Mercurial > hg > xemacs-beta
annotate src/buffer.h @ 5925:08cfc8f77fb6 cygwin
make space for long ptr, and store as such, for frame in WINDOW data,
add a bit more debugging to debug-mswindow,
Vin Shelton patch to fix M-x shell
| author | Henry Thompson <ht@markup.co.uk> |
|---|---|
| date | Fri, 27 Feb 2015 17:41:20 +0000 |
| parents | 56144c8593a8 |
| children |
| rev | line source |
|---|---|
| 428 | 1 /* Header file for the buffer manipulation primitives. |
| 2 Copyright (C) 1985, 1986, 1992, 1993, 1994, 1995 | |
| 3 Free Software Foundation, Inc. | |
| 4 Copyright (C) 1995 Sun Microsystems, Inc. | |
| 2367 | 5 Copyright (C) 2001, 2002, 2004 Ben Wing. |
| 428 | 6 |
| 7 This file is part of XEmacs. | |
| 8 | |
|
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9 XEmacs is free software: you can redistribute it and/or modify it |
| 428 | 10 under the terms of the GNU General Public License as published by the |
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11 Free Software Foundation, either version 3 of the License, or (at your |
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12 option) any later version. |
| 428 | 13 |
| 14 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 17 for more details. | |
| 18 | |
| 19 You should have received a copy of the GNU General Public License | |
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20 along with XEmacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 428 | 21 |
| 22 /* Synched up with: FSF 19.30. */ | |
| 23 | |
| 24 /* Authorship: | |
| 25 | |
| 26 FSF: long ago. | |
| 27 JWZ: separated out bufslots.h, early in Lemacs. | |
| 28 Ben Wing: almost completely rewritten for Mule, 19.12. | |
| 29 */ | |
| 30 | |
| 440 | 31 #ifndef INCLUDED_buffer_h_ |
| 32 #define INCLUDED_buffer_h_ | |
| 428 | 33 |
| 446 | 34 #include "casetab.h" |
| 35 #include "chartab.h" | |
| 36 | |
| 428 | 37 /************************************************************************/ |
| 38 /* */ | |
| 39 /* definition of Lisp buffer object */ | |
| 40 /* */ | |
| 41 /************************************************************************/ | |
| 42 | |
| 665 | 43 /* Note: we keep both Bytebpos and Charbpos versions of some of the |
| 428 | 44 important buffer positions because they are accessed so much. |
| 45 If we didn't do this, we would constantly be invalidating the | |
| 665 | 46 charbpos<->bytebpos cache under Mule. |
| 428 | 47 |
| 48 Note that under non-Mule, both versions will always be the | |
| 49 same so we don't really need to keep track of them. But it | |
| 50 simplifies the logic to go ahead and do so all the time and | |
| 51 the memory loss is insignificant. */ | |
| 52 | |
| 53 /* Formerly, it didn't much matter what went inside the struct buffer_text | |
| 54 and what went outside it. Now it does, with the advent of "indirect | |
| 55 buffers" that share text with another buffer. An indirect buffer | |
| 56 shares the same *text* as another buffer, but has its own buffer-local | |
| 57 variables, its own accessible region, and its own markers and extents. | |
| 58 (Due to the nature of markers, it doesn't actually matter much whether | |
| 59 we stick them inside or out of the struct buffer_text -- the user won't | |
| 60 notice any difference -- but we go ahead and put them outside for | |
| 61 consistency and overall saneness of algorithm.) | |
| 62 | |
| 63 FSFmacs gets away with not maintaining any "children" pointers from | |
| 64 a buffer to the indirect buffers that refer to it by putting the | |
| 65 markers inside of the struct buffer_text, using markers to keep track | |
| 66 of BEGV and ZV in indirect buffers, and relying on the fact that | |
| 67 all intervals (text properties and overlays) use markers for their | |
| 68 start and end points. We don't do this for extents (markers are | |
| 69 inefficient anyway and take up space), so we have to maintain | |
| 70 children pointers. This is not terribly hard, though, and the | |
| 71 code to maintain this is just like the code already present in | |
| 72 extent-parent and extent-children. | |
| 73 */ | |
| 74 | |
| 2367 | 75 #define NUM_CACHED_POSITIONS 50 |
| 76 #define NUM_MOVED_POSITIONS 10 | |
| 77 | |
| 428 | 78 struct buffer_text |
| 79 { | |
| 3092 | 80 #ifdef NEW_GC |
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81 NORMAL_LISP_OBJECT_HEADER header; |
| 3092 | 82 #endif /* NEW_GC */ |
| 867 | 83 Ibyte *beg; /* Actual address of buffer contents. */ |
| 665 | 84 Bytebpos gpt; /* Index of gap in buffer. */ |
| 2367 | 85 Charbpos bufgpt; /* Equivalent as a Charbpos. */ |
| 665 | 86 Bytebpos z; /* Index of end of buffer. */ |
| 2367 | 87 Charbpos bufz; /* Equivalent as a Charbpos. */ |
| 665 | 88 Bytecount gap_size;/* Size of buffer's gap */ |
| 89 Bytecount end_gap_size;/* Size of buffer's end gap */ | |
| 428 | 90 long modiff; /* This counts buffer-modification events |
| 91 for this buffer. It is incremented for | |
| 92 each such event, and never otherwise | |
| 93 changed. */ | |
| 94 long save_modiff; /* Previous value of modiff, as of last | |
| 95 time buffer visited or saved a file. */ | |
| 96 | |
| 97 #ifdef MULE | |
| 2367 | 98 |
| 99 #ifdef OLD_BYTE_CHAR | |
| 771 | 100 /* We keep track of a "known" region for very fast access. This |
| 101 information is text-only so it goes here. We update this at each | |
| 102 change to the buffer, so if it's entirely ASCII, these will always | |
| 103 contain the minimum and maximum positions of the buffer. */ | |
| 665 | 104 Charbpos mule_bufmin, mule_bufmax; |
| 105 Bytebpos mule_bytmin, mule_bytmax; | |
| 428 | 106 int mule_shifter, mule_three_p; |
| 2367 | 107 #endif |
| 428 | 108 |
| 2367 | 109 /* And we also cache NUM_CACHED_POSITIONS positions for fairly fast |
| 110 access near those positions. */ | |
| 111 Charbpos mule_charbpos_cache[NUM_CACHED_POSITIONS]; | |
| 112 Bytebpos mule_bytebpos_cache[NUM_CACHED_POSITIONS]; | |
| 113 int next_cache_pos; | |
| 114 | |
| 115 Charbpos cached_charpos; | |
| 116 Bytebpos cached_bytepos; | |
| 771 | 117 |
| 826 | 118 /* True if all chars fit into one byte; |
| 119 == (format == FORMAT_8_BIT_FIXED || | |
| 120 (format == FORMAT_DEFAULT && num_ascii_chars == bufz - 1)) | |
| 121 kept around to speed up (slightly?) the byte-char conversion routines. */ | |
| 122 int entirely_one_byte_p; | |
| 123 /* Number of ASCII chars in buffer (0 - 127) */ | |
| 124 Charcount num_ascii_chars; | |
| 125 /* Number of chars in buffer that would fit in an 8-bit-fixed buffer. */ | |
| 126 Charcount num_8_bit_fixed_chars; | |
| 127 /* Number of chars in buffer that would fit in an 16-bit-fixed buffer. */ | |
| 128 Charcount num_16_bit_fixed_chars; | |
| 129 | |
| 130 /* Currently we only handle 8 bit fixed and default */ | |
| 131 Internal_Format format; | |
| 2367 | 132 #endif /* MULE */ |
| 428 | 133 |
| 134 /* Similar to the above, we keep track of positions for which line | |
| 135 number has last been calculated. See line-number.c. */ | |
| 136 Lisp_Object line_number_cache; | |
| 137 | |
| 138 /* Change data that goes with the text. */ | |
| 139 struct buffer_text_change_data *changes; | |
| 140 }; | |
| 141 | |
| 3092 | 142 #ifdef NEW_GC |
| 143 typedef struct buffer_text Lisp_Buffer_Text; | |
| 144 | |
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145 DECLARE_LISP_OBJECT (buffer_text, Lisp_Buffer_Text); |
| 3092 | 146 |
| 147 #define XBUFFER_TEXT(x) \ | |
| 148 XRECORD (x, buffer_text, Lisp_Buffer_Text) | |
| 149 #define wrap_buffer_text(p) wrap_record (p, buffer_text) | |
| 150 #define BUFFER_TEXT_P(x) RECORDP (x, buffer_text) | |
| 151 #define CHECK_BUFFER_TEXT(x) CHECK_RECORD (x, buffer_text) | |
| 152 #define CONCHECK_BUFFER_TEXT(x) CONCHECK_RECORD (x, buffer_text) | |
| 153 #endif /* NEW_GC */ | |
| 154 | |
| 155 | |
| 428 | 156 struct buffer |
| 157 { | |
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158 NORMAL_LISP_OBJECT_HEADER header; |
| 428 | 159 |
| 160 /* This structure holds the coordinates of the buffer contents | |
| 161 in ordinary buffers. In indirect buffers, this is not used. */ | |
| 162 struct buffer_text own_text; | |
| 163 | |
| 164 /* This points to the `struct buffer_text' that is used for this buffer. | |
| 165 In an ordinary buffer, this is the own_text field above. | |
| 166 In an indirect buffer, this is the own_text field of another buffer. */ | |
| 167 struct buffer_text *text; | |
| 168 | |
| 665 | 169 Bytebpos pt; /* Position of point in buffer. */ |
| 170 Charbpos bufpt; /* Equivalent as a Charbpos. */ | |
| 171 Bytebpos begv; /* Index of beginning of accessible range. */ | |
| 172 Charbpos bufbegv; /* Equivalent as a Charbpos. */ | |
| 173 Bytebpos zv; /* Index of end of accessible range. */ | |
| 174 Charbpos bufzv; /* Equivalent as a Charbpos. */ | |
| 428 | 175 |
| 176 int face_change; /* This is set when a change in how the text should | |
| 177 be displayed (e.g., font, color) is made. */ | |
| 178 | |
| 448 | 179 /* Whether buffer specific face is specified. */ |
| 180 int buffer_local_face_property; | |
| 181 | |
| 428 | 182 /* change data indicating what portion of the text has changed |
| 183 since the last time this was reset. Used by redisplay. | |
| 184 Logically we should keep this with the text structure, but | |
| 185 redisplay resets it for each buffer individually and we don't | |
| 186 want interference between an indirect buffer and its base | |
| 187 buffer. */ | |
| 188 struct each_buffer_change_data *changes; | |
| 189 | |
| 190 #ifdef REGION_CACHE_NEEDS_WORK | |
| 191 /* If the long line scan cache is enabled (i.e. the buffer-local | |
| 192 variable cache-long-line-scans is non-nil), newline_cache | |
| 193 points to the newline cache, and width_run_cache points to the | |
| 194 width run cache. | |
| 195 | |
| 196 The newline cache records which stretches of the buffer are | |
| 197 known *not* to contain newlines, so that they can be skipped | |
| 198 quickly when we search for newlines. | |
| 199 | |
| 200 The width run cache records which stretches of the buffer are | |
| 201 known to contain characters whose widths are all the same. If | |
| 202 the width run cache maps a character to a value > 0, that value | |
| 203 is the character's width; if it maps a character to zero, we | |
| 204 don't know what its width is. This allows compute_motion to | |
| 205 process such regions very quickly, using algebra instead of | |
| 206 inspecting each character. See also width_table, below. */ | |
| 207 struct region_cache *newline_cache; | |
| 208 struct region_cache *width_run_cache; | |
| 209 #endif /* REGION_CACHE_NEEDS_WORK */ | |
| 210 | |
| 211 /* The markers that refer to this buffer. This is actually a single | |
| 212 marker -- successive elements in its marker `chain' are the other | |
| 213 markers referring to this buffer */ | |
| 440 | 214 Lisp_Marker *markers; |
| 428 | 215 |
| 216 /* The buffer's extent info. This is its own type, an extent-info | |
| 217 object (done this way for ease in marking / finalizing). */ | |
| 218 Lisp_Object extent_info; | |
| 219 | |
| 826 | 220 /* The buffer's syntax cache. This caches a known region where the |
| 221 `syntax-table' property is unchanged, for quick lookup in the routines | |
| 222 that scan a buffer looking for a particular syntax (regex routines, | |
| 223 parse-partial-sexp, etc.). */ | |
| 224 struct syntax_cache *syntax_cache; | |
| 225 | |
| 428 | 226 /* ----------------------------------------------------------------- */ |
| 227 /* All the stuff above this line is the responsibility of insdel.c, | |
| 826 | 228 with some help from marker.c, extents.c and syntax.c. |
| 428 | 229 All the stuff below this line is the responsibility of buffer.c. */ |
| 230 | |
| 231 /* In an indirect buffer, this points to the base buffer. | |
| 232 In an ordinary buffer, it is 0. | |
| 233 We DO mark through this slot. */ | |
| 234 struct buffer *base_buffer; | |
| 235 | |
| 236 /* List of indirect buffers whose base is this buffer. | |
| 237 If we are an indirect buffer, this will be nil. | |
| 238 Do NOT mark through this. */ | |
| 239 Lisp_Object indirect_children; | |
| 240 | |
| 241 /* Flags saying which DEFVAR_PER_BUFFER variables | |
| 242 are local to this buffer. */ | |
| 243 int local_var_flags; | |
| 244 | |
| 245 /* Set to the modtime of the visited file when read or written. | |
| 246 -1 means visited file was nonexistent. | |
| 247 0 means visited file modtime unknown; in no case complain | |
| 248 about any mismatch on next save attempt. */ | |
| 249 int modtime; | |
| 250 | |
| 251 /* the value of text->modiff at the last auto-save. */ | |
| 442 | 252 long auto_save_modified; |
| 428 | 253 |
| 254 /* The time at which we detected a failure to auto-save, | |
| 255 Or -1 if we didn't have a failure. */ | |
| 256 int auto_save_failure_time; | |
| 257 | |
| 258 /* Position in buffer at which display started | |
| 259 the last time this buffer was displayed. */ | |
| 260 int last_window_start; | |
| 261 | |
| 262 /* Everything from here down must be a Lisp_Object */ | |
| 263 | |
| 1204 | 264 #define MARKED_SLOT(x) Lisp_Object x; |
| 428 | 265 #include "bufslots.h" |
| 266 #undef MARKED_SLOT | |
| 267 }; | |
| 268 | |
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269 DECLARE_LISP_OBJECT (buffer, struct buffer); |
| 428 | 270 #define XBUFFER(x) XRECORD (x, buffer, struct buffer) |
| 617 | 271 #define wrap_buffer(p) wrap_record (p, buffer) |
| 428 | 272 #define BUFFERP(x) RECORDP (x, buffer) |
| 273 #define CHECK_BUFFER(x) CHECK_RECORD (x, buffer) | |
| 274 #define CONCHECK_BUFFER(x) CONCHECK_RECORD (x, buffer) | |
| 275 | |
| 276 #define BUFFER_LIVE_P(b) (!NILP ((b)->name)) | |
| 277 | |
| 278 #define CHECK_LIVE_BUFFER(x) do { \ | |
| 279 CHECK_BUFFER (x); \ | |
| 280 if (!BUFFER_LIVE_P (XBUFFER (x))) \ | |
| 281 dead_wrong_type_argument (Qbuffer_live_p, (x)); \ | |
| 282 } while (0) | |
| 283 | |
| 284 #define CONCHECK_LIVE_BUFFER(x) do { \ | |
| 285 CONCHECK_BUFFER (x); \ | |
| 286 if (!BUFFER_LIVE_P (XBUFFER (x))) \ | |
| 287 x = wrong_type_argument (Qbuffer_live_p, (x)); \ | |
| 288 } while (0) | |
| 289 | |
| 290 | |
| 291 #define BUFFER_BASE_BUFFER(b) ((b)->base_buffer ? (b)->base_buffer : (b)) | |
| 292 | |
| 293 /* Map over buffers sharing the same text as MPS_BUF. MPS_BUFVAR is a | |
| 294 variable that gets the buffer values (beginning with the base | |
| 295 buffer, then the children), and MPS_BUFCONS should be a temporary | |
| 296 Lisp_Object variable. */ | |
| 647 | 297 #define MAP_INDIRECT_BUFFERS(mps_buf, mps_bufvar, mps_bufcons) \ |
| 298 for (mps_bufcons = Qunbound, \ | |
| 299 mps_bufvar = BUFFER_BASE_BUFFER (mps_buf); \ | |
| 300 UNBOUNDP (mps_bufcons) ? \ | |
| 301 (mps_bufcons = mps_bufvar->indirect_children, \ | |
| 302 1) \ | |
| 303 : (!NILP (mps_bufcons) \ | |
| 304 && (mps_bufvar = XBUFFER (XCAR (mps_bufcons)), 1) \ | |
| 305 && (mps_bufcons = XCDR (mps_bufcons), 1)); \ | |
| 428 | 306 ) |
| 307 | |
| 308 | |
| 826 | 309 /* All macros below follow the three golden rules of macros (see text.h), |
| 310 with the following exception: | |
| 311 | |
| 312 -- 'struct buffer *' arguments can be evaluated more than once. | |
| 313 */ | |
| 314 | |
| 428 | 315 /*----------------------------------------------------------------------*/ |
| 316 /* Accessor macros for important positions in a buffer */ | |
| 317 /*----------------------------------------------------------------------*/ | |
| 318 | |
| 319 /* We put them here because some stuff below wants them before the | |
| 320 place where we would normally put them. */ | |
| 321 | |
| 322 /* None of these are lvalues. Use the settor macros below to change | |
| 323 the positions. */ | |
| 324 | |
| 325 /* Beginning of buffer. */ | |
| 826 | 326 #define BYTE_BUF_BEG(buf) ((Bytebpos) 1) |
| 665 | 327 #define BUF_BEG(buf) ((Charbpos) 1) |
| 428 | 328 |
| 329 /* Beginning of accessible range of buffer. */ | |
| 826 | 330 #define BYTE_BUF_BEGV(buf) ((buf)->begv + 0) |
| 428 | 331 #define BUF_BEGV(buf) ((buf)->bufbegv + 0) |
| 332 | |
| 333 /* End of accessible range of buffer. */ | |
| 826 | 334 #define BYTE_BUF_ZV(buf) ((buf)->zv + 0) |
| 428 | 335 #define BUF_ZV(buf) ((buf)->bufzv + 0) |
| 336 | |
| 337 /* End of buffer. */ | |
| 826 | 338 #define BYTE_BUF_Z(buf) ((buf)->text->z + 0) |
| 428 | 339 #define BUF_Z(buf) ((buf)->text->bufz + 0) |
| 340 | |
| 2367 | 341 /* Gap location. */ |
| 342 #define BYTE_BUF_GPT(buf) ((buf)->text->gpt + 0) | |
| 343 #define BUF_GPT(buf) ((buf)->text->bufgpt + 0) | |
| 344 | |
| 428 | 345 /* Point. */ |
| 826 | 346 #define BYTE_BUF_PT(buf) ((buf)->pt + 0) |
| 428 | 347 #define BUF_PT(buf) ((buf)->bufpt + 0) |
| 348 | |
| 826 | 349 /* Internal format of buffer. */ |
| 350 #ifdef MULE | |
| 351 #define BUF_FORMAT(buf) ((buf)->text->format) | |
| 352 #else | |
| 353 #define BUF_FORMAT(buf) FORMAT_DEFAULT | |
| 354 #endif | |
| 355 | |
| 428 | 356 /*----------------------------------------------------------------------*/ |
| 826 | 357 /* Validating byte positions */ |
| 428 | 358 /*----------------------------------------------------------------------*/ |
| 359 | |
| 826 | 360 /* Address of byte at position POS in buffer, no error checking. */ |
| 361 DECLARE_INLINE_HEADER ( | |
| 867 | 362 Ibyte * |
| 826 | 363 BYTE_BUF_BYTE_ADDRESS_NO_VERIFY (struct buffer *buf, Bytebpos pos) |
| 364 ) | |
| 428 | 365 { |
| 366 return (buf->text->beg + | |
| 367 ((pos >= buf->text->gpt ? (pos + buf->text->gap_size) : pos) | |
| 368 - 1)); | |
| 369 } | |
| 370 | |
| 826 | 371 /* Given a byte position, does it point to the beginning of a character? |
| 372 */ | |
| 373 #ifdef MULE | |
| 374 DECLARE_INLINE_HEADER ( | |
| 375 int | |
| 376 VALID_BYTEBPOS_P (struct buffer *buf, Bytebpos x) | |
| 377 ) | |
| 428 | 378 { |
| 826 | 379 switch (BUF_FORMAT (buf)) |
| 380 { | |
| 381 case FORMAT_DEFAULT: | |
| 867 | 382 return ibyte_first_byte_p (*BYTE_BUF_BYTE_ADDRESS_NO_VERIFY (buf, x)); |
| 826 | 383 case FORMAT_16_BIT_FIXED: |
| 384 return ((x - 1) & 1) == 0; | |
| 385 case FORMAT_32_BIT_FIXED: | |
| 386 return ((x - 1) & 3) == 0; | |
| 387 default: | |
| 388 return 1; | |
| 389 } | |
| 428 | 390 } |
| 391 #else | |
| 665 | 392 # define VALID_BYTEBPOS_P(buf, x) 1 |
| 428 | 393 #endif |
| 394 | |
| 826 | 395 /* If error-checking is enabled, assert that the given char position is |
| 396 within range. Otherwise, do nothing. | |
| 397 */ | |
| 398 # define ASSERT_VALID_CHARBPOS_UNSAFE(buf, x) do { \ | |
| 399 text_checking_assert (BUFFER_LIVE_P (buf)); \ | |
| 400 text_checking_assert ((x) >= BUF_BEG (buf) && x <= BUF_Z (buf)); \ | |
| 428 | 401 } while (0) |
| 826 | 402 |
| 403 /* If error-checking is enabled, assert that the given byte position is | |
| 404 within range and points to the beginning of a character or to the end of | |
| 405 the buffer. Otherwise, do nothing. | |
| 406 */ | |
| 407 # define ASSERT_VALID_BYTEBPOS_UNSAFE(buf, x) do { \ | |
| 408 text_checking_assert (BUFFER_LIVE_P (buf)); \ | |
| 409 text_checking_assert ((x) >= BYTE_BUF_BEG (buf) && x <= BYTE_BUF_Z (buf)); \ | |
| 410 text_checking_assert (VALID_BYTEBPOS_P (buf, x)); \ | |
| 428 | 411 } while (0) |
| 826 | 412 |
| 413 /* If error-checking is enabled, assert that the given byte position is | |
| 414 within range and satisfies ASSERT_VALID_BYTEBPOS() and also does not | |
| 415 refer to the beginning of the buffer. (i.e. movement backwards is OK.) | |
| 416 Otherwise, do nothing. | |
| 417 */ | |
| 418 # define ASSERT_VALID_BYTEBPOS_BACKWARD_UNSAFE(buf, x) do { \ | |
| 419 text_checking_assert (BUFFER_LIVE_P (buf)); \ | |
| 420 text_checking_assert ((x) > BYTE_BUF_BEG (buf) && x <= BYTE_BUF_Z (buf)); \ | |
| 421 text_checking_assert (VALID_BYTEBPOS_P (buf, x)); \ | |
| 428 | 422 } while (0) |
| 423 | |
| 826 | 424 /* If error-checking is enabled, assert that the given byte position is |
| 425 within range and satisfies ASSERT_VALID_BYTEBPOS() and also does not | |
| 426 refer to the end of the buffer. (i.e. movement forwards is OK.) | |
| 427 Otherwise, do nothing. | |
| 428 */ | |
| 429 # define ASSERT_VALID_BYTEBPOS_FORWARD_UNSAFE(buf, x) do { \ | |
| 430 text_checking_assert (BUFFER_LIVE_P (buf)); \ | |
| 431 text_checking_assert ((x) >= BYTE_BUF_BEG (buf) && x < BYTE_BUF_Z (buf)); \ | |
| 432 text_checking_assert (VALID_BYTEBPOS_P (buf, x)); \ | |
| 433 } while (0) | |
| 428 | 434 |
| 435 #ifdef MULE | |
| 826 | 436 /* Make sure that the given byte position is pointing to the beginning of a |
| 437 character. If not, back up until this is the case. Note that there are | |
| 438 not too many places where it is legitimate to do this sort of thing. | |
| 439 It's an error if you're passed an "invalid" byte position. | |
| 440 */ | |
| 441 # define VALIDATE_BYTEBPOS_BACKWARD(buf, x) do { \ | |
| 442 switch (BUF_FORMAT (buf)) \ | |
| 443 { \ | |
| 444 case FORMAT_DEFAULT: \ | |
| 445 { \ | |
| 867 | 446 Ibyte *VBB_ptr = BYTE_BUF_BYTE_ADDRESS_NO_VERIFY (buf, x); \ |
| 447 while (!ibyte_first_byte_p (*VBB_ptr)) \ | |
| 826 | 448 VBB_ptr--, (x)--; \ |
| 449 } \ | |
| 450 break; \ | |
| 451 case FORMAT_16_BIT_FIXED: \ | |
| 452 if (((x - 1) & 1) != 0) \ | |
| 453 x--; \ | |
| 454 break; \ | |
| 455 case FORMAT_32_BIT_FIXED: \ | |
| 456 while (((x - 1) & 3) != 0) \ | |
| 457 x--; \ | |
| 458 break; \ | |
| 459 default: \ | |
| 460 break; \ | |
| 461 } \ | |
| 428 | 462 } while (0) |
| 463 #else | |
| 665 | 464 # define VALIDATE_BYTEBPOS_BACKWARD(buf, x) |
| 428 | 465 #endif |
| 466 | |
| 467 #ifdef MULE | |
| 826 | 468 /* Make sure that the given byte position is pointing to the beginning of a |
| 469 character. If not, move forward until this is the case. Note that | |
| 470 there are not too many places where it is legitimate to do this sort of | |
| 471 thing. It's an error if you're passed an "invalid" byte position. | |
| 472 */ | |
| 473 # define VALIDATE_BYTEBPOS_FORWARD(buf, x) do { \ | |
| 474 switch (BUF_FORMAT (buf)) \ | |
| 475 { \ | |
| 476 case FORMAT_DEFAULT: \ | |
| 477 { \ | |
| 867 | 478 Ibyte *VBF_ptr = BYTE_BUF_BYTE_ADDRESS_NO_VERIFY (buf, x); \ |
| 479 while (!ibyte_first_byte_p (*VBF_ptr)) \ | |
| 826 | 480 VBF_ptr++, (x)++; \ |
| 481 } \ | |
| 482 break; \ | |
| 483 case FORMAT_16_BIT_FIXED: \ | |
| 484 if (((x - 1) & 1) != 0) \ | |
| 485 x++; \ | |
| 486 break; \ | |
| 487 case FORMAT_32_BIT_FIXED: \ | |
| 488 while (((x - 1) & 3) != 0) \ | |
| 489 x++; \ | |
| 490 break; \ | |
| 491 default: \ | |
| 492 break; \ | |
| 493 } \ | |
| 428 | 494 } while (0) |
| 495 #else | |
| 665 | 496 # define VALIDATE_BYTEBPOS_FORWARD(buf, x) |
| 428 | 497 #endif |
| 498 | |
| 826 | 499 /*----------------------------------------------------------------------*/ |
| 500 /* Working with byte positions */ | |
| 501 /*----------------------------------------------------------------------*/ | |
| 502 | |
| 503 | |
| 504 /* Given a byte position (assumed to point at the beginning of a | |
| 505 character), modify that value so it points to the beginning of the next | |
| 506 character. | |
| 507 | |
| 508 Note that in the simplest case (no MULE, no ERROR_CHECK_TEXT), | |
| 509 this crap reduces down to simply (x)++. */ | |
| 428 | 510 |
| 665 | 511 #define INC_BYTEBPOS(buf, x) do \ |
| 428 | 512 { \ |
| 826 | 513 ASSERT_VALID_BYTEBPOS_FORWARD_UNSAFE (buf, x); \ |
| 428 | 514 /* Note that we do the increment first to \ |
| 515 make sure that the pointer in \ | |
| 665 | 516 VALIDATE_BYTEBPOS_FORWARD() ends up on \ |
| 428 | 517 the correct side of the gap */ \ |
| 518 (x)++; \ | |
| 665 | 519 VALIDATE_BYTEBPOS_FORWARD (buf, x); \ |
| 428 | 520 } while (0) |
| 521 | |
| 826 | 522 /* Given a byte position (assumed to point at the beginning of a |
| 523 character), modify that value so it points to the beginning of the | |
| 867 | 524 previous character. Unlike for DEC_IBYTEPTR(), we can do all the |
| 826 | 525 assert()s because there are sentinels at the beginning of the gap and |
| 526 the end of the buffer. | |
| 527 | |
| 528 Note that in the simplest case (no MULE, no ERROR_CHECK_TEXT), this | |
| 529 crap reduces down to simply (x)--. */ | |
| 428 | 530 |
| 665 | 531 #define DEC_BYTEBPOS(buf, x) do \ |
| 428 | 532 { \ |
| 771 | 533 ASSERT_VALID_BYTEBPOS_BACKWARD_UNSAFE (buf, x); \ |
| 428 | 534 /* Note that we do the decrement first to \ |
| 535 make sure that the pointer in \ | |
| 665 | 536 VALIDATE_BYTEBPOS_BACKWARD() ends up on \ |
| 428 | 537 the correct side of the gap */ \ |
| 538 (x)--; \ | |
| 665 | 539 VALIDATE_BYTEBPOS_BACKWARD (buf, x); \ |
| 428 | 540 } while (0) |
| 541 | |
| 826 | 542 DECLARE_INLINE_HEADER ( |
| 543 Bytebpos | |
| 4860 | 544 prev_bytebpos (struct buffer *buf, Bytebpos x) |
| 826 | 545 ) |
| 428 | 546 { |
| 665 | 547 DEC_BYTEBPOS (buf, x); |
| 428 | 548 return x; |
| 549 } | |
| 550 | |
| 826 | 551 DECLARE_INLINE_HEADER ( |
| 552 Bytebpos | |
| 4860 | 553 next_bytebpos (struct buffer *buf, Bytebpos x) |
| 826 | 554 ) |
| 428 | 555 { |
| 665 | 556 INC_BYTEBPOS (buf, x); |
| 428 | 557 return x; |
| 558 } | |
| 559 | |
| 826 | 560 /* A constant representing an invalid Bytebpos. Valid Bytebposes |
| 561 can never have this value. */ | |
| 562 | |
| 665 | 563 #define BYTEBPOS_INVALID ((Bytebpos) -1) |
| 428 | 564 |
| 565 /*----------------------------------------------------------------------*/ | |
| 826 | 566 /* Converting between byte and character positions */ |
| 428 | 567 /*----------------------------------------------------------------------*/ |
| 568 | |
| 2367 | 569 /* |
| 771 | 570 |
| 2367 | 571 Info on Byte-Char conversion: |
| 428 | 572 |
| 2367 | 573 (Info-goto-node "(internals)Byte-Char Position Conversion") |
| 574 */ | |
| 428 | 575 |
| 2367 | 576 #ifdef MULE |
| 428 | 577 |
| 826 | 578 Bytebpos charbpos_to_bytebpos_func (struct buffer *buf, Charbpos x); |
| 579 Charbpos bytebpos_to_charbpos_func (struct buffer *buf, Bytebpos x); | |
| 428 | 580 extern short three_to_one_table[]; |
| 581 | |
| 826 | 582 #endif /* MULE */ |
| 583 | |
| 584 /* Given a Charbpos, return the equivalent Bytebpos. */ | |
| 585 | |
| 586 DECLARE_INLINE_HEADER ( | |
| 587 Bytebpos | |
| 4860 | 588 charbpos_to_bytebpos (struct buffer *buf, Charbpos x) |
| 826 | 589 ) |
| 428 | 590 { |
| 826 | 591 Bytebpos retval; |
| 592 ASSERT_VALID_CHARBPOS_UNSAFE (buf, x); | |
| 593 #ifdef MULE | |
| 594 if (buf->text->entirely_one_byte_p) | |
| 595 retval = (Bytebpos) x; | |
| 596 else if (BUF_FORMAT (buf) == FORMAT_16_BIT_FIXED) | |
| 597 retval = (Bytebpos) (x << 1); | |
| 598 else if (BUF_FORMAT (buf) == FORMAT_32_BIT_FIXED) | |
| 599 retval = (Bytebpos) (x << 2); | |
| 2367 | 600 #ifdef OLD_BYTE_CHAR |
| 826 | 601 else if (x >= buf->text->mule_bufmin && x <= buf->text->mule_bufmax) |
| 602 retval = (buf->text->mule_bytmin + | |
| 428 | 603 ((x - buf->text->mule_bufmin) << buf->text->mule_shifter) + |
| 814 | 604 (buf->text->mule_three_p ? (x - buf->text->mule_bufmin) : |
| 605 (Bytebpos) 0)); | |
| 2367 | 606 #endif /* OLD_BYTE_CHAR */ |
| 428 | 607 else |
| 826 | 608 retval = charbpos_to_bytebpos_func (buf, x); |
| 609 #else | |
| 610 retval = (Bytebpos) x; | |
| 611 #endif | |
| 612 ASSERT_VALID_BYTEBPOS_UNSAFE (buf, retval); | |
| 613 return retval; | |
| 614 } | |
| 615 | |
| 616 /* Given a Bytebpos, return the equivalent Charbpos. */ | |
| 617 | |
| 618 DECLARE_INLINE_HEADER ( | |
| 619 Charbpos | |
| 4860 | 620 bytebpos_to_charbpos (struct buffer *buf, Bytebpos x) |
| 826 | 621 ) |
| 622 { | |
| 623 Charbpos retval; | |
| 624 ASSERT_VALID_BYTEBPOS_UNSAFE (buf, x); | |
| 625 #ifdef MULE | |
| 626 if (buf->text->entirely_one_byte_p) | |
| 627 retval = (Charbpos) x; | |
| 628 else if (BUF_FORMAT (buf) == FORMAT_16_BIT_FIXED) | |
| 629 retval = (Charbpos) (x >> 1); | |
| 630 else if (BUF_FORMAT (buf) == FORMAT_32_BIT_FIXED) | |
| 631 retval = (Charbpos) (x >> 2); | |
| 2367 | 632 #ifdef OLD_BYTE_CHAR |
| 826 | 633 else if (x >= buf->text->mule_bytmin && x <= buf->text->mule_bytmax) |
| 634 retval = (buf->text->mule_bufmin + | |
| 635 ((buf->text->mule_three_p | |
| 636 ? three_to_one_table[x - buf->text->mule_bytmin] | |
| 637 : (x - buf->text->mule_bytmin) >> buf->text->mule_shifter))); | |
| 2367 | 638 #endif /* OLD_BYTE_CHAR */ |
| 826 | 639 else |
| 640 retval = bytebpos_to_charbpos_func (buf, x); | |
| 641 #else | |
| 642 retval = (Charbpos) x; | |
| 643 #endif | |
| 644 ASSERT_VALID_CHARBPOS_UNSAFE (buf, retval); | |
| 645 return retval; | |
| 646 } | |
| 647 | |
| 648 /* Given a Bytebpos, return the equivalent Charbpos as a Lisp Object. */ | |
| 649 | |
|
5581
56144c8593a8
Mechanically change INT to FIXNUM in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5402
diff
changeset
|
650 #define make_charbpos(buf, ind) make_fixnum (bytebpos_to_charbpos (buf, ind)) |
| 826 | 651 |
| 652 /*----------------------------------------------------------------------*/ | |
| 653 /* Converting between byte and memory positions */ | |
| 654 /*----------------------------------------------------------------------*/ | |
| 655 | |
| 656 DECLARE_INLINE_HEADER ( | |
| 657 int | |
| 658 valid_membpos_p (struct buffer *buf, Membpos x) | |
| 659 ) | |
| 660 { | |
| 661 return ((x >= 1 && x <= (Membpos) buf->text->gpt) || | |
| 662 (x > (Membpos) (buf->text->gpt + buf->text->gap_size) && | |
| 663 x <= (Membpos) (buf->text->z + buf->text->gap_size))); | |
| 428 | 664 } |
| 665 | |
| 826 | 666 DECLARE_INLINE_HEADER ( |
| 667 Membpos | |
| 668 bytebpos_to_membpos (struct buffer *buf, Bytebpos x) | |
| 669 ) | |
| 670 { | |
| 671 ASSERT_VALID_BYTEBPOS_UNSAFE (buf, x); | |
| 672 return (Membpos) ((x > buf->text->gpt) ? (x + buf->text->gap_size) : x); | |
| 673 } | |
| 674 | |
| 675 | |
| 676 DECLARE_INLINE_HEADER ( | |
| 677 Bytebpos | |
| 678 membpos_to_bytebpos (struct buffer *buf, Membpos x) | |
| 679 ) | |
| 680 { | |
| 681 Bytebpos retval; | |
| 682 text_checking_assert (valid_membpos_p (buf, x)); | |
| 683 retval = (Bytebpos) ((x > (Membpos) buf->text->gpt) ? | |
| 684 x - buf->text->gap_size : | |
| 685 x); | |
| 686 ASSERT_VALID_BYTEBPOS_UNSAFE (buf, retval); | |
| 687 return retval; | |
| 688 } | |
| 689 | |
| 690 DECLARE_INLINE_HEADER ( | |
| 691 Charbpos | |
| 692 membpos_to_charbpos (struct buffer *buf, Membpos x) | |
| 693 ) | |
| 428 | 694 { |
| 826 | 695 return bytebpos_to_charbpos (buf, membpos_to_bytebpos (buf, x)); |
| 696 } | |
| 697 | |
| 698 DECLARE_INLINE_HEADER ( | |
| 699 Membpos | |
| 700 charbpos_to_membpos (struct buffer *buf, Charbpos x) | |
| 701 ) | |
| 702 { | |
| 703 return bytebpos_to_membpos (buf, charbpos_to_bytebpos (buf, x)); | |
| 704 } | |
| 705 | |
| 706 /*----------------------------------------------------------------------*/ | |
| 707 /* Generalized buffer/string position convertors */ | |
| 708 /*----------------------------------------------------------------------*/ | |
| 709 | |
| 710 /* These macros generalize many standard buffer-position functions to | |
| 711 either a buffer or a string. */ | |
| 712 | |
| 713 /* Converting between Memxpos's and Bytexpos's, for a buffer-or-string. | |
| 714 For strings, this is a no-op. For buffers, this resolves | |
| 715 to the standard membpos<->bytebpos converters. */ | |
| 716 | |
| 717 DECLARE_INLINE_HEADER ( | |
| 718 Memxpos buffer_or_string_bytexpos_to_memxpos (Lisp_Object obj, Bytexpos pos) | |
| 719 ) | |
| 720 { | |
| 721 return (BUFFERP (obj) ? bytebpos_to_membpos (XBUFFER (obj), pos) : | |
| 722 (Memxpos) pos); | |
| 428 | 723 } |
| 724 | |
| 826 | 725 DECLARE_INLINE_HEADER ( |
| 726 Bytexpos buffer_or_string_memxpos_to_bytexpos (Lisp_Object obj, Memxpos pos) | |
| 727 ) | |
| 728 { | |
| 729 return (BUFFERP (obj) ? membpos_to_bytebpos (XBUFFER (obj), pos) : | |
| 730 (Bytexpos) pos); | |
| 731 } | |
| 732 | |
| 733 /* Converting between Charxpos's and Bytexpos's, for a buffer-or-string. | |
| 734 For strings, this maps to the bytecount<->charcount converters. */ | |
| 735 | |
| 736 DECLARE_INLINE_HEADER ( | |
| 737 Bytexpos buffer_or_string_charxpos_to_bytexpos (Lisp_Object obj, Charxpos pos) | |
| 738 ) | |
| 739 { | |
| 740 return (BUFFERP (obj) ? charbpos_to_bytebpos (XBUFFER (obj), pos) : | |
| 741 (Bytexpos) string_index_char_to_byte (obj, pos)); | |
| 742 } | |
| 743 | |
| 744 DECLARE_INLINE_HEADER ( | |
| 745 Charxpos buffer_or_string_bytexpos_to_charxpos (Lisp_Object obj, Bytexpos pos) | |
| 746 ) | |
| 747 { | |
| 748 return (BUFFERP (obj) ? bytebpos_to_charbpos (XBUFFER (obj), pos) : | |
| 749 (Charxpos) string_index_byte_to_char (obj, pos)); | |
| 750 } | |
| 428 | 751 |
| 826 | 752 /* Similar for Charxpos's and Memxpos's. */ |
| 753 | |
| 754 DECLARE_INLINE_HEADER ( | |
| 755 Memxpos buffer_or_string_charxpos_to_memxpos (Lisp_Object obj, Charxpos pos) | |
| 756 ) | |
| 757 { | |
| 758 return (BUFFERP (obj) ? charbpos_to_membpos (XBUFFER (obj), pos) : | |
| 759 (Memxpos) string_index_char_to_byte (obj, pos)); | |
| 760 } | |
| 428 | 761 |
| 826 | 762 DECLARE_INLINE_HEADER ( |
| 763 Charxpos buffer_or_string_memxpos_to_charxpos (Lisp_Object obj, Memxpos pos) | |
| 764 ) | |
| 765 { | |
| 766 return (BUFFERP (obj) ? membpos_to_charbpos (XBUFFER (obj), pos) : | |
| 767 (Charxpos) string_index_byte_to_char (obj, pos)); | |
| 768 } | |
| 428 | 769 |
| 826 | 770 DECLARE_INLINE_HEADER ( |
| 771 Internal_Format buffer_or_other_internal_format (Lisp_Object obj) | |
| 772 ) | |
| 773 { | |
| 774 return BUFFERP (obj) ? BUF_FORMAT (XBUFFER (obj)) : FORMAT_DEFAULT; | |
| 775 } | |
| 776 | |
| 777 /* Return the index to the character before the one at X, | |
| 778 in a buffer or string. */ | |
| 428 | 779 |
| 826 | 780 DECLARE_INLINE_HEADER ( |
| 781 Bytebpos | |
| 782 prev_bytexpos (Lisp_Object obj, Bytebpos x) | |
| 783 ) | |
| 784 { | |
| 785 return BUFFERP (obj) ? prev_bytebpos (XBUFFER (obj), x) : | |
| 786 prev_string_index (obj, x); | |
| 787 } | |
| 788 | |
| 789 /* Return the index to the character after the one at X, | |
| 790 in a buffer or string. */ | |
| 428 | 791 |
| 826 | 792 DECLARE_INLINE_HEADER ( |
| 793 Bytebpos | |
| 794 next_bytexpos (Lisp_Object obj, Bytebpos x) | |
| 795 ) | |
| 796 { | |
| 797 return BUFFERP (obj) ? next_bytebpos (XBUFFER (obj), x) : | |
| 798 next_string_index (obj, x); | |
| 799 } | |
| 800 | |
| 801 /*----------------------------------------------------------------------*/ | |
| 802 /* Converting between positions and addresses */ | |
| 803 /*----------------------------------------------------------------------*/ | |
| 428 | 804 |
| 826 | 805 /* Convert the address of a byte in the buffer into a position. */ |
| 806 DECLARE_INLINE_HEADER ( | |
| 807 Bytebpos | |
| 867 | 808 BYTE_BUF_PTR_BYTE_POS (struct buffer *buf, Ibyte *ptr) |
| 826 | 809 ) |
| 810 { | |
| 811 Bytebpos retval = (ptr - buf->text->beg + 1 | |
| 812 - ((ptr - buf->text->beg + 1) > buf->text->gpt | |
| 813 ? buf->text->gap_size : (Bytebpos) 0)); | |
| 814 ASSERT_VALID_BYTEBPOS_UNSAFE (buf, retval); | |
| 815 return retval; | |
| 816 } | |
| 817 | |
| 818 #define BUF_PTR_BYTE_POS(buf, ptr) \ | |
| 819 bytebpos_to_charbpos (buf, BYTE_BUF_PTR_BYTE_POS (buf, ptr)) | |
| 428 | 820 |
| 826 | 821 /* Address of byte at position POS in buffer. */ |
| 822 DECLARE_INLINE_HEADER ( | |
| 867 | 823 Ibyte * |
| 826 | 824 BYTE_BUF_BYTE_ADDRESS (struct buffer *buf, Bytebpos pos) |
| 825 ) | |
| 826 { | |
| 827 ASSERT_VALID_BYTEBPOS_UNSAFE (buf, pos); | |
| 828 return BYTE_BUF_BYTE_ADDRESS_NO_VERIFY (buf, pos); | |
| 829 } | |
| 830 | |
| 831 #define BUF_BYTE_ADDRESS(buf, pos) \ | |
| 832 BYTE_BUF_BYTE_ADDRESS (buf, charbpos_to_bytebpos (buf, pos)) | |
| 428 | 833 |
| 826 | 834 /* Address of byte before position POS in buffer. */ |
| 835 DECLARE_INLINE_HEADER ( | |
| 867 | 836 Ibyte * |
| 826 | 837 BYTE_BUF_BYTE_ADDRESS_BEFORE (struct buffer *buf, Bytebpos pos) |
| 838 ) | |
| 839 { | |
| 840 ASSERT_VALID_BYTEBPOS_UNSAFE (buf, pos); | |
| 841 return (buf->text->beg + | |
| 842 ((pos > buf->text->gpt ? (pos + buf->text->gap_size) : pos) | |
| 843 - 2)); | |
| 844 } | |
| 845 | |
| 846 #define BUF_BYTE_ADDRESS_BEFORE(buf, pos) \ | |
| 847 BYTE_BUF_BYTE_ADDRESS_BEFORE (buf, charbpos_to_bytebpos (buf, pos)) | |
| 428 | 848 |
| 849 /*----------------------------------------------------------------------*/ | |
| 850 /* Converting between buffer bytes and Emacs characters */ | |
| 851 /*----------------------------------------------------------------------*/ | |
| 852 | |
| 853 /* The character at position POS in buffer. */ | |
| 826 | 854 |
| 855 #define BYTE_BUF_FETCH_CHAR(buf, pos) \ | |
| 867 | 856 itext_ichar_fmt (BYTE_BUF_BYTE_ADDRESS (buf, pos), BUF_FORMAT (buf), \ |
| 826 | 857 wrap_buffer (buf)) |
| 428 | 858 #define BUF_FETCH_CHAR(buf, pos) \ |
| 826 | 859 BYTE_BUF_FETCH_CHAR (buf, charbpos_to_bytebpos (buf, pos)) |
| 860 | |
| 861 /* The "raw value" of the character at position POS in buffer. | |
| 867 | 862 See ichar_to_raw(). */ |
| 826 | 863 |
| 864 #define BYTE_BUF_FETCH_CHAR_RAW(buf, pos) \ | |
| 867 | 865 itext_ichar_raw_fmt (BYTE_BUF_BYTE_ADDRESS (buf, pos), BUF_FORMAT (buf)) |
| 826 | 866 #define BUF_FETCH_CHAR_RAW(buf, pos) \ |
| 867 BYTE_BUF_FETCH_CHAR_RAW (buf, charbpos_to_bytebpos (buf, pos)) | |
| 428 | 868 |
| 869 /* The character at position POS in buffer, as a string. This is | |
| 867 | 870 equivalent to set_itext_ichar (str, BUF_FETCH_CHAR (buf, pos)) |
| 428 | 871 but is faster for Mule. */ |
| 872 | |
| 867 | 873 # define BYTE_BUF_ITEXT_COPY_ICHAR(buf, pos, str) \ |
| 826 | 874 (BUF_FORMAT (buf) == FORMAT_DEFAULT ? \ |
| 867 | 875 itext_copy_ichar (BYTE_BUF_BYTE_ADDRESS (buf, pos), str) : \ |
| 876 set_itext_ichar (str, BYTE_BUF_FETCH_CHAR (buf, pos))) | |
| 877 #define BUF_ITEXT_COPY_ICHAR(buf, pos, str) \ | |
| 878 BYTE_BUF_ITEXT_COPY_ICHAR (buf, charbpos_to_bytebpos (buf, pos), str) | |
| 428 | 879 |
| 880 | |
| 881 /************************************************************************/ | |
| 440 | 882 /* */ |
| 428 | 883 /* higher-level buffer-position functions */ |
| 884 /* */ | |
| 885 /************************************************************************/ | |
| 886 | |
| 887 /*----------------------------------------------------------------------*/ | |
| 888 /* Settor macros for important positions in a buffer */ | |
| 889 /*----------------------------------------------------------------------*/ | |
| 890 | |
| 891 /* Set beginning of accessible range of buffer. */ | |
| 826 | 892 #define SET_BOTH_BUF_BEGV(buf, val, bpval) \ |
| 428 | 893 do \ |
| 894 { \ | |
| 826 | 895 (buf)->begv = (bpval); \ |
| 428 | 896 (buf)->bufbegv = (val); \ |
| 897 } while (0) | |
| 898 | |
| 899 /* Set end of accessible range of buffer. */ | |
| 826 | 900 #define SET_BOTH_BUF_ZV(buf, val, bpval) \ |
| 428 | 901 do \ |
| 902 { \ | |
| 826 | 903 (buf)->zv = (bpval); \ |
| 428 | 904 (buf)->bufzv = (val); \ |
| 905 } while (0) | |
| 906 | |
| 907 /* Set point. */ | |
| 908 /* Since BEGV and ZV are almost never set, it's reasonable to enforce | |
| 665 | 909 the restriction that the Charbpos and Bytebpos values must both be |
| 428 | 910 specified. However, point is set in lots and lots of places. So |
| 911 we provide the ability to specify both (for efficiency) or just | |
| 912 one. */ | |
| 826 | 913 #define BOTH_BUF_SET_PT(buf, val, bpval) set_buffer_point (buf, val, bpval) |
| 914 #define BYTE_BUF_SET_PT(buf, bpval) \ | |
| 915 do \ | |
| 916 { \ | |
| 917 Bytebpos __bpbsp_bpval = (bpval); \ | |
| 918 BOTH_BUF_SET_PT (buf, bytebpos_to_charbpos (buf, __bpbsp_bpval), \ | |
| 919 __bpbsp_bpval); \ | |
| 920 } while (0) | |
| 921 #define BUF_SET_PT(buf, value) \ | |
| 922 do \ | |
| 923 { \ | |
| 924 Bytebpos __bsp_val = (value); \ | |
| 925 BOTH_BUF_SET_PT (buf, __bsp_val, charbpos_to_bytebpos (buf, __bsp_val)); \ | |
| 926 } while (0) | |
| 428 | 927 |
| 928 | |
| 929 #if 0 /* FSFmacs */ | |
| 930 /* These macros exist in FSFmacs because SET_PT() in FSFmacs incorrectly | |
| 931 does too much stuff, such as moving out of invisible extents. */ | |
| 932 #define TEMP_SET_PT(position) (temp_set_point ((position), current_buffer)) | |
| 933 #define SET_BUF_PT(buf, value) ((buf)->pt = (value)) | |
| 934 #endif /* FSFmacs */ | |
| 935 | |
| 936 /*----------------------------------------------------------------------*/ | |
| 937 /* Miscellaneous buffer values */ | |
| 938 /*----------------------------------------------------------------------*/ | |
| 939 | |
| 940 /* Number of characters in buffer */ | |
| 941 #define BUF_SIZE(buf) (BUF_Z (buf) - BUF_BEG (buf)) | |
| 942 | |
| 943 /* Is this buffer narrowed? */ | |
| 944 #define BUF_NARROWED(buf) \ | |
| 826 | 945 ((BYTE_BUF_BEGV (buf) != BYTE_BUF_BEG (buf)) || \ |
| 946 (BYTE_BUF_ZV (buf) != BYTE_BUF_Z (buf))) | |
| 428 | 947 |
| 826 | 948 /* Modification count */ |
| 428 | 949 #define BUF_MODIFF(buf) ((buf)->text->modiff) |
| 950 | |
| 826 | 951 /* Saved modification count */ |
| 428 | 952 #define BUF_SAVE_MODIFF(buf) ((buf)->text->save_modiff) |
| 953 | |
| 954 /* Face changed. */ | |
| 955 #define BUF_FACECHANGE(buf) ((buf)->face_change) | |
| 956 | |
| 826 | 957 DECLARE_INLINE_HEADER ( |
| 958 int | |
| 959 POINT_MARKER_P (Lisp_Object marker) | |
| 960 ) | |
| 961 { | |
| 962 return (XMARKER (marker)->buffer != 0 && | |
| 963 EQ (marker, XMARKER (marker)->buffer->point_marker)); | |
| 964 } | |
| 428 | 965 |
| 966 #define BUF_MARKERS(buf) ((buf)->markers) | |
| 967 | |
| 826 | 968 #ifdef MULE |
| 969 | |
| 970 DECLARE_INLINE_HEADER ( | |
| 971 Lisp_Object | |
| 972 BUFFER_CATEGORY_TABLE (struct buffer *buf) | |
| 973 ) | |
| 974 { | |
| 975 return buf ? buf->category_table : Vstandard_category_table; | |
| 976 } | |
| 977 | |
| 978 #endif /* MULE */ | |
| 979 | |
| 980 DECLARE_INLINE_HEADER ( | |
| 981 Lisp_Object | |
| 982 BUFFER_SYNTAX_TABLE (struct buffer *buf) | |
| 983 ) | |
| 984 { | |
| 985 return buf ? buf->syntax_table : Vstandard_syntax_table; | |
| 986 } | |
| 987 | |
| 988 DECLARE_INLINE_HEADER ( | |
| 989 Lisp_Object | |
| 990 BUFFER_MIRROR_SYNTAX_TABLE (struct buffer *buf) | |
| 991 ) | |
| 992 { | |
| 993 return buf ? buf->mirror_syntax_table : | |
| 994 XCHAR_TABLE (Vstandard_syntax_table)->mirror_table; | |
| 995 } | |
| 996 | |
| 428 | 997 /* WARNING: |
| 998 | |
| 999 The new definitions of CEILING_OF() and FLOOR_OF() differ semantically | |
| 1000 from the old ones (in FSF Emacs and XEmacs 19.11 and before). | |
| 1001 Conversion is as follows: | |
| 1002 | |
| 826 | 1003 OLD_BYTE_CEILING_OF(n) = NEW_BYTE_CEILING_OF(n) - 1 |
| 1004 OLD_BYTE_FLOOR_OF(n) = NEW_BYTE_FLOOR_OF(n + 1) | |
| 428 | 1005 |
| 1006 The definitions were changed because the new definitions are more | |
| 771 | 1007 consistent with the way everything else works in XEmacs. |
| 428 | 1008 */ |
| 1009 | |
| 826 | 1010 /* Properties of CEILING_OF and FLOOR_OF (also apply to BYTE_ variants): |
| 428 | 1011 |
| 1012 1) FLOOR_OF (CEILING_OF (n)) = n | |
| 1013 CEILING_OF (FLOOR_OF (n)) = n | |
| 1014 | |
| 1015 2) CEILING_OF (n) = n if and only if n = ZV | |
| 1016 FLOOR_OF (n) = n if and only if n = BEGV | |
| 1017 | |
| 1018 3) CEILING_OF (CEILING_OF (n)) = ZV | |
| 1019 FLOOR_OF (FLOOR_OF (n)) = BEGV | |
| 1020 | |
| 1021 4) The bytes in the regions | |
| 1022 | |
| 1023 [BYTE_ADDRESS (n), BYTE_ADDRESS_BEFORE (CEILING_OF (n))] | |
| 1024 | |
| 1025 and | |
| 1026 | |
| 1027 [BYTE_ADDRESS (FLOOR_OF (n)), BYTE_ADDRESS_BEFORE (n)] | |
| 1028 | |
| 1029 are contiguous. | |
| 771 | 1030 |
| 1031 A typical loop using CEILING_OF to process contiguous ranges of text | |
| 1032 between [from, to) looks like this: | |
| 1033 | |
| 1034 { | |
| 1035 Bytebpos pos = from; | |
| 1036 | |
| 1037 while (pos < to) | |
| 1038 { | |
| 826 | 1039 Bytebpos ceil = BYTE_BUF_CEILING_OF (buf, pos); |
| 771 | 1040 ceil = min (to, ceil); |
| 867 | 1041 process_ibyte_string (BYTE_BUF_BYTE_ADDRESS (buf, pos), ceil - pos); |
| 771 | 1042 pos = ceil; |
| 1043 } | |
| 1044 } | |
| 1045 | |
| 1046 Currently there will be at most two iterations in the loop, but it is | |
| 1047 written in such a way that it will still work if the buffer | |
| 1048 representation is changed to have multiple gaps in it. | |
| 1049 */ | |
| 428 | 1050 |
| 826 | 1051 /* Return the maximum position in the buffer it is safe to scan forwards |
| 428 | 1052 past N to. This is used to prevent buffer scans from running into |
| 1053 the gap (e.g. search.c). All characters between N and CEILING_OF(N) | |
| 1054 are located contiguous in memory. Note that the character *at* | |
| 1055 CEILING_OF(N) is not contiguous in memory. */ | |
| 826 | 1056 #define BYTE_BUF_CEILING_OF(b, n) \ |
| 2367 | 1057 ((n) < BYTE_BUF_GPT (b) && BYTE_BUF_GPT (b) < BYTE_BUF_ZV (b) ? \ |
| 1058 BYTE_BUF_GPT (b) : BYTE_BUF_ZV (b)) | |
| 1059 #define BUF_CEILING_OF(b, n) \ | |
| 1060 ((n) < BUF_GPT (b) && BUF_GPT (b) < BUF_ZV (b) ? \ | |
| 1061 BUF_GPT (b) : BUF_ZV (b)) | |
| 428 | 1062 |
| 826 | 1063 /* Return the minimum position in the buffer it is safe to scan backwards |
| 428 | 1064 past N to. All characters between FLOOR_OF(N) and N are located |
| 1065 contiguous in memory. Note that the character *at* N may not be | |
| 1066 contiguous in memory. */ | |
| 2367 | 1067 #define BYTE_BUF_FLOOR_OF(b, n) \ |
| 1068 (BYTE_BUF_BEGV (b) < BYTE_BUF_GPT (b) && BYTE_BUF_GPT (b) < (n) ? \ | |
| 1069 BYTE_BUF_GPT (b) : BYTE_BUF_BEGV (b)) | |
| 1070 #define BUF_FLOOR_OF(b, n) \ | |
| 1071 (BUF_BEGV (b) < BUF_GPT (b) && BUF_GPT (b) < (n) ? \ | |
| 1072 BUF_GPT (b) : BUF_BEGV (b)) | |
| 428 | 1073 |
| 826 | 1074 #define BYTE_BUF_CEILING_OF_IGNORE_ACCESSIBLE(b, n) \ |
| 2367 | 1075 ((n) < BYTE_BUF_GPT (b) && BYTE_BUF_GPT (b) < BYTE_BUF_Z (b) ? \ |
| 1076 BYTE_BUF_GPT (b) : BYTE_BUF_Z (b)) | |
| 1077 #define BUF_CEILING_OF_IGNORE_ACCESSIBLE(b, n) \ | |
| 1078 ((n) < BUF_GPT (b) && BUF_GPT (b) < BUF_Z (b) ? \ | |
| 1079 BUF_GPT (b) : BUF_Z (b)) | |
| 428 | 1080 |
| 2367 | 1081 #define BYTE_BUF_FLOOR_OF_IGNORE_ACCESSIBLE(b, n) \ |
| 1082 (BYTE_BUF_BEG (b) < BYTE_BUF_GPT (b) && BYTE_BUF_GPT (b) < (n) ? \ | |
| 1083 BYTE_BUF_GPT (b) : BYTE_BUF_BEG (b)) | |
| 1084 #define BUF_FLOOR_OF_IGNORE_ACCESSIBLE(b, n) \ | |
| 1085 (BUF_BEG (b) < BUF_GPT (b) && BUF_GPT (b) < (n) ? \ | |
| 1086 BUF_GPT (b) : BUF_BEG (b)) | |
| 826 | 1087 |
| 1088 /* Iterate over contiguous chunks of text in buffer BUF, starting at POS, | |
| 1089 of length LEN. Evaluates POS and LEN only once, but BUF multiply. In | |
| 1090 each iteration, store the current chunk into RUNPTR/RUNLEN, which will | |
| 1091 be automatically declared (don't declare them yourself). This does not | |
| 1092 respect the limits of accessibility (BUF_BEGV/BUF_ZV); if you want these | |
| 1093 limits respected, you need to impose them yourself. | |
| 1094 | |
| 1095 NOTE: This must be surrounded with braces! */ | |
| 1096 | |
| 1097 #define BUFFER_TEXT_LOOP(buf, pos, len, runptr, runlen) \ | |
| 2367 | 1098 Ibyte *runptr; \ |
| 826 | 1099 Bytecount runlen; \ |
| 1100 Bytebpos BTL_pos = (pos); \ | |
| 1101 Bytebpos BTL_len = (len); \ | |
| 1102 for (runptr = BYTE_BUF_BYTE_ADDRESS (buf, BTL_pos), \ | |
| 1103 runlen = BYTE_BUF_CEILING_OF_IGNORE_ACCESSIBLE (buf, BTL_pos) - BTL_pos, \ | |
| 1104 runlen = min (BTL_len, runlen); \ | |
| 1105 BTL_len > 0; \ | |
| 1106 BTL_pos += runlen, \ | |
| 1107 BTL_len -= runlen, \ | |
| 1108 runptr = BYTE_BUF_BYTE_ADDRESS (buf, BTL_pos), \ | |
| 1109 runlen = BYTE_BUF_CEILING_OF_IGNORE_ACCESSIBLE (buf, BTL_pos) - BTL_pos, \ | |
| 1110 runlen = min (BTL_len, runlen)) | |
| 428 | 1111 |
| 1112 /* This structure marks which slots in a buffer have corresponding | |
| 1113 default values in Vbuffer_defaults. | |
| 1114 Each such slot has a nonzero value in this structure. | |
| 1115 The value has only one nonzero bit. | |
| 1116 | |
| 1117 When a buffer has its own local value for a slot, | |
| 1118 the bit for that slot (found in the same slot in this structure) | |
| 1119 is turned on in the buffer's local_var_flags slot. | |
| 1120 | |
| 1121 If a slot in this structure is zero, then even though there may | |
| 1122 be a DEFVAR_BUFFER_LOCAL for the slot, there is no default value for it; | |
| 1123 and the corresponding slot in Vbuffer_defaults is not used. */ | |
| 1124 | |
| 1125 extern struct buffer buffer_local_flags; | |
| 1126 | |
| 1127 | |
| 1128 /* Allocation of buffer data. */ | |
| 1129 | |
| 1130 #ifdef REL_ALLOC | |
| 1131 | |
| 440 | 1132 char *r_alloc (unsigned char **, size_t); |
| 1133 char *r_re_alloc (unsigned char **, size_t); | |
| 428 | 1134 void r_alloc_free (unsigned char **); |
| 1135 | |
| 1136 #define BUFFER_ALLOC(data, size) \ | |
| 867 | 1137 ((Ibyte *) r_alloc ((unsigned char **) &data, (size) * sizeof(Ibyte))) |
| 428 | 1138 #define BUFFER_REALLOC(data, size) \ |
| 867 | 1139 ((Ibyte *) r_re_alloc ((unsigned char **) &data, (size) * sizeof(Ibyte))) |
| 428 | 1140 #define BUFFER_FREE(data) r_alloc_free ((unsigned char **) &(data)) |
| 1141 #define R_ALLOC_DECLARE(var,data) r_alloc_declare (&(var), data) | |
| 1142 | |
| 1143 #else /* !REL_ALLOC */ | |
| 1144 | |
| 1145 #define BUFFER_ALLOC(data,size)\ | |
| 867 | 1146 (data = xnew_array (Ibyte, size)) |
| 428 | 1147 #define BUFFER_REALLOC(data,size)\ |
| 867 | 1148 ((Ibyte *) xrealloc (data, (size) * sizeof(Ibyte))) |
| 428 | 1149 /* Avoid excess parentheses, or syntax errors may rear their heads. */ |
|
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1150 #define BUFFER_FREE(data) xfree (data) |
| 428 | 1151 #define R_ALLOC_DECLARE(var,data) |
| 1152 | |
| 1153 #endif /* !REL_ALLOC */ | |
| 1154 | |
| 1155 | |
| 1156 /************************************************************************/ | |
| 1157 /* Case conversion */ | |
| 1158 /************************************************************************/ | |
| 1159 | |
| 1160 /* A "trt" table is a mapping from characters to other characters, | |
| 826 | 1161 typically used to convert between uppercase and lowercase. |
| 428 | 1162 */ |
| 1163 | |
| 1164 /* The _1 macros are named as such because they assume that you have | |
| 1165 already guaranteed that the character values are all in the range | |
| 1166 0 - 255. Bad lossage will happen otherwise. */ | |
| 1167 | |
| 446 | 1168 #define MAKE_TRT_TABLE() Fmake_char_table (Qgeneric) |
| 826 | 1169 DECLARE_INLINE_HEADER ( |
| 867 | 1170 Ichar |
| 1171 TRT_TABLE_OF (Lisp_Object table, Ichar ch) | |
| 826 | 1172 ) |
| 446 | 1173 { |
| 1174 Lisp_Object TRT_char; | |
| 826 | 1175 TRT_char = get_char_table (ch, table); |
| 446 | 1176 if (NILP (TRT_char)) |
| 1177 return ch; | |
| 1178 else | |
| 1179 return XCHAR (TRT_char); | |
| 1180 } | |
| 826 | 1181 #define SET_TRT_TABLE_OF(table, ch1, ch2) \ |
| 1182 Fput_char_table (make_char (ch1), make_char (ch2), table) | |
| 428 | 1183 |
| 826 | 1184 DECLARE_INLINE_HEADER ( |
| 1185 Lisp_Object | |
| 771 | 1186 BUFFER_CASE_TABLE (struct buffer *buf) |
| 826 | 1187 ) |
| 771 | 1188 { |
|
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1189 return buf ? buf->case_table : current_buffer->case_table; |
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1190 /* When buf=0, was Vstandard_case_table, but this sucks. If I set a |
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1191 different case table in this buffer, operations that use a case table |
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1192 by default should use the current one. */ |
| 771 | 1193 } |
| 1194 | |
| 428 | 1195 /* Macros used below. */ |
| 446 | 1196 #define DOWNCASE_TABLE_OF(buf, c) \ |
| 771 | 1197 TRT_TABLE_OF (XCASE_TABLE_DOWNCASE (BUFFER_CASE_TABLE (buf)), c) |
| 446 | 1198 #define UPCASE_TABLE_OF(buf, c) \ |
| 771 | 1199 TRT_TABLE_OF (XCASE_TABLE_UPCASE (BUFFER_CASE_TABLE (buf)), c) |
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1200 #define CANON_TABLE_OF(buf, c) \ |
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1201 TRT_TABLE_OF (XCASE_TABLE_CANON (BUFFER_CASE_TABLE (buf)), c) |
| 428 | 1202 |
| 1203 /* 1 if CH is upper case. */ | |
| 1204 | |
| 826 | 1205 DECLARE_INLINE_HEADER ( |
| 1206 int | |
| 867 | 1207 UPPERCASEP (struct buffer *buf, Ichar ch) |
| 826 | 1208 ) |
| 428 | 1209 { |
| 1210 return DOWNCASE_TABLE_OF (buf, ch) != ch; | |
| 1211 } | |
| 1212 | |
| 1213 /* 1 if CH is lower case. */ | |
| 1214 | |
| 826 | 1215 DECLARE_INLINE_HEADER ( |
| 1216 int | |
| 867 | 1217 LOWERCASEP (struct buffer *buf, Ichar ch) |
| 826 | 1218 ) |
| 428 | 1219 { |
| 1220 return (UPCASE_TABLE_OF (buf, ch) != ch && | |
| 1221 DOWNCASE_TABLE_OF (buf, ch) == ch); | |
| 1222 } | |
| 1223 | |
| 1224 /* 1 if CH is neither upper nor lower case. */ | |
| 1225 | |
| 826 | 1226 DECLARE_INLINE_HEADER ( |
| 1227 int | |
| 867 | 1228 NOCASEP (struct buffer *buf, Ichar ch) |
| 826 | 1229 ) |
| 428 | 1230 { |
| 1231 return UPCASE_TABLE_OF (buf, ch) == ch; | |
| 1232 } | |
| 1233 | |
| 1234 /* Upcase a character, or make no change if that cannot be done. */ | |
| 1235 | |
| 826 | 1236 DECLARE_INLINE_HEADER ( |
| 867 | 1237 Ichar |
| 1238 UPCASE (struct buffer *buf, Ichar ch) | |
| 826 | 1239 ) |
| 428 | 1240 { |
| 1241 return (DOWNCASE_TABLE_OF (buf, ch) == ch) ? UPCASE_TABLE_OF (buf, ch) : ch; | |
| 1242 } | |
| 1243 | |
| 1244 /* Upcase a character known to be not upper case. Unused. */ | |
| 1245 | |
| 1246 #define UPCASE1(buf, ch) UPCASE_TABLE_OF (buf, ch) | |
| 1247 | |
| 1248 /* Downcase a character, or make no change if that cannot be done. */ | |
| 1249 | |
| 1250 #define DOWNCASE(buf, ch) DOWNCASE_TABLE_OF (buf, ch) | |
| 1251 | |
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1252 /* Convert a character to a canonical representation, so that case-independent |
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1253 comparisons will work. */ |
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1254 |
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1255 #define CANONCASE(buf, ch) CANON_TABLE_OF (buf, ch) |
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1256 |
| 440 | 1257 #endif /* INCLUDED_buffer_h_ */ |