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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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2367
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5 Copyright (C) 2001, 2002, 2004 Ben Wing.
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428
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6
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7 This file is part of XEmacs.
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8
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9 XEmacs is free software; you can redistribute it and/or modify it
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10 under the terms of the GNU General Public License as published by the
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11 Free Software Foundation; either version 2, or (at your option) any
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12 later version.
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13
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14 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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17 for more details.
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18
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19 You should have received a copy of the GNU General Public License
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20 along with XEmacs; see the file COPYING. If not, write to
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21 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 Boston, MA 02111-1307, USA. */
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23
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24 /* Synched up with: FSF 19.30. */
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25
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26 /* Authorship:
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27
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28 FSF: long ago.
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29 JWZ: separated out bufslots.h, early in Lemacs.
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30 Ben Wing: almost completely rewritten for Mule, 19.12.
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31 */
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32
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440
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33 #ifndef INCLUDED_buffer_h_
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34 #define INCLUDED_buffer_h_
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428
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35
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446
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36 #include "casetab.h"
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37 #include "chartab.h"
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38
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428
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39 /************************************************************************/
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40 /* */
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41 /* definition of Lisp buffer object */
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42 /* */
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43 /************************************************************************/
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44
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665
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45 /* Note: we keep both Bytebpos and Charbpos versions of some of the
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428
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46 important buffer positions because they are accessed so much.
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47 If we didn't do this, we would constantly be invalidating the
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665
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48 charbpos<->bytebpos cache under Mule.
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428
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49
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50 Note that under non-Mule, both versions will always be the
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51 same so we don't really need to keep track of them. But it
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52 simplifies the logic to go ahead and do so all the time and
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53 the memory loss is insignificant. */
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54
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55 /* Formerly, it didn't much matter what went inside the struct buffer_text
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56 and what went outside it. Now it does, with the advent of "indirect
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57 buffers" that share text with another buffer. An indirect buffer
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58 shares the same *text* as another buffer, but has its own buffer-local
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59 variables, its own accessible region, and its own markers and extents.
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60 (Due to the nature of markers, it doesn't actually matter much whether
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61 we stick them inside or out of the struct buffer_text -- the user won't
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62 notice any difference -- but we go ahead and put them outside for
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63 consistency and overall saneness of algorithm.)
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64
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65 FSFmacs gets away with not maintaining any "children" pointers from
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66 a buffer to the indirect buffers that refer to it by putting the
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67 markers inside of the struct buffer_text, using markers to keep track
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68 of BEGV and ZV in indirect buffers, and relying on the fact that
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69 all intervals (text properties and overlays) use markers for their
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70 start and end points. We don't do this for extents (markers are
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71 inefficient anyway and take up space), so we have to maintain
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72 children pointers. This is not terribly hard, though, and the
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73 code to maintain this is just like the code already present in
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74 extent-parent and extent-children.
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75 */
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76
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2367
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77 #define NUM_CACHED_POSITIONS 50
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78 #define NUM_MOVED_POSITIONS 10
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79
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428
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80 struct buffer_text
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81 {
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867
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82 Ibyte *beg; /* Actual address of buffer contents. */
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665
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83 Bytebpos gpt; /* Index of gap in buffer. */
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84 Charbpos bufgpt; /* Equivalent as a Charbpos. */
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665
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85 Bytebpos z; /* Index of end of buffer. */
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86 Charbpos bufz; /* Equivalent as a Charbpos. */
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665
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87 Bytecount gap_size;/* Size of buffer's gap */
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88 Bytecount end_gap_size;/* Size of buffer's end gap */
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428
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89 long modiff; /* This counts buffer-modification events
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90 for this buffer. It is incremented for
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91 each such event, and never otherwise
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92 changed. */
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93 long save_modiff; /* Previous value of modiff, as of last
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94 time buffer visited or saved a file. */
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95
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96 #ifdef MULE
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2367
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97
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98 #ifdef OLD_BYTE_CHAR
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771
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99 /* We keep track of a "known" region for very fast access. This
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100 information is text-only so it goes here. We update this at each
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101 change to the buffer, so if it's entirely ASCII, these will always
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102 contain the minimum and maximum positions of the buffer. */
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665
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103 Charbpos mule_bufmin, mule_bufmax;
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104 Bytebpos mule_bytmin, mule_bytmax;
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428
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105 int mule_shifter, mule_three_p;
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2367
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106 #endif
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428
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107
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2367
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108 /* And we also cache NUM_CACHED_POSITIONS positions for fairly fast
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109 access near those positions. */
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110 Charbpos mule_charbpos_cache[NUM_CACHED_POSITIONS];
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111 Bytebpos mule_bytebpos_cache[NUM_CACHED_POSITIONS];
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112 int next_cache_pos;
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113
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114 Charbpos cached_charpos;
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115 Bytebpos cached_bytepos;
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771
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116
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826
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117 /* True if all chars fit into one byte;
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118 == (format == FORMAT_8_BIT_FIXED ||
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119 (format == FORMAT_DEFAULT && num_ascii_chars == bufz - 1))
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120 kept around to speed up (slightly?) the byte-char conversion routines. */
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121 int entirely_one_byte_p;
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122 /* Number of ASCII chars in buffer (0 - 127) */
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123 Charcount num_ascii_chars;
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124 /* Number of chars in buffer that would fit in an 8-bit-fixed buffer. */
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125 Charcount num_8_bit_fixed_chars;
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126 /* Number of chars in buffer that would fit in an 16-bit-fixed buffer. */
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127 Charcount num_16_bit_fixed_chars;
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128
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129 /* Currently we only handle 8 bit fixed and default */
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130 Internal_Format format;
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2367
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131 #endif /* MULE */
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428
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132
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133 /* Similar to the above, we keep track of positions for which line
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134 number has last been calculated. See line-number.c. */
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135 Lisp_Object line_number_cache;
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136
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137 /* Change data that goes with the text. */
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138 struct buffer_text_change_data *changes;
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139 };
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140
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141 struct buffer
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142 {
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143 struct lcrecord_header header;
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144
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145 /* This structure holds the coordinates of the buffer contents
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146 in ordinary buffers. In indirect buffers, this is not used. */
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147 struct buffer_text own_text;
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148
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149 /* This points to the `struct buffer_text' that is used for this buffer.
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150 In an ordinary buffer, this is the own_text field above.
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151 In an indirect buffer, this is the own_text field of another buffer. */
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152 struct buffer_text *text;
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153
|
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665
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154 Bytebpos pt; /* Position of point in buffer. */
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155 Charbpos bufpt; /* Equivalent as a Charbpos. */
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156 Bytebpos begv; /* Index of beginning of accessible range. */
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157 Charbpos bufbegv; /* Equivalent as a Charbpos. */
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158 Bytebpos zv; /* Index of end of accessible range. */
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159 Charbpos bufzv; /* Equivalent as a Charbpos. */
|
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428
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160
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161 int face_change; /* This is set when a change in how the text should
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162 be displayed (e.g., font, color) is made. */
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163
|
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448
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164 /* Whether buffer specific face is specified. */
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165 int buffer_local_face_property;
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166
|
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428
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167 /* change data indicating what portion of the text has changed
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168 since the last time this was reset. Used by redisplay.
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169 Logically we should keep this with the text structure, but
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170 redisplay resets it for each buffer individually and we don't
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171 want interference between an indirect buffer and its base
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172 buffer. */
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173 struct each_buffer_change_data *changes;
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174
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175 #ifdef REGION_CACHE_NEEDS_WORK
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176 /* If the long line scan cache is enabled (i.e. the buffer-local
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177 variable cache-long-line-scans is non-nil), newline_cache
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178 points to the newline cache, and width_run_cache points to the
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179 width run cache.
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180
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181 The newline cache records which stretches of the buffer are
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182 known *not* to contain newlines, so that they can be skipped
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183 quickly when we search for newlines.
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184
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185 The width run cache records which stretches of the buffer are
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186 known to contain characters whose widths are all the same. If
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187 the width run cache maps a character to a value > 0, that value
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188 is the character's width; if it maps a character to zero, we
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189 don't know what its width is. This allows compute_motion to
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190 process such regions very quickly, using algebra instead of
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191 inspecting each character. See also width_table, below. */
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192 struct region_cache *newline_cache;
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193 struct region_cache *width_run_cache;
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194 #endif /* REGION_CACHE_NEEDS_WORK */
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195
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196 /* The markers that refer to this buffer. This is actually a single
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197 marker -- successive elements in its marker `chain' are the other
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198 markers referring to this buffer */
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440
|
199 Lisp_Marker *markers;
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428
|
200
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201 /* The buffer's extent info. This is its own type, an extent-info
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202 object (done this way for ease in marking / finalizing). */
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203 Lisp_Object extent_info;
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204
|
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826
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205 /* The buffer's syntax cache. This caches a known region where the
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206 `syntax-table' property is unchanged, for quick lookup in the routines
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207 that scan a buffer looking for a particular syntax (regex routines,
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208 parse-partial-sexp, etc.). */
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209 struct syntax_cache *syntax_cache;
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210
|
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428
|
211 /* ----------------------------------------------------------------- */
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|
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212 /* All the stuff above this line is the responsibility of insdel.c,
|
|
826
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213 with some help from marker.c, extents.c and syntax.c.
|
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428
|
214 All the stuff below this line is the responsibility of buffer.c. */
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215
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|
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216 /* In an indirect buffer, this points to the base buffer.
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217 In an ordinary buffer, it is 0.
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218 We DO mark through this slot. */
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219 struct buffer *base_buffer;
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220
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221 /* List of indirect buffers whose base is this buffer.
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222 If we are an indirect buffer, this will be nil.
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223 Do NOT mark through this. */
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224 Lisp_Object indirect_children;
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225
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|
|
226 /* Flags saying which DEFVAR_PER_BUFFER variables
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227 are local to this buffer. */
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|
|
228 int local_var_flags;
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229
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|
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230 /* Set to the modtime of the visited file when read or written.
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231 -1 means visited file was nonexistent.
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232 0 means visited file modtime unknown; in no case complain
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233 about any mismatch on next save attempt. */
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|
|
234 int modtime;
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|
235
|
|
|
236 /* the value of text->modiff at the last auto-save. */
|
|
442
|
237 long auto_save_modified;
|
|
428
|
238
|
|
|
239 /* The time at which we detected a failure to auto-save,
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|
|
240 Or -1 if we didn't have a failure. */
|
|
|
241 int auto_save_failure_time;
|
|
|
242
|
|
|
243 /* Position in buffer at which display started
|
|
|
244 the last time this buffer was displayed. */
|
|
|
245 int last_window_start;
|
|
|
246
|
|
|
247 /* Everything from here down must be a Lisp_Object */
|
|
|
248
|
|
1204
|
249 #define MARKED_SLOT(x) Lisp_Object x;
|
|
428
|
250 #include "bufslots.h"
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|
|
251 #undef MARKED_SLOT
|
|
|
252 };
|
|
|
253
|
|
|
254 DECLARE_LRECORD (buffer, struct buffer);
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|
|
255 #define XBUFFER(x) XRECORD (x, buffer, struct buffer)
|
|
617
|
256 #define wrap_buffer(p) wrap_record (p, buffer)
|
|
428
|
257 #define BUFFERP(x) RECORDP (x, buffer)
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|
|
258 #define CHECK_BUFFER(x) CHECK_RECORD (x, buffer)
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|
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259 #define CONCHECK_BUFFER(x) CONCHECK_RECORD (x, buffer)
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260
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|
|
261 #define BUFFER_LIVE_P(b) (!NILP ((b)->name))
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|
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262
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|
|
263 #define CHECK_LIVE_BUFFER(x) do { \
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264 CHECK_BUFFER (x); \
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|
|
265 if (!BUFFER_LIVE_P (XBUFFER (x))) \
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|
|
266 dead_wrong_type_argument (Qbuffer_live_p, (x)); \
|
|
|
267 } while (0)
|
|
|
268
|
|
|
269 #define CONCHECK_LIVE_BUFFER(x) do { \
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|
|
270 CONCHECK_BUFFER (x); \
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|
|
271 if (!BUFFER_LIVE_P (XBUFFER (x))) \
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|
|
272 x = wrong_type_argument (Qbuffer_live_p, (x)); \
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|
|
273 } while (0)
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|
|
274
|
|
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275
|
|
|
276 #define BUFFER_BASE_BUFFER(b) ((b)->base_buffer ? (b)->base_buffer : (b))
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|
|
277
|
|
|
278 /* Map over buffers sharing the same text as MPS_BUF. MPS_BUFVAR is a
|
|
|
279 variable that gets the buffer values (beginning with the base
|
|
|
280 buffer, then the children), and MPS_BUFCONS should be a temporary
|
|
|
281 Lisp_Object variable. */
|
|
647
|
282 #define MAP_INDIRECT_BUFFERS(mps_buf, mps_bufvar, mps_bufcons) \
|
|
|
283 for (mps_bufcons = Qunbound, \
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|
|
284 mps_bufvar = BUFFER_BASE_BUFFER (mps_buf); \
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|
|
285 UNBOUNDP (mps_bufcons) ? \
|
|
|
286 (mps_bufcons = mps_bufvar->indirect_children, \
|
|
|
287 1) \
|
|
|
288 : (!NILP (mps_bufcons) \
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|
|
289 && (mps_bufvar = XBUFFER (XCAR (mps_bufcons)), 1) \
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|
|
290 && (mps_bufcons = XCDR (mps_bufcons), 1)); \
|
|
428
|
291 )
|
|
|
292
|
|
|
293
|
|
826
|
294 /* All macros below follow the three golden rules of macros (see text.h),
|
|
|
295 with the following exception:
|
|
|
296
|
|
|
297 -- 'struct buffer *' arguments can be evaluated more than once.
|
|
|
298 */
|
|
|
299
|
|
428
|
300 /*----------------------------------------------------------------------*/
|
|
|
301 /* Accessor macros for important positions in a buffer */
|
|
|
302 /*----------------------------------------------------------------------*/
|
|
|
303
|
|
|
304 /* We put them here because some stuff below wants them before the
|
|
|
305 place where we would normally put them. */
|
|
|
306
|
|
|
307 /* None of these are lvalues. Use the settor macros below to change
|
|
|
308 the positions. */
|
|
|
309
|
|
|
310 /* Beginning of buffer. */
|
|
826
|
311 #define BYTE_BUF_BEG(buf) ((Bytebpos) 1)
|
|
665
|
312 #define BUF_BEG(buf) ((Charbpos) 1)
|
|
428
|
313
|
|
|
314 /* Beginning of accessible range of buffer. */
|
|
826
|
315 #define BYTE_BUF_BEGV(buf) ((buf)->begv + 0)
|
|
428
|
316 #define BUF_BEGV(buf) ((buf)->bufbegv + 0)
|
|
|
317
|
|
|
318 /* End of accessible range of buffer. */
|
|
826
|
319 #define BYTE_BUF_ZV(buf) ((buf)->zv + 0)
|
|
428
|
320 #define BUF_ZV(buf) ((buf)->bufzv + 0)
|
|
|
321
|
|
|
322 /* End of buffer. */
|
|
826
|
323 #define BYTE_BUF_Z(buf) ((buf)->text->z + 0)
|
|
428
|
324 #define BUF_Z(buf) ((buf)->text->bufz + 0)
|
|
|
325
|
|
2367
|
326 /* Gap location. */
|
|
|
327 #define BYTE_BUF_GPT(buf) ((buf)->text->gpt + 0)
|
|
|
328 #define BUF_GPT(buf) ((buf)->text->bufgpt + 0)
|
|
|
329
|
|
428
|
330 /* Point. */
|
|
826
|
331 #define BYTE_BUF_PT(buf) ((buf)->pt + 0)
|
|
428
|
332 #define BUF_PT(buf) ((buf)->bufpt + 0)
|
|
|
333
|
|
826
|
334 /* Internal format of buffer. */
|
|
|
335 #ifdef MULE
|
|
|
336 #define BUF_FORMAT(buf) ((buf)->text->format)
|
|
|
337 #else
|
|
|
338 #define BUF_FORMAT(buf) FORMAT_DEFAULT
|
|
|
339 #endif
|
|
|
340
|
|
428
|
341 /*----------------------------------------------------------------------*/
|
|
826
|
342 /* Validating byte positions */
|
|
428
|
343 /*----------------------------------------------------------------------*/
|
|
|
344
|
|
826
|
345 /* Address of byte at position POS in buffer, no error checking. */
|
|
|
346 DECLARE_INLINE_HEADER (
|
|
867
|
347 Ibyte *
|
|
826
|
348 BYTE_BUF_BYTE_ADDRESS_NO_VERIFY (struct buffer *buf, Bytebpos pos)
|
|
|
349 )
|
|
428
|
350 {
|
|
|
351 return (buf->text->beg +
|
|
|
352 ((pos >= buf->text->gpt ? (pos + buf->text->gap_size) : pos)
|
|
|
353 - 1));
|
|
|
354 }
|
|
|
355
|
|
826
|
356 /* Given a byte position, does it point to the beginning of a character?
|
|
|
357 */
|
|
|
358 #ifdef MULE
|
|
|
359 DECLARE_INLINE_HEADER (
|
|
|
360 int
|
|
|
361 VALID_BYTEBPOS_P (struct buffer *buf, Bytebpos x)
|
|
|
362 )
|
|
428
|
363 {
|
|
826
|
364 switch (BUF_FORMAT (buf))
|
|
|
365 {
|
|
|
366 case FORMAT_DEFAULT:
|
|
867
|
367 return ibyte_first_byte_p (*BYTE_BUF_BYTE_ADDRESS_NO_VERIFY (buf, x));
|
|
826
|
368 case FORMAT_16_BIT_FIXED:
|
|
|
369 return ((x - 1) & 1) == 0;
|
|
|
370 case FORMAT_32_BIT_FIXED:
|
|
|
371 return ((x - 1) & 3) == 0;
|
|
|
372 default:
|
|
|
373 return 1;
|
|
|
374 }
|
|
428
|
375 }
|
|
|
376 #else
|
|
665
|
377 # define VALID_BYTEBPOS_P(buf, x) 1
|
|
428
|
378 #endif
|
|
|
379
|
|
826
|
380 /* If error-checking is enabled, assert that the given char position is
|
|
|
381 within range. Otherwise, do nothing.
|
|
|
382 */
|
|
|
383 # define ASSERT_VALID_CHARBPOS_UNSAFE(buf, x) do { \
|
|
|
384 text_checking_assert (BUFFER_LIVE_P (buf)); \
|
|
|
385 text_checking_assert ((x) >= BUF_BEG (buf) && x <= BUF_Z (buf)); \
|
|
428
|
386 } while (0)
|
|
826
|
387
|
|
|
388 /* If error-checking is enabled, assert that the given byte position is
|
|
|
389 within range and points to the beginning of a character or to the end of
|
|
|
390 the buffer. Otherwise, do nothing.
|
|
|
391 */
|
|
|
392 # define ASSERT_VALID_BYTEBPOS_UNSAFE(buf, x) do { \
|
|
|
393 text_checking_assert (BUFFER_LIVE_P (buf)); \
|
|
|
394 text_checking_assert ((x) >= BYTE_BUF_BEG (buf) && x <= BYTE_BUF_Z (buf)); \
|
|
|
395 text_checking_assert (VALID_BYTEBPOS_P (buf, x)); \
|
|
428
|
396 } while (0)
|
|
826
|
397
|
|
|
398 /* If error-checking is enabled, assert that the given byte position is
|
|
|
399 within range and satisfies ASSERT_VALID_BYTEBPOS() and also does not
|
|
|
400 refer to the beginning of the buffer. (i.e. movement backwards is OK.)
|
|
|
401 Otherwise, do nothing.
|
|
|
402 */
|
|
|
403 # define ASSERT_VALID_BYTEBPOS_BACKWARD_UNSAFE(buf, x) do { \
|
|
|
404 text_checking_assert (BUFFER_LIVE_P (buf)); \
|
|
|
405 text_checking_assert ((x) > BYTE_BUF_BEG (buf) && x <= BYTE_BUF_Z (buf)); \
|
|
|
406 text_checking_assert (VALID_BYTEBPOS_P (buf, x)); \
|
|
428
|
407 } while (0)
|
|
|
408
|
|
826
|
409 /* If error-checking is enabled, assert that the given byte position is
|
|
|
410 within range and satisfies ASSERT_VALID_BYTEBPOS() and also does not
|
|
|
411 refer to the end of the buffer. (i.e. movement forwards is OK.)
|
|
|
412 Otherwise, do nothing.
|
|
|
413 */
|
|
|
414 # define ASSERT_VALID_BYTEBPOS_FORWARD_UNSAFE(buf, x) do { \
|
|
|
415 text_checking_assert (BUFFER_LIVE_P (buf)); \
|
|
|
416 text_checking_assert ((x) >= BYTE_BUF_BEG (buf) && x < BYTE_BUF_Z (buf)); \
|
|
|
417 text_checking_assert (VALID_BYTEBPOS_P (buf, x)); \
|
|
|
418 } while (0)
|
|
428
|
419
|
|
|
420 #ifdef MULE
|
|
826
|
421 /* Make sure that the given byte position is pointing to the beginning of a
|
|
|
422 character. If not, back up until this is the case. Note that there are
|
|
|
423 not too many places where it is legitimate to do this sort of thing.
|
|
|
424 It's an error if you're passed an "invalid" byte position.
|
|
|
425 */
|
|
|
426 # define VALIDATE_BYTEBPOS_BACKWARD(buf, x) do { \
|
|
|
427 switch (BUF_FORMAT (buf)) \
|
|
|
428 { \
|
|
|
429 case FORMAT_DEFAULT: \
|
|
|
430 { \
|
|
867
|
431 Ibyte *VBB_ptr = BYTE_BUF_BYTE_ADDRESS_NO_VERIFY (buf, x); \
|
|
|
432 while (!ibyte_first_byte_p (*VBB_ptr)) \
|
|
826
|
433 VBB_ptr--, (x)--; \
|
|
|
434 } \
|
|
|
435 break; \
|
|
|
436 case FORMAT_16_BIT_FIXED: \
|
|
|
437 if (((x - 1) & 1) != 0) \
|
|
|
438 x--; \
|
|
|
439 break; \
|
|
|
440 case FORMAT_32_BIT_FIXED: \
|
|
|
441 while (((x - 1) & 3) != 0) \
|
|
|
442 x--; \
|
|
|
443 break; \
|
|
|
444 default: \
|
|
|
445 break; \
|
|
|
446 } \
|
|
428
|
447 } while (0)
|
|
|
448 #else
|
|
665
|
449 # define VALIDATE_BYTEBPOS_BACKWARD(buf, x)
|
|
428
|
450 #endif
|
|
|
451
|
|
|
452 #ifdef MULE
|
|
826
|
453 /* Make sure that the given byte position is pointing to the beginning of a
|
|
|
454 character. If not, move forward until this is the case. Note that
|
|
|
455 there are not too many places where it is legitimate to do this sort of
|
|
|
456 thing. It's an error if you're passed an "invalid" byte position.
|
|
|
457 */
|
|
|
458 # define VALIDATE_BYTEBPOS_FORWARD(buf, x) do { \
|
|
|
459 switch (BUF_FORMAT (buf)) \
|
|
|
460 { \
|
|
|
461 case FORMAT_DEFAULT: \
|
|
|
462 { \
|
|
867
|
463 Ibyte *VBF_ptr = BYTE_BUF_BYTE_ADDRESS_NO_VERIFY (buf, x); \
|
|
|
464 while (!ibyte_first_byte_p (*VBF_ptr)) \
|
|
826
|
465 VBF_ptr++, (x)++; \
|
|
|
466 } \
|
|
|
467 break; \
|
|
|
468 case FORMAT_16_BIT_FIXED: \
|
|
|
469 if (((x - 1) & 1) != 0) \
|
|
|
470 x++; \
|
|
|
471 break; \
|
|
|
472 case FORMAT_32_BIT_FIXED: \
|
|
|
473 while (((x - 1) & 3) != 0) \
|
|
|
474 x++; \
|
|
|
475 break; \
|
|
|
476 default: \
|
|
|
477 break; \
|
|
|
478 } \
|
|
428
|
479 } while (0)
|
|
|
480 #else
|
|
665
|
481 # define VALIDATE_BYTEBPOS_FORWARD(buf, x)
|
|
428
|
482 #endif
|
|
|
483
|
|
826
|
484 /*----------------------------------------------------------------------*/
|
|
|
485 /* Working with byte positions */
|
|
|
486 /*----------------------------------------------------------------------*/
|
|
|
487
|
|
|
488
|
|
|
489 /* Given a byte position (assumed to point at the beginning of a
|
|
|
490 character), modify that value so it points to the beginning of the next
|
|
|
491 character.
|
|
|
492
|
|
|
493 Note that in the simplest case (no MULE, no ERROR_CHECK_TEXT),
|
|
|
494 this crap reduces down to simply (x)++. */
|
|
428
|
495
|
|
665
|
496 #define INC_BYTEBPOS(buf, x) do \
|
|
428
|
497 { \
|
|
826
|
498 ASSERT_VALID_BYTEBPOS_FORWARD_UNSAFE (buf, x); \
|
|
428
|
499 /* Note that we do the increment first to \
|
|
|
500 make sure that the pointer in \
|
|
665
|
501 VALIDATE_BYTEBPOS_FORWARD() ends up on \
|
|
428
|
502 the correct side of the gap */ \
|
|
|
503 (x)++; \
|
|
665
|
504 VALIDATE_BYTEBPOS_FORWARD (buf, x); \
|
|
428
|
505 } while (0)
|
|
|
506
|
|
826
|
507 /* Given a byte position (assumed to point at the beginning of a
|
|
|
508 character), modify that value so it points to the beginning of the
|
|
867
|
509 previous character. Unlike for DEC_IBYTEPTR(), we can do all the
|
|
826
|
510 assert()s because there are sentinels at the beginning of the gap and
|
|
|
511 the end of the buffer.
|
|
|
512
|
|
|
513 Note that in the simplest case (no MULE, no ERROR_CHECK_TEXT), this
|
|
|
514 crap reduces down to simply (x)--. */
|
|
428
|
515
|
|
665
|
516 #define DEC_BYTEBPOS(buf, x) do \
|
|
428
|
517 { \
|
|
771
|
518 ASSERT_VALID_BYTEBPOS_BACKWARD_UNSAFE (buf, x); \
|
|
428
|
519 /* Note that we do the decrement first to \
|
|
|
520 make sure that the pointer in \
|
|
665
|
521 VALIDATE_BYTEBPOS_BACKWARD() ends up on \
|
|
428
|
522 the correct side of the gap */ \
|
|
|
523 (x)--; \
|
|
665
|
524 VALIDATE_BYTEBPOS_BACKWARD (buf, x); \
|
|
428
|
525 } while (0)
|
|
|
526
|
|
826
|
527 DECLARE_INLINE_HEADER (
|
|
|
528 Bytebpos
|
|
2333
|
529 prev_bytebpos (struct buffer *USED_IF_MULE_OR_CHECK_TEXT (buf), Bytebpos x)
|
|
826
|
530 )
|
|
428
|
531 {
|
|
665
|
532 DEC_BYTEBPOS (buf, x);
|
|
428
|
533 return x;
|
|
|
534 }
|
|
|
535
|
|
826
|
536 DECLARE_INLINE_HEADER (
|
|
|
537 Bytebpos
|
|
2333
|
538 next_bytebpos (struct buffer *USED_IF_MULE_OR_CHECK_TEXT (buf), Bytebpos x)
|
|
826
|
539 )
|
|
428
|
540 {
|
|
665
|
541 INC_BYTEBPOS (buf, x);
|
|
428
|
542 return x;
|
|
|
543 }
|
|
|
544
|
|
826
|
545 /* A constant representing an invalid Bytebpos. Valid Bytebposes
|
|
|
546 can never have this value. */
|
|
|
547
|
|
665
|
548 #define BYTEBPOS_INVALID ((Bytebpos) -1)
|
|
428
|
549
|
|
|
550 /*----------------------------------------------------------------------*/
|
|
826
|
551 /* Converting between byte and character positions */
|
|
428
|
552 /*----------------------------------------------------------------------*/
|
|
|
553
|
|
2367
|
554 /*
|
|
771
|
555
|
|
2367
|
556 Info on Byte-Char conversion:
|
|
428
|
557
|
|
2367
|
558 (Info-goto-node "(internals)Byte-Char Position Conversion")
|
|
|
559 */
|
|
428
|
560
|
|
2367
|
561 #ifdef MULE
|
|
428
|
562
|
|
826
|
563 Bytebpos charbpos_to_bytebpos_func (struct buffer *buf, Charbpos x);
|
|
|
564 Charbpos bytebpos_to_charbpos_func (struct buffer *buf, Bytebpos x);
|
|
428
|
565 extern short three_to_one_table[];
|
|
|
566
|
|
826
|
567 #endif /* MULE */
|
|
|
568
|
|
|
569 /* Given a Charbpos, return the equivalent Bytebpos. */
|
|
|
570
|
|
|
571 DECLARE_INLINE_HEADER (
|
|
|
572 Bytebpos
|
|
2333
|
573 charbpos_to_bytebpos (struct buffer *USED_IF_MULE_OR_CHECK_TEXT (buf),
|
|
|
574 Charbpos x)
|
|
826
|
575 )
|
|
428
|
576 {
|
|
826
|
577 Bytebpos retval;
|
|
|
578 ASSERT_VALID_CHARBPOS_UNSAFE (buf, x);
|
|
|
579 #ifdef MULE
|
|
|
580 if (buf->text->entirely_one_byte_p)
|
|
|
581 retval = (Bytebpos) x;
|
|
|
582 else if (BUF_FORMAT (buf) == FORMAT_16_BIT_FIXED)
|
|
|
583 retval = (Bytebpos) (x << 1);
|
|
|
584 else if (BUF_FORMAT (buf) == FORMAT_32_BIT_FIXED)
|
|
|
585 retval = (Bytebpos) (x << 2);
|
|
2367
|
586 #ifdef OLD_BYTE_CHAR
|
|
826
|
587 else if (x >= buf->text->mule_bufmin && x <= buf->text->mule_bufmax)
|
|
|
588 retval = (buf->text->mule_bytmin +
|
|
428
|
589 ((x - buf->text->mule_bufmin) << buf->text->mule_shifter) +
|
|
814
|
590 (buf->text->mule_three_p ? (x - buf->text->mule_bufmin) :
|
|
|
591 (Bytebpos) 0));
|
|
2367
|
592 #endif /* OLD_BYTE_CHAR */
|
|
428
|
593 else
|
|
826
|
594 retval = charbpos_to_bytebpos_func (buf, x);
|
|
|
595 #else
|
|
|
596 retval = (Bytebpos) x;
|
|
|
597 #endif
|
|
|
598 ASSERT_VALID_BYTEBPOS_UNSAFE (buf, retval);
|
|
|
599 return retval;
|
|
|
600 }
|
|
|
601
|
|
|
602 /* Given a Bytebpos, return the equivalent Charbpos. */
|
|
|
603
|
|
|
604 DECLARE_INLINE_HEADER (
|
|
|
605 Charbpos
|
|
2333
|
606 bytebpos_to_charbpos (struct buffer *USED_IF_MULE_OR_CHECK_TEXT (buf),
|
|
|
607 Bytebpos x)
|
|
826
|
608 )
|
|
|
609 {
|
|
|
610 Charbpos retval;
|
|
|
611 ASSERT_VALID_BYTEBPOS_UNSAFE (buf, x);
|
|
|
612 #ifdef MULE
|
|
|
613 if (buf->text->entirely_one_byte_p)
|
|
|
614 retval = (Charbpos) x;
|
|
|
615 else if (BUF_FORMAT (buf) == FORMAT_16_BIT_FIXED)
|
|
|
616 retval = (Charbpos) (x >> 1);
|
|
|
617 else if (BUF_FORMAT (buf) == FORMAT_32_BIT_FIXED)
|
|
|
618 retval = (Charbpos) (x >> 2);
|
|
2367
|
619 #ifdef OLD_BYTE_CHAR
|
|
826
|
620 else if (x >= buf->text->mule_bytmin && x <= buf->text->mule_bytmax)
|
|
|
621 retval = (buf->text->mule_bufmin +
|
|
|
622 ((buf->text->mule_three_p
|
|
|
623 ? three_to_one_table[x - buf->text->mule_bytmin]
|
|
|
624 : (x - buf->text->mule_bytmin) >> buf->text->mule_shifter)));
|
|
2367
|
625 #endif /* OLD_BYTE_CHAR */
|
|
826
|
626 else
|
|
|
627 retval = bytebpos_to_charbpos_func (buf, x);
|
|
|
628 #else
|
|
|
629 retval = (Charbpos) x;
|
|
|
630 #endif
|
|
|
631 ASSERT_VALID_CHARBPOS_UNSAFE (buf, retval);
|
|
|
632 return retval;
|
|
|
633 }
|
|
|
634
|
|
|
635 /* Given a Bytebpos, return the equivalent Charbpos as a Lisp Object. */
|
|
|
636
|
|
|
637 #define make_charbpos(buf, ind) make_int (bytebpos_to_charbpos (buf, ind))
|
|
|
638
|
|
|
639 /*----------------------------------------------------------------------*/
|
|
|
640 /* Converting between byte and memory positions */
|
|
|
641 /*----------------------------------------------------------------------*/
|
|
|
642
|
|
|
643 DECLARE_INLINE_HEADER (
|
|
|
644 int
|
|
|
645 valid_membpos_p (struct buffer *buf, Membpos x)
|
|
|
646 )
|
|
|
647 {
|
|
|
648 return ((x >= 1 && x <= (Membpos) buf->text->gpt) ||
|
|
|
649 (x > (Membpos) (buf->text->gpt + buf->text->gap_size) &&
|
|
|
650 x <= (Membpos) (buf->text->z + buf->text->gap_size)));
|
|
428
|
651 }
|
|
|
652
|
|
826
|
653 DECLARE_INLINE_HEADER (
|
|
|
654 Membpos
|
|
|
655 bytebpos_to_membpos (struct buffer *buf, Bytebpos x)
|
|
|
656 )
|
|
|
657 {
|
|
|
658 ASSERT_VALID_BYTEBPOS_UNSAFE (buf, x);
|
|
|
659 return (Membpos) ((x > buf->text->gpt) ? (x + buf->text->gap_size) : x);
|
|
|
660 }
|
|
|
661
|
|
|
662
|
|
|
663 DECLARE_INLINE_HEADER (
|
|
|
664 Bytebpos
|
|
|
665 membpos_to_bytebpos (struct buffer *buf, Membpos x)
|
|
|
666 )
|
|
|
667 {
|
|
|
668 Bytebpos retval;
|
|
|
669 text_checking_assert (valid_membpos_p (buf, x));
|
|
|
670 retval = (Bytebpos) ((x > (Membpos) buf->text->gpt) ?
|
|
|
671 x - buf->text->gap_size :
|
|
|
672 x);
|
|
|
673 ASSERT_VALID_BYTEBPOS_UNSAFE (buf, retval);
|
|
|
674 return retval;
|
|
|
675 }
|
|
|
676
|
|
|
677 DECLARE_INLINE_HEADER (
|
|
|
678 Charbpos
|
|
|
679 membpos_to_charbpos (struct buffer *buf, Membpos x)
|
|
|
680 )
|
|
428
|
681 {
|
|
826
|
682 return bytebpos_to_charbpos (buf, membpos_to_bytebpos (buf, x));
|
|
|
683 }
|
|
|
684
|
|
|
685 DECLARE_INLINE_HEADER (
|
|
|
686 Membpos
|
|
|
687 charbpos_to_membpos (struct buffer *buf, Charbpos x)
|
|
|
688 )
|
|
|
689 {
|
|
|
690 return bytebpos_to_membpos (buf, charbpos_to_bytebpos (buf, x));
|
|
|
691 }
|
|
|
692
|
|
|
693 /*----------------------------------------------------------------------*/
|
|
|
694 /* Generalized buffer/string position convertors */
|
|
|
695 /*----------------------------------------------------------------------*/
|
|
|
696
|
|
|
697 /* These macros generalize many standard buffer-position functions to
|
|
|
698 either a buffer or a string. */
|
|
|
699
|
|
|
700 /* Converting between Memxpos's and Bytexpos's, for a buffer-or-string.
|
|
|
701 For strings, this is a no-op. For buffers, this resolves
|
|
|
702 to the standard membpos<->bytebpos converters. */
|
|
|
703
|
|
|
704 DECLARE_INLINE_HEADER (
|
|
|
705 Memxpos buffer_or_string_bytexpos_to_memxpos (Lisp_Object obj, Bytexpos pos)
|
|
|
706 )
|
|
|
707 {
|
|
|
708 return (BUFFERP (obj) ? bytebpos_to_membpos (XBUFFER (obj), pos) :
|
|
|
709 (Memxpos) pos);
|
|
428
|
710 }
|
|
|
711
|
|
826
|
712 DECLARE_INLINE_HEADER (
|
|
|
713 Bytexpos buffer_or_string_memxpos_to_bytexpos (Lisp_Object obj, Memxpos pos)
|
|
|
714 )
|
|
|
715 {
|
|
|
716 return (BUFFERP (obj) ? membpos_to_bytebpos (XBUFFER (obj), pos) :
|
|
|
717 (Bytexpos) pos);
|
|
|
718 }
|
|
|
719
|
|
|
720 /* Converting between Charxpos's and Bytexpos's, for a buffer-or-string.
|
|
|
721 For strings, this maps to the bytecount<->charcount converters. */
|
|
|
722
|
|
|
723 DECLARE_INLINE_HEADER (
|
|
|
724 Bytexpos buffer_or_string_charxpos_to_bytexpos (Lisp_Object obj, Charxpos pos)
|
|
|
725 )
|
|
|
726 {
|
|
|
727 return (BUFFERP (obj) ? charbpos_to_bytebpos (XBUFFER (obj), pos) :
|
|
|
728 (Bytexpos) string_index_char_to_byte (obj, pos));
|
|
|
729 }
|
|
|
730
|
|
|
731 DECLARE_INLINE_HEADER (
|
|
|
732 Charxpos buffer_or_string_bytexpos_to_charxpos (Lisp_Object obj, Bytexpos pos)
|
|
|
733 )
|
|
|
734 {
|
|
|
735 return (BUFFERP (obj) ? bytebpos_to_charbpos (XBUFFER (obj), pos) :
|
|
|
736 (Charxpos) string_index_byte_to_char (obj, pos));
|
|
|
737 }
|
|
428
|
738
|
|
826
|
739 /* Similar for Charxpos's and Memxpos's. */
|
|
|
740
|
|
|
741 DECLARE_INLINE_HEADER (
|
|
|
742 Memxpos buffer_or_string_charxpos_to_memxpos (Lisp_Object obj, Charxpos pos)
|
|
|
743 )
|
|
|
744 {
|
|
|
745 return (BUFFERP (obj) ? charbpos_to_membpos (XBUFFER (obj), pos) :
|
|
|
746 (Memxpos) string_index_char_to_byte (obj, pos));
|
|
|
747 }
|
|
428
|
748
|
|
826
|
749 DECLARE_INLINE_HEADER (
|
|
|
750 Charxpos buffer_or_string_memxpos_to_charxpos (Lisp_Object obj, Memxpos pos)
|
|
|
751 )
|
|
|
752 {
|
|
|
753 return (BUFFERP (obj) ? membpos_to_charbpos (XBUFFER (obj), pos) :
|
|
|
754 (Charxpos) string_index_byte_to_char (obj, pos));
|
|
|
755 }
|
|
428
|
756
|
|
826
|
757 DECLARE_INLINE_HEADER (
|
|
|
758 Internal_Format buffer_or_other_internal_format (Lisp_Object obj)
|
|
|
759 )
|
|
|
760 {
|
|
|
761 return BUFFERP (obj) ? BUF_FORMAT (XBUFFER (obj)) : FORMAT_DEFAULT;
|
|
|
762 }
|
|
|
763
|
|
|
764 /* Return the index to the character before the one at X,
|
|
|
765 in a buffer or string. */
|
|
428
|
766
|
|
826
|
767 DECLARE_INLINE_HEADER (
|
|
|
768 Bytebpos
|
|
|
769 prev_bytexpos (Lisp_Object obj, Bytebpos x)
|
|
|
770 )
|
|
|
771 {
|
|
|
772 return BUFFERP (obj) ? prev_bytebpos (XBUFFER (obj), x) :
|
|
|
773 prev_string_index (obj, x);
|
|
|
774 }
|
|
|
775
|
|
|
776 /* Return the index to the character after the one at X,
|
|
|
777 in a buffer or string. */
|
|
428
|
778
|
|
826
|
779 DECLARE_INLINE_HEADER (
|
|
|
780 Bytebpos
|
|
|
781 next_bytexpos (Lisp_Object obj, Bytebpos x)
|
|
|
782 )
|
|
|
783 {
|
|
|
784 return BUFFERP (obj) ? next_bytebpos (XBUFFER (obj), x) :
|
|
|
785 next_string_index (obj, x);
|
|
|
786 }
|
|
|
787
|
|
|
788 /*----------------------------------------------------------------------*/
|
|
|
789 /* Converting between positions and addresses */
|
|
|
790 /*----------------------------------------------------------------------*/
|
|
428
|
791
|
|
826
|
792 /* Convert the address of a byte in the buffer into a position. */
|
|
|
793 DECLARE_INLINE_HEADER (
|
|
|
794 Bytebpos
|
|
867
|
795 BYTE_BUF_PTR_BYTE_POS (struct buffer *buf, Ibyte *ptr)
|
|
826
|
796 )
|
|
|
797 {
|
|
|
798 Bytebpos retval = (ptr - buf->text->beg + 1
|
|
|
799 - ((ptr - buf->text->beg + 1) > buf->text->gpt
|
|
|
800 ? buf->text->gap_size : (Bytebpos) 0));
|
|
|
801 ASSERT_VALID_BYTEBPOS_UNSAFE (buf, retval);
|
|
|
802 return retval;
|
|
|
803 }
|
|
|
804
|
|
|
805 #define BUF_PTR_BYTE_POS(buf, ptr) \
|
|
|
806 bytebpos_to_charbpos (buf, BYTE_BUF_PTR_BYTE_POS (buf, ptr))
|
|
428
|
807
|
|
826
|
808 /* Address of byte at position POS in buffer. */
|
|
|
809 DECLARE_INLINE_HEADER (
|
|
867
|
810 Ibyte *
|
|
826
|
811 BYTE_BUF_BYTE_ADDRESS (struct buffer *buf, Bytebpos pos)
|
|
|
812 )
|
|
|
813 {
|
|
|
814 ASSERT_VALID_BYTEBPOS_UNSAFE (buf, pos);
|
|
|
815 return BYTE_BUF_BYTE_ADDRESS_NO_VERIFY (buf, pos);
|
|
|
816 }
|
|
|
817
|
|
|
818 #define BUF_BYTE_ADDRESS(buf, pos) \
|
|
|
819 BYTE_BUF_BYTE_ADDRESS (buf, charbpos_to_bytebpos (buf, pos))
|
|
428
|
820
|
|
826
|
821 /* Address of byte before position POS in buffer. */
|
|
|
822 DECLARE_INLINE_HEADER (
|
|
867
|
823 Ibyte *
|
|
826
|
824 BYTE_BUF_BYTE_ADDRESS_BEFORE (struct buffer *buf, Bytebpos pos)
|
|
|
825 )
|
|
|
826 {
|
|
|
827 ASSERT_VALID_BYTEBPOS_UNSAFE (buf, pos);
|
|
|
828 return (buf->text->beg +
|
|
|
829 ((pos > buf->text->gpt ? (pos + buf->text->gap_size) : pos)
|
|
|
830 - 2));
|
|
|
831 }
|
|
|
832
|
|
|
833 #define BUF_BYTE_ADDRESS_BEFORE(buf, pos) \
|
|
|
834 BYTE_BUF_BYTE_ADDRESS_BEFORE (buf, charbpos_to_bytebpos (buf, pos))
|
|
428
|
835
|
|
|
836 /*----------------------------------------------------------------------*/
|
|
|
837 /* Converting between buffer bytes and Emacs characters */
|
|
|
838 /*----------------------------------------------------------------------*/
|
|
|
839
|
|
|
840 /* The character at position POS in buffer. */
|
|
826
|
841
|
|
|
842 #define BYTE_BUF_FETCH_CHAR(buf, pos) \
|
|
867
|
843 itext_ichar_fmt (BYTE_BUF_BYTE_ADDRESS (buf, pos), BUF_FORMAT (buf), \
|
|
826
|
844 wrap_buffer (buf))
|
|
428
|
845 #define BUF_FETCH_CHAR(buf, pos) \
|
|
826
|
846 BYTE_BUF_FETCH_CHAR (buf, charbpos_to_bytebpos (buf, pos))
|
|
|
847
|
|
|
848 /* The "raw value" of the character at position POS in buffer.
|
|
867
|
849 See ichar_to_raw(). */
|
|
826
|
850
|
|
|
851 #define BYTE_BUF_FETCH_CHAR_RAW(buf, pos) \
|
|
867
|
852 itext_ichar_raw_fmt (BYTE_BUF_BYTE_ADDRESS (buf, pos), BUF_FORMAT (buf))
|
|
826
|
853 #define BUF_FETCH_CHAR_RAW(buf, pos) \
|
|
|
854 BYTE_BUF_FETCH_CHAR_RAW (buf, charbpos_to_bytebpos (buf, pos))
|
|
428
|
855
|
|
|
856 /* The character at position POS in buffer, as a string. This is
|
|
867
|
857 equivalent to set_itext_ichar (str, BUF_FETCH_CHAR (buf, pos))
|
|
428
|
858 but is faster for Mule. */
|
|
|
859
|
|
867
|
860 # define BYTE_BUF_ITEXT_COPY_ICHAR(buf, pos, str) \
|
|
826
|
861 (BUF_FORMAT (buf) == FORMAT_DEFAULT ? \
|
|
867
|
862 itext_copy_ichar (BYTE_BUF_BYTE_ADDRESS (buf, pos), str) : \
|
|
|
863 set_itext_ichar (str, BYTE_BUF_FETCH_CHAR (buf, pos)))
|
|
|
864 #define BUF_ITEXT_COPY_ICHAR(buf, pos, str) \
|
|
|
865 BYTE_BUF_ITEXT_COPY_ICHAR (buf, charbpos_to_bytebpos (buf, pos), str)
|
|
428
|
866
|
|
|
867
|
|
|
868 /************************************************************************/
|
|
440
|
869 /* */
|
|
428
|
870 /* higher-level buffer-position functions */
|
|
|
871 /* */
|
|
|
872 /************************************************************************/
|
|
|
873
|
|
|
874 /*----------------------------------------------------------------------*/
|
|
|
875 /* Settor macros for important positions in a buffer */
|
|
|
876 /*----------------------------------------------------------------------*/
|
|
|
877
|
|
|
878 /* Set beginning of accessible range of buffer. */
|
|
826
|
879 #define SET_BOTH_BUF_BEGV(buf, val, bpval) \
|
|
428
|
880 do \
|
|
|
881 { \
|
|
826
|
882 (buf)->begv = (bpval); \
|
|
428
|
883 (buf)->bufbegv = (val); \
|
|
|
884 } while (0)
|
|
|
885
|
|
|
886 /* Set end of accessible range of buffer. */
|
|
826
|
887 #define SET_BOTH_BUF_ZV(buf, val, bpval) \
|
|
428
|
888 do \
|
|
|
889 { \
|
|
826
|
890 (buf)->zv = (bpval); \
|
|
428
|
891 (buf)->bufzv = (val); \
|
|
|
892 } while (0)
|
|
|
893
|
|
|
894 /* Set point. */
|
|
|
895 /* Since BEGV and ZV are almost never set, it's reasonable to enforce
|
|
665
|
896 the restriction that the Charbpos and Bytebpos values must both be
|
|
428
|
897 specified. However, point is set in lots and lots of places. So
|
|
|
898 we provide the ability to specify both (for efficiency) or just
|
|
|
899 one. */
|
|
826
|
900 #define BOTH_BUF_SET_PT(buf, val, bpval) set_buffer_point (buf, val, bpval)
|
|
|
901 #define BYTE_BUF_SET_PT(buf, bpval) \
|
|
|
902 do \
|
|
|
903 { \
|
|
|
904 Bytebpos __bpbsp_bpval = (bpval); \
|
|
|
905 BOTH_BUF_SET_PT (buf, bytebpos_to_charbpos (buf, __bpbsp_bpval), \
|
|
|
906 __bpbsp_bpval); \
|
|
|
907 } while (0)
|
|
|
908 #define BUF_SET_PT(buf, value) \
|
|
|
909 do \
|
|
|
910 { \
|
|
|
911 Bytebpos __bsp_val = (value); \
|
|
|
912 BOTH_BUF_SET_PT (buf, __bsp_val, charbpos_to_bytebpos (buf, __bsp_val)); \
|
|
|
913 } while (0)
|
|
428
|
914
|
|
|
915
|
|
|
916 #if 0 /* FSFmacs */
|
|
|
917 /* These macros exist in FSFmacs because SET_PT() in FSFmacs incorrectly
|
|
|
918 does too much stuff, such as moving out of invisible extents. */
|
|
|
919 #define TEMP_SET_PT(position) (temp_set_point ((position), current_buffer))
|
|
|
920 #define SET_BUF_PT(buf, value) ((buf)->pt = (value))
|
|
|
921 #endif /* FSFmacs */
|
|
|
922
|
|
|
923 /*----------------------------------------------------------------------*/
|
|
|
924 /* Miscellaneous buffer values */
|
|
|
925 /*----------------------------------------------------------------------*/
|
|
|
926
|
|
|
927 /* Number of characters in buffer */
|
|
|
928 #define BUF_SIZE(buf) (BUF_Z (buf) - BUF_BEG (buf))
|
|
|
929
|
|
|
930 /* Is this buffer narrowed? */
|
|
|
931 #define BUF_NARROWED(buf) \
|
|
826
|
932 ((BYTE_BUF_BEGV (buf) != BYTE_BUF_BEG (buf)) || \
|
|
|
933 (BYTE_BUF_ZV (buf) != BYTE_BUF_Z (buf)))
|
|
428
|
934
|
|
826
|
935 /* Modification count */
|
|
428
|
936 #define BUF_MODIFF(buf) ((buf)->text->modiff)
|
|
|
937
|
|
826
|
938 /* Saved modification count */
|
|
428
|
939 #define BUF_SAVE_MODIFF(buf) ((buf)->text->save_modiff)
|
|
|
940
|
|
|
941 /* Face changed. */
|
|
|
942 #define BUF_FACECHANGE(buf) ((buf)->face_change)
|
|
|
943
|
|
826
|
944 DECLARE_INLINE_HEADER (
|
|
|
945 int
|
|
|
946 POINT_MARKER_P (Lisp_Object marker)
|
|
|
947 )
|
|
|
948 {
|
|
|
949 return (XMARKER (marker)->buffer != 0 &&
|
|
|
950 EQ (marker, XMARKER (marker)->buffer->point_marker));
|
|
|
951 }
|
|
428
|
952
|
|
|
953 #define BUF_MARKERS(buf) ((buf)->markers)
|
|
|
954
|
|
826
|
955 #ifdef MULE
|
|
|
956
|
|
|
957 DECLARE_INLINE_HEADER (
|
|
|
958 Lisp_Object
|
|
|
959 BUFFER_CATEGORY_TABLE (struct buffer *buf)
|
|
|
960 )
|
|
|
961 {
|
|
|
962 return buf ? buf->category_table : Vstandard_category_table;
|
|
|
963 }
|
|
|
964
|
|
|
965 #endif /* MULE */
|
|
|
966
|
|
|
967 DECLARE_INLINE_HEADER (
|
|
|
968 Lisp_Object
|
|
|
969 BUFFER_SYNTAX_TABLE (struct buffer *buf)
|
|
|
970 )
|
|
|
971 {
|
|
|
972 return buf ? buf->syntax_table : Vstandard_syntax_table;
|
|
|
973 }
|
|
|
974
|
|
|
975 DECLARE_INLINE_HEADER (
|
|
|
976 Lisp_Object
|
|
|
977 BUFFER_MIRROR_SYNTAX_TABLE (struct buffer *buf)
|
|
|
978 )
|
|
|
979 {
|
|
|
980 return buf ? buf->mirror_syntax_table :
|
|
|
981 XCHAR_TABLE (Vstandard_syntax_table)->mirror_table;
|
|
|
982 }
|
|
|
983
|
|
428
|
984 /* WARNING:
|
|
|
985
|
|
|
986 The new definitions of CEILING_OF() and FLOOR_OF() differ semantically
|
|
|
987 from the old ones (in FSF Emacs and XEmacs 19.11 and before).
|
|
|
988 Conversion is as follows:
|
|
|
989
|
|
826
|
990 OLD_BYTE_CEILING_OF(n) = NEW_BYTE_CEILING_OF(n) - 1
|
|
|
991 OLD_BYTE_FLOOR_OF(n) = NEW_BYTE_FLOOR_OF(n + 1)
|
|
428
|
992
|
|
|
993 The definitions were changed because the new definitions are more
|
|
771
|
994 consistent with the way everything else works in XEmacs.
|
|
428
|
995 */
|
|
|
996
|
|
826
|
997 /* Properties of CEILING_OF and FLOOR_OF (also apply to BYTE_ variants):
|
|
428
|
998
|
|
|
999 1) FLOOR_OF (CEILING_OF (n)) = n
|
|
|
1000 CEILING_OF (FLOOR_OF (n)) = n
|
|
|
1001
|
|
|
1002 2) CEILING_OF (n) = n if and only if n = ZV
|
|
|
1003 FLOOR_OF (n) = n if and only if n = BEGV
|
|
|
1004
|
|
|
1005 3) CEILING_OF (CEILING_OF (n)) = ZV
|
|
|
1006 FLOOR_OF (FLOOR_OF (n)) = BEGV
|
|
|
1007
|
|
|
1008 4) The bytes in the regions
|
|
|
1009
|
|
|
1010 [BYTE_ADDRESS (n), BYTE_ADDRESS_BEFORE (CEILING_OF (n))]
|
|
|
1011
|
|
|
1012 and
|
|
|
1013
|
|
|
1014 [BYTE_ADDRESS (FLOOR_OF (n)), BYTE_ADDRESS_BEFORE (n)]
|
|
|
1015
|
|
|
1016 are contiguous.
|
|
771
|
1017
|
|
|
1018 A typical loop using CEILING_OF to process contiguous ranges of text
|
|
|
1019 between [from, to) looks like this:
|
|
|
1020
|
|
|
1021 {
|
|
|
1022 Bytebpos pos = from;
|
|
|
1023
|
|
|
1024 while (pos < to)
|
|
|
1025 {
|
|
826
|
1026 Bytebpos ceil = BYTE_BUF_CEILING_OF (buf, pos);
|
|
771
|
1027 ceil = min (to, ceil);
|
|
867
|
1028 process_ibyte_string (BYTE_BUF_BYTE_ADDRESS (buf, pos), ceil - pos);
|
|
771
|
1029 pos = ceil;
|
|
|
1030 }
|
|
|
1031 }
|
|
|
1032
|
|
|
1033 Currently there will be at most two iterations in the loop, but it is
|
|
|
1034 written in such a way that it will still work if the buffer
|
|
|
1035 representation is changed to have multiple gaps in it.
|
|
|
1036 */
|
|
428
|
1037
|
|
826
|
1038 /* Return the maximum position in the buffer it is safe to scan forwards
|
|
428
|
1039 past N to. This is used to prevent buffer scans from running into
|
|
|
1040 the gap (e.g. search.c). All characters between N and CEILING_OF(N)
|
|
|
1041 are located contiguous in memory. Note that the character *at*
|
|
|
1042 CEILING_OF(N) is not contiguous in memory. */
|
|
826
|
1043 #define BYTE_BUF_CEILING_OF(b, n) \
|
|
2367
|
1044 ((n) < BYTE_BUF_GPT (b) && BYTE_BUF_GPT (b) < BYTE_BUF_ZV (b) ? \
|
|
|
1045 BYTE_BUF_GPT (b) : BYTE_BUF_ZV (b))
|
|
|
1046 #define BUF_CEILING_OF(b, n) \
|
|
|
1047 ((n) < BUF_GPT (b) && BUF_GPT (b) < BUF_ZV (b) ? \
|
|
|
1048 BUF_GPT (b) : BUF_ZV (b))
|
|
428
|
1049
|
|
826
|
1050 /* Return the minimum position in the buffer it is safe to scan backwards
|
|
428
|
1051 past N to. All characters between FLOOR_OF(N) and N are located
|
|
|
1052 contiguous in memory. Note that the character *at* N may not be
|
|
|
1053 contiguous in memory. */
|
|
2367
|
1054 #define BYTE_BUF_FLOOR_OF(b, n) \
|
|
|
1055 (BYTE_BUF_BEGV (b) < BYTE_BUF_GPT (b) && BYTE_BUF_GPT (b) < (n) ? \
|
|
|
1056 BYTE_BUF_GPT (b) : BYTE_BUF_BEGV (b))
|
|
|
1057 #define BUF_FLOOR_OF(b, n) \
|
|
|
1058 (BUF_BEGV (b) < BUF_GPT (b) && BUF_GPT (b) < (n) ? \
|
|
|
1059 BUF_GPT (b) : BUF_BEGV (b))
|
|
428
|
1060
|
|
826
|
1061 #define BYTE_BUF_CEILING_OF_IGNORE_ACCESSIBLE(b, n) \
|
|
2367
|
1062 ((n) < BYTE_BUF_GPT (b) && BYTE_BUF_GPT (b) < BYTE_BUF_Z (b) ? \
|
|
|
1063 BYTE_BUF_GPT (b) : BYTE_BUF_Z (b))
|
|
|
1064 #define BUF_CEILING_OF_IGNORE_ACCESSIBLE(b, n) \
|
|
|
1065 ((n) < BUF_GPT (b) && BUF_GPT (b) < BUF_Z (b) ? \
|
|
|
1066 BUF_GPT (b) : BUF_Z (b))
|
|
428
|
1067
|
|
2367
|
1068 #define BYTE_BUF_FLOOR_OF_IGNORE_ACCESSIBLE(b, n) \
|
|
|
1069 (BYTE_BUF_BEG (b) < BYTE_BUF_GPT (b) && BYTE_BUF_GPT (b) < (n) ? \
|
|
|
1070 BYTE_BUF_GPT (b) : BYTE_BUF_BEG (b))
|
|
|
1071 #define BUF_FLOOR_OF_IGNORE_ACCESSIBLE(b, n) \
|
|
|
1072 (BUF_BEG (b) < BUF_GPT (b) && BUF_GPT (b) < (n) ? \
|
|
|
1073 BUF_GPT (b) : BUF_BEG (b))
|
|
826
|
1074
|
|
|
1075 /* Iterate over contiguous chunks of text in buffer BUF, starting at POS,
|
|
|
1076 of length LEN. Evaluates POS and LEN only once, but BUF multiply. In
|
|
|
1077 each iteration, store the current chunk into RUNPTR/RUNLEN, which will
|
|
|
1078 be automatically declared (don't declare them yourself). This does not
|
|
|
1079 respect the limits of accessibility (BUF_BEGV/BUF_ZV); if you want these
|
|
|
1080 limits respected, you need to impose them yourself.
|
|
|
1081
|
|
|
1082 NOTE: This must be surrounded with braces! */
|
|
|
1083
|
|
|
1084 #define BUFFER_TEXT_LOOP(buf, pos, len, runptr, runlen) \
|
|
2367
|
1085 Ibyte *runptr; \
|
|
826
|
1086 Bytecount runlen; \
|
|
|
1087 Bytebpos BTL_pos = (pos); \
|
|
|
1088 Bytebpos BTL_len = (len); \
|
|
|
1089 for (runptr = BYTE_BUF_BYTE_ADDRESS (buf, BTL_pos), \
|
|
|
1090 runlen = BYTE_BUF_CEILING_OF_IGNORE_ACCESSIBLE (buf, BTL_pos) - BTL_pos, \
|
|
|
1091 runlen = min (BTL_len, runlen); \
|
|
|
1092 BTL_len > 0; \
|
|
|
1093 BTL_pos += runlen, \
|
|
|
1094 BTL_len -= runlen, \
|
|
|
1095 runptr = BYTE_BUF_BYTE_ADDRESS (buf, BTL_pos), \
|
|
|
1096 runlen = BYTE_BUF_CEILING_OF_IGNORE_ACCESSIBLE (buf, BTL_pos) - BTL_pos, \
|
|
|
1097 runlen = min (BTL_len, runlen))
|
|
428
|
1098
|
|
|
1099 /* This structure marks which slots in a buffer have corresponding
|
|
|
1100 default values in Vbuffer_defaults.
|
|
|
1101 Each such slot has a nonzero value in this structure.
|
|
|
1102 The value has only one nonzero bit.
|
|
|
1103
|
|
|
1104 When a buffer has its own local value for a slot,
|
|
|
1105 the bit for that slot (found in the same slot in this structure)
|
|
|
1106 is turned on in the buffer's local_var_flags slot.
|
|
|
1107
|
|
|
1108 If a slot in this structure is zero, then even though there may
|
|
|
1109 be a DEFVAR_BUFFER_LOCAL for the slot, there is no default value for it;
|
|
|
1110 and the corresponding slot in Vbuffer_defaults is not used. */
|
|
|
1111
|
|
|
1112 extern struct buffer buffer_local_flags;
|
|
|
1113
|
|
|
1114
|
|
|
1115 /* Allocation of buffer data. */
|
|
|
1116
|
|
|
1117 #ifdef REL_ALLOC
|
|
|
1118
|
|
440
|
1119 char *r_alloc (unsigned char **, size_t);
|
|
|
1120 char *r_re_alloc (unsigned char **, size_t);
|
|
428
|
1121 void r_alloc_free (unsigned char **);
|
|
|
1122
|
|
|
1123 #define BUFFER_ALLOC(data, size) \
|
|
867
|
1124 ((Ibyte *) r_alloc ((unsigned char **) &data, (size) * sizeof(Ibyte)))
|
|
428
|
1125 #define BUFFER_REALLOC(data, size) \
|
|
867
|
1126 ((Ibyte *) r_re_alloc ((unsigned char **) &data, (size) * sizeof(Ibyte)))
|
|
428
|
1127 #define BUFFER_FREE(data) r_alloc_free ((unsigned char **) &(data))
|
|
|
1128 #define R_ALLOC_DECLARE(var,data) r_alloc_declare (&(var), data)
|
|
|
1129
|
|
|
1130 #else /* !REL_ALLOC */
|
|
|
1131
|
|
|
1132 #define BUFFER_ALLOC(data,size)\
|
|
867
|
1133 (data = xnew_array (Ibyte, size))
|
|
428
|
1134 #define BUFFER_REALLOC(data,size)\
|
|
867
|
1135 ((Ibyte *) xrealloc (data, (size) * sizeof(Ibyte)))
|
|
428
|
1136 /* Avoid excess parentheses, or syntax errors may rear their heads. */
|
|
1726
|
1137 #define BUFFER_FREE(data) xfree (data, Ibyte *)
|
|
428
|
1138 #define R_ALLOC_DECLARE(var,data)
|
|
|
1139
|
|
|
1140 #endif /* !REL_ALLOC */
|
|
|
1141
|
|
|
1142
|
|
|
1143 /************************************************************************/
|
|
|
1144 /* Case conversion */
|
|
|
1145 /************************************************************************/
|
|
|
1146
|
|
|
1147 /* A "trt" table is a mapping from characters to other characters,
|
|
826
|
1148 typically used to convert between uppercase and lowercase.
|
|
428
|
1149 */
|
|
|
1150
|
|
|
1151 /* The _1 macros are named as such because they assume that you have
|
|
|
1152 already guaranteed that the character values are all in the range
|
|
|
1153 0 - 255. Bad lossage will happen otherwise. */
|
|
|
1154
|
|
446
|
1155 #define MAKE_TRT_TABLE() Fmake_char_table (Qgeneric)
|
|
826
|
1156 DECLARE_INLINE_HEADER (
|
|
867
|
1157 Ichar
|
|
|
1158 TRT_TABLE_OF (Lisp_Object table, Ichar ch)
|
|
826
|
1159 )
|
|
446
|
1160 {
|
|
|
1161 Lisp_Object TRT_char;
|
|
826
|
1162 TRT_char = get_char_table (ch, table);
|
|
446
|
1163 if (NILP (TRT_char))
|
|
|
1164 return ch;
|
|
|
1165 else
|
|
|
1166 return XCHAR (TRT_char);
|
|
|
1167 }
|
|
826
|
1168 #define SET_TRT_TABLE_OF(table, ch1, ch2) \
|
|
|
1169 Fput_char_table (make_char (ch1), make_char (ch2), table)
|
|
428
|
1170
|
|
826
|
1171 DECLARE_INLINE_HEADER (
|
|
|
1172 Lisp_Object
|
|
771
|
1173 BUFFER_CASE_TABLE (struct buffer *buf)
|
|
826
|
1174 )
|
|
771
|
1175 {
|
|
|
1176 return buf ? buf->case_table : Vstandard_case_table;
|
|
|
1177 }
|
|
|
1178
|
|
428
|
1179 /* Macros used below. */
|
|
446
|
1180 #define DOWNCASE_TABLE_OF(buf, c) \
|
|
771
|
1181 TRT_TABLE_OF (XCASE_TABLE_DOWNCASE (BUFFER_CASE_TABLE (buf)), c)
|
|
446
|
1182 #define UPCASE_TABLE_OF(buf, c) \
|
|
771
|
1183 TRT_TABLE_OF (XCASE_TABLE_UPCASE (BUFFER_CASE_TABLE (buf)), c)
|
|
428
|
1184
|
|
|
1185 /* 1 if CH is upper case. */
|
|
|
1186
|
|
826
|
1187 DECLARE_INLINE_HEADER (
|
|
|
1188 int
|
|
867
|
1189 UPPERCASEP (struct buffer *buf, Ichar ch)
|
|
826
|
1190 )
|
|
428
|
1191 {
|
|
|
1192 return DOWNCASE_TABLE_OF (buf, ch) != ch;
|
|
|
1193 }
|
|
|
1194
|
|
|
1195 /* 1 if CH is lower case. */
|
|
|
1196
|
|
826
|
1197 DECLARE_INLINE_HEADER (
|
|
|
1198 int
|
|
867
|
1199 LOWERCASEP (struct buffer *buf, Ichar ch)
|
|
826
|
1200 )
|
|
428
|
1201 {
|
|
|
1202 return (UPCASE_TABLE_OF (buf, ch) != ch &&
|
|
|
1203 DOWNCASE_TABLE_OF (buf, ch) == ch);
|
|
|
1204 }
|
|
|
1205
|
|
|
1206 /* 1 if CH is neither upper nor lower case. */
|
|
|
1207
|
|
826
|
1208 DECLARE_INLINE_HEADER (
|
|
|
1209 int
|
|
867
|
1210 NOCASEP (struct buffer *buf, Ichar ch)
|
|
826
|
1211 )
|
|
428
|
1212 {
|
|
|
1213 return UPCASE_TABLE_OF (buf, ch) == ch;
|
|
|
1214 }
|
|
|
1215
|
|
|
1216 /* Upcase a character, or make no change if that cannot be done. */
|
|
|
1217
|
|
826
|
1218 DECLARE_INLINE_HEADER (
|
|
867
|
1219 Ichar
|
|
|
1220 UPCASE (struct buffer *buf, Ichar ch)
|
|
826
|
1221 )
|
|
428
|
1222 {
|
|
|
1223 return (DOWNCASE_TABLE_OF (buf, ch) == ch) ? UPCASE_TABLE_OF (buf, ch) : ch;
|
|
|
1224 }
|
|
|
1225
|
|
|
1226 /* Upcase a character known to be not upper case. Unused. */
|
|
|
1227
|
|
|
1228 #define UPCASE1(buf, ch) UPCASE_TABLE_OF (buf, ch)
|
|
|
1229
|
|
|
1230 /* Downcase a character, or make no change if that cannot be done. */
|
|
|
1231
|
|
|
1232 #define DOWNCASE(buf, ch) DOWNCASE_TABLE_OF (buf, ch)
|
|
|
1233
|
|
440
|
1234 #endif /* INCLUDED_buffer_h_ */
|
