140 lines
2.8 KiB
C
140 lines
2.8 KiB
C
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// wad.c
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#include "quakedef.h"
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int wad_numlumps;
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lumpinfo_t *wad_lumps;
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byte *wad_base;
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void SwapPic (qpic_t *pic);
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/*
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==================
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W_CleanupName
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Lowercases name and pads with spaces and a terminating 0 to the length of
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lumpinfo_t->name.
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Used so lumpname lookups can proceed rapidly by comparing 4 chars at a time
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Space padding is so names can be printed nicely in tables.
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Can safely be performed in place.
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==================
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*/
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void W_CleanupName (char *in, char *out)
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{
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int i;
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int c;
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for (i=0 ; i<16 ; i++ )
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{
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c = in[i];
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if (!c)
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break;
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if (c >= 'A' && c <= 'Z')
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c += ('a' - 'A');
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out[i] = c;
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}
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for ( ; i< 16 ; i++ )
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out[i] = 0;
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}
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/*
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====================
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W_LoadWadFile
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====================
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*/
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void W_LoadWadFile (char *filename)
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{
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lumpinfo_t *lump_p;
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wadinfo_t *header;
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unsigned i;
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int infotableofs;
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wad_base = COM_LoadHunkFile (filename);
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if (!wad_base)
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Sys_Error ("W_LoadWadFile: couldn't load %s", filename);
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header = (wadinfo_t *)wad_base;
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if (header->identification[0] != 'W'
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|| header->identification[1] != 'A'
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|| header->identification[2] != 'D'
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|| header->identification[3] != '2')
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Sys_Error ("Wad file %s doesn't have WAD2 id\n",filename);
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wad_numlumps = LittleLong(header->numlumps);
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infotableofs = LittleLong(header->infotableofs);
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wad_lumps = (lumpinfo_t *)(wad_base + infotableofs);
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for (i=0, lump_p = wad_lumps ; i<wad_numlumps ; i++,lump_p++)
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{
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lump_p->filepos = LittleLong(lump_p->filepos);
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lump_p->size = LittleLong(lump_p->size);
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W_CleanupName (lump_p->name, lump_p->name);
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if (lump_p->type == TYP_QPIC)
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SwapPic ( (qpic_t *)(wad_base + lump_p->filepos));
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}
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}
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/*
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=============
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W_GetLumpinfo
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=============
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*/
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lumpinfo_t *W_GetLumpinfo (char *name)
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{
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int i;
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lumpinfo_t *lump_p;
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char clean[16];
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W_CleanupName (name, clean);
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for (lump_p=wad_lumps, i=0 ; i<wad_numlumps ; i++,lump_p++)
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{
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if (!strcmp(clean, lump_p->name))
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return lump_p;
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}
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Sys_Error ("W_GetLumpinfo: %s not found", name);
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return NULL;
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}
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void *W_GetLumpName (char *name)
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{
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lumpinfo_t *lump;
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lump = W_GetLumpinfo (name);
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return (void *)(wad_base + lump->filepos);
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}
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void *W_GetLumpNum (int num)
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{
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lumpinfo_t *lump;
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if (num < 0 || num > wad_numlumps)
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Sys_Error ("W_GetLumpNum: bad number: %i", num);
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lump = wad_lumps + num;
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return (void *)(wad_base + lump->filepos);
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}
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/*
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=============================================================================
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automatic byte swapping
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=============================================================================
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*/
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void SwapPic (qpic_t *pic)
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{
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pic->width = LittleLong(pic->width);
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pic->height = LittleLong(pic->height);
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}
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