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., 51 Franklin Street - Fifth Floor,
20Boston, MA 02110-1301, 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#endif
41
42/* Determine host character set.  */
43#define HOST_CHARSET_UNKNOWN 0
44#define HOST_CHARSET_ASCII   1
45#define HOST_CHARSET_EBCDIC  2
46
47#if  '\n' == 0x0A && ' ' == 0x20 && '0' == 0x30 \
48   && 'A' == 0x41 && 'a' == 0x61 && '!' == 0x21
49#  define HOST_CHARSET HOST_CHARSET_ASCII
50#else
51# if '\n' == 0x15 && ' ' == 0x40 && '0' == 0xF0 \
52   && 'A' == 0xC1 && 'a' == 0x81 && '!' == 0x5A
53#  define HOST_CHARSET HOST_CHARSET_EBCDIC
54# else
55#  define HOST_CHARSET HOST_CHARSET_UNKNOWN
56# endif
57#endif
58
59/* Categories.  */
60
61enum {
62  /* In C99 */
63  _sch_isblank  = 0x0001,	/* space \t */
64  _sch_iscntrl  = 0x0002,	/* nonprinting characters */
65  _sch_isdigit  = 0x0004,	/* 0-9 */
66  _sch_islower  = 0x0008,	/* a-z */
67  _sch_isprint  = 0x0010,	/* any printing character including ' ' */
68  _sch_ispunct  = 0x0020,	/* all punctuation */
69  _sch_isspace  = 0x0040,	/* space \t \n \r \f \v */
70  _sch_isupper  = 0x0080,	/* A-Z */
71  _sch_isxdigit = 0x0100,	/* 0-9A-Fa-f */
72
73  /* Extra categories useful to cpplib.  */
74  _sch_isidst	= 0x0200,	/* A-Za-z_ */
75  _sch_isvsp    = 0x0400,	/* \n \r */
76  _sch_isnvsp   = 0x0800,	/* space \t \f \v \0 */
77
78  /* Combinations of the above.  */
79  _sch_isalpha  = _sch_isupper|_sch_islower,	/* A-Za-z */
80  _sch_isalnum  = _sch_isalpha|_sch_isdigit,	/* A-Za-z0-9 */
81  _sch_isidnum  = _sch_isidst|_sch_isdigit,	/* A-Za-z0-9_ */
82  _sch_isgraph  = _sch_isalnum|_sch_ispunct,	/* isprint and not space */
83  _sch_iscppsp  = _sch_isvsp|_sch_isnvsp,	/* isspace + \0 */
84  _sch_isbasic  = _sch_isprint|_sch_iscppsp     /* basic charset of ISO C
85						   (plus ` and @)  */
86};
87
88/* Character classification.  */
89extern const unsigned short _sch_istable[256];
90
91#define _sch_test(c, bit) (_sch_istable[(c) & 0xff] & (unsigned short)(bit))
92
93#define ISALPHA(c)  _sch_test(c, _sch_isalpha)
94#define ISALNUM(c)  _sch_test(c, _sch_isalnum)
95#define ISBLANK(c)  _sch_test(c, _sch_isblank)
96#define ISCNTRL(c)  _sch_test(c, _sch_iscntrl)
97#define ISDIGIT(c)  _sch_test(c, _sch_isdigit)
98#define ISGRAPH(c)  _sch_test(c, _sch_isgraph)
99#define ISLOWER(c)  _sch_test(c, _sch_islower)
100#define ISPRINT(c)  _sch_test(c, _sch_isprint)
101#define ISPUNCT(c)  _sch_test(c, _sch_ispunct)
102#define ISSPACE(c)  _sch_test(c, _sch_isspace)
103#define ISUPPER(c)  _sch_test(c, _sch_isupper)
104#define ISXDIGIT(c) _sch_test(c, _sch_isxdigit)
105
106#define ISIDNUM(c)	_sch_test(c, _sch_isidnum)
107#define ISIDST(c)	_sch_test(c, _sch_isidst)
108#define IS_ISOBASIC(c)	_sch_test(c, _sch_isbasic)
109#define IS_VSPACE(c)	_sch_test(c, _sch_isvsp)
110#define IS_NVSPACE(c)	_sch_test(c, _sch_isnvsp)
111#define IS_SPACE_OR_NUL(c)	_sch_test(c, _sch_iscppsp)
112
113/* Character transformation.  */
114extern const unsigned char  _sch_toupper[256];
115extern const unsigned char  _sch_tolower[256];
116#define TOUPPER(c) _sch_toupper[(c) & 0xff]
117#define TOLOWER(c) _sch_tolower[(c) & 0xff]
118
119#endif /* SAFE_CTYPE_H */
120