/*

    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

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

    Dynamic strings

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

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <stdarg.h>
#include <ctype.h>

#include <sys/types.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <netdb.h>

#include "global.h"
#include "dstring.h"
#include "util.h"

static const char header_id[]=KBS_DSTRING_H;

/* ---------------------------------------- CONSTANTS
*/
#define BLOCKSIZE	512


/* ---------------------------------------- INTERFACES
*/
DString DSInit(void)
{
    DString ds;

    ds=Malloc(sizeof *ds);

    ds->len=0;
    ds->text=Malloc(BLOCKSIZE);
    ds->text[0]=0;

    return ds;
}


void DSFree(DString ds)
{
    if (ds)
    {
	free(ds->text);
	free(ds);
    }
}


DString DSReset(DString ds)
{
    DSFree(ds);
    return DSInit();
}


DString DSAddChar(DString to, char c)
{
    if (((to->len+2)%BLOCKSIZE)==0)
    {
    	to->text=Realloc(to->text,(((to->len+2)/BLOCKSIZE)+1)*BLOCKSIZE);
    }

    to->text[to->len++]=c;
    to->text[to->len]=0;

    return to;
}


DString DSAddCP(DString to, const char *from)
{
    to->len+=strlen(from);
    to->text=Realloc(to->text,(((to->len+1)/BLOCKSIZE)+1)*BLOCKSIZE);

    strcat(to->text,from);

    return to;
}


DString DSAddDS(DString to, const DString from)
{
    DSAddCP(to,from->text);

    return to;
}


/* END OF FILE */