Commit | Line | Data |
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dcfdbac7 | 1 | /* GNU Emacs case conversion functions. |
95df8112 | 2 | |
acaf905b | 3 | Copyright (C) 1985, 1994, 1997-1999, 2001-2012 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 | { |
438eba3c SM |
85 | EMACS_INT i; |
86 | EMACS_INT 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 | { | |
114 | EMACS_INT i, i_byte, size = SCHARS (obj); | |
115 | int len; | |
438eba3c SM |
116 | USE_SAFE_ALLOCA; |
117 | unsigned char *dst, *o; | |
118 | /* Over-allocate by 12%: this is a minor overhead, but should be | |
119 | sufficient in 99.999% of the cases to avoid a reallocation. */ | |
120 | EMACS_INT o_size = SBYTES (obj) + SBYTES (obj) / 8 + MAX_MULTIBYTE_LENGTH; | |
121 | SAFE_ALLOCA (dst, void *, o_size); | |
122 | o = dst; | |
123 | ||
124 | for (i = i_byte = 0; i < size; i++, i_byte += len) | |
125 | { | |
126 | if ((o - dst) + MAX_MULTIBYTE_LENGTH > o_size) | |
127 | { /* Not enough space for the next char: grow the destination. */ | |
128 | unsigned char *old_dst = dst; | |
129 | o_size += o_size; /* Probably overkill, but extremely rare. */ | |
130 | SAFE_ALLOCA (dst, void *, o_size); | |
72af86bd | 131 | memcpy (dst, old_dst, o - old_dst); |
438eba3c | 132 | o = dst + (o - old_dst); |
a0615d90 | 133 | } |
62a6e103 | 134 | c = STRING_CHAR_AND_LENGTH (SDATA (obj) + i_byte, len); |
438eba3c | 135 | if (inword && flag != CASE_CAPITALIZE_UP) |
5da9919f PE |
136 | c = downcase (c); |
137 | else if (!uppercasep (c) | |
438eba3c | 138 | && (!inword || flag != CASE_CAPITALIZE_UP)) |
5da9919f | 139 | c = upcase1 (c); |
438eba3c SM |
140 | if ((int) flag >= (int) CASE_CAPITALIZE) |
141 | inword = (SYNTAX (c) == Sword); | |
142 | o += CHAR_STRING (c, o); | |
dcfdbac7 | 143 | } |
438eba3c | 144 | eassert (o - dst <= o_size); |
47ce90e4 | 145 | obj = make_multibyte_string ((char *) dst, size, o - dst); |
438eba3c | 146 | SAFE_FREE (); |
0d64f689 | 147 | return obj; |
dcfdbac7 JB |
148 | } |
149 | } | |
150 | ||
a7ca3326 | 151 | DEFUN ("upcase", Fupcase, Supcase, 1, 1, 0, |
fdb82f93 PJ |
152 | doc: /* Convert argument to upper case and return that. |
153 | The argument may be a character or string. The result has the same type. | |
154 | The argument object is not altered--the value is a copy. | |
155 | See also `capitalize', `downcase' and `upcase-initials'. */) | |
5842a27b | 156 | (Lisp_Object obj) |
dcfdbac7 JB |
157 | { |
158 | return casify_object (CASE_UP, obj); | |
159 | } | |
160 | ||
a7ca3326 | 161 | DEFUN ("downcase", Fdowncase, Sdowncase, 1, 1, 0, |
fdb82f93 PJ |
162 | doc: /* Convert argument to lower case and return that. |
163 | The argument may be a character or string. The result has the same type. | |
164 | The argument object is not altered--the value is a copy. */) | |
5842a27b | 165 | (Lisp_Object obj) |
dcfdbac7 JB |
166 | { |
167 | return casify_object (CASE_DOWN, obj); | |
168 | } | |
169 | ||
170 | DEFUN ("capitalize", Fcapitalize, Scapitalize, 1, 1, 0, | |
fdb82f93 PJ |
171 | doc: /* Convert argument to capitalized form and return that. |
172 | This means that each word's first character is upper case | |
173 | and the rest is lower case. | |
174 | The argument may be a character or string. The result has the same type. | |
175 | The argument object is not altered--the value is a copy. */) | |
5842a27b | 176 | (Lisp_Object obj) |
dcfdbac7 JB |
177 | { |
178 | return casify_object (CASE_CAPITALIZE, obj); | |
179 | } | |
96927ba4 | 180 | |
2371fad4 KH |
181 | /* Like Fcapitalize but change only the initials. */ |
182 | ||
a7ca3326 | 183 | DEFUN ("upcase-initials", Fupcase_initials, Supcase_initials, 1, 1, 0, |
fdb82f93 PJ |
184 | doc: /* Convert the initial of each word in the argument to upper case. |
185 | Do not change the other letters of each word. | |
186 | The argument may be a character or string. The result has the same type. | |
187 | The argument object is not altered--the value is a copy. */) | |
5842a27b | 188 | (Lisp_Object obj) |
8cef1f78 RS |
189 | { |
190 | return casify_object (CASE_CAPITALIZE_UP, obj); | |
191 | } | |
dcfdbac7 JB |
192 | \f |
193 | /* flag is CASE_UP, CASE_DOWN or CASE_CAPITALIZE or CASE_CAPITALIZE_UP. | |
194 | b and e specify range of buffer to operate on. */ | |
195 | ||
181aa2be | 196 | static void |
971de7fb | 197 | casify_region (enum case_action flag, Lisp_Object b, Lisp_Object e) |
dcfdbac7 | 198 | { |
dcfdbac7 JB |
199 | register int c; |
200 | register int inword = flag == CASE_DOWN; | |
4b4deea2 | 201 | register int multibyte = !NILP (BVAR (current_buffer, enable_multibyte_characters)); |
7927d8e3 | 202 | EMACS_INT start, end; |
79b73827 | 203 | EMACS_INT start_byte; |
e45a141a PE |
204 | |
205 | /* Position of first and last changes. */ | |
206 | EMACS_INT first = -1, last IF_LINT (= 0); | |
207 | ||
7927d8e3 SM |
208 | EMACS_INT opoint = PT; |
209 | EMACS_INT opoint_byte = PT_BYTE; | |
dcfdbac7 JB |
210 | |
211 | if (EQ (b, e)) | |
212 | /* Not modifying because nothing marked */ | |
213 | return; | |
214 | ||
bd47bd35 | 215 | /* If the case table is flagged as modified, rescan it. */ |
4b4deea2 TT |
216 | if (NILP (XCHAR_TABLE (BVAR (current_buffer, downcase_table))->extras[1])) |
217 | Fset_case_table (BVAR (current_buffer, downcase_table)); | |
bd47bd35 | 218 | |
dcfdbac7 | 219 | validate_region (&b, &e); |
2371fad4 KH |
220 | start = XFASTINT (b); |
221 | end = XFASTINT (e); | |
3e145152 | 222 | modify_region (current_buffer, start, end, 0); |
2371fad4 | 223 | record_change (start, end - start); |
4c7b7eab | 224 | start_byte = CHAR_TO_BYTE (start); |
dcfdbac7 | 225 | |
5e617bc2 | 226 | SETUP_BUFFER_SYNTAX_TABLE (); /* For syntax_prefix_flag_p. */ |
c785836d | 227 | |
2422e50a | 228 | while (start < end) |
a04538da | 229 | { |
2422e50a KH |
230 | int c2, len; |
231 | ||
232 | if (multibyte) | |
233 | { | |
234 | c = FETCH_MULTIBYTE_CHAR (start_byte); | |
235 | len = CHAR_BYTES (c); | |
236 | } | |
237 | else | |
238 | { | |
239 | c = FETCH_BYTE (start_byte); | |
240 | MAKE_CHAR_MULTIBYTE (c); | |
241 | len = 1; | |
242 | } | |
243 | c2 = c; | |
a0615d90 | 244 | if (inword && flag != CASE_CAPITALIZE_UP) |
5da9919f PE |
245 | c = downcase (c); |
246 | else if (!uppercasep (c) | |
a0615d90 | 247 | && (!inword || flag != CASE_CAPITALIZE_UP)) |
5da9919f | 248 | c = upcase1 (c); |
a0615d90 | 249 | if ((int) flag >= (int) CASE_CAPITALIZE) |
c5683ceb SM |
250 | inword = ((SYNTAX (c) == Sword) |
251 | && (inword || !syntax_prefix_flag_p (c))); | |
2422e50a | 252 | if (c != c2) |
a04538da | 253 | { |
7927d8e3 SM |
254 | last = start; |
255 | if (first < 0) | |
256 | first = start; | |
257 | ||
2422e50a KH |
258 | if (! multibyte) |
259 | { | |
260 | MAKE_CHAR_UNIBYTE (c); | |
261 | FETCH_BYTE (start_byte) = c; | |
262 | } | |
263 | else if (ASCII_CHAR_P (c2) && ASCII_CHAR_P (c)) | |
264 | FETCH_BYTE (start_byte) = c; | |
08588bfa | 265 | else |
a04538da | 266 | { |
08588bfa | 267 | int tolen = CHAR_BYTES (c); |
2422e50a | 268 | int j; |
66da2880 | 269 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
a04538da | 270 | |
2422e50a | 271 | CHAR_STRING (c, str); |
08588bfa KH |
272 | if (len == tolen) |
273 | { | |
274 | /* Length is unchanged. */ | |
275 | for (j = 0; j < len; ++j) | |
276 | FETCH_BYTE (start_byte + j) = str[j]; | |
277 | } | |
278 | else | |
279 | { | |
280 | /* Replace one character with the other, | |
281 | keeping text properties the same. */ | |
282 | replace_range_2 (start, start_byte, | |
283 | start + 1, start_byte + len, | |
47ce90e4 | 284 | (char *) str, 1, tolen, |
08588bfa KH |
285 | 0); |
286 | len = tolen; | |
287 | } | |
a04538da | 288 | } |
a04538da | 289 | } |
2422e50a KH |
290 | start++; |
291 | start_byte += len; | |
dcfdbac7 JB |
292 | } |
293 | ||
8f924df7 KH |
294 | if (PT != opoint) |
295 | TEMP_SET_PT_BOTH (opoint, opoint_byte); | |
296 | ||
7927d8e3 | 297 | if (first >= 0) |
66da2880 | 298 | { |
7927d8e3 SM |
299 | signal_after_change (first, last + 1 - first, last + 1 - first); |
300 | update_compositions (first, last + 1, CHECK_ALL); | |
66da2880 | 301 | } |
dcfdbac7 JB |
302 | } |
303 | ||
a7ca3326 | 304 | DEFUN ("upcase-region", Fupcase_region, Supcase_region, 2, 2, "r", |
fdb82f93 PJ |
305 | doc: /* Convert the region to upper case. In programs, wants two arguments. |
306 | These arguments specify the starting and ending character numbers of | |
307 | the region to operate on. When used as a command, the text between | |
308 | point and the mark is operated on. | |
309 | See also `capitalize-region'. */) | |
5842a27b | 310 | (Lisp_Object beg, Lisp_Object end) |
dcfdbac7 | 311 | { |
8c22d56c | 312 | casify_region (CASE_UP, beg, end); |
dcfdbac7 JB |
313 | return Qnil; |
314 | } | |
315 | ||
316 | DEFUN ("downcase-region", Fdowncase_region, Sdowncase_region, 2, 2, "r", | |
fdb82f93 PJ |
317 | doc: /* Convert the region to lower case. In programs, wants two arguments. |
318 | These arguments specify the starting and ending character numbers of | |
319 | the region to operate on. When used as a command, the text between | |
320 | point and the mark is operated on. */) | |
5842a27b | 321 | (Lisp_Object beg, Lisp_Object end) |
dcfdbac7 | 322 | { |
8c22d56c | 323 | casify_region (CASE_DOWN, beg, end); |
dcfdbac7 JB |
324 | return Qnil; |
325 | } | |
326 | ||
327 | DEFUN ("capitalize-region", Fcapitalize_region, Scapitalize_region, 2, 2, "r", | |
fdb82f93 PJ |
328 | doc: /* Convert the region to capitalized form. |
329 | Capitalized form means each word's first character is upper case | |
330 | and the rest of it is lower case. | |
331 | In programs, give two arguments, the starting and ending | |
332 | character positions to operate on. */) | |
5842a27b | 333 | (Lisp_Object beg, Lisp_Object end) |
dcfdbac7 | 334 | { |
8c22d56c | 335 | casify_region (CASE_CAPITALIZE, beg, end); |
dcfdbac7 JB |
336 | return Qnil; |
337 | } | |
338 | ||
2371fad4 KH |
339 | /* Like Fcapitalize_region but change only the initials. */ |
340 | ||
a7ca3326 | 341 | DEFUN ("upcase-initials-region", Fupcase_initials_region, |
8cef1f78 | 342 | Supcase_initials_region, 2, 2, "r", |
fdb82f93 PJ |
343 | doc: /* Upcase the initial of each word in the region. |
344 | Subsequent letters of each word are not changed. | |
345 | In programs, give two arguments, the starting and ending | |
346 | character positions to operate on. */) | |
5842a27b | 347 | (Lisp_Object beg, Lisp_Object end) |
8cef1f78 | 348 | { |
8c22d56c | 349 | casify_region (CASE_CAPITALIZE_UP, beg, end); |
8cef1f78 RS |
350 | return Qnil; |
351 | } | |
dcfdbac7 | 352 | \f |
438eba3c | 353 | static Lisp_Object |
971de7fb | 354 | operate_on_word (Lisp_Object arg, EMACS_INT *newpoint) |
dcfdbac7 | 355 | { |
39fb55ff | 356 | Lisp_Object val; |
4f3a2f8d EZ |
357 | EMACS_INT farend; |
358 | EMACS_INT iarg; | |
dcfdbac7 | 359 | |
b7826503 | 360 | CHECK_NUMBER (arg); |
2371fad4 | 361 | iarg = XINT (arg); |
6ec8bbd2 | 362 | farend = scan_words (PT, iarg); |
dcfdbac7 | 363 | if (!farend) |
2371fad4 | 364 | farend = iarg > 0 ? ZV : BEGV; |
dcfdbac7 | 365 | |
6ec8bbd2 | 366 | *newpoint = PT > farend ? PT : farend; |
18e23fd0 | 367 | XSETFASTINT (val, farend); |
dcfdbac7 JB |
368 | |
369 | return val; | |
370 | } | |
371 | ||
372 | DEFUN ("upcase-word", Fupcase_word, Supcase_word, 1, 1, "p", | |
fdb82f93 PJ |
373 | doc: /* Convert following word (or ARG words) to upper case, moving over. |
374 | With negative argument, convert previous words but do not move. | |
375 | See also `capitalize-word'. */) | |
5842a27b | 376 | (Lisp_Object arg) |
dcfdbac7 | 377 | { |
34628a90 | 378 | Lisp_Object beg, end; |
438eba3c | 379 | EMACS_INT newpoint; |
6ec8bbd2 | 380 | XSETFASTINT (beg, PT); |
34628a90 RS |
381 | end = operate_on_word (arg, &newpoint); |
382 | casify_region (CASE_UP, beg, end); | |
383 | SET_PT (newpoint); | |
dcfdbac7 JB |
384 | return Qnil; |
385 | } | |
386 | ||
387 | DEFUN ("downcase-word", Fdowncase_word, Sdowncase_word, 1, 1, "p", | |
fdb82f93 PJ |
388 | doc: /* Convert following word (or ARG words) to lower case, moving over. |
389 | With negative argument, convert previous words but do not move. */) | |
5842a27b | 390 | (Lisp_Object arg) |
dcfdbac7 | 391 | { |
34628a90 | 392 | Lisp_Object beg, end; |
438eba3c | 393 | EMACS_INT newpoint; |
6ec8bbd2 | 394 | XSETFASTINT (beg, PT); |
34628a90 RS |
395 | end = operate_on_word (arg, &newpoint); |
396 | casify_region (CASE_DOWN, beg, end); | |
397 | SET_PT (newpoint); | |
dcfdbac7 JB |
398 | return Qnil; |
399 | } | |
400 | ||
401 | DEFUN ("capitalize-word", Fcapitalize_word, Scapitalize_word, 1, 1, "p", | |
fdb82f93 PJ |
402 | doc: /* Capitalize the following word (or ARG words), moving over. |
403 | This gives the word(s) a first character in upper case | |
404 | and the rest lower case. | |
405 | With negative argument, capitalize previous words but do not move. */) | |
5842a27b | 406 | (Lisp_Object arg) |
dcfdbac7 | 407 | { |
34628a90 | 408 | Lisp_Object beg, end; |
438eba3c | 409 | EMACS_INT newpoint; |
6ec8bbd2 | 410 | XSETFASTINT (beg, PT); |
34628a90 RS |
411 | end = operate_on_word (arg, &newpoint); |
412 | casify_region (CASE_CAPITALIZE, beg, end); | |
413 | SET_PT (newpoint); | |
dcfdbac7 JB |
414 | return Qnil; |
415 | } | |
416 | \f | |
dfcf069d | 417 | void |
971de7fb | 418 | syms_of_casefiddle (void) |
dcfdbac7 | 419 | { |
cd3520a4 | 420 | DEFSYM (Qidentity, "identity"); |
dcfdbac7 JB |
421 | defsubr (&Supcase); |
422 | defsubr (&Sdowncase); | |
423 | defsubr (&Scapitalize); | |
8cef1f78 | 424 | defsubr (&Supcase_initials); |
dcfdbac7 JB |
425 | defsubr (&Supcase_region); |
426 | defsubr (&Sdowncase_region); | |
427 | defsubr (&Scapitalize_region); | |
8cef1f78 | 428 | defsubr (&Supcase_initials_region); |
dcfdbac7 JB |
429 | defsubr (&Supcase_word); |
430 | defsubr (&Sdowncase_word); | |
431 | defsubr (&Scapitalize_word); | |
432 | } | |
433 | ||
dfcf069d | 434 | void |
971de7fb | 435 | keys_of_casefiddle (void) |
dcfdbac7 | 436 | { |
5e617bc2 | 437 | initial_define_key (control_x_map, Ctl ('U'), "upcase-region"); |
d427b66a | 438 | Fput (intern ("upcase-region"), Qdisabled, Qt); |
5e617bc2 | 439 | initial_define_key (control_x_map, Ctl ('L'), "downcase-region"); |
d427b66a JB |
440 | Fput (intern ("downcase-region"), Qdisabled, Qt); |
441 | ||
dcfdbac7 JB |
442 | initial_define_key (meta_map, 'u', "upcase-word"); |
443 | initial_define_key (meta_map, 'l', "downcase-word"); | |
444 | initial_define_key (meta_map, 'c', "capitalize-word"); | |
445 | } |