root/lib/regex.c

     1 /* Extended regular expression matching and search library.
     2    Copyright (C) 2002-2023 Free Software Foundation, Inc.
     3    This file is part of the GNU C Library.
     4    Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
     5 
     6    The GNU C Library is free software; you can redistribute it and/or
     7    modify it under the terms of the GNU Lesser General Public
     8    License as published by the Free Software Foundation; either
     9    version 2.1 of the License, or (at your option) any later version.
    10 
    11    The GNU C Library is distributed in the hope that it will be useful,
    12    but WITHOUT ANY WARRANTY; without even the implied warranty of
    13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    14    Lesser General Public License for more details.
    15 
    16    You should have received a copy of the GNU Lesser General Public
    17    License along with the GNU C Library; if not, see
    18    <https://www.gnu.org/licenses/>.  */
    19 
    20 #define __STDC_WANT_IEC_60559_BFP_EXT__
    21 
    22 #ifndef _LIBC
    23 # include <libc-config.h>
    24 
    25 # if __GNUC_PREREQ (4, 6)
    26 #  pragma GCC diagnostic ignored "-Wsuggest-attribute=pure"
    27 #  pragma GCC diagnostic ignored "-Wvla"
    28 # endif
    29 # if __GNUC_PREREQ (4, 3)
    30 #  pragma GCC diagnostic ignored "-Wold-style-definition"
    31 #  pragma GCC diagnostic ignored "-Wtype-limits"
    32 # endif
    33 #endif
    34 
    35 /* Make sure no one compiles this code with a C++ compiler.  */
    36 #if defined __cplusplus && defined _LIBC
    37 # error "This is C code, use a C compiler"
    38 #endif
    39 
    40 #ifdef _LIBC
    41 /* We have to keep the namespace clean.  */
    42 # define regfree(preg) __regfree (preg)
    43 # define regexec(pr, st, nm, pm, ef) __regexec (pr, st, nm, pm, ef)
    44 # define regcomp(preg, pattern, cflags) __regcomp (preg, pattern, cflags)
    45 # define regerror(errcode, preg, errbuf, errbuf_size) \
    46         __regerror(errcode, preg, errbuf, errbuf_size)
    47 # define re_set_registers(bu, re, nu, st, en) \
    48         __re_set_registers (bu, re, nu, st, en)
    49 # define re_match_2(bufp, string1, size1, string2, size2, pos, regs, stop) \
    50         __re_match_2 (bufp, string1, size1, string2, size2, pos, regs, stop)
    51 # define re_match(bufp, string, size, pos, regs) \
    52         __re_match (bufp, string, size, pos, regs)
    53 # define re_search(bufp, string, size, startpos, range, regs) \
    54         __re_search (bufp, string, size, startpos, range, regs)
    55 # define re_compile_pattern(pattern, length, bufp) \
    56         __re_compile_pattern (pattern, length, bufp)
    57 # define re_set_syntax(syntax) __re_set_syntax (syntax)
    58 # define re_search_2(bufp, st1, s1, st2, s2, startpos, range, regs, stop) \
    59         __re_search_2 (bufp, st1, s1, st2, s2, startpos, range, regs, stop)
    60 # define re_compile_fastmap(bufp) __re_compile_fastmap (bufp)
    61 
    62 # include "../locale/localeinfo.h"
    63 #endif
    64 
    65 /* On some systems, limits.h sets RE_DUP_MAX to a lower value than
    66    GNU regex allows.  Include it before <regex.h>, which correctly
    67    #undefs RE_DUP_MAX and sets it to the right value.  */
    68 #include <limits.h>
    69 
    70 #include <regex.h>
    71 #include "regex_internal.h"
    72 
    73 #include "regex_internal.c"
    74 #include "regcomp.c"
    75 #include "regexec.c"
    76 
    77 /* Binary backward compatibility.  */
    78 #if _LIBC
    79 # include <shlib-compat.h>
    80 # if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_3)
    81 link_warning (re_max_failures, "the 're_max_failures' variable is obsolete and will go away.")
    82 int re_max_failures = 2000;
    83 # endif
    84 #endif