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.
6 This file is part of XEmacs.
8 XEmacs is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by the
10 Free Software Foundation; either version 2, or (at your option) any
13 XEmacs is distributed in the hope that it will be useful, but WITHOUT
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with XEmacs; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
23 /* Synched up with: FSF 19.30. */
28 JWZ: separated out bufslots.h, early in Lemacs.
29 Ben Wing: almost completely rewritten for Mule, 19.12.
32 #ifndef INCLUDED_buffer_h_
33 #define INCLUDED_buffer_h_
36 #include "mule-charset.h"
39 /************************************************************************/
41 /* definition of Lisp buffer object */
43 /************************************************************************/
45 /* Note: we keep both Bytind and Bufpos versions of some of the
46 important buffer positions because they are accessed so much.
47 If we didn't do this, we would constantly be invalidating the
48 bufpos<->bytind cache under Mule.
50 Note that under non-Mule, both versions will always be the
51 same so we don't really need to keep track of them. But it
52 simplifies the logic to go ahead and do so all the time and
53 the memory loss is insignificant. */
55 /* Formerly, it didn't much matter what went inside the struct buffer_text
56 and what went outside it. Now it does, with the advent of "indirect
57 buffers" that share text with another buffer. An indirect buffer
58 shares the same *text* as another buffer, but has its own buffer-local
59 variables, its own accessible region, and its own markers and extents.
60 (Due to the nature of markers, it doesn't actually matter much whether
61 we stick them inside or out of the struct buffer_text -- the user won't
62 notice any difference -- but we go ahead and put them outside for
63 consistency and overall saneness of algorithm.)
65 FSFmacs gets away with not maintaining any "children" pointers from
66 a buffer to the indirect buffers that refer to it by putting the
67 markers inside of the struct buffer_text, using markers to keep track
68 of BEGV and ZV in indirect buffers, and relying on the fact that
69 all intervals (text properties and overlays) use markers for their
70 start and end points. We don't do this for extents (markers are
71 inefficient anyway and take up space), so we have to maintain
72 children pointers. This is not terribly hard, though, and the
73 code to maintain this is just like the code already present in
74 extent-parent and extent-children.
79 Bufbyte *beg; /* Actual address of buffer contents. */
80 Bytind gpt; /* Index of gap in buffer. */
81 Bytind z; /* Index of end of buffer. */
82 Bufpos bufz; /* Equivalent as a Bufpos. */
83 int gap_size; /* Size of buffer's gap */
84 int end_gap_size; /* Size of buffer's end gap */
85 long modiff; /* This counts buffer-modification events
86 for this buffer. It is incremented for
87 each such event, and never otherwise
89 long save_modiff; /* Previous value of modiff, as of last
90 time buffer visited or saved a file. */
93 /* We keep track of a "known" region for very fast access.
94 This information is text-only so it goes here. */
95 Bufpos mule_bufmin, mule_bufmax;
96 Bytind mule_bytmin, mule_bytmax;
97 int mule_shifter, mule_three_p;
99 /* And we also cache 16 positions for fairly fast access near those
101 Bufpos mule_bufpos_cache[16];
102 Bytind mule_bytind_cache[16];
105 /* Similar to the above, we keep track of positions for which line
106 number has last been calculated. See line-number.c. */
107 Lisp_Object line_number_cache;
109 /* Change data that goes with the text. */
110 struct buffer_text_change_data *changes;
116 struct lcrecord_header header;
118 /* This structure holds the coordinates of the buffer contents
119 in ordinary buffers. In indirect buffers, this is not used. */
120 struct buffer_text own_text;
122 /* This points to the `struct buffer_text' that is used for this buffer.
123 In an ordinary buffer, this is the own_text field above.
124 In an indirect buffer, this is the own_text field of another buffer. */
125 struct buffer_text *text;
127 Bytind pt; /* Position of point in buffer. */
128 Bufpos bufpt; /* Equivalent as a Bufpos. */
129 Bytind begv; /* Index of beginning of accessible range. */
130 Bufpos bufbegv; /* Equivalent as a Bufpos. */
131 Bytind zv; /* Index of end of accessible range. */
132 Bufpos bufzv; /* Equivalent as a Bufpos. */
134 int face_change; /* This is set when a change in how the text should
135 be displayed (e.g., font, color) is made. */
137 /* change data indicating what portion of the text has changed
138 since the last time this was reset. Used by redisplay.
139 Logically we should keep this with the text structure, but
140 redisplay resets it for each buffer individually and we don't
141 want interference between an indirect buffer and its base
143 struct each_buffer_change_data *changes;
145 #ifdef REGION_CACHE_NEEDS_WORK
146 /* If the long line scan cache is enabled (i.e. the buffer-local
147 variable cache-long-line-scans is non-nil), newline_cache
148 points to the newline cache, and width_run_cache points to the
151 The newline cache records which stretches of the buffer are
152 known *not* to contain newlines, so that they can be skipped
153 quickly when we search for newlines.
155 The width run cache records which stretches of the buffer are
156 known to contain characters whose widths are all the same. If
157 the width run cache maps a character to a value > 0, that value
158 is the character's width; if it maps a character to zero, we
159 don't know what its width is. This allows compute_motion to
160 process such regions very quickly, using algebra instead of
161 inspecting each character. See also width_table, below. */
162 struct region_cache *newline_cache;
163 struct region_cache *width_run_cache;
164 #endif /* REGION_CACHE_NEEDS_WORK */
166 /* The markers that refer to this buffer. This is actually a single
167 marker -- successive elements in its marker `chain' are the other
168 markers referring to this buffer */
169 Lisp_Marker *markers;
171 /* The buffer's extent info. This is its own type, an extent-info
172 object (done this way for ease in marking / finalizing). */
173 Lisp_Object extent_info;
175 /* ----------------------------------------------------------------- */
176 /* All the stuff above this line is the responsibility of insdel.c,
177 with some help from marker.c and extents.c.
178 All the stuff below this line is the responsibility of buffer.c. */
180 /* In an indirect buffer, this points to the base buffer.
181 In an ordinary buffer, it is 0.
182 We DO mark through this slot. */
183 struct buffer *base_buffer;
185 /* List of indirect buffers whose base is this buffer.
186 If we are an indirect buffer, this will be nil.
187 Do NOT mark through this. */
188 Lisp_Object indirect_children;
190 /* Flags saying which DEFVAR_PER_BUFFER variables
191 are local to this buffer. */
194 /* Set to the modtime of the visited file when read or written.
195 -1 means visited file was nonexistent.
196 0 means visited file modtime unknown; in no case complain
197 about any mismatch on next save attempt. */
200 /* the value of text->modiff at the last auto-save. */
201 long auto_save_modified;
203 /* The time at which we detected a failure to auto-save,
204 Or -1 if we didn't have a failure. */
205 int auto_save_failure_time;
207 /* Position in buffer at which display started
208 the last time this buffer was displayed. */
209 int last_window_start;
211 /* Everything from here down must be a Lisp_Object */
213 #define MARKED_SLOT(x) Lisp_Object x
214 #include "bufslots.h"
218 DECLARE_LRECORD (buffer, struct buffer);
219 #define XBUFFER(x) XRECORD (x, buffer, struct buffer)
220 #define XSETBUFFER(x, p) XSETRECORD (x, p, buffer)
221 #define BUFFERP(x) RECORDP (x, buffer)
222 #define CHECK_BUFFER(x) CHECK_RECORD (x, buffer)
223 #define CONCHECK_BUFFER(x) CONCHECK_RECORD (x, buffer)
225 #define BUFFER_LIVE_P(b) (!NILP ((b)->name))
227 #define CHECK_LIVE_BUFFER(x) do { \
229 if (!BUFFER_LIVE_P (XBUFFER (x))) \
230 dead_wrong_type_argument (Qbuffer_live_p, (x)); \
233 #define CONCHECK_LIVE_BUFFER(x) do { \
234 CONCHECK_BUFFER (x); \
235 if (!BUFFER_LIVE_P (XBUFFER (x))) \
236 x = wrong_type_argument (Qbuffer_live_p, (x)); \
240 #define BUFFER_BASE_BUFFER(b) ((b)->base_buffer ? (b)->base_buffer : (b))
242 /* Map over buffers sharing the same text as MPS_BUF. MPS_BUFVAR is a
243 variable that gets the buffer values (beginning with the base
244 buffer, then the children), and MPS_BUFCONS should be a temporary
245 Lisp_Object variable. */
246 #define MAP_INDIRECT_BUFFERS(mps_buf, mps_bufvar, mps_bufcons) \
247 for (mps_bufcons = Qunbound, \
248 mps_bufvar = BUFFER_BASE_BUFFER (mps_buf); \
249 UNBOUNDP (mps_bufcons) ? \
250 (mps_bufcons = mps_bufvar->indirect_children, \
252 : (!NILP (mps_bufcons) \
253 && (mps_bufvar = XBUFFER (XCAR (mps_bufcons)), 1) \
254 && (mps_bufcons = XCDR (mps_bufcons), 1)); \
259 /************************************************************************/
261 /* working with raw internal-format data */
263 /************************************************************************/
265 /* NOTE: In all the following macros, we follow these rules concerning
266 multiple evaluation of the arguments:
268 1) Anything that's an lvalue can be evaluated more than once.
269 2) Anything that's a Lisp Object can be evaluated more than once.
270 This should probably be changed, but this follows the way
271 that all the macros in lisp.h do things.
272 3) 'struct buffer *' arguments can be evaluated more than once.
273 4) Nothing else can be evaluated more than once. Use inline
274 functions, if necessary, to prevent multiple evaluation.
275 5) An exception to (4) is that there are some macros below that
276 may evaluate their arguments more than once. They are all
277 denoted with the word "unsafe" in their name and are generally
278 meant to be called only by other macros that have already
279 stored the calling values in temporary variables.
282 Use the following functions/macros on contiguous strings of data.
283 If the text you're operating on is known to come from a buffer, use
284 the buffer-level functions below -- they know about the gap and may
288 (A) For working with charptr's (pointers to internally-formatted text):
289 -----------------------------------------------------------------------
291 VALID_CHARPTR_P (ptr):
292 Given a charptr, does it point to the beginning of a character?
294 ASSERT_VALID_CHARPTR (ptr):
295 If error-checking is enabled, assert that the given charptr
296 points to the beginning of a character. Otherwise, do nothing.
299 Given a charptr (assumed to point at the beginning of a character),
300 modify that pointer so it points to the beginning of the next
304 Given a charptr (assumed to point at the beginning of a
305 character or at the very end of the text), modify that pointer
306 so it points to the beginning of the previous character.
308 VALIDATE_CHARPTR_BACKWARD (ptr):
309 Make sure that PTR is pointing to the beginning of a character.
310 If not, back up until this is the case. Note that there are not
311 too many places where it is legitimate to do this sort of thing.
312 It's an error if you're passed an "invalid" char * pointer.
313 NOTE: PTR *must* be pointing to a valid part of the string (i.e.
314 not the very end, unless the string is zero-terminated or
315 something) in order for this function to not cause crashes.
317 VALIDATE_CHARPTR_FORWARD (ptr):
318 Make sure that PTR is pointing to the beginning of a character.
319 If not, move forward until this is the case. Note that there
320 are not too many places where it is legitimate to do this sort
321 of thing. It's an error if you're passed an "invalid" char *
325 (B) For working with the length (in bytes and characters) of a
326 section of internally-formatted text:
327 --------------------------------------------------------------
329 bytecount_to_charcount (ptr, nbi):
330 Given a pointer to a text string and a length in bytes,
331 return the equivalent length in characters.
333 charcount_to_bytecount (ptr, nch):
334 Given a pointer to a text string and a length in characters,
335 return the equivalent length in bytes.
337 charptr_n_addr (ptr, n):
338 Return a pointer to the beginning of the character offset N
339 (in characters) from PTR.
342 (C) For retrieving or changing the character pointed to by a charptr:
343 ---------------------------------------------------------------------
345 charptr_emchar (ptr):
346 Retrieve the character pointed to by PTR as an Emchar.
348 charptr_emchar_n (ptr, n):
349 Retrieve the character at offset N (in characters) from PTR,
352 set_charptr_emchar (ptr, ch):
353 Store the character CH (an Emchar) as internally-formatted
354 text starting at PTR. Return the number of bytes stored.
356 charptr_copy_char (ptr, ptr2):
357 Retrieve the character pointed to by PTR and store it as
358 internally-formatted text in PTR2.
361 (D) For working with Emchars:
362 -----------------------------
364 [Note that there are other functions/macros for working with Emchars
365 in mule-charset.h, for retrieving the charset of an Emchar
366 and such. These are only valid when MULE is defined.]
369 Return whether the given Emchar is valid.
372 Return whether the given Lisp_Object is a character.
374 CHECK_CHAR_COERCE_INT (ch):
375 Signal an error if CH is not a valid character or integer Lisp_Object.
376 If CH is an integer Lisp_Object, convert it to a character Lisp_Object,
377 but merely by repackaging, without performing tests for char validity.
380 Maximum number of buffer bytes per Emacs character.
385 /* ---------------------------------------------------------------------- */
386 /* (A) For working with charptr's (pointers to internally-formatted text) */
387 /* ---------------------------------------------------------------------- */
390 # define VALID_CHARPTR_P(ptr) BUFBYTE_FIRST_BYTE_P (* (unsigned char *) ptr)
392 # define VALID_CHARPTR_P(ptr) 1
395 #ifdef ERROR_CHECK_BUFPOS
396 # define ASSERT_VALID_CHARPTR(ptr) assert (VALID_CHARPTR_P (ptr))
398 # define ASSERT_VALID_CHARPTR(ptr)
401 /* Note that INC_CHARPTR() and DEC_CHARPTR() have to be written in
402 completely separate ways. INC_CHARPTR() cannot use the DEC_CHARPTR()
403 trick of looking for a valid first byte because it might run off
404 the end of the string. DEC_CHARPTR() can't use the INC_CHARPTR()
405 method because it doesn't have easy access to the first byte of
406 the character it's moving over. */
408 #define REAL_INC_CHARPTR(ptr) \
409 ((void) ((ptr) += REP_BYTES_BY_FIRST_BYTE (* (unsigned char *) (ptr))))
411 #define REAL_INC_CHARBYTIND(ptr, pos) \
412 (pos += REP_BYTES_BY_FIRST_BYTE (* (unsigned char *) (ptr)))
414 #define REAL_DEC_CHARPTR(ptr) do { \
416 } while (!VALID_CHARPTR_P (ptr))
418 #ifdef ERROR_CHECK_BUFPOS
419 #define INC_CHARPTR(ptr) do { \
420 ASSERT_VALID_CHARPTR (ptr); \
421 REAL_INC_CHARPTR (ptr); \
424 #define INC_CHARBYTIND(ptr, pos) do { \
425 ASSERT_VALID_CHARPTR (ptr); \
426 REAL_INC_CHARBYTIND (ptr, pos); \
429 #define DEC_CHARPTR(ptr) do { \
430 const Bufbyte *dc_ptr1 = (ptr); \
431 const Bufbyte *dc_ptr2 = dc_ptr1; \
432 REAL_DEC_CHARPTR (dc_ptr2); \
433 assert (dc_ptr1 - dc_ptr2 == \
434 REP_BYTES_BY_FIRST_BYTE (*dc_ptr2)); \
435 (ptr) = (Bufbyte *) dc_ptr2; \
438 #else /* ! ERROR_CHECK_BUFPOS */
439 #define INC_CHARBYTIND(ptr, pos) REAL_INC_CHARBYTIND (ptr, pos)
440 #define INC_CHARPTR(ptr) REAL_INC_CHARPTR (ptr)
441 #define DEC_CHARPTR(ptr) REAL_DEC_CHARPTR (ptr)
442 #endif /* ! ERROR_CHECK_BUFPOS */
446 #define VALIDATE_CHARPTR_BACKWARD(ptr) do { \
447 while (!VALID_CHARPTR_P (ptr)) ptr--; \
450 /* This needs to be trickier to avoid the possibility of running off
451 the end of the string. */
453 #define VALIDATE_CHARPTR_FORWARD(ptr) do { \
454 Bufbyte *vcf_ptr = (ptr); \
455 VALIDATE_CHARPTR_BACKWARD (vcf_ptr); \
456 if (vcf_ptr != (ptr)) \
464 #define VALIDATE_CHARPTR_BACKWARD(ptr)
465 #define VALIDATE_CHARPTR_FORWARD(ptr)
466 #endif /* not MULE */
468 /* -------------------------------------------------------------- */
469 /* (B) For working with the length (in bytes and characters) of a */
470 /* section of internally-formatted text */
471 /* -------------------------------------------------------------- */
473 INLINE_HEADER const Bufbyte *
474 charptr_n_addr (const Bufbyte *ptr, Charcount offset);
475 INLINE_HEADER const Bufbyte *
476 charptr_n_addr (const Bufbyte *ptr, Charcount offset)
478 return ptr + charcount_to_bytecount (ptr, offset);
481 /* -------------------------------------------------------------------- */
482 /* (C) For retrieving or changing the character pointed to by a charptr */
483 /* -------------------------------------------------------------------- */
485 #define simple_charptr_emchar(ptr) ((Emchar) (ptr)[0])
486 #define simple_set_charptr_emchar(ptr, x) ((ptr)[0] = (Bufbyte) (x), 1)
487 #define simple_charptr_copy_char(ptr, ptr2) ((ptr2)[0] = *(ptr), 1)
491 Emchar non_ascii_charptr_emchar (const Bufbyte *ptr);
492 Bytecount non_ascii_set_charptr_emchar (Bufbyte *ptr, Emchar c);
493 Bytecount non_ascii_charptr_copy_char (const Bufbyte *src, Bufbyte *dst);
495 INLINE_HEADER Emchar charptr_emchar (const Bufbyte *ptr);
497 charptr_emchar (const Bufbyte *ptr)
499 return BYTE_ASCII_P (*ptr) ?
500 simple_charptr_emchar (ptr) :
501 non_ascii_charptr_emchar (ptr);
504 INLINE_HEADER Bytecount set_charptr_emchar (Bufbyte *ptr, Emchar x);
505 INLINE_HEADER Bytecount
506 set_charptr_emchar (Bufbyte *ptr, Emchar x)
508 return !CHAR_MULTIBYTE_P (x) ?
509 simple_set_charptr_emchar (ptr, x) :
510 non_ascii_set_charptr_emchar (ptr, x);
513 /* Copy the character pointed to by SRC into DST.
514 Return the number of bytes copied. */
515 INLINE_HEADER Bytecount
516 charptr_copy_char (const Bufbyte *src, Bufbyte *dst);
517 INLINE_HEADER Bytecount
518 charptr_copy_char (const Bufbyte *src, Bufbyte *dst)
520 return BYTE_ASCII_P (*src) ?
521 simple_charptr_copy_char (src, dst) :
522 non_ascii_charptr_copy_char (src, dst);
527 # define charptr_emchar(ptr) simple_charptr_emchar (ptr)
528 # define set_charptr_emchar(ptr, x) simple_set_charptr_emchar (ptr, x)
529 # define charptr_copy_char(ptr, ptr2) simple_charptr_copy_char (ptr, ptr2)
531 #endif /* not MULE */
533 #define charptr_emchar_n(ptr, offset) \
534 charptr_emchar (charptr_n_addr (ptr, offset))
537 /* ---------------------------- */
538 /* (D) For working with Emchars */
539 /* ---------------------------- */
543 int non_ascii_valid_char_p (Emchar ch);
545 INLINE_HEADER int valid_char_p (Emchar ch);
547 valid_char_p (Emchar ch)
549 return ((unsigned int) (ch) <= 0xff) || non_ascii_valid_char_p (ch);
554 #define valid_char_p(ch) ((unsigned int) (ch) <= 0xff)
556 #endif /* not MULE */
558 #define CHAR_INTP(x) (INTP (x) && valid_char_p (XINT (x)))
560 #define CHAR_OR_CHAR_INTP(x) (CHARP (x) || CHAR_INTP (x))
562 INLINE_HEADER Emchar XCHAR_OR_CHAR_INT (Lisp_Object obj);
564 XCHAR_OR_CHAR_INT (Lisp_Object obj)
566 return CHARP (obj) ? XCHAR (obj) : XINT (obj);
569 #define CHECK_CHAR_COERCE_INT(x) do { \
572 else if (CHAR_INTP (x)) \
573 x = make_char (XINT (x)); \
575 x = wrong_type_argument (Qcharacterp, x); \
579 # define MAX_EMCHAR_LEN 4
581 # define MAX_EMCHAR_LEN 1
585 /*----------------------------------------------------------------------*/
586 /* Accessor macros for important positions in a buffer */
587 /*----------------------------------------------------------------------*/
589 /* We put them here because some stuff below wants them before the
590 place where we would normally put them. */
592 /* None of these are lvalues. Use the settor macros below to change
595 /* Beginning of buffer. */
596 #define BI_BUF_BEG(buf) ((Bytind) 1)
597 #define BUF_BEG(buf) ((Bufpos) 1)
599 /* Beginning of accessible range of buffer. */
600 #define BI_BUF_BEGV(buf) ((buf)->begv + 0)
601 #define BUF_BEGV(buf) ((buf)->bufbegv + 0)
603 /* End of accessible range of buffer. */
604 #define BI_BUF_ZV(buf) ((buf)->zv + 0)
605 #define BUF_ZV(buf) ((buf)->bufzv + 0)
608 #define BI_BUF_Z(buf) ((buf)->text->z + 0)
609 #define BUF_Z(buf) ((buf)->text->bufz + 0)
612 #define BI_BUF_PT(buf) ((buf)->pt + 0)
613 #define BUF_PT(buf) ((buf)->bufpt + 0)
615 /*----------------------------------------------------------------------*/
616 /* Converting between positions and addresses */
617 /*----------------------------------------------------------------------*/
619 /* Convert the address of a byte in the buffer into a position. */
620 INLINE_HEADER Bytind BI_BUF_PTR_BYTE_POS (struct buffer *buf, Bufbyte *ptr);
622 BI_BUF_PTR_BYTE_POS (struct buffer *buf, Bufbyte *ptr)
624 return (ptr - buf->text->beg + 1
625 - ((ptr - buf->text->beg + 1) > buf->text->gpt
626 ? buf->text->gap_size : 0));
629 #define BUF_PTR_BYTE_POS(buf, ptr) \
630 bytind_to_bufpos (buf, BI_BUF_PTR_BYTE_POS (buf, ptr))
632 /* Address of byte at position POS in buffer. */
633 INLINE_HEADER Bufbyte * BI_BUF_BYTE_ADDRESS (struct buffer *buf, Bytind pos);
634 INLINE_HEADER Bufbyte *
635 BI_BUF_BYTE_ADDRESS (struct buffer *buf, Bytind pos)
637 return (buf->text->beg +
638 ((pos >= buf->text->gpt ? (pos + buf->text->gap_size) : pos)
642 #define BUF_BYTE_ADDRESS(buf, pos) \
643 BI_BUF_BYTE_ADDRESS (buf, bufpos_to_bytind (buf, pos))
645 /* Address of byte before position POS in buffer. */
646 INLINE_HEADER Bufbyte * BI_BUF_BYTE_ADDRESS_BEFORE (struct buffer *buf, Bytind pos);
647 INLINE_HEADER Bufbyte *
648 BI_BUF_BYTE_ADDRESS_BEFORE (struct buffer *buf, Bytind pos)
650 return (buf->text->beg +
651 ((pos > buf->text->gpt ? (pos + buf->text->gap_size) : pos)
655 #define BUF_BYTE_ADDRESS_BEFORE(buf, pos) \
656 BI_BUF_BYTE_ADDRESS_BEFORE (buf, bufpos_to_bytind (buf, pos))
658 /*----------------------------------------------------------------------*/
659 /* Converting between byte indices and memory indices */
660 /*----------------------------------------------------------------------*/
662 INLINE_HEADER int valid_memind_p (struct buffer *buf, Memind x);
664 valid_memind_p (struct buffer *buf, Memind x)
666 return ((x >= 1 && x <= (Memind) buf->text->gpt) ||
667 (x > (Memind) (buf->text->gpt + buf->text->gap_size) &&
668 x <= (Memind) (buf->text->z + buf->text->gap_size)));
671 INLINE_HEADER Memind bytind_to_memind (struct buffer *buf, Bytind x);
673 bytind_to_memind (struct buffer *buf, Bytind x)
675 return (Memind) ((x > buf->text->gpt) ? (x + buf->text->gap_size) : x);
679 INLINE_HEADER Bytind memind_to_bytind (struct buffer *buf, Memind x);
681 memind_to_bytind (struct buffer *buf, Memind x)
683 #ifdef ERROR_CHECK_BUFPOS
684 assert (valid_memind_p (buf, x));
686 return (Bytind) ((x > (Memind) buf->text->gpt) ?
687 x - buf->text->gap_size :
691 #define memind_to_bufpos(buf, x) \
692 bytind_to_bufpos (buf, memind_to_bytind (buf, x))
693 #define bufpos_to_memind(buf, x) \
694 bytind_to_memind (buf, bufpos_to_bytind (buf, x))
696 /* These macros generalize many standard buffer-position functions to
697 either a buffer or a string. */
699 /* Converting between Meminds and Bytinds, for a buffer-or-string.
700 For strings, this is a no-op. For buffers, this resolves
701 to the standard memind<->bytind converters. */
703 #define buffer_or_string_bytind_to_memind(obj, ind) \
704 (BUFFERP (obj) ? bytind_to_memind (XBUFFER (obj), ind) : (Memind) ind)
706 #define buffer_or_string_memind_to_bytind(obj, ind) \
707 (BUFFERP (obj) ? memind_to_bytind (XBUFFER (obj), ind) : (Bytind) ind)
709 /* Converting between Bufpos's and Bytinds, for a buffer-or-string.
710 For strings, this maps to the bytecount<->charcount converters. */
712 #define buffer_or_string_bufpos_to_bytind(obj, pos) \
713 (BUFFERP (obj) ? bufpos_to_bytind (XBUFFER (obj), pos) : \
714 (Bytind) charcount_to_bytecount (XSTRING_DATA (obj), pos))
716 #define buffer_or_string_bytind_to_bufpos(obj, ind) \
717 (BUFFERP (obj) ? bytind_to_bufpos (XBUFFER (obj), ind) : \
718 (Bufpos) bytecount_to_charcount (XSTRING_DATA (obj), ind))
720 /* Similar for Bufpos's and Meminds. */
722 #define buffer_or_string_bufpos_to_memind(obj, pos) \
723 (BUFFERP (obj) ? bufpos_to_memind (XBUFFER (obj), pos) : \
724 (Memind) charcount_to_bytecount (XSTRING_DATA (obj), pos))
726 #define buffer_or_string_memind_to_bufpos(obj, ind) \
727 (BUFFERP (obj) ? memind_to_bufpos (XBUFFER (obj), ind) : \
728 (Bufpos) bytecount_to_charcount (XSTRING_DATA (obj), ind))
730 /************************************************************************/
732 /* working with buffer-level data */
734 /************************************************************************/
738 (A) Working with byte indices:
739 ------------------------------
741 VALID_BYTIND_P(buf, bi):
742 Given a byte index, does it point to the beginning of a character?
744 ASSERT_VALID_BYTIND_UNSAFE(buf, bi):
745 If error-checking is enabled, assert that the given byte index
746 is within range and points to the beginning of a character
747 or to the end of the buffer. Otherwise, do nothing.
749 ASSERT_VALID_BYTIND_BACKWARD_UNSAFE(buf, bi):
750 If error-checking is enabled, assert that the given byte index
751 is within range and satisfies ASSERT_VALID_BYTIND() and also
752 does not refer to the beginning of the buffer. (i.e. movement
753 backwards is OK.) Otherwise, do nothing.
755 ASSERT_VALID_BYTIND_FORWARD_UNSAFE(buf, bi):
756 If error-checking is enabled, assert that the given byte index
757 is within range and satisfies ASSERT_VALID_BYTIND() and also
758 does not refer to the end of the buffer. (i.e. movement
759 forwards is OK.) Otherwise, do nothing.
761 VALIDATE_BYTIND_BACKWARD(buf, bi):
762 Make sure that the given byte index is pointing to the beginning
763 of a character. If not, back up until this is the case. Note
764 that there are not too many places where it is legitimate to do
765 this sort of thing. It's an error if you're passed an "invalid"
768 VALIDATE_BYTIND_FORWARD(buf, bi):
769 Make sure that the given byte index is pointing to the beginning
770 of a character. If not, move forward until this is the case.
771 Note that there are not too many places where it is legitimate
772 to do this sort of thing. It's an error if you're passed an
773 "invalid" byte index.
776 Given a byte index (assumed to point at the beginning of a
777 character), modify that value so it points to the beginning
778 of the next character.
781 Given a byte index (assumed to point at the beginning of a
782 character), modify that value so it points to the beginning
783 of the previous character. Unlike for DEC_CHARPTR(), we can
784 do all the assert()s because there are sentinels at the
785 beginning of the gap and the end of the buffer.
788 A constant representing an invalid Bytind. Valid Bytinds
789 can never have this value.
792 (B) Converting between Bufpos's and Bytinds:
793 --------------------------------------------
795 bufpos_to_bytind(buf, bu):
796 Given a Bufpos, return the equivalent Bytind.
798 bytind_to_bufpos(buf, bi):
799 Given a Bytind, return the equivalent Bufpos.
801 make_bufpos(buf, bi):
802 Given a Bytind, return the equivalent Bufpos as a Lisp Object.
806 /*----------------------------------------------------------------------*/
807 /* working with byte indices */
808 /*----------------------------------------------------------------------*/
811 # define VALID_BYTIND_P(buf, x) \
812 BUFBYTE_FIRST_BYTE_P (*BI_BUF_BYTE_ADDRESS (buf, x))
814 # define VALID_BYTIND_P(buf, x) 1
817 #ifdef ERROR_CHECK_BUFPOS
819 # define ASSERT_VALID_BYTIND_UNSAFE(buf, x) do { \
820 assert (BUFFER_LIVE_P (buf)); \
821 assert ((x) >= BI_BUF_BEG (buf) && x <= BI_BUF_Z (buf)); \
822 assert (VALID_BYTIND_P (buf, x)); \
824 # define ASSERT_VALID_BYTIND_BACKWARD_UNSAFE(buf, x) do { \
825 assert (BUFFER_LIVE_P (buf)); \
826 assert ((x) > BI_BUF_BEG (buf) && x <= BI_BUF_Z (buf)); \
827 assert (VALID_BYTIND_P (buf, x)); \
829 # define ASSERT_VALID_BYTIND_FORWARD_UNSAFE(buf, x) do { \
830 assert (BUFFER_LIVE_P (buf)); \
831 assert ((x) >= BI_BUF_BEG (buf) && x < BI_BUF_Z (buf)); \
832 assert (VALID_BYTIND_P (buf, x)); \
835 #else /* not ERROR_CHECK_BUFPOS */
836 # define ASSERT_VALID_BYTIND_UNSAFE(buf, x)
837 # define ASSERT_VALID_BYTIND_BACKWARD_UNSAFE(buf, x)
838 # define ASSERT_VALID_BYTIND_FORWARD_UNSAFE(buf, x)
840 #endif /* not ERROR_CHECK_BUFPOS */
842 /* Note that, although the Mule version will work fine for non-Mule
843 as well (it should reduce down to nothing), we provide a separate
844 version to avoid compilation warnings and possible non-optimal
845 results with stupid compilers. */
848 # define VALIDATE_BYTIND_BACKWARD(buf, x) do { \
849 Bufbyte *VBB_ptr = BI_BUF_BYTE_ADDRESS (buf, x); \
850 while (!BUFBYTE_FIRST_BYTE_P (*VBB_ptr)) \
854 # define VALIDATE_BYTIND_BACKWARD(buf, x)
857 /* Note that, although the Mule version will work fine for non-Mule
858 as well (it should reduce down to nothing), we provide a separate
859 version to avoid compilation warnings and possible non-optimal
860 results with stupid compilers. */
863 # define VALIDATE_BYTIND_FORWARD(buf, x) do { \
864 Bufbyte *VBF_ptr = BI_BUF_BYTE_ADDRESS (buf, x); \
865 while (!BUFBYTE_FIRST_BYTE_P (*VBF_ptr)) \
869 # define VALIDATE_BYTIND_FORWARD(buf, x)
872 /* Note that in the simplest case (no MULE, no ERROR_CHECK_BUFPOS),
873 this crap reduces down to simply (x)++. */
875 #define INC_BYTIND(buf, x) do \
877 ASSERT_VALID_BYTIND_FORWARD_UNSAFE (buf, x); \
878 /* Note that we do the increment first to \
879 make sure that the pointer in \
880 VALIDATE_BYTIND_FORWARD() ends up on \
881 the correct side of the gap */ \
883 VALIDATE_BYTIND_FORWARD (buf, x); \
886 /* Note that in the simplest case (no MULE, no ERROR_CHECK_BUFPOS),
887 this crap reduces down to simply (x)--. */
889 #define DEC_BYTIND(buf, x) do \
891 ASSERT_VALID_BYTIND_BACKWARD_UNSAFE (buf, x); \
892 /* Note that we do the decrement first to \
893 make sure that the pointer in \
894 VALIDATE_BYTIND_BACKWARD() ends up on \
895 the correct side of the gap */ \
897 VALIDATE_BYTIND_BACKWARD (buf, x); \
900 INLINE_HEADER Bytind prev_bytind (struct buffer *buf, Bytind x);
902 prev_bytind (struct buffer *buf, Bytind x)
908 INLINE_HEADER Bytind next_bytind (struct buffer *buf, Bytind x);
910 next_bytind (struct buffer *buf, Bytind x)
916 #define BYTIND_INVALID ((Bytind) -1)
918 /*----------------------------------------------------------------------*/
919 /* Converting between buffer positions and byte indices */
920 /*----------------------------------------------------------------------*/
924 Bytind bufpos_to_bytind_func (struct buffer *buf, Bufpos x);
925 Bufpos bytind_to_bufpos_func (struct buffer *buf, Bytind x);
927 /* The basic algorithm we use is to keep track of a known region of
928 characters in each buffer, all of which are of the same width. We
929 keep track of the boundaries of the region in both Bufpos and
930 Bytind coordinates and also keep track of the char width, which
931 is 1 - 4 bytes. If the position we're translating is not in
932 the known region, then we invoke a function to update the known
933 region to surround the position in question. This assumes
934 locality of reference, which is usually the case.
936 Note that the function to update the known region can be simple
937 or complicated depending on how much information we cache.
938 For the moment, we don't cache any information, and just move
939 linearly forward or back from the known region, with a few
940 shortcuts to catch all-ASCII buffers. (Note that this will
941 thrash with bad locality of reference.) A smarter method would
942 be to keep some sort of pseudo-extent layer over the buffer;
943 maybe keep track of the bufpos/bytind correspondence at the
944 beginning of each line, which would allow us to do a binary
945 search over the pseudo-extents to narrow things down to the
946 correct line, at which point you could use a linear movement
947 method. This would also mesh well with efficiently
948 implementing a line-numbering scheme.
950 Note also that we have to multiply or divide by the char width
951 in order to convert the positions. We do some tricks to avoid
952 ever actually having to do a multiply or divide, because that
953 is typically an expensive operation (esp. divide). Multiplying
954 or dividing by 1, 2, or 4 can be implemented simply as a
955 shift left or shift right, and we keep track of a shifter value
956 (0, 1, or 2) indicating how much to shift. Multiplying by 3
957 can be implemented by doubling and then adding the original
958 value. Dividing by 3, alas, cannot be implemented in any
959 simple shift/subtract method, as far as I know; so we just
960 do a table lookup. For simplicity, we use a table of size
961 128K, which indexes the "divide-by-3" values for the first
962 64K non-negative numbers. (Note that we can increase the
963 size up to 384K, i.e. indexing the first 192K non-negative
964 numbers, while still using shorts in the array.) This also
965 means that the size of the known region can be at most
966 64K for width-three characters.
969 extern short three_to_one_table[];
971 INLINE_HEADER int real_bufpos_to_bytind (struct buffer *buf, Bufpos x);
973 real_bufpos_to_bytind (struct buffer *buf, Bufpos x)
975 if (x >= buf->text->mule_bufmin && x <= buf->text->mule_bufmax)
976 return (buf->text->mule_bytmin +
977 ((x - buf->text->mule_bufmin) << buf->text->mule_shifter) +
978 (buf->text->mule_three_p ? (x - buf->text->mule_bufmin) : 0));
980 return bufpos_to_bytind_func (buf, x);
983 INLINE_HEADER int real_bytind_to_bufpos (struct buffer *buf, Bytind x);
985 real_bytind_to_bufpos (struct buffer *buf, Bytind x)
987 if (x >= buf->text->mule_bytmin && x <= buf->text->mule_bytmax)
988 return (buf->text->mule_bufmin +
989 ((buf->text->mule_three_p
990 ? three_to_one_table[x - buf->text->mule_bytmin]
991 : (x - buf->text->mule_bytmin) >> buf->text->mule_shifter)));
993 return bytind_to_bufpos_func (buf, x);
998 # define real_bufpos_to_bytind(buf, x) ((Bytind) x)
999 # define real_bytind_to_bufpos(buf, x) ((Bufpos) x)
1001 #endif /* not MULE */
1003 #ifdef ERROR_CHECK_BUFPOS
1005 Bytind bufpos_to_bytind (struct buffer *buf, Bufpos x);
1006 Bufpos bytind_to_bufpos (struct buffer *buf, Bytind x);
1008 #else /* not ERROR_CHECK_BUFPOS */
1010 #define bufpos_to_bytind real_bufpos_to_bytind
1011 #define bytind_to_bufpos real_bytind_to_bufpos
1013 #endif /* not ERROR_CHECK_BUFPOS */
1015 #define make_bufpos(buf, ind) make_int (bytind_to_bufpos (buf, ind))
1017 /*----------------------------------------------------------------------*/
1018 /* Converting between buffer bytes and Emacs characters */
1019 /*----------------------------------------------------------------------*/
1021 /* The character at position POS in buffer. */
1022 #define BI_BUF_FETCH_CHAR(buf, pos) \
1023 charptr_emchar (BI_BUF_BYTE_ADDRESS (buf, pos))
1024 #define BUF_FETCH_CHAR(buf, pos) \
1025 BI_BUF_FETCH_CHAR (buf, bufpos_to_bytind (buf, pos))
1027 /* The character at position POS in buffer, as a string. This is
1028 equivalent to set_charptr_emchar (str, BUF_FETCH_CHAR (buf, pos))
1029 but is faster for Mule. */
1031 # define BI_BUF_CHARPTR_COPY_CHAR(buf, pos, str) \
1032 charptr_copy_char (BI_BUF_BYTE_ADDRESS (buf, pos), str)
1033 #define BUF_CHARPTR_COPY_CHAR(buf, pos, str) \
1034 BI_BUF_CHARPTR_COPY_CHAR (buf, bufpos_to_bytind (buf, pos), str)
1037 /************************************************************************/
1039 /* Converting between internal and external format */
1041 /************************************************************************/
1043 All client code should use only the two macros
1045 TO_EXTERNAL_FORMAT (source_type, source, sink_type, sink, coding_system)
1046 TO_INTERNAL_FORMAT (source_type, source, sink_type, sink, coding_system)
1050 TO_EXTERNAL_FORMAT (DATA, (ptr, len),
1051 LISP_BUFFER, buffer,
1054 The source or sink can be specified in one of these ways:
1056 DATA, (ptr, len), // input data is a fixed buffer of size len
1057 ALLOCA, (ptr, len), // output data is in a alloca()ed buffer of size len
1058 MALLOC, (ptr, len), // output data is in a malloc()ed buffer of size len
1059 C_STRING_ALLOCA, ptr, // equivalent to ALLOCA (ptr, len_ignored) on output
1060 C_STRING_MALLOC, ptr, // equivalent to MALLOC (ptr, len_ignored) on output
1061 C_STRING, ptr, // equivalent to DATA, (ptr, strlen (ptr) + 1) on input
1062 LISP_STRING, string, // input or output is a Lisp_Object of type string
1063 LISP_BUFFER, buffer, // output is written to (point) in lisp buffer
1064 LISP_LSTREAM, lstream, // input or output is a Lisp_Object of type lstream
1065 LISP_OPAQUE, object, // input or output is a Lisp_Object of type opaque
1067 When specifying the sink, use lvalues, since the macro will assign to them,
1068 except when the sink is an lstream or a lisp buffer.
1070 The macros accept the kinds of sources and sinks appropriate for
1071 internal and external data representation. See the type_checking_assert
1072 macros below for the actual allowed types.
1074 Since some sources and sinks use one argument (a Lisp_Object) to
1075 specify them, while others take a (pointer, length) pair, we use
1076 some C preprocessor trickery to allow pair arguments to be specified
1077 by parenthesizing them, as in the examples above.
1079 Anything prefixed by dfc_ (`data format conversion') is private.
1080 They are only used to implement these macros.
1082 Using C_STRING* is appropriate for using with external APIs that take
1083 null-terminated strings. For internal data, we should try to be
1084 '\0'-clean - i.e. allow arbitrary data to contain embedded '\0'.
1086 Sometime in the future we might allow output to C_STRING_ALLOCA or
1087 C_STRING_MALLOC _only_ with TO_EXTERNAL_FORMAT(), not
1088 TO_INTERNAL_FORMAT(). */
1090 #define TO_EXTERNAL_FORMAT(source_type, source, sink_type, sink, coding_system) \
1092 dfc_conversion_type dfc_simplified_source_type; \
1093 dfc_conversion_type dfc_simplified_sink_type; \
1094 dfc_conversion_data dfc_source; \
1095 dfc_conversion_data dfc_sink; \
1097 type_checking_assert \
1098 ((DFC_TYPE_##source_type == DFC_TYPE_DATA || \
1099 DFC_TYPE_##source_type == DFC_TYPE_C_STRING || \
1100 DFC_TYPE_##source_type == DFC_TYPE_LISP_STRING || \
1101 DFC_TYPE_##source_type == DFC_TYPE_LISP_OPAQUE || \
1102 DFC_TYPE_##source_type == DFC_TYPE_LISP_LSTREAM) \
1104 (DFC_TYPE_##sink_type == DFC_TYPE_ALLOCA || \
1105 DFC_TYPE_##sink_type == DFC_TYPE_MALLOC || \
1106 DFC_TYPE_##sink_type == DFC_TYPE_C_STRING_ALLOCA || \
1107 DFC_TYPE_##sink_type == DFC_TYPE_C_STRING_MALLOC || \
1108 DFC_TYPE_##sink_type == DFC_TYPE_LISP_LSTREAM || \
1109 DFC_TYPE_##sink_type == DFC_TYPE_LISP_OPAQUE)); \
1111 DFC_SOURCE_##source_type##_TO_ARGS (source); \
1112 DFC_SINK_##sink_type##_TO_ARGS (sink); \
1114 DFC_CONVERT_TO_EXTERNAL_FORMAT (dfc_simplified_source_type, &dfc_source, \
1116 dfc_simplified_sink_type, &dfc_sink); \
1118 DFC_##sink_type##_USE_CONVERTED_DATA (sink); \
1121 #define TO_INTERNAL_FORMAT(source_type, source, sink_type, sink, coding_system) \
1123 dfc_conversion_type dfc_simplified_source_type; \
1124 dfc_conversion_type dfc_simplified_sink_type; \
1125 dfc_conversion_data dfc_source; \
1126 dfc_conversion_data dfc_sink; \
1128 type_checking_assert \
1129 ((DFC_TYPE_##source_type == DFC_TYPE_DATA || \
1130 DFC_TYPE_##source_type == DFC_TYPE_C_STRING || \
1131 DFC_TYPE_##source_type == DFC_TYPE_LISP_OPAQUE || \
1132 DFC_TYPE_##source_type == DFC_TYPE_LISP_LSTREAM) \
1134 (DFC_TYPE_##sink_type == DFC_TYPE_ALLOCA || \
1135 DFC_TYPE_##sink_type == DFC_TYPE_MALLOC || \
1136 DFC_TYPE_##sink_type == DFC_TYPE_C_STRING_ALLOCA || \
1137 DFC_TYPE_##sink_type == DFC_TYPE_C_STRING_MALLOC || \
1138 DFC_TYPE_##sink_type == DFC_TYPE_LISP_STRING || \
1139 DFC_TYPE_##sink_type == DFC_TYPE_LISP_LSTREAM || \
1140 DFC_TYPE_##sink_type == DFC_TYPE_LISP_BUFFER)); \
1142 DFC_SOURCE_##source_type##_TO_ARGS (source); \
1143 DFC_SINK_##sink_type##_TO_ARGS (sink); \
1145 DFC_CONVERT_TO_INTERNAL_FORMAT (dfc_simplified_source_type, &dfc_source, \
1147 dfc_simplified_sink_type, &dfc_sink); \
1149 DFC_##sink_type##_USE_CONVERTED_DATA (sink); \
1153 #define DFC_CONVERT_TO_EXTERNAL_FORMAT dfc_convert_to_external_format
1154 #define DFC_CONVERT_TO_INTERNAL_FORMAT dfc_convert_to_internal_format
1156 /* ignore coding_system argument */
1157 #define DFC_CONVERT_TO_EXTERNAL_FORMAT(a, b, coding_system, c, d) \
1158 dfc_convert_to_external_format (a, b, c, d)
1159 #define DFC_CONVERT_TO_INTERNAL_FORMAT(a, b, coding_system, c, d) \
1160 dfc_convert_to_internal_format (a, b, c, d)
1165 struct { const void *ptr; size_t len; } data;
1166 Lisp_Object lisp_object;
1167 } dfc_conversion_data;
1169 enum dfc_conversion_type
1175 DFC_TYPE_C_STRING_ALLOCA,
1176 DFC_TYPE_C_STRING_MALLOC,
1177 DFC_TYPE_LISP_STRING,
1178 DFC_TYPE_LISP_LSTREAM,
1179 DFC_TYPE_LISP_OPAQUE,
1180 DFC_TYPE_LISP_BUFFER
1182 typedef enum dfc_conversion_type dfc_conversion_type;
1184 /* WARNING: These use a static buffer. This can lead to disaster if
1185 these functions are not used *very* carefully. Another reason to only use
1186 TO_EXTERNAL_FORMAT() and TO_INTERNAL_FORMAT(). */
1188 dfc_convert_to_external_format (dfc_conversion_type source_type,
1189 dfc_conversion_data *source,
1191 Lisp_Object coding_system,
1193 dfc_conversion_type sink_type,
1194 dfc_conversion_data *sink);
1196 dfc_convert_to_internal_format (dfc_conversion_type source_type,
1197 dfc_conversion_data *source,
1199 Lisp_Object coding_system,
1201 dfc_conversion_type sink_type,
1202 dfc_conversion_data *sink);
1204 #define DFC_CPP_CAR(x,y) (x)
1205 #define DFC_CPP_CDR(x,y) (y)
1207 /* Convert `source' to args for dfc_convert_to_*_format() */
1208 #define DFC_SOURCE_DATA_TO_ARGS(val) do { \
1209 dfc_source.data.ptr = DFC_CPP_CAR val; \
1210 dfc_source.data.len = DFC_CPP_CDR val; \
1211 dfc_simplified_source_type = DFC_TYPE_DATA; \
1213 #define DFC_SOURCE_C_STRING_TO_ARGS(val) do { \
1214 dfc_source.data.len = \
1215 strlen ((char *) (dfc_source.data.ptr = (val))); \
1216 dfc_simplified_source_type = DFC_TYPE_DATA; \
1218 #define DFC_SOURCE_LISP_STRING_TO_ARGS(val) do { \
1219 Lisp_Object dfc_slsta = (val); \
1220 type_checking_assert (STRINGP (dfc_slsta)); \
1221 dfc_source.lisp_object = dfc_slsta; \
1222 dfc_simplified_source_type = DFC_TYPE_LISP_STRING; \
1224 #define DFC_SOURCE_LISP_LSTREAM_TO_ARGS(val) do { \
1225 Lisp_Object dfc_sllta = (val); \
1226 type_checking_assert (LSTREAMP (dfc_sllta)); \
1227 dfc_source.lisp_object = dfc_sllta; \
1228 dfc_simplified_source_type = DFC_TYPE_LISP_LSTREAM; \
1230 #define DFC_SOURCE_LISP_OPAQUE_TO_ARGS(val) do { \
1231 Lisp_Opaque *dfc_slota = XOPAQUE (val); \
1232 dfc_source.data.ptr = OPAQUE_DATA (dfc_slota); \
1233 dfc_source.data.len = OPAQUE_SIZE (dfc_slota); \
1234 dfc_simplified_source_type = DFC_TYPE_DATA; \
1237 /* Convert `sink' to args for dfc_convert_to_*_format() */
1238 #define DFC_SINK_ALLOCA_TO_ARGS(val) \
1239 dfc_simplified_sink_type = DFC_TYPE_DATA
1240 #define DFC_SINK_C_STRING_ALLOCA_TO_ARGS(val) \
1241 dfc_simplified_sink_type = DFC_TYPE_DATA
1242 #define DFC_SINK_MALLOC_TO_ARGS(val) \
1243 dfc_simplified_sink_type = DFC_TYPE_DATA
1244 #define DFC_SINK_C_STRING_MALLOC_TO_ARGS(val) \
1245 dfc_simplified_sink_type = DFC_TYPE_DATA
1246 #define DFC_SINK_LISP_STRING_TO_ARGS(val) \
1247 dfc_simplified_sink_type = DFC_TYPE_DATA
1248 #define DFC_SINK_LISP_OPAQUE_TO_ARGS(val) \
1249 dfc_simplified_sink_type = DFC_TYPE_DATA
1250 #define DFC_SINK_LISP_LSTREAM_TO_ARGS(val) do { \
1251 Lisp_Object dfc_sllta = (val); \
1252 type_checking_assert (LSTREAMP (dfc_sllta)); \
1253 dfc_sink.lisp_object = dfc_sllta; \
1254 dfc_simplified_sink_type = DFC_TYPE_LISP_LSTREAM; \
1256 #define DFC_SINK_LISP_BUFFER_TO_ARGS(val) do { \
1257 struct buffer *dfc_slbta = XBUFFER (val); \
1258 dfc_sink.lisp_object = \
1259 make_lisp_buffer_output_stream \
1260 (dfc_slbta, BUF_PT (dfc_slbta), 0); \
1261 dfc_simplified_sink_type = DFC_TYPE_LISP_LSTREAM; \
1264 /* Assign to the `sink' lvalue(s) using the converted data. */
1265 typedef union { char c; void *p; } *dfc_aliasing_voidpp;
1266 #define DFC_ALLOCA_USE_CONVERTED_DATA(sink) do { \
1267 void * dfc_sink_ret = alloca (dfc_sink.data.len + 1); \
1268 memcpy (dfc_sink_ret, dfc_sink.data.ptr, dfc_sink.data.len + 1); \
1269 ((dfc_aliasing_voidpp) &(DFC_CPP_CAR sink))->p = dfc_sink_ret; \
1270 (DFC_CPP_CDR sink) = dfc_sink.data.len; \
1272 #define DFC_MALLOC_USE_CONVERTED_DATA(sink) do { \
1273 void * dfc_sink_ret = xmalloc (dfc_sink.data.len + 1); \
1274 memcpy (dfc_sink_ret, dfc_sink.data.ptr, dfc_sink.data.len + 1); \
1275 ((dfc_aliasing_voidpp) &(DFC_CPP_CAR sink))->p = dfc_sink_ret; \
1276 (DFC_CPP_CDR sink) = dfc_sink.data.len; \
1278 #define DFC_C_STRING_ALLOCA_USE_CONVERTED_DATA(sink) do { \
1279 void * dfc_sink_ret = alloca (dfc_sink.data.len + 1); \
1280 memcpy (dfc_sink_ret, dfc_sink.data.ptr, dfc_sink.data.len + 1); \
1281 (sink) = (char *) dfc_sink_ret; \
1283 #define DFC_C_STRING_MALLOC_USE_CONVERTED_DATA(sink) do { \
1284 void * dfc_sink_ret = xmalloc (dfc_sink.data.len + 1); \
1285 memcpy (dfc_sink_ret, dfc_sink.data.ptr, dfc_sink.data.len + 1); \
1286 (sink) = (char *) dfc_sink_ret; \
1288 #define DFC_LISP_STRING_USE_CONVERTED_DATA(sink) \
1289 sink = make_string ((Bufbyte *) dfc_sink.data.ptr, dfc_sink.data.len)
1290 #define DFC_LISP_OPAQUE_USE_CONVERTED_DATA(sink) \
1291 sink = make_opaque (dfc_sink.data.ptr, dfc_sink.data.len)
1292 #define DFC_LISP_LSTREAM_USE_CONVERTED_DATA(sink) /* data already used */
1293 #define DFC_LISP_BUFFER_USE_CONVERTED_DATA(sink) \
1294 Lstream_delete (XLSTREAM (dfc_sink.lisp_object))
1296 /* Someday we might want to distinguish between Qnative and Qfile_name
1297 by using coding-system aliases, but for now it suffices to have
1298 these be identical. Qnative can be used as the coding_system
1299 argument to TO_EXTERNAL_FORMAT() and TO_INTERNAL_FORMAT(). */
1300 #define Qnative Qfile_name
1302 #if defined (WIN32_NATIVE) || defined (CYGWIN)
1303 /* #### kludge!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
1304 Remove this as soon as my Mule code is integrated. */
1305 #define Qmswindows_tstr Qnative
1308 /* More stand-ins */
1309 #define Qcommand_argument_encoding Qnative
1310 #define Qenvironment_variable_encoding Qnative
1312 /* Convenience macros for extremely common invocations */
1313 #define C_STRING_TO_EXTERNAL(in, out, coding_system) \
1314 TO_EXTERNAL_FORMAT (C_STRING, in, C_STRING_ALLOCA, out, coding_system)
1315 #define C_STRING_TO_EXTERNAL_MALLOC(in, out, coding_system) \
1316 TO_EXTERNAL_FORMAT (C_STRING, in, C_STRING_MALLOC, out, coding_system)
1317 #define EXTERNAL_TO_C_STRING(in, out, coding_system) \
1318 TO_INTERNAL_FORMAT (C_STRING, in, C_STRING_ALLOCA, out, coding_system)
1319 #define EXTERNAL_TO_C_STRING_MALLOC(in, out, coding_system) \
1320 TO_INTERNAL_FORMAT (C_STRING, in, C_STRING_MALLOC, out, coding_system)
1321 #define LISP_STRING_TO_EXTERNAL(in, out, coding_system) \
1322 TO_EXTERNAL_FORMAT (LISP_STRING, in, C_STRING_ALLOCA, out, coding_system)
1323 #define LISP_STRING_TO_EXTERNAL_MALLOC(in, out, coding_system) \
1324 TO_EXTERNAL_FORMAT (LISP_STRING, in, C_STRING_MALLOC, out, coding_system)
1327 /************************************************************************/
1329 /* fake charset functions */
1331 /************************************************************************/
1333 /* used when MULE is not defined, so that Charset-type stuff can still
1338 #define Vcharset_ascii Qnil
1340 #define CHAR_CHARSET(ch) Vcharset_ascii
1341 #define CHAR_LEADING_BYTE(ch) LEADING_BYTE_ASCII
1342 #define LEADING_BYTE_ASCII 0x80
1343 #define NUM_LEADING_BYTES 1
1344 #define MIN_LEADING_BYTE 0x80
1345 #define CHARSETP(cs) 1
1346 #define CHARSET_BY_LEADING_BYTE(lb) Vcharset_ascii
1347 #define XCHARSET_LEADING_BYTE(cs) LEADING_BYTE_ASCII
1348 #define XCHARSET_GRAPHIC(cs) -1
1349 #define XCHARSET_COLUMNS(cs) 1
1350 #define XCHARSET_DIMENSION(cs) 1
1351 #define REP_BYTES_BY_FIRST_BYTE(fb) 1
1352 #define BREAKUP_CHAR(ch, charset, byte1, byte2) do { \
1353 (charset) = Vcharset_ascii; \
1357 #define BYTE_ASCII_P(byte) 1
1361 /************************************************************************/
1363 /* higher-level buffer-position functions */
1365 /************************************************************************/
1367 /*----------------------------------------------------------------------*/
1368 /* Settor macros for important positions in a buffer */
1369 /*----------------------------------------------------------------------*/
1371 /* Set beginning of accessible range of buffer. */
1372 #define SET_BOTH_BUF_BEGV(buf, val, bival) \
1375 (buf)->begv = (bival); \
1376 (buf)->bufbegv = (val); \
1379 /* Set end of accessible range of buffer. */
1380 #define SET_BOTH_BUF_ZV(buf, val, bival) \
1383 (buf)->zv = (bival); \
1384 (buf)->bufzv = (val); \
1388 /* Since BEGV and ZV are almost never set, it's reasonable to enforce
1389 the restriction that the Bufpos and Bytind values must both be
1390 specified. However, point is set in lots and lots of places. So
1391 we provide the ability to specify both (for efficiency) or just
1393 #define BOTH_BUF_SET_PT(buf, val, bival) set_buffer_point (buf, val, bival)
1394 #define BI_BUF_SET_PT(buf, bival) \
1395 BOTH_BUF_SET_PT (buf, bytind_to_bufpos (buf, bival), bival)
1396 #define BUF_SET_PT(buf, value) \
1397 BOTH_BUF_SET_PT (buf, value, bufpos_to_bytind (buf, value))
1401 /* These macros exist in FSFmacs because SET_PT() in FSFmacs incorrectly
1402 does too much stuff, such as moving out of invisible extents. */
1403 #define TEMP_SET_PT(position) (temp_set_point ((position), current_buffer))
1404 #define SET_BUF_PT(buf, value) ((buf)->pt = (value))
1405 #endif /* FSFmacs */
1407 /*----------------------------------------------------------------------*/
1408 /* Miscellaneous buffer values */
1409 /*----------------------------------------------------------------------*/
1411 /* Number of characters in buffer */
1412 #define BUF_SIZE(buf) (BUF_Z (buf) - BUF_BEG (buf))
1414 /* Is this buffer narrowed? */
1415 #define BUF_NARROWED(buf) \
1416 ((BI_BUF_BEGV (buf) != BI_BUF_BEG (buf)) || \
1417 (BI_BUF_ZV (buf) != BI_BUF_Z (buf)))
1419 /* Modification count. */
1420 #define BUF_MODIFF(buf) ((buf)->text->modiff)
1422 /* Saved modification count. */
1423 #define BUF_SAVE_MODIFF(buf) ((buf)->text->save_modiff)
1426 #define BUF_FACECHANGE(buf) ((buf)->face_change)
1428 #define POINT_MARKER_P(marker) \
1429 (XMARKER (marker)->buffer != 0 && \
1430 EQ (marker, XMARKER (marker)->buffer->point_marker))
1432 #define BUF_MARKERS(buf) ((buf)->markers)
1436 The new definitions of CEILING_OF() and FLOOR_OF() differ semantically
1437 from the old ones (in FSF Emacs and XEmacs 19.11 and before).
1438 Conversion is as follows:
1440 OLD_BI_CEILING_OF(n) = NEW_BI_CEILING_OF(n) - 1
1441 OLD_BI_FLOOR_OF(n) = NEW_BI_FLOOR_OF(n + 1)
1443 The definitions were changed because the new definitions are more
1444 consistent with the way everything else works in Emacs.
1447 /* Properties of CEILING_OF and FLOOR_OF (also apply to BI_ variants):
1449 1) FLOOR_OF (CEILING_OF (n)) = n
1450 CEILING_OF (FLOOR_OF (n)) = n
1452 2) CEILING_OF (n) = n if and only if n = ZV
1453 FLOOR_OF (n) = n if and only if n = BEGV
1455 3) CEILING_OF (CEILING_OF (n)) = ZV
1456 FLOOR_OF (FLOOR_OF (n)) = BEGV
1458 4) The bytes in the regions
1460 [BYTE_ADDRESS (n), BYTE_ADDRESS_BEFORE (CEILING_OF (n))]
1464 [BYTE_ADDRESS (FLOOR_OF (n)), BYTE_ADDRESS_BEFORE (n)]
1470 /* Return the maximum index in the buffer it is safe to scan forwards
1471 past N to. This is used to prevent buffer scans from running into
1472 the gap (e.g. search.c). All characters between N and CEILING_OF(N)
1473 are located contiguous in memory. Note that the character *at*
1474 CEILING_OF(N) is not contiguous in memory. */
1475 #define BI_BUF_CEILING_OF(b, n) \
1476 ((n) < (b)->text->gpt && (b)->text->gpt < BI_BUF_ZV (b) ? \
1477 (b)->text->gpt : BI_BUF_ZV (b))
1478 #define BUF_CEILING_OF(b, n) \
1479 bytind_to_bufpos (b, BI_BUF_CEILING_OF (b, bufpos_to_bytind (b, n)))
1481 /* Return the minimum index in the buffer it is safe to scan backwards
1482 past N to. All characters between FLOOR_OF(N) and N are located
1483 contiguous in memory. Note that the character *at* N may not be
1484 contiguous in memory. */
1485 #define BI_BUF_FLOOR_OF(b, n) \
1486 (BI_BUF_BEGV (b) < (b)->text->gpt && (b)->text->gpt < (n) ? \
1487 (b)->text->gpt : BI_BUF_BEGV (b))
1488 #define BUF_FLOOR_OF(b, n) \
1489 bytind_to_bufpos (b, BI_BUF_FLOOR_OF (b, bufpos_to_bytind (b, n)))
1491 #define BI_BUF_CEILING_OF_IGNORE_ACCESSIBLE(b, n) \
1492 ((n) < (b)->text->gpt && (b)->text->gpt < BI_BUF_Z (b) ? \
1493 (b)->text->gpt : BI_BUF_Z (b))
1494 #define BUF_CEILING_OF_IGNORE_ACCESSIBLE(b, n) \
1496 (b, BI_BUF_CEILING_OF_IGNORE_ACCESSIBLE (b, bufpos_to_bytind (b, n)))
1498 #define BI_BUF_FLOOR_OF_IGNORE_ACCESSIBLE(b, n) \
1499 (BI_BUF_BEG (b) < (b)->text->gpt && (b)->text->gpt < (n) ? \
1500 (b)->text->gpt : BI_BUF_BEG (b))
1501 #define BUF_FLOOR_OF_IGNORE_ACCESSIBLE(b, n) \
1503 (b, BI_BUF_FLOOR_OF_IGNORE_ACCESSIBLE (b, bufpos_to_bytind (b, n)))
1506 extern struct buffer *current_buffer;
1508 /* This is the initial (startup) directory, as used for the *scratch* buffer.
1509 We're making this a global to make others aware of the startup directory.
1510 `initial_directory' is stored in external format.
1512 extern char initial_directory[];
1513 extern void init_initial_directory (void); /* initialize initial_directory */
1515 EXFUN (Fbuffer_disable_undo, 1);
1516 EXFUN (Fbuffer_modified_p, 1);
1517 EXFUN (Fbuffer_name, 1);
1518 EXFUN (Fcurrent_buffer, 0);
1519 EXFUN (Ferase_buffer, 1);
1520 EXFUN (Fget_buffer, 1);
1521 EXFUN (Fget_buffer_create, 1);
1522 EXFUN (Fget_file_buffer, 1);
1523 EXFUN (Fkill_buffer, 1);
1524 EXFUN (Fother_buffer, 3);
1525 EXFUN (Frecord_buffer, 1);
1526 EXFUN (Fset_buffer, 1);
1527 EXFUN (Fset_buffer_modified_p, 2);
1529 extern Lisp_Object QSscratch, Qafter_change_function, Qafter_change_functions;
1530 extern Lisp_Object Qbefore_change_function, Qbefore_change_functions;
1531 extern Lisp_Object Qbuffer_or_string_p, Qdefault_directory, Qfirst_change_hook;
1532 extern Lisp_Object Qpermanent_local, Vafter_change_function;
1533 extern Lisp_Object Vafter_change_functions, Vbefore_change_function;
1534 extern Lisp_Object Vbefore_change_functions, Vbuffer_alist, Vbuffer_defaults;
1535 extern Lisp_Object Vinhibit_read_only, Vtransient_mark_mode;
1537 /* This structure marks which slots in a buffer have corresponding
1538 default values in Vbuffer_defaults.
1539 Each such slot has a nonzero value in this structure.
1540 The value has only one nonzero bit.
1542 When a buffer has its own local value for a slot,
1543 the bit for that slot (found in the same slot in this structure)
1544 is turned on in the buffer's local_var_flags slot.
1546 If a slot in this structure is zero, then even though there may
1547 be a DEFVAR_BUFFER_LOCAL for the slot, there is no default value for it;
1548 and the corresponding slot in Vbuffer_defaults is not used. */
1550 extern struct buffer buffer_local_flags;
1553 /* Allocation of buffer data. */
1557 char *r_alloc (unsigned char **, size_t);
1558 char *r_re_alloc (unsigned char **, size_t);
1559 void r_alloc_free (unsigned char **);
1561 #define BUFFER_ALLOC(data, size) \
1562 ((Bufbyte *) r_alloc ((unsigned char **) &data, (size) * sizeof(Bufbyte)))
1563 #define BUFFER_REALLOC(data, size) \
1564 ((Bufbyte *) r_re_alloc ((unsigned char **) &data, (size) * sizeof(Bufbyte)))
1565 #define BUFFER_FREE(data) r_alloc_free ((unsigned char **) &(data))
1566 #define R_ALLOC_DECLARE(var,data) r_alloc_declare (&(var), data)
1568 #else /* !REL_ALLOC */
1570 #define BUFFER_ALLOC(data,size)\
1571 (data = xnew_array (Bufbyte, size))
1572 #define BUFFER_REALLOC(data,size)\
1573 ((Bufbyte *) xrealloc (data, (size) * sizeof(Bufbyte)))
1574 /* Avoid excess parentheses, or syntax errors may rear their heads. */
1575 #define BUFFER_FREE(data) xfree (data)
1576 #define R_ALLOC_DECLARE(var,data)
1578 #endif /* !REL_ALLOC */
1580 extern Lisp_Object Vbuffer_alist;
1581 void set_buffer_internal (struct buffer *b);
1582 struct buffer *decode_buffer (Lisp_Object buffer, int allow_string);
1584 /* from editfns.c */
1585 void widen_buffer (struct buffer *b, int no_clip);
1586 int beginning_of_line_p (struct buffer *b, Bufpos pt);
1589 void set_buffer_point (struct buffer *buf, Bufpos pos, Bytind bipos);
1590 void find_charsets_in_bufbyte_string (unsigned char *charsets,
1593 void find_charsets_in_emchar_string (unsigned char *charsets,
1596 int bufbyte_string_displayed_columns (const Bufbyte *str, Bytecount len);
1597 int emchar_string_displayed_columns (const Emchar *str, Charcount len);
1598 void convert_bufbyte_string_into_emchar_dynarr (const Bufbyte *str,
1600 Emchar_dynarr *dyn);
1601 Charcount convert_bufbyte_string_into_emchar_string (const Bufbyte *str,
1604 void convert_emchar_string_into_bufbyte_dynarr (Emchar *arr, int nels,
1605 Bufbyte_dynarr *dyn);
1606 Bufbyte *convert_emchar_string_into_malloced_string (Emchar *arr, int nels,
1607 Bytecount *len_out);
1609 void init_buffer_markers (struct buffer *b);
1610 void uninit_buffer_markers (struct buffer *b);
1612 /* flags for get_buffer_pos_char(), get_buffer_range_char(), etc. */
1613 /* At most one of GB_COERCE_RANGE and GB_NO_ERROR_IF_BAD should be
1614 specified. At most one of GB_NEGATIVE_FROM_END and GB_NO_ERROR_IF_BAD
1615 should be specified. */
1617 #define GB_ALLOW_PAST_ACCESSIBLE (1 << 0)
1618 #define GB_ALLOW_NIL (1 << 1)
1619 #define GB_CHECK_ORDER (1 << 2)
1620 #define GB_COERCE_RANGE (1 << 3)
1621 #define GB_NO_ERROR_IF_BAD (1 << 4)
1622 #define GB_NEGATIVE_FROM_END (1 << 5)
1623 #define GB_HISTORICAL_STRING_BEHAVIOR (GB_NEGATIVE_FROM_END | GB_ALLOW_NIL)
1625 Bufpos get_buffer_pos_char (struct buffer *b, Lisp_Object pos,
1626 unsigned int flags);
1627 Bytind get_buffer_pos_byte (struct buffer *b, Lisp_Object pos,
1628 unsigned int flags);
1629 void get_buffer_range_char (struct buffer *b, Lisp_Object from, Lisp_Object to,
1630 Bufpos *from_out, Bufpos *to_out,
1631 unsigned int flags);
1632 void get_buffer_range_byte (struct buffer *b, Lisp_Object from, Lisp_Object to,
1633 Bytind *from_out, Bytind *to_out,
1634 unsigned int flags);
1635 Charcount get_string_pos_char (Lisp_Object string, Lisp_Object pos,
1636 unsigned int flags);
1637 Bytecount get_string_pos_byte (Lisp_Object string, Lisp_Object pos,
1638 unsigned int flags);
1639 void get_string_range_char (Lisp_Object string, Lisp_Object from,
1640 Lisp_Object to, Charcount *from_out,
1641 Charcount *to_out, unsigned int flags);
1642 void get_string_range_byte (Lisp_Object string, Lisp_Object from,
1643 Lisp_Object to, Bytecount *from_out,
1644 Bytecount *to_out, unsigned int flags);
1645 Bufpos get_buffer_or_string_pos_char (Lisp_Object object, Lisp_Object pos,
1646 unsigned int flags);
1647 Bytind get_buffer_or_string_pos_byte (Lisp_Object object, Lisp_Object pos,
1648 unsigned int flags);
1649 void get_buffer_or_string_range_char (Lisp_Object object, Lisp_Object from,
1650 Lisp_Object to, Bufpos *from_out,
1651 Bufpos *to_out, unsigned int flags);
1652 void get_buffer_or_string_range_byte (Lisp_Object object, Lisp_Object from,
1653 Lisp_Object to, Bytind *from_out,
1654 Bytind *to_out, unsigned int flags);
1655 Bufpos buffer_or_string_accessible_begin_char (Lisp_Object object);
1656 Bufpos buffer_or_string_accessible_end_char (Lisp_Object object);
1657 Bytind buffer_or_string_accessible_begin_byte (Lisp_Object object);
1658 Bytind buffer_or_string_accessible_end_byte (Lisp_Object object);
1659 Bufpos buffer_or_string_absolute_begin_char (Lisp_Object object);
1660 Bufpos buffer_or_string_absolute_end_char (Lisp_Object object);
1661 Bytind buffer_or_string_absolute_begin_byte (Lisp_Object object);
1662 Bytind buffer_or_string_absolute_end_byte (Lisp_Object object);
1663 void record_buffer (Lisp_Object buf);
1664 Lisp_Object get_buffer (Lisp_Object name,
1665 int error_if_deleted_or_does_not_exist);
1666 int map_over_sharing_buffers (struct buffer *buf,
1667 int (*mapfun) (struct buffer *buf,
1672 /************************************************************************/
1673 /* Case conversion */
1674 /************************************************************************/
1676 /* A "trt" table is a mapping from characters to other characters,
1677 typically used to convert between uppercase and lowercase. For
1678 compatibility reasons, trt tables are currently in the form of
1679 a Lisp string of 256 characters, specifying the conversion for each
1680 of the first 256 Emacs characters (i.e. the 256 Latin-1 characters).
1681 This should be generalized at some point to support conversions for
1682 all of the allowable Mule characters.
1685 /* The _1 macros are named as such because they assume that you have
1686 already guaranteed that the character values are all in the range
1687 0 - 255. Bad lossage will happen otherwise. */
1689 # define MAKE_TRT_TABLE() Fmake_string (make_int (256), make_char (0))
1690 # define TRT_TABLE_AS_STRING(table) XSTRING_DATA (table)
1691 # define TRT_TABLE_CHAR_1(table, ch) \
1692 string_char (XSTRING (table), (Charcount) ch)
1693 # define SET_TRT_TABLE_CHAR_1(table, ch1, ch2) \
1694 set_string_char (XSTRING (table), (Charcount) ch1, ch2)
1697 # define MAKE_MIRROR_TRT_TABLE() make_opaque (OPAQUE_CLEAR, 256)
1698 # define MIRROR_TRT_TABLE_AS_STRING(table) ((Bufbyte *) XOPAQUE_DATA (table))
1699 # define MIRROR_TRT_TABLE_CHAR_1(table, ch) \
1700 ((Emchar) (MIRROR_TRT_TABLE_AS_STRING (table)[ch]))
1701 # define SET_MIRROR_TRT_TABLE_CHAR_1(table, ch1, ch2) \
1702 (MIRROR_TRT_TABLE_AS_STRING (table)[ch1] = (Bufbyte) (ch2))
1705 # define IN_TRT_TABLE_DOMAIN(c) (((EMACS_UINT) (c)) <= 255)
1708 #define MIRROR_DOWNCASE_TABLE_AS_STRING(buf) \
1709 MIRROR_TRT_TABLE_AS_STRING (buf->mirror_downcase_table)
1710 #define MIRROR_UPCASE_TABLE_AS_STRING(buf) \
1711 MIRROR_TRT_TABLE_AS_STRING (buf->mirror_upcase_table)
1712 #define MIRROR_CANON_TABLE_AS_STRING(buf) \
1713 MIRROR_TRT_TABLE_AS_STRING (buf->mirror_case_canon_table)
1714 #define MIRROR_EQV_TABLE_AS_STRING(buf) \
1715 MIRROR_TRT_TABLE_AS_STRING (buf->mirror_case_eqv_table)
1717 #define MIRROR_DOWNCASE_TABLE_AS_STRING(buf) \
1718 TRT_TABLE_AS_STRING (buf->downcase_table)
1719 #define MIRROR_UPCASE_TABLE_AS_STRING(buf) \
1720 TRT_TABLE_AS_STRING (buf->upcase_table)
1721 #define MIRROR_CANON_TABLE_AS_STRING(buf) \
1722 TRT_TABLE_AS_STRING (buf->case_canon_table)
1723 #define MIRROR_EQV_TABLE_AS_STRING(buf) \
1724 TRT_TABLE_AS_STRING (buf->case_eqv_table)
1727 INLINE_HEADER Emchar TRT_TABLE_OF (Lisp_Object trt, Emchar c);
1728 INLINE_HEADER Emchar
1729 TRT_TABLE_OF (Lisp_Object trt, Emchar c)
1731 return IN_TRT_TABLE_DOMAIN (c) ? TRT_TABLE_CHAR_1 (trt, c) : c;
1734 /* Macros used below. */
1735 #define DOWNCASE_TABLE_OF(buf, c) TRT_TABLE_OF (buf->downcase_table, c)
1736 #define UPCASE_TABLE_OF(buf, c) TRT_TABLE_OF (buf->upcase_table, c)
1738 /* 1 if CH is upper case. */
1740 INLINE_HEADER int UPPERCASEP (struct buffer *buf, Emchar ch);
1742 UPPERCASEP (struct buffer *buf, Emchar ch)
1744 return DOWNCASE_TABLE_OF (buf, ch) != ch;
1747 /* 1 if CH is lower case. */
1749 INLINE_HEADER int LOWERCASEP (struct buffer *buf, Emchar ch);
1751 LOWERCASEP (struct buffer *buf, Emchar ch)
1753 return (UPCASE_TABLE_OF (buf, ch) != ch &&
1754 DOWNCASE_TABLE_OF (buf, ch) == ch);
1757 /* 1 if CH is neither upper nor lower case. */
1759 INLINE_HEADER int NOCASEP (struct buffer *buf, Emchar ch);
1761 NOCASEP (struct buffer *buf, Emchar ch)
1763 return UPCASE_TABLE_OF (buf, ch) == ch;
1766 /* Upcase a character, or make no change if that cannot be done. */
1768 INLINE_HEADER Emchar UPCASE (struct buffer *buf, Emchar ch);
1769 INLINE_HEADER Emchar
1770 UPCASE (struct buffer *buf, Emchar ch)
1772 return (DOWNCASE_TABLE_OF (buf, ch) == ch) ? UPCASE_TABLE_OF (buf, ch) : ch;
1775 /* Upcase a character known to be not upper case. Unused. */
1777 #define UPCASE1(buf, ch) UPCASE_TABLE_OF (buf, ch)
1779 /* Downcase a character, or make no change if that cannot be done. */
1781 #define DOWNCASE(buf, ch) DOWNCASE_TABLE_OF (buf, ch)
1783 /************************************************************************/
1784 /* Lisp string representation convenience functions */
1785 /************************************************************************/
1786 /* Because the representation of internally formatted data is subject to change,
1787 It's bad style to do something like strcmp (XSTRING_DATA (s), "foo")
1788 Instead, use the portable: bufbyte_strcmp (XSTRING_DATA (s), "foo")
1789 or bufbyte_memcmp (XSTRING_DATA (s), "foo", 3) */
1791 /* Like strcmp, except first arg points at internally formatted data,
1792 while the second points at a string of only ASCII chars. */
1794 bufbyte_strcmp (const Bufbyte *bp, const char *ascii_string);
1796 bufbyte_strcmp (const Bufbyte *bp, const char *ascii_string)
1802 type_checking_assert (BYTE_ASCII_P (*ascii_string));
1803 if ((diff = charptr_emchar (bp) - *(Bufbyte *) ascii_string) != 0)
1805 if (*ascii_string == '\0')
1811 return strcmp ((char *)bp, ascii_string);
1816 /* Like memcmp, except first arg points at internally formatted data,
1817 while the second points at a string of only ASCII chars. */
1819 bufbyte_memcmp (const Bufbyte *bp, const char *ascii_string, size_t len);
1821 bufbyte_memcmp (const Bufbyte *bp, const char *ascii_string, size_t len)
1826 int diff = charptr_emchar (bp) - *(Bufbyte *) ascii_string;
1827 type_checking_assert (BYTE_ASCII_P (*ascii_string));
1835 return memcmp (bp, ascii_string, len);
1839 #endif /* INCLUDED_buffer_h_ */