misc/physfs/src/archiver_lzma.c
branchicegun
changeset 8604 fa44e3218a08
parent 8589 3bb505fc707e
parent 8603 1b58da1fd9bf
child 8606 45f6c35ffd33
--- a/misc/physfs/src/archiver_lzma.c	Tue Feb 26 20:37:58 2013 -0500
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,701 +0,0 @@
-/*
- * LZMA support routines for PhysicsFS.
- *
- * Please see the file lzma.txt in the lzma/ directory.
- *
- *  This file was written by Dennis Schridde, with some peeking at "7zMain.c"
- *   by Igor Pavlov.
- */
-
-#define __PHYSICSFS_INTERNAL__
-#include "physfs_internal.h"
-
-#if PHYSFS_SUPPORTS_7Z
-
-#include "lzma/C/7zCrc.h"
-#include "lzma/C/Archive/7z/7zIn.h"
-#include "lzma/C/Archive/7z/7zExtract.h"
-
-
-/* 7z internal from 7zIn.c */
-extern int TestSignatureCandidate(Byte *testBytes);
-
-
-#ifdef _LZMA_IN_CB
-# define BUFFER_SIZE (1 << 12)
-#endif /* _LZMA_IN_CB */
-
-
-/*
- * Carries filestream metadata through 7z
- */
-typedef struct _FileInputStream
-{
-    ISzAlloc allocImp; /* Allocation implementation, used by 7z */
-    ISzAlloc allocTempImp; /* Temporary allocation implementation, used by 7z */
-    ISzInStream inStream; /* Input stream with read callbacks, used by 7z */
-    PHYSFS_Io *io;  /* Filehandle, used by read implementation */
-#ifdef _LZMA_IN_CB
-    Byte buffer[BUFFER_SIZE]; /* Buffer, used by read implementation */
-#endif /* _LZMA_IN_CB */
-} FileInputStream;
-
-/*
- * In the 7z format archives are splited into blocks, those are called folders
- * Set by LZMA_read()
-*/
-typedef struct _LZMAfolder
-{
-    PHYSFS_uint32 index; /* Index of folder in archive */
-    PHYSFS_uint32 references; /* Number of files using this block */
-    PHYSFS_uint8 *cache; /* Cached folder */
-    size_t size; /* Size of folder */
-} LZMAfolder;
-
-/*
- * Set by LZMA_openArchive(), except folder which gets it's values
- *  in LZMA_read()
- */
-typedef struct _LZMAarchive
-{
-    struct _LZMAfile *files; /* Array of files, size == archive->db.Database.NumFiles */
-    LZMAfolder *folders; /* Array of folders, size == archive->db.Database.NumFolders */
-    CArchiveDatabaseEx db; /* For 7z: Database */
-    FileInputStream stream; /* For 7z: Input file incl. read and seek callbacks */
-} LZMAarchive;
-
-/* Set by LZMA_openArchive(), except offset which is set by LZMA_read() */
-typedef struct _LZMAfile
-{
-    PHYSFS_uint32 index; /* Index of file in archive */
-    LZMAarchive *archive; /* Link to corresponding archive */
-    LZMAfolder *folder; /* Link to corresponding folder */
-    CFileItem *item; /* For 7z: File info, eg. name, size */
-    size_t offset; /* Offset in folder */
-    size_t position; /* Current "virtual" position in file */
-} LZMAfile;
-
-
-/* Memory management implementations to be passed to 7z */
-
-static void *SzAllocPhysicsFS(size_t size)
-{
-    return ((size == 0) ? NULL : allocator.Malloc(size));
-} /* SzAllocPhysicsFS */
-
-
-static void SzFreePhysicsFS(void *address)
-{
-    if (address != NULL)
-        allocator.Free(address);
-} /* SzFreePhysicsFS */
-
-
-/* Filesystem implementations to be passed to 7z */
-
-#ifdef _LZMA_IN_CB
-
-/*
- * Read implementation, to be passed to 7z
- * WARNING: If the ISzInStream in 'object' is not contained in a valid FileInputStream this _will_ break horribly!
- */
-SZ_RESULT SzFileReadImp(void *object, void **buffer, size_t maxReqSize,
-                        size_t *processedSize)
-{
-    FileInputStream *s = (FileInputStream *)(object - offsetof(FileInputStream, inStream)); /* HACK! */
-    PHYSFS_sint64 processedSizeLoc = 0;
-
-    if (maxReqSize > BUFFER_SIZE)
-        maxReqSize = BUFFER_SIZE;
-    processedSizeLoc = s->io->read(s->io, s->buffer, maxReqSize);
-    *buffer = s->buffer;
-    if (processedSize != NULL)
-        *processedSize = (size_t) processedSizeLoc;
-
-    return SZ_OK;
-} /* SzFileReadImp */
-
-#else
-
-/*
- * Read implementation, to be passed to 7z
- * WARNING: If the ISzInStream in 'object' is not contained in a valid FileInputStream this _will_ break horribly!
- */
-SZ_RESULT SzFileReadImp(void *object, void *buffer, size_t size,
-                        size_t *processedSize)
-{
-    FileInputStream *s = (FileInputStream *)((unsigned long)object - offsetof(FileInputStream, inStream)); /* HACK! */
-    const size_t processedSizeLoc = s->io->read(s->io, buffer, size);
-    if (processedSize != NULL)
-        *processedSize = processedSizeLoc;
-    return SZ_OK;
-} /* SzFileReadImp */
-
-#endif
-
-/*
- * Seek implementation, to be passed to 7z
- * WARNING: If the ISzInStream in 'object' is not contained in a valid FileInputStream this _will_ break horribly!
- */
-SZ_RESULT SzFileSeekImp(void *object, CFileSize pos)
-{
-    FileInputStream *s = (FileInputStream *)((unsigned long)object - offsetof(FileInputStream, inStream)); /* HACK! */
-    if (s->io->seek(s->io, (PHYSFS_uint64) pos))
-        return SZ_OK;
-    return SZE_FAIL;
-} /* SzFileSeekImp */
-
-
-/*
- * Translate Microsoft FILETIME (used by 7zip) into UNIX timestamp
- */
-static PHYSFS_sint64 lzma_filetime_to_unix_timestamp(CArchiveFileTime *ft)
-{
-    /* MS counts in nanoseconds ... */
-    const PHYSFS_uint64 FILETIME_NANOTICKS_PER_SECOND = __PHYSFS_UI64(10000000);
-    /* MS likes to count seconds since 01.01.1601 ... */
-    const PHYSFS_uint64 FILETIME_UNIX_DIFF = __PHYSFS_UI64(11644473600);
-
-    PHYSFS_uint64 filetime = ft->Low | ((PHYSFS_uint64)ft->High << 32);
-    return filetime/FILETIME_NANOTICKS_PER_SECOND - FILETIME_UNIX_DIFF;
-} /* lzma_filetime_to_unix_timestamp */
-
-
-/*
- * Compare a file with a given name, C89 stdlib variant
- * Used for sorting
- */
-static int lzma_file_cmp_stdlib(const void *key, const void *object)
-{
-    const char *name = (const char *) key;
-    LZMAfile *file = (LZMAfile *) object;
-    return strcmp(name, file->item->Name);
-} /* lzma_file_cmp_posix */
-
-
-/*
- * Compare two files with each other based on the name
- * Used for sorting
- */
-static int lzma_file_cmp(void *_a, size_t one, size_t two)
-{
-    LZMAfile *files = (LZMAfile *) _a;
-    return strcmp(files[one].item->Name, files[two].item->Name);
-} /* lzma_file_cmp */
-
-
-/*
- * Swap two entries in the file array
- */
-static void lzma_file_swap(void *_a, size_t one, size_t two)
-{
-    LZMAfile tmp;
-    LZMAfile *first = &(((LZMAfile *) _a)[one]);
-    LZMAfile *second = &(((LZMAfile *) _a)[two]);
-    memcpy(&tmp, first, sizeof (LZMAfile));
-    memcpy(first, second, sizeof (LZMAfile));
-    memcpy(second, &tmp, sizeof (LZMAfile));
-} /* lzma_file_swap */
-
-
-/*
- * Find entry 'name' in 'archive'
- */
-static LZMAfile * lzma_find_file(const LZMAarchive *archive, const char *name)
-{
-    LZMAfile *file = bsearch(name, archive->files, archive->db.Database.NumFiles, sizeof(*archive->files), lzma_file_cmp_stdlib); /* FIXME: Should become __PHYSFS_search!!! */
-
-    BAIL_IF_MACRO(file == NULL, PHYSFS_ERR_NO_SUCH_PATH, NULL);
-
-    return file;
-} /* lzma_find_file */
-
-
-/*
- * Load metadata for the file at given index
- */
-static int lzma_file_init(LZMAarchive *archive, PHYSFS_uint32 fileIndex)
-{
-    LZMAfile *file = &archive->files[fileIndex];
-    PHYSFS_uint32 folderIndex = archive->db.FileIndexToFolderIndexMap[fileIndex];
-
-    file->index = fileIndex; /* Store index into 7z array, since we sort our own. */
-    file->archive = archive;
-    file->folder = (folderIndex != (PHYSFS_uint32)-1 ? &archive->folders[folderIndex] : NULL); /* Directories don't have a folder (they contain no own data...) */
-    file->item = &archive->db.Database.Files[fileIndex]; /* Holds crucial data and is often referenced -> Store link */
-    file->position = 0;
-    file->offset = 0; /* Offset will be set by LZMA_read() */
-
-    return 1;
-} /* lzma_load_file */
-
-
-/*
- * Load metadata for all files
- */
-static int lzma_files_init(LZMAarchive *archive)
-{
-    PHYSFS_uint32 fileIndex = 0, numFiles = archive->db.Database.NumFiles;
-
-    for (fileIndex = 0; fileIndex < numFiles; fileIndex++ )
-    {
-        if (!lzma_file_init(archive, fileIndex))
-        {
-            return 0; /* FALSE on failure */
-        }
-    } /* for */
-
-   __PHYSFS_sort(archive->files, (size_t) numFiles, lzma_file_cmp, lzma_file_swap);
-
-    return 1;
-} /* lzma_load_files */
-
-
-/*
- * Initialise specified archive
- */
-static void lzma_archive_init(LZMAarchive *archive)
-{
-    memset(archive, 0, sizeof(*archive));
-
-    /* Prepare callbacks for 7z */
-    archive->stream.inStream.Read = SzFileReadImp;
-    archive->stream.inStream.Seek = SzFileSeekImp;
-
-    archive->stream.allocImp.Alloc = SzAllocPhysicsFS;
-    archive->stream.allocImp.Free = SzFreePhysicsFS;
-
-    archive->stream.allocTempImp.Alloc = SzAllocPhysicsFS;
-    archive->stream.allocTempImp.Free = SzFreePhysicsFS;
-}
-
-
-/*
- * Deinitialise archive
- */
-static void lzma_archive_exit(LZMAarchive *archive)
-{
-    /* Free arrays */
-    allocator.Free(archive->folders);
-    allocator.Free(archive->files);
-    allocator.Free(archive);
-}
-
-/*
- * Wrap all 7z calls in this, so the physfs error state is set appropriately.
- */
-static int lzma_err(SZ_RESULT rc)
-{
-    switch (rc)
-    {
-        case SZ_OK: /* Same as LZMA_RESULT_OK */
-            break;
-        case SZE_DATA_ERROR: /* Same as LZMA_RESULT_DATA_ERROR */
-            __PHYSFS_setError(PHYSFS_ERR_CORRUPT); /*!!!FIXME: was "PHYSFS_ERR_DATA_ERROR" */
-            break;
-        case SZE_OUTOFMEMORY:
-            __PHYSFS_setError(PHYSFS_ERR_OUT_OF_MEMORY);
-            break;
-        case SZE_CRC_ERROR:
-            __PHYSFS_setError(PHYSFS_ERR_CORRUPT);
-            break;
-        case SZE_NOTIMPL:
-            __PHYSFS_setError(PHYSFS_ERR_UNSUPPORTED);
-            break;
-        case SZE_FAIL:
-            __PHYSFS_setError(PHYSFS_ERR_OTHER_ERROR);  /* !!! FIXME: right? */
-            break;
-        case SZE_ARCHIVE_ERROR:
-            __PHYSFS_setError(PHYSFS_ERR_CORRUPT);  /* !!! FIXME: right? */
-            break;
-        default:
-            __PHYSFS_setError(PHYSFS_ERR_OTHER_ERROR);
-    } /* switch */
-
-    return rc;
-} /* lzma_err */
-
-
-static PHYSFS_sint64 LZMA_read(PHYSFS_Io *io, void *outBuf, PHYSFS_uint64 len)
-{
-    LZMAfile *file = (LZMAfile *) io->opaque;
-
-    size_t wantedSize = (size_t) len;
-    const size_t remainingSize = file->item->Size - file->position;
-    size_t fileSize = 0;
-
-    BAIL_IF_MACRO(wantedSize == 0, ERRPASS, 0); /* quick rejection. */
-    BAIL_IF_MACRO(remainingSize == 0, PHYSFS_ERR_PAST_EOF, 0);
-
-    if (wantedSize > remainingSize)
-        wantedSize = remainingSize;
-
-    /* Only decompress the folder if it is not already cached */
-    if (file->folder->cache == NULL)
-    {
-        const int rc = lzma_err(SzExtract(
-            &file->archive->stream.inStream, /* compressed data */
-            &file->archive->db, /* 7z's database, containing everything */
-            file->index, /* Index into database arrays */
-            /* Index of cached folder, will be changed by SzExtract */
-            &file->folder->index,
-            /* Cache for decompressed folder, allocated/freed by SzExtract */
-            &file->folder->cache,
-            /* Size of cache, will be changed by SzExtract */
-            &file->folder->size,
-            /* Offset of this file inside the cache, set by SzExtract */
-            &file->offset,
-            &fileSize, /* Size of this file */
-            &file->archive->stream.allocImp,
-            &file->archive->stream.allocTempImp));
-
-        if (rc != SZ_OK)
-            return -1;
-    } /* if */
-
-    /* Copy wanted bytes over from cache to outBuf */
-    memcpy(outBuf, (file->folder->cache + file->offset + file->position),
-            wantedSize);
-    file->position += wantedSize; /* Increase virtual position */
-
-    return wantedSize;
-} /* LZMA_read */
-
-
-static PHYSFS_sint64 LZMA_write(PHYSFS_Io *io, const void *b, PHYSFS_uint64 len)
-{
-    BAIL_MACRO(PHYSFS_ERR_READ_ONLY, -1);
-} /* LZMA_write */
-
-
-static PHYSFS_sint64 LZMA_tell(PHYSFS_Io *io)
-{
-    LZMAfile *file = (LZMAfile *) io->opaque;
-    return file->position;
-} /* LZMA_tell */
-
-
-static int LZMA_seek(PHYSFS_Io *io, PHYSFS_uint64 offset)
-{
-    LZMAfile *file = (LZMAfile *) io->opaque;
-
-    BAIL_IF_MACRO(offset > file->item->Size, PHYSFS_ERR_PAST_EOF, 0);
-
-    file->position = offset; /* We only use a virtual position... */
-
-    return 1;
-} /* LZMA_seek */
-
-
-static PHYSFS_sint64 LZMA_length(PHYSFS_Io *io)
-{
-    const LZMAfile *file = (LZMAfile *) io->opaque;
-    return (file->item->Size);
-} /* LZMA_length */
-
-
-static PHYSFS_Io *LZMA_duplicate(PHYSFS_Io *_io)
-{
-    /* !!! FIXME: this archiver needs to be reworked to allow multiple
-     * !!! FIXME:  opens before we worry about duplication. */
-    BAIL_MACRO(PHYSFS_ERR_UNSUPPORTED, NULL);
-} /* LZMA_duplicate */
-
-
-static int LZMA_flush(PHYSFS_Io *io) { return 1;  /* no write support. */ }
-
-
-static void LZMA_destroy(PHYSFS_Io *io)
-{
-    LZMAfile *file = (LZMAfile *) io->opaque;
-
-    if (file->folder != NULL)
-    {
-        /* Only decrease refcount if someone actually requested this file... Prevents from overflows and close-on-open... */
-        if (file->folder->references > 0)
-            file->folder->references--;
-        if (file->folder->references == 0)
-        {
-            /* Free the cache which might have been allocated by LZMA_read() */
-            allocator.Free(file->folder->cache);
-            file->folder->cache = NULL;
-        }
-        /* !!! FIXME: we don't free (file) or (file->folder)?! */
-    } /* if */
-} /* LZMA_destroy */
-
-
-static const PHYSFS_Io LZMA_Io =
-{
-    CURRENT_PHYSFS_IO_API_VERSION, NULL,
-    LZMA_read,
-    LZMA_write,
-    LZMA_seek,
-    LZMA_tell,
-    LZMA_length,
-    LZMA_duplicate,
-    LZMA_flush,
-    LZMA_destroy
-};
-
-
-static void *LZMA_openArchive(PHYSFS_Io *io, const char *name, int forWriting)
-{
-    PHYSFS_uint8 sig[k7zSignatureSize];
-    size_t len = 0;
-    LZMAarchive *archive = NULL;
-
-    assert(io != NULL);  /* shouldn't ever happen. */
-
-    BAIL_IF_MACRO(forWriting, PHYSFS_ERR_READ_ONLY, NULL);
-
-    if (io->read(io, sig, k7zSignatureSize) != k7zSignatureSize)
-        return 0;
-    BAIL_IF_MACRO(!TestSignatureCandidate(sig), PHYSFS_ERR_UNSUPPORTED, NULL);
-    BAIL_IF_MACRO(!io->seek(io, 0), ERRPASS, NULL);
-
-    archive = (LZMAarchive *) allocator.Malloc(sizeof (LZMAarchive));
-    BAIL_IF_MACRO(archive == NULL, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
-
-    lzma_archive_init(archive);
-    archive->stream.io = io;
-
-    CrcGenerateTable();
-    SzArDbExInit(&archive->db);
-    if (lzma_err(SzArchiveOpen(&archive->stream.inStream,
-                               &archive->db,
-                               &archive->stream.allocImp,
-                               &archive->stream.allocTempImp)) != SZ_OK)
-    {
-        SzArDbExFree(&archive->db, SzFreePhysicsFS);
-        lzma_archive_exit(archive);
-        return NULL; /* Error is set by lzma_err! */
-    } /* if */
-
-    len = archive->db.Database.NumFiles * sizeof (LZMAfile);
-    archive->files = (LZMAfile *) allocator.Malloc(len);
-    if (archive->files == NULL)
-    {
-        SzArDbExFree(&archive->db, SzFreePhysicsFS);
-        lzma_archive_exit(archive);
-        BAIL_MACRO(PHYSFS_ERR_OUT_OF_MEMORY, NULL);
-    }
-
-    /*
-     * Init with 0 so we know when a folder is already cached
-     * Values will be set by LZMA_openRead()
-     */
-    memset(archive->files, 0, len);
-
-    len = archive->db.Database.NumFolders * sizeof (LZMAfolder);
-    archive->folders = (LZMAfolder *) allocator.Malloc(len);
-    if (archive->folders == NULL)
-    {
-        SzArDbExFree(&archive->db, SzFreePhysicsFS);
-        lzma_archive_exit(archive);
-        BAIL_MACRO(PHYSFS_ERR_OUT_OF_MEMORY, NULL);
-    }
-
-    /*
-     * Init with 0 so we know when a folder is already cached
-     * Values will be set by LZMA_read()
-     */
-    memset(archive->folders, 0, len);
-
-    if(!lzma_files_init(archive))
-    {
-        SzArDbExFree(&archive->db, SzFreePhysicsFS);
-        lzma_archive_exit(archive);
-        BAIL_MACRO(PHYSFS_ERR_OTHER_ERROR, NULL);
-    }
-
-    return archive;
-} /* LZMA_openArchive */
-
-
-/*
- * Moved to seperate function so we can use alloca then immediately throw
- *  away the allocated stack space...
- */
-static void doEnumCallback(PHYSFS_EnumFilesCallback cb, void *callbackdata,
-                           const char *odir, const char *str, size_t flen)
-{
-    char *newstr = __PHYSFS_smallAlloc(flen + 1);
-    if (newstr == NULL)
-        return;
-
-    memcpy(newstr, str, flen);
-    newstr[flen] = '\0';
-    cb(callbackdata, odir, newstr);
-    __PHYSFS_smallFree(newstr);
-} /* doEnumCallback */
-
-
-static void LZMA_enumerateFiles(PHYSFS_Dir *opaque, const char *dname,
-                                int omitSymLinks, PHYSFS_EnumFilesCallback cb,
-                                const char *origdir, void *callbackdata)
-{
-    size_t dlen = strlen(dname),
-           dlen_inc = dlen + ((dlen > 0) ? 1 : 0);
-    LZMAarchive *archive = (LZMAarchive *) opaque;
-    LZMAfile *file = NULL,
-            *lastFile = &archive->files[archive->db.Database.NumFiles];
-        if (dlen)
-        {
-            file = lzma_find_file(archive, dname);
-            if (file != NULL) /* if 'file' is NULL it should stay so, otherwise errors will not be handled */
-                file += 1;
-        }
-        else
-        {
-            file = archive->files;
-        }
-
-    BAIL_IF_MACRO(file == NULL, PHYSFS_ERR_NO_SUCH_PATH, );
-
-    while (file < lastFile)
-    {
-        const char * fname = file->item->Name;
-        const char * dirNameEnd = fname + dlen_inc;
-
-        if (strncmp(dname, fname, dlen) != 0) /* Stop after mismatch, archive->files is sorted */
-            break;
-
-        if (strchr(dirNameEnd, '/')) /* Skip subdirs */
-        {
-            file++;
-            continue;
-        }
-
-        /* Do the actual callback... */
-        doEnumCallback(cb, callbackdata, origdir, dirNameEnd, strlen(dirNameEnd));
-
-        file++;
-    }
-} /* LZMA_enumerateFiles */
-
-
-static PHYSFS_Io *LZMA_openRead(PHYSFS_Dir *opaque, const char *name,
-                                int *fileExists)
-{
-    LZMAarchive *archive = (LZMAarchive *) opaque;
-    LZMAfile *file = lzma_find_file(archive, name);
-    PHYSFS_Io *io = NULL;
-
-    *fileExists = (file != NULL);
-    BAIL_IF_MACRO(file == NULL, PHYSFS_ERR_NO_SUCH_PATH, NULL);
-    BAIL_IF_MACRO(file->folder == NULL, PHYSFS_ERR_NOT_A_FILE, NULL);
-
-    file->position = 0;
-    file->folder->references++; /* Increase refcount for automatic cleanup... */
-
-    io = (PHYSFS_Io *) allocator.Malloc(sizeof (PHYSFS_Io));
-    BAIL_IF_MACRO(io == NULL, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
-    memcpy(io, &LZMA_Io, sizeof (*io));
-    io->opaque = file;
-
-    return io;
-} /* LZMA_openRead */
-
-
-static PHYSFS_Io *LZMA_openWrite(PHYSFS_Dir *opaque, const char *filename)
-{
-    BAIL_MACRO(PHYSFS_ERR_READ_ONLY, NULL);
-} /* LZMA_openWrite */
-
-
-static PHYSFS_Io *LZMA_openAppend(PHYSFS_Dir *opaque, const char *filename)
-{
-    BAIL_MACRO(PHYSFS_ERR_READ_ONLY, NULL);
-} /* LZMA_openAppend */
-
-
-static void LZMA_closeArchive(PHYSFS_Dir *opaque)
-{
-    LZMAarchive *archive = (LZMAarchive *) opaque;
-
-#if 0  /* !!! FIXME: you shouldn't have to do this. */
-    PHYSFS_uint32 fileIndex = 0, numFiles = archive->db.Database.NumFiles;
-    for (fileIndex = 0; fileIndex < numFiles; fileIndex++)
-    {
-        LZMA_fileClose(&archive->files[fileIndex]);
-    } /* for */
-#endif
-
-    SzArDbExFree(&archive->db, SzFreePhysicsFS);
-    archive->stream.io->destroy(archive->stream.io);
-    lzma_archive_exit(archive);
-} /* LZMA_closeArchive */
-
-
-static int LZMA_remove(PHYSFS_Dir *opaque, const char *name)
-{
-    BAIL_MACRO(PHYSFS_ERR_READ_ONLY, 0);
-} /* LZMA_remove */
-
-
-static int LZMA_mkdir(PHYSFS_Dir *opaque, const char *name)
-{
-    BAIL_MACRO(PHYSFS_ERR_READ_ONLY, 0);
-} /* LZMA_mkdir */
-
-static int LZMA_stat(PHYSFS_Dir *opaque, const char *filename,
-                     int *exists, PHYSFS_Stat *stat)
-{
-    const LZMAarchive *archive = (const LZMAarchive *) opaque;
-    const LZMAfile *file = lzma_find_file(archive, filename);
-
-    *exists = (file != 0);
-    if (!file)
-        return 0;
-
-    if(file->item->IsDirectory)
-    {
-        stat->filesize = 0;
-        stat->filetype = PHYSFS_FILETYPE_DIRECTORY;
-    } /* if */
-    else
-    {
-        stat->filesize = (PHYSFS_sint64) file->item->Size;
-        stat->filetype = PHYSFS_FILETYPE_REGULAR;
-    } /* else */
-
-    /* !!! FIXME: the 0's should be -1's? */
-    if (file->item->IsLastWriteTimeDefined)
-        stat->modtime = lzma_filetime_to_unix_timestamp(&file->item->LastWriteTime);
-    else
-        stat->modtime = 0;
-
-    /* real create and accesstype are currently not in the lzma SDK */
-    stat->createtime = stat->modtime;
-    stat->accesstime = 0;
-
-    stat->readonly = 1;  /* 7zips are always read only */
-
-    return 1;
-} /* LZMA_stat */
-
-
-const PHYSFS_Archiver __PHYSFS_Archiver_LZMA =
-{
-    {
-        "7Z",
-        "LZMA (7zip) format",
-        "Dennis Schridde <devurandom@gmx.net>",
-        "http://icculus.org/physfs/",
-    },
-    LZMA_openArchive,        /* openArchive() method    */
-    LZMA_enumerateFiles,     /* enumerateFiles() method */
-    LZMA_openRead,           /* openRead() method       */
-    LZMA_openWrite,          /* openWrite() method      */
-    LZMA_openAppend,         /* openAppend() method     */
-    LZMA_remove,             /* remove() method         */
-    LZMA_mkdir,              /* mkdir() method          */
-    LZMA_closeArchive,       /* closeArchive() method   */
-    LZMA_stat                /* stat() method           */
-};
-
-#endif  /* defined PHYSFS_SUPPORTS_7Z */
-
-/* end of lzma.c ... */
-