1 /* GNU Emacs case conversion functions.
2 Copyright (C) 1985,94,97,98,99, 2001, 2002, 2004
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
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.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
29 #include "composite.h"
32 enum case_action
{CASE_UP
, CASE_DOWN
, CASE_CAPITALIZE
, CASE_CAPITALIZE_UP
};
34 Lisp_Object Qidentity
;
37 casify_object (flag
, obj
)
38 enum case_action flag
;
41 register int i
, c
, len
;
42 register int inword
= flag
== CASE_DOWN
;
44 /* If the case table is flagged as modified, rescan it. */
45 if (NILP (XCHAR_TABLE (current_buffer
->downcase_table
)->extras
[1]))
46 Fset_case_table (current_buffer
->downcase_table
);
52 int flagbits
= (CHAR_ALT
| CHAR_SUPER
| CHAR_HYPER
53 | CHAR_SHIFT
| CHAR_CTL
| CHAR_META
);
54 int flags
= XINT (obj
) & flagbits
;
56 /* If the character has higher bits set
57 above the flags, return it unchanged.
58 It is not a real character. */
59 if ((unsigned) XFASTINT (obj
) > (unsigned) flagbits
)
62 c
= DOWNCASE (XFASTINT (obj
) & ~flagbits
);
64 XSETFASTINT (obj
, c
| flags
);
65 else if (c
== (XFASTINT (obj
) & ~flagbits
))
67 c
= UPCASE1 ((XFASTINT (obj
) & ~flagbits
));
68 XSETFASTINT (obj
, c
| flags
);
75 int multibyte
= STRING_MULTIBYTE (obj
);
77 obj
= Fcopy_sequence (obj
);
80 /* Scan all single-byte characters from start of string. */
85 if (multibyte
&& c
>= 0x80)
86 /* A multibyte character can't be handled in this
89 if (inword
&& flag
!= CASE_CAPITALIZE_UP
)
91 else if (!UPPERCASEP (c
)
92 && (!inword
|| flag
!= CASE_CAPITALIZE_UP
))
94 /* If this char won't fit in a single-byte string.
95 fall out to the multibyte case. */
96 if (multibyte
? ! ASCII_BYTE_P (c
)
97 : ! SINGLE_BYTE_CHAR_P (c
))
101 if ((int) flag
>= (int) CASE_CAPITALIZE
)
102 inword
= SYNTAX (c
) == Sword
;
106 /* If we didn't do the whole string as single-byte,
107 scan the rest in a more complex way. */
110 /* The work is not yet finished because of a multibyte
111 character just encountered. */
112 int fromlen
, j_byte
= i
;
114 = (char *) alloca ((len
- i
) * MAX_MULTIBYTE_LENGTH
+ i
);
116 /* Copy data already handled. */
117 bcopy (SDATA (obj
), buf
, i
);
119 /* From now on, I counts bytes. */
122 c
= STRING_CHAR_AND_LENGTH (SDATA (obj
) + i
,
124 if (inword
&& flag
!= CASE_CAPITALIZE_UP
)
126 else if (!UPPERCASEP (c
)
127 && (!inword
|| flag
!= CASE_CAPITALIZE_UP
))
130 j_byte
+= CHAR_STRING (c
, buf
+ j_byte
);
131 if ((int) flag
>= (int) CASE_CAPITALIZE
)
132 inword
= SYNTAX (c
) == Sword
;
134 obj
= make_multibyte_string (buf
, SCHARS (obj
),
139 obj
= wrong_type_argument (Qchar_or_string_p
, obj
);
143 DEFUN ("upcase", Fupcase
, Supcase
, 1, 1, 0,
144 doc
: /* Convert argument to upper case and return that.
145 The argument may be a character or string. The result has the same type.
146 The argument object is not altered--the value is a copy.
147 See also `capitalize', `downcase' and `upcase-initials'. */)
151 return casify_object (CASE_UP
, obj
);
154 DEFUN ("downcase", Fdowncase
, Sdowncase
, 1, 1, 0,
155 doc
: /* Convert argument to lower case and return that.
156 The argument may be a character or string. The result has the same type.
157 The argument object is not altered--the value is a copy. */)
161 return casify_object (CASE_DOWN
, obj
);
164 DEFUN ("capitalize", Fcapitalize
, Scapitalize
, 1, 1, 0,
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. */)
173 return casify_object (CASE_CAPITALIZE
, obj
);
176 /* Like Fcapitalize but change only the initials. */
178 DEFUN ("upcase-initials", Fupcase_initials
, Supcase_initials
, 1, 1, 0,
179 doc
: /* Convert the initial of each word in the argument to upper case.
180 Do not change the other letters of each word.
181 The argument may be a character or string. The result has the same type.
182 The argument object is not altered--the value is a copy. */)
186 return casify_object (CASE_CAPITALIZE_UP
, obj
);
189 /* flag is CASE_UP, CASE_DOWN or CASE_CAPITALIZE or CASE_CAPITALIZE_UP.
190 b and e specify range of buffer to operate on. */
193 casify_region (flag
, b
, e
)
194 enum case_action flag
;
199 register int inword
= flag
== CASE_DOWN
;
200 register int multibyte
= !NILP (current_buffer
->enable_multibyte_characters
);
202 int start_byte
, end_byte
;
206 /* Not modifying because nothing marked */
209 /* If the case table is flagged as modified, rescan it. */
210 if (NILP (XCHAR_TABLE (current_buffer
->downcase_table
)->extras
[1]))
211 Fset_case_table (current_buffer
->downcase_table
);
213 validate_region (&b
, &e
);
214 start
= XFASTINT (b
);
216 modify_region (current_buffer
, start
, end
);
217 record_change (start
, end
- start
);
218 start_byte
= CHAR_TO_BYTE (start
);
219 end_byte
= CHAR_TO_BYTE (end
);
221 for (i
= start_byte
; i
< end_byte
; i
++, start
++)
224 c
= c2
= FETCH_BYTE (i
);
225 if (multibyte
&& c
>= 0x80)
226 /* A multibyte character can't be handled in this simple loop. */
228 if (inword
&& flag
!= CASE_CAPITALIZE_UP
)
230 else if (!UPPERCASEP (c
)
231 && (!inword
|| flag
!= CASE_CAPITALIZE_UP
))
236 if ((int) flag
>= (int) CASE_CAPITALIZE
)
237 inword
= SYNTAX (c
) == Sword
&& (inword
|| !SYNTAX_PREFIX (c
));
241 /* The work is not yet finished because of a multibyte character
244 int opoint_byte
= PT_BYTE
;
249 if ((c
= FETCH_BYTE (i
)) >= 0x80)
250 c
= FETCH_MULTIBYTE_CHAR (i
);
252 if (inword
&& flag
!= CASE_CAPITALIZE_UP
)
254 else if (!UPPERCASEP (c
)
255 && (!inword
|| flag
!= CASE_CAPITALIZE_UP
))
259 int fromlen
, tolen
, j
;
260 unsigned char str
[MAX_MULTIBYTE_LENGTH
];
263 /* Handle the most likely case */
264 if (c
< 0400 && c2
< 0400)
266 else if (fromlen
= CHAR_STRING (c
, str
),
267 tolen
= CHAR_STRING (c2
, str
),
270 for (j
= 0; j
< tolen
; ++j
)
271 FETCH_BYTE (i
+ j
) = str
[j
];
275 error ("Can't casify letters that change length");
276 #if 0 /* This is approximately what we'd like to be able to do here */
278 del_range_1 (i
+ tolen
, i
+ fromlen
, 0, 0);
279 else if (tolen
> fromlen
)
281 TEMP_SET_PT (i
+ fromlen
);
282 insert_1 (str
+ fromlen
, tolen
- fromlen
, 1, 0, 0);
287 if ((int) flag
>= (int) CASE_CAPITALIZE
)
288 inword
= SYNTAX (c2
) == Sword
;
291 TEMP_SET_PT_BOTH (opoint
, opoint_byte
);
294 start
= XFASTINT (b
);
297 signal_after_change (start
, end
- start
, end
- start
);
298 update_compositions (start
, end
, CHECK_ALL
);
302 DEFUN ("upcase-region", Fupcase_region
, Supcase_region
, 2, 2, "r",
303 doc
: /* Convert the region to upper case. In programs, wants two arguments.
304 These arguments specify the starting and ending character numbers of
305 the region to operate on. When used as a command, the text between
306 point and the mark is operated on.
307 See also `capitalize-region'. */)
309 Lisp_Object beg
, end
;
311 casify_region (CASE_UP
, beg
, end
);
315 DEFUN ("downcase-region", Fdowncase_region
, Sdowncase_region
, 2, 2, "r",
316 doc
: /* Convert the region to lower case. In programs, wants two arguments.
317 These arguments specify the starting and ending character numbers of
318 the region to operate on. When used as a command, the text between
319 point and the mark is operated on. */)
321 Lisp_Object beg
, end
;
323 casify_region (CASE_DOWN
, beg
, end
);
327 DEFUN ("capitalize-region", Fcapitalize_region
, Scapitalize_region
, 2, 2, "r",
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. */)
334 Lisp_Object beg
, end
;
336 casify_region (CASE_CAPITALIZE
, beg
, end
);
340 /* Like Fcapitalize_region but change only the initials. */
342 DEFUN ("upcase-initials-region", Fupcase_initials_region
,
343 Supcase_initials_region
, 2, 2, "r",
344 doc
: /* Upcase the initial of each word in the region.
345 Subsequent letters of each word are not changed.
346 In programs, give two arguments, the starting and ending
347 character positions to operate on. */)
349 Lisp_Object beg
, end
;
351 casify_region (CASE_CAPITALIZE_UP
, beg
, end
);
356 operate_on_word (arg
, newpoint
)
366 farend
= scan_words (PT
, iarg
);
368 farend
= iarg
> 0 ? ZV
: BEGV
;
370 *newpoint
= PT
> farend
? PT
: farend
;
371 XSETFASTINT (val
, farend
);
376 DEFUN ("upcase-word", Fupcase_word
, Supcase_word
, 1, 1, "p",
377 doc
: /* Convert following word (or ARG words) to upper case, moving over.
378 With negative argument, convert previous words but do not move.
379 See also `capitalize-word'. */)
383 Lisp_Object beg
, end
;
385 XSETFASTINT (beg
, PT
);
386 end
= operate_on_word (arg
, &newpoint
);
387 casify_region (CASE_UP
, beg
, end
);
392 DEFUN ("downcase-word", Fdowncase_word
, Sdowncase_word
, 1, 1, "p",
393 doc
: /* Convert following word (or ARG words) to lower case, moving over.
394 With negative argument, convert previous words but do not move. */)
398 Lisp_Object beg
, end
;
400 XSETFASTINT (beg
, PT
);
401 end
= operate_on_word (arg
, &newpoint
);
402 casify_region (CASE_DOWN
, beg
, end
);
407 DEFUN ("capitalize-word", Fcapitalize_word
, Scapitalize_word
, 1, 1, "p",
408 doc
: /* Capitalize the following word (or ARG words), moving over.
409 This gives the word(s) a first character in upper case
410 and the rest lower case.
411 With negative argument, capitalize previous words but do not move. */)
415 Lisp_Object beg
, end
;
417 XSETFASTINT (beg
, PT
);
418 end
= operate_on_word (arg
, &newpoint
);
419 casify_region (CASE_CAPITALIZE
, beg
, end
);
425 syms_of_casefiddle ()
427 Qidentity
= intern ("identity");
428 staticpro (&Qidentity
);
430 defsubr (&Sdowncase
);
431 defsubr (&Scapitalize
);
432 defsubr (&Supcase_initials
);
433 defsubr (&Supcase_region
);
434 defsubr (&Sdowncase_region
);
435 defsubr (&Scapitalize_region
);
436 defsubr (&Supcase_initials_region
);
437 defsubr (&Supcase_word
);
438 defsubr (&Sdowncase_word
);
439 defsubr (&Scapitalize_word
);
443 keys_of_casefiddle ()
445 initial_define_key (control_x_map
, Ctl('U'), "upcase-region");
446 Fput (intern ("upcase-region"), Qdisabled
, Qt
);
447 initial_define_key (control_x_map
, Ctl('L'), "downcase-region");
448 Fput (intern ("downcase-region"), Qdisabled
, Qt
);
450 initial_define_key (meta_map
, 'u', "upcase-word");
451 initial_define_key (meta_map
, 'l', "downcase-word");
452 initial_define_key (meta_map
, 'c', "capitalize-word");
455 /* arch-tag: 60a73c66-5489-47e7-a81f-cead4057c526
456 (do not change this comment) */