lib/dpkg/c-ctype.h

   1 /*
   2  * libdpkg - Debian packaging suite library routines
   3  * c-ctype.h - ASCII C locale-only functions
   4  *
   5  * Copyright © 2009-2014 Guillem Jover <guillem@debian.org>
   6  *
   7  * This is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  */
  20
  21 #ifndef LIBDPKG_C_CTYPE_H
  22 #define LIBDPKG_C_CTYPE_H
  23
  24 #include <stdbool.h>
  25
  26 #include <dpkg/macros.h>
  27
  28 DPKG_BEGIN_DECLS
  29
  30 #define C_CTYPE_BIT(bit)        (1 << (bit))
  31
  32 enum c_ctype_bit {
  33         C_CTYPE_BLANK = C_CTYPE_BIT(0),
  34         C_CTYPE_WHITE = C_CTYPE_BIT(1),
  35         C_CTYPE_SPACE = C_CTYPE_BIT(2),
  36         C_CTYPE_UPPER = C_CTYPE_BIT(3),
  37         C_CTYPE_LOWER = C_CTYPE_BIT(4),
  38         C_CTYPE_DIGIT = C_CTYPE_BIT(5),
  39
  40         C_CTYPE_ALPHA = C_CTYPE_UPPER | C_CTYPE_LOWER,
  41         C_CTYPE_ALNUM = C_CTYPE_ALPHA | C_CTYPE_DIGIT,
  42 };
  43
  44 bool
  45 c_isbits(int c, enum c_ctype_bit bits);
  46
  47 /**
  48  * Check if the character is [ \t].
  49  */
  50 static inline bool
  51 c_isblank(int c)
  52 {
  53         return c_isbits(c, C_CTYPE_BLANK);
  54 }
  55
  56 /**
  57  * Check if the character is [ \t\n].
  58  */
  59 static inline bool
  60 c_iswhite(int c)
  61 {
  62         return c_isbits(c, C_CTYPE_WHITE);
  63 }
  64
  65 /**
  66  * Check if the character is [ \v\t\f\r\n].
  67  */
  68 static inline bool
  69 c_isspace(int c)
  70 {
  71         return c_isbits(c, C_CTYPE_SPACE);
  72 }
  73
  74 /**
  75  * Check if the character is [0-9].
  76  */
  77 static inline bool
  78 c_isdigit(int c)
  79 {
  80         return c_isbits(c, C_CTYPE_DIGIT);
  81 }
  82
  83 /**
  84  * Check if the character is [A-Z].
  85  */
  86 static inline bool
  87 c_isupper(int c)
  88 {
  89         return c_isbits(c, C_CTYPE_UPPER);
  90 }
  91
  92 /**
  93  * Check if the character is [a-z].
  94  */
  95 static inline bool
  96 c_islower(int c)
  97 {
  98         return c_isbits(c, C_CTYPE_LOWER);
  99 }
 100
 101 /**
 102  * Check if the character is [a-zA-Z].
 103  */
 104 static inline bool
 105 c_isalpha(int c)
 106 {
 107         return c_isbits(c, C_CTYPE_ALPHA);
 108 }
 109
 110 /**
 111  * Check if the character is [a-zA-Z0-9].
 112  */
 113 static inline bool
 114 c_isalnum(int c)
 115 {
 116         return c_isbits(c, C_CTYPE_ALNUM);
 117 }
 118
 119 /**
 120  * Maps the character to its lower-case form.
 121  */
 122 static inline int
 123 c_tolower(int c)
 124 {
 125         return (c_isupper(c) ?
 126                 (DPKG_STATIC_CAST(unsigned char, c) & ~0x20) | 0x20 : c);
 127 }
 128
 129 DPKG_END_DECLS
 130
 131 #endif