/*

* 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 4-byte (long) integer which is the number of lumps in the wad

* (c) a long integer 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 long integer, the file offset to the start of the lump

* (b) a long integer, 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.

*

*

*

* This file written by Travis Wells, based on the GRP archiver by

* Ryan C. Gordon.

*/

#if (defined PHYSFS_SUPPORTS_WAD)

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include "physfs.h"

#define __PHYSICSFS_INTERNAL__

#include "physfs_internal.h"

typedef struct

{

PHYSFS_uint32 startPos;

PHYSFS_uint32 size;

} WADentry;

typedef struct

{

PHYSFS_uint32 entryCount;

WADentry *entries;

} WADinfo;

typedef struct

{

WADentry *entry;

PHYSFS_uint32 curPos;

} WADfileinfo;

static inline int readAll(PHYSFS_Io *io, void *buf, const PHYSFS_uint64 len)

{

return (io->read(io, buf, len) == len);

} /* readAll */

allocator.Free(info->entries);

allocator.Free(info);

} /* WAD_dirClose */

const WADentry *entry = finfo->entry;

const PHYSFS_uint64 bytesLeft = (PHYSFS_uint64)(entry->size-finfo->curPos);

PHYSFS_sint64 rc;

if (bytesLeft < len)

len = bytesLeft;

} /* WAD_read */

{

BAIL_MACRO(ERR_NOT_SUPPORTED, -1);

} /* WAD_write */

} /* WAD_tell */

WADfileinfo *finfo = (WADfileinfo *) io->opaque;

const WADentry *entry = finfo->entry;

int rc;

BAIL_IF_MACRO(offset >= entry->size, ERR_PAST_EOF, 0);

if (rc)

finfo->curPos = (PHYSFS_uint32) offset;

} /* WAD_seek */

WADfileinfo *origfinfo = (WADfileinfo *) _io->opaque;

PHYSFS_Io *io = NULL;

PHYSFS_Io *retval = (PHYSFS_Io *) allocator.Malloc(sizeof (PHYSFS_Io));

WADfileinfo *finfo = (WADfileinfo *) allocator.Malloc(sizeof (WADfileinfo));

GOTO_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, WAD_duplicate_failed);

GOTO_IF_MACRO(finfo == NULL, ERR_OUT_OF_MEMORY, WAD_duplicate_failed);

io = origfinfo->io->duplicate(origfinfo->io);

GOTO_IF_MACRO(io == NULL, NULL, WAD_duplicate_failed);

finfo->io = io;

finfo->entry = origfinfo->entry;

finfo->curPos = 0;

memcpy(retval, _io, sizeof (PHYSFS_Io));

retval->opaque = finfo;

return retval;

WAD_duplicate_failed:

if (finfo != NULL) allocator.Free(finfo);

if (retval != NULL) allocator.Free(retval);

if (io != NULL) io->destroy(io);

return NULL;

} /* WAD_duplicate */

WADfileinfo *finfo = (WADfileinfo *) io->opaque;

finfo->io->destroy(finfo->io);

allocator.Free(finfo);

allocator.Free(io);

} /* WAD_destroy */

WAD_read,

WAD_write,

WAD_seek,

WAD_tell,

WAD_length,

WAD_duplicate,

WAD_flush,

WAD_destroy,

NULL

};

if (one != two)

{

const WADentry *a = (const WADentry *) _a;

} /* if */

return 0;

if (one != two)

{

WADentry tmp;

WADentry *first = &(((WADentry *) _a)[one]);

WADentry *second = &(((WADentry *) _a)[two]);

memcpy(&tmp, first, sizeof (WADentry));

memcpy(first, second, sizeof (WADentry));

memcpy(second, &tmp, sizeof (WADentry));

} /* if */

PHYSFS_uint32 directoryOffset;

WADentry *entry;

BAIL_IF_MACRO(!readAll(io, &directoryOffset, 4), NULL, 0);

directoryOffset = PHYSFS_swapULE32(directoryOffset);

BAIL_IF_MACRO(info->entries == NULL, ERR_OUT_OF_MEMORY, 0);

BAIL_IF_MACRO(!io->seek(io, directoryOffset), NULL, 0);

for (entry = info->entries; fileCount > 0; fileCount--, entry++)

{

BAIL_IF_MACRO(!readAll(io, &entry->startPos, 4), NULL, 0);

BAIL_IF_MACRO(!readAll(io, &entry->size, 4), NULL, 0);

BAIL_IF_MACRO(!readAll(io, &entry->name, 8), NULL, 0);

entry->name[8] = '\0'; /* name might not be null-terminated in file. */

entry->size = PHYSFS_swapULE32(entry->size);

entry->startPos = PHYSFS_swapULE32(entry->startPos);

} /* for */

} /* wad_load_entries */

PHYSFS_uint8 buf[4];

WADinfo *info = NULL;

PHYSFS_uint32 val = 0;

assert(io != NULL); /* shouldn't ever happen. */

BAIL_IF_MACRO(forWriting, ERR_ARC_IS_READ_ONLY, 0);

BAIL_IF_MACRO(!readAll(io, buf, sizeof (buf)), NULL, NULL);

if ((memcmp(buf, "IWAD", 4) != 0) && (memcmp(buf, "PWAD", 4) != 0))

GOTO_MACRO(ERR_NOT_AN_ARCHIVE, WAD_openArchive_failed);

info = (WADinfo *) allocator.Malloc(sizeof (WADinfo));

GOTO_IF_MACRO(info == NULL, ERR_OUT_OF_MEMORY, WAD_openArchive_failed);

GOTO_IF_MACRO(!readAll(io,&val,sizeof(val)), NULL, WAD_openArchive_failed);

info->entryCount = PHYSFS_swapULE32(val);

WAD_openArchive_failed:

allocator.Free(info->entries);

allocator.Free(info);

} /* if */

} /* WAD_openArchive */

int omitSymLinks, PHYSFS_EnumFilesCallback cb,

const char *origdir, void *callbackdata)

/* no directories in WAD files. */

if (*dname == '\0')

WADinfo *info = (WADinfo *) opaque;

WADentry *entry = info->entries;

PHYSFS_uint32 max = info->entryCount;

PHYSFS_uint32 i;

} /* WAD_enumerateFiles */

WADentry *a = info->entries;

PHYSFS_sint32 lo = 0;

PHYSFS_sint32 hi = (PHYSFS_sint32) (info->entryCount - 1);

PHYSFS_sint32 middle;

int rc;

/*

* Rule out filenames to avoid unneeded processing...no dirs,

* big filenames, or extensions.

*/

BAIL_IF_MACRO(ptr != NULL, ERR_NO_SUCH_FILE, NULL);

BAIL_IF_MACRO(strlen(name) > 8, ERR_NO_SUCH_FILE, NULL);

BAIL_IF_MACRO(strchr(name, '/') != NULL, ERR_NO_SUCH_FILE, NULL);

while (lo <= hi)

{

middle = lo + ((hi - lo) / 2);

else if (rc > 0)

lo = middle + 1;

else

hi = middle - 1;

} /* while */

BAIL_MACRO(ERR_NO_SUCH_FILE, NULL);

} /* wad_find_entry */

PHYSFS_Io *retval = NULL;

WADinfo *info = (WADinfo *) opaque;

WADfileinfo *finfo;

WADentry *entry;

entry = wad_find_entry(info, fnm);

*fileExists = (entry != NULL);

GOTO_IF_MACRO(entry == NULL, NULL, WAD_openRead_failed);

retval = (PHYSFS_Io *) allocator.Malloc(sizeof (PHYSFS_Io));

GOTO_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, WAD_openRead_failed);

finfo->io = info->io->duplicate(info->io);

GOTO_IF_MACRO(finfo->io == NULL, NULL, WAD_openRead_failed);

if (!finfo->io->seek(finfo->io, entry->startPos))

GOTO_MACRO(NULL, WAD_openRead_failed);

finfo->curPos = 0;

finfo->entry = entry;

memcpy(retval, &WAD_Io, sizeof (*retval));

retval->opaque = finfo;

return retval;

WAD_openRead_failed:

if (finfo != NULL)

if (finfo->io != NULL)

finfo->io->destroy(finfo->io);

} /* if */

if (retval != NULL)

allocator.Free(retval);

return NULL;

} /* WAD_openRead */

{

BAIL_MACRO(ERR_NOT_SUPPORTED, NULL);

} /* WAD_openWrite */

{

BAIL_MACRO(ERR_NOT_SUPPORTED, NULL);

} /* WAD_openAppend */

{

BAIL_MACRO(ERR_NOT_SUPPORTED, 0);

} /* WAD_remove */

{

BAIL_MACRO(ERR_NOT_SUPPORTED, 0);

} /* WAD_mkdir */

PHYSFS_Stat *stat)

{

const WADinfo *info = (const WADinfo *) opaque;

const WADentry *entry = wad_find_entry(info, filename);

*exists = (entry != 0);

if (!entry)

return 0;

stat->filesize = entry->size;

stat->filetype = PHYSFS_FILETYPE_REGULAR;

stat->modtime = -1;

stat->createtime = -1;

stat->accesstime = -1;

stat->readonly = 1;

} /* WAD_stat */

const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_WAD =

{

"WAD",

"Travis Wells <traviswells@mchsi.com>",

"http://www.3dmm2.com/doom/",

};

const PHYSFS_Archiver __PHYSFS_Archiver_WAD =

{

&__PHYSFS_ArchiveInfo_WAD,

WAD_openArchive, /* openArchive() method */

WAD_enumerateFiles, /* enumerateFiles() method */

WAD_openRead, /* openRead() method */

WAD_openWrite, /* openWrite() method */

WAD_openAppend, /* openAppend() method */

WAD_remove, /* remove() method */

WAD_mkdir, /* mkdir() method */

WAD_dirClose, /* dirClose() method */

};

#endif /* defined PHYSFS_SUPPORTS_WAD */

/* end of wad.c ... */