| 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, 2008-2014 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 Lesser 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 Lesser General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU Lesser General Public License |
| 21 | along with this program; if not, see <http://www.gnu.org/licenses/>. */ |
| 22 | |
| 23 | #ifndef C_CTYPE_H |
| 24 | #define C_CTYPE_H |
| 25 | |
| 26 | #include <stdbool.h> |
| 27 | |
| 28 | |
| 29 | #ifdef __cplusplus |
| 30 | extern "C" { |
| 31 | #endif |
| 32 | |
| 33 | |
| 34 | /* The functions defined in this file assume the "C" locale and a character |
| 35 | set without diacritics (ASCII-US or EBCDIC-US or something like that). |
| 36 | Even if the "C" locale on a particular system is an extension of the ASCII |
| 37 | character set (like on BeOS, where it is UTF-8, or on AmigaOS, where it |
| 38 | is ISO-8859-1), the functions in this file recognize only the ASCII |
| 39 | characters. */ |
| 40 | |
| 41 | |
| 42 | /* Check whether the ASCII optimizations apply. */ |
| 43 | |
| 44 | /* ANSI C89 (and ISO C99 5.2.1.3 too) already guarantees that |
| 45 | '0', '1', ..., '9' have consecutive integer values. */ |
| 46 | #define C_CTYPE_CONSECUTIVE_DIGITS 1 |
| 47 | |
| 48 | #if ('A' <= 'Z') \ |
| 49 | && ('A' + 1 == 'B') && ('B' + 1 == 'C') && ('C' + 1 == 'D') \ |
| 50 | && ('D' + 1 == 'E') && ('E' + 1 == 'F') && ('F' + 1 == 'G') \ |
| 51 | && ('G' + 1 == 'H') && ('H' + 1 == 'I') && ('I' + 1 == 'J') \ |
| 52 | && ('J' + 1 == 'K') && ('K' + 1 == 'L') && ('L' + 1 == 'M') \ |
| 53 | && ('M' + 1 == 'N') && ('N' + 1 == 'O') && ('O' + 1 == 'P') \ |
| 54 | && ('P' + 1 == 'Q') && ('Q' + 1 == 'R') && ('R' + 1 == 'S') \ |
| 55 | && ('S' + 1 == 'T') && ('T' + 1 == 'U') && ('U' + 1 == 'V') \ |
| 56 | && ('V' + 1 == 'W') && ('W' + 1 == 'X') && ('X' + 1 == 'Y') \ |
| 57 | && ('Y' + 1 == 'Z') |
| 58 | #define C_CTYPE_CONSECUTIVE_UPPERCASE 1 |
| 59 | #endif |
| 60 | |
| 61 | #if ('a' <= 'z') \ |
| 62 | && ('a' + 1 == 'b') && ('b' + 1 == 'c') && ('c' + 1 == 'd') \ |
| 63 | && ('d' + 1 == 'e') && ('e' + 1 == 'f') && ('f' + 1 == 'g') \ |
| 64 | && ('g' + 1 == 'h') && ('h' + 1 == 'i') && ('i' + 1 == 'j') \ |
| 65 | && ('j' + 1 == 'k') && ('k' + 1 == 'l') && ('l' + 1 == 'm') \ |
| 66 | && ('m' + 1 == 'n') && ('n' + 1 == 'o') && ('o' + 1 == 'p') \ |
| 67 | && ('p' + 1 == 'q') && ('q' + 1 == 'r') && ('r' + 1 == 's') \ |
| 68 | && ('s' + 1 == 't') && ('t' + 1 == 'u') && ('u' + 1 == 'v') \ |
| 69 | && ('v' + 1 == 'w') && ('w' + 1 == 'x') && ('x' + 1 == 'y') \ |
| 70 | && ('y' + 1 == 'z') |
| 71 | #define C_CTYPE_CONSECUTIVE_LOWERCASE 1 |
| 72 | #endif |
| 73 | |
| 74 | #if (' ' == 32) && ('!' == 33) && ('"' == 34) && ('#' == 35) \ |
| 75 | && ('%' == 37) && ('&' == 38) && ('\'' == 39) && ('(' == 40) \ |
| 76 | && (')' == 41) && ('*' == 42) && ('+' == 43) && (',' == 44) \ |
| 77 | && ('-' == 45) && ('.' == 46) && ('/' == 47) && ('0' == 48) \ |
| 78 | && ('1' == 49) && ('2' == 50) && ('3' == 51) && ('4' == 52) \ |
| 79 | && ('5' == 53) && ('6' == 54) && ('7' == 55) && ('8' == 56) \ |
| 80 | && ('9' == 57) && (':' == 58) && (';' == 59) && ('<' == 60) \ |
| 81 | && ('=' == 61) && ('>' == 62) && ('?' == 63) && ('A' == 65) \ |
| 82 | && ('B' == 66) && ('C' == 67) && ('D' == 68) && ('E' == 69) \ |
| 83 | && ('F' == 70) && ('G' == 71) && ('H' == 72) && ('I' == 73) \ |
| 84 | && ('J' == 74) && ('K' == 75) && ('L' == 76) && ('M' == 77) \ |
| 85 | && ('N' == 78) && ('O' == 79) && ('P' == 80) && ('Q' == 81) \ |
| 86 | && ('R' == 82) && ('S' == 83) && ('T' == 84) && ('U' == 85) \ |
| 87 | && ('V' == 86) && ('W' == 87) && ('X' == 88) && ('Y' == 89) \ |
| 88 | && ('Z' == 90) && ('[' == 91) && ('\\' == 92) && (']' == 93) \ |
| 89 | && ('^' == 94) && ('_' == 95) && ('a' == 97) && ('b' == 98) \ |
| 90 | && ('c' == 99) && ('d' == 100) && ('e' == 101) && ('f' == 102) \ |
| 91 | && ('g' == 103) && ('h' == 104) && ('i' == 105) && ('j' == 106) \ |
| 92 | && ('k' == 107) && ('l' == 108) && ('m' == 109) && ('n' == 110) \ |
| 93 | && ('o' == 111) && ('p' == 112) && ('q' == 113) && ('r' == 114) \ |
| 94 | && ('s' == 115) && ('t' == 116) && ('u' == 117) && ('v' == 118) \ |
| 95 | && ('w' == 119) && ('x' == 120) && ('y' == 121) && ('z' == 122) \ |
| 96 | && ('{' == 123) && ('|' == 124) && ('}' == 125) && ('~' == 126) |
| 97 | /* The character set is ASCII or one of its variants or extensions, not EBCDIC. |
| 98 | Testing the value of '\n' and '\r' is not relevant. */ |
| 99 | #define C_CTYPE_ASCII 1 |
| 100 | #endif |
| 101 | |
| 102 | |
| 103 | /* Function declarations. */ |
| 104 | |
| 105 | /* Unlike the functions in <ctype.h>, which require an argument in the range |
| 106 | of the 'unsigned char' type, the functions here operate on values that are |
| 107 | in the 'unsigned char' range or in the 'char' range. In other words, |
| 108 | when you have a 'char' value, you need to cast it before using it as |
| 109 | argument to a <ctype.h> function: |
| 110 | |
| 111 | const char *s = ...; |
| 112 | if (isalpha ((unsigned char) *s)) ... |
| 113 | |
| 114 | but you don't need to cast it for the functions defined in this file: |
| 115 | |
| 116 | const char *s = ...; |
| 117 | if (c_isalpha (*s)) ... |
| 118 | */ |
| 119 | |
| 120 | extern bool c_isascii (int c) _GL_ATTRIBUTE_CONST; /* not locale dependent */ |
| 121 | |
| 122 | extern bool c_isalnum (int c) _GL_ATTRIBUTE_CONST; |
| 123 | extern bool c_isalpha (int c) _GL_ATTRIBUTE_CONST; |
| 124 | extern bool c_isblank (int c) _GL_ATTRIBUTE_CONST; |
| 125 | extern bool c_iscntrl (int c) _GL_ATTRIBUTE_CONST; |
| 126 | extern bool c_isdigit (int c) _GL_ATTRIBUTE_CONST; |
| 127 | extern bool c_islower (int c) _GL_ATTRIBUTE_CONST; |
| 128 | extern bool c_isgraph (int c) _GL_ATTRIBUTE_CONST; |
| 129 | extern bool c_isprint (int c) _GL_ATTRIBUTE_CONST; |
| 130 | extern bool c_ispunct (int c) _GL_ATTRIBUTE_CONST; |
| 131 | extern bool c_isspace (int c) _GL_ATTRIBUTE_CONST; |
| 132 | extern bool c_isupper (int c) _GL_ATTRIBUTE_CONST; |
| 133 | extern bool c_isxdigit (int c) _GL_ATTRIBUTE_CONST; |
| 134 | |
| 135 | extern int c_tolower (int c) _GL_ATTRIBUTE_CONST; |
| 136 | extern int c_toupper (int c) _GL_ATTRIBUTE_CONST; |
| 137 | |
| 138 | |
| 139 | #if (defined __GNUC__ && !defined __STRICT_ANSI__ && defined __OPTIMIZE__ \ |
| 140 | && !defined __OPTIMIZE_SIZE__ && !defined NO_C_CTYPE_MACROS) |
| 141 | |
| 142 | /* ASCII optimizations. */ |
| 143 | |
| 144 | #undef c_isascii |
| 145 | #define c_isascii(c) \ |
| 146 | ({ int __c = (c); \ |
| 147 | (__c >= 0x00 && __c <= 0x7f); \ |
| 148 | }) |
| 149 | |
| 150 | #if C_CTYPE_CONSECUTIVE_DIGITS \ |
| 151 | && C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE |
| 152 | #if C_CTYPE_ASCII |
| 153 | #undef c_isalnum |
| 154 | #define c_isalnum(c) \ |
| 155 | ({ int __c = (c); \ |
| 156 | ((__c >= '0' && __c <= '9') \ |
| 157 | || ((__c & ~0x20) >= 'A' && (__c & ~0x20) <= 'Z')); \ |
| 158 | }) |
| 159 | #else |
| 160 | #undef c_isalnum |
| 161 | #define c_isalnum(c) \ |
| 162 | ({ int __c = (c); \ |
| 163 | ((__c >= '0' && __c <= '9') \ |
| 164 | || (__c >= 'A' && __c <= 'Z') \ |
| 165 | || (__c >= 'a' && __c <= 'z')); \ |
| 166 | }) |
| 167 | #endif |
| 168 | #endif |
| 169 | |
| 170 | #if C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE |
| 171 | #if C_CTYPE_ASCII |
| 172 | #undef c_isalpha |
| 173 | #define c_isalpha(c) \ |
| 174 | ({ int __c = (c); \ |
| 175 | ((__c & ~0x20) >= 'A' && (__c & ~0x20) <= 'Z'); \ |
| 176 | }) |
| 177 | #else |
| 178 | #undef c_isalpha |
| 179 | #define c_isalpha(c) \ |
| 180 | ({ int __c = (c); \ |
| 181 | ((__c >= 'A' && __c <= 'Z') || (__c >= 'a' && __c <= 'z')); \ |
| 182 | }) |
| 183 | #endif |
| 184 | #endif |
| 185 | |
| 186 | #undef c_isblank |
| 187 | #define c_isblank(c) \ |
| 188 | ({ int __c = (c); \ |
| 189 | (__c == ' ' || __c == '\t'); \ |
| 190 | }) |
| 191 | |
| 192 | #if C_CTYPE_ASCII |
| 193 | #undef c_iscntrl |
| 194 | #define c_iscntrl(c) \ |
| 195 | ({ int __c = (c); \ |
| 196 | ((__c & ~0x1f) == 0 || __c == 0x7f); \ |
| 197 | }) |
| 198 | #endif |
| 199 | |
| 200 | #if C_CTYPE_CONSECUTIVE_DIGITS |
| 201 | #undef c_isdigit |
| 202 | #define c_isdigit(c) \ |
| 203 | ({ int __c = (c); \ |
| 204 | (__c >= '0' && __c <= '9'); \ |
| 205 | }) |
| 206 | #endif |
| 207 | |
| 208 | #if C_CTYPE_CONSECUTIVE_LOWERCASE |
| 209 | #undef c_islower |
| 210 | #define c_islower(c) \ |
| 211 | ({ int __c = (c); \ |
| 212 | (__c >= 'a' && __c <= 'z'); \ |
| 213 | }) |
| 214 | #endif |
| 215 | |
| 216 | #if C_CTYPE_ASCII |
| 217 | #undef c_isgraph |
| 218 | #define c_isgraph(c) \ |
| 219 | ({ int __c = (c); \ |
| 220 | (__c >= '!' && __c <= '~'); \ |
| 221 | }) |
| 222 | #endif |
| 223 | |
| 224 | #if C_CTYPE_ASCII |
| 225 | #undef c_isprint |
| 226 | #define c_isprint(c) \ |
| 227 | ({ int __c = (c); \ |
| 228 | (__c >= ' ' && __c <= '~'); \ |
| 229 | }) |
| 230 | #endif |
| 231 | |
| 232 | #if C_CTYPE_ASCII |
| 233 | #undef c_ispunct |
| 234 | #define c_ispunct(c) \ |
| 235 | ({ int _c = (c); \ |
| 236 | (c_isgraph (_c) && ! c_isalnum (_c)); \ |
| 237 | }) |
| 238 | #endif |
| 239 | |
| 240 | #undef c_isspace |
| 241 | #define c_isspace(c) \ |
| 242 | ({ int __c = (c); \ |
| 243 | (__c == ' ' || __c == '\t' \ |
| 244 | || __c == '\n' || __c == '\v' || __c == '\f' || __c == '\r'); \ |
| 245 | }) |
| 246 | |
| 247 | #if C_CTYPE_CONSECUTIVE_UPPERCASE |
| 248 | #undef c_isupper |
| 249 | #define c_isupper(c) \ |
| 250 | ({ int __c = (c); \ |
| 251 | (__c >= 'A' && __c <= 'Z'); \ |
| 252 | }) |
| 253 | #endif |
| 254 | |
| 255 | #if C_CTYPE_CONSECUTIVE_DIGITS \ |
| 256 | && C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE |
| 257 | #if C_CTYPE_ASCII |
| 258 | #undef c_isxdigit |
| 259 | #define c_isxdigit(c) \ |
| 260 | ({ int __c = (c); \ |
| 261 | ((__c >= '0' && __c <= '9') \ |
| 262 | || ((__c & ~0x20) >= 'A' && (__c & ~0x20) <= 'F')); \ |
| 263 | }) |
| 264 | #else |
| 265 | #undef c_isxdigit |
| 266 | #define c_isxdigit(c) \ |
| 267 | ({ int __c = (c); \ |
| 268 | ((__c >= '0' && __c <= '9') \ |
| 269 | || (__c >= 'A' && __c <= 'F') \ |
| 270 | || (__c >= 'a' && __c <= 'f')); \ |
| 271 | }) |
| 272 | #endif |
| 273 | #endif |
| 274 | |
| 275 | #if C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE |
| 276 | #undef c_tolower |
| 277 | #define c_tolower(c) \ |
| 278 | ({ int __c = (c); \ |
| 279 | (__c >= 'A' && __c <= 'Z' ? __c - 'A' + 'a' : __c); \ |
| 280 | }) |
| 281 | #undef c_toupper |
| 282 | #define c_toupper(c) \ |
| 283 | ({ int __c = (c); \ |
| 284 | (__c >= 'a' && __c <= 'z' ? __c - 'a' + 'A' : __c); \ |
| 285 | }) |
| 286 | #endif |
| 287 | |
| 288 | #endif /* optimizing for speed */ |
| 289 | |
| 290 | |
| 291 | #ifdef __cplusplus |
| 292 | } |
| 293 | #endif |
| 294 | |
| 295 | #endif /* C_CTYPE_H */ |