tools/include/nolibc/ctype.h

   1 /* SPDX-License-Identifier: LGPL-2.1 OR MIT */
   2 /*
   3  * ctype function definitions for NOLIBC
   4  * Copyright (C) 2017-2021 Willy Tarreau <w@1wt.eu>
   5  */
   6
   7 #ifndef _NOLIBC_CTYPE_H
   8 #define _NOLIBC_CTYPE_H
   9
  10 #include "std.h"
  11
  12 /*
  13  * As much as possible, please keep functions alphabetically sorted.
  14  */
  15
  16 static __attribute__((unused))
  17 int isascii(int c)
  18 {
  19         /* 0x00..0x7f */
  20         return (unsigned int)c <= 0x7f;
  21 }
  22
  23 static __attribute__((unused))
  24 int isblank(int c)
  25 {
  26         return c == '\t' || c == ' ';
  27 }
  28
  29 static __attribute__((unused))
  30 int iscntrl(int c)
  31 {
  32         /* 0x00..0x1f, 0x7f */
  33         return (unsigned int)c < 0x20 || c == 0x7f;
  34 }
  35
  36 static __attribute__((unused))
  37 int isdigit(int c)
  38 {
  39         return (unsigned int)(c - '0') < 10;
  40 }
  41
  42 static __attribute__((unused))
  43 int isgraph(int c)
  44 {
  45         /* 0x21..0x7e */
  46         return (unsigned int)(c - 0x21) < 0x5e;
  47 }
  48
  49 static __attribute__((unused))
  50 int islower(int c)
  51 {
  52         return (unsigned int)(c - 'a') < 26;
  53 }
  54
  55 static __attribute__((unused))
  56 int isprint(int c)
  57 {
  58         /* 0x20..0x7e */
  59         return (unsigned int)(c - 0x20) < 0x5f;
  60 }
  61
  62 static __attribute__((unused))
  63 int isspace(int c)
  64 {
  65         /* \t is 0x9, \n is 0xA, \v is 0xB, \f is 0xC, \r is 0xD */
  66         return ((unsigned int)c == ' ') || (unsigned int)(c - 0x09) < 5;
  67 }
  68
  69 static __attribute__((unused))
  70 int isupper(int c)
  71 {
  72         return (unsigned int)(c - 'A') < 26;
  73 }
  74
  75 static __attribute__((unused))
  76 int isxdigit(int c)
  77 {
  78         return isdigit(c) || (unsigned int)(c - 'A') < 6 || (unsigned int)(c - 'a') < 6;
  79 }
  80
  81 static __attribute__((unused))
  82 int isalpha(int c)
  83 {
  84         return islower(c) || isupper(c);
  85 }
  86
  87 static __attribute__((unused))
  88 int isalnum(int c)
  89 {
  90         return isalpha(c) || isdigit(c);
  91 }
  92
  93 static __attribute__((unused))
  94 int ispunct(int c)
  95 {
  96         return isgraph(c) && !isalnum(c);
  97 }
  98
  99 /* make sure to include all global symbols */
 100 #include "nolibc.h"
 101
 102 #endif /* _NOLIBC_CTYPE_H */