/*

    kbs - Simple, easily fooled, POP3 spam filter

    Copyright (C) 2003  Ian Cowburn (ianc@noddybox.demon.co.uk)

    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 2 of the License, 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    -------------------------------------------------------------------------

    Common utilities

*/
static const char id[]="$Id$";

#include <stdlib.h>
#include <regex.h>

#include "global.h"
#include "rexp.h"
#include "config.h"
#include "util.h"

static const char header_id[]=KBS_REXP_H;


/* ---------------------------------------- TYPES
*/
struct RE_Expression
{
    regex_t	re;
    char	*expr;
};

/* ---------------------------------------- INTERFACES
*/

RE_Expression RECompile(const char *regexpr)
{
    RE_Expression re;
    int flags;

    re=Malloc(sizeof *re);

    flags=REG_EXTENDED|REG_NOSUB;

    if (!ConfigInt(CONFIG_CASESENSE))
    	flags|=REG_ICASE;

    if (regcomp(&re->re,regexpr,flags))
    {
    	free(re);
	re=NULL;
    }
    else
    {
    	re->expr=CopyStr(regexpr);
    }

    return re;
}


int RESearch(const RE_Expression re, const char *string)
{
    int ret;

    ret=regexec(&re->re,string,0,NULL,0);

    return !ret;
}


const char *REGetExpression(const RE_Expression re)
{
    return re->expr;
}


void REFree(RE_Expression re)
{
    if (re)
    {
	regfree(&re->re);
	free(re->expr);
	free(re);
    }
}


/* END OF FILE */