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Diffstat (limited to 'Source/3rdParty/physfs/physfs_archiver_slb.c')
| -rw-r--r-- | Source/3rdParty/physfs/physfs_archiver_slb.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/Source/3rdParty/physfs/physfs_archiver_slb.c b/Source/3rdParty/physfs/physfs_archiver_slb.c new file mode 100644 index 0000000..4fc28d4 --- /dev/null +++ b/Source/3rdParty/physfs/physfs_archiver_slb.c @@ -0,0 +1,135 @@ +/* + * SLB support routines for PhysicsFS. + * + * This driver handles SLB archives ("slab files"). This uncompressed format + * is used in I-War / Independence War and Independence War: Defiance. + * + * The format begins with four zero bytes (version?), the file count and the + * location of the table of contents. Each ToC entry contains a 64-byte buffer + * containing a zero-terminated filename, the offset of the data, and its size. + * All the filenames begin with the separator character '\'. + * + * Please see the file LICENSE.txt in the source's root directory. + * + * This file written by Aleksi Nurmi, based on the GRP archiver by + * Ryan C. Gordon. + */ + +#define __PHYSICSFS_INTERNAL__ +#include "physfs_internal.h" + +#if PHYSFS_SUPPORTS_SLB + +static int slbLoadEntries(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[64]; + char backslash; + char *ptr; + + /* don't include the '\' in the beginning */ + BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, &backslash, 1), 0); + BAIL_IF(backslash != '\\', PHYSFS_ERR_CORRUPT, 0); + + /* read the rest of the buffer, 63 bytes */ + BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, &name, 63), 0); + name[63] = '\0'; /* in case the name lacks the null terminator */ + + /* convert backslashes */ + for (ptr = name; *ptr; ptr++) + { + if (*ptr == '\\') + *ptr = '/'; + } /* for */ + + BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, &pos, 4), 0); + pos = PHYSFS_swapULE32(pos); + + BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, &size, 4), 0); + size = PHYSFS_swapULE32(size); + + BAIL_IF_ERRPASS(!UNPK_addEntry(arc, name, 0, -1, -1, pos, size), 0); + } /* for */ + + return 1; +} /* slbLoadEntries */ + + +static void *SLB_openArchive(PHYSFS_Io *io, const char *name, + int forWriting, int *claimed) +{ + PHYSFS_uint32 version; + PHYSFS_uint32 count; + PHYSFS_uint32 tocPos; + void *unpkarc; + + /* There's no identifier on an SLB file, so we assume it's _not_ if the + file count or tocPos is zero. Beyond that, we'll assume it's + bogus/corrupt if the entries' filenames don't start with '\' or the + tocPos is past the end of the file (seek will fail). This probably + covers all meaningful cases where we would accidentally accept a non-SLB + file with this archiver. */ + + assert(io != NULL); /* shouldn't ever happen. */ + + BAIL_IF(forWriting, PHYSFS_ERR_READ_ONLY, NULL); + + BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, &version, sizeof (version)), NULL); + version = PHYSFS_swapULE32(version); + BAIL_IF(version != 0, PHYSFS_ERR_UNSUPPORTED, NULL); + + BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, &count, sizeof (count)), NULL); + count = PHYSFS_swapULE32(count); + BAIL_IF(!count, PHYSFS_ERR_UNSUPPORTED, NULL); + + /* offset of the table of contents */ + BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, &tocPos, sizeof (tocPos)), NULL); + tocPos = PHYSFS_swapULE32(tocPos); + BAIL_IF(!tocPos, PHYSFS_ERR_UNSUPPORTED, NULL); + + /* seek to the table of contents */ + BAIL_IF_ERRPASS(!io->seek(io, tocPos), NULL); + + unpkarc = UNPK_openArchive(io); + BAIL_IF_ERRPASS(!unpkarc, NULL); + + if (!slbLoadEntries(io, count, unpkarc)) + { + UNPK_abandonArchive(unpkarc); + return NULL; + } /* if */ + + *claimed = 1; /* oh well. */ + + return unpkarc; +} /* SLB_openArchive */ + + +const PHYSFS_Archiver __PHYSFS_Archiver_SLB = +{ + CURRENT_PHYSFS_ARCHIVER_API_VERSION, + { + "SLB", + "I-War / Independence War Slab file", + "Aleksi Nurmi <aleksi.nurmi@gmail.com>", + "https://bitbucket.org/ahnurmi/", + 0, /* supportsSymlinks */ + }, + SLB_openArchive, + UNPK_enumerate, + UNPK_openRead, + UNPK_openWrite, + UNPK_openAppend, + UNPK_remove, + UNPK_mkdir, + UNPK_stat, + UNPK_closeArchive +}; + +#endif /* defined PHYSFS_SUPPORTS_SLB */ + +/* end of physfs_archiver_slb.c ... */ |