src/translit.h

   1 /* coded by Ketmar // Vampire Avalon (psyc://ketmar.no-ip.org/~Ketmar)
   2  * Understanding is not required. Only obedience.
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 #ifndef _TRANSLIT_H_
  18 #define _TRANSLIT_H_
  19
  20
  21 // free() the result (it will never be NULL)
  22 // also converts to lower case
  23 extern char *translitstr (const char *src);
  24
  25
  26 /****************************************************************************/
  27 /* char up/down                                                             */
  28 /****************************************************************************/
  29 /* koi8-u */
  30 static inline int le2lower (int ch) {
  31   ch &= 0xff;
  32   if (ch < 128) {
  33     if (ch >= 'A' && ch <= 'Z') ch += 32;
  34   } else {
  35     if (ch >= 224 && ch <= 255) ch -= 32;
  36     else {
  37       switch (ch) {
  38         case 179: case 180: case 182: case 183: case 189: ch -= 16; break;
  39       }
  40     }
  41   }
  42   return ch;
  43 }
  44
  45
  46 static inline int le2upper (int ch) {
  47   ch &= 0xff;
  48   if (ch < 128) {
  49     if (ch >= 'a' && ch <= 'z') ch -= 32;
  50   } else {
  51     if (ch >= 192 && ch <= 223) ch += 32;
  52     else {
  53       switch (ch) {
  54         case 163: case 164: case 166: case 167: case 173: ch += 16; break;
  55       }
  56     }
  57   }
  58   return ch;
  59 }
  60
  61
  62 static inline int leIsAlpha (int ch) {
  63   ch &= 0xff;
  64   if (ch >= 'A' && ch <= 'Z') return 1;
  65   if (ch >= 'a' && ch <= 'z') return 1;
  66   if (ch >= 192) return 1;
  67   switch (ch) {
  68     case 163: case 164: case 166: case 167: case 173:
  69     case 179: case 180: case 182: case 183: case 189:
  70       return 1;
  71   }
  72   return 0;
  73 }
  74
  75
  76
  77 static inline int leIsDigit (int ch) { return ch >= '0' && ch <= '9'; }
  78 static inline int leIsXDigit (int ch) { ch = le2upper(ch); return leIsDigit(ch) || (ch >= 'A' && ch <= 'F'); }
  79 static inline int leIsAlNum (int ch) { return leIsDigit(ch) || leIsAlpha(ch); }
  80 static inline int leIsUpper (int ch) { return leIsAlpha(ch) && ch == le2upper(ch); }
  81 static inline int leIsLower (int ch) { return leIsAlpha(ch) && ch == le2lower(ch); }
  82 static inline int leIsSpace (int ch) { return (ch && (ch&0xff) <= 32); }
  83
  84
  85 #endif