/
archiver_qpak.c
122 lines (98 loc) · 3.57 KB
/
archiver_qpak.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
/*
* QPAK support routines for PhysicsFS.
*
* This archiver handles the archive format utilized by Quake 1 and 2.
* Quake3-based games use the PkZip/Info-Zip format (which our zip.c
* archiver handles).
*
* ========================================================================
*
* This format info (in more detail) comes from:
* http://debian.fmi.uni-sofia.bg/~sergei/cgsr/docs/pak.txt
*
* Quake PAK Format
*
* Header
* (4 bytes) signature = 'PACK'
* (4 bytes) directory offset
* (4 bytes) directory length
*
* Directory
* (56 bytes) file name
* (4 bytes) file position
* (4 bytes) file length
*
* ========================================================================
*
* Please see the file LICENSE.txt in the source's root directory.
*
* This file written by Ryan C. Gordon.
*/
#define __PHYSICSFS_INTERNAL__
#include "physfs_internal.h"
#if PHYSFS_SUPPORTS_QPAK
#define QPAK_SIG 0x4B434150 /* "PACK" in ASCII. */
static UNPKentry *qpakLoadEntries(PHYSFS_Io *io, PHYSFS_uint32 fileCount)
{
UNPKentry *entries = NULL;
UNPKentry *entry = NULL;
entries = (UNPKentry *) allocator.Malloc(sizeof (UNPKentry) * fileCount);
BAIL_IF_MACRO(entries == NULL, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
for (entry = entries; fileCount > 0; fileCount--, entry++)
{
if (!__PHYSFS_readAll(io, &entry->name, 56)) goto failed;
if (!__PHYSFS_readAll(io, &entry->startPos, 4)) goto failed;
if (!__PHYSFS_readAll(io, &entry->size, 4)) goto failed;
entry->size = PHYSFS_swapULE32(entry->size);
entry->startPos = PHYSFS_swapULE32(entry->startPos);
} /* for */
return entries;
failed:
allocator.Free(entries);
return NULL;
} /* qpakLoadEntries */
static void *QPAK_openArchive(PHYSFS_Io *io, const char *name, int forWriting)
{
UNPKentry *entries = NULL;
PHYSFS_uint32 val = 0;
PHYSFS_uint32 pos = 0;
PHYSFS_uint32 count = 0;
assert(io != NULL); /* shouldn't ever happen. */
BAIL_IF_MACRO(forWriting, PHYSFS_ERR_READ_ONLY, NULL);
BAIL_IF_MACRO(!__PHYSFS_readAll(io, &val, 4), ERRPASS, NULL);
if (PHYSFS_swapULE32(val) != QPAK_SIG)
BAIL_MACRO(PHYSFS_ERR_UNSUPPORTED, NULL);
BAIL_IF_MACRO(!__PHYSFS_readAll(io, &val, 4), ERRPASS, NULL);
pos = PHYSFS_swapULE32(val); /* directory table offset. */
BAIL_IF_MACRO(!__PHYSFS_readAll(io, &val, 4), ERRPASS, NULL);
count = PHYSFS_swapULE32(val);
/* corrupted archive? */
BAIL_IF_MACRO((count % 64) != 0, PHYSFS_ERR_CORRUPT, NULL);
count /= 64;
BAIL_IF_MACRO(!io->seek(io, pos), ERRPASS, NULL);
entries = qpakLoadEntries(io, count);
BAIL_IF_MACRO(!entries, ERRPASS, NULL);
return UNPK_openArchive(io, entries, count);
} /* QPAK_openArchive */
const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_QPAK =
{
"PAK",
"Quake I/II format",
"Ryan C. Gordon <icculus@icculus.org>",
"http://icculus.org/physfs/",
};
const PHYSFS_Archiver __PHYSFS_Archiver_QPAK =
{
&__PHYSFS_ArchiveInfo_QPAK,
QPAK_openArchive, /* openArchive() method */
UNPK_enumerateFiles, /* enumerateFiles() method */
UNPK_openRead, /* openRead() method */
UNPK_openWrite, /* openWrite() method */
UNPK_openAppend, /* openAppend() method */
UNPK_remove, /* remove() method */
UNPK_mkdir, /* mkdir() method */
UNPK_closeArchive, /* closeArchive() method */
UNPK_stat /* stat() method */
};
#endif /* defined PHYSFS_SUPPORTS_QPAK */
/* end of qpak.c ... */