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| -rw-r--r-- | include/safe-ctype.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/include/safe-ctype.h b/include/safe-ctype.h new file mode 100644 index 0000000..977653c --- /dev/null +++ b/include/safe-ctype.h @@ -0,0 +1,105 @@ +/* <ctype.h> replacement macros. + + Copyright (C) 2000 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., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, 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 + +#ifdef isalpha + #error "safe-ctype.h and ctype.h may not be used simultaneously" +#else + +/* 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 */ +}; + +/* This code fundamentally assumes that a byte is 8 bits. Test this + at compile time. */ + +extern int a_byte_isnt_eight_bits[(unsigned char)256 == 0 ? 1 : -1]; + +/* Character classification. */ +extern const unsigned short _sch_istable[256]; + +#define _sch_test(c, bit) (_sch_istable[(int)(unsigned char)(c)] & (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_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[(int)(unsigned char)(c)] +#define TOLOWER(c) _sch_tolower[(int)(unsigned char)(c)] + +#endif /* no ctype.h */ +#endif /* SAFE_CTYPE_H */ |