/*
Copyright (C) 1996-1997 Id Software, 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 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.

*/
// wad.c

#include "quakedef.h"

int			wad_numlumps;
lumpinfo_t	*wad_lumps;
byte		*wad_base;

void SwapPic(qpic_t *pic);

/*
==================
W_CleanupName

Lowercases name and pads with spaces and a terminating 0 to the length of
lumpinfo_t->name.
Used so lumpname lookups can proceed rapidly by comparing 4 chars at a time
Space padding is so names can be printed nicely in tables.
Can safely be performed in place.
==================
*/
void W_CleanupName(char *in, char *out)
{
    int		i;
    int		c;

    for (i=0 ; i<16 ; i++) {
        c = in[i];
        if (!c) {
            break;
        }

        if (c >= 'A' && c <= 'Z') {
            c += ('a' - 'A');
        }
        out[i] = c;
    }

    for (; i< 16 ; i++) {
        out[i] = 0;
    }
}



/*
====================
W_LoadWadFile
====================
*/
void W_LoadWadFile(char *filename)
{
    lumpinfo_t		*lump_p;
    wadinfo_t		*header;
    unsigned		i;
    int				infotableofs;
    loadedfile_t	*fileinfo;	// 2001-09-12 Returning information about loaded file by Maddes

// 2001-09-12 Returning information about loaded file by Maddes  start
    /*
    	wad_base = COM_LoadHunkFile (filename);
    	if (!wad_base)
    */
    fileinfo = COM_LoadHunkFile(filename);
    if (!fileinfo)
// 2001-09-12 Returning information about loaded file by Maddes  end
    {
        Sys_Error("W_LoadWadFile: couldn't load %s", filename);
    }
    wad_base = fileinfo->data;	// 2001-09-12 Returning information about loaded file by Maddes

    header = (wadinfo_t *)wad_base;

    if (header->identification[0] != 'W'
            || header->identification[1] != 'A'
            || header->identification[2] != 'D'
            || header->identification[3] != '2') {
        Sys_Error("Wad file %s doesn't have WAD2 id\n",filename);
    }

    wad_numlumps = LittleLong(header->numlumps);
    infotableofs = LittleLong(header->infotableofs);
    wad_lumps = (lumpinfo_t *)(wad_base + infotableofs);

    for (i=0, lump_p = wad_lumps ; i<wad_numlumps ; i++,lump_p++) {
        lump_p->filepos = LittleLong(lump_p->filepos);
        lump_p->size = LittleLong(lump_p->size);
        W_CleanupName(lump_p->name, lump_p->name);
        if (lump_p->type == TYP_QPIC) {
            SwapPic((qpic_t *)(wad_base + lump_p->filepos));
        }
    }
}


/*
=============
W_GetLumpinfo
=============
*/
lumpinfo_t	*W_GetLumpinfo(char *name)
{
    int		i;
    lumpinfo_t	*lump_p;
    char	clean[16];

    W_CleanupName(name, clean);

    for (lump_p=wad_lumps, i=0 ; i<wad_numlumps ; i++,lump_p++) {
        if (!strcmp(clean, lump_p->name)) {
            return lump_p;
        }
    }

    Sys_Error("W_GetLumpinfo: %s not found", name);
    return NULL;
}

void *W_GetLumpName(char *name)
{
    lumpinfo_t	*lump;

    lump = W_GetLumpinfo(name);

    return (void *)(wad_base + lump->filepos);
}

void *W_GetLumpNum(int num)
{
    lumpinfo_t	*lump;

    if (num < 0 || num > wad_numlumps) {
        Sys_Error("W_GetLumpNum: bad number: %i", num);
    }

    lump = wad_lumps + num;

    return (void *)(wad_base + lump->filepos);
}

/*
=============================================================================

automatic byte swapping

=============================================================================
*/

void SwapPic(qpic_t *pic)
{
    pic->width = LittleLong(pic->width);
    pic->height = LittleLong(pic->height);
}
