1 /* Character handling in C locale.
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
8 Copyright (C) 2000-2003, 2006, 2008 Free Software Foundation, Inc.
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 3 of the License, or
13 (at your option) any later version.
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.
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. */
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
43 /* Check whether the ASCII optimizations apply. */
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
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') \
59 #define C_CTYPE_CONSECUTIVE_UPPERCASE 1
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') \
72 #define C_CTYPE_CONSECUTIVE_LOWERCASE 1
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
104 /* Function declarations. */
106 /* Unlike the functions in <ctype.h>, which require an argument in the range
107 of the 'unsigned char' type, the functions here operate on values that are
108 in the 'unsigned char' range or in the 'char' range. In other words,
109 when you have a 'char' value, you need to cast it before using it as
110 argument to a <ctype.h> function:
113 if (isalpha ((unsigned char) *s)) ...
115 but you don't need to cast it for the functions defined in this file:
118 if (c_isalpha (*s)) ...
121 extern bool c_isascii (int c
); /* not locale dependent */
123 extern bool c_isalnum (int c
);
124 extern bool c_isalpha (int c
);
125 extern bool c_isblank (int c
);
126 extern bool c_iscntrl (int c
);
127 extern bool c_isdigit (int c
);
128 extern bool c_islower (int c
);
129 extern bool c_isgraph (int c
);
130 extern bool c_isprint (int c
);
131 extern bool c_ispunct (int c
);
132 extern bool c_isspace (int c
);
133 extern bool c_isupper (int c
);
134 extern bool c_isxdigit (int c
);
136 extern int c_tolower (int c
);
137 extern int c_toupper (int c
);
140 #if defined __GNUC__ && defined __OPTIMIZE__ && !defined __OPTIMIZE_SIZE__ && !defined NO_C_CTYPE_MACROS
142 /* ASCII optimizations. */
145 #define c_isascii(c) \
147 (__c >= 0x00 && __c <= 0x7f); \
150 #if C_CTYPE_CONSECUTIVE_DIGITS \
151 && C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
154 #define c_isalnum(c) \
156 ((__c >= '0' && __c <= '9') \
157 || ((__c & ~0x20) >= 'A' && (__c & ~0x20) <= 'Z')); \
161 #define c_isalnum(c) \
163 ((__c >= '0' && __c <= '9') \
164 || (__c >= 'A' && __c <= 'Z') \
165 || (__c >= 'a' && __c <= 'z')); \
170 #if C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
173 #define c_isalpha(c) \
175 ((__c & ~0x20) >= 'A' && (__c & ~0x20) <= 'Z'); \
179 #define c_isalpha(c) \
181 ((__c >= 'A' && __c <= 'Z') || (__c >= 'a' && __c <= 'z')); \
187 #define c_isblank(c) \
189 (__c == ' ' || __c == '\t'); \
194 #define c_iscntrl(c) \
196 ((__c & ~0x1f) == 0 || __c == 0x7f); \
200 #if C_CTYPE_CONSECUTIVE_DIGITS
202 #define c_isdigit(c) \
204 (__c >= '0' && __c <= '9'); \
208 #if C_CTYPE_CONSECUTIVE_LOWERCASE
210 #define c_islower(c) \
212 (__c >= 'a' && __c <= 'z'); \
218 #define c_isgraph(c) \
220 (__c >= '!' && __c <= '~'); \
226 #define c_isprint(c) \
228 (__c >= ' ' && __c <= '~'); \
234 #define c_ispunct(c) \
236 (c_isgraph (_c) && ! c_isalnum (_c)); \
241 #define c_isspace(c) \
243 (__c == ' ' || __c == '\t' \
244 || __c == '\n' || __c == '\v' || __c == '\f' || __c == '\r'); \
247 #if C_CTYPE_CONSECUTIVE_UPPERCASE
249 #define c_isupper(c) \
251 (__c >= 'A' && __c <= 'Z'); \
255 #if C_CTYPE_CONSECUTIVE_DIGITS \
256 && C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
259 #define c_isxdigit(c) \
261 ((__c >= '0' && __c <= '9') \
262 || ((__c & ~0x20) >= 'A' && (__c & ~0x20) <= 'F')); \
266 #define c_isxdigit(c) \
268 ((__c >= '0' && __c <= '9') \
269 || (__c >= 'A' && __c <= 'F') \
270 || (__c >= 'a' && __c <= 'f')); \
275 #if C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
277 #define c_tolower(c) \
279 (__c >= 'A' && __c <= 'Z' ? __c - 'A' + 'a' : __c); \
282 #define c_toupper(c) \
284 (__c >= 'a' && __c <= 'z' ? __c - 'a' + 'A' : __c); \
288 #endif /* optimizing for speed */
295 #endif /* C_CTYPE_H */