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Diffstat (limited to 'Source/3rdParty/physfs/physfs_archiver_wad.c')
| -rw-r--r-- | Source/3rdParty/physfs/physfs_archiver_wad.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/Source/3rdParty/physfs/physfs_archiver_wad.c b/Source/3rdParty/physfs/physfs_archiver_wad.c new file mode 100644 index 0000000..b094c5b --- /dev/null +++ b/Source/3rdParty/physfs/physfs_archiver_wad.c @@ -0,0 +1,135 @@ +/* + * WAD support routines for PhysicsFS. + * + * This driver handles DOOM engine archives ("wads"). + * This format (but not this driver) was designed by id Software for use + * with the DOOM engine. + * The specs of the format are from the unofficial doom specs v1.666 + * found here: http://www.gamers.org/dhs/helpdocs/dmsp1666.html + * The format of the archive: (from the specs) + * + * A WAD file has three parts: + * (1) a twelve-byte header + * (2) one or more "lumps" + * (3) a directory or "info table" that contains the names, offsets, and + * sizes of all the lumps in the WAD + * + * The header consists of three four-byte parts: + * (a) an ASCII string which must be either "IWAD" or "PWAD" + * (b) a uint32 which is the number of lumps in the wad + * (c) a uint32 which is the file offset to the start of + * the directory + * + * The directory has one 16-byte entry for every lump. Each entry consists + * of three parts: + * + * (a) a uint32, the file offset to the start of the lump + * (b) a uint32, the size of the lump in bytes + * (c) an 8-byte ASCII string, the name of the lump, padded with zeros. + * For example, the "DEMO1" entry in hexadecimal would be + * (44 45 4D 4F 31 00 00 00) + * + * Note that there is no way to tell if an opened WAD archive is a + * IWAD or PWAD with this archiver. + * I couldn't think of a way to provide that information, without being too + * hacky. + * I don't think it's really that important though. + * + * + * Please see the file LICENSE.txt in the source's root directory. + * + * This file written by Travis Wells, based on the GRP archiver by + * Ryan C. Gordon. + */ + +#define __PHYSICSFS_INTERNAL__ +#include "physfs_internal.h" + +#if PHYSFS_SUPPORTS_WAD + +static int wadLoadEntries(PHYSFS_Io *io, const PHYSFS_uint32 count, void *arc) +{ + PHYSFS_uint32 i; + for (i = 0; i < count; i++) + { + PHYSFS_uint32 pos; + PHYSFS_uint32 size; + char name[9]; + + BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, &pos, 4), 0); + BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, &size, 4), 0); + BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, name, 8), 0); + + name[8] = '\0'; /* name might not be null-terminated in file. */ + size = PHYSFS_swapULE32(size); + pos = PHYSFS_swapULE32(pos); + BAIL_IF_ERRPASS(!UNPK_addEntry(arc, name, 0, -1, -1, pos, size), 0); + } /* for */ + + return 1; +} /* wadLoadEntries */ + + +static void *WAD_openArchive(PHYSFS_Io *io, const char *name, + int forWriting, int *claimed) +{ + PHYSFS_uint8 buf[4]; + PHYSFS_uint32 count; + PHYSFS_uint32 directoryOffset; + void *unpkarc; + + assert(io != NULL); /* shouldn't ever happen. */ + + BAIL_IF(forWriting, PHYSFS_ERR_READ_ONLY, NULL); + BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, buf, sizeof (buf)), NULL); + if ((memcmp(buf, "IWAD", 4) != 0) && (memcmp(buf, "PWAD", 4) != 0)) + BAIL(PHYSFS_ERR_UNSUPPORTED, NULL); + + *claimed = 1; + + BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, &count, sizeof (count)), NULL); + count = PHYSFS_swapULE32(count); + + BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, &directoryOffset, 4), 0); + directoryOffset = PHYSFS_swapULE32(directoryOffset); + + BAIL_IF_ERRPASS(!io->seek(io, directoryOffset), 0); + + unpkarc = UNPK_openArchive(io); + BAIL_IF_ERRPASS(!unpkarc, NULL); + + if (!wadLoadEntries(io, count, unpkarc)) + { + UNPK_abandonArchive(unpkarc); + return NULL; + } /* if */ + + return unpkarc; +} /* WAD_openArchive */ + + +const PHYSFS_Archiver __PHYSFS_Archiver_WAD = +{ + CURRENT_PHYSFS_ARCHIVER_API_VERSION, + { + "WAD", + "DOOM engine format", + "Travis Wells <traviswells@mchsi.com>", + "http://www.3dmm2.com/doom/", + 0, /* supportsSymlinks */ + }, + WAD_openArchive, + UNPK_enumerate, + UNPK_openRead, + UNPK_openWrite, + UNPK_openAppend, + UNPK_remove, + UNPK_mkdir, + UNPK_stat, + UNPK_closeArchive +}; + +#endif /* defined PHYSFS_SUPPORTS_WAD */ + +/* end of physfs_archiver_wad.c ... */ + |