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/* <ctype.h> replacement macros.
Copyright (C) 2000, 2001 Free Software Foundation, Inc.
Contributed by Zack Weinberg <>.
This file is part of the libiberty library.
Libiberty is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
Libiberty is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with libiberty; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* This is a compatible replacement of the standard C library's <ctype.h>
with the following properties:
- Implements all isxxx() macros required by C99.
- Also implements some character classes useful when
parsing C-like languages.
- Does not change behavior depending on the current locale.
- Behaves properly for all values in the range of a signed or
unsigned char.
To avoid conflicts, this header defines the isxxx functions in upper
case, e.g. ISALPHA not isalpha. */
#ifndef SAFE_CTYPE_H
#define SAFE_CTYPE_H
#ifdef isalpha
#error "safe-ctype.h and ctype.h may not be used simultaneously"
/* Categories. */
enum {
/* In C99 */
_sch_isblank = 0x0001, /* space \t */
_sch_iscntrl = 0x0002, /* nonprinting characters */
_sch_isdigit = 0x0004, /* 0-9 */
_sch_islower = 0x0008, /* a-z */
_sch_isprint = 0x0010, /* any printing character including ' ' */
_sch_ispunct = 0x0020, /* all punctuation */
_sch_isspace = 0x0040, /* space \t \n \r \f \v */
_sch_isupper = 0x0080, /* A-Z */
_sch_isxdigit = 0x0100, /* 0-9A-Fa-f */
/* Extra categories useful to cpplib. */
_sch_isidst = 0x0200, /* A-Za-z_ */
_sch_isvsp = 0x0400, /* \n \r */
_sch_isnvsp = 0x0800, /* space \t \f \v \0 */
/* Combinations of the above. */
_sch_isalpha = _sch_isupper|_sch_islower, /* A-Za-z */
_sch_isalnum = _sch_isalpha|_sch_isdigit, /* A-Za-z0-9 */
_sch_isidnum = _sch_isidst|_sch_isdigit, /* A-Za-z0-9_ */
_sch_isgraph = _sch_isalnum|_sch_ispunct, /* isprint and not space */
_sch_iscppsp = _sch_isvsp|_sch_isnvsp, /* isspace + \0 */
_sch_isbasic = _sch_isprint|_sch_iscppsp /* basic charset of ISO C
(plus ` and @) */
/* Character classification. */
extern const unsigned short _sch_istable[256];
#define _sch_test(c, bit) (_sch_istable[(c) & 0xff] & (unsigned short)(bit))
#define ISALPHA(c) _sch_test(c, _sch_isalpha)
#define ISALNUM(c) _sch_test(c, _sch_isalnum)
#define ISBLANK(c) _sch_test(c, _sch_isblank)
#define ISCNTRL(c) _sch_test(c, _sch_iscntrl)
#define ISDIGIT(c) _sch_test(c, _sch_isdigit)
#define ISGRAPH(c) _sch_test(c, _sch_isgraph)
#define ISLOWER(c) _sch_test(c, _sch_islower)
#define ISPRINT(c) _sch_test(c, _sch_isprint)
#define ISPUNCT(c) _sch_test(c, _sch_ispunct)
#define ISSPACE(c) _sch_test(c, _sch_isspace)
#define ISUPPER(c) _sch_test(c, _sch_isupper)
#define ISXDIGIT(c) _sch_test(c, _sch_isxdigit)
#define ISIDNUM(c) _sch_test(c, _sch_isidnum)
#define ISIDST(c) _sch_test(c, _sch_isidst)
#define IS_ISOBASIC(c) _sch_test(c, _sch_isbasic)
#define IS_VSPACE(c) _sch_test(c, _sch_isvsp)
#define IS_NVSPACE(c) _sch_test(c, _sch_isnvsp)
#define IS_SPACE_OR_NUL(c) _sch_test(c, _sch_iscppsp)
/* Character transformation. */
extern const unsigned char _sch_toupper[256];
extern const unsigned char _sch_tolower[256];
#define TOUPPER(c) _sch_toupper[(c) & 0xff]
#define TOLOWER(c) _sch_tolower[(c) & 0xff]
#endif /* no ctype.h */
#endif /* SAFE_CTYPE_H */
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