1 /* <ctype.h> replacement macros. 2 3 Copyright (C) 2000-2017 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., 51 Franklin Street - Fifth Floor, 20 Boston, 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 /* Determine host character set. */ 39 #define HOST_CHARSET_UNKNOWN 0 40 #define HOST_CHARSET_ASCII 1 41 #define HOST_CHARSET_EBCDIC 2 42 43 #if '\n' == 0x0A && ' ' == 0x20 && '0' == 0x30 \ 44 && 'A' == 0x41 && 'a' == 0x61 && '!' == 0x21 45 # define HOST_CHARSET HOST_CHARSET_ASCII 46 #else 47 # if '\n' == 0x15 && ' ' == 0x40 && '0' == 0xF0 \ 48 && 'A' == 0xC1 && 'a' == 0x81 && '!' == 0x5A 49 # define HOST_CHARSET HOST_CHARSET_EBCDIC 50 # else 51 # define HOST_CHARSET HOST_CHARSET_UNKNOWN 52 # endif 53 #endif 54 55 /* Categories. */ 56 57 enum { 58 /* In C99 */ 59 _sch_isblank = 0x0001, /* space \t */ 60 _sch_iscntrl = 0x0002, /* nonprinting characters */ 61 _sch_isdigit = 0x0004, /* 0-9 */ 62 _sch_islower = 0x0008, /* a-z */ 63 _sch_isprint = 0x0010, /* any printing character including ' ' */ 64 _sch_ispunct = 0x0020, /* all punctuation */ 65 _sch_isspace = 0x0040, /* space \t \n \r \f \v */ 66 _sch_isupper = 0x0080, /* A-Z */ 67 _sch_isxdigit = 0x0100, /* 0-9A-Fa-f */ 68 69 /* Extra categories useful to cpplib. */ 70 _sch_isidst = 0x0200, /* A-Za-z_ */ 71 _sch_isvsp = 0x0400, /* \n \r */ 72 _sch_isnvsp = 0x0800, /* space \t \f \v \0 */ 73 74 /* Combinations of the above. */ 75 _sch_isalpha = _sch_isupper|_sch_islower, /* A-Za-z */ 76 _sch_isalnum = _sch_isalpha|_sch_isdigit, /* A-Za-z0-9 */ 77 _sch_isidnum = _sch_isidst|_sch_isdigit, /* A-Za-z0-9_ */ 78 _sch_isgraph = _sch_isalnum|_sch_ispunct, /* isprint and not space */ 79 _sch_iscppsp = _sch_isvsp|_sch_isnvsp, /* isspace + \0 */ 80 _sch_isbasic = _sch_isprint|_sch_iscppsp /* basic charset of ISO C 81 (plus ` and @) */ 82 }; 83 84 /* Character classification. */ 85 extern const unsigned short _sch_istable[256]; 86 87 #define _sch_test(c, bit) (_sch_istable[(c) & 0xff] & (unsigned short)(bit)) 88 89 #define ISALPHA(c) _sch_test(c, _sch_isalpha) 90 #define ISALNUM(c) _sch_test(c, _sch_isalnum) 91 #define ISBLANK(c) _sch_test(c, _sch_isblank) 92 #define ISCNTRL(c) _sch_test(c, _sch_iscntrl) 93 #define ISDIGIT(c) _sch_test(c, _sch_isdigit) 94 #define ISGRAPH(c) _sch_test(c, _sch_isgraph) 95 #define ISLOWER(c) _sch_test(c, _sch_islower) 96 #define ISPRINT(c) _sch_test(c, _sch_isprint) 97 #define ISPUNCT(c) _sch_test(c, _sch_ispunct) 98 #define ISSPACE(c) _sch_test(c, _sch_isspace) 99 #define ISUPPER(c) _sch_test(c, _sch_isupper) 100 #define ISXDIGIT(c) _sch_test(c, _sch_isxdigit) 101 102 #define ISIDNUM(c) _sch_test(c, _sch_isidnum) 103 #define ISIDST(c) _sch_test(c, _sch_isidst) 104 #define IS_ISOBASIC(c) _sch_test(c, _sch_isbasic) 105 #define IS_VSPACE(c) _sch_test(c, _sch_isvsp) 106 #define IS_NVSPACE(c) _sch_test(c, _sch_isnvsp) 107 #define IS_SPACE_OR_NUL(c) _sch_test(c, _sch_iscppsp) 108 109 /* Character transformation. */ 110 extern const unsigned char _sch_toupper[256]; 111 extern const unsigned char _sch_tolower[256]; 112 #define TOUPPER(c) _sch_toupper[(c) & 0xff] 113 #define TOLOWER(c) _sch_tolower[(c) & 0xff] 114 115 /* Prevent the users of safe-ctype.h from accidentally using the routines 116 from ctype.h. Initially, the approach was to produce an error when 117 detecting that ctype.h has been included. But this was causing 118 trouble as ctype.h might get indirectly included as a result of 119 including another system header (for instance gnulib's stdint.h). 120 So we include ctype.h here and then immediately redefine its macros. */ 121 122 #if 0 /* in valgrind */ 123 #include <ctype.h> 124 #endif /* ! in valgrind */ 125 126 #undef isalpha 127 #define isalpha(c) do_not_use_isalpha_with_safe_ctype 128 #undef isalnum 129 #define isalnum(c) do_not_use_isalnum_with_safe_ctype 130 #undef iscntrl 131 #define iscntrl(c) do_not_use_iscntrl_with_safe_ctype 132 #undef isdigit 133 #define isdigit(c) do_not_use_isdigit_with_safe_ctype 134 #undef isgraph 135 #define isgraph(c) do_not_use_isgraph_with_safe_ctype 136 #undef islower 137 #define islower(c) do_not_use_islower_with_safe_ctype 138 #undef isprint 139 #define isprint(c) do_not_use_isprint_with_safe_ctype 140 #undef ispunct 141 #define ispunct(c) do_not_use_ispunct_with_safe_ctype 142 #undef isspace 143 #define isspace(c) do_not_use_isspace_with_safe_ctype 144 #undef isupper 145 #define isupper(c) do_not_use_isupper_with_safe_ctype 146 #undef isxdigit 147 #define isxdigit(c) do_not_use_isxdigit_with_safe_ctype 148 #undef toupper 149 #define toupper(c) do_not_use_toupper_with_safe_ctype 150 #undef tolower 151 #define tolower(c) do_not_use_tolower_with_safe_ctype 152 153 #endif /* SAFE_CTYPE_H */ 154