safe-ctype.h revision 1.1.1.1
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}; 68 69/* Character classification. */ 70extern const unsigned short _sch_istable[256]; 71 72#define _sch_test(c, bit) (_sch_istable[(c) & 0xff] & (bit)) 73 74#define ISALPHA(c) _sch_test(c, _sch_isalpha) 75#define ISALNUM(c) _sch_test(c, _sch_isalnum) 76#define ISBLANK(c) _sch_test(c, _sch_isblank) 77#define ISCNTRL(c) _sch_test(c, _sch_iscntrl) 78#define ISDIGIT(c) _sch_test(c, _sch_isdigit) 79#define ISGRAPH(c) _sch_test(c, _sch_isgraph) 80#define ISLOWER(c) _sch_test(c, _sch_islower) 81#define ISPRINT(c) _sch_test(c, _sch_isprint) 82#define ISPUNCT(c) _sch_test(c, _sch_ispunct) 83#define ISSPACE(c) _sch_test(c, _sch_isspace) 84#define ISUPPER(c) _sch_test(c, _sch_isupper) 85#define ISXDIGIT(c) _sch_test(c, _sch_isxdigit) 86 87#define ISIDNUM(c) _sch_test(c, _sch_isidnum) 88#define ISIDST(c) _sch_test(c, _sch_isidst) 89#define IS_VSPACE(c) _sch_test(c, _sch_isvsp) 90#define IS_NVSPACE(c) _sch_test(c, _sch_isnvsp) 91#define IS_SPACE_OR_NUL(c) _sch_test(c, _sch_iscppsp) 92 93/* Character transformation. */ 94extern const unsigned char _sch_toupper[256]; 95extern const unsigned char _sch_tolower[256]; 96#define TOUPPER(c) _sch_toupper[(c) & 0xff] 97#define TOLOWER(c) _sch_tolower[(c) & 0xff] 98 99#endif /* no ctype.h */ 100#endif /* SAFE_CTYPE_H */ 101