safe-ctype.h revision 1.1.1.2 
1/* <ctype.h> replacement macros.
2
3   Copyright (C) 2000, 2001 Free Software Foundation, Inc.
4   Contributed by Zack Weinberg <zackw@stanford.edu>.
5
6This file is part of the libiberty library.
7Libiberty is free software; you can redistribute it and/or
8modify it under the terms of the GNU Library General Public
9License as published by the Free Software Foundation; either
10version 2 of the License, or (at your option) any later version.
11
12Libiberty is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15Library General Public License for more details.
16
17You should have received a copy of the GNU Library General Public
18License along with libiberty; see the file COPYING.LIB.  If
19not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20Boston, MA 02111-1307, USA.  */
21
22/* This is a compatible replacement of the standard C library's <ctype.h>
23   with the following properties:
24
25   - Implements all isxxx() macros required by C99.
26   - Also implements some character classes useful when
27     parsing C-like languages.
28   - Does not change behavior depending on the current locale.
29   - Behaves properly for all values in the range of a signed or
30     unsigned char.
31
32   To avoid conflicts, this header defines the isxxx functions in upper
33   case, e.g. ISALPHA not isalpha.  */
34
35#ifndef SAFE_CTYPE_H
36#define SAFE_CTYPE_H
37
38#ifdef isalpha
39 #error "safe-ctype.h and ctype.h may not be used simultaneously"
40#else
41
42/* Categories.  */
43
44enum {
45  /* In C99 */
46  _sch_isblank  = 0x0001,	/* space \t */
47  _sch_iscntrl  = 0x0002,	/* nonprinting characters */
48  _sch_isdigit  = 0x0004,	/* 0-9 */
49  _sch_islower  = 0x0008,	/* a-z */
50  _sch_isprint  = 0x0010,	/* any printing character including ' ' */
51  _sch_ispunct  = 0x0020,	/* all punctuation */
52  _sch_isspace  = 0x0040,	/* space \t \n \r \f \v */
53  _sch_isupper  = 0x0080,	/* A-Z */
54  _sch_isxdigit = 0x0100,	/* 0-9A-Fa-f */
55
56  /* Extra categories useful to cpplib.  */
57  _sch_isidst	= 0x0200,	/* A-Za-z_ */
58  _sch_isvsp    = 0x0400,	/* \n \r */
59  _sch_isnvsp   = 0x0800,	/* space \t \f \v \0 */
60
61  /* Combinations of the above.  */
62  _sch_isalpha  = _sch_isupper|_sch_islower,	/* A-Za-z */
63  _sch_isalnum  = _sch_isalpha|_sch_isdigit,	/* A-Za-z0-9 */
64  _sch_isidnum  = _sch_isidst|_sch_isdigit,	/* A-Za-z0-9_ */
65  _sch_isgraph  = _sch_isalnum|_sch_ispunct,	/* isprint and not space */
66  _sch_iscppsp  = _sch_isvsp|_sch_isnvsp,	/* isspace + \0 */
67  _sch_isbasic  = _sch_isprint|_sch_iscppsp     /* basic charset of ISO C
68						   (plus ` and @)  */
69};
70
71/* Character classification.  */
72extern const unsigned short _sch_istable[256];
73
74#define _sch_test(c, bit) (_sch_istable[(c) & 0xff] & (unsigned short)(bit))
75
76#define ISALPHA(c)  _sch_test(c, _sch_isalpha)
77#define ISALNUM(c)  _sch_test(c, _sch_isalnum)
78#define ISBLANK(c)  _sch_test(c, _sch_isblank)
79#define ISCNTRL(c)  _sch_test(c, _sch_iscntrl)
80#define ISDIGIT(c)  _sch_test(c, _sch_isdigit)
81#define ISGRAPH(c)  _sch_test(c, _sch_isgraph)
82#define ISLOWER(c)  _sch_test(c, _sch_islower)
83#define ISPRINT(c)  _sch_test(c, _sch_isprint)
84#define ISPUNCT(c)  _sch_test(c, _sch_ispunct)
85#define ISSPACE(c)  _sch_test(c, _sch_isspace)
86#define ISUPPER(c)  _sch_test(c, _sch_isupper)
87#define ISXDIGIT(c) _sch_test(c, _sch_isxdigit)
88
89#define ISIDNUM(c)	_sch_test(c, _sch_isidnum)
90#define ISIDST(c)	_sch_test(c, _sch_isidst)
91#define IS_ISOBASIC(c)	_sch_test(c, _sch_isbasic)
92#define IS_VSPACE(c)	_sch_test(c, _sch_isvsp)
93#define IS_NVSPACE(c)	_sch_test(c, _sch_isnvsp)
94#define IS_SPACE_OR_NUL(c)	_sch_test(c, _sch_iscppsp)
95
96/* Character transformation.  */
97extern const unsigned char  _sch_toupper[256];
98extern const unsigned char  _sch_tolower[256];
99#define TOUPPER(c) _sch_toupper[(c) & 0xff]
100#define TOLOWER(c) _sch_tolower[(c) & 0xff]
101
102#endif /* no ctype.h */
103#endif /* SAFE_CTYPE_H */
104