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Diffstat (limited to 'sysroot/usr/include/regexp.h')
-rw-r--r-- | sysroot/usr/include/regexp.h | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/sysroot/usr/include/regexp.h b/sysroot/usr/include/regexp.h new file mode 100644 index 0000000..b7b50b7 --- /dev/null +++ b/sysroot/usr/include/regexp.h @@ -0,0 +1,222 @@ +/* Copyright (C) 1996, 1997, 1998, 1999, 2004 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#ifndef _REGEXP_H +#define _REGEXP_H 1 + +/* The contents of this header file was first standardized in X/Open + System Interface and Headers Issue 2, originally coming from SysV. + In issue 4, version 2, it is marked as TO BE WITDRAWN, and it has + been withdrawn in SUSv3. + + This code shouldn't be used in any newly written code. It is + included only for compatibility reasons. Use the POSIX definition + in <regex.h> for portable applications and a reasonable interface. */ + +#include <features.h> +#include <alloca.h> +#include <regex.h> +#include <stdlib.h> +#include <string.h> + +/* The implementation provided here emulates the needed functionality + by mapping to the POSIX regular expression matcher. The interface + for the here included function is weird (this really is a harmless + word). + + The user has to provide six macros before this header file can be + included: + + INIT Declarations vor variables which can be used by the + other macros. + + GETC() Return the value of the next character in the regular + expression pattern. Successive calls should return + successive characters. + + PEEKC() Return the value of the next character in the regular + expression pattern. Immediately successive calls to + PEEKC() should return the same character which should + also be the next character returned by GETC(). + + UNGETC(c) Cause `c' to be returned by the next call to GETC() and + PEEKC(). + + RETURN(ptr) Used for normal exit of the `compile' function. `ptr' + is a pointer to the character after the last character of + the compiled regular expression. + + ERROR(val) Used for abnormal return from `compile'. `val' is the + error number. The error codes are: + 11 Range endpoint too large. + 16 Bad number. + 25 \digit out of range. + 36 Illegal or missing delimiter. + 41 No remembered search string. + 42 \( \) imbalance. + 43 Too many \(. + 44 More tan two numbers given in \{ \}. + 45 } expected after \. + 46 First number exceeds second in \{ \}. + 49 [ ] imbalance. + 50 Regular expression overflow. + + */ + +__BEGIN_DECLS + +/* Interface variables. They contain the results of the successful + calls to `setp' and `advance'. */ +extern char *loc1; +extern char *loc2; + +/* The use of this variable in the `advance' function is not + supported. */ +extern char *locs; + + +#ifndef __DO_NOT_DEFINE_COMPILE +/* Get and compile the user supplied pattern up to end of line or + string or until EOF is seen, whatever happens first. The result is + placed in the buffer starting at EXPBUF and delimited by ENDBUF. + + This function cannot be defined in the libc itself since it depends + on the macros. */ +char * +compile (char *__restrict instring, char *__restrict expbuf, + __const char *__restrict endbuf, int eof) +{ + char *__input_buffer = NULL; + size_t __input_size = 0; + size_t __current_size = 0; + int __ch; + int __error; + INIT + + /* Align the expression buffer according to the needs for an object + of type `regex_t'. Then check for minimum size of the buffer for + the compiled regular expression. */ + regex_t *__expr_ptr; +# if defined __GNUC__ && __GNUC__ >= 2 + const size_t __req = __alignof__ (regex_t *); +# else + /* How shall we find out? We simply guess it and can change it is + this really proofs to be wrong. */ + const size_t __req = 8; +# endif + expbuf += __req; + expbuf -= (expbuf - ((char *) 0)) % __req; + if (endbuf < expbuf + sizeof (regex_t)) + { + ERROR (50); + } + __expr_ptr = (regex_t *) expbuf; + /* The remaining space in the buffer can be used for the compiled + pattern. */ + __expr_ptr->buffer = expbuf + sizeof (regex_t); + __expr_ptr->allocated = endbuf - (char *) __expr_ptr->buffer; + + while ((__ch = (GETC ())) != eof) + { + if (__ch == '\0' || __ch == '\n') + { + UNGETC (__ch); + break; + } + + if (__current_size + 1 >= __input_size) + { + size_t __new_size = __input_size ? 2 * __input_size : 128; + char *__new_room = (char *) alloca (__new_size); + /* See whether we can use the old buffer. */ + if (__new_room + __new_size == __input_buffer) + { + __input_size += __new_size; + __input_buffer = (char *) memcpy (__new_room, __input_buffer, + __current_size); + } + else if (__input_buffer + __input_size == __new_room) + __input_size += __new_size; + else + { + __input_size = __new_size; + __input_buffer = (char *) memcpy (__new_room, __input_buffer, + __current_size); + } + } + __input_buffer[__current_size++] = __ch; + } + __input_buffer[__current_size++] = '\0'; + + /* Now compile the pattern. */ + __error = regcomp (__expr_ptr, __input_buffer, REG_NEWLINE); + if (__error != 0) + /* Oh well, we have to translate POSIX error codes. */ + switch (__error) + { + case REG_BADPAT: + case REG_ECOLLATE: + case REG_ECTYPE: + case REG_EESCAPE: + case REG_BADRPT: + case REG_EEND: + case REG_ERPAREN: + default: + /* There is no matching error code. */ + RETURN (36); + case REG_ESUBREG: + RETURN (25); + case REG_EBRACK: + RETURN (49); + case REG_EPAREN: + RETURN (42); + case REG_EBRACE: + RETURN (44); + case REG_BADBR: + RETURN (46); + case REG_ERANGE: + RETURN (11); + case REG_ESPACE: + case REG_ESIZE: + ERROR (50); + } + + /* Everything is ok. */ + RETURN ((char *) (__expr_ptr->buffer + __expr_ptr->used)); +} +#endif + + +/* Find the next match in STRING. The compiled regular expression is + found in the buffer starting at EXPBUF. `loc1' will return the + first character matched and `loc2' points to the next unmatched + character. */ +extern int step (__const char *__restrict __string, + __const char *__restrict __expbuf) __THROW; + +/* Match the beginning of STRING with the compiled regular expression + in EXPBUF. If the match is successful `loc2' will contain the + position of the first unmatched character. */ +extern int advance (__const char *__restrict __string, + __const char *__restrict __expbuf) __THROW; + + +__END_DECLS + +#endif /* regexp.h */ |