7768
+ − 1 /*
+ − 2 * QPAK support routines for PhysicsFS.
+ − 3 *
+ − 4 * This archiver handles the archive format utilized by Quake 1 and 2.
+ − 5 * Quake3-based games use the PkZip/Info-Zip format (which our zip.c
+ − 6 * archiver handles).
+ − 7 *
+ − 8 * ========================================================================
+ − 9 *
+ − 10 * This format info (in more detail) comes from:
+ − 11 * http://debian.fmi.uni-sofia.bg/~sergei/cgsr/docs/pak.txt
+ − 12 *
+ − 13 * Quake PAK Format
+ − 14 *
+ − 15 * Header
+ − 16 * (4 bytes) signature = 'PACK'
+ − 17 * (4 bytes) directory offset
+ − 18 * (4 bytes) directory length
+ − 19 *
+ − 20 * Directory
+ − 21 * (56 bytes) file name
+ − 22 * (4 bytes) file position
+ − 23 * (4 bytes) file length
+ − 24 *
+ − 25 * ========================================================================
+ − 26 *
+ − 27 * Please see the file LICENSE.txt in the source's root directory.
+ − 28 *
+ − 29 * This file written by Ryan C. Gordon.
+ − 30 */
+ − 31
+ − 32 #define __PHYSICSFS_INTERNAL__
+ − 33 #include "physfs_internal.h"
+ − 34
+ − 35 #if PHYSFS_SUPPORTS_QPAK
+ − 36
+ − 37 #define QPAK_SIG 0x4B434150 /* "PACK" in ASCII. */
+ − 38
+ − 39 static UNPKentry *qpakLoadEntries(PHYSFS_Io *io, PHYSFS_uint32 fileCount)
+ − 40 {
+ − 41 UNPKentry *entries = NULL;
+ − 42 UNPKentry *entry = NULL;
+ − 43
+ − 44 entries = (UNPKentry *) allocator.Malloc(sizeof (UNPKentry) * fileCount);
+ − 45 BAIL_IF_MACRO(entries == NULL, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
+ − 46
+ − 47 for (entry = entries; fileCount > 0; fileCount--, entry++)
+ − 48 {
+ − 49 if (!__PHYSFS_readAll(io, &entry->name, 56)) goto failed;
+ − 50 if (!__PHYSFS_readAll(io, &entry->startPos, 4)) goto failed;
+ − 51 if (!__PHYSFS_readAll(io, &entry->size, 4)) goto failed;
+ − 52 entry->size = PHYSFS_swapULE32(entry->size);
+ − 53 entry->startPos = PHYSFS_swapULE32(entry->startPos);
+ − 54 } /* for */
+ − 55
+ − 56 return entries;
+ − 57
+ − 58 failed:
+ − 59 allocator.Free(entries);
+ − 60 return NULL;
+ − 61 } /* qpakLoadEntries */
+ − 62
+ − 63
+ − 64 static void *QPAK_openArchive(PHYSFS_Io *io, const char *name, int forWriting)
+ − 65 {
+ − 66 UNPKentry *entries = NULL;
+ − 67 PHYSFS_uint32 val = 0;
+ − 68 PHYSFS_uint32 pos = 0;
+ − 69 PHYSFS_uint32 count = 0;
+ − 70
+ − 71 assert(io != NULL); /* shouldn't ever happen. */
+ − 72
+ − 73 BAIL_IF_MACRO(forWriting, PHYSFS_ERR_READ_ONLY, NULL);
+ − 74
+ − 75 BAIL_IF_MACRO(!__PHYSFS_readAll(io, &val, 4), ERRPASS, NULL);
+ − 76 if (PHYSFS_swapULE32(val) != QPAK_SIG)
+ − 77 BAIL_MACRO(PHYSFS_ERR_UNSUPPORTED, NULL);
+ − 78
+ − 79 BAIL_IF_MACRO(!__PHYSFS_readAll(io, &val, 4), ERRPASS, NULL);
+ − 80 pos = PHYSFS_swapULE32(val); /* directory table offset. */
+ − 81
+ − 82 BAIL_IF_MACRO(!__PHYSFS_readAll(io, &val, 4), ERRPASS, NULL);
+ − 83 count = PHYSFS_swapULE32(val);
+ − 84
+ − 85 /* corrupted archive? */
+ − 86 BAIL_IF_MACRO((count % 64) != 0, PHYSFS_ERR_CORRUPT, NULL);
+ − 87 count /= 64;
+ − 88
+ − 89 BAIL_IF_MACRO(!io->seek(io, pos), ERRPASS, NULL);
+ − 90
+ − 91 entries = qpakLoadEntries(io, count);
+ − 92 BAIL_IF_MACRO(!entries, ERRPASS, NULL);
+ − 93 return UNPK_openArchive(io, entries, count);
+ − 94 } /* QPAK_openArchive */
+ − 95
+ − 96
+ − 97 const PHYSFS_Archiver __PHYSFS_Archiver_QPAK =
+ − 98 {
+ − 99 {
+ − 100 "PAK",
+ − 101 "Quake I/II format",
+ − 102 "Ryan C. Gordon <icculus@icculus.org>",
+ − 103 "http://icculus.org/physfs/",
+ − 104 },
+ − 105 QPAK_openArchive, /* openArchive() method */
+ − 106 UNPK_enumerateFiles, /* enumerateFiles() method */
+ − 107 UNPK_openRead, /* openRead() method */
+ − 108 UNPK_openWrite, /* openWrite() method */
+ − 109 UNPK_openAppend, /* openAppend() method */
+ − 110 UNPK_remove, /* remove() method */
+ − 111 UNPK_mkdir, /* mkdir() method */
+ − 112 UNPK_closeArchive, /* closeArchive() method */
+ − 113 UNPK_stat /* stat() method */
+ − 114 };
+ − 115
+ − 116 #endif /* defined PHYSFS_SUPPORTS_QPAK */
+ − 117
+ − 118 /* end of qpak.c ... */
+ − 119