ref: 781eeead92f56bd399624c6f3edc0568935cf9b1
dir: /qw/wad.c/
#include <u.h> #include <libc.h> #include <stdio.h> #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; wad_base = COM_LoadHunkFile (filename); if (!wad_base) Sys_Error ("W_LoadWadFile: couldn't load %s", filename); 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: %d", 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); }