| /* <ctype.h> replacement macros. |
| |
| Copyright (C) 2000-2022 Free Software Foundation, Inc. |
| Contributed by Zack Weinberg <zackw@stanford.edu>. |
| |
| This file is part of the libiberty library. |
| Libiberty is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Library General Public |
| License as published by the Free Software Foundation; either |
| version 2 of the License, or (at your option) any later version. |
| |
| Libiberty is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Library General Public License for more details. |
| |
| You should have received a copy of the GNU Library General Public |
| License along with libiberty; see the file COPYING.LIB. If |
| not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
| Boston, MA 02110-1301, USA. */ |
| |
| /* This is a compatible replacement of the standard C library's <ctype.h> |
| with the following properties: |
| |
| - Implements all isxxx() macros required by C99. |
| - Also implements some character classes useful when |
| parsing C-like languages. |
| - Does not change behavior depending on the current locale. |
| - Behaves properly for all values in the range of a signed or |
| unsigned char. |
| |
| To avoid conflicts, this header defines the isxxx functions in upper |
| case, e.g. ISALPHA not isalpha. */ |
| |
| #ifndef SAFE_CTYPE_H |
| #define SAFE_CTYPE_H |
| |
| /* Determine host character set. */ |
| #define HOST_CHARSET_UNKNOWN 0 |
| #define HOST_CHARSET_ASCII 1 |
| #define HOST_CHARSET_EBCDIC 2 |
| |
| #if '\n' == 0x0A && ' ' == 0x20 && '0' == 0x30 \ |
| && 'A' == 0x41 && 'a' == 0x61 && '!' == 0x21 |
| # define HOST_CHARSET HOST_CHARSET_ASCII |
| #else |
| # if '\n' == 0x15 && ' ' == 0x40 && '0' == 0xF0 \ |
| && 'A' == 0xC1 && 'a' == 0x81 && '!' == 0x5A |
| # define HOST_CHARSET HOST_CHARSET_EBCDIC |
| # else |
| # define HOST_CHARSET HOST_CHARSET_UNKNOWN |
| # endif |
| #endif |
| |
| /* Categories. */ |
| |
| enum { |
| /* In C99 */ |
| _sch_isblank = 0x0001, /* space \t */ |
| _sch_iscntrl = 0x0002, /* nonprinting characters */ |
| _sch_isdigit = 0x0004, /* 0-9 */ |
| _sch_islower = 0x0008, /* a-z */ |
| _sch_isprint = 0x0010, /* any printing character including ' ' */ |
| _sch_ispunct = 0x0020, /* all punctuation */ |
| _sch_isspace = 0x0040, /* space \t \n \r \f \v */ |
| _sch_isupper = 0x0080, /* A-Z */ |
| _sch_isxdigit = 0x0100, /* 0-9A-Fa-f */ |
| |
| /* Extra categories useful to cpplib. */ |
| _sch_isidst = 0x0200, /* A-Za-z_ */ |
| _sch_isvsp = 0x0400, /* \n \r */ |
| _sch_isnvsp = 0x0800, /* space \t \f \v \0 */ |
| |
| /* Combinations of the above. */ |
| _sch_isalpha = _sch_isupper|_sch_islower, /* A-Za-z */ |
| _sch_isalnum = _sch_isalpha|_sch_isdigit, /* A-Za-z0-9 */ |
| _sch_isidnum = _sch_isidst|_sch_isdigit, /* A-Za-z0-9_ */ |
| _sch_isgraph = _sch_isalnum|_sch_ispunct, /* isprint and not space */ |
| _sch_iscppsp = _sch_isvsp|_sch_isnvsp, /* isspace + \0 */ |
| _sch_isbasic = _sch_isprint|_sch_iscppsp /* basic charset of ISO C |
| (plus ` and @) */ |
| }; |
| |
| /* Character classification. */ |
| extern const unsigned short _sch_istable[256]; |
| |
| #define _sch_test(c, bit) (_sch_istable[(c) & 0xff] & (unsigned short)(bit)) |
| |
| #define ISALPHA(c) _sch_test(c, _sch_isalpha) |
| #define ISALNUM(c) _sch_test(c, _sch_isalnum) |
| #define ISBLANK(c) _sch_test(c, _sch_isblank) |
| #define ISCNTRL(c) _sch_test(c, _sch_iscntrl) |
| #define ISDIGIT(c) _sch_test(c, _sch_isdigit) |
| #define ISGRAPH(c) _sch_test(c, _sch_isgraph) |
| #define ISLOWER(c) _sch_test(c, _sch_islower) |
| #define ISPRINT(c) _sch_test(c, _sch_isprint) |
| #define ISPUNCT(c) _sch_test(c, _sch_ispunct) |
| #define ISSPACE(c) _sch_test(c, _sch_isspace) |
| #define ISUPPER(c) _sch_test(c, _sch_isupper) |
| #define ISXDIGIT(c) _sch_test(c, _sch_isxdigit) |
| |
| #define ISIDNUM(c) _sch_test(c, _sch_isidnum) |
| #define ISIDST(c) _sch_test(c, _sch_isidst) |
| #define IS_ISOBASIC(c) _sch_test(c, _sch_isbasic) |
| #define IS_VSPACE(c) _sch_test(c, _sch_isvsp) |
| #define IS_NVSPACE(c) _sch_test(c, _sch_isnvsp) |
| #define IS_SPACE_OR_NUL(c) _sch_test(c, _sch_iscppsp) |
| |
| /* Character transformation. */ |
| extern const unsigned char _sch_toupper[256]; |
| extern const unsigned char _sch_tolower[256]; |
| #define TOUPPER(c) _sch_toupper[(c) & 0xff] |
| #define TOLOWER(c) _sch_tolower[(c) & 0xff] |
| |
| /* Prevent the users of safe-ctype.h from accidently using the routines |
| from ctype.h. Initially, the approach was to produce an error when |
| detecting that ctype.h has been included. But this was causing |
| trouble as ctype.h might get indirectly included as a result of |
| including another system header (for instance gnulib's stdint.h). |
| So we include ctype.h here and then immediately redefine its macros. */ |
| |
| #include <ctype.h> |
| #undef isalpha |
| #define isalpha(c) do_not_use_isalpha_with_safe_ctype |
| #undef isalnum |
| #define isalnum(c) do_not_use_isalnum_with_safe_ctype |
| #undef iscntrl |
| #define iscntrl(c) do_not_use_iscntrl_with_safe_ctype |
| #undef isdigit |
| #define isdigit(c) do_not_use_isdigit_with_safe_ctype |
| #undef isgraph |
| #define isgraph(c) do_not_use_isgraph_with_safe_ctype |
| #undef islower |
| #define islower(c) do_not_use_islower_with_safe_ctype |
| #undef isprint |
| #define isprint(c) do_not_use_isprint_with_safe_ctype |
| #undef ispunct |
| #define ispunct(c) do_not_use_ispunct_with_safe_ctype |
| #undef isspace |
| #define isspace(c) do_not_use_isspace_with_safe_ctype |
| #undef isupper |
| #define isupper(c) do_not_use_isupper_with_safe_ctype |
| #undef isxdigit |
| #define isxdigit(c) do_not_use_isxdigit_with_safe_ctype |
| #undef toupper |
| #define toupper(c) do_not_use_toupper_with_safe_ctype |
| #undef tolower |
| #define tolower(c) do_not_use_tolower_with_safe_ctype |
| |
| #endif /* SAFE_CTYPE_H */ |