1: /* Character handling in C locale.
    2: 
    3:    These functions work like the corresponding functions in <ctype.h>,
    4:    except that they have the C (POSIX) locale hardwired, whereas the
    5:    <ctype.h> functions' behaviour depends on the current locale set via
    6:    setlocale.
    7: 
    8:    Copyright (C) 2000-2003, 2006 Free Software Foundation, Inc.
    9: 
   10: This program is free software; you can redistribute it and/or modify
   11: it under the terms of the GNU General Public License as published by
   12: the Free Software Foundation; either version 2 of the License, or
   13: (at your option) any later version.
   14: 
   15: This program is distributed in the hope that it will be useful,
   16: but WITHOUT ANY WARRANTY; without even the implied warranty of
   17: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   18: GNU General Public License for more details.
   19: 
   20: You should have received a copy of the GNU General Public License
   21: along with this program; if not, write to the Free Software Foundation,
   22: Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
   23: 
   24: #ifndef C_CTYPE_H
   25: #define C_CTYPE_H
   26: 
   27: #include <stdbool.h>
   28: 
   29: 
   30: #ifdef __cplusplus
   31: extern "C" {
   32: #endif
   33: 
   34: 
   35: /* The functions defined in this file assume the "C" locale and a character
   36:    set without diacritics (ASCII-US or EBCDIC-US or something like that).
   37:    Even if the "C" locale on a particular system is an extension of the ASCII
   38:    character set (like on BeOS, where it is UTF-8, or on AmigaOS, where it
   39:    is ISO-8859-1), the functions in this file recognize only the ASCII
   40:    characters.  */
   41: 
   42: 
   43: /* Check whether the ASCII optimizations apply. */
   44: 
   45: /* ANSI C89 (and ISO C99 5.2.1.3 too) already guarantees that
   46:    '0', '1', ..., '9' have consecutive integer values.  */
   47: #define C_CTYPE_CONSECUTIVE_DIGITS 1
   48: 
   49: #if ('A' <= 'Z') \
   50:     && ('A' + 1 == 'B') && ('B' + 1 == 'C') && ('C' + 1 == 'D') \
   51:     && ('D' + 1 == 'E') && ('E' + 1 == 'F') && ('F' + 1 == 'G') \
   52:     && ('G' + 1 == 'H') && ('H' + 1 == 'I') && ('I' + 1 == 'J') \
   53:     && ('J' + 1 == 'K') && ('K' + 1 == 'L') && ('L' + 1 == 'M') \
   54:     && ('M' + 1 == 'N') && ('N' + 1 == 'O') && ('O' + 1 == 'P') \
   55:     && ('P' + 1 == 'Q') && ('Q' + 1 == 'R') && ('R' + 1 == 'S') \
   56:     && ('S' + 1 == 'T') && ('T' + 1 == 'U') && ('U' + 1 == 'V') \
   57:     && ('V' + 1 == 'W') && ('W' + 1 == 'X') && ('X' + 1 == 'Y') \
   58:     && ('Y' + 1 == 'Z')
   59: #define C_CTYPE_CONSECUTIVE_UPPERCASE 1
   60: #endif
   61: 
   62: #if ('a' <= 'z') \
   63:     && ('a' + 1 == 'b') && ('b' + 1 == 'c') && ('c' + 1 == 'd') \
   64:     && ('d' + 1 == 'e') && ('e' + 1 == 'f') && ('f' + 1 == 'g') \
   65:     && ('g' + 1 == 'h') && ('h' + 1 == 'i') && ('i' + 1 == 'j') \
   66:     && ('j' + 1 == 'k') && ('k' + 1 == 'l') && ('l' + 1 == 'm') \
   67:     && ('m' + 1 == 'n') && ('n' + 1 == 'o') && ('o' + 1 == 'p') \
   68:     && ('p' + 1 == 'q') && ('q' + 1 == 'r') && ('r' + 1 == 's') \
   69:     && ('s' + 1 == 't') && ('t' + 1 == 'u') && ('u' + 1 == 'v') \
   70:     && ('v' + 1 == 'w') && ('w' + 1 == 'x') && ('x' + 1 == 'y') \
   71:     && ('y' + 1 == 'z')
   72: #define C_CTYPE_CONSECUTIVE_LOWERCASE 1
   73: #endif
   74: 
   75: #if (' ' == 32) && ('!' == 33) && ('"' == 34) && ('#' == 35) \
   76:     && ('%' == 37) && ('&' == 38) && ('\'' == 39) && ('(' == 40) \
   77:     && (')' == 41) && ('*' == 42) && ('+' == 43) && (',' == 44) \
   78:     && ('-' == 45) && ('.' == 46) && ('/' == 47) && ('0' == 48) \
   79:     && ('1' == 49) && ('2' == 50) && ('3' == 51) && ('4' == 52) \
   80:     && ('5' == 53) && ('6' == 54) && ('7' == 55) && ('8' == 56) \
   81:     && ('9' == 57) && (':' == 58) && (';' == 59) && ('<' == 60) \
   82:     && ('=' == 61) && ('>' == 62) && ('?' == 63) && ('A' == 65) \
   83:     && ('B' == 66) && ('C' == 67) && ('D' == 68) && ('E' == 69) \
   84:     && ('F' == 70) && ('G' == 71) && ('H' == 72) && ('I' == 73) \
   85:     && ('J' == 74) && ('K' == 75) && ('L' == 76) && ('M' == 77) \
   86:     && ('N' == 78) && ('O' == 79) && ('P' == 80) && ('Q' == 81) \
   87:     && ('R' == 82) && ('S' == 83) && ('T' == 84) && ('U' == 85) \
   88:     && ('V' == 86) && ('W' == 87) && ('X' == 88) && ('Y' == 89) \
   89:     && ('Z' == 90) && ('[' == 91) && ('\\' == 92) && (']' == 93) \
   90:     && ('^' == 94) && ('_' == 95) && ('a' == 97) && ('b' == 98) \
   91:     && ('c' == 99) && ('d' == 100) && ('e' == 101) && ('f' == 102) \
   92:     && ('g' == 103) && ('h' == 104) && ('i' == 105) && ('j' == 106) \
   93:     && ('k' == 107) && ('l' == 108) && ('m' == 109) && ('n' == 110) \
   94:     && ('o' == 111) && ('p' == 112) && ('q' == 113) && ('r' == 114) \
   95:     && ('s' == 115) && ('t' == 116) && ('u' == 117) && ('v' == 118) \
   96:     && ('w' == 119) && ('x' == 120) && ('y' == 121) && ('z' == 122) \
   97:     && ('{' == 123) && ('|' == 124) && ('}' == 125) && ('~' == 126)
   98: /* The character set is ASCII or one of its variants or extensions, not EBCDIC.
   99:    Testing the value of '\n' and '\r' is not relevant.  */
  100: #define C_CTYPE_ASCII 1
  101: #endif
  102: 
  103: 
  104: /* Function declarations. */
  105: 
  106: extern bool c_isascii (int c); /* not locale dependent */
  107: 
  108: extern bool c_isalnum (int c);
  109: extern bool c_isalpha (int c);
  110: extern bool c_isblank (int c);
  111: extern bool c_iscntrl (int c);
  112: extern bool c_isdigit (int c);
  113: extern bool c_islower (int c);
  114: extern bool c_isgraph (int c);
  115: extern bool c_isprint (int c);
  116: extern bool c_ispunct (int c);
  117: extern bool c_isspace (int c);
  118: extern bool c_isupper (int c);
  119: extern bool c_isxdigit (int c);
  120: 
  121: extern int c_tolower (int c);
  122: extern int c_toupper (int c);
  123: 
  124: 
  125: #if defined __GNUC__ && defined __OPTIMIZE__ && !defined __OPTIMIZE_SIZE__ && !defined NO_C_CTYPE_MACROS
  126: 
  127: /* ASCII optimizations. */
  128: 
  129: #undef c_isascii
  130: #define c_isascii(c) \
  131:   ({ int __c = (c); \
  132:      (__c >= 0x00 && __c <= 0x7f); \
  133:    })
  134: 
  135: #if C_CTYPE_CONSECUTIVE_DIGITS \
  136:     && C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
  137: #if C_CTYPE_ASCII
  138: #undef c_isalnum
  139: #define c_isalnum(c) \
  140:   ({ int __c = (c); \
  141:      ((__c >= '0' && __c <= '9') \
  142:       || ((__c & ~0x20) >= 'A' && (__c & ~0x20) <= 'Z')); \
  143:    })
  144: #else
  145: #undef c_isalnum
  146: #define c_isalnum(c) \
  147:   ({ int __c = (c); \
  148:      ((__c >= '0' && __c <= '9') \
  149:       || (__c >= 'A' && __c <= 'Z') \
  150:       || (__c >= 'a' && __c <= 'z')); \
  151:    })
  152: #endif
  153: #endif
  154: 
  155: #if C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
  156: #if C_CTYPE_ASCII
  157: #undef c_isalpha
  158: #define c_isalpha(c) \
  159:   ({ int __c = (c); \
  160:      ((__c & ~0x20) >= 'A' && (__c & ~0x20) <= 'Z'); \
  161:    })
  162: #else
  163: #undef c_isalpha
  164: #define c_isalpha(c) \
  165:   ({ int __c = (c); \
  166:      ((__c >= 'A' && __c <= 'Z') || (__c >= 'a' && __c <= 'z')); \
  167:    })
  168: #endif
  169: #endif
  170: 
  171: #undef c_isblank
  172: #define c_isblank(c) \
  173:   ({ int __c = (c); \
  174:      (__c == ' ' || __c == '\t'); \
  175:    })
  176: 
  177: #if C_CTYPE_ASCII
  178: #undef c_iscntrl
  179: #define c_iscntrl(c) \
  180:   ({ int __c = (c); \
  181:      ((__c & ~0x1f) == 0 || __c == 0x7f); \
  182:    })
  183: #endif
  184: 
  185: #if C_CTYPE_CONSECUTIVE_DIGITS
  186: #undef c_isdigit
  187: #define c_isdigit(c) \
  188:   ({ int __c = (c); \
  189:      (__c >= '0' && __c <= '9'); \
  190:    })
  191: #endif
  192: 
  193: #if C_CTYPE_CONSECUTIVE_LOWERCASE
  194: #undef c_islower
  195: #define c_islower(c) \
  196:   ({ int __c = (c); \
  197:      (__c >= 'a' && __c <= 'z'); \
  198:    })
  199: #endif
  200: 
  201: #if C_CTYPE_ASCII
  202: #undef c_isgraph
  203: #define c_isgraph(c) \
  204:   ({ int __c = (c); \
  205:      (__c >= '!' && __c <= '~'); \
  206:    })
  207: #endif
  208: 
  209: #if C_CTYPE_ASCII
  210: #undef c_isprint
  211: #define c_isprint(c) \
  212:   ({ int __c = (c); \
  213:      (__c >= ' ' && __c <= '~'); \
  214:    })
  215: #endif
  216: 
  217: #if C_CTYPE_ASCII
  218: #undef c_ispunct
  219: #define c_ispunct(c) \
  220:   ({ int _c = (c); \
  221:      (c_isgraph (_c) && ! c_isalnum (_c)); \
  222:    })
  223: #endif
  224: 
  225: #undef c_isspace
  226: #define c_isspace(c) \
  227:   ({ int __c = (c); \
  228:      (__c == ' ' || __c == '\t' \
  229:       || __c == '\n' || __c == '\v' || __c == '\f' || __c == '\r'); \
  230:    })
  231: 
  232: #if C_CTYPE_CONSECUTIVE_UPPERCASE
  233: #undef c_isupper
  234: #define c_isupper(c) \
  235:   ({ int __c = (c); \
  236:      (__c >= 'A' && __c <= 'Z'); \
  237:    })
  238: #endif
  239: 
  240: #if C_CTYPE_CONSECUTIVE_DIGITS \
  241:     && C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
  242: #if C_CTYPE_ASCII
  243: #undef c_isxdigit
  244: #define c_isxdigit(c) \
  245:   ({ int __c = (c); \
  246:      ((__c >= '0' && __c <= '9') \
  247:       || ((__c & ~0x20) >= 'A' && (__c & ~0x20) <= 'F')); \
  248:    })
  249: #else
  250: #undef c_isxdigit
  251: #define c_isxdigit(c) \
  252:   ({ int __c = (c); \
  253:      ((__c >= '0' && __c <= '9') \
  254:       || (__c >= 'A' && __c <= 'F') \
  255:       || (__c >= 'a' && __c <= 'f')); \
  256:    })
  257: #endif
  258: #endif
  259: 
  260: #if C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
  261: #undef c_tolower
  262: #define c_tolower(c) \
  263:   ({ int __c = (c); \
  264:      (__c >= 'A' && __c <= 'Z' ? __c - 'A' + 'a' : __c); \
  265:    })
  266: #undef c_toupper
  267: #define c_toupper(c) \
  268:   ({ int __c = (c); \
  269:      (__c >= 'a' && __c <= 'z' ? __c - 'a' + 'A' : __c); \
  270:    })
  271: #endif
  272: 
  273: #endif /* optimizing for speed */
  274: 
  275: 
  276: #ifdef __cplusplus
  277: }
  278: #endif
  279: 
  280: #endif /* C_CTYPE_H */