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dcfdbac7 | 1 | /* GNU Emacs case conversion functions. |
4a2f9c6a | 2 | Copyright (C) 1985, 1994, 1997 Free Software Foundation, Inc. |
dcfdbac7 JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
7c938215 | 8 | the Free Software Foundation; either version 2, or (at your option) |
dcfdbac7 JB |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
dcfdbac7 JB |
20 | |
21 | ||
18160b98 | 22 | #include <config.h> |
dcfdbac7 JB |
23 | #include "lisp.h" |
24 | #include "buffer.h" | |
a04538da | 25 | #include "charset.h" |
dcfdbac7 JB |
26 | #include "commands.h" |
27 | #include "syntax.h" | |
28 | ||
29 | enum case_action {CASE_UP, CASE_DOWN, CASE_CAPITALIZE, CASE_CAPITALIZE_UP}; | |
a04538da KH |
30 | |
31 | Lisp_Object Qidentity; | |
dcfdbac7 JB |
32 | \f |
33 | Lisp_Object | |
34 | casify_object (flag, obj) | |
35 | enum case_action flag; | |
36 | Lisp_Object obj; | |
37 | { | |
38 | register int i, c, len; | |
39 | register int inword = flag == CASE_DOWN; | |
a04538da | 40 | Lisp_Object tem; |
dcfdbac7 | 41 | |
bd47bd35 RS |
42 | /* If the case table is flagged as modified, rescan it. */ |
43 | if (NILP (XCHAR_TABLE (current_buffer->downcase_table)->extras[1])) | |
44 | Fset_case_table (current_buffer->downcase_table); | |
45 | ||
dcfdbac7 JB |
46 | while (1) |
47 | { | |
9d05e3d4 | 48 | if (INTEGERP (obj)) |
dcfdbac7 | 49 | { |
2e34157c | 50 | c = DOWNCASE (XFASTINT (obj)); |
5dd4d40a KH |
51 | if (inword) |
52 | XSETFASTINT (obj, c); | |
53 | else if (c == XFASTINT (obj)) | |
54 | { | |
2e34157c | 55 | c = UPCASE1 (XFASTINT (obj)); |
5dd4d40a KH |
56 | XSETFASTINT (obj, c); |
57 | } | |
dcfdbac7 JB |
58 | return obj; |
59 | } | |
5245463a | 60 | |
9d05e3d4 | 61 | if (STRINGP (obj)) |
dcfdbac7 | 62 | { |
5245463a | 63 | int multibyte = STRING_MULTIBYTE (obj); |
a0615d90 | 64 | |
dcfdbac7 | 65 | obj = Fcopy_sequence (obj); |
fc932ac6 | 66 | len = STRING_BYTES (XSTRING (obj)); |
5245463a RS |
67 | |
68 | /* Scan all single-byte characters from start of string. */ | |
69 | for (i = 0; i < len;) | |
dcfdbac7 JB |
70 | { |
71 | c = XSTRING (obj)->data[i]; | |
5245463a | 72 | |
a0615d90 KH |
73 | if (multibyte && c >= 0x80) |
74 | /* A multibyte character can't be handled in this | |
75 | simple loop. */ | |
76 | break; | |
96927ba4 | 77 | if (inword && flag != CASE_CAPITALIZE_UP) |
dcfdbac7 | 78 | c = DOWNCASE (c); |
96927ba4 RS |
79 | else if (!UPPERCASEP (c) |
80 | && (!inword || flag != CASE_CAPITALIZE_UP)) | |
dcfdbac7 | 81 | c = UPCASE1 (c); |
5245463a RS |
82 | /* If this char won't fit in a single-byte string. |
83 | fall out to the multibyte case. */ | |
84 | if (multibyte ? ! ASCII_BYTE_P (c) | |
85 | : ! SINGLE_BYTE_CHAR_P (c)) | |
86 | break; | |
87 | ||
dcfdbac7 | 88 | XSTRING (obj)->data[i] = c; |
96927ba4 | 89 | if ((int) flag >= (int) CASE_CAPITALIZE) |
dcfdbac7 | 90 | inword = SYNTAX (c) == Sword; |
5245463a | 91 | i++; |
dcfdbac7 | 92 | } |
5245463a RS |
93 | |
94 | /* If we didn't do the whole string as single-byte, | |
95 | scan the rest in a more complex way. */ | |
a0615d90 KH |
96 | if (i < len) |
97 | { | |
98 | /* The work is not yet finished because of a multibyte | |
99 | character just encountered. */ | |
5245463a | 100 | int fromlen, tolen, j = i, j_byte = i; |
a0615d90 KH |
101 | char *buf |
102 | = (char *) alloca ((len - i) * MAX_LENGTH_OF_MULTI_BYTE_FORM | |
103 | + i); | |
4c7b7eab | 104 | unsigned char *str, workbuf[4]; |
a0615d90 KH |
105 | |
106 | /* Copy data already handled. */ | |
107 | bcopy (XSTRING (obj)->data, buf, i); | |
108 | ||
5245463a | 109 | /* From now on, I counts bytes. */ |
a0615d90 KH |
110 | while (i < len) |
111 | { | |
112 | c = STRING_CHAR_AND_LENGTH (XSTRING (obj)->data + i, | |
113 | len - i, fromlen); | |
114 | if (inword && flag != CASE_CAPITALIZE_UP) | |
115 | c = DOWNCASE (c); | |
116 | else if (!UPPERCASEP (c) | |
117 | && (!inword || flag != CASE_CAPITALIZE_UP)) | |
118 | c = UPCASE1 (c); | |
119 | tolen = CHAR_STRING (c, workbuf, str); | |
5245463a | 120 | bcopy (str, buf + j_byte, tolen); |
a0615d90 | 121 | i += fromlen; |
5245463a RS |
122 | j++; |
123 | j_byte += tolen; | |
a0615d90 KH |
124 | if ((int) flag >= (int) CASE_CAPITALIZE) |
125 | inword = SYNTAX (c) == Sword; | |
126 | } | |
5245463a | 127 | obj = make_multibyte_string (buf, j, j_byte); |
a0615d90 | 128 | } |
dcfdbac7 JB |
129 | return obj; |
130 | } | |
b37902c8 | 131 | obj = wrong_type_argument (Qchar_or_string_p, obj); |
dcfdbac7 JB |
132 | } |
133 | } | |
134 | ||
135 | DEFUN ("upcase", Fupcase, Supcase, 1, 1, 0, | |
136 | "Convert argument to upper case and return that.\n\ | |
137 | The argument may be a character or string. The result has the same type.\n\ | |
8cef1f78 RS |
138 | The argument object is not altered--the value is a copy.\n\ |
139 | See also `capitalize', `downcase' and `upcase-initials'.") | |
dcfdbac7 JB |
140 | (obj) |
141 | Lisp_Object obj; | |
142 | { | |
143 | return casify_object (CASE_UP, obj); | |
144 | } | |
145 | ||
146 | DEFUN ("downcase", Fdowncase, Sdowncase, 1, 1, 0, | |
147 | "Convert argument to lower case and return that.\n\ | |
148 | The argument may be a character or string. The result has the same type.\n\ | |
8cef1f78 | 149 | The argument object is not altered--the value is a copy.") |
dcfdbac7 JB |
150 | (obj) |
151 | Lisp_Object obj; | |
152 | { | |
153 | return casify_object (CASE_DOWN, obj); | |
154 | } | |
155 | ||
156 | DEFUN ("capitalize", Fcapitalize, Scapitalize, 1, 1, 0, | |
157 | "Convert argument to capitalized form and return that.\n\ | |
158 | This means that each word's first character is upper case\n\ | |
159 | and the rest is lower case.\n\ | |
160 | The argument may be a character or string. The result has the same type.\n\ | |
8cef1f78 | 161 | The argument object is not altered--the value is a copy.") |
dcfdbac7 JB |
162 | (obj) |
163 | Lisp_Object obj; | |
164 | { | |
165 | return casify_object (CASE_CAPITALIZE, obj); | |
166 | } | |
96927ba4 | 167 | |
2371fad4 KH |
168 | /* Like Fcapitalize but change only the initials. */ |
169 | ||
8cef1f78 RS |
170 | DEFUN ("upcase-initials", Fupcase_initials, Supcase_initials, 1, 1, 0, |
171 | "Convert the initial of each word in the argument to upper case.\n\ | |
172 | Do not change the other letters of each word.\n\ | |
173 | The argument may be a character or string. The result has the same type.\n\ | |
174 | The argument object is not altered--the value is a copy.") | |
175 | (obj) | |
176 | Lisp_Object obj; | |
177 | { | |
178 | return casify_object (CASE_CAPITALIZE_UP, obj); | |
179 | } | |
dcfdbac7 JB |
180 | \f |
181 | /* flag is CASE_UP, CASE_DOWN or CASE_CAPITALIZE or CASE_CAPITALIZE_UP. | |
182 | b and e specify range of buffer to operate on. */ | |
183 | ||
184 | casify_region (flag, b, e) | |
185 | enum case_action flag; | |
186 | Lisp_Object b, e; | |
187 | { | |
188 | register int i; | |
189 | register int c; | |
190 | register int inword = flag == CASE_DOWN; | |
a0615d90 | 191 | register int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
2371fad4 | 192 | int start, end; |
4c7b7eab | 193 | int start_byte, end_byte; |
a04538da | 194 | Lisp_Object ch, downch, val; |
dcfdbac7 JB |
195 | |
196 | if (EQ (b, e)) | |
197 | /* Not modifying because nothing marked */ | |
198 | return; | |
199 | ||
bd47bd35 RS |
200 | /* If the case table is flagged as modified, rescan it. */ |
201 | if (NILP (XCHAR_TABLE (current_buffer->downcase_table)->extras[1])) | |
202 | Fset_case_table (current_buffer->downcase_table); | |
203 | ||
dcfdbac7 | 204 | validate_region (&b, &e); |
2371fad4 KH |
205 | start = XFASTINT (b); |
206 | end = XFASTINT (e); | |
207 | modify_region (current_buffer, start, end); | |
208 | record_change (start, end - start); | |
4c7b7eab RS |
209 | start_byte = CHAR_TO_BYTE (start); |
210 | end_byte = CHAR_TO_BYTE (end); | |
dcfdbac7 | 211 | |
4c7b7eab | 212 | for (i = start_byte; i < end_byte; i++) |
a04538da | 213 | { |
a0615d90 KH |
214 | c = FETCH_BYTE (i); |
215 | if (multibyte && c >= 0x80) | |
216 | /* A multibyte character can't be handled in this simple loop. */ | |
217 | break; | |
218 | if (inword && flag != CASE_CAPITALIZE_UP) | |
219 | c = DOWNCASE (c); | |
220 | else if (!UPPERCASEP (c) | |
221 | && (!inword || flag != CASE_CAPITALIZE_UP)) | |
222 | c = UPCASE1 (c); | |
223 | FETCH_BYTE (i) = c; | |
224 | if ((int) flag >= (int) CASE_CAPITALIZE) | |
225 | inword = SYNTAX (c) == Sword; | |
a04538da | 226 | } |
4c7b7eab | 227 | if (i < end_byte) |
dcfdbac7 | 228 | { |
a0615d90 KH |
229 | /* The work is not yet finished because of a multibyte character |
230 | just encountered. */ | |
4c7b7eab RS |
231 | int opoint = PT; |
232 | int opoint_byte = PT_BYTE; | |
233 | int c2; | |
a04538da | 234 | |
4c7b7eab | 235 | while (i < end_byte) |
a04538da | 236 | { |
a0615d90 KH |
237 | if ((c = FETCH_BYTE (i)) >= 0x80) |
238 | c = FETCH_MULTIBYTE_CHAR (i); | |
239 | c2 = c; | |
a04538da | 240 | if (inword && flag != CASE_CAPITALIZE_UP) |
a0615d90 KH |
241 | c2 = DOWNCASE (c); |
242 | else if (!UPPERCASEP (c) | |
a04538da | 243 | && (!inword || flag != CASE_CAPITALIZE_UP)) |
a0615d90 KH |
244 | c2 = UPCASE1 (c); |
245 | if (c != c2) | |
a04538da KH |
246 | { |
247 | int fromlen, tolen, j; | |
4c7b7eab | 248 | unsigned char workbuf[4], *str; |
a04538da | 249 | |
a04538da | 250 | /* Handle the most likely case */ |
a0615d90 KH |
251 | if (c < 0400 && c2 < 0400) |
252 | FETCH_BYTE (i) = c2; | |
a04538da | 253 | else if (fromlen = CHAR_STRING (c, workbuf, str), |
a0615d90 | 254 | tolen = CHAR_STRING (c2, workbuf, str), |
a04538da KH |
255 | fromlen == tolen) |
256 | { | |
257 | for (j = 0; j < tolen; ++j) | |
258 | FETCH_BYTE (i + j) = str[j]; | |
259 | } | |
260 | else | |
261 | { | |
262 | error ("Can't casify letters that change length"); | |
263 | #if 0 /* This is approximately what we'd like to be able to do here */ | |
264 | if (tolen < fromlen) | |
265 | del_range_1 (i + tolen, i + fromlen, 0); | |
266 | else if (tolen > fromlen) | |
267 | { | |
268 | TEMP_SET_PT (i + fromlen); | |
4c7b7eab | 269 | insert_1 (str + fromlen, tolen - fromlen, 1, 0, 0); |
a04538da KH |
270 | } |
271 | #endif | |
272 | } | |
273 | } | |
274 | if ((int) flag >= (int) CASE_CAPITALIZE) | |
a0615d90 | 275 | inword = SYNTAX (c2) == Sword; |
a04538da KH |
276 | INC_POS (i); |
277 | } | |
4c7b7eab | 278 | TEMP_SET_PT_BOTH (opoint, opoint_byte); |
dcfdbac7 JB |
279 | } |
280 | ||
2371fad4 | 281 | signal_after_change (start, end - start, end - start); |
dcfdbac7 JB |
282 | } |
283 | ||
284 | DEFUN ("upcase-region", Fupcase_region, Supcase_region, 2, 2, "r", | |
285 | "Convert the region to upper case. In programs, wants two arguments.\n\ | |
286 | These arguments specify the starting and ending character numbers of\n\ | |
287 | the region to operate on. When used as a command, the text between\n\ | |
288 | point and the mark is operated on.\n\ | |
289 | See also `capitalize-region'.") | |
8c22d56c EN |
290 | (beg, end) |
291 | Lisp_Object beg, end; | |
dcfdbac7 | 292 | { |
8c22d56c | 293 | casify_region (CASE_UP, beg, end); |
dcfdbac7 JB |
294 | return Qnil; |
295 | } | |
296 | ||
297 | DEFUN ("downcase-region", Fdowncase_region, Sdowncase_region, 2, 2, "r", | |
298 | "Convert the region to lower case. In programs, wants two arguments.\n\ | |
299 | These arguments specify the starting and ending character numbers of\n\ | |
300 | the region to operate on. When used as a command, the text between\n\ | |
301 | point and the mark is operated on.") | |
8c22d56c EN |
302 | (beg, end) |
303 | Lisp_Object beg, end; | |
dcfdbac7 | 304 | { |
8c22d56c | 305 | casify_region (CASE_DOWN, beg, end); |
dcfdbac7 JB |
306 | return Qnil; |
307 | } | |
308 | ||
309 | DEFUN ("capitalize-region", Fcapitalize_region, Scapitalize_region, 2, 2, "r", | |
310 | "Convert the region to capitalized form.\n\ | |
311 | Capitalized form means each word's first character is upper case\n\ | |
312 | and the rest of it is lower case.\n\ | |
313 | In programs, give two arguments, the starting and ending\n\ | |
314 | character positions to operate on.") | |
8c22d56c EN |
315 | (beg, end) |
316 | Lisp_Object beg, end; | |
dcfdbac7 | 317 | { |
8c22d56c | 318 | casify_region (CASE_CAPITALIZE, beg, end); |
dcfdbac7 JB |
319 | return Qnil; |
320 | } | |
321 | ||
2371fad4 KH |
322 | /* Like Fcapitalize_region but change only the initials. */ |
323 | ||
8cef1f78 RS |
324 | DEFUN ("upcase-initials-region", Fupcase_initials_region, |
325 | Supcase_initials_region, 2, 2, "r", | |
326 | "Upcase the initial of each word in the region.\n\ | |
327 | Subsequent letters of each word are not changed.\n\ | |
328 | In programs, give two arguments, the starting and ending\n\ | |
329 | character positions to operate on.") | |
8c22d56c EN |
330 | (beg, end) |
331 | Lisp_Object beg, end; | |
8cef1f78 | 332 | { |
8c22d56c | 333 | casify_region (CASE_CAPITALIZE_UP, beg, end); |
8cef1f78 RS |
334 | return Qnil; |
335 | } | |
dcfdbac7 JB |
336 | \f |
337 | Lisp_Object | |
34628a90 | 338 | operate_on_word (arg, newpoint) |
dcfdbac7 | 339 | Lisp_Object arg; |
34628a90 | 340 | int *newpoint; |
dcfdbac7 | 341 | { |
39fb55ff | 342 | Lisp_Object val; |
34628a90 | 343 | int farend; |
2371fad4 | 344 | int iarg; |
dcfdbac7 JB |
345 | |
346 | CHECK_NUMBER (arg, 0); | |
2371fad4 | 347 | iarg = XINT (arg); |
6ec8bbd2 | 348 | farend = scan_words (PT, iarg); |
dcfdbac7 | 349 | if (!farend) |
2371fad4 | 350 | farend = iarg > 0 ? ZV : BEGV; |
dcfdbac7 | 351 | |
6ec8bbd2 | 352 | *newpoint = PT > farend ? PT : farend; |
18e23fd0 | 353 | XSETFASTINT (val, farend); |
dcfdbac7 JB |
354 | |
355 | return val; | |
356 | } | |
357 | ||
358 | DEFUN ("upcase-word", Fupcase_word, Supcase_word, 1, 1, "p", | |
359 | "Convert following word (or ARG words) to upper case, moving over.\n\ | |
360 | With negative argument, convert previous words but do not move.\n\ | |
361 | See also `capitalize-word'.") | |
362 | (arg) | |
363 | Lisp_Object arg; | |
364 | { | |
34628a90 RS |
365 | Lisp_Object beg, end; |
366 | int newpoint; | |
6ec8bbd2 | 367 | XSETFASTINT (beg, PT); |
34628a90 RS |
368 | end = operate_on_word (arg, &newpoint); |
369 | casify_region (CASE_UP, beg, end); | |
370 | SET_PT (newpoint); | |
dcfdbac7 JB |
371 | return Qnil; |
372 | } | |
373 | ||
374 | DEFUN ("downcase-word", Fdowncase_word, Sdowncase_word, 1, 1, "p", | |
375 | "Convert following word (or ARG words) to lower case, moving over.\n\ | |
376 | With negative argument, convert previous words but do not move.") | |
377 | (arg) | |
378 | Lisp_Object arg; | |
379 | { | |
34628a90 RS |
380 | Lisp_Object beg, end; |
381 | int newpoint; | |
6ec8bbd2 | 382 | XSETFASTINT (beg, PT); |
34628a90 RS |
383 | end = operate_on_word (arg, &newpoint); |
384 | casify_region (CASE_DOWN, beg, end); | |
385 | SET_PT (newpoint); | |
dcfdbac7 JB |
386 | return Qnil; |
387 | } | |
388 | ||
389 | DEFUN ("capitalize-word", Fcapitalize_word, Scapitalize_word, 1, 1, "p", | |
390 | "Capitalize the following word (or ARG words), moving over.\n\ | |
391 | This gives the word(s) a first character in upper case\n\ | |
392 | and the rest lower case.\n\ | |
393 | With negative argument, capitalize previous words but do not move.") | |
394 | (arg) | |
395 | Lisp_Object arg; | |
396 | { | |
34628a90 RS |
397 | Lisp_Object beg, end; |
398 | int newpoint; | |
6ec8bbd2 | 399 | XSETFASTINT (beg, PT); |
34628a90 RS |
400 | end = operate_on_word (arg, &newpoint); |
401 | casify_region (CASE_CAPITALIZE, beg, end); | |
402 | SET_PT (newpoint); | |
dcfdbac7 JB |
403 | return Qnil; |
404 | } | |
405 | \f | |
406 | syms_of_casefiddle () | |
407 | { | |
a04538da KH |
408 | Qidentity = intern ("identity"); |
409 | staticpro (&Qidentity); | |
dcfdbac7 JB |
410 | defsubr (&Supcase); |
411 | defsubr (&Sdowncase); | |
412 | defsubr (&Scapitalize); | |
8cef1f78 | 413 | defsubr (&Supcase_initials); |
dcfdbac7 JB |
414 | defsubr (&Supcase_region); |
415 | defsubr (&Sdowncase_region); | |
416 | defsubr (&Scapitalize_region); | |
8cef1f78 | 417 | defsubr (&Supcase_initials_region); |
dcfdbac7 JB |
418 | defsubr (&Supcase_word); |
419 | defsubr (&Sdowncase_word); | |
420 | defsubr (&Scapitalize_word); | |
421 | } | |
422 | ||
423 | keys_of_casefiddle () | |
424 | { | |
425 | initial_define_key (control_x_map, Ctl('U'), "upcase-region"); | |
d427b66a | 426 | Fput (intern ("upcase-region"), Qdisabled, Qt); |
dcfdbac7 | 427 | initial_define_key (control_x_map, Ctl('L'), "downcase-region"); |
d427b66a JB |
428 | Fput (intern ("downcase-region"), Qdisabled, Qt); |
429 | ||
dcfdbac7 JB |
430 | initial_define_key (meta_map, 'u', "upcase-word"); |
431 | initial_define_key (meta_map, 'l', "downcase-word"); | |
432 | initial_define_key (meta_map, 'c', "capitalize-word"); | |
433 | } |