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archiver_slb.c
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archiver_slb.c
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/*
* 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 UNPKentry *slbLoadEntries(PHYSFS_Io *io, PHYSFS_uint32 fileCount)
{
UNPKentry *entries = NULL;
UNPKentry *entry = NULL;
entries = (UNPKentry *) allocator.Malloc(sizeof (UNPKentry) * fileCount);
BAIL_IF_MACRO(entries == NULL, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
for (entry = entries; fileCount > 0; fileCount--, entry++)
{
char *ptr;
/* don't include the '\' in the beginning */
char backslash;
GOTO_IF_MACRO(!__PHYSFS_readAll(io, &backslash, 1), ERRPASS, failed);
GOTO_IF_MACRO(backslash != '\\', ERRPASS, failed);
/* read the rest of the buffer, 63 bytes */
GOTO_IF_MACRO(!__PHYSFS_readAll(io, &entry->name, 63), ERRPASS, failed);
entry->name[63] = '\0'; /* in case the name lacks the null terminator */
/* convert backslashes */
for (ptr = entry->name; *ptr; ptr++)
{
if (*ptr == '\\')
*ptr = '/';
} /* for */
GOTO_IF_MACRO(!__PHYSFS_readAll(io, &entry->startPos, 4),
ERRPASS, failed);
entry->startPos = PHYSFS_swapULE32(entry->startPos);
GOTO_IF_MACRO(!__PHYSFS_readAll(io, &entry->size, 4), ERRPASS, failed);
entry->size = PHYSFS_swapULE32(entry->size);
} /* for */
return entries;
failed:
allocator.Free(entries);
return NULL;
} /* slbLoadEntries */
static void *SLB_openArchive(PHYSFS_Io *io, const char *name, int forWriting)
{
PHYSFS_uint32 version;
PHYSFS_uint32 count = 0;
PHYSFS_uint32 tocPos = 0;
UNPKentry *entries = NULL;
assert(io != NULL); /* shouldn't ever happen. */
BAIL_IF_MACRO(forWriting, PHYSFS_ERR_READ_ONLY, NULL);
BAIL_IF_MACRO(!__PHYSFS_readAll(io, &version, sizeof(version)),
ERRPASS, NULL);
version = PHYSFS_swapULE32(version);
BAIL_IF_MACRO(version != 0, ERRPASS, NULL);
BAIL_IF_MACRO(!__PHYSFS_readAll(io, &count, sizeof(count)), ERRPASS, NULL);
count = PHYSFS_swapULE32(count);
/* offset of the table of contents */
BAIL_IF_MACRO(!__PHYSFS_readAll(io, &tocPos, sizeof(tocPos)),
ERRPASS, NULL);
tocPos = PHYSFS_swapULE32(tocPos);
/* seek to the table of contents */
BAIL_IF_MACRO(!io->seek(io, tocPos), ERRPASS, NULL);
entries = slbLoadEntries(io, count);
BAIL_IF_MACRO(!entries, ERRPASS, NULL);
return UNPK_openArchive(io, entries, count);
} /* 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>",
"http://bitbucket.org/ahnurmi/",
0, /* supportsSymlinks */
},
SLB_openArchive, /* openArchive() method */
UNPK_enumerateFiles, /* enumerateFiles() method */
UNPK_openRead, /* openRead() method */
UNPK_openWrite, /* openWrite() method */
UNPK_openAppend, /* openAppend() method */
UNPK_remove, /* remove() method */
UNPK_mkdir, /* mkdir() method */
UNPK_closeArchive, /* closeArchive() method */
UNPK_stat /* stat() method */
};
#endif /* defined PHYSFS_SUPPORTS_SLB */
/* end of archiver_slb.c ... */