posix/regex.c

   1 /* Extended regular expression matching and search library.
   2    Copyright (C) 2002, 2003 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, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #ifdef HAVE_CONFIG_H
  22 #include "config.h"
  23 #endif
  24
  25 #ifdef _AIX
  26 #pragma alloca
  27 #else
  28 # ifndef allocax           /* predefined by HP cc +Olibcalls */
  29 #  ifdef __GNUC__
  30 #   define alloca(size) __builtin_alloca (size)
  31 #  else
  32 #   if HAVE_ALLOCA_H
  33 #    include <alloca.h>
  34 #   else
  35 #    ifdef __hpux
  36         void *alloca ();
  37 #    else
  38 #     if !defined __OS2__ && !defined WIN32
  39         char *alloca ();
  40 #     else
  41 #      include <malloc.h>       /* OS/2 defines alloca in here */
  42 #     endif
  43 #    endif
  44 #   endif
  45 #  endif
  46 # endif
  47 #endif
  48
  49 #ifdef _LIBC
  50 /* We have to keep the namespace clean.  */
  51 # define regfree(preg) __regfree (preg)
  52 # define regexec(pr, st, nm, pm, ef) __regexec (pr, st, nm, pm, ef)
  53 # define regcomp(preg, pattern, cflags) __regcomp (preg, pattern, cflags)
  54 # define regerror(errcode, preg, errbuf, errbuf_size) \
  55         __regerror(errcode, preg, errbuf, errbuf_size)
  56 # define re_set_registers(bu, re, nu, st, en) \
  57         __re_set_registers (bu, re, nu, st, en)
  58 # define re_match_2(bufp, string1, size1, string2, size2, pos, regs, stop) \
  59         __re_match_2 (bufp, string1, size1, string2, size2, pos, regs, stop)
  60 # define re_match(bufp, string, size, pos, regs) \
  61         __re_match (bufp, string, size, pos, regs)
  62 # define re_search(bufp, string, size, startpos, range, regs) \
  63         __re_search (bufp, string, size, startpos, range, regs)
  64 # define re_compile_pattern(pattern, length, bufp) \
  65         __re_compile_pattern (pattern, length, bufp)
  66 # define re_set_syntax(syntax) __re_set_syntax (syntax)
  67 # define re_search_2(bufp, st1, s1, st2, s2, startpos, range, regs, stop) \
  68         __re_search_2 (bufp, st1, s1, st2, s2, startpos, range, regs, stop)
  69 # define re_compile_fastmap(bufp) __re_compile_fastmap (bufp)
  70
  71 # include "../locale/localeinfo.h"
  72 #endif
  73
  74 /* POSIX says that <sys/types.h> must be included (by the caller) before
  75    <regex.h>.  */
  76 #include <sys/types.h>
  77
  78 /* On some systems, limits.h sets RE_DUP_MAX to a lower value than
  79    GNU regex allows.  Include it before <regex.h>, which correctly
  80    #undefs RE_DUP_MAX and sets it to the right value.  */
  81 #include <limits.h>
  82
  83 #include <regex.h>
  84 #include "regex_internal.h"
  85
  86 #include "regex_internal.c"
  87 #include "regcomp.c"
  88 #include "regexec.c"
  89
  90 /* Binary backward compatibility.  */
  91 #if _LIBC
  92 # include <shlib-compat.h>
  93 # if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_3)
  94 link_warning (re_max_failures, "the 're_max_failures' variable is obsolete and will go away.")
  95 int re_max_failures = 2000;
  96 # endif
  97 #endif