gl/c-ctype.c

   1 /* Character handling in C locale.
   2
   3    Copyright 2000-2003, 2006 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, write to the Free Software Foundation,
  17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  18
  19 #include <config.h>
  20
  21 /* Specification.  */
  22 #define NO_C_CTYPE_MACROS
  23 #include "c-ctype.h"
  24
  25 /* The function isascii is not locale dependent. Its use in EBCDIC is
  26    questionable. */
  27 bool
  28 c_isascii (int c)
  29 {
  30   return (c >= 0x00 && c <= 0x7f);
  31 }
  32
  33 bool
  34 c_isalnum (int c)
  35 {
  36 #if C_CTYPE_CONSECUTIVE_DIGITS \
  37     && C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
  38 #if C_CTYPE_ASCII
  39   return ((c >= '0' && c <= '9')
  40           || ((c & ~0x20) >= 'A' && (c & ~0x20) <= 'Z'));
  41 #else
  42   return ((c >= '0' && c <= '9')
  43           || (c >= 'A' && c <= 'Z')
  44           || (c >= 'a' && c <= 'z'));
  45 #endif
  46 #else
  47   switch (c)
  48     {
  49     case '0': case '1': case '2': case '3': case '4': case '5':
  50     case '6': case '7': case '8': case '9':
  51     case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
  52     case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
  53     case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
  54     case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
  55     case 'Y': case 'Z':
  56     case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
  57     case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
  58     case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
  59     case 's': case 't': case 'u': case 'v': case 'w': case 'x':
  60     case 'y': case 'z':
  61       return 1;
  62     default:
  63       return 0;
  64     }
  65 #endif
  66 }
  67
  68 bool
  69 c_isalpha (int c)
  70 {
  71 #if C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
  72 #if C_CTYPE_ASCII
  73   return ((c & ~0x20) >= 'A' && (c & ~0x20) <= 'Z');
  74 #else
  75   return ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z'));
  76 #endif
  77 #else
  78   switch (c)
  79     {
  80     case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
  81     case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
  82     case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
  83     case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
  84     case 'Y': case 'Z':
  85     case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
  86     case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
  87     case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
  88     case 's': case 't': case 'u': case 'v': case 'w': case 'x':
  89     case 'y': case 'z':
  90       return 1;
  91     default:
  92       return 0;
  93     }
  94 #endif
  95 }
  96
  97 bool
  98 c_isblank (int c)
  99 {
 100   return (c == ' ' || c == '\t');
 101 }
 102
 103 bool
 104 c_iscntrl (int c)
 105 {
 106 #if C_CTYPE_ASCII
 107   return ((c & ~0x1f) == 0 || c == 0x7f);
 108 #else
 109   switch (c)
 110     {
 111     case ' ': case '!': case '"': case '#': case '$': case '%':
 112     case '&': case '\'': case '(': case ')': case '*': case '+':
 113     case ',': case '-': case '.': case '/':
 114     case '0': case '1': case '2': case '3': case '4': case '5':
 115     case '6': case '7': case '8': case '9':
 116     case ':': case ';': case '<': case '=': case '>': case '?':
 117     case '@':
 118     case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
 119     case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
 120     case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
 121     case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
 122     case 'Y': case 'Z':
 123     case '[': case '\\': case ']': case '^': case '_': case '`':
 124     case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
 125     case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
 126     case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
 127     case 's': case 't': case 'u': case 'v': case 'w': case 'x':
 128     case 'y': case 'z':
 129     case '{': case '|': case '}': case '~':
 130       return 0;
 131     default:
 132       return 1;
 133     }
 134 #endif
 135 }
 136
 137 bool
 138 c_isdigit (int c)
 139 {
 140 #if C_CTYPE_CONSECUTIVE_DIGITS
 141   return (c >= '0' && c <= '9');
 142 #else
 143   switch (c)
 144     {
 145     case '0': case '1': case '2': case '3': case '4': case '5':
 146     case '6': case '7': case '8': case '9':
 147       return 1;
 148     default:
 149       return 0;
 150     }
 151 #endif
 152 }
 153
 154 bool
 155 c_islower (int c)
 156 {
 157 #if C_CTYPE_CONSECUTIVE_LOWERCASE
 158   return (c >= 'a' && c <= 'z');
 159 #else
 160   switch (c)
 161     {
 162     case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
 163     case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
 164     case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
 165     case 's': case 't': case 'u': case 'v': case 'w': case 'x':
 166     case 'y': case 'z':
 167       return 1;
 168     default:
 169       return 0;
 170     }
 171 #endif
 172 }
 173
 174 bool
 175 c_isgraph (int c)
 176 {
 177 #if C_CTYPE_ASCII
 178   return (c >= '!' && c <= '~');
 179 #else
 180   switch (c)
 181     {
 182     case '!': case '"': case '#': case '$': case '%': case '&':
 183     case '\'': case '(': case ')': case '*': case '+': case ',':
 184     case '-': case '.': case '/':
 185     case '0': case '1': case '2': case '3': case '4': case '5':
 186     case '6': case '7': case '8': case '9':
 187     case ':': case ';': case '<': case '=': case '>': case '?':
 188     case '@':
 189     case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
 190     case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
 191     case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
 192     case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
 193     case 'Y': case 'Z':
 194     case '[': case '\\': case ']': case '^': case '_': case '`':
 195     case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
 196     case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
 197     case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
 198     case 's': case 't': case 'u': case 'v': case 'w': case 'x':
 199     case 'y': case 'z':
 200     case '{': case '|': case '}': case '~':
 201       return 1;
 202     default:
 203       return 0;
 204     }
 205 #endif
 206 }
 207
 208 bool
 209 c_isprint (int c)
 210 {
 211 #if C_CTYPE_ASCII
 212   return (c >= ' ' && c <= '~');
 213 #else
 214   switch (c)
 215     {
 216     case ' ': case '!': case '"': case '#': case '$': case '%':
 217     case '&': case '\'': case '(': case ')': case '*': case '+':
 218     case ',': case '-': case '.': case '/':
 219     case '0': case '1': case '2': case '3': case '4': case '5':
 220     case '6': case '7': case '8': case '9':
 221     case ':': case ';': case '<': case '=': case '>': case '?':
 222     case '@':
 223     case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
 224     case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
 225     case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
 226     case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
 227     case 'Y': case 'Z':
 228     case '[': case '\\': case ']': case '^': case '_': case '`':
 229     case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
 230     case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
 231     case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
 232     case 's': case 't': case 'u': case 'v': case 'w': case 'x':
 233     case 'y': case 'z':
 234     case '{': case '|': case '}': case '~':
 235       return 1;
 236     default:
 237       return 0;
 238     }
 239 #endif
 240 }
 241
 242 bool
 243 c_ispunct (int c)
 244 {
 245 #if C_CTYPE_ASCII
 246   return ((c >= '!' && c <= '~')
 247           && !((c >= '0' && c <= '9')
 248                || ((c & ~0x20) >= 'A' && (c & ~0x20) <= 'Z')));
 249 #else
 250   switch (c)
 251     {
 252     case '!': case '"': case '#': case '$': case '%': case '&':
 253     case '\'': case '(': case ')': case '*': case '+': case ',':
 254     case '-': case '.': case '/':
 255     case ':': case ';': case '<': case '=': case '>': case '?':
 256     case '@':
 257     case '[': case '\\': case ']': case '^': case '_': case '`':
 258     case '{': case '|': case '}': case '~':
 259       return 1;
 260     default:
 261       return 0;
 262     }
 263 #endif
 264 }
 265
 266 bool
 267 c_isspace (int c)
 268 {
 269   return (c == ' ' || c == '\t'
 270           || c == '\n' || c == '\v' || c == '\f' || c == '\r');
 271 }
 272
 273 bool
 274 c_isupper (int c)
 275 {
 276 #if C_CTYPE_CONSECUTIVE_UPPERCASE
 277   return (c >= 'A' && c <= 'Z');
 278 #else
 279   switch (c)
 280     {
 281     case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
 282     case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
 283     case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
 284     case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
 285     case 'Y': case 'Z':
 286       return 1;
 287     default:
 288       return 0;
 289     }
 290 #endif
 291 }
 292
 293 bool
 294 c_isxdigit (int c)
 295 {
 296 #if C_CTYPE_CONSECUTIVE_DIGITS \
 297     && C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
 298 #if C_CTYPE_ASCII
 299   return ((c >= '0' && c <= '9')
 300           || ((c & ~0x20) >= 'A' && (c & ~0x20) <= 'F'));
 301 #else
 302   return ((c >= '0' && c <= '9')
 303           || (c >= 'A' && c <= 'F')
 304           || (c >= 'a' && c <= 'f'));
 305 #endif
 306 #else
 307   switch (c)
 308     {
 309     case '0': case '1': case '2': case '3': case '4': case '5':
 310     case '6': case '7': case '8': case '9':
 311     case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
 312     case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
 313       return 1;
 314     default:
 315       return 0;
 316     }
 317 #endif
 318 }
 319
 320 int
 321 c_tolower (int c)
 322 {
 323 #if C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
 324   return (c >= 'A' && c <= 'Z' ? c - 'A' + 'a' : c);
 325 #else
 326   switch (c)
 327     {
 328     case 'A': return 'a';
 329     case 'B': return 'b';
 330     case 'C': return 'c';
 331     case 'D': return 'd';
 332     case 'E': return 'e';
 333     case 'F': return 'f';
 334     case 'G': return 'g';
 335     case 'H': return 'h';
 336     case 'I': return 'i';
 337     case 'J': return 'j';
 338     case 'K': return 'k';
 339     case 'L': return 'l';
 340     case 'M': return 'm';
 341     case 'N': return 'n';
 342     case 'O': return 'o';
 343     case 'P': return 'p';
 344     case 'Q': return 'q';
 345     case 'R': return 'r';
 346     case 'S': return 's';
 347     case 'T': return 't';
 348     case 'U': return 'u';
 349     case 'V': return 'v';
 350     case 'W': return 'w';
 351     case 'X': return 'x';
 352     case 'Y': return 'y';
 353     case 'Z': return 'z';
 354     default: return c;
 355     }
 356 #endif
 357 }
 358
 359 int
 360 c_toupper (int c)
 361 {
 362 #if C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
 363   return (c >= 'a' && c <= 'z' ? c - 'a' + 'A' : c);
 364 #else
 365   switch (c)
 366     {
 367     case 'a': return 'A';
 368     case 'b': return 'B';
 369     case 'c': return 'C';
 370     case 'd': return 'D';
 371     case 'e': return 'E';
 372     case 'f': return 'F';
 373     case 'g': return 'G';
 374     case 'h': return 'H';
 375     case 'i': return 'I';
 376     case 'j': return 'J';
 377     case 'k': return 'K';
 378     case 'l': return 'L';
 379     case 'm': return 'M';
 380     case 'n': return 'N';
 381     case 'o': return 'O';
 382     case 'p': return 'P';
 383     case 'q': return 'Q';
 384     case 'r': return 'R';
 385     case 's': return 'S';
 386     case 't': return 'T';
 387     case 'u': return 'U';
 388     case 'v': return 'V';
 389     case 'w': return 'W';
 390     case 'x': return 'X';
 391     case 'y': return 'Y';
 392     case 'z': return 'Z';
 393     default: return c;
 394     }
 395 #endif
 396 }