122 lines
3.2 KiB
C
122 lines
3.2 KiB
C
/*
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* QPAK support routines for PhysicsFS.
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*
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* This archiver handles the archive format utilized by Quake 1 and 2.
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* Quake3-based games use the PkZip/Info-Zip format (which our zip.c
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* archiver handles).
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*
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* ========================================================================
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*
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* This format info (in more detail) comes from:
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* https://web.archive.org/web/20040209101748/http://debian.fmi.uni-sofia.bg/~sergei/cgsr/docs/pak.txt
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*
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* Quake PAK Format
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*
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* Header
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* (4 bytes) signature = 'PACK'
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* (4 bytes) directory offset
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* (4 bytes) directory length
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*
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* Directory
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* (56 bytes) file name
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* (4 bytes) file position
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* (4 bytes) file length
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*
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* ========================================================================
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*
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* Please see the file LICENSE.txt in the source's root directory.
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*
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* This file written by Ryan C. Gordon.
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*/
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#define __PHYSICSFS_INTERNAL__
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#include "physfs_internal.h"
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#if PHYSFS_SUPPORTS_QPAK
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#define QPAK_SIG 0x4B434150 /* "PACK" in ASCII. */
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static UNPKentry *qpakLoadEntries(PHYSFS_Io *io, PHYSFS_uint32 fileCount)
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{
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UNPKentry *entries = NULL;
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UNPKentry *entry = NULL;
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entries = (UNPKentry *) allocator.Malloc(sizeof (UNPKentry) * fileCount);
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BAIL_IF(entries == NULL, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
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for (entry = entries; fileCount > 0; fileCount--, entry++)
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{
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if (!__PHYSFS_readAll(io, &entry->name, 56)) goto failed;
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if (!__PHYSFS_readAll(io, &entry->startPos, 4)) goto failed;
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if (!__PHYSFS_readAll(io, &entry->size, 4)) goto failed;
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entry->size = PHYSFS_swapULE32(entry->size);
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entry->startPos = PHYSFS_swapULE32(entry->startPos);
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} /* for */
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return entries;
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failed:
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allocator.Free(entries);
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return NULL;
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} /* qpakLoadEntries */
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static void *QPAK_openArchive(PHYSFS_Io *io, const char *name, int forWriting)
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{
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UNPKentry *entries = NULL;
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PHYSFS_uint32 val = 0;
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PHYSFS_uint32 pos = 0;
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PHYSFS_uint32 count = 0;
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assert(io != NULL); /* shouldn't ever happen. */
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BAIL_IF(forWriting, PHYSFS_ERR_READ_ONLY, NULL);
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BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, &val, 4), NULL);
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if (PHYSFS_swapULE32(val) != QPAK_SIG)
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BAIL(PHYSFS_ERR_UNSUPPORTED, NULL);
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BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, &val, 4), NULL);
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pos = PHYSFS_swapULE32(val); /* directory table offset. */
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BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, &val, 4), NULL);
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count = PHYSFS_swapULE32(val);
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/* corrupted archive? */
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BAIL_IF((count % 64) != 0, PHYSFS_ERR_CORRUPT, NULL);
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count /= 64;
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BAIL_IF_ERRPASS(!io->seek(io, pos), NULL);
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entries = qpakLoadEntries(io, count);
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BAIL_IF_ERRPASS(!entries, NULL);
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return UNPK_openArchive(io, entries, count);
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} /* QPAK_openArchive */
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const PHYSFS_Archiver __PHYSFS_Archiver_QPAK =
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{
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CURRENT_PHYSFS_ARCHIVER_API_VERSION,
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{
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"PAK",
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"Quake I/II format",
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"Ryan C. Gordon <icculus@icculus.org>",
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"https://icculus.org/physfs/",
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0, /* supportsSymlinks */
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},
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QPAK_openArchive,
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UNPK_enumerateFiles,
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UNPK_openRead,
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UNPK_openWrite,
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UNPK_openAppend,
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UNPK_remove,
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UNPK_mkdir,
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UNPK_stat,
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UNPK_closeArchive
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};
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#endif /* defined PHYSFS_SUPPORTS_QPAK */
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/* end of archiver_qpak.c ... */
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