posix/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