safe-ctype.h revision 218822
1228753Smm/* <ctype.h> replacement macros. 2228753Smm 3228753Smm Copyright (C) 2000, 2001 Free Software Foundation, Inc. 4228753Smm Contributed by Zack Weinberg <zackw@stanford.edu>. 5228753Smm 6228753SmmThis file is part of the libiberty library. 7228753SmmLibiberty is free software; you can redistribute it and/or 8228753Smmmodify it under the terms of the GNU Library General Public 9228753SmmLicense as published by the Free Software Foundation; either 10228753Smmversion 2 of the License, or (at your option) any later version. 11228753Smm 12228753SmmLibiberty is distributed in the hope that it will be useful, 13228753Smmbut WITHOUT ANY WARRANTY; without even the implied warranty of 14228753SmmMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15228753SmmLibrary General Public License for more details. 16228753Smm 17228753SmmYou should have received a copy of the GNU Library General Public 18228753SmmLicense along with libiberty; see the file COPYING.LIB. If 19228753Smmnot, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, 20228753SmmBoston, MA 02110-1301, USA. */ 21228753Smm 22228753Smm/* This is a compatible replacement of the standard C library's <ctype.h> 23228753Smm with the following properties: 24228753Smm 25228753Smm - Implements all isxxx() macros required by C99. 26228753Smm - Also implements some character classes useful when 27228763Smm parsing C-like languages. 28228753Smm - Does not change behavior depending on the current locale. 29228753Smm - Behaves properly for all values in the range of a signed or 30228753Smm unsigned char. 31228753Smm 32228753Smm To avoid conflicts, this header defines the isxxx functions in upper 33228753Smm case, e.g. ISALPHA not isalpha. */ 34228753Smm 35228753Smm#ifndef SAFE_CTYPE_H 36228753Smm#define SAFE_CTYPE_H 37228753Smm 38228753Smm#ifdef isalpha 39228753Smm #error "safe-ctype.h and ctype.h may not be used simultaneously" 40228753Smm#endif 41228753Smm 42228753Smm/* Determine host character set. */ 43228753Smm#define HOST_CHARSET_UNKNOWN 0 44228753Smm#define HOST_CHARSET_ASCII 1 45228753Smm#define HOST_CHARSET_EBCDIC 2 46228753Smm 47228753Smm#if '\n' == 0x0A && ' ' == 0x20 && '0' == 0x30 \ 48228753Smm && 'A' == 0x41 && 'a' == 0x61 && '!' == 0x21 49228753Smm# define HOST_CHARSET HOST_CHARSET_ASCII 50228753Smm#else 51228753Smm# if '\n' == 0x15 && ' ' == 0x40 && '0' == 0xF0 \ 52228753Smm && 'A' == 0xC1 && 'a' == 0x81 && '!' == 0x5A 53228753Smm# define HOST_CHARSET HOST_CHARSET_EBCDIC 54228753Smm# else 55228753Smm# define HOST_CHARSET HOST_CHARSET_UNKNOWN 56228753Smm# endif 57228753Smm#endif 58228753Smm 59228753Smm/* Categories. */ 60228753Smm 61232153Smmenum { 62232153Smm /* In C99 */ 63228753Smm _sch_isblank = 0x0001, /* space \t */ 64228753Smm _sch_iscntrl = 0x0002, /* nonprinting characters */ 65228753Smm _sch_isdigit = 0x0004, /* 0-9 */ 66228753Smm _sch_islower = 0x0008, /* a-z */ 67228753Smm _sch_isprint = 0x0010, /* any printing character including ' ' */ 68228753Smm _sch_ispunct = 0x0020, /* all punctuation */ 69228753Smm _sch_isspace = 0x0040, /* space \t \n \r \f \v */ 70228753Smm _sch_isupper = 0x0080, /* A-Z */ 71228753Smm _sch_isxdigit = 0x0100, /* 0-9A-Fa-f */ 72228753Smm 73228753Smm /* Extra categories useful to cpplib. */ 74228753Smm _sch_isidst = 0x0200, /* A-Za-z_ */ 75228753Smm _sch_isvsp = 0x0400, /* \n \r */ 76228753Smm _sch_isnvsp = 0x0800, /* space \t \f \v \0 */ 77228753Smm 78228753Smm /* Combinations of the above. */ 79228753Smm _sch_isalpha = _sch_isupper|_sch_islower, /* A-Za-z */ 80228753Smm _sch_isalnum = _sch_isalpha|_sch_isdigit, /* A-Za-z0-9 */ 81228753Smm _sch_isidnum = _sch_isidst|_sch_isdigit, /* A-Za-z0-9_ */ 82228753Smm _sch_isgraph = _sch_isalnum|_sch_ispunct, /* isprint and not space */ 83228753Smm _sch_iscppsp = _sch_isvsp|_sch_isnvsp, /* isspace + \0 */ 84228753Smm _sch_isbasic = _sch_isprint|_sch_iscppsp /* basic charset of ISO C 85228753Smm (plus ` and @) */ 86228753Smm}; 87228753Smm 88228753Smm/* Character classification. */ 89228753Smmextern const unsigned short _sch_istable[256]; 90228753Smm 91228753Smm#define _sch_test(c, bit) (_sch_istable[(c) & 0xff] & (unsigned short)(bit)) 92228753Smm 93228753Smm#define ISALPHA(c) _sch_test(c, _sch_isalpha) 94228753Smm#define ISALNUM(c) _sch_test(c, _sch_isalnum) 95228753Smm#define ISBLANK(c) _sch_test(c, _sch_isblank) 96232153Smm#define ISCNTRL(c) _sch_test(c, _sch_iscntrl) 97232153Smm#define ISDIGIT(c) _sch_test(c, _sch_isdigit) 98228753Smm#define ISGRAPH(c) _sch_test(c, _sch_isgraph) 99228753Smm#define ISLOWER(c) _sch_test(c, _sch_islower) 100228753Smm#define ISPRINT(c) _sch_test(c, _sch_isprint) 101228753Smm#define ISPUNCT(c) _sch_test(c, _sch_ispunct) 102228753Smm#define ISSPACE(c) _sch_test(c, _sch_isspace) 103228753Smm#define ISUPPER(c) _sch_test(c, _sch_isupper) 104228753Smm#define ISXDIGIT(c) _sch_test(c, _sch_isxdigit) 105228753Smm 106228753Smm#define ISIDNUM(c) _sch_test(c, _sch_isidnum) 107228753Smm#define ISIDST(c) _sch_test(c, _sch_isidst) 108228753Smm#define IS_ISOBASIC(c) _sch_test(c, _sch_isbasic) 109228753Smm#define IS_VSPACE(c) _sch_test(c, _sch_isvsp) 110228753Smm#define IS_NVSPACE(c) _sch_test(c, _sch_isnvsp) 111228753Smm#define IS_SPACE_OR_NUL(c) _sch_test(c, _sch_iscppsp) 112228753Smm 113228753Smm/* Character transformation. */ 114228753Smmextern const unsigned char _sch_toupper[256]; 115228753Smmextern const unsigned char _sch_tolower[256]; 116228753Smm#define TOUPPER(c) _sch_toupper[(c) & 0xff] 117228753Smm#define TOLOWER(c) _sch_tolower[(c) & 0xff] 118228753Smm 119228753Smm#endif /* SAFE_CTYPE_H */ 120228753Smm