1 /* <ctype.h> replacement macros. 2 3 Copyright (C) 2000, 2001 Free Software Foundation, Inc. 4 Contributed by Zack Weinberg <zackw@stanford.edu>. 5 6 This file is part of the libiberty library. 7 Libiberty is free software; you can redistribute it and/or 8 modify it under the terms of the GNU Library General Public 9 License as published by the Free Software Foundation; either 10 version 2 of the License, or (at your option) any later version. 11 12 Libiberty is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 Library General Public License for more details. 16 17 You should have received a copy of the GNU Library General Public 18 License along with libiberty; see the file COPYING.LIB. If 19 not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, 20 Boston, 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 #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 61 enum { 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. */ 89 extern 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. */ 114 extern const unsigned char _sch_toupper[256]; 115 extern 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