| 1 | /* <ctype.h> replacement macros. |
| 2 | |
| 3 | Copyright (C) 2000-2019 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 accidently 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 | #include <ctype.h> |
| 123 | #undef isalpha |
| 124 | #define isalpha(c) do_not_use_isalpha_with_safe_ctype |
| 125 | #undef isalnum |
| 126 | #define isalnum(c) do_not_use_isalnum_with_safe_ctype |
| 127 | #undef iscntrl |
| 128 | #define iscntrl(c) do_not_use_iscntrl_with_safe_ctype |
| 129 | #undef isdigit |
| 130 | #define isdigit(c) do_not_use_isdigit_with_safe_ctype |
| 131 | #undef isgraph |
| 132 | #define isgraph(c) do_not_use_isgraph_with_safe_ctype |
| 133 | #undef islower |
| 134 | #define islower(c) do_not_use_islower_with_safe_ctype |
| 135 | #undef isprint |
| 136 | #define isprint(c) do_not_use_isprint_with_safe_ctype |
| 137 | #undef ispunct |
| 138 | #define ispunct(c) do_not_use_ispunct_with_safe_ctype |
| 139 | #undef isspace |
| 140 | #define isspace(c) do_not_use_isspace_with_safe_ctype |
| 141 | #undef isupper |
| 142 | #define isupper(c) do_not_use_isupper_with_safe_ctype |
| 143 | #undef isxdigit |
| 144 | #define isxdigit(c) do_not_use_isxdigit_with_safe_ctype |
| 145 | #undef toupper |
| 146 | #define toupper(c) do_not_use_toupper_with_safe_ctype |
| 147 | #undef tolower |
| 148 | #define tolower(c) do_not_use_tolower_with_safe_ctype |
| 149 | |
| 150 | #endif /* SAFE_CTYPE_H */ |