src/archiver_lzma.c
changeset 972 254427fc42ab
parent 924 fb5bc1b528c9
child 999 54f5a2e925ac
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/archiver_lzma.c	Fri Mar 27 15:10:42 2009 -0400
@@ -0,0 +1,735 @@
+/*
+ * 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.
+ */
+
+#if (defined PHYSFS_SUPPORTS_7Z)
+
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include "physfs.h"
+
+#define __PHYSICSFS_INTERNAL__
+#include "physfs_internal.h"
+
+#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 */
+    void *file; /* 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 = __PHYSFS_platformRead(s->file, s->buffer, 1, 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!
+    size_t processedSizeLoc = __PHYSFS_platformRead(s->file, buffer, 1, size);
+    if (processedSize != 0)
+        *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 (__PHYSFS_platformSeek(s->file, (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, PHYSFS_uint32 one, PHYSFS_uint32 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, PHYSFS_uint32 one, PHYSFS_uint32 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(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, ERR_NO_SUCH_FILE, 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, 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(ERR_DATA_ERROR);
+            break;
+        case SZE_OUTOFMEMORY:
+            __PHYSFS_setError(ERR_OUT_OF_MEMORY);
+            break;
+        case SZE_CRC_ERROR:
+            __PHYSFS_setError(ERR_CORRUPTED);
+            break;
+        case SZE_NOTIMPL:
+            __PHYSFS_setError(ERR_NOT_IMPLEMENTED);
+            break;
+        case SZE_FAIL:
+            __PHYSFS_setError(ERR_UNKNOWN_ERROR);  /* !!! FIXME: right? */
+            break;
+        case SZE_ARCHIVE_ERROR:
+            __PHYSFS_setError(ERR_CORRUPTED);  /* !!! FIXME: right? */
+            break;
+        default:
+            __PHYSFS_setError(ERR_UNKNOWN_ERROR);
+    } /* switch */
+
+    return(rc);
+} /* lzma_err */
+
+
+static PHYSFS_sint64 LZMA_read(fvoid *opaque, void *outBuffer,
+                               PHYSFS_uint32 objSize, PHYSFS_uint32 objCount)
+{
+    LZMAfile *file = (LZMAfile *) opaque;
+
+    size_t wantedSize = objSize*objCount;
+    size_t remainingSize = file->item->Size - file->position;
+    size_t fileSize = 0;
+
+    BAIL_IF_MACRO(wantedSize == 0, NULL, 0); /* quick rejection. */
+    BAIL_IF_MACRO(remainingSize == 0, ERR_PAST_EOF, 0);
+
+    if (remainingSize < wantedSize)
+    {
+        wantedSize = remainingSize - (remainingSize % objSize);
+        objCount = (PHYSFS_uint32) (remainingSize / objSize);
+        BAIL_IF_MACRO(objCount == 0, ERR_PAST_EOF, 0); /* quick rejection. */
+        __PHYSFS_setError(ERR_PAST_EOF); /* this is always true here. */
+    } /* if */
+
+    /* Only decompress the folder if it is not allready cached */
+    if (file->folder->cache == NULL)
+    {
+        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 outBuffer */
+    memcpy(outBuffer,
+            (file->folder->cache +
+                    file->offset + file->position),
+            wantedSize);
+    file->position += wantedSize; /* Increase virtual position */
+
+    return objCount;
+} /* LZMA_read */
+
+
+static PHYSFS_sint64 LZMA_write(fvoid *opaque, const void *buf,
+                               PHYSFS_uint32 objSize, PHYSFS_uint32 objCount)
+{
+    BAIL_MACRO(ERR_NOT_SUPPORTED, -1);
+} /* LZMA_write */
+
+
+static int LZMA_eof(fvoid *opaque)
+{
+    LZMAfile *file = (LZMAfile *) opaque;
+    return (file->position >= file->item->Size);
+} /* LZMA_eof */
+
+
+static PHYSFS_sint64 LZMA_tell(fvoid *opaque)
+{
+    LZMAfile *file = (LZMAfile *) opaque;
+    return (file->position);
+} /* LZMA_tell */
+
+
+static int LZMA_seek(fvoid *opaque, PHYSFS_uint64 offset)
+{
+    LZMAfile *file = (LZMAfile *) opaque;
+
+    BAIL_IF_MACRO(offset < 0, ERR_SEEK_OUT_OF_RANGE, 0);
+    BAIL_IF_MACRO(offset > file->item->Size, ERR_PAST_EOF, 0);
+
+    file->position = offset; /* We only use a virtual position... */
+
+    return 1;
+} /* LZMA_seek */
+
+
+static PHYSFS_sint64 LZMA_fileLength(fvoid *opaque)
+{
+    LZMAfile *file = (LZMAfile *) opaque;
+    return (file->item->Size);
+} /* LZMA_fileLength */
+
+
+static int LZMA_fileClose(fvoid *opaque)
+{
+    LZMAfile *file = (LZMAfile *) opaque;
+
+    BAIL_IF_MACRO(file->folder == NULL, ERR_NOT_A_FILE, 0);
+
+	/* 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;
+    }
+
+    return(1);
+} /* LZMA_fileClose */
+
+
+static int LZMA_isArchive(const char *filename, int forWriting)
+{
+    PHYSFS_uint8 sig[k7zSignatureSize];
+    void *in;
+
+    BAIL_IF_MACRO(forWriting, ERR_ARC_IS_READ_ONLY, 0);
+
+    in = __PHYSFS_platformOpenRead(filename);
+    BAIL_IF_MACRO(in == NULL, NULL, 0);
+
+    /* Read signature bytes */
+    if (__PHYSFS_platformRead(in, sig, k7zSignatureSize, 1) != 1)
+    {
+        __PHYSFS_platformClose(in); // Don't forget to close the file before returning...
+        BAIL_MACRO(NULL, 0);
+    }
+
+    __PHYSFS_platformClose(in);
+
+    /* Test whether sig is the 7z signature */
+    return(TestSignatureCandidate(sig));
+} /* LZMA_isArchive */
+
+
+static void *LZMA_openArchive(const char *name, int forWriting)
+{
+    size_t len = 0;
+    LZMAarchive *archive = NULL;
+
+    BAIL_IF_MACRO(forWriting, ERR_ARC_IS_READ_ONLY, NULL);
+    BAIL_IF_MACRO(!LZMA_isArchive(name,forWriting), ERR_UNSUPPORTED_ARCHIVE, 0);
+
+    archive = (LZMAarchive *) allocator.Malloc(sizeof (LZMAarchive));
+    BAIL_IF_MACRO(archive == NULL, ERR_OUT_OF_MEMORY, NULL);
+
+    lzma_archive_init(archive);
+
+    if ( (archive->stream.file = __PHYSFS_platformOpenRead(name)) == NULL )
+    {
+        __PHYSFS_platformClose(archive->stream.file);
+        lzma_archive_exit(archive);
+        return(NULL); // Error is set by platformOpenRead!
+    }
+
+    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);
+        __PHYSFS_platformClose(archive->stream.file);
+        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);
+        __PHYSFS_platformClose(archive->stream.file);
+        lzma_archive_exit(archive);
+        BAIL_MACRO(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);
+        __PHYSFS_platformClose(archive->stream.file);
+        lzma_archive_exit(archive);
+        BAIL_MACRO(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);
+        __PHYSFS_platformClose(archive->stream.file);
+        lzma_archive_exit(archive);
+        BAIL_MACRO(ERR_UNKNOWN_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(dvoid *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, ERR_NO_SUCH_FILE, );
+
+    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 int LZMA_exists(dvoid *opaque, const char *name)
+{
+    LZMAarchive *archive = (LZMAarchive *) opaque;
+    return(lzma_find_file(archive, name) != NULL);
+} /* LZMA_exists */
+
+
+static PHYSFS_sint64 LZMA_getLastModTime(dvoid *opaque,
+                                         const char *name,
+                                         int *fileExists)
+{
+    LZMAarchive *archive = (LZMAarchive *) opaque;
+    LZMAfile *file = lzma_find_file(archive, name);
+
+    *fileExists = (file != NULL);
+
+    BAIL_IF_MACRO(file == NULL, NULL, -1);
+	BAIL_IF_MACRO(!file->item->IsLastWriteTimeDefined, NULL, -1); // write-time may not be defined for every file
+
+    return(lzma_filetime_to_unix_timestamp(&file->item->LastWriteTime));
+} /* LZMA_getLastModTime */
+
+
+static int LZMA_isDirectory(dvoid *opaque, const char *name, int *fileExists)
+{
+    LZMAarchive *archive = (LZMAarchive *) opaque;
+    LZMAfile *file = lzma_find_file(archive, name);
+
+    *fileExists = (file != NULL);
+
+    return(file == NULL ? 0 : file->item->IsDirectory);
+} /* LZMA_isDirectory */
+
+
+static int LZMA_isSymLink(dvoid *opaque, const char *name, int *fileExists)
+{
+    BAIL_MACRO(ERR_NOT_SUPPORTED, 0);
+} /* LZMA_isSymLink */
+
+
+static fvoid *LZMA_openRead(dvoid *opaque, const char *name, int *fileExists)
+{
+    LZMAarchive *archive = (LZMAarchive *) opaque;
+    LZMAfile *file = lzma_find_file(archive, name);
+
+    *fileExists = (file != NULL);
+    BAIL_IF_MACRO(file == NULL, ERR_NO_SUCH_FILE, NULL);
+    BAIL_IF_MACRO(file->folder == NULL, ERR_NOT_A_FILE, NULL);
+
+    file->folder->references++; // Increase refcount for automatic cleanup...
+
+    return(file);
+} /* LZMA_openRead */
+
+
+static fvoid *LZMA_openWrite(dvoid *opaque, const char *filename)
+{
+    BAIL_MACRO(ERR_NOT_SUPPORTED, NULL);
+} /* LZMA_openWrite */
+
+
+static fvoid *LZMA_openAppend(dvoid *opaque, const char *filename)
+{
+    BAIL_MACRO(ERR_NOT_SUPPORTED, NULL);
+} /* LZMA_openAppend */
+
+
+static void LZMA_dirClose(dvoid *opaque)
+{
+    LZMAarchive *archive = (LZMAarchive *) opaque;
+    PHYSFS_uint32 fileIndex = 0, numFiles = archive->db.Database.NumFiles;
+
+    for (fileIndex = 0; fileIndex < numFiles; fileIndex++)
+    {
+        LZMA_fileClose(&archive->files[fileIndex]);
+    } /* for */
+
+    SzArDbExFree(&archive->db, SzFreePhysicsFS);
+    __PHYSFS_platformClose(archive->stream.file);
+    lzma_archive_exit(archive);
+} /* LZMA_dirClose */
+
+
+static int LZMA_remove(dvoid *opaque, const char *name)
+{
+    BAIL_MACRO(ERR_NOT_SUPPORTED, 0);
+} /* LZMA_remove */
+
+
+static int LZMA_mkdir(dvoid *opaque, const char *name)
+{
+    BAIL_MACRO(ERR_NOT_SUPPORTED, 0);
+} /* LZMA_mkdir */
+
+
+const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_LZMA =
+{
+    "7Z",
+    LZMA_ARCHIVE_DESCRIPTION,
+    "Dennis Schridde <devurandom@gmx.net>",
+    "http://icculus.org/physfs/",
+};
+
+
+const PHYSFS_Archiver __PHYSFS_Archiver_LZMA =
+{
+    &__PHYSFS_ArchiveInfo_LZMA,
+    LZMA_isArchive,          /* isArchive() method      */
+    LZMA_openArchive,        /* openArchive() method    */
+    LZMA_enumerateFiles,     /* enumerateFiles() method */
+    LZMA_exists,             /* exists() method         */
+    LZMA_isDirectory,        /* isDirectory() method    */
+    LZMA_isSymLink,          /* isSymLink() method      */
+    LZMA_getLastModTime,     /* getLastModTime() method */
+    LZMA_openRead,           /* openRead() method       */
+    LZMA_openWrite,          /* openWrite() method      */
+    LZMA_openAppend,         /* openAppend() method     */
+    LZMA_remove,             /* remove() method         */
+    LZMA_mkdir,              /* mkdir() method          */
+    LZMA_dirClose,           /* dirClose() method       */
+    LZMA_read,               /* read() method           */
+    LZMA_write,              /* write() method          */
+    LZMA_eof,                /* eof() method            */
+    LZMA_tell,               /* tell() method           */
+    LZMA_seek,               /* seek() method           */
+    LZMA_fileLength,         /* fileLength() method     */
+    LZMA_fileClose           /* fileClose() method      */
+};
+
+#endif  /* defined PHYSFS_SUPPORTS_7Z */
+
+/* end of lzma.c ... */
+