/* wvWare
 * Copyright (C) Caolan McNamara, Dom Lachowicz, and others
 *
 * 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.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdlib.h>
#include <stdio.h>
#include "wv.h"

/*
   this function retrieves a generic PLCF; this is useful since it
   means we do not have to add specific functions for retrieving
   various simple PLCFs (for instance the PLCFs that store information
   about footnotes, endnotes and annotations are just simple arrays of
   U32s)

   plcf - a pointer to a pointer where we should allocate the structure
          the caller needs to free these using wvFree() once not needed
          
   offset - an offset in the stream fd where the PLCF starts
   len - a length in bytes (!!!) of the PLCF
   fd - the stream from which to read the PLCF
*/
int
wvGetPLCF (void ** plcf, U32 offset, U32 len, wvStream * fd)
{
    U32 i, i32, i8;
	
    if (len == 0)
	{
		*plcf = NULL;
	}
    else
	{
		*plcf = wvMalloc (len);
		if (*plcf == NULL)
	    {
			wvError (("NO MEM 1, failed to alloc %d bytes\n",len));
			return (1);
	    }
		
		wvStream_goto (fd, offset);
		
		i32 = len / 4;
		i8  = len % 4;
		
		for (i = 0; i < i32; i++)
			((U32*)(*plcf))[i] = read_32ubit (fd);

		for (i = i32*4; i < i32*4 + i8; i++)
			((U8*)(*plcf))[i] = read_8ubit (fd);
	}
    return (0);
}