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[emacs.git] / src / casefiddle.c
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1 /* GNU Emacs case conversion functions.
2 Copyright (C) 1985 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
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
8 the Free Software Foundation; either version 1, or (at your option)
9 any later version.
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.
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
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
21 #include "config.h"
22 #include "lisp.h"
23 #include "buffer.h"
24 #include "commands.h"
25 #include "syntax.h"
27 enum case_action {CASE_UP, CASE_DOWN, CASE_CAPITALIZE, CASE_CAPITALIZE_UP};
29 Lisp_Object
30 casify_object (flag, obj)
31 enum case_action flag;
32 Lisp_Object obj;
34 register int i, c, len;
35 register int inword = flag == CASE_DOWN;
37 while (1)
39 if (XTYPE (obj) == Lisp_Int)
41 c = XINT (obj);
42 if (c >= 0 && c <= 0400)
44 if (inword)
45 XFASTINT (obj) = DOWNCASE (c);
46 else if (!UPPERCASEP (c))
47 XFASTINT (obj) = UPCASE1 (c);
49 return obj;
51 if (XTYPE (obj) == Lisp_String)
53 obj = Fcopy_sequence (obj);
54 len = XSTRING (obj)->size;
55 for (i = 0; i < len; i++)
57 c = XSTRING (obj)->data[i];
58 if (inword)
59 c = DOWNCASE (c);
60 else if (!UPPERCASEP (c))
61 c = UPCASE1 (c);
62 XSTRING (obj)->data[i] = c;
63 if (flag == CASE_CAPITALIZE)
64 inword = SYNTAX (c) == Sword;
66 return obj;
68 obj = wrong_type_argument (Qchar_or_string_p, obj, 0);
72 DEFUN ("upcase", Fupcase, Supcase, 1, 1, 0,
73 "Convert argument to upper case and return that.\n\
74 The argument may be a character or string. The result has the same type.\n\
75 The argument object is not altered. See also `capitalize'.")
76 (obj)
77 Lisp_Object obj;
79 return casify_object (CASE_UP, obj);
82 DEFUN ("downcase", Fdowncase, Sdowncase, 1, 1, 0,
83 "Convert argument to lower case and return that.\n\
84 The argument may be a character or string. The result has the same type.\n\
85 The argument object is not altered.")
86 (obj)
87 Lisp_Object obj;
89 return casify_object (CASE_DOWN, obj);
92 DEFUN ("capitalize", Fcapitalize, Scapitalize, 1, 1, 0,
93 "Convert argument to capitalized form and return that.\n\
94 This means that each word's first character is upper case\n\
95 and the rest is lower case.\n\
96 The argument may be a character or string. The result has the same type.\n\
97 The argument object is not altered.")
98 (obj)
99 Lisp_Object obj;
101 return casify_object (CASE_CAPITALIZE, obj);
104 /* flag is CASE_UP, CASE_DOWN or CASE_CAPITALIZE or CASE_CAPITALIZE_UP.
105 b and e specify range of buffer to operate on. */
107 casify_region (flag, b, e)
108 enum case_action flag;
109 Lisp_Object b, e;
111 register int i;
112 register int c;
113 register int inword = flag == CASE_DOWN;
115 if (EQ (b, e))
116 /* Not modifying because nothing marked */
117 return;
119 validate_region (&b, &e);
120 modify_region (XFASTINT (b), XFASTINT (e));
121 record_change (XFASTINT (b), XFASTINT (e) - XFASTINT (b));
123 for (i = XFASTINT (b); i < XFASTINT (e); i++)
125 c = FETCH_CHAR (i);
126 if (inword && flag != CASE_CAPITALIZE_UP)
127 c = DOWNCASE (c);
128 else if (!UPPERCASEP (c)
129 && (!inword || flag != CASE_CAPITALIZE_UP))
130 c = UPCASE1 (c);
131 FETCH_CHAR (i) = c;
132 if ((int) flag >= (int) CASE_CAPITALIZE)
133 inword = SYNTAX (c) == Sword;
136 signal_after_change (XFASTINT (b),
137 XFASTINT (e) - XFASTINT (b),
138 XFASTINT (e) - XFASTINT (b));
141 DEFUN ("upcase-region", Fupcase_region, Supcase_region, 2, 2, "r",
142 "Convert the region to upper case. In programs, wants two arguments.\n\
143 These arguments specify the starting and ending character numbers of\n\
144 the region to operate on. When used as a command, the text between\n\
145 point and the mark is operated on.\n\
146 See also `capitalize-region'.")
147 (b, e)
148 Lisp_Object b, e;
150 casify_region (CASE_UP, b, e);
151 return Qnil;
154 DEFUN ("downcase-region", Fdowncase_region, Sdowncase_region, 2, 2, "r",
155 "Convert the region to lower case. In programs, wants two arguments.\n\
156 These arguments specify the starting and ending character numbers of\n\
157 the region to operate on. When used as a command, the text between\n\
158 point and the mark is operated on.")
159 (b, e)
160 Lisp_Object b, e;
162 casify_region (CASE_DOWN, b, e);
163 return Qnil;
166 DEFUN ("capitalize-region", Fcapitalize_region, Scapitalize_region, 2, 2, "r",
167 "Convert the region to capitalized form.\n\
168 Capitalized form means each word's first character is upper case\n\
169 and the rest of it is lower case.\n\
170 In programs, give two arguments, the starting and ending\n\
171 character positions to operate on.")
172 (b, e)
173 Lisp_Object b, e;
175 casify_region (CASE_CAPITALIZE, b, e);
176 return Qnil;
179 /* Like Fcapitalize but change only the initials. */
181 Lisp_Object
182 upcase_initials_region (b, e)
183 Lisp_Object b, e;
185 casify_region (CASE_CAPITALIZE_UP, b, e);
186 return Qnil;
189 Lisp_Object
190 operate_on_word (arg)
191 Lisp_Object arg;
193 Lisp_Object val, end;
194 int farend;
196 CHECK_NUMBER (arg, 0);
197 farend = scan_words (point, XINT (arg));
198 if (!farend)
199 farend = XINT (arg) > 0 ? ZV : BEGV;
201 end = point > farend ? point : farend;
202 SET_PT (end);
203 XFASTINT (val) = farend;
205 return val;
208 DEFUN ("upcase-word", Fupcase_word, Supcase_word, 1, 1, "p",
209 "Convert following word (or ARG words) to upper case, moving over.\n\
210 With negative argument, convert previous words but do not move.\n\
211 See also `capitalize-word'.")
212 (arg)
213 Lisp_Object arg;
215 Lisp_Object opoint;
217 XFASTINT (opoint) = point;
218 casify_region (CASE_UP, opoint, operate_on_word (arg));
219 return Qnil;
222 DEFUN ("downcase-word", Fdowncase_word, Sdowncase_word, 1, 1, "p",
223 "Convert following word (or ARG words) to lower case, moving over.\n\
224 With negative argument, convert previous words but do not move.")
225 (arg)
226 Lisp_Object arg;
228 Lisp_Object opoint;
229 XFASTINT (opoint) = point;
230 casify_region (CASE_DOWN, opoint, operate_on_word (arg));
231 return Qnil;
234 DEFUN ("capitalize-word", Fcapitalize_word, Scapitalize_word, 1, 1, "p",
235 "Capitalize the following word (or ARG words), moving over.\n\
236 This gives the word(s) a first character in upper case\n\
237 and the rest lower case.\n\
238 With negative argument, capitalize previous words but do not move.")
239 (arg)
240 Lisp_Object arg;
242 Lisp_Object opoint;
243 XFASTINT (opoint) = point;
244 casify_region (CASE_CAPITALIZE, opoint, operate_on_word (arg));
245 return Qnil;
248 syms_of_casefiddle ()
250 defsubr (&Supcase);
251 defsubr (&Sdowncase);
252 defsubr (&Scapitalize);
253 defsubr (&Supcase_region);
254 defsubr (&Sdowncase_region);
255 defsubr (&Scapitalize_region);
256 defsubr (&Supcase_word);
257 defsubr (&Sdowncase_word);
258 defsubr (&Scapitalize_word);
261 keys_of_casefiddle ()
263 initial_define_key (control_x_map, Ctl('U'), "upcase-region");
264 Fput (intern ("upcase-region"), Qdisabled, Qt);
265 initial_define_key (control_x_map, Ctl('L'), "downcase-region");
266 Fput (intern ("downcase-region"), Qdisabled, Qt);
268 initial_define_key (meta_map, 'u', "upcase-word");
269 initial_define_key (meta_map, 'l', "downcase-word");
270 initial_define_key (meta_map, 'c', "capitalize-word");