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/* Auxiliary program to test a DFA code path that cannot be triggered
by grep or gawk.
Copyright 2014-2020 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
02110-1301, USA. */
#include <config.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <regex.h>
#include <dfa.h>
#include <localeinfo.h>
#include "getprogname.h"
_Noreturn void
dfaerror (char const *mesg)
{
printf ("dfaerror: %s\n", mesg);
exit (EXIT_FAILURE);
}
_Noreturn void
dfawarn (char const *mesg)
{
printf ("dfawarn: %s\n", mesg);
exit (EXIT_FAILURE);
}
int
main (int argc, char **argv)
{
struct dfa *dfa;
char *beg, *end, *p;
int allow_nl;
struct localeinfo localeinfo;
if (argc < 3)
exit (EXIT_FAILURE);
setlocale (LC_ALL, "");
init_localeinfo (&localeinfo);
dfa = dfaalloc ();
dfasyntax (dfa, &localeinfo, RE_SYNTAX_GREP | RE_NO_EMPTY_RANGES, 0);
dfacomp (argv[1], strlen (argv[1]), dfa, 0);
beg = argv[2];
end = argv[2] + strlen (argv[2]);
allow_nl = argc > 3 && atoi (argv[3]);
p = dfaexec (dfa, beg, end, allow_nl, NULL, NULL);
if (p != NULL)
printf ("%zd\n", p - beg);
exit (EXIT_SUCCESS);
}
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