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annotate src/casefiddle.c @ 5001:714d854d00e9
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| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Sun, 07 Feb 2010 05:23:07 -0600 |
| parents | 6bc1f3f6cf0d |
| children | 308d34e9f07d |
| rev | line source |
|---|---|
| 428 | 1 /* XEmacs case conversion functions. |
| 2 Copyright (C) 1985, 1992, 1993, 1994, 1997, 1998 Free Software Foundation, Inc. | |
| 826 | 3 Copyright (C) 2002 Ben Wing. |
| 428 | 4 |
| 5 This file is part of XEmacs. | |
| 6 | |
| 7 XEmacs is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 9 Free Software Foundation; either version 2, or (at your option) any | |
| 10 later version. | |
| 11 | |
| 12 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 18 along with XEmacs; 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. */ | |
| 21 | |
| 22 /* Synched up with: FSF 19.34, but substantially rewritten by Martin. */ | |
| 23 | |
| 24 #include <config.h> | |
| 25 #include "lisp.h" | |
| 26 | |
| 27 #include "buffer.h" | |
| 28 #include "insdel.h" | |
| 29 #include "syntax.h" | |
| 30 | |
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31 enum case_action {CASE_UP, CASE_DOWN, CASE_CAPITALIZE, CASE_CAPITALIZE_UP, |
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32 CASE_CANONICALIZE}; |
| 428 | 33 |
| 34 static Lisp_Object | |
| 444 | 35 casify_object (enum case_action flag, Lisp_Object string_or_char, |
| 36 Lisp_Object buffer) | |
| 428 | 37 { |
| 38 struct buffer *buf = decode_buffer (buffer, 0); | |
| 39 | |
| 40 retry: | |
| 41 | |
| 444 | 42 if (CHAR_OR_CHAR_INTP (string_or_char)) |
| 428 | 43 { |
| 867 | 44 Ichar c; |
| 444 | 45 CHECK_CHAR_COERCE_INT (string_or_char); |
| 46 c = XCHAR (string_or_char); | |
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47 if (flag == CASE_DOWN) |
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48 { |
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49 c = DOWNCASE (buf, c); |
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50 } |
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51 else if (flag == CASE_UP) |
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52 { |
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53 c = UPCASE (buf, c); |
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54 } |
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55 else |
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56 { |
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57 c = CANONCASE (buf, c); |
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58 } |
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59 |
| 428 | 60 return make_char (c); |
| 61 } | |
| 62 | |
| 444 | 63 if (STRINGP (string_or_char)) |
| 428 | 64 { |
| 826 | 65 Lisp_Object syntax_table = buf->mirror_syntax_table; |
| 867 | 66 Ibyte *storage = |
| 2367 | 67 alloca_ibytes (XSTRING_LENGTH (string_or_char) * MAX_ICHAR_LEN); |
| 867 | 68 Ibyte *newp = storage; |
| 69 Ibyte *oldp = XSTRING_DATA (string_or_char); | |
| 70 Ibyte *endp = oldp + XSTRING_LENGTH (string_or_char); | |
| 428 | 71 int wordp = 0, wordp_prev; |
| 72 | |
| 771 | 73 while (oldp < endp) |
| 428 | 74 { |
| 867 | 75 Ichar c = itext_ichar (oldp); |
| 428 | 76 switch (flag) |
| 77 { | |
| 78 case CASE_UP: | |
| 79 c = UPCASE (buf, c); | |
| 80 break; | |
| 81 case CASE_DOWN: | |
| 82 c = DOWNCASE (buf, c); | |
| 83 break; | |
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84 case CASE_CANONICALIZE: |
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85 c = CANONCASE (buf, c); |
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86 break; |
| 428 | 87 case CASE_CAPITALIZE: |
| 88 case CASE_CAPITALIZE_UP: | |
| 89 wordp_prev = wordp; | |
| 90 wordp = WORD_SYNTAX_P (syntax_table, c); | |
| 91 if (!wordp) break; | |
| 92 if (wordp_prev) | |
| 93 { | |
| 94 if (flag == CASE_CAPITALIZE) | |
| 95 c = DOWNCASE (buf, c); | |
| 96 } | |
| 97 else | |
| 98 c = UPCASE (buf, c); | |
| 99 break; | |
| 100 } | |
| 101 | |
| 867 | 102 newp += set_itext_ichar (newp, c); |
| 103 INC_IBYTEPTR (oldp); | |
| 428 | 104 } |
| 105 | |
| 106 return make_string (storage, newp - storage); | |
| 107 } | |
| 108 | |
| 444 | 109 string_or_char = wrong_type_argument (Qchar_or_string_p, string_or_char); |
| 428 | 110 goto retry; |
| 111 } | |
| 112 | |
| 113 DEFUN ("upcase", Fupcase, 1, 2, 0, /* | |
| 444 | 114 Convert STRING-OR-CHAR to upper case and return that. |
| 115 STRING-OR-CHAR may be a character or string. The result has the same type. | |
| 116 STRING-OR-CHAR is not altered--the value is a copy. | |
| 428 | 117 See also `capitalize', `downcase' and `upcase-initials'. |
| 118 Optional second arg BUFFER specifies which buffer's case tables to use, | |
| 119 and defaults to the current buffer. | |
| 120 */ | |
| 444 | 121 (string_or_char, buffer)) |
| 428 | 122 { |
| 444 | 123 return casify_object (CASE_UP, string_or_char, buffer); |
| 428 | 124 } |
| 125 | |
| 126 DEFUN ("downcase", Fdowncase, 1, 2, 0, /* | |
| 444 | 127 Convert STRING-OR-CHAR to lower case and return that. |
| 128 STRING-OR-CHAR may be a character or string. The result has the same type. | |
| 129 STRING-OR-CHAR is not altered--the value is a copy. | |
| 428 | 130 Optional second arg BUFFER specifies which buffer's case tables to use, |
| 131 and defaults to the current buffer. | |
| 132 */ | |
| 444 | 133 (string_or_char, buffer)) |
| 428 | 134 { |
| 444 | 135 return casify_object (CASE_DOWN, string_or_char, buffer); |
| 428 | 136 } |
| 137 | |
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138 DEFUN ("canoncase", Fcanoncase, 1, 2, 0, /* |
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139 Convert STRING-OR-CHAR to its canonical lowercase form and return that. |
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140 |
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141 STRING-OR-CHAR may be a character or string. The result has the same type. |
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142 STRING-OR-CHAR is not altered--the value is a copy. |
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143 |
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144 Optional second arg BUFFER specifies which buffer's case tables to use, |
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145 and defaults to the current buffer. |
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146 |
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147 For any N characters that are equivalent in case-insensitive searching, |
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148 their canonical lowercase character will be the same. |
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149 */ |
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150 (string_or_char, buffer)) |
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151 { |
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152 return casify_object (CASE_CANONICALIZE, string_or_char, buffer); |
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153 } |
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154 |
| 428 | 155 DEFUN ("capitalize", Fcapitalize, 1, 2, 0, /* |
| 444 | 156 Convert STRING-OR-CHAR to capitalized form and return that. |
| 428 | 157 This means that each word's first character is upper case |
| 158 and the rest is lower case. | |
| 444 | 159 STRING-OR-CHAR may be a character or string. The result has the same type. |
| 160 STRING-OR-CHAR is not altered--the value is a copy. | |
| 428 | 161 Optional second arg BUFFER specifies which buffer's case tables to use, |
| 162 and defaults to the current buffer. | |
| 163 */ | |
| 444 | 164 (string_or_char, buffer)) |
| 428 | 165 { |
| 444 | 166 return casify_object (CASE_CAPITALIZE, string_or_char, buffer); |
| 428 | 167 } |
| 168 | |
| 169 /* Like Fcapitalize but change only the initial characters. */ | |
| 170 | |
| 171 DEFUN ("upcase-initials", Fupcase_initials, 1, 2, 0, /* | |
| 444 | 172 Convert the initial of each word in STRING-OR-CHAR to upper case. |
| 428 | 173 Do not change the other letters of each word. |
| 444 | 174 STRING-OR-CHAR may be a character or string. The result has the same type. |
| 175 STRING-OR-CHAR is not altered--the value is a copy. | |
| 428 | 176 Optional second arg BUFFER specifies which buffer's case tables to use, |
| 177 and defaults to the current buffer. | |
| 178 */ | |
| 444 | 179 (string_or_char, buffer)) |
| 428 | 180 { |
| 444 | 181 return casify_object (CASE_CAPITALIZE_UP, string_or_char, buffer); |
| 428 | 182 } |
| 183 | |
| 184 /* flag is CASE_UP, CASE_DOWN or CASE_CAPITALIZE or CASE_CAPITALIZE_UP. | |
| 444 | 185 START and END specify range of buffer to operate on. */ |
| 428 | 186 |
| 187 static void | |
| 444 | 188 casify_region_internal (enum case_action flag, Lisp_Object start, |
| 189 Lisp_Object end, struct buffer *buf) | |
| 428 | 190 { |
| 191 /* This function can GC */ | |
| 665 | 192 Charbpos pos, s, e; |
| 826 | 193 Lisp_Object syntax_table = buf->mirror_syntax_table; |
| 428 | 194 int mccount; |
| 195 int wordp = 0, wordp_prev; | |
| 196 | |
| 444 | 197 if (EQ (start, end)) |
| 428 | 198 /* Not modifying because nothing marked */ |
| 199 return; | |
| 200 | |
| 444 | 201 get_buffer_range_char (buf, start, end, &s, &e, 0); |
| 202 | |
| 203 mccount = begin_multiple_change (buf, s, e); | |
| 204 record_change (buf, s, e - s); | |
| 428 | 205 |
| 444 | 206 for (pos = s; pos < e; pos++) |
| 428 | 207 { |
| 867 | 208 Ichar oldc = BUF_FETCH_CHAR (buf, pos); |
| 209 Ichar c = oldc; | |
| 428 | 210 |
| 211 switch (flag) | |
| 212 { | |
| 213 case CASE_UP: | |
| 214 c = UPCASE (buf, oldc); | |
| 215 break; | |
| 216 case CASE_DOWN: | |
| 217 c = DOWNCASE (buf, oldc); | |
| 218 break; | |
| 219 case CASE_CAPITALIZE: | |
| 220 case CASE_CAPITALIZE_UP: | |
| 221 /* !!#### need to revalidate the start and end pointers in case | |
| 222 the buffer was changed */ | |
| 223 wordp_prev = wordp; | |
| 224 wordp = WORD_SYNTAX_P (syntax_table, c); | |
| 225 if (!wordp) continue; | |
| 226 if (wordp_prev) | |
| 227 { | |
| 228 if (flag == CASE_CAPITALIZE) | |
| 229 c = DOWNCASE (buf, c); | |
| 230 } | |
| 231 else | |
| 232 c = UPCASE (buf, c); | |
| 233 break; | |
| 234 } | |
| 235 | |
| 236 if (oldc == c) continue; | |
| 444 | 237 buffer_replace_char (buf, pos, c, 1, (pos == s)); |
| 428 | 238 BUF_MODIFF (buf)++; |
| 239 } | |
| 240 | |
| 241 end_multiple_change (buf, mccount); | |
| 242 } | |
| 243 | |
| 244 static Lisp_Object | |
| 444 | 245 casify_region (enum case_action flag, Lisp_Object start, Lisp_Object end, |
| 428 | 246 Lisp_Object buffer) |
| 247 { | |
| 444 | 248 casify_region_internal (flag, start, end, decode_buffer (buffer, 1)); |
| 428 | 249 return Qnil; |
| 250 } | |
| 251 | |
| 252 DEFUN ("upcase-region", Fupcase_region, 2, 3, "r", /* | |
| 253 Convert the region to upper case. In programs, wants two arguments. | |
| 254 These arguments specify the starting and ending character numbers of | |
| 255 the region to operate on. When used as a command, the text between | |
| 256 point and the mark is operated on. | |
| 257 See also `capitalize-region'. | |
| 258 Optional third arg BUFFER defaults to the current buffer. | |
| 259 */ | |
| 444 | 260 (start, end, buffer)) |
| 428 | 261 { |
| 262 /* This function can GC */ | |
| 444 | 263 return casify_region (CASE_UP, start, end, buffer); |
| 428 | 264 } |
| 265 | |
| 266 DEFUN ("downcase-region", Fdowncase_region, 2, 3, "r", /* | |
| 267 Convert the region to lower case. In programs, wants two arguments. | |
| 268 These arguments specify the starting and ending character numbers of | |
| 269 the region to operate on. When used as a command, the text between | |
| 270 point and the mark is operated on. | |
| 271 Optional third arg BUFFER defaults to the current buffer. | |
| 272 */ | |
| 444 | 273 (start, end, buffer)) |
| 428 | 274 { |
| 275 /* This function can GC */ | |
| 444 | 276 return casify_region (CASE_DOWN, start, end, buffer); |
| 428 | 277 } |
| 278 | |
| 279 DEFUN ("capitalize-region", Fcapitalize_region, 2, 3, "r", /* | |
| 280 Convert the region to capitalized form. | |
| 281 Capitalized form means each word's first character is upper case | |
| 282 and the rest of it is lower case. | |
| 283 In programs, give two arguments, the starting and ending | |
| 284 character positions to operate on. | |
| 285 Optional third arg BUFFER defaults to the current buffer. | |
| 286 */ | |
| 444 | 287 (start, end, buffer)) |
| 428 | 288 { |
| 289 /* This function can GC */ | |
| 444 | 290 return casify_region (CASE_CAPITALIZE, start, end, buffer); |
| 428 | 291 } |
| 292 | |
| 293 /* Like Fcapitalize_region but change only the initials. */ | |
| 294 | |
| 295 DEFUN ("upcase-initials-region", Fupcase_initials_region, 2, 3, "r", /* | |
| 296 Upcase the initial of each word in the region. | |
| 297 Subsequent letters of each word are not changed. | |
| 298 In programs, give two arguments, the starting and ending | |
| 299 character positions to operate on. | |
| 300 Optional third arg BUFFER defaults to the current buffer. | |
| 301 */ | |
| 444 | 302 (start, end, buffer)) |
| 428 | 303 { |
| 444 | 304 return casify_region (CASE_CAPITALIZE_UP, start, end, buffer); |
| 428 | 305 } |
| 306 | |
| 307 | |
| 308 static Lisp_Object | |
| 309 casify_word (enum case_action flag, Lisp_Object arg, Lisp_Object buffer) | |
| 310 { | |
| 665 | 311 Charbpos farend; |
| 428 | 312 struct buffer *buf = decode_buffer (buffer, 1); |
| 313 | |
| 314 CHECK_INT (arg); | |
| 315 | |
| 316 farend = scan_words (buf, BUF_PT (buf), XINT (arg)); | |
| 317 if (!farend) | |
| 318 farend = XINT (arg) > 0 ? BUF_ZV (buf) : BUF_BEGV (buf); | |
| 319 | |
| 320 casify_region_internal (flag, make_int (BUF_PT (buf)), make_int (farend), buf); | |
| 321 BUF_SET_PT (buf, max (BUF_PT (buf), farend)); | |
| 322 return Qnil; | |
| 323 } | |
| 324 | |
| 325 DEFUN ("upcase-word", Fupcase_word, 1, 2, "p", /* | |
| 444 | 326 Convert following word (or COUNT words) to upper case, moving over. |
| 428 | 327 With negative argument, convert previous words but do not move. |
| 328 See also `capitalize-word'. | |
| 329 Optional second arg BUFFER defaults to the current buffer. | |
| 330 */ | |
| 444 | 331 (count, buffer)) |
| 428 | 332 { |
| 333 /* This function can GC */ | |
| 444 | 334 return casify_word (CASE_UP, count, buffer); |
| 428 | 335 } |
| 336 | |
| 337 DEFUN ("downcase-word", Fdowncase_word, 1, 2, "p", /* | |
| 444 | 338 Convert following word (or COUNT words) to lower case, moving over. |
| 428 | 339 With negative argument, convert previous words but do not move. |
| 340 Optional second arg BUFFER defaults to the current buffer. | |
| 341 */ | |
| 444 | 342 (count, buffer)) |
| 428 | 343 { |
| 344 /* This function can GC */ | |
| 444 | 345 return casify_word (CASE_DOWN, count, buffer); |
| 428 | 346 } |
| 347 | |
| 348 DEFUN ("capitalize-word", Fcapitalize_word, 1, 2, "p", /* | |
| 444 | 349 Capitalize the following word (or COUNT words), moving over. |
| 428 | 350 This gives the word(s) a first character in upper case |
| 351 and the rest lower case. | |
| 352 With negative argument, capitalize previous words but do not move. | |
| 353 Optional second arg BUFFER defaults to the current buffer. | |
| 354 */ | |
| 444 | 355 (count, buffer)) |
| 428 | 356 { |
| 357 /* This function can GC */ | |
| 444 | 358 return casify_word (CASE_CAPITALIZE, count, buffer); |
| 428 | 359 } |
| 360 | |
| 361 | |
| 362 void | |
| 363 syms_of_casefiddle (void) | |
| 364 { | |
| 365 DEFSUBR (Fupcase); | |
| 366 DEFSUBR (Fdowncase); | |
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367 DEFSUBR (Fcanoncase); |
| 428 | 368 DEFSUBR (Fcapitalize); |
| 369 DEFSUBR (Fupcase_initials); | |
| 370 DEFSUBR (Fupcase_region); | |
| 371 DEFSUBR (Fdowncase_region); | |
| 372 DEFSUBR (Fcapitalize_region); | |
| 373 DEFSUBR (Fupcase_initials_region); | |
| 374 DEFSUBR (Fupcase_word); | |
| 375 DEFSUBR (Fdowncase_word); | |
| 376 DEFSUBR (Fcapitalize_word); | |
| 377 } |