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/*
* Copyright © 2005-2014 Rich Felker, et al.
* Copyright © 2017-2022 The Crust Firmware Authors.
* SPDX-License-Identifier: MIT
*/
#ifndef STDLIB_CTYPE_H
#define STDLIB_CTYPE_H
#include <stdbool.h>
#define isalpha(a) (((unsigned)(a) | 32) - 'a' < 26)
#define isascii(a) ((unsigned)(a) < 128)
#define isdigit(a) ((unsigned)(a) - '0' < 10)
#define isgraph(a) ((unsigned)(a) - 0x21 < 0x5e)
#define islower(a) ((unsigned)(a) - 'a' < 26)
#define isprint(a) ((unsigned)(a) - 0x20 < 0x5f)
#define isupper(a) ((unsigned)(a) - 'A' < 26)
#define tolower(a) ((a) | 0x20)
#define toupper(a) ((a) & 0x5f)
static inline bool
isalnum(char c)
{
return isalpha(c) || isdigit(c);
}
static inline bool
isblank(char c)
{
return c == ' ' || c == '\t';
}
static inline bool
iscntrl(char c)
{
return (unsigned)c < 0x20 || c == 0x7f;
}
static inline bool
ispunct(char c)
{
return isgraph(c) && !isalnum(c);
}
static inline bool
isspace(char c)
{
return c == ' ' || (unsigned)c - '\t' < 5;
}
static inline bool
isxdigit(char c)
{
return isdigit(c) || ((unsigned)c | 32) - 'a' < 6;
}
#endif /* STDLIB_CTYPE_H */
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