos) : \
|
|
|
717 (Bytind) charcount_to_bytecount (XSTRING_DATA (obj), pos))
|
|
|
718
|
|
|
719 #define buffer_or_string_bytind_to_bufpos(obj, ind) \
|
|
|
720 (BUFFERP (obj) ? bytind_to_bufpos (XBUFFER (obj), ind) : \
|
|
|
721 (Bufpos) bytecount_to_charcount (XSTRING_DATA (obj), ind))
|
|
|
722
|
|
|
723 /* Similar for Bufpos's and Meminds. */
|
|
|
724
|
|
|
725 #define buffer_or_string_bufpos_to_memind(obj, pos) \
|
|
|
726 (BUFFERP (obj) ? bufpos_to_memind (XBUFFER (obj), pos) : \
|
|
|
727 (Memind) charcount_to_bytecount (XSTRING_DATA (obj), pos))
|
|
|
728
|
|
|
729 #define buffer_or_string_memind_to_bufpos(obj, ind) \
|
|
|
730 (BUFFERP (obj) ? memind_to_bufpos (XBUFFER (obj), ind) : \
|
|
|
731 (Bufpos) bytecount_to_charcount (XSTRING_DATA (obj), ind))
|
|
|
732
|
|
|
733 /************************************************************************/
|
|
|
734 /* */
|
|
|
735 /* working with buffer-level data */
|
|
|
736 /* */
|
|
|
737 /************************************************************************/
|
|
|
738
|
|
|
739 /*
|
|
|
740
|
|
|
741 (A) Working with byte indices:
|
|
|
742 ------------------------------
|
|
|
743
|
|
|
744 VALID_BYTIND_P(buf, bi):
|
|
|
745 Given a byte index, does it point to the beginning of a character?
|
|
|
746
|
|
|
747 ASSERT_VALID_BYTIND_UNSAFE(buf, bi):
|
|
|
748 If error-checking is enabled, assert that the given byte index
|
|
|
749 is within range and points to the beginning of a character
|
|
|
750 or to the end of the buffer. Otherwise, do nothing.
|
|
|
751
|
|
|
752 ASSERT_VALID_BYTIND_BACKWARD_UNSAFE(buf, bi):
|
|
|
753 If error-checking is enabled, assert that the given byte index
|
|
|
754 is within range and satisfies ASSERT_VALID_BYTIND() and also
|
|
|
755 does not refer to the beginning of the buffer. (i.e. movement
|
|
|
756 backwards is OK.) Otherwise, do nothing.
|
|
|
757
|
|
|
758 ASSERT_VALID_BYTIND_FORWARD_UNSAFE(buf, bi):
|
|
|
759 If error-checking is enabled, assert that the given byte index
|
|
|
760 is within range and satisfies ASSERT_VALID_BYTIND() and also
|
|
|
761 does not refer to the end of the buffer. (i.e. movement
|
|
|
762 forwards is OK.) Otherwise, do nothing.
|
|
|
763
|
|
|
764 VALIDATE_BYTIND_BACKWARD(buf, bi):
|
|
|
765 Make sure that the given byte index is pointing to the beginning
|
|
|
766 of a character. If not, back up until this is the case. Note
|
|
|
767 that there are not too many places where it is legitimate to do
|
|
|
768 this sort of thing. It's an error if you're passed an "invalid"
|
|
|
769 byte index.
|
|
|
770
|
|
|
771 VALIDATE_BYTIND_FORWARD(buf, bi):
|
|
|
772 Make sure that the given byte index is pointing to the beginning
|
|
|
773 of a character. If not, move forward until this is the case.
|
|
|
774 Note that there are not too many places where it is legitimate
|
|
|
775 to do this sort of thing. It's an error if you're passed an
|
|
|
776 "invalid" byte index.
|
|
|
777
|
|
|
778 INC_BYTIND(buf, bi):
|
|
|
779 Given a byte index (assumed to point at the beginning of a
|
|
|
780 character), modify that value so it points to the beginning
|
|
|
781 of the next character.
|
|
|
782
|
|
|
783 DEC_BYTIND(buf, bi):
|
|
|
784 Given a byte index (assumed to point at the beginning of a
|
|
|
785 character), modify that value so it points to the beginning
|
|
|
786 of the previous character. Unlike for DEC_CHARPTR(), we can
|
|
|
787 do all the assert()s because there are sentinels at the
|
|
|
788 beginning of the gap and the end of the buffer.
|
|
|
789
|
|
|
790 BYTIND_INVALID:
|
|
|
791 A constant representing an invalid Bytind. Valid Bytinds
|
|
|
792 can never have this value.
|
|
|
793
|
|
|
794
|
|
|
795 (B) Converting between Bufpos's and Bytinds:
|
|
|
796 --------------------------------------------
|
|
|
797
|
|
|
798 bufpos_to_bytind(buf, bu):
|
|
|
799 Given a Bufpos, return the equivalent Bytind.
|
|
|
800
|
|
|
801 bytind_to_bufpos(buf, bi):
|
|
|
802 Given a Bytind, return the equivalent Bufpos.
|
|
|
803
|
|
|
804 make_bufpos(buf, bi):
|
|
|
805 Given a Bytind, return the equivalent Bufpos as a Lisp Object.
|
|
|
806 */
|
|
|
807
|
|
|
808
|
|
|
809 /*----------------------------------------------------------------------*/
|
|
|
810 /* working with byte indices */
|
|
|
811 /*----------------------------------------------------------------------*/
|
|
|
812
|
|
|
813 #ifdef MULE
|
|
|
814 # define VALID_BYTIND_P(buf, x) \
|
|
|
815 BUFBYTE_FIRST_BYTE_P (*BI_BUF_BYTE_ADDRESS (buf, x))
|
|
|
816 #else
|
|
|
817 # define VALID_BYTIND_P(buf, x) 1
|
|
|
818 #endif
|
|
|
819
|
|
|
820 #ifdef ERROR_CHECK_BUFPOS
|
|
|
821
|
|
|
822 # define ASSERT_VALID_BYTIND_UNSAFE(buf, x) do { \
|
|
|
823 assert (BUFFER_LIVE_P (buf)); \
|
|
|
824 assert ((x) >= BI_BUF_BEG (buf) && x <= BI_BUF_Z (buf)); \
|
|
|
825 assert (VALID_BYTIND_P (buf, x)); \
|
|
|
826 } while (0)
|
|
|
827 # define ASSERT_VALID_BYTIND_BACKWARD_UNSAFE(buf, x) do { \
|
|
|
828 assert (BUFFER_LIVE_P (buf)); \
|
|
|
829 assert ((x) > BI_BUF_BEG (buf) && x <= BI_BUF_Z (buf)); \
|
|
|
830 assert (VALID_BYTIND_P (buf, x)); \
|
|
|
831 } while (0)
|
|
|
832 # define ASSERT_VALID_BYTIND_FORWARD_UNSAFE(buf, x) do { \
|
|
|
833 assert (BUFFER_LIVE_P (buf)); \
|
|
|
834 assert ((x) >= BI_BUF_BEG (buf) && x < BI_BUF_Z (buf)); \
|
|
|
835 assert (VALID_BYTIND_P (buf, x)); \
|
|
|
836 } while (0)
|
|
|
837
|
|
|
838 #else /* not ERROR_CHECK_BUFPOS */
|
|
|
839 # define ASSERT_VALID_BYTIND_UNSAFE(buf, x)
|
|
|
840 # define ASSERT_VALID_BYTIND_BACKWARD_UNSAFE(buf, x)
|
|
|
841 # define ASSERT_VALID_BYTIND_FORWARD_UNSAFE(buf, x)
|
|
|
842
|
|
|
843 #endif /* not ERROR_CHECK_BUFPOS */
|
|
|
844
|
|
|
845 /* Note that, although the Mule version will work fine for non-Mule
|
|
|
846 as well (it should reduce down to nothing), we provide a separate
|
|
|
847 version to avoid compilation warnings and possible non-optimal
|
|
|
848 results with stupid compilers. */
|
|
|
849
|
|
|
850 #ifdef MULE
|
|
|
851 # define VALIDATE_BYTIND_BACKWARD(buf, x) do { \
|
|
|
852 Bufbyte *VBB_ptr = BI_BUF_BYTE_ADDRESS (buf, x); \
|
|
|
853 while (!BUFBYTE_FIRST_BYTE_P (*VBB_ptr)) \
|
|
|
854 VBB_ptr--, (x)--; \
|
|
|
855 } while (0)
|
|
|
856 #else
|
|
|
857 # define VALIDATE_BYTIND_BACKWARD(buf, x)
|
|
|
858 #endif
|
|
|
859
|
|
|
860 /* Note that, although the Mule version will work fine for non-Mule
|
|
|
861 as well (it should reduce down to nothing), we provide a separate
|
|
|
862 version to avoid compilation warnings and possible non-optimal
|
|
|
863 results with stupid compilers. */
|
|
|
864
|
|
|
865 #ifdef MULE
|
|
|
866 # define VALIDATE_BYTIND_FORWARD(buf, x) do { \
|
|
|
867 Bufbyte *VBF_ptr = BI_BUF_BYTE_ADDRESS (buf, x); \
|
|
|
868 while (!BUFBYTE_FIRST_BYTE_P (*VBF_ptr)) \
|
|
|
869 VBF_ptr++, (x)++; \
|
|
|
870 } while (0)
|
|
|
871 #else
|
|
|
872 # define VALIDATE_BYTIND_FORWARD(buf, x)
|
|
|
873 #endif
|
|
|
874
|
|
|
875 /* Note that in the simplest case (no MULE, no ERROR_CHECK_BUFPOS),
|
|
|
876 this crap reduces down to simply (x)++. */
|
|
|
877
|
|
|
878 #define INC_BYTIND(buf, x) do \
|
|
|
879 { \
|
|
|
880 ASSERT_VALID_BYTIND_FORWARD_UNSAFE (buf, x); \
|
|
|
881 /* Note that we do the increment first to \
|
|
|
882 make sure that the pointer in \
|
|
|
883 VALIDATE_BYTIND_FORWARD() ends up on \
|
|
|
884 the correct side of the gap */ \
|
|
|
885 (x)++; \
|
|
|
886 VALIDATE_BYTIND_FORWARD (buf, x); \
|
|
|
887 } while (0)
|
|
|
888
|
|
|
889 /* Note that in the simplest case (no MULE, no ERROR_CHECK_BUFPOS),
|
|
|
890 this crap reduces down to simply (x)--. */
|
|
|
891
|
|
|
892 #define DEC_BYTIND(buf, x) do \
|
|
|
893 { \
|
|
|
894 ASSERT_VALID_BYTIND_BACKWARD_UNSAFE (buf, x); \
|
|
|
895 /* Note that we do the decrement first to \
|
|
|
896 make sure that the pointer in \
|
|
|
897 VALIDATE_BYTIND_BACKWARD() ends up on \
|
|
|
898 the correct side of the gap */ \
|
|
|
899 (x)--; \
|
|
|
900 VALIDATE_BYTIND_BACKWARD (buf, x); \
|
|
|
901 } while (0)
|
|
|
902
|
|
442
|
903 INLINE_HEADER Bytind prev_bytind (struct buffer *buf, Bytind x);
|
|
|
904 INLINE_HEADER Bytind
|
|
428
|
905 prev_bytind (struct buffer *buf, Bytind x)
|
|
|
906 {
|
|
|
907 DEC_BYTIND (buf, x);
|
|
|
908 return x;
|
|
|
909 }
|
|
|
910
|
|
442
|
911 INLINE_HEADER Bytind next_bytind (struct buffer *buf, Bytind x);
|
|
|
912 INLINE_HEADER Bytind
|
|
428
|
913 next_bytind (struct buffer *buf, Bytind x)
|
|
|
914 {
|
|
|
915 INC_BYTIND (buf, x);
|
|
|
916 return x;
|
|
|
917 }
|
|
|
918
|
|
|
919 #define BYTIND_INVALID ((Bytind) -1)
|
|
|
920
|
|
|
921 /*----------------------------------------------------------------------*/
|
|
|
922 /* Converting between buffer positions and byte indices */
|
|
|
923 /*----------------------------------------------------------------------*/
|
|
|
924
|
|
|
925 #ifdef MULE
|
|
|
926
|
|
|
927 Bytind bufpos_to_bytind_func (struct buffer *buf, Bufpos x);
|
|
|
928 Bufpos bytind_to_bufpos_func (struct buffer *buf, Bytind x);
|
|
|
929
|
|
|
930 /* The basic algorithm we use is to keep track of a known region of
|
|
|
931 characters in each buffer, all of which are of the same width. We
|
|
|
932 keep track of the boundaries of the region in both Bufpos and
|
|
|
933 Bytind coordinates and also keep track of the char width, which
|
|
|
934 is 1 - 4 bytes. If the position we're translating is not in
|
|
|
935 the known region, then we invoke a function to update the known
|
|
|
936 region to surround the position in question. This assumes
|
|
|
937 locality of reference, which is usually the case.
|
|
|
938
|
|
|
939 Note that the function to update the known region can be simple
|
|
|
940 or complicated depending on how much information we cache.
|
|
|
941 For the moment, we don't cache any information, and just move
|
|
|
942 linearly forward or back from the known region, with a few
|
|
|
943 shortcuts to catch all-ASCII buffers. (Note that this will
|
|
|
944 thrash with bad locality of reference.) A smarter method would
|
|
|
945 be to keep some sort of pseudo-extent layer over the buffer;
|
|
|
946 maybe keep track of the bufpos/bytind correspondence at the
|
|
|
947 beginning of each line, which would allow us to do a binary
|
|
|
948 search over the pseudo-extents to narrow things down to the
|
|
|
949 correct line, at which point you could use a linear movement
|
|
|
950 method. This would also mesh well with efficiently
|
|
|
951 implementing a line-numbering scheme.
|
|
|
952
|
|
|
953 Note also that we have to multiply or divide by the char width
|
|
|
954 in order to convert the positions. We do some tricks to avoid
|
|
|
955 ever actually having to do a multiply or divide, because that
|
|
|
956 is typically an expensive operation (esp. divide). Multiplying
|
|
|
957 or dividing by 1, 2, or 4 can be implemented simply as a
|
|
|
958 shift left or shift right, and we keep track of a shifter value
|
|
|
959 (0, 1, or 2) indicating how much to shift. Multiplying by 3
|
|
|
960 can be implemented by doubling and then adding the original
|
|
|
961 value. Dividing by 3, alas, cannot be implemented in any
|
|
|
962 simple shift/subtract method, as far as I know; so we just
|
|
|
963 do a table lookup. For simplicity, we use a table of size
|
|
|
964 128K, which indexes the "divide-by-3" values for the first
|
|
|
965 64K non-negative numbers. (Note that we can increase the
|
|
|
966 size up to 384K, i.e. indexing the first 192K non-negative
|
|
|
967 numbers, while still using shorts in the array.) This also
|
|
|
968 means that the size of the known region can be at most
|
|
|
969 64K for width-three characters.
|
|
|
970 */
|
|
|
971
|
|
|
972 extern short three_to_one_table[];
|
|
|
973
|
|
442
|
974 INLINE_HEADER int real_bufpos_to_bytind (struct buffer *buf, Bufpos x);
|
|
|
975 INLINE_HEADER int
|
|
428
|
976 real_bufpos_to_bytind (struct buffer *buf, Bufpos x)
|
|
|
977 {
|
|
|
978 if (x >= buf->text->mule_bufmin && x <= buf->text->mule_bufmax)
|
|
|
979 return (buf->text->mule_bytmin +
|
|
|
980 ((x - buf->text->mule_bufmin) << buf->text->mule_shifter) +
|
|
|
981 (buf->text->mule_three_p ? (x - buf->text->mule_bufmin) : 0));
|
|
|
982 else
|
|
|
983 return bufpos_to_bytind_func (buf, x);
|
|
|
984 }
|
|
|
985
|
|
442
|
986 INLINE_HEADER int real_bytind_to_bufpos (struct buffer *buf, Bytind x);
|
|
|
987 INLINE_HEADER int
|
|
428
|
988 real_bytind_to_bufpos (struct buffer *buf, Bytind x)
|
|
|
989 {
|
|
|
990 if (x >= buf->text->mule_bytmin && x <= buf->text->mule_bytmax)
|
|
|
991 return (buf->text->mule_bufmin +
|
|
|
992 ((buf->text->mule_three_p
|
|
|
993 ? three_to_one_table[x - buf->text->mule_bytmin]
|
|
|
994 : (x - buf->text->mule_bytmin) >> buf->text->mule_shifter)));
|
|
|
995 else
|
|
|
996 return bytind_to_bufpos_func (buf, x);
|
|
|
997 }
|
|
|
998
|
|
|
999 #else /* not MULE */
|
|
|
1000
|
|
|
1001 # define real_bufpos_to_bytind(buf, x) ((Bytind) x)
|
|
|
1002 # define real_bytind_to_bufpos(buf, x) ((Bufpos) x)
|
|
|
1003
|
|
|
1004 #endif /* not MULE */
|
|
|
1005
|
|
|
1006 #ifdef ERROR_CHECK_BUFPOS
|
|
|
1007
|
|
|
1008 Bytind bufpos_to_bytind (struct buffer *buf, Bufpos x);
|
|
|
1009 Bufpos bytind_to_bufpos (struct buffer *buf, Bytind x);
|
|
|
1010
|
|
|
1011 #else /* not ERROR_CHECK_BUFPOS */
|
|
|
1012
|
|
|
1013 #define bufpos_to_bytind real_bufpos_to_bytind
|
|
|
1014 #define bytind_to_bufpos real_bytind_to_bufpos
|
|
|
1015
|
|
|
1016 #endif /* not ERROR_CHECK_BUFPOS */
|
|
|
1017
|
|
|
1018 #define make_bufpos(buf, ind) make_int (bytind_to_bufpos (buf, ind))
|
|
|
1019
|
|
|
1020 /*----------------------------------------------------------------------*/
|
|
|
1021 /* Converting between buffer bytes and Emacs characters */
|
|
|
1022 /*----------------------------------------------------------------------*/
|
|
|
1023
|
|
|
1024 /* The character at position POS in buffer. */
|
|
|
1025 #define BI_BUF_FETCH_CHAR(buf, pos) \
|
|
|
1026 charptr_emchar (BI_BUF_BYTE_ADDRESS (buf, pos))
|
|
|
1027 #define BUF_FETCH_CHAR(buf, pos) \
|
|
|
1028 BI_BUF_FETCH_CHAR (buf, bufpos_to_bytind (buf, pos))
|
|
|
1029
|
|
|
1030 /* The character at position POS in buffer, as a string. This is
|
|
|
1031 equivalent to set_charptr_emchar (str, BUF_FETCH_CHAR (buf, pos))
|
|
|
1032 but is faster for Mule. */
|
|
|
1033
|
|
|
1034 # define BI_BUF_CHARPTR_COPY_CHAR(buf, pos, str) \
|
|
|
1035 charptr_copy_char (BI_BUF_BYTE_ADDRESS (buf, pos), str)
|
|
|
1036 #define BUF_CHARPTR_COPY_CHAR(buf, pos, str) \
|
|
|
1037 BI_BUF_CHARPTR_COPY_CHAR (buf, bufpos_to_bytind (buf, pos), str)
|
|
|
1038
|
|
|
1039
|
|
|
1040 /************************************************************************/
|
|
440
|
1041 /* */
|
|
|
1042 /* Converting between internal and external format */
|
|
|
1043 /* */
|
|
428
|
1044 /************************************************************************/
|
|
440
|
1045 /*
|
|
|
1046 All client code should use only the two macros
|
|
428
|
1047
|
|
440
|
1048 TO_EXTERNAL_FORMAT (source_type, source, sink_type, sink, coding_system)
|
|
|
1049 TO_INTERNAL_FORMAT (source_type, source, sink_type, sink, coding_system)
|
|
|
1050
|
|
|
1051 Typical use is
|
|
428
|
1052
|
|
440
|
1053 TO_EXTERNAL_FORMAT (DATA, (ptr, len),
|
|
|
1054 LISP_BUFFER, buffer,
|
|
|
1055 Qfile_name);
|
|
428
|
1056
|
|
440
|
1057 The source or sink can be specified in one of these ways:
|
|
428
|
1058
|
|
440
|
1059 DATA, (ptr, len), // input data is a fixed buffer of size len
|
|
|
1060 ALLOCA, (ptr, len), // output data is in a alloca()ed buffer of size len
|
|
|
1061 MALLOC, (ptr, len), // output data is in a malloc()ed buffer of size len
|
|
444
|
1062 C_STRING_ALLOCA, ptr, // equivalent to ALLOCA (ptr, len_ignored) on output
|
|
|
1063 C_STRING_MALLOC, ptr, // equivalent to MALLOC (ptr, len_ignored) on output
|
|
440
|
1064 C_STRING, ptr, // equivalent to DATA, (ptr, strlen (ptr) + 1) on input
|
|
|
1065 LISP_STRING, string, // input or output is a Lisp_Object of type string
|
|
|
1066 LISP_BUFFER, buffer, // output is written to (point) in lisp buffer
|
|
|
1067 LISP_LSTREAM, lstream, // input or output is a Lisp_Object of type lstream
|
|
|
1068 LISP_OPAQUE, object, // input or output is a Lisp_Object of type opaque
|
|
428
|
1069
|
|
440
|
1070 When specifying the sink, use lvalues, since the macro will assign to them,
|
|
|
1071 except when the sink is an lstream or a lisp buffer.
|
|
428
|
1072
|
|
440
|
1073 The macros accept the kinds of sources and sinks appropriate for
|
|
|
1074 internal and external data representation. See the type_checking_assert
|
|
|
1075 macros below for the actual allowed types.
|
|
428
|
1076
|
|
440
|
1077 Since some sources and sinks use one argument (a Lisp_Object) to
|
|
|
1078 specify them, while others take a (pointer, length) pair, we use
|
|
|
1079 some C preprocessor trickery to allow pair arguments to be specified
|
|
|
1080 by parenthesizing them, as in the examples above.
|
|
428
|
1081
|
|
440
|
1082 Anything prefixed by dfc_ (`data format conversion') is private.
|
|
|
1083 They are only used to implement these macros.
|
|
428
|
1084
|
|
440
|
1085 Using C_STRING* is appropriate for using with external APIs that take
|
|
|
1086 null-terminated strings. For internal data, we should try to be
|
|
|
1087 '\0'-clean - i.e. allow arbitrary data to contain embedded '\0'.
|
|
428
|
1088
|
|
440
|
1089 Sometime in the future we might allow output to C_STRING_ALLOCA or
|
|
|
1090 C_STRING_MALLOC _only_ with TO_EXTERNAL_FORMAT(), not
|
|
|
1091 TO_INTERNAL_FORMAT(). */
|
|
428
|
1092
|
|
440
|
1093 #define TO_EXTERNAL_FORMAT(source_type, source, sink_type, sink, coding_system) \
|
|
|
1094 do { \
|
|
|
1095 dfc_conversion_type dfc_simplified_source_type; \
|
|
|
1096 dfc_conversion_type dfc_simplified_sink_type; \
|
|
|
1097 dfc_conversion_data dfc_source; \
|
|
|
1098 dfc_conversion_data dfc_sink; \
|
|
|
1099 \
|
|
|
1100 type_checking_assert \
|
|
|
1101 ((DFC_TYPE_##source_type == DFC_TYPE_DATA || \
|
|
|
1102 DFC_TYPE_##source_type == DFC_TYPE_C_STRING || \
|
|
|
1103 DFC_TYPE_##source_type == DFC_TYPE_LISP_STRING || \
|
|
|
1104 DFC_TYPE_##source_type == DFC_TYPE_LISP_OPAQUE || \
|
|
|
1105 DFC_TYPE_##source_type == DFC_TYPE_LISP_LSTREAM) \
|
|
|
1106 && \
|
|
|
1107 (DFC_TYPE_##sink_type == DFC_TYPE_ALLOCA || \
|
|
|
1108 DFC_TYPE_##sink_type == DFC_TYPE_MALLOC || \
|
|
|
1109 DFC_TYPE_##sink_type == DFC_TYPE_C_STRING_ALLOCA || \
|
|
|
1110 DFC_TYPE_##sink_type == DFC_TYPE_C_STRING_MALLOC || \
|
|
|
1111 DFC_TYPE_##sink_type == DFC_TYPE_LISP_LSTREAM || \
|
|
|
1112 DFC_TYPE_##sink_type == DFC_TYPE_LISP_OPAQUE)); \
|
|
|
1113 \
|
|
|
1114 DFC_SOURCE_##source_type##_TO_ARGS (source); \
|
|
|
1115 DFC_SINK_##sink_type##_TO_ARGS (sink); \
|
|
|
1116 \
|
|
|
1117 DFC_CONVERT_TO_EXTERNAL_FORMAT (dfc_simplified_source_type, &dfc_source, \
|
|
|
1118 coding_system, \
|
|
|
1119 dfc_simplified_sink_type, &dfc_sink); \
|
|
|
1120 \
|
|
|
1121 DFC_##sink_type##_USE_CONVERTED_DATA (sink); \
|
|
428
|
1122 } while (0)
|
|
|
1123
|
|
440
|
1124 #define TO_INTERNAL_FORMAT(source_type, source, sink_type, sink, coding_system) \
|
|
|
1125 do { \
|
|
|
1126 dfc_conversion_type dfc_simplified_source_type; \
|
|
|
1127 dfc_conversion_type dfc_simplified_sink_type; \
|
|
|
1128 dfc_conversion_data dfc_source; \
|
|
|
1129 dfc_conversion_data dfc_sink; \
|
|
|
1130 \
|
|
|
1131 type_checking_assert \
|
|
|
1132 ((DFC_TYPE_##source_type == DFC_TYPE_DATA || \
|
|
|
1133 DFC_TYPE_##source_type == DFC_TYPE_C_STRING || \
|
|
|
1134 DFC_TYPE_##source_type == DFC_TYPE_LISP_OPAQUE || \
|
|
|
1135 DFC_TYPE_##source_type == DFC_TYPE_LISP_LSTREAM) \
|
|
|
1136 && \
|
|
|
1137 (DFC_TYPE_##sink_type == DFC_TYPE_ALLOCA || \
|
|
|
1138 DFC_TYPE_##sink_type == DFC_TYPE_MALLOC || \
|
|
|
1139 DFC_TYPE_##sink_type == DFC_TYPE_C_STRING_ALLOCA || \
|
|
|
1140 DFC_TYPE_##sink_type == DFC_TYPE_C_STRING_MALLOC || \
|
|
|
1141 DFC_TYPE_##sink_type == DFC_TYPE_LISP_STRING || \
|
|
|
1142 DFC_TYPE_##sink_type == DFC_TYPE_LISP_LSTREAM || \
|
|
|
1143 DFC_TYPE_##sink_type == DFC_TYPE_LISP_BUFFER)); \
|
|
|
1144 \
|
|
|
1145 DFC_SOURCE_##source_type##_TO_ARGS (source); \
|
|
|
1146 DFC_SINK_##sink_type##_TO_ARGS (sink); \
|
|
|
1147 \
|
|
|
1148 DFC_CONVERT_TO_INTERNAL_FORMAT (dfc_simplified_source_type, &dfc_source, \
|
|
|
1149 coding_system, \
|
|
|
1150 dfc_simplified_sink_type, &dfc_sink); \
|
|
|
1151 \
|
|
|
1152 DFC_##sink_type##_USE_CONVERTED_DATA (sink); \
|
|
428
|
1153 } while (0)
|
|
|
1154
|
|
440
|
1155 #ifdef FILE_CODING
|
|
|
1156 #define DFC_CONVERT_TO_EXTERNAL_FORMAT dfc_convert_to_external_format
|
|
|
1157 #define DFC_CONVERT_TO_INTERNAL_FORMAT dfc_convert_to_internal_format
|
|
|
1158 #else
|
|
|
1159 /* ignore coding_system argument */
|
|
|
1160 #define DFC_CONVERT_TO_EXTERNAL_FORMAT(a, b, coding_system, c, d) \
|
|
|
1161 dfc_convert_to_external_format (a, b, c, d)
|
|
|
1162 #define DFC_CONVERT_TO_INTERNAL_FORMAT(a, b, coding_system, c, d) \
|
|
|
1163 dfc_convert_to_internal_format (a, b, c, d)
|
|
|
1164 #endif
|
|
428
|
1165
|
|
440
|
1166 typedef union
|
|
|
1167 {
|
|
|
1168 struct { const void *ptr; size_t len; } data;
|
|
|
1169 Lisp_Object lisp_object;
|
|
|
1170 } dfc_conversion_data;
|
|
428
|
1171
|
|
440
|
1172 enum dfc_conversion_type
|
|
|
1173 {
|
|
|
1174 DFC_TYPE_DATA,
|
|
|
1175 DFC_TYPE_ALLOCA,
|
|
|
1176 DFC_TYPE_MALLOC,
|
|
|
1177 DFC_TYPE_C_STRING,
|
|
|
1178 DFC_TYPE_C_STRING_ALLOCA,
|
|
|
1179 DFC_TYPE_C_STRING_MALLOC,
|
|
|
1180 DFC_TYPE_LISP_STRING,
|
|
|
1181 DFC_TYPE_LISP_LSTREAM,
|
|
|
1182 DFC_TYPE_LISP_OPAQUE,
|
|
|
1183 DFC_TYPE_LISP_BUFFER
|
|
|
1184 };
|
|
|
1185 typedef enum dfc_conversion_type dfc_conversion_type;
|
|
428
|
1186
|
|
440
|
1187 /* WARNING: These use a static buffer. This can lead to disaster if
|
|
|
1188 these functions are not used *very* carefully. Another reason to only use
|
|
442
|
1189 TO_EXTERNAL_FORMAT() and TO_INTERNAL_FORMAT(). */
|
|
440
|
1190 void
|
|
|
1191 dfc_convert_to_external_format (dfc_conversion_type source_type,
|
|
|
1192 dfc_conversion_data *source,
|
|
|
1193 #ifdef FILE_CODING
|
|
|
1194 Lisp_Object coding_system,
|
|
|
1195 #endif
|
|
|
1196 dfc_conversion_type sink_type,
|
|
|
1197 dfc_conversion_data *sink);
|
|
|
1198 void
|
|
|
1199 dfc_convert_to_internal_format (dfc_conversion_type source_type,
|
|
|
1200 dfc_conversion_data *source,
|
|
|
1201 #ifdef FILE_CODING
|
|
|
1202 Lisp_Object coding_system,
|
|
|
1203 #endif
|
|
|
1204 dfc_conversion_type sink_type,
|
|
|
1205 dfc_conversion_data *sink);
|
|
|
1206 /* CPP Trickery */
|
|
|
1207 #define DFC_CPP_CAR(x,y) (x)
|
|
|
1208 #define DFC_CPP_CDR(x,y) (y)
|
|
|
1209
|
|
|
1210 /* Convert `source' to args for dfc_convert_to_*_format() */
|
|
|
1211 #define DFC_SOURCE_DATA_TO_ARGS(val) do { \
|
|
|
1212 dfc_source.data.ptr = DFC_CPP_CAR val; \
|
|
|
1213 dfc_source.data.len = DFC_CPP_CDR val; \
|
|
|
1214 dfc_simplified_source_type = DFC_TYPE_DATA; \
|
|
428
|
1215 } while (0)
|
|
440
|
1216 #define DFC_SOURCE_C_STRING_TO_ARGS(val) do { \
|
|
|
1217 dfc_source.data.len = \
|
|
|
1218 strlen ((char *) (dfc_source.data.ptr = (val))); \
|
|
|
1219 dfc_simplified_source_type = DFC_TYPE_DATA; \
|
|
|
1220 } while (0)
|
|
|
1221 #define DFC_SOURCE_LISP_STRING_TO_ARGS(val) do { \
|
|
|
1222 Lisp_Object dfc_slsta = (val); \
|
|
|
1223 type_checking_assert (STRINGP (dfc_slsta)); \
|
|
|
1224 dfc_source.lisp_object = dfc_slsta; \
|
|
|
1225 dfc_simplified_source_type = DFC_TYPE_LISP_STRING; \
|
|
|
1226 } while (0)
|
|
|
1227 #define DFC_SOURCE_LISP_LSTREAM_TO_ARGS(val) do { \
|
|
|
1228 Lisp_Object dfc_sllta = (val); \
|
|
|
1229 type_checking_assert (LSTREAMP (dfc_sllta)); \
|
|
|
1230 dfc_source.lisp_object = dfc_sllta; \
|
|
|
1231 dfc_simplified_source_type = DFC_TYPE_LISP_LSTREAM; \
|
|
|
1232 } while (0)
|
|
|
1233 #define DFC_SOURCE_LISP_OPAQUE_TO_ARGS(val) do { \
|
|
|
1234 Lisp_Opaque *dfc_slota = XOPAQUE (val); \
|
|
|
1235 dfc_source.data.ptr = OPAQUE_DATA (dfc_slota); \
|
|
|
1236 dfc_source.data.len = OPAQUE_SIZE (dfc_slota); \
|
|
|
1237 dfc_simplified_source_type = DFC_TYPE_DATA; \
|
|
428
|
1238 } while (0)
|
|
|
1239
|
|
440
|
1240 /* Convert `sink' to args for dfc_convert_to_*_format() */
|
|
|
1241 #define DFC_SINK_ALLOCA_TO_ARGS(val) \
|
|
|
1242 dfc_simplified_sink_type = DFC_TYPE_DATA
|
|
|
1243 #define DFC_SINK_C_STRING_ALLOCA_TO_ARGS(val) \
|
|
|
1244 dfc_simplified_sink_type = DFC_TYPE_DATA
|
|
|
1245 #define DFC_SINK_MALLOC_TO_ARGS(val) \
|
|
|
1246 dfc_simplified_sink_type = DFC_TYPE_DATA
|
|
|
1247 #define DFC_SINK_C_STRING_MALLOC_TO_ARGS(val) \
|
|
|
1248 dfc_simplified_sink_type = DFC_TYPE_DATA
|
|
|
1249 #define DFC_SINK_LISP_STRING_TO_ARGS(val) \
|
|
|
1250 dfc_simplified_sink_type = DFC_TYPE_DATA
|
|
|
1251 #define DFC_SINK_LISP_OPAQUE_TO_ARGS(val) \
|
|
|
1252 dfc_simplified_sink_type = DFC_TYPE_DATA
|
|
|
1253 #define DFC_SINK_LISP_LSTREAM_TO_ARGS(val) do { \
|
|
|
1254 Lisp_Object dfc_sllta = (val); \
|
|
|
1255 type_checking_assert (LSTREAMP (dfc_sllta)); \
|
|
|
1256 dfc_sink.lisp_object = dfc_sllta; \
|
|
|
1257 dfc_simplified_sink_type = DFC_TYPE_LISP_LSTREAM; \
|
|
|
1258 } while (0)
|
|
|
1259 #define DFC_SINK_LISP_BUFFER_TO_ARGS(val) do { \
|
|
|
1260 struct buffer *dfc_slbta = XBUFFER (val); \
|
|
|
1261 dfc_sink.lisp_object = \
|
|
|
1262 make_lisp_buffer_output_stream \
|
|
|
1263 (dfc_slbta, BUF_PT (dfc_slbta), 0); \
|
|
|
1264 dfc_simplified_sink_type = DFC_TYPE_LISP_LSTREAM; \
|
|
428
|
1265 } while (0)
|
|
|
1266
|
|
440
|
1267 /* Assign to the `sink' lvalue(s) using the converted data. */
|
|
442
|
1268 typedef union { char c; void *p; } *dfc_aliasing_voidpp;
|
|
440
|
1269 #define DFC_ALLOCA_USE_CONVERTED_DATA(sink) do { \
|
|
|
1270 void * dfc_sink_ret = alloca (dfc_sink.data.len + 1); \
|
|
|
1271 memcpy (dfc_sink_ret, dfc_sink.data.ptr, dfc_sink.data.len + 1); \
|
|
442
|
1272 ((dfc_aliasing_voidpp) &(DFC_CPP_CAR sink))->p = dfc_sink_ret; \
|
|
440
|
1273 (DFC_CPP_CDR sink) = dfc_sink.data.len; \
|
|
|
1274 } while (0)
|
|
|
1275 #define DFC_MALLOC_USE_CONVERTED_DATA(sink) do { \
|
|
|
1276 void * dfc_sink_ret = xmalloc (dfc_sink.data.len + 1); \
|
|
|
1277 memcpy (dfc_sink_ret, dfc_sink.data.ptr, dfc_sink.data.len + 1); \
|
|
442
|
1278 ((dfc_aliasing_voidpp) &(DFC_CPP_CAR sink))->p = dfc_sink_ret; \
|
|
440
|
1279 (DFC_CPP_CDR sink) = dfc_sink.data.len; \
|
|
|
1280 } while (0)
|
|
|
1281 #define DFC_C_STRING_ALLOCA_USE_CONVERTED_DATA(sink) do { \
|
|
|
1282 void * dfc_sink_ret = alloca (dfc_sink.data.len + 1); \
|
|
|
1283 memcpy (dfc_sink_ret, dfc_sink.data.ptr, dfc_sink.data.len + 1); \
|
|
|
1284 (sink) = (char *) dfc_sink_ret; \
|
|
|
1285 } while (0)
|
|
|
1286 #define DFC_C_STRING_MALLOC_USE_CONVERTED_DATA(sink) do { \
|
|
|
1287 void * dfc_sink_ret = xmalloc (dfc_sink.data.len + 1); \
|
|
|
1288 memcpy (dfc_sink_ret, dfc_sink.data.ptr, dfc_sink.data.len + 1); \
|
|
|
1289 (sink) = (char *) dfc_sink_ret; \
|
|
|
1290 } while (0)
|
|
|
1291 #define DFC_LISP_STRING_USE_CONVERTED_DATA(sink) \
|
|
|
1292 sink = make_string ((Bufbyte *) dfc_sink.data.ptr, dfc_sink.data.len)
|
|
|
1293 #define DFC_LISP_OPAQUE_USE_CONVERTED_DATA(sink) \
|
|
|
1294 sink = make_opaque (dfc_sink.data.ptr, dfc_sink.data.len)
|
|
|
1295 #define DFC_LISP_LSTREAM_USE_CONVERTED_DATA(sink) /* data already used */
|
|
|
1296 #define DFC_LISP_BUFFER_USE_CONVERTED_DATA(sink) \
|
|
|
1297 Lstream_delete (XLSTREAM (dfc_sink.lisp_object))
|
|
428
|
1298
|
|
440
|
1299 /* Someday we might want to distinguish between Qnative and Qfile_name
|
|
|
1300 by using coding-system aliases, but for now it suffices to have
|
|
|
1301 these be identical. Qnative can be used as the coding_system
|
|
|
1302 argument to TO_EXTERNAL_FORMAT() and TO_INTERNAL_FORMAT(). */
|
|
|
1303 #define Qnative Qfile_name
|
|
428
|
1304
|
|
442
|
1305 #if defined (WIN32_NATIVE) || defined (CYGWIN)
|
|
|
1306 /* #### kludge!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
|
|
|
1307 Remove this as soon as my Mule code is integrated. */
|
|
|
1308 #define Qmswindows_tstr Qnative
|
|
|
1309 #endif
|
|
|
1310
|
|
|
1311 /* More stand-ins */
|
|
|
1312 #define Qcommand_argument_encoding Qnative
|
|
|
1313 #define Qenvironment_variable_encoding Qnative
|
|
|
1314
|
|
|
1315 /* Convenience macros for extremely common invocations */
|
|
|
1316 #define C_STRING_TO_EXTERNAL(in, out, coding_system) \
|
|
|
1317 TO_EXTERNAL_FORMAT (C_STRING, in, C_STRING_ALLOCA, out, coding_system)
|
|
|
1318 #define C_STRING_TO_EXTERNAL_MALLOC(in, out, coding_system) \
|
|
|
1319 TO_EXTERNAL_FORMAT (C_STRING, in, C_STRING_MALLOC, out, coding_system)
|
|
|
1320 #define EXTERNAL_TO_C_STRING(in, out, coding_system) \
|
|
|
1321 TO_INTERNAL_FORMAT (C_STRING, in, C_STRING_ALLOCA, out, coding_system)
|
|
|
1322 #define EXTERNAL_TO_C_STRING_MALLOC(in, out, coding_system) \
|
|
|
1323 TO_INTERNAL_FORMAT (C_STRING, in, C_STRING_MALLOC, out, coding_system)
|
|
|
1324 #define LISP_STRING_TO_EXTERNAL(in, out, coding_system) \
|
|
|
1325 TO_EXTERNAL_FORMAT (LISP_STRING, in, C_STRING_ALLOCA, out, coding_system)
|
|
|
1326 #define LISP_STRING_TO_EXTERNAL_MALLOC(in, out, coding_system) \
|
|
|
1327 TO_EXTERNAL_FORMAT (LISP_STRING, in, C_STRING_MALLOC, out, coding_system)
|
|
|
1328
|
|
428
|
1329
|
|
|
1330 /************************************************************************/
|
|
|
1331 /* */
|
|
|
1332 /* fake charset functions */
|
|
|
1333 /* */
|
|
|
1334 /************************************************************************/
|
|
|
1335
|
|
|
1336 /* used when MULE is not defined, so that Charset-type stuff can still
|
|
|
1337 be done */
|
|
|
1338
|
|
|
1339 #ifndef MULE
|
|
|
1340
|
|
|
1341 #define Vcharset_ascii Qnil
|
|
|
1342
|
|
|
1343 #define CHAR_CHARSET(ch) Vcharset_ascii
|
|
|
1344 #define CHAR_LEADING_BYTE(ch) LEADING_BYTE_ASCII
|
|
|
1345 #define LEADING_BYTE_ASCII 0x80
|
|
|
1346 #define NUM_LEADING_BYTES 1
|
|
|
1347 #define MIN_LEADING_BYTE 0x80
|
|
|
1348 #define CHARSETP(cs) 1
|
|
|
1349 #define CHARSET_BY_LEADING_BYTE(lb) Vcharset_ascii
|
|
|
1350 #define XCHARSET_LEADING_BYTE(cs) LEADING_BYTE_ASCII
|
|
|
1351 #define XCHARSET_GRAPHIC(cs) -1
|
|
|
1352 #define XCHARSET_COLUMNS(cs) 1
|
|
|
1353 #define XCHARSET_DIMENSION(cs) 1
|
|
|
1354 #define REP_BYTES_BY_FIRST_BYTE(fb) 1
|
|
|
1355 #define BREAKUP_CHAR(ch, charset, byte1, byte2) do { \
|
|
|
1356 (charset) = Vcharset_ascii; \
|
|
|
1357 (byte1) = (ch); \
|
|
|
1358 (byte2) = 0; \
|
|
|
1359 } while (0)
|
|
|
1360 #define BYTE_ASCII_P(byte) 1
|
|
|
1361
|
|
|
1362 #endif /* ! MULE */
|
|
|
1363
|
|
|
1364 /************************************************************************/
|
|
|
1365 /* */
|
|
|
1366 /* higher-level buffer-position functions */
|
|
|
1367 /* */
|
|
|
1368 /************************************************************************/
|
|
|
1369
|
|
|
1370 /*----------------------------------------------------------------------*/
|
|
|
1371 /* Settor macros for important positions in a buffer */
|
|
|
1372 /*----------------------------------------------------------------------*/
|
|
|
1373
|
|
|
1374 /* Set beginning of accessible range of buffer. */
|
|
|
1375 #define SET_BOTH_BUF_BEGV(buf, val, bival) \
|
|
|
1376 do \
|
|
|
1377 { \
|
|
|
1378 (buf)->begv = (bival); \
|
|
|
1379 (buf)->bufbegv = (val); \
|
|
|
1380 } while (0)
|
|
|
1381
|
|
|
1382 /* Set end of accessible range of buffer. */
|
|
|
1383 #define SET_BOTH_BUF_ZV(buf, val, bival) \
|
|
|
1384 do \
|
|
|
1385 { \
|
|
|
1386 (buf)->zv = (bival); \
|
|
|
1387 (buf)->bufzv = (val); \
|
|
|
1388 } while (0)
|
|
|
1389
|
|
|
1390 /* Set point. */
|
|
|
1391 /* Since BEGV and ZV are almost never set, it's reasonable to enforce
|
|
|
1392 the restriction that the Bufpos and Bytind values must both be
|
|
|
1393 specified. However, point is set in lots and lots of places. So
|
|
|
1394 we provide the ability to specify both (for efficiency) or just
|
|
|
1395 one. */
|
|
|
1396 #define BOTH_BUF_SET_PT(buf, val, bival) set_buffer_point (buf, val, bival)
|
|
|
1397 #define BI_BUF_SET_PT(buf, bival) \
|
|
|
1398 BOTH_BUF_SET_PT (buf, bytind_to_bufpos (buf, bival), bival)
|
|
|
1399 #define BUF_SET_PT(buf, value) \
|
|
|
1400 BOTH_BUF_SET_PT (buf, value, bufpos_to_bytind (buf, value))
|
|
|
1401
|
|
|
1402
|
|
|
1403 #if 0 /* FSFmacs */
|
|
|
1404 /* These macros exist in FSFmacs because SET_PT() in FSFmacs incorrectly
|
|
|
1405 does too much stuff, such as moving out of invisible extents. */
|
|
|
1406 #define TEMP_SET_PT(position) (temp_set_point ((position), current_buffer))
|
|
|
1407 #define SET_BUF_PT(buf, value) ((buf)->pt = (value))
|
|
|
1408 #endif /* FSFmacs */
|
|
|
1409
|
|
|
1410 /*----------------------------------------------------------------------*/
|
|
|
1411 /* Miscellaneous buffer values */
|
|
|
1412 /*----------------------------------------------------------------------*/
|
|
|
1413
|
|
|
1414 /* Number of characters in buffer */
|
|
|
1415 #define BUF_SIZE(buf) (BUF_Z (buf) - BUF_BEG (buf))
|
|
|
1416
|
|
|
1417 /* Is this buffer narrowed? */
|
|
|
1418 #define BUF_NARROWED(buf) \
|
|
|
1419 ((BI_BUF_BEGV (buf) != BI_BUF_BEG (buf)) || \
|
|
|
1420 (BI_BUF_ZV (buf) != BI_BUF_Z (buf)))
|
|
|
1421
|
|
|
1422 /* Modification count. */
|
|
|
1423 #define BUF_MODIFF(buf) ((buf)->text->modiff)
|
|
|
1424
|
|
|
1425 /* Saved modification count. */
|
|
|
1426 #define BUF_SAVE_MODIFF(buf) ((buf)->text->save_modiff)
|
|
|
1427
|
|
|
1428 /* Face changed. */
|
|
|
1429 #define BUF_FACECHANGE(buf) ((buf)->face_change)
|
|
|
1430
|
|
|
1431 #define POINT_MARKER_P(marker) \
|
|
|
1432 (XMARKER (marker)->buffer != 0 && \
|
|
434
|
1433 EQ (marker, XMARKER (marker)->buffer->point_marker))
|
|
428
|
1434
|
|
|
1435 #define BUF_MARKERS(buf) ((buf)->markers)
|
|
|
1436
|
|
|
1437 /* WARNING:
|
|
|
1438
|
|
|
1439 The new definitions of CEILING_OF() and FLOOR_OF() differ semantically
|
|
|
1440 from the old ones (in FSF Emacs and XEmacs 19.11 and before).
|
|
|
1441 Conversion is as follows:
|
|
|
1442
|
|
|
1443 OLD_BI_CEILING_OF(n) = NEW_BI_CEILING_OF(n) - 1
|
|
|
1444 OLD_BI_FLOOR_OF(n) = NEW_BI_FLOOR_OF(n + 1)
|
|
|
1445
|
|
|
1446 The definitions were changed because the new definitions are more
|
|
|
1447 consistent with the way everything else works in Emacs.
|
|
|
1448 */
|
|
|
1449
|
|
|
1450 /* Properties of CEILING_OF and FLOOR_OF (also apply to BI_ variants):
|
|
|
1451
|
|
|
1452 1) FLOOR_OF (CEILING_OF (n)) = n
|
|
|
1453 CEILING_OF (FLOOR_OF (n)) = n
|
|
|
1454
|
|
|
1455 2) CEILING_OF (n) = n if and only if n = ZV
|
|
|
1456 FLOOR_OF (n) = n if and only if n = BEGV
|
|
|
1457
|
|
|
1458 3) CEILING_OF (CEILING_OF (n)) = ZV
|
|
|
1459 FLOOR_OF (FLOOR_OF (n)) = BEGV
|
|
|
1460
|
|
|
1461 4) The bytes in the regions
|
|
|
1462
|
|
|
1463 [BYTE_ADDRESS (n), BYTE_ADDRESS_BEFORE (CEILING_OF (n))]
|
|
|
1464
|
|
|
1465 and
|
|
|
1466
|
|
|
1467 [BYTE_ADDRESS (FLOOR_OF (n)), BYTE_ADDRESS_BEFORE (n)]
|
|
|
1468
|
|
|
1469 are contiguous.
|
|
|
1470 */
|
|
|
1471
|
|
|
1472
|
|
|
1473 /* Return the maximum index in the buffer it is safe to scan forwards
|
|
|
1474 past N to. This is used to prevent buffer scans from running into
|
|
|
1475 the gap (e.g. search.c). All characters between N and CEILING_OF(N)
|
|
|
1476 are located contiguous in memory. Note that the character *at*
|
|
|
1477 CEILING_OF(N) is not contiguous in memory. */
|
|
|
1478 #define BI_BUF_CEILING_OF(b, n) \
|
|
|
1479 ((n) < (b)->text->gpt && (b)->text->gpt < BI_BUF_ZV (b) ? \
|
|
|
1480 (b)->text->gpt : BI_BUF_ZV (b))
|
|
|
1481 #define BUF_CEILING_OF(b, n) \
|
|
|
1482 bytind_to_bufpos (b, BI_BUF_CEILING_OF (b, bufpos_to_bytind (b, n)))
|
|
|
1483
|
|
|
1484 /* Return the minimum index in the buffer it is safe to scan backwards
|
|
|
1485 past N to. All characters between FLOOR_OF(N) and N are located
|
|
|
1486 contiguous in memory. Note that the character *at* N may not be
|
|
|
1487 contiguous in memory. */
|
|
|
1488 #define BI_BUF_FLOOR_OF(b, n) \
|
|
|
1489 (BI_BUF_BEGV (b) < (b)->text->gpt && (b)->text->gpt < (n) ? \
|
|
|
1490 (b)->text->gpt : BI_BUF_BEGV (b))
|
|
|
1491 #define BUF_FLOOR_OF(b, n) \
|
|
|
1492 bytind_to_bufpos (b, BI_BUF_FLOOR_OF (b, bufpos_to_bytind (b, n)))
|
|
|
1493
|
|
|
1494 #define BI_BUF_CEILING_OF_IGNORE_ACCESSIBLE(b, n) \
|
|
|
1495 ((n) < (b)->text->gpt && (b)->text->gpt < BI_BUF_Z (b) ? \
|
|
|
1496 (b)->text->gpt : BI_BUF_Z (b))
|
|
|
1497 #define BUF_CEILING_OF_IGNORE_ACCESSIBLE(b, n) \
|
|
|
1498 bytind_to_bufpos \
|
|
|
1499 (b, BI_BUF_CEILING_OF_IGNORE_ACCESSIBLE (b, bufpos_to_bytind (b, n)))
|
|
|
1500
|
|
|
1501 #define BI_BUF_FLOOR_OF_IGNORE_ACCESSIBLE(b, n) \
|
|
|
1502 (BI_BUF_BEG (b) < (b)->text->gpt && (b)->text->gpt < (n) ? \
|
|
|
1503 (b)->text->gpt : BI_BUF_BEG (b))
|
|
|
1504 #define BUF_FLOOR_OF_IGNORE_ACCESSIBLE(b, n) \
|
|
|
1505 bytind_to_bufpos \
|
|
|
1506 (b, BI_BUF_FLOOR_OF_IGNORE_ACCESSIBLE (b, bufpos_to_bytind (b, n)))
|
|
|
1507
|
|
|
1508
|
|
|
1509 extern struct buffer *current_buffer;
|
|
|
1510
|
|
|
1511 /* This is the initial (startup) directory, as used for the *scratch* buffer.
|
|
|
1512 We're making this a global to make others aware of the startup directory.
|
|
|
1513 `initial_directory' is stored in external format.
|
|
|
1514 */
|
|
|
1515 extern char initial_directory[];
|
|
|
1516 extern void init_initial_directory (void); /* initialize initial_directory */
|
|
|
1517
|
|
|
1518 EXFUN (Fbuffer_disable_undo, 1);
|
|
|
1519 EXFUN (Fbuffer_modified_p, 1);
|
|
|
1520 EXFUN (Fbuffer_name, 1);
|
|
|
1521 EXFUN (Fcurrent_buffer, 0);
|
|
|
1522 EXFUN (Ferase_buffer, 1);
|
|
|
1523 EXFUN (Fget_buffer, 1);
|
|
|
1524 EXFUN (Fget_buffer_create, 1);
|
|
|
1525 EXFUN (Fget_file_buffer, 1);
|
|
|
1526 EXFUN (Fkill_buffer, 1);
|
|
|
1527 EXFUN (Fother_buffer, 3);
|
|
|
1528 EXFUN (Frecord_buffer, 1);
|
|
|
1529 EXFUN (Fset_buffer, 1);
|
|
|
1530 EXFUN (Fset_buffer_modified_p, 2);
|
|
|
1531
|
|
|
1532 extern Lisp_Object QSscratch, Qafter_change_function, Qafter_change_functions;
|
|
|
1533 extern Lisp_Object Qbefore_change_function, Qbefore_change_functions;
|
|
|
1534 extern Lisp_Object Qbuffer_or_string_p, Qdefault_directory, Qfirst_change_hook;
|
|
|
1535 extern Lisp_Object Qpermanent_local, Vafter_change_function;
|
|
|
1536 extern Lisp_Object Vafter_change_functions, Vbefore_change_function;
|
|
|
1537 extern Lisp_Object Vbefore_change_functions, Vbuffer_alist, Vbuffer_defaults;
|
|
|
1538 extern Lisp_Object Vinhibit_read_only, Vtransient_mark_mode;
|
|
|
1539
|
|
|
1540 /* This structure marks which slots in a buffer have corresponding
|
|
|
1541 default values in Vbuffer_defaults.
|
|
|
1542 Each such slot has a nonzero value in this structure.
|
|
|
1543 The value has only one nonzero bit.
|
|
|
1544
|
|
|
1545 When a buffer has its own local value for a slot,
|
|
|
1546 the bit for that slot (found in the same slot in this structure)
|
|
|
1547 is turned on in the buffer's local_var_flags slot.
|
|
|
1548
|
|
|
1549 If a slot in this structure is zero, then even though there may
|
|
|
1550 be a DEFVAR_BUFFER_LOCAL for the slot, there is no default value for it;
|
|
|
1551 and the corresponding slot in Vbuffer_defaults is not used. */
|
|
|
1552
|
|
|
1553 extern struct buffer buffer_local_flags;
|
|
|
1554
|
|
|
1555
|
|
|
1556 /* Allocation of buffer data. */
|
|
|
1557
|
|
|
1558 #ifdef REL_ALLOC
|
|
|
1559
|
|
440
|
1560 char *r_alloc (unsigned char **, size_t);
|
|
|
1561 char *r_re_alloc (unsigned char **, size_t);
|
|
428
|
1562 void r_alloc_free (unsigned char **);
|
|
|
1563
|
|
|
1564 #define BUFFER_ALLOC(data, size) \
|
|
|
1565 ((Bufbyte *) r_alloc ((unsigned char **) &data, (size) * sizeof(Bufbyte)))
|
|
|
1566 #define BUFFER_REALLOC(data, size) \
|
|
|
1567 ((Bufbyte *) r_re_alloc ((unsigned char **) &data, (size) * sizeof(Bufbyte)))
|
|
|
1568 #define BUFFER_FREE(data) r_alloc_free ((unsigned char **) &(data))
|
|
|
1569 #define R_ALLOC_DECLARE(var,data) r_alloc_declare (&(var), data)
|
|
|
1570
|
|
|
1571 #else /* !REL_ALLOC */
|
|
|
1572
|
|
|
1573 #define BUFFER_ALLOC(data,size)\
|
|
|
1574 (data = xnew_array (Bufbyte, size))
|
|
|
1575 #define BUFFER_REALLOC(data,size)\
|
|
|
1576 ((Bufbyte *) xrealloc (data, (size) * sizeof(Bufbyte)))
|
|
|
1577 /* Avoid excess parentheses, or syntax errors may rear their heads. */
|
|
|
1578 #define BUFFER_FREE(data) xfree (data)
|
|
|
1579 #define R_ALLOC_DECLARE(var,data)
|
|
|
1580
|
|
|
1581 #endif /* !REL_ALLOC */
|
|
|
1582
|
|
|
1583 extern Lisp_Object Vbuffer_alist;
|
|
|
1584 void set_buffer_internal (struct buffer *b);
|
|
|
1585 struct buffer *decode_buffer (Lisp_Object buffer, int allow_string);
|
|
|
1586
|
|
|
1587 /* from editfns.c */
|
|
|
1588 void widen_buffer (struct buffer *b, int no_clip);
|
|
|
1589 int beginning_of_line_p (struct buffer *b, Bufpos pt);
|
|
|
1590
|
|
|
1591 /* from insdel.c */
|
|
|
1592 void set_buffer_point (struct buffer *buf, Bufpos pos, Bytind bipos);
|
|
|
1593 void find_charsets_in_bufbyte_string (unsigned char *charsets,
|
|
442
|
1594 const Bufbyte *str,
|
|
428
|
1595 Bytecount len);
|
|
|
1596 void find_charsets_in_emchar_string (unsigned char *charsets,
|
|
442
|
1597 const Emchar *str,
|
|
428
|
1598 Charcount len);
|
|
442
|
1599 int bufbyte_string_displayed_columns (const Bufbyte *str, Bytecount len);
|
|
|
1600 int emchar_string_displayed_columns (const Emchar *str, Charcount len);
|
|
|
1601 void convert_bufbyte_string_into_emchar_dynarr (const Bufbyte *str,
|
|
428
|
1602 Bytecount len,
|
|
|
1603 Emchar_dynarr *dyn);
|
|
442
|
1604 Charcount convert_bufbyte_string_into_emchar_string (const Bufbyte *str,
|
|
428
|
1605 Bytecount len,
|
|
|
1606 Emchar *arr);
|
|
|
1607 void convert_emchar_string_into_bufbyte_dynarr (Emchar *arr, int nels,
|
|
|
1608 Bufbyte_dynarr *dyn);
|
|
|
1609 Bufbyte *convert_emchar_string_into_malloced_string (Emchar *arr, int nels,
|
|
|
1610 Bytecount *len_out);
|
|
|
1611 /* from marker.c */
|
|
|
1612 void init_buffer_markers (struct buffer *b);
|
|
|
1613 void uninit_buffer_markers (struct buffer *b);
|
|
|
1614
|
|
|
1615 /* flags for get_buffer_pos_char(), get_buffer_range_char(), etc. */
|
|
|
1616 /* At most one of GB_COERCE_RANGE and GB_NO_ERROR_IF_BAD should be
|
|
|
1617 specified. At most one of GB_NEGATIVE_FROM_END and GB_NO_ERROR_IF_BAD
|
|
|
1618 should be specified. */
|
|
|
1619
|
|
|
1620 #define GB_ALLOW_PAST_ACCESSIBLE (1 << 0)
|
|
|
1621 #define GB_ALLOW_NIL (1 << 1)
|
|
|
1622 #define GB_CHECK_ORDER (1 << 2)
|
|
|
1623 #define GB_COERCE_RANGE (1 << 3)
|
|
|
1624 #define GB_NO_ERROR_IF_BAD (1 << 4)
|
|
|
1625 #define GB_NEGATIVE_FROM_END (1 << 5)
|
|
|
1626 #define GB_HISTORICAL_STRING_BEHAVIOR (GB_NEGATIVE_FROM_END | GB_ALLOW_NIL)
|
|
|
1627
|
|
|
1628 Bufpos get_buffer_pos_char (struct buffer *b, Lisp_Object pos,
|
|
|
1629 unsigned int flags);
|
|
|
1630 Bytind get_buffer_pos_byte (struct buffer *b, Lisp_Object pos,
|
|
|
1631 unsigned int flags);
|
|
|
1632 void get_buffer_range_char (struct buffer *b, Lisp_Object from, Lisp_Object to,
|
|
|
1633 Bufpos *from_out, Bufpos *to_out,
|
|
|
1634 unsigned int flags);
|
|
|
1635 void get_buffer_range_byte (struct buffer *b, Lisp_Object from, Lisp_Object to,
|
|
|
1636 Bytind *from_out, Bytind *to_out,
|
|
|
1637 unsigned int flags);
|
|
|
1638 Charcount get_string_pos_char (Lisp_Object string, Lisp_Object pos,
|
|
|
1639 unsigned int flags);
|
|
|
1640 Bytecount get_string_pos_byte (Lisp_Object string, Lisp_Object pos,
|
|
|
1641 unsigned int flags);
|
|
|
1642 void get_string_range_char (Lisp_Object string, Lisp_Object from,
|
|
|
1643 Lisp_Object to, Charcount *from_out,
|
|
|
1644 Charcount *to_out, unsigned int flags);
|
|
|
1645 void get_string_range_byte (Lisp_Object string, Lisp_Object from,
|
|
|
1646 Lisp_Object to, Bytecount *from_out,
|
|
|
1647 Bytecount *to_out, unsigned int flags);
|
|
|
1648 Bufpos get_buffer_or_string_pos_char (Lisp_Object object, Lisp_Object pos,
|
|
|
1649 unsigned int flags);
|
|
|
1650 Bytind get_buffer_or_string_pos_byte (Lisp_Object object, Lisp_Object pos,
|
|
|
1651 unsigned int flags);
|
|
|
1652 void get_buffer_or_string_range_char (Lisp_Object object, Lisp_Object from,
|
|
|
1653 Lisp_Object to, Bufpos *from_out,
|
|
|
1654 Bufpos *to_out, unsigned int flags);
|
|
|
1655 void get_buffer_or_string_range_byte (Lisp_Object object, Lisp_Object from,
|
|
|
1656 Lisp_Object to, Bytind *from_out,
|
|
|
1657 Bytind *to_out, unsigned int flags);
|
|
|
1658 Bufpos buffer_or_string_accessible_begin_char (Lisp_Object object);
|
|
|
1659 Bufpos buffer_or_string_accessible_end_char (Lisp_Object object);
|
|
|
1660 Bytind buffer_or_string_accessible_begin_byte (Lisp_Object object);
|
|
|
1661 Bytind buffer_or_string_accessible_end_byte (Lisp_Object object);
|
|
|
1662 Bufpos buffer_or_string_absolute_begin_char (Lisp_Object object);
|
|
|
1663 Bufpos buffer_or_string_absolute_end_char (Lisp_Object object);
|
|
|
1664 Bytind buffer_or_string_absolute_begin_byte (Lisp_Object object);
|
|
|
1665 Bytind buffer_or_string_absolute_end_byte (Lisp_Object object);
|
|
|
1666 void record_buffer (Lisp_Object buf);
|
|
|
1667 Lisp_Object get_buffer (Lisp_Object name,
|
|
|
1668 int error_if_deleted_or_does_not_exist);
|
|
|
1669 int map_over_sharing_buffers (struct buffer *buf,
|
|
|
1670 int (*mapfun) (struct buffer *buf,
|
|
|
1671 void *closure),
|
|
|
1672 void *closure);
|
|
|
1673
|
|
|
1674
|
|
|
1675 /************************************************************************/
|
|
|
1676 /* Case conversion */
|
|
|
1677 /************************************************************************/
|
|
|
1678
|
|
|
1679 /* A "trt" table is a mapping from characters to other characters,
|
|
|
1680 typically used to convert between uppercase and lowercase. For
|
|
|
1681 compatibility reasons, trt tables are currently in the form of
|
|
|
1682 a Lisp string of 256 characters, specifying the conversion for each
|
|
|
1683 of the first 256 Emacs characters (i.e. the 256 Latin-1 characters).
|
|
|
1684 This should be generalized at some point to support conversions for
|
|
|
1685 all of the allowable Mule characters.
|
|
|
1686 */
|
|
|
1687
|
|
|
1688 /* The _1 macros are named as such because they assume that you have
|
|
|
1689 already guaranteed that the character values are all in the range
|
|
|
1690 0 - 255. Bad lossage will happen otherwise. */
|
|
|
1691
|
|
446
|
1692 #define MAKE_TRT_TABLE() Fmake_char_table (Qgeneric)
|
|
|
1693 INLINE_HEADER Emchar TRT_TABLE_CHAR_1 (Lisp_Object table, Emchar c);
|
|
|
1694 INLINE_HEADER Emchar
|
|
|
1695 TRT_TABLE_CHAR_1 (Lisp_Object table, Emchar ch)
|
|
|
1696 {
|
|
|
1697 Lisp_Object TRT_char;
|
|
|
1698 TRT_char = get_char_table (ch, XCHAR_TABLE (table));
|
|
|
1699 if (NILP (TRT_char))
|
|
|
1700 return ch;
|
|
|
1701 else
|
|
|
1702 return XCHAR (TRT_char);
|
|
|
1703 }
|
|
|
1704 #define SET_TRT_TABLE_CHAR_1(table, ch1, ch2) \
|
|
|
1705 Fput_char_table (make_char (ch1), make_char (ch2), table);
|
|
428
|
1706
|
|
442
|
1707 INLINE_HEADER Emchar TRT_TABLE_OF (Lisp_Object trt, Emchar c);
|
|
|
1708 INLINE_HEADER Emchar
|
|
428
|
1709 TRT_TABLE_OF (Lisp_Object trt, Emchar c)
|
|
|
1710 {
|
|
446
|
1711 return TRT_TABLE_CHAR_1 (trt, c);
|
|
428
|
1712 }
|
|
|
1713
|
|
|
1714 /* Macros used below. */
|
|
446
|
1715 #define DOWNCASE_TABLE_OF(buf, c) \
|
|
|
1716 TRT_TABLE_OF (XCASE_TABLE_DOWNCASE (buf->case_table), c)
|
|
|
1717 #define UPCASE_TABLE_OF(buf, c) \
|
|
|
1718 TRT_TABLE_OF (XCASE_TABLE_UPCASE (buf->case_table), c)
|
|
428
|
1719
|
|
|
1720 /* 1 if CH is upper case. */
|
|
|
1721
|
|
442
|
1722 INLINE_HEADER int UPPERCASEP (struct buffer *buf, Emchar ch);
|
|
|
1723 INLINE_HEADER int
|
|
428
|
1724 UPPERCASEP (struct buffer *buf, Emchar ch)
|
|
|
1725 {
|
|
|
1726 return DOWNCASE_TABLE_OF (buf, ch) != ch;
|
|
|
1727 }
|
|
|
1728
|
|
|
1729 /* 1 if CH is lower case. */
|
|
|
1730
|
|
442
|
1731 INLINE_HEADER int LOWERCASEP (struct buffer *buf, Emchar ch);
|
|
|
1732 INLINE_HEADER int
|
|
428
|
1733 LOWERCASEP (struct buffer *buf, Emchar ch)
|
|
|
1734 {
|
|
|
1735 return (UPCASE_TABLE_OF (buf, ch) != ch &&
|
|
|
1736 DOWNCASE_TABLE_OF (buf, ch) == ch);
|
|
|
1737 }
|
|
|
1738
|
|
|
1739 /* 1 if CH is neither upper nor lower case. */
|
|
|
1740
|
|
442
|
1741 INLINE_HEADER int NOCASEP (struct buffer *buf, Emchar ch);
|
|
|
1742 INLINE_HEADER int
|
|
428
|
1743 NOCASEP (struct buffer *buf, Emchar ch)
|
|
|
1744 {
|
|
|
1745 return UPCASE_TABLE_OF (buf, ch) == ch;
|
|
|
1746 }
|
|
|
1747
|
|
|
1748 /* Upcase a character, or make no change if that cannot be done. */
|
|
|
1749
|
|
442
|
1750 INLINE_HEADER Emchar UPCASE (struct buffer *buf, Emchar ch);
|
|
|
1751 INLINE_HEADER Emchar
|
|
428
|
1752 UPCASE (struct buffer *buf, Emchar ch)
|
|
|
1753 {
|
|
|
1754 return (DOWNCASE_TABLE_OF (buf, ch) == ch) ? UPCASE_TABLE_OF (buf, ch) : ch;
|
|
|
1755 }
|
|
|
1756
|
|
|
1757 /* Upcase a character known to be not upper case. Unused. */
|
|
|
1758
|
|
|
1759 #define UPCASE1(buf, ch) UPCASE_TABLE_OF (buf, ch)
|
|
|
1760
|
|
|
1761 /* Downcase a character, or make no change if that cannot be done. */
|
|
|
1762
|
|
|
1763 #define DOWNCASE(buf, ch) DOWNCASE_TABLE_OF (buf, ch)
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|
|
1764
|
|
444
|
1765 /************************************************************************/
|
|
|
1766 /* Lisp string representation convenience functions */
|
|
|
1767 /************************************************************************/
|
|
|
1768 /* Because the representation of internally formatted data is subject to change,
|
|
|
1769 It's bad style to do something like strcmp (XSTRING_DATA (s), "foo")
|
|
|
1770 Instead, use the portable: bufbyte_strcmp (XSTRING_DATA (s), "foo")
|
|
|
1771 or bufbyte_memcmp (XSTRING_DATA (s), "foo", 3) */
|
|
|
1772
|
|
|
1773 /* Like strcmp, except first arg points at internally formatted data,
|
|
|
1774 while the second points at a string of only ASCII chars. */
|
|
|
1775 INLINE_HEADER int
|
|
|
1776 bufbyte_strcmp (const Bufbyte *bp, const char *ascii_string);
|
|
|
1777 INLINE_HEADER int
|
|
|
1778 bufbyte_strcmp (const Bufbyte *bp, const char *ascii_string)
|
|
|
1779 {
|
|
|
1780 #ifdef MULE
|
|
|
1781 while (1)
|
|
|
1782 {
|
|
|
1783 int diff;
|
|
|
1784 type_checking_assert (BYTE_ASCII_P (*ascii_string));
|
|
|
1785 if ((diff = charptr_emchar (bp) - *(Bufbyte *) ascii_string) != 0)
|
|
|
1786 return diff;
|
|
|
1787 if (*ascii_string == '\0')
|
|
|
1788 return 0;
|
|
|
1789 ascii_string++;
|
|
|
1790 INC_CHARPTR (bp);
|
|
|
1791 }
|
|
|
1792 #else
|
|
|
1793 return strcmp ((char *)bp, ascii_string);
|
|
|
1794 #endif
|
|
|
1795 }
|
|
|
1796
|
|
|
1797
|
|
|
1798 /* Like memcmp, except first arg points at internally formatted data,
|
|
|
1799 while the second points at a string of only ASCII chars. */
|
|
|
1800 INLINE_HEADER int
|
|
|
1801 bufbyte_memcmp (const Bufbyte *bp, const char *ascii_string, size_t len);
|
|
|
1802 INLINE_HEADER int
|
|
|
1803 bufbyte_memcmp (const Bufbyte *bp, const char *ascii_string, size_t len)
|
|
|
1804 {
|
|
|
1805 #ifdef MULE
|
|
|
1806 while (len--)
|
|
|
1807 {
|
|
|
1808 int diff = charptr_emchar (bp) - *(Bufbyte *) ascii_string;
|
|
|
1809 type_checking_assert (BYTE_ASCII_P (*ascii_string));
|
|
|
1810 if (diff != 0)
|
|
|
1811 return diff;
|
|
|
1812 ascii_string++;
|
|
|
1813 INC_CHARPTR (bp);
|
|
|
1814 }
|
|
|
1815 return 0;
|
|
|
1816 #else
|
|
|
1817 return memcmp (bp, ascii_string, len);
|
|
|
1818 #endif
|
|
|
1819 }
|
|
|
1820
|
|
440
|
1821 #endif /* INCLUDED_buffer_h_ */
|
