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dcfdbac7 | 1 | /* GNU Emacs case conversion functions. |
95df8112 GM |
2 | |
3 | Copyright (C) 1985, 1994, 1997-1999, 2001-2011 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 | 34 | \f |
181aa2be | 35 | static Lisp_Object |
971de7fb | 36 | casify_object (enum case_action flag, Lisp_Object obj) |
dcfdbac7 | 37 | { |
2422e50a | 38 | register int c, c1; |
dcfdbac7 JB |
39 | register int inword = flag == CASE_DOWN; |
40 | ||
bd47bd35 | 41 | /* If the case table is flagged as modified, rescan it. */ |
4b4deea2 TT |
42 | if (NILP (XCHAR_TABLE (BVAR (current_buffer, downcase_table))->extras[1])) |
43 | Fset_case_table (BVAR (current_buffer, downcase_table)); | |
bd47bd35 | 44 | |
0d64f689 | 45 | if (INTEGERP (obj)) |
dcfdbac7 | 46 | { |
0d64f689 KH |
47 | int flagbits = (CHAR_ALT | CHAR_SUPER | CHAR_HYPER |
48 | | CHAR_SHIFT | CHAR_CTL | CHAR_META); | |
49 | int flags = XINT (obj) & flagbits; | |
4b4deea2 | 50 | int multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
0d64f689 KH |
51 | |
52 | /* If the character has higher bits set | |
53 | above the flags, return it unchanged. | |
54 | It is not a real character. */ | |
ea204efb | 55 | if (UNSIGNED_CMP (XFASTINT (obj), >, flagbits)) |
0d64f689 KH |
56 | return obj; |
57 | ||
58 | c1 = XFASTINT (obj) & ~flagbits; | |
1fb5aad7 SM |
59 | /* FIXME: Even if enable-multibyte-characters is nil, we may |
60 | manipulate multibyte chars. This means we have a bug for latin-1 | |
61 | chars since when we receive an int 128-255 we can't tell whether | |
62 | it's an eight-bit byte or a latin-1 char. */ | |
63 | if (c1 >= 256) | |
64 | multibyte = 1; | |
0d64f689 KH |
65 | if (! multibyte) |
66 | MAKE_CHAR_MULTIBYTE (c1); | |
5da9919f | 67 | c = downcase (c1); |
0d64f689 KH |
68 | if (inword) |
69 | XSETFASTINT (obj, c | flags); | |
70 | else if (c == (XFASTINT (obj) & ~flagbits)) | |
dcfdbac7 | 71 | { |
0d64f689 | 72 | if (! inword) |
5da9919f | 73 | c = upcase1 (c1); |
2422e50a | 74 | if (! multibyte) |
0d64f689 KH |
75 | MAKE_CHAR_UNIBYTE (c); |
76 | XSETFASTINT (obj, c | flags); | |
dcfdbac7 | 77 | } |
0d64f689 KH |
78 | return obj; |
79 | } | |
5245463a | 80 | |
438eba3c SM |
81 | if (!STRINGP (obj)) |
82 | wrong_type_argument (Qchar_or_string_p, obj); | |
83 | else if (!STRING_MULTIBYTE (obj)) | |
0d64f689 | 84 | { |
d311d28c PE |
85 | ptrdiff_t i; |
86 | ptrdiff_t size = SCHARS (obj); | |
a0615d90 | 87 | |
0d64f689 | 88 | obj = Fcopy_sequence (obj); |
438eba3c | 89 | for (i = 0; i < size; i++) |
0d64f689 | 90 | { |
438eba3c | 91 | c = SREF (obj, i); |
4c0354d7 | 92 | MAKE_CHAR_MULTIBYTE (c); |
0d64f689 KH |
93 | c1 = c; |
94 | if (inword && flag != CASE_CAPITALIZE_UP) | |
5da9919f PE |
95 | c = downcase (c); |
96 | else if (!uppercasep (c) | |
0d64f689 | 97 | && (!inword || flag != CASE_CAPITALIZE_UP)) |
5da9919f | 98 | c = upcase1 (c1); |
0d64f689 KH |
99 | if ((int) flag >= (int) CASE_CAPITALIZE) |
100 | inword = (SYNTAX (c) == Sword); | |
101 | if (c != c1) | |
102 | { | |
0d64f689 | 103 | MAKE_CHAR_UNIBYTE (c); |
438eba3c SM |
104 | /* If the char can't be converted to a valid byte, just don't |
105 | change it. */ | |
106 | if (c >= 0 && c < 256) | |
107 | SSET (obj, i, c); | |
108 | } | |
109 | } | |
110 | return obj; | |
994b75e0 SM |
111 | } |
112 | else | |
113 | { | |
d311d28c | 114 | ptrdiff_t i, i_byte, size = SCHARS (obj); |
994b75e0 | 115 | int len; |
438eba3c SM |
116 | USE_SAFE_ALLOCA; |
117 | unsigned char *dst, *o; | |
d311d28c PE |
118 | ptrdiff_t o_size = (size < STRING_BYTES_BOUND / MAX_MULTIBYTE_LENGTH |
119 | ? size * MAX_MULTIBYTE_LENGTH | |
120 | : STRING_BYTES_BOUND); | |
438eba3c SM |
121 | SAFE_ALLOCA (dst, void *, o_size); |
122 | o = dst; | |
123 | ||
124 | for (i = i_byte = 0; i < size; i++, i_byte += len) | |
125 | { | |
d311d28c PE |
126 | if (o_size - (o - dst) < MAX_MULTIBYTE_LENGTH) |
127 | string_overflow (); | |
62a6e103 | 128 | c = STRING_CHAR_AND_LENGTH (SDATA (obj) + i_byte, len); |
438eba3c | 129 | if (inword && flag != CASE_CAPITALIZE_UP) |
5da9919f PE |
130 | c = downcase (c); |
131 | else if (!uppercasep (c) | |
438eba3c | 132 | && (!inword || flag != CASE_CAPITALIZE_UP)) |
5da9919f | 133 | c = upcase1 (c); |
438eba3c SM |
134 | if ((int) flag >= (int) CASE_CAPITALIZE) |
135 | inword = (SYNTAX (c) == Sword); | |
136 | o += CHAR_STRING (c, o); | |
dcfdbac7 | 137 | } |
438eba3c | 138 | eassert (o - dst <= o_size); |
47ce90e4 | 139 | obj = make_multibyte_string ((char *) dst, size, o - dst); |
438eba3c | 140 | SAFE_FREE (); |
0d64f689 | 141 | return obj; |
dcfdbac7 JB |
142 | } |
143 | } | |
144 | ||
a7ca3326 | 145 | DEFUN ("upcase", Fupcase, Supcase, 1, 1, 0, |
fdb82f93 PJ |
146 | doc: /* Convert argument to upper case and return that. |
147 | The argument may be a character or string. The result has the same type. | |
148 | The argument object is not altered--the value is a copy. | |
149 | See also `capitalize', `downcase' and `upcase-initials'. */) | |
5842a27b | 150 | (Lisp_Object obj) |
dcfdbac7 JB |
151 | { |
152 | return casify_object (CASE_UP, obj); | |
153 | } | |
154 | ||
a7ca3326 | 155 | DEFUN ("downcase", Fdowncase, Sdowncase, 1, 1, 0, |
fdb82f93 PJ |
156 | doc: /* Convert argument to lower case and return that. |
157 | The argument may be a character or string. The result has the same type. | |
158 | The argument object is not altered--the value is a copy. */) | |
5842a27b | 159 | (Lisp_Object obj) |
dcfdbac7 JB |
160 | { |
161 | return casify_object (CASE_DOWN, obj); | |
162 | } | |
163 | ||
164 | DEFUN ("capitalize", Fcapitalize, Scapitalize, 1, 1, 0, | |
fdb82f93 PJ |
165 | doc: /* Convert argument to capitalized form and return that. |
166 | This means that each word's first character is upper case | |
167 | and the rest is lower case. | |
168 | The argument may be a character or string. The result has the same type. | |
169 | The argument object is not altered--the value is a copy. */) | |
5842a27b | 170 | (Lisp_Object obj) |
dcfdbac7 JB |
171 | { |
172 | return casify_object (CASE_CAPITALIZE, obj); | |
173 | } | |
96927ba4 | 174 | |
2371fad4 KH |
175 | /* Like Fcapitalize but change only the initials. */ |
176 | ||
a7ca3326 | 177 | DEFUN ("upcase-initials", Fupcase_initials, Supcase_initials, 1, 1, 0, |
fdb82f93 PJ |
178 | doc: /* Convert the initial of each word in the argument to upper case. |
179 | Do not change the other letters of each word. | |
180 | The argument may be a character or string. The result has the same type. | |
181 | The argument object is not altered--the value is a copy. */) | |
5842a27b | 182 | (Lisp_Object obj) |
8cef1f78 RS |
183 | { |
184 | return casify_object (CASE_CAPITALIZE_UP, obj); | |
185 | } | |
dcfdbac7 JB |
186 | \f |
187 | /* flag is CASE_UP, CASE_DOWN or CASE_CAPITALIZE or CASE_CAPITALIZE_UP. | |
188 | b and e specify range of buffer to operate on. */ | |
189 | ||
181aa2be | 190 | static void |
971de7fb | 191 | casify_region (enum case_action flag, Lisp_Object b, Lisp_Object e) |
dcfdbac7 | 192 | { |
dcfdbac7 JB |
193 | register int c; |
194 | register int inword = flag == CASE_DOWN; | |
4b4deea2 | 195 | register int multibyte = !NILP (BVAR (current_buffer, enable_multibyte_characters)); |
d311d28c PE |
196 | ptrdiff_t start, end; |
197 | ptrdiff_t start_byte; | |
e45a141a PE |
198 | |
199 | /* Position of first and last changes. */ | |
d311d28c | 200 | ptrdiff_t first = -1, last IF_LINT (= 0); |
e45a141a | 201 | |
d311d28c PE |
202 | ptrdiff_t opoint = PT; |
203 | ptrdiff_t opoint_byte = PT_BYTE; | |
dcfdbac7 JB |
204 | |
205 | if (EQ (b, e)) | |
206 | /* Not modifying because nothing marked */ | |
207 | return; | |
208 | ||
bd47bd35 | 209 | /* If the case table is flagged as modified, rescan it. */ |
4b4deea2 TT |
210 | if (NILP (XCHAR_TABLE (BVAR (current_buffer, downcase_table))->extras[1])) |
211 | Fset_case_table (BVAR (current_buffer, downcase_table)); | |
bd47bd35 | 212 | |
dcfdbac7 | 213 | validate_region (&b, &e); |
2371fad4 KH |
214 | start = XFASTINT (b); |
215 | end = XFASTINT (e); | |
3e145152 | 216 | modify_region (current_buffer, start, end, 0); |
2371fad4 | 217 | record_change (start, end - start); |
4c7b7eab | 218 | start_byte = CHAR_TO_BYTE (start); |
dcfdbac7 | 219 | |
5e617bc2 | 220 | SETUP_BUFFER_SYNTAX_TABLE (); /* For syntax_prefix_flag_p. */ |
c785836d | 221 | |
2422e50a | 222 | while (start < end) |
a04538da | 223 | { |
2422e50a KH |
224 | int c2, len; |
225 | ||
226 | if (multibyte) | |
227 | { | |
228 | c = FETCH_MULTIBYTE_CHAR (start_byte); | |
229 | len = CHAR_BYTES (c); | |
230 | } | |
231 | else | |
232 | { | |
233 | c = FETCH_BYTE (start_byte); | |
234 | MAKE_CHAR_MULTIBYTE (c); | |
235 | len = 1; | |
236 | } | |
237 | c2 = c; | |
a0615d90 | 238 | if (inword && flag != CASE_CAPITALIZE_UP) |
5da9919f PE |
239 | c = downcase (c); |
240 | else if (!uppercasep (c) | |
a0615d90 | 241 | && (!inword || flag != CASE_CAPITALIZE_UP)) |
5da9919f | 242 | c = upcase1 (c); |
a0615d90 | 243 | if ((int) flag >= (int) CASE_CAPITALIZE) |
c5683ceb SM |
244 | inword = ((SYNTAX (c) == Sword) |
245 | && (inword || !syntax_prefix_flag_p (c))); | |
2422e50a | 246 | if (c != c2) |
a04538da | 247 | { |
7927d8e3 SM |
248 | last = start; |
249 | if (first < 0) | |
250 | first = start; | |
251 | ||
2422e50a KH |
252 | if (! multibyte) |
253 | { | |
254 | MAKE_CHAR_UNIBYTE (c); | |
255 | FETCH_BYTE (start_byte) = c; | |
256 | } | |
257 | else if (ASCII_CHAR_P (c2) && ASCII_CHAR_P (c)) | |
258 | FETCH_BYTE (start_byte) = c; | |
08588bfa | 259 | else |
a04538da | 260 | { |
08588bfa | 261 | int tolen = CHAR_BYTES (c); |
2422e50a | 262 | int j; |
66da2880 | 263 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
a04538da | 264 | |
2422e50a | 265 | CHAR_STRING (c, str); |
08588bfa KH |
266 | if (len == tolen) |
267 | { | |
268 | /* Length is unchanged. */ | |
269 | for (j = 0; j < len; ++j) | |
270 | FETCH_BYTE (start_byte + j) = str[j]; | |
271 | } | |
272 | else | |
273 | { | |
274 | /* Replace one character with the other, | |
275 | keeping text properties the same. */ | |
276 | replace_range_2 (start, start_byte, | |
277 | start + 1, start_byte + len, | |
47ce90e4 | 278 | (char *) str, 1, tolen, |
08588bfa KH |
279 | 0); |
280 | len = tolen; | |
281 | } | |
a04538da | 282 | } |
a04538da | 283 | } |
2422e50a KH |
284 | start++; |
285 | start_byte += len; | |
dcfdbac7 JB |
286 | } |
287 | ||
8f924df7 KH |
288 | if (PT != opoint) |
289 | TEMP_SET_PT_BOTH (opoint, opoint_byte); | |
290 | ||
7927d8e3 | 291 | if (first >= 0) |
66da2880 | 292 | { |
7927d8e3 SM |
293 | signal_after_change (first, last + 1 - first, last + 1 - first); |
294 | update_compositions (first, last + 1, CHECK_ALL); | |
66da2880 | 295 | } |
dcfdbac7 JB |
296 | } |
297 | ||
a7ca3326 | 298 | DEFUN ("upcase-region", Fupcase_region, Supcase_region, 2, 2, "r", |
fdb82f93 PJ |
299 | doc: /* Convert the region to upper case. In programs, wants two arguments. |
300 | These arguments specify the starting and ending character numbers of | |
301 | the region to operate on. When used as a command, the text between | |
302 | point and the mark is operated on. | |
303 | See also `capitalize-region'. */) | |
5842a27b | 304 | (Lisp_Object beg, Lisp_Object end) |
dcfdbac7 | 305 | { |
8c22d56c | 306 | casify_region (CASE_UP, beg, end); |
dcfdbac7 JB |
307 | return Qnil; |
308 | } | |
309 | ||
310 | DEFUN ("downcase-region", Fdowncase_region, Sdowncase_region, 2, 2, "r", | |
fdb82f93 PJ |
311 | doc: /* Convert the region to lower case. In programs, wants two arguments. |
312 | These arguments specify the starting and ending character numbers of | |
313 | the region to operate on. When used as a command, the text between | |
314 | point and the mark is operated on. */) | |
5842a27b | 315 | (Lisp_Object beg, Lisp_Object end) |
dcfdbac7 | 316 | { |
8c22d56c | 317 | casify_region (CASE_DOWN, beg, end); |
dcfdbac7 JB |
318 | return Qnil; |
319 | } | |
320 | ||
321 | DEFUN ("capitalize-region", Fcapitalize_region, Scapitalize_region, 2, 2, "r", | |
fdb82f93 PJ |
322 | doc: /* Convert the region to capitalized form. |
323 | Capitalized form means each word's first character is upper case | |
324 | and the rest of it is lower case. | |
325 | In programs, give two arguments, the starting and ending | |
326 | character positions to operate on. */) | |
5842a27b | 327 | (Lisp_Object beg, Lisp_Object end) |
dcfdbac7 | 328 | { |
8c22d56c | 329 | casify_region (CASE_CAPITALIZE, beg, end); |
dcfdbac7 JB |
330 | return Qnil; |
331 | } | |
332 | ||
2371fad4 KH |
333 | /* Like Fcapitalize_region but change only the initials. */ |
334 | ||
a7ca3326 | 335 | DEFUN ("upcase-initials-region", Fupcase_initials_region, |
8cef1f78 | 336 | Supcase_initials_region, 2, 2, "r", |
fdb82f93 PJ |
337 | doc: /* Upcase the initial of each word in the region. |
338 | Subsequent letters of each word are not changed. | |
339 | In programs, give two arguments, the starting and ending | |
340 | character positions to operate on. */) | |
5842a27b | 341 | (Lisp_Object beg, Lisp_Object end) |
8cef1f78 | 342 | { |
8c22d56c | 343 | casify_region (CASE_CAPITALIZE_UP, beg, end); |
8cef1f78 RS |
344 | return Qnil; |
345 | } | |
dcfdbac7 | 346 | \f |
438eba3c | 347 | static Lisp_Object |
d311d28c | 348 | operate_on_word (Lisp_Object arg, ptrdiff_t *newpoint) |
dcfdbac7 | 349 | { |
39fb55ff | 350 | Lisp_Object val; |
d311d28c | 351 | ptrdiff_t farend; |
4f3a2f8d | 352 | EMACS_INT iarg; |
dcfdbac7 | 353 | |
b7826503 | 354 | CHECK_NUMBER (arg); |
2371fad4 | 355 | iarg = XINT (arg); |
6ec8bbd2 | 356 | farend = scan_words (PT, iarg); |
dcfdbac7 | 357 | if (!farend) |
2371fad4 | 358 | farend = iarg > 0 ? ZV : BEGV; |
dcfdbac7 | 359 | |
6ec8bbd2 | 360 | *newpoint = PT > farend ? PT : farend; |
18e23fd0 | 361 | XSETFASTINT (val, farend); |
dcfdbac7 JB |
362 | |
363 | return val; | |
364 | } | |
365 | ||
366 | DEFUN ("upcase-word", Fupcase_word, Supcase_word, 1, 1, "p", | |
fdb82f93 PJ |
367 | doc: /* Convert following word (or ARG words) to upper case, moving over. |
368 | With negative argument, convert previous words but do not move. | |
369 | See also `capitalize-word'. */) | |
5842a27b | 370 | (Lisp_Object arg) |
dcfdbac7 | 371 | { |
34628a90 | 372 | Lisp_Object beg, end; |
d311d28c | 373 | ptrdiff_t newpoint; |
6ec8bbd2 | 374 | XSETFASTINT (beg, PT); |
34628a90 RS |
375 | end = operate_on_word (arg, &newpoint); |
376 | casify_region (CASE_UP, beg, end); | |
377 | SET_PT (newpoint); | |
dcfdbac7 JB |
378 | return Qnil; |
379 | } | |
380 | ||
381 | DEFUN ("downcase-word", Fdowncase_word, Sdowncase_word, 1, 1, "p", | |
fdb82f93 PJ |
382 | doc: /* Convert following word (or ARG words) to lower case, moving over. |
383 | With negative argument, convert previous words but do not move. */) | |
5842a27b | 384 | (Lisp_Object arg) |
dcfdbac7 | 385 | { |
34628a90 | 386 | Lisp_Object beg, end; |
d311d28c | 387 | ptrdiff_t newpoint; |
6ec8bbd2 | 388 | XSETFASTINT (beg, PT); |
34628a90 RS |
389 | end = operate_on_word (arg, &newpoint); |
390 | casify_region (CASE_DOWN, beg, end); | |
391 | SET_PT (newpoint); | |
dcfdbac7 JB |
392 | return Qnil; |
393 | } | |
394 | ||
395 | DEFUN ("capitalize-word", Fcapitalize_word, Scapitalize_word, 1, 1, "p", | |
fdb82f93 PJ |
396 | doc: /* Capitalize the following word (or ARG words), moving over. |
397 | This gives the word(s) a first character in upper case | |
398 | and the rest lower case. | |
399 | With negative argument, capitalize previous words but do not move. */) | |
5842a27b | 400 | (Lisp_Object arg) |
dcfdbac7 | 401 | { |
34628a90 | 402 | Lisp_Object beg, end; |
d311d28c | 403 | ptrdiff_t newpoint; |
6ec8bbd2 | 404 | XSETFASTINT (beg, PT); |
34628a90 RS |
405 | end = operate_on_word (arg, &newpoint); |
406 | casify_region (CASE_CAPITALIZE, beg, end); | |
407 | SET_PT (newpoint); | |
dcfdbac7 JB |
408 | return Qnil; |
409 | } | |
410 | \f | |
dfcf069d | 411 | void |
971de7fb | 412 | syms_of_casefiddle (void) |
dcfdbac7 | 413 | { |
cd3520a4 | 414 | DEFSYM (Qidentity, "identity"); |
dcfdbac7 JB |
415 | defsubr (&Supcase); |
416 | defsubr (&Sdowncase); | |
417 | defsubr (&Scapitalize); | |
8cef1f78 | 418 | defsubr (&Supcase_initials); |
dcfdbac7 JB |
419 | defsubr (&Supcase_region); |
420 | defsubr (&Sdowncase_region); | |
421 | defsubr (&Scapitalize_region); | |
8cef1f78 | 422 | defsubr (&Supcase_initials_region); |
dcfdbac7 JB |
423 | defsubr (&Supcase_word); |
424 | defsubr (&Sdowncase_word); | |
425 | defsubr (&Scapitalize_word); | |
426 | } | |
427 | ||
dfcf069d | 428 | void |
971de7fb | 429 | keys_of_casefiddle (void) |
dcfdbac7 | 430 | { |
5e617bc2 | 431 | initial_define_key (control_x_map, Ctl ('U'), "upcase-region"); |
d427b66a | 432 | Fput (intern ("upcase-region"), Qdisabled, Qt); |
5e617bc2 | 433 | initial_define_key (control_x_map, Ctl ('L'), "downcase-region"); |
d427b66a JB |
434 | Fput (intern ("downcase-region"), Qdisabled, Qt); |
435 | ||
dcfdbac7 JB |
436 | initial_define_key (meta_map, 'u', "upcase-word"); |
437 | initial_define_key (meta_map, 'l', "downcase-word"); | |
438 | initial_define_key (meta_map, 'c', "capitalize-word"); | |
439 | } |