137 lines
4.1 KiB
C
137 lines
4.1 KiB
C
/*
|
|
* 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);
|
|
|
|
/* !!! FIXME: check case_sensitive and only_usascii params for this archive. */
|
|
unpkarc = UNPK_openArchive(io, 1, 0);
|
|
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 ... */
|