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1.1 root 1: /*
2: Copyright (C) 1996-1997 Id Software, Inc.
3:
4: This program is free software; you can redistribute it and/or
5: modify it under the terms of the GNU General Public License
6: as published by the Free Software Foundation; either version 2
7: of the License, or (at your option) any later version.
8:
9: This program is distributed in the hope that it will be useful,
10: but WITHOUT ANY WARRANTY; without even the implied warranty of
11: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12:
13: See the GNU General Public License for more details.
14:
15: You should have received a copy of the GNU General Public License
16: along with this program; if not, write to the Free Software
17: Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18:
19: */
20: // wad.c
21:
22: #include "quakedef.h"
23:
24: int wad_numlumps;
25: lumpinfo_t *wad_lumps;
26: byte *wad_base;
27:
28: void SwapPic (qpic_t *pic);
29:
30: /*
31: ==================
32: W_CleanupName
33:
34: Lowercases name and pads with spaces and a terminating 0 to the length of
35: lumpinfo_t->name.
36: Used so lumpname lookups can proceed rapidly by comparing 4 chars at a time
37: Space padding is so names can be printed nicely in tables.
38: Can safely be performed in place.
39: ==================
40: */
41: void W_CleanupName (char *in, char *out)
42: {
43: int i;
44: int c;
45:
46: for (i=0 ; i<16 ; i++ )
47: {
48: c = in[i];
49: if (!c)
50: break;
51:
52: if (c >= 'A' && c <= 'Z')
53: c += ('a' - 'A');
54: out[i] = c;
55: }
56:
57: for ( ; i< 16 ; i++ )
58: out[i] = 0;
59: }
60:
61:
62:
63: /*
64: ====================
65: W_LoadWadFile
66: ====================
67: */
68: void W_LoadWadFile (char *filename)
69: {
70: lumpinfo_t *lump_p;
71: wadinfo_t *header;
72: unsigned i;
73: int infotableofs;
74:
75: wad_base = COM_LoadHunkFile (filename);
76: if (!wad_base)
77: Sys_Error ("W_LoadWadFile: couldn't load %s", filename);
78:
79: header = (wadinfo_t *)wad_base;
80:
81: if (header->identification[0] != 'W'
82: || header->identification[1] != 'A'
83: || header->identification[2] != 'D'
84: || header->identification[3] != '2')
85: Sys_Error ("Wad file %s doesn't have WAD2 id\n",filename);
86:
87: wad_numlumps = LittleLong(header->numlumps);
88: infotableofs = LittleLong(header->infotableofs);
89: wad_lumps = (lumpinfo_t *)(wad_base + infotableofs);
90:
91: for (i=0, lump_p = wad_lumps ; i<wad_numlumps ; i++,lump_p++)
92: {
93: lump_p->filepos = LittleLong(lump_p->filepos);
94: lump_p->size = LittleLong(lump_p->size);
95: W_CleanupName (lump_p->name, lump_p->name);
96: if (lump_p->type == TYP_QPIC)
97: SwapPic ( (qpic_t *)(wad_base + lump_p->filepos));
98: }
99: }
100:
101:
102: /*
103: =============
104: W_GetLumpinfo
105: =============
106: */
107: lumpinfo_t *W_GetLumpinfo (char *name)
108: {
109: int i;
110: lumpinfo_t *lump_p;
111: char clean[16];
112:
113: W_CleanupName (name, clean);
114:
115: for (lump_p=wad_lumps, i=0 ; i<wad_numlumps ; i++,lump_p++)
116: {
117: if (!strcmp(clean, lump_p->name))
118: return lump_p;
119: }
120:
121: Sys_Error ("W_GetLumpinfo: %s not found", name);
122: return NULL;
123: }
124:
125: void *W_GetLumpName (char *name)
126: {
127: lumpinfo_t *lump;
128:
129: lump = W_GetLumpinfo (name);
130:
131: return (void *)(wad_base + lump->filepos);
132: }
133:
134: void *W_GetLumpNum (int num)
135: {
136: lumpinfo_t *lump;
137:
138: if (num < 0 || num > wad_numlumps)
139: Sys_Error ("W_GetLumpNum: bad number: %i", num);
140:
141: lump = wad_lumps + num;
142:
143: return (void *)(wad_base + lump->filepos);
144: }
145:
146: /*
147: =============================================================================
148:
149: automatic byte swapping
150:
151: =============================================================================
152: */
153:
154: void SwapPic (qpic_t *pic)
155: {
156: pic->width = LittleLong(pic->width);
157: pic->height = LittleLong(pic->height);
158: }
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