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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1 | pmbaty | 1 | /* |
| 2 | * QPAK support routines for PhysicsFS. |
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| 3 | * |
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| 4 | * This archiver handles the archive format utilized by Quake 1 and 2. |
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| 5 | * Quake3-based games use the PkZip/Info-Zip format (which our |
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| 6 | * physfs_archiver_zip.c handles). |
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| 7 | * |
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| 8 | * ======================================================================== |
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| 9 | * |
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| 10 | * This format info (in more detail) comes from: |
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| 11 | * https://web.archive.org/web/20040209101748/http://debian.fmi.uni-sofia.bg/~sergei/cgsr/docs/pak.txt |
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| 12 | * |
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| 13 | * Quake PAK Format |
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| 14 | * |
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| 15 | * Header |
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| 16 | * (4 bytes) signature = 'PACK' |
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| 17 | * (4 bytes) directory offset |
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| 18 | * (4 bytes) directory length |
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| 19 | * |
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| 20 | * Directory |
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| 21 | * (56 bytes) file name |
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| 22 | * (4 bytes) file position |
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| 23 | * (4 bytes) file length |
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| 24 | * |
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| 25 | * ======================================================================== |
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| 26 | * |
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| 27 | * Please see the file LICENSE.txt in the source's root directory. |
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| 28 | * |
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| 29 | * This file written by Ryan C. Gordon. |
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| 30 | */ |
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| 31 | |||
| 32 | #define __PHYSICSFS_INTERNAL__ |
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| 33 | #include "physfs_internal.h" |
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| 34 | |||
| 35 | #if PHYSFS_SUPPORTS_QPAK |
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| 36 | |||
| 37 | #define QPAK_SIG 0x4B434150 /* "PACK" in ASCII. */ |
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| 38 | |||
| 39 | static int qpakLoadEntries(PHYSFS_Io *io, const PHYSFS_uint32 count, void *arc) |
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| 40 | { |
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| 41 | PHYSFS_uint32 i; |
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| 42 | for (i = 0; i < count; i++) |
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| 43 | { |
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| 44 | PHYSFS_uint32 size; |
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| 45 | PHYSFS_uint32 pos; |
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| 46 | char name[56]; |
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| 47 | BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, name, 56), 0); |
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| 48 | BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, &pos, 4), 0); |
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| 49 | BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, &size, 4), 0); |
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| 50 | size = PHYSFS_swapULE32(size); |
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| 51 | pos = PHYSFS_swapULE32(pos); |
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| 52 | BAIL_IF_ERRPASS(!UNPK_addEntry(arc, name, 0, -1, -1, pos, size), 0); |
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| 53 | } /* for */ |
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| 54 | |||
| 55 | return 1; |
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| 56 | } /* qpakLoadEntries */ |
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| 57 | |||
| 58 | |||
| 59 | static void *QPAK_openArchive(PHYSFS_Io *io, const char *name, |
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| 60 | int forWriting, int *claimed) |
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| 61 | { |
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| 62 | PHYSFS_uint32 val = 0; |
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| 63 | PHYSFS_uint32 pos = 0; |
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| 64 | PHYSFS_uint32 count = 0; |
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| 65 | void *unpkarc; |
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| 66 | |||
| 67 | assert(io != NULL); /* shouldn't ever happen. */ |
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| 68 | |||
| 69 | BAIL_IF(forWriting, PHYSFS_ERR_READ_ONLY, NULL); |
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| 70 | |||
| 71 | BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, &val, 4), NULL); |
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| 72 | if (PHYSFS_swapULE32(val) != QPAK_SIG) |
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| 73 | BAIL(PHYSFS_ERR_UNSUPPORTED, NULL); |
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| 74 | |||
| 75 | *claimed = 1; |
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| 76 | |||
| 77 | BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, &val, 4), NULL); |
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| 78 | pos = PHYSFS_swapULE32(val); /* directory table offset. */ |
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| 79 | |||
| 80 | BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, &val, 4), NULL); |
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| 81 | count = PHYSFS_swapULE32(val); |
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| 82 | |||
| 83 | /* corrupted archive? */ |
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| 84 | BAIL_IF((count % 64) != 0, PHYSFS_ERR_CORRUPT, NULL); |
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| 85 | count /= 64; |
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| 86 | |||
| 87 | BAIL_IF_ERRPASS(!io->seek(io, pos), NULL); |
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| 88 | |||
| 89 | unpkarc = UNPK_openArchive(io); |
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| 90 | BAIL_IF_ERRPASS(!unpkarc, NULL); |
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| 91 | |||
| 92 | if (!qpakLoadEntries(io, count, unpkarc)) |
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| 93 | { |
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| 94 | UNPK_abandonArchive(unpkarc); |
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| 95 | return NULL; |
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| 96 | } /* if */ |
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| 97 | |||
| 98 | return unpkarc; |
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| 99 | } /* QPAK_openArchive */ |
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| 100 | |||
| 101 | |||
| 102 | const PHYSFS_Archiver __PHYSFS_Archiver_QPAK = |
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| 103 | { |
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| 104 | CURRENT_PHYSFS_ARCHIVER_API_VERSION, |
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| 105 | { |
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| 106 | "PAK", |
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| 107 | "Quake I/II format", |
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| 108 | "Ryan C. Gordon <icculus@icculus.org>", |
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| 109 | "https://icculus.org/physfs/", |
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| 110 | 0, /* supportsSymlinks */ |
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| 111 | }, |
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| 112 | QPAK_openArchive, |
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| 113 | UNPK_enumerate, |
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| 114 | UNPK_openRead, |
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| 115 | UNPK_openWrite, |
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| 116 | UNPK_openAppend, |
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| 117 | UNPK_remove, |
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| 118 | UNPK_mkdir, |
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| 119 | UNPK_stat, |
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| 120 | UNPK_closeArchive |
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| 121 | }; |
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| 122 | |||
| 123 | #endif /* defined PHYSFS_SUPPORTS_QPAK */ |
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| 124 | |||
| 125 | /* end of physfs_archiver_qpak.c ... */ |
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| 126 |