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dcfdbac7 | 1 | /* GNU Emacs case conversion functions. |
0b5538bd | 2 | Copyright (C) 1985, 1994, 1997, 1998, 1999, 2001, 2002, 2003, 2004, |
5df4f04c | 3 | 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. |
dcfdbac7 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
9ec0b715 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
dcfdbac7 | 8 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
dcfdbac7 JB |
11 | |
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
dcfdbac7 JB |
19 | |
20 | ||
18160b98 | 21 | #include <config.h> |
d7306fe6 | 22 | #include <setjmp.h> |
dcfdbac7 JB |
23 | #include "lisp.h" |
24 | #include "buffer.h" | |
83be827a | 25 | #include "character.h" |
dcfdbac7 JB |
26 | #include "commands.h" |
27 | #include "syntax.h" | |
66da2880 | 28 | #include "composite.h" |
e35f6ff7 | 29 | #include "keymap.h" |
dcfdbac7 JB |
30 | |
31 | enum case_action {CASE_UP, CASE_DOWN, CASE_CAPITALIZE, CASE_CAPITALIZE_UP}; | |
a04538da KH |
32 | |
33 | Lisp_Object Qidentity; | |
dcfdbac7 JB |
34 | \f |
35 | Lisp_Object | |
36 | casify_object (flag, obj) | |
37 | enum case_action flag; | |
38 | Lisp_Object obj; | |
39 | { | |
2422e50a | 40 | register int c, c1; |
dcfdbac7 JB |
41 | register int inword = flag == CASE_DOWN; |
42 | ||
bd47bd35 RS |
43 | /* If the case table is flagged as modified, rescan it. */ |
44 | if (NILP (XCHAR_TABLE (current_buffer->downcase_table)->extras[1])) | |
45 | Fset_case_table (current_buffer->downcase_table); | |
46 | ||
0d64f689 | 47 | if (INTEGERP (obj)) |
dcfdbac7 | 48 | { |
0d64f689 KH |
49 | int flagbits = (CHAR_ALT | CHAR_SUPER | CHAR_HYPER |
50 | | CHAR_SHIFT | CHAR_CTL | CHAR_META); | |
51 | int flags = XINT (obj) & flagbits; | |
52 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); | |
53 | ||
54 | /* If the character has higher bits set | |
55 | above the flags, return it unchanged. | |
56 | It is not a real character. */ | |
57 | if ((unsigned) XFASTINT (obj) > (unsigned) flagbits) | |
58 | return obj; | |
59 | ||
60 | c1 = XFASTINT (obj) & ~flagbits; | |
1fb5aad7 SM |
61 | /* FIXME: Even if enable-multibyte-characters is nil, we may |
62 | manipulate multibyte chars. This means we have a bug for latin-1 | |
63 | chars since when we receive an int 128-255 we can't tell whether | |
64 | it's an eight-bit byte or a latin-1 char. */ | |
65 | if (c1 >= 256) | |
66 | multibyte = 1; | |
0d64f689 KH |
67 | if (! multibyte) |
68 | MAKE_CHAR_MULTIBYTE (c1); | |
69 | c = DOWNCASE (c1); | |
70 | if (inword) | |
71 | XSETFASTINT (obj, c | flags); | |
72 | else if (c == (XFASTINT (obj) & ~flagbits)) | |
dcfdbac7 | 73 | { |
0d64f689 KH |
74 | if (! inword) |
75 | c = UPCASE1 (c1); | |
2422e50a | 76 | if (! multibyte) |
0d64f689 KH |
77 | MAKE_CHAR_UNIBYTE (c); |
78 | XSETFASTINT (obj, c | flags); | |
dcfdbac7 | 79 | } |
0d64f689 KH |
80 | return obj; |
81 | } | |
5245463a | 82 | |
438eba3c SM |
83 | if (!STRINGP (obj)) |
84 | wrong_type_argument (Qchar_or_string_p, obj); | |
85 | else if (!STRING_MULTIBYTE (obj)) | |
0d64f689 | 86 | { |
438eba3c SM |
87 | EMACS_INT i; |
88 | EMACS_INT size = SCHARS (obj); | |
a0615d90 | 89 | |
0d64f689 | 90 | obj = Fcopy_sequence (obj); |
438eba3c | 91 | for (i = 0; i < size; i++) |
0d64f689 | 92 | { |
438eba3c | 93 | c = SREF (obj, i); |
4c0354d7 | 94 | MAKE_CHAR_MULTIBYTE (c); |
0d64f689 KH |
95 | c1 = c; |
96 | if (inword && flag != CASE_CAPITALIZE_UP) | |
97 | c = DOWNCASE (c); | |
98 | else if (!UPPERCASEP (c) | |
99 | && (!inword || flag != CASE_CAPITALIZE_UP)) | |
100 | c = UPCASE1 (c1); | |
101 | if ((int) flag >= (int) CASE_CAPITALIZE) | |
102 | inword = (SYNTAX (c) == Sword); | |
103 | if (c != c1) | |
104 | { | |
0d64f689 | 105 | MAKE_CHAR_UNIBYTE (c); |
438eba3c SM |
106 | /* If the char can't be converted to a valid byte, just don't |
107 | change it. */ | |
108 | if (c >= 0 && c < 256) | |
109 | SSET (obj, i, c); | |
110 | } | |
111 | } | |
112 | return obj; | |
994b75e0 SM |
113 | } |
114 | else | |
115 | { | |
116 | EMACS_INT i, i_byte, size = SCHARS (obj); | |
117 | int len; | |
438eba3c SM |
118 | USE_SAFE_ALLOCA; |
119 | unsigned char *dst, *o; | |
120 | /* Over-allocate by 12%: this is a minor overhead, but should be | |
121 | sufficient in 99.999% of the cases to avoid a reallocation. */ | |
122 | EMACS_INT o_size = SBYTES (obj) + SBYTES (obj) / 8 + MAX_MULTIBYTE_LENGTH; | |
123 | SAFE_ALLOCA (dst, void *, o_size); | |
124 | o = dst; | |
125 | ||
126 | for (i = i_byte = 0; i < size; i++, i_byte += len) | |
127 | { | |
128 | if ((o - dst) + MAX_MULTIBYTE_LENGTH > o_size) | |
129 | { /* Not enough space for the next char: grow the destination. */ | |
130 | unsigned char *old_dst = dst; | |
131 | o_size += o_size; /* Probably overkill, but extremely rare. */ | |
132 | SAFE_ALLOCA (dst, void *, o_size); | |
133 | bcopy (old_dst, dst, o - old_dst); | |
134 | o = dst + (o - old_dst); | |
a0615d90 | 135 | } |
62a6e103 | 136 | c = STRING_CHAR_AND_LENGTH (SDATA (obj) + i_byte, len); |
438eba3c SM |
137 | if (inword && flag != CASE_CAPITALIZE_UP) |
138 | c = DOWNCASE (c); | |
139 | else if (!UPPERCASEP (c) | |
140 | && (!inword || flag != CASE_CAPITALIZE_UP)) | |
141 | c = UPCASE1 (c); | |
142 | if ((int) flag >= (int) CASE_CAPITALIZE) | |
143 | inword = (SYNTAX (c) == Sword); | |
144 | o += CHAR_STRING (c, o); | |
dcfdbac7 | 145 | } |
438eba3c SM |
146 | eassert (o - dst <= o_size); |
147 | obj = make_multibyte_string (dst, size, o - dst); | |
148 | SAFE_FREE (); | |
0d64f689 | 149 | return obj; |
dcfdbac7 JB |
150 | } |
151 | } | |
152 | ||
153 | DEFUN ("upcase", Fupcase, Supcase, 1, 1, 0, | |
fdb82f93 PJ |
154 | doc: /* Convert argument to upper case and return that. |
155 | The argument may be a character or string. The result has the same type. | |
156 | The argument object is not altered--the value is a copy. | |
157 | See also `capitalize', `downcase' and `upcase-initials'. */) | |
158 | (obj) | |
dcfdbac7 JB |
159 | Lisp_Object obj; |
160 | { | |
161 | return casify_object (CASE_UP, obj); | |
162 | } | |
163 | ||
164 | DEFUN ("downcase", Fdowncase, Sdowncase, 1, 1, 0, | |
fdb82f93 PJ |
165 | doc: /* Convert argument to lower case and return that. |
166 | The argument may be a character or string. The result has the same type. | |
167 | The argument object is not altered--the value is a copy. */) | |
168 | (obj) | |
dcfdbac7 JB |
169 | Lisp_Object obj; |
170 | { | |
171 | return casify_object (CASE_DOWN, obj); | |
172 | } | |
173 | ||
174 | DEFUN ("capitalize", Fcapitalize, Scapitalize, 1, 1, 0, | |
fdb82f93 PJ |
175 | doc: /* Convert argument to capitalized form and return that. |
176 | This means that each word's first character is upper case | |
177 | and the rest is lower case. | |
178 | The argument may be a character or string. The result has the same type. | |
179 | The argument object is not altered--the value is a copy. */) | |
180 | (obj) | |
dcfdbac7 JB |
181 | Lisp_Object obj; |
182 | { | |
183 | return casify_object (CASE_CAPITALIZE, obj); | |
184 | } | |
96927ba4 | 185 | |
2371fad4 KH |
186 | /* Like Fcapitalize but change only the initials. */ |
187 | ||
8cef1f78 | 188 | DEFUN ("upcase-initials", Fupcase_initials, Supcase_initials, 1, 1, 0, |
fdb82f93 PJ |
189 | doc: /* Convert the initial of each word in the argument to upper case. |
190 | Do not change the other letters of each word. | |
191 | The argument may be a character or string. The result has the same type. | |
192 | The argument object is not altered--the value is a copy. */) | |
193 | (obj) | |
8cef1f78 RS |
194 | Lisp_Object obj; |
195 | { | |
196 | return casify_object (CASE_CAPITALIZE_UP, obj); | |
197 | } | |
dcfdbac7 JB |
198 | \f |
199 | /* flag is CASE_UP, CASE_DOWN or CASE_CAPITALIZE or CASE_CAPITALIZE_UP. | |
200 | b and e specify range of buffer to operate on. */ | |
201 | ||
dfcf069d | 202 | void |
dcfdbac7 JB |
203 | casify_region (flag, b, e) |
204 | enum case_action flag; | |
205 | Lisp_Object b, e; | |
206 | { | |
dcfdbac7 JB |
207 | register int c; |
208 | register int inword = flag == CASE_DOWN; | |
a0615d90 | 209 | register int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
7927d8e3 SM |
210 | EMACS_INT start, end; |
211 | EMACS_INT start_byte, end_byte; | |
212 | EMACS_INT first = -1, last; /* Position of first and last changes. */ | |
213 | EMACS_INT opoint = PT; | |
214 | EMACS_INT opoint_byte = PT_BYTE; | |
dcfdbac7 JB |
215 | |
216 | if (EQ (b, e)) | |
217 | /* Not modifying because nothing marked */ | |
218 | return; | |
219 | ||
bd47bd35 RS |
220 | /* If the case table is flagged as modified, rescan it. */ |
221 | if (NILP (XCHAR_TABLE (current_buffer->downcase_table)->extras[1])) | |
222 | Fset_case_table (current_buffer->downcase_table); | |
223 | ||
dcfdbac7 | 224 | validate_region (&b, &e); |
2371fad4 KH |
225 | start = XFASTINT (b); |
226 | end = XFASTINT (e); | |
3e145152 | 227 | modify_region (current_buffer, start, end, 0); |
2371fad4 | 228 | record_change (start, end - start); |
4c7b7eab RS |
229 | start_byte = CHAR_TO_BYTE (start); |
230 | end_byte = CHAR_TO_BYTE (end); | |
dcfdbac7 | 231 | |
2422e50a | 232 | while (start < end) |
a04538da | 233 | { |
2422e50a KH |
234 | int c2, len; |
235 | ||
236 | if (multibyte) | |
237 | { | |
238 | c = FETCH_MULTIBYTE_CHAR (start_byte); | |
239 | len = CHAR_BYTES (c); | |
240 | } | |
241 | else | |
242 | { | |
243 | c = FETCH_BYTE (start_byte); | |
244 | MAKE_CHAR_MULTIBYTE (c); | |
245 | len = 1; | |
246 | } | |
247 | c2 = c; | |
a0615d90 KH |
248 | if (inword && flag != CASE_CAPITALIZE_UP) |
249 | c = DOWNCASE (c); | |
250 | else if (!UPPERCASEP (c) | |
251 | && (!inword || flag != CASE_CAPITALIZE_UP)) | |
252 | c = UPCASE1 (c); | |
a0615d90 | 253 | if ((int) flag >= (int) CASE_CAPITALIZE) |
8f924df7 | 254 | inword = ((SYNTAX (c) == Sword) && (inword || !SYNTAX_PREFIX (c))); |
2422e50a | 255 | if (c != c2) |
a04538da | 256 | { |
7927d8e3 SM |
257 | last = start; |
258 | if (first < 0) | |
259 | first = start; | |
260 | ||
2422e50a KH |
261 | if (! multibyte) |
262 | { | |
263 | MAKE_CHAR_UNIBYTE (c); | |
264 | FETCH_BYTE (start_byte) = c; | |
265 | } | |
266 | else if (ASCII_CHAR_P (c2) && ASCII_CHAR_P (c)) | |
267 | FETCH_BYTE (start_byte) = c; | |
08588bfa | 268 | else |
a04538da | 269 | { |
08588bfa | 270 | int tolen = CHAR_BYTES (c); |
2422e50a | 271 | int j; |
66da2880 | 272 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
a04538da | 273 | |
2422e50a | 274 | CHAR_STRING (c, str); |
08588bfa KH |
275 | if (len == tolen) |
276 | { | |
277 | /* Length is unchanged. */ | |
278 | for (j = 0; j < len; ++j) | |
279 | FETCH_BYTE (start_byte + j) = str[j]; | |
280 | } | |
281 | else | |
282 | { | |
283 | /* Replace one character with the other, | |
284 | keeping text properties the same. */ | |
285 | replace_range_2 (start, start_byte, | |
286 | start + 1, start_byte + len, | |
287 | str, 1, tolen, | |
288 | 0); | |
289 | len = tolen; | |
290 | } | |
a04538da | 291 | } |
a04538da | 292 | } |
2422e50a KH |
293 | start++; |
294 | start_byte += len; | |
dcfdbac7 JB |
295 | } |
296 | ||
8f924df7 KH |
297 | if (PT != opoint) |
298 | TEMP_SET_PT_BOTH (opoint, opoint_byte); | |
299 | ||
7927d8e3 | 300 | if (first >= 0) |
66da2880 | 301 | { |
7927d8e3 SM |
302 | signal_after_change (first, last + 1 - first, last + 1 - first); |
303 | update_compositions (first, last + 1, CHECK_ALL); | |
66da2880 | 304 | } |
dcfdbac7 JB |
305 | } |
306 | ||
307 | DEFUN ("upcase-region", Fupcase_region, Supcase_region, 2, 2, "r", | |
fdb82f93 PJ |
308 | doc: /* Convert the region to upper case. In programs, wants two arguments. |
309 | These arguments specify the starting and ending character numbers of | |
310 | the region to operate on. When used as a command, the text between | |
311 | point and the mark is operated on. | |
312 | See also `capitalize-region'. */) | |
313 | (beg, end) | |
8c22d56c | 314 | Lisp_Object beg, end; |
dcfdbac7 | 315 | { |
8c22d56c | 316 | casify_region (CASE_UP, beg, end); |
dcfdbac7 JB |
317 | return Qnil; |
318 | } | |
319 | ||
320 | DEFUN ("downcase-region", Fdowncase_region, Sdowncase_region, 2, 2, "r", | |
fdb82f93 PJ |
321 | doc: /* Convert the region to lower case. In programs, wants two arguments. |
322 | These arguments specify the starting and ending character numbers of | |
323 | the region to operate on. When used as a command, the text between | |
324 | point and the mark is operated on. */) | |
325 | (beg, end) | |
8c22d56c | 326 | Lisp_Object beg, end; |
dcfdbac7 | 327 | { |
8c22d56c | 328 | casify_region (CASE_DOWN, beg, end); |
dcfdbac7 JB |
329 | return Qnil; |
330 | } | |
331 | ||
332 | DEFUN ("capitalize-region", Fcapitalize_region, Scapitalize_region, 2, 2, "r", | |
fdb82f93 PJ |
333 | doc: /* Convert the region to capitalized form. |
334 | Capitalized form means each word's first character is upper case | |
335 | and the rest of it is lower case. | |
336 | In programs, give two arguments, the starting and ending | |
337 | character positions to operate on. */) | |
338 | (beg, end) | |
8c22d56c | 339 | Lisp_Object beg, end; |
dcfdbac7 | 340 | { |
8c22d56c | 341 | casify_region (CASE_CAPITALIZE, beg, end); |
dcfdbac7 JB |
342 | return Qnil; |
343 | } | |
344 | ||
2371fad4 KH |
345 | /* Like Fcapitalize_region but change only the initials. */ |
346 | ||
8cef1f78 RS |
347 | DEFUN ("upcase-initials-region", Fupcase_initials_region, |
348 | Supcase_initials_region, 2, 2, "r", | |
fdb82f93 PJ |
349 | doc: /* Upcase the initial of each word in the region. |
350 | Subsequent letters of each word are not changed. | |
351 | In programs, give two arguments, the starting and ending | |
352 | character positions to operate on. */) | |
353 | (beg, end) | |
8c22d56c | 354 | Lisp_Object beg, end; |
8cef1f78 | 355 | { |
8c22d56c | 356 | casify_region (CASE_CAPITALIZE_UP, beg, end); |
8cef1f78 RS |
357 | return Qnil; |
358 | } | |
dcfdbac7 | 359 | \f |
438eba3c | 360 | static Lisp_Object |
34628a90 | 361 | operate_on_word (arg, newpoint) |
dcfdbac7 | 362 | Lisp_Object arg; |
438eba3c | 363 | EMACS_INT *newpoint; |
dcfdbac7 | 364 | { |
39fb55ff | 365 | Lisp_Object val; |
34628a90 | 366 | int farend; |
2371fad4 | 367 | int iarg; |
dcfdbac7 | 368 | |
b7826503 | 369 | CHECK_NUMBER (arg); |
2371fad4 | 370 | iarg = XINT (arg); |
6ec8bbd2 | 371 | farend = scan_words (PT, iarg); |
dcfdbac7 | 372 | if (!farend) |
2371fad4 | 373 | farend = iarg > 0 ? ZV : BEGV; |
dcfdbac7 | 374 | |
6ec8bbd2 | 375 | *newpoint = PT > farend ? PT : farend; |
18e23fd0 | 376 | XSETFASTINT (val, farend); |
dcfdbac7 JB |
377 | |
378 | return val; | |
379 | } | |
380 | ||
381 | DEFUN ("upcase-word", Fupcase_word, Supcase_word, 1, 1, "p", | |
fdb82f93 PJ |
382 | doc: /* Convert following word (or ARG words) to upper case, moving over. |
383 | With negative argument, convert previous words but do not move. | |
384 | See also `capitalize-word'. */) | |
385 | (arg) | |
dcfdbac7 JB |
386 | Lisp_Object arg; |
387 | { | |
34628a90 | 388 | Lisp_Object beg, end; |
438eba3c | 389 | EMACS_INT newpoint; |
6ec8bbd2 | 390 | XSETFASTINT (beg, PT); |
34628a90 RS |
391 | end = operate_on_word (arg, &newpoint); |
392 | casify_region (CASE_UP, beg, end); | |
393 | SET_PT (newpoint); | |
dcfdbac7 JB |
394 | return Qnil; |
395 | } | |
396 | ||
397 | DEFUN ("downcase-word", Fdowncase_word, Sdowncase_word, 1, 1, "p", | |
fdb82f93 PJ |
398 | doc: /* Convert following word (or ARG words) to lower case, moving over. |
399 | With negative argument, convert previous words but do not move. */) | |
400 | (arg) | |
dcfdbac7 JB |
401 | Lisp_Object arg; |
402 | { | |
34628a90 | 403 | Lisp_Object beg, end; |
438eba3c | 404 | EMACS_INT newpoint; |
6ec8bbd2 | 405 | XSETFASTINT (beg, PT); |
34628a90 RS |
406 | end = operate_on_word (arg, &newpoint); |
407 | casify_region (CASE_DOWN, beg, end); | |
408 | SET_PT (newpoint); | |
dcfdbac7 JB |
409 | return Qnil; |
410 | } | |
411 | ||
412 | DEFUN ("capitalize-word", Fcapitalize_word, Scapitalize_word, 1, 1, "p", | |
fdb82f93 PJ |
413 | doc: /* Capitalize the following word (or ARG words), moving over. |
414 | This gives the word(s) a first character in upper case | |
415 | and the rest lower case. | |
416 | With negative argument, capitalize previous words but do not move. */) | |
417 | (arg) | |
dcfdbac7 JB |
418 | Lisp_Object arg; |
419 | { | |
34628a90 | 420 | Lisp_Object beg, end; |
438eba3c | 421 | EMACS_INT newpoint; |
6ec8bbd2 | 422 | XSETFASTINT (beg, PT); |
34628a90 RS |
423 | end = operate_on_word (arg, &newpoint); |
424 | casify_region (CASE_CAPITALIZE, beg, end); | |
425 | SET_PT (newpoint); | |
dcfdbac7 JB |
426 | return Qnil; |
427 | } | |
428 | \f | |
dfcf069d | 429 | void |
dcfdbac7 JB |
430 | syms_of_casefiddle () |
431 | { | |
d67b4f80 | 432 | Qidentity = intern_c_string ("identity"); |
a04538da | 433 | staticpro (&Qidentity); |
dcfdbac7 JB |
434 | defsubr (&Supcase); |
435 | defsubr (&Sdowncase); | |
436 | defsubr (&Scapitalize); | |
8cef1f78 | 437 | defsubr (&Supcase_initials); |
dcfdbac7 JB |
438 | defsubr (&Supcase_region); |
439 | defsubr (&Sdowncase_region); | |
440 | defsubr (&Scapitalize_region); | |
8cef1f78 | 441 | defsubr (&Supcase_initials_region); |
dcfdbac7 JB |
442 | defsubr (&Supcase_word); |
443 | defsubr (&Sdowncase_word); | |
444 | defsubr (&Scapitalize_word); | |
445 | } | |
446 | ||
dfcf069d | 447 | void |
dcfdbac7 JB |
448 | keys_of_casefiddle () |
449 | { | |
450 | initial_define_key (control_x_map, Ctl('U'), "upcase-region"); | |
d427b66a | 451 | Fput (intern ("upcase-region"), Qdisabled, Qt); |
dcfdbac7 | 452 | initial_define_key (control_x_map, Ctl('L'), "downcase-region"); |
d427b66a JB |
453 | Fput (intern ("downcase-region"), Qdisabled, Qt); |
454 | ||
dcfdbac7 JB |
455 | initial_define_key (meta_map, 'u', "upcase-word"); |
456 | initial_define_key (meta_map, 'l', "downcase-word"); | |
457 | initial_define_key (meta_map, 'c', "capitalize-word"); | |
458 | } | |
6b61353c KH |
459 | |
460 | /* arch-tag: 60a73c66-5489-47e7-a81f-cead4057c526 | |
461 | (do not change this comment) */ |