lib/c-ctype.c

   1 /* Character handling in C locale.
   2
   3    Copyright 2000-2003, 2006, 2009-2012 Free Software Foundation, Inc.
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 3 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #include <config.h>
  19
  20 /* Specification.  */
  21 #define NO_C_CTYPE_MACROS
  22 #include "c-ctype.h"
  23
  24 /* The function isascii is not locale dependent. Its use in EBCDIC is
  25    questionable. */
  26 bool
  27 c_isascii (int c)
  28 {
  29   return (c >= 0x00 && c <= 0x7f);
  30 }
  31
  32 bool
  33 c_isalnum (int c)
  34 {
  35 #if C_CTYPE_CONSECUTIVE_DIGITS \
  36     && C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
  37 #if C_CTYPE_ASCII
  38   return ((c >= '0' && c <= '9')
  39           || ((c & ~0x20) >= 'A' && (c & ~0x20) <= 'Z'));
  40 #else
  41   return ((c >= '0' && c <= '9')
  42           || (c >= 'A' && c <= 'Z')
  43           || (c >= 'a' && c <= 'z'));
  44 #endif
  45 #else
  46   switch (c)
  47     {
  48     case '0': case '1': case '2': case '3': case '4': case '5':
  49     case '6': case '7': case '8': case '9':
  50     case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
  51     case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
  52     case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
  53     case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
  54     case 'Y': case 'Z':
  55     case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
  56     case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
  57     case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
  58     case 's': case 't': case 'u': case 'v': case 'w': case 'x':
  59     case 'y': case 'z':
  60       return 1;
  61     default:
  62       return 0;
  63     }
  64 #endif
  65 }
  66
  67 bool
  68 c_isalpha (int c)
  69 {
  70 #if C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
  71 #if C_CTYPE_ASCII
  72   return ((c & ~0x20) >= 'A' && (c & ~0x20) <= 'Z');
  73 #else
  74   return ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z'));
  75 #endif
  76 #else
  77   switch (c)
  78     {
  79     case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
  80     case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
  81     case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
  82     case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
  83     case 'Y': case 'Z':
  84     case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
  85     case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
  86     case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
  87     case 's': case 't': case 'u': case 'v': case 'w': case 'x':
  88     case 'y': case 'z':
  89       return 1;
  90     default:
  91       return 0;
  92     }
  93 #endif
  94 }
  95
  96 bool
  97 c_isblank (int c)
  98 {
  99   return (c == ' ' || c == '\t');
 100 }
 101
 102 bool
 103 c_iscntrl (int c)
 104 {
 105 #if C_CTYPE_ASCII
 106   return ((c & ~0x1f) == 0 || c == 0x7f);
 107 #else
 108   switch (c)
 109     {
 110     case ' ': case '!': case '"': case '#': case '$': case '%':
 111     case '&': case '\'': case '(': case ')': case '*': case '+':
 112     case ',': case '-': case '.': case '/':
 113     case '0': case '1': case '2': case '3': case '4': case '5':
 114     case '6': case '7': case '8': case '9':
 115     case ':': case ';': case '<': case '=': case '>': case '?':
 116     case '@':
 117     case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
 118     case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
 119     case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
 120     case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
 121     case 'Y': case 'Z':
 122     case '[': case '\\': case ']': case '^': case '_': case '`':
 123     case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
 124     case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
 125     case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
 126     case 's': case 't': case 'u': case 'v': case 'w': case 'x':
 127     case 'y': case 'z':
 128     case '{': case '|': case '}': case '~':
 129       return 0;
 130     default:
 131       return 1;
 132     }
 133 #endif
 134 }
 135
 136 bool
 137 c_isdigit (int c)
 138 {
 139 #if C_CTYPE_CONSECUTIVE_DIGITS
 140   return (c >= '0' && c <= '9');
 141 #else
 142   switch (c)
 143     {
 144     case '0': case '1': case '2': case '3': case '4': case '5':
 145     case '6': case '7': case '8': case '9':
 146       return 1;
 147     default:
 148       return 0;
 149     }
 150 #endif
 151 }
 152
 153 bool
 154 c_islower (int c)
 155 {
 156 #if C_CTYPE_CONSECUTIVE_LOWERCASE
 157   return (c >= 'a' && c <= 'z');
 158 #else
 159   switch (c)
 160     {
 161     case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
 162     case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
 163     case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
 164     case 's': case 't': case 'u': case 'v': case 'w': case 'x':
 165     case 'y': case 'z':
 166       return 1;
 167     default:
 168       return 0;
 169     }
 170 #endif
 171 }
 172
 173 bool
 174 c_isgraph (int c)
 175 {
 176 #if C_CTYPE_ASCII
 177   return (c >= '!' && c <= '~');
 178 #else
 179   switch (c)
 180     {
 181     case '!': case '"': case '#': case '$': case '%': case '&':
 182     case '\'': case '(': case ')': case '*': case '+': case ',':
 183     case '-': case '.': case '/':
 184     case '0': case '1': case '2': case '3': case '4': case '5':
 185     case '6': case '7': case '8': case '9':
 186     case ':': case ';': case '<': case '=': case '>': case '?':
 187     case '@':
 188     case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
 189     case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
 190     case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
 191     case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
 192     case 'Y': case 'Z':
 193     case '[': case '\\': case ']': case '^': case '_': case '`':
 194     case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
 195     case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
 196     case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
 197     case 's': case 't': case 'u': case 'v': case 'w': case 'x':
 198     case 'y': case 'z':
 199     case '{': case '|': case '}': case '~':
 200       return 1;
 201     default:
 202       return 0;
 203     }
 204 #endif
 205 }
 206
 207 bool
 208 c_isprint (int c)
 209 {
 210 #if C_CTYPE_ASCII
 211   return (c >= ' ' && c <= '~');
 212 #else
 213   switch (c)
 214     {
 215     case ' ': case '!': case '"': case '#': case '$': case '%':
 216     case '&': case '\'': case '(': case ')': case '*': case '+':
 217     case ',': case '-': case '.': case '/':
 218     case '0': case '1': case '2': case '3': case '4': case '5':
 219     case '6': case '7': case '8': case '9':
 220     case ':': case ';': case '<': case '=': case '>': case '?':
 221     case '@':
 222     case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
 223     case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
 224     case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
 225     case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
 226     case 'Y': case 'Z':
 227     case '[': case '\\': case ']': case '^': case '_': case '`':
 228     case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
 229     case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
 230     case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
 231     case 's': case 't': case 'u': case 'v': case 'w': case 'x':
 232     case 'y': case 'z':
 233     case '{': case '|': case '}': case '~':
 234       return 1;
 235     default:
 236       return 0;
 237     }
 238 #endif
 239 }
 240
 241 bool
 242 c_ispunct (int c)
 243 {
 244 #if C_CTYPE_ASCII
 245   return ((c >= '!' && c <= '~')
 246           && !((c >= '0' && c <= '9')
 247                || ((c & ~0x20) >= 'A' && (c & ~0x20) <= 'Z')));
 248 #else
 249   switch (c)
 250     {
 251     case '!': case '"': case '#': case '$': case '%': case '&':
 252     case '\'': case '(': case ')': case '*': case '+': case ',':
 253     case '-': case '.': case '/':
 254     case ':': case ';': case '<': case '=': case '>': case '?':
 255     case '@':
 256     case '[': case '\\': case ']': case '^': case '_': case '`':
 257     case '{': case '|': case '}': case '~':
 258       return 1;
 259     default:
 260       return 0;
 261     }
 262 #endif
 263 }
 264
 265 bool
 266 c_isspace (int c)
 267 {
 268   return (c == ' ' || c == '\t'
 269           || c == '\n' || c == '\v' || c == '\f' || c == '\r');
 270 }
 271
 272 bool
 273 c_isupper (int c)
 274 {
 275 #if C_CTYPE_CONSECUTIVE_UPPERCASE
 276   return (c >= 'A' && c <= 'Z');
 277 #else
 278   switch (c)
 279     {
 280     case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
 281     case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
 282     case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
 283     case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
 284     case 'Y': case 'Z':
 285       return 1;
 286     default:
 287       return 0;
 288     }
 289 #endif
 290 }
 291
 292 bool
 293 c_isxdigit (int c)
 294 {
 295 #if C_CTYPE_CONSECUTIVE_DIGITS \
 296     && C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
 297 #if C_CTYPE_ASCII
 298   return ((c >= '0' && c <= '9')
 299           || ((c & ~0x20) >= 'A' && (c & ~0x20) <= 'F'));
 300 #else
 301   return ((c >= '0' && c <= '9')
 302           || (c >= 'A' && c <= 'F')
 303           || (c >= 'a' && c <= 'f'));
 304 #endif
 305 #else
 306   switch (c)
 307     {
 308     case '0': case '1': case '2': case '3': case '4': case '5':
 309     case '6': case '7': case '8': case '9':
 310     case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
 311     case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
 312       return 1;
 313     default:
 314       return 0;
 315     }
 316 #endif
 317 }
 318
 319 int
 320 c_tolower (int c)
 321 {
 322 #if C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
 323   return (c >= 'A' && c <= 'Z' ? c - 'A' + 'a' : c);
 324 #else
 325   switch (c)
 326     {
 327     case 'A': return 'a';
 328     case 'B': return 'b';
 329     case 'C': return 'c';
 330     case 'D': return 'd';
 331     case 'E': return 'e';
 332     case 'F': return 'f';
 333     case 'G': return 'g';
 334     case 'H': return 'h';
 335     case 'I': return 'i';
 336     case 'J': return 'j';
 337     case 'K': return 'k';
 338     case 'L': return 'l';
 339     case 'M': return 'm';
 340     case 'N': return 'n';
 341     case 'O': return 'o';
 342     case 'P': return 'p';
 343     case 'Q': return 'q';
 344     case 'R': return 'r';
 345     case 'S': return 's';
 346     case 'T': return 't';
 347     case 'U': return 'u';
 348     case 'V': return 'v';
 349     case 'W': return 'w';
 350     case 'X': return 'x';
 351     case 'Y': return 'y';
 352     case 'Z': return 'z';
 353     default: return c;
 354     }
 355 #endif
 356 }
 357
 358 int
 359 c_toupper (int c)
 360 {
 361 #if C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
 362   return (c >= 'a' && c <= 'z' ? c - 'a' + 'A' : c);
 363 #else
 364   switch (c)
 365     {
 366     case 'a': return 'A';
 367     case 'b': return 'B';
 368     case 'c': return 'C';
 369     case 'd': return 'D';
 370     case 'e': return 'E';
 371     case 'f': return 'F';
 372     case 'g': return 'G';
 373     case 'h': return 'H';
 374     case 'i': return 'I';
 375     case 'j': return 'J';
 376     case 'k': return 'K';
 377     case 'l': return 'L';
 378     case 'm': return 'M';
 379     case 'n': return 'N';
 380     case 'o': return 'O';
 381     case 'p': return 'P';
 382     case 'q': return 'Q';
 383     case 'r': return 'R';
 384     case 's': return 'S';
 385     case 't': return 'T';
 386     case 'u': return 'U';
 387     case 'v': return 'V';
 388     case 'w': return 'W';
 389     case 'x': return 'X';
 390     case 'y': return 'Y';
 391     case 'z': return 'Z';
 392     default: return c;
 393     }
 394 #endif
 395 }