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