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authorLasse Collin <lasse.collin@tukaani.org>2008-06-18 18:02:10 +0300
committerLasse Collin <lasse.collin@tukaani.org>2008-06-18 18:02:10 +0300
commit7d17818cec8597f847b0a2537fde991bbc3d9e96 (patch)
tree9c41502e3eb96f103fe98e13456b382fbba7a292 /src/liblzma/api/lzma/extra.h
parentUpdate the file format specification draft. The new one is (diff)
downloadxz-7d17818cec8597f847b0a2537fde991bbc3d9e96.tar.xz
Update the code to mostly match the new simpler file format
specification. Simplify things by removing most of the support for known uncompressed size in most places. There are some miscellaneous changes here and there too. The API of liblzma has got many changes and still some more will be done soon. While most of the code has been updated, some things are not fixed (the command line tool will choke with invalid filter chain, if nothing else). Subblock filter is somewhat broken for now. It will be updated once the encoded format of the Subblock filter has been decided.
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1 files changed, 0 insertions, 114 deletions
diff --git a/src/liblzma/api/lzma/extra.h b/src/liblzma/api/lzma/extra.h
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--- a/src/liblzma/api/lzma/extra.h
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-/**
- * \file lzma/extra.h
- * \brief Handling of Extra Records in Metadata
- *
- * \author Copyright (C) 1999-2006 Igor Pavlov
- * \author Copyright (C) 2007 Lasse Collin
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- */
-
-#ifndef LZMA_H_INTERNAL
-# error Never include this file directly. Use <lzma.h> instead.
-#endif
-
-
-/*
- * Extra Record IDs
- *
- * See the .lzma file format specification for description what each
- * Extra Record type exactly means.
- *
- * If you ever need to update .lzma files with Extra Records, note that
- * the Record IDs are divided in two categories:
- * - Safe-to-Copy Records may be preserved as is when the
- * Stream is modified in ways that don't change the actual
- * uncompressed data. Examples of such operatings include
- * recompressing and adding, modifying, or deleting unrelated
- * Extra Records.
- * - Unsafe-to-Copy Records should be removed (and possibly
- * recreated) when any kind of changes are made to the Stream.
- */
-
-#define LZMA_EXTRA_PADDING 0x00
-#define LZMA_EXTRA_OPENPGP 0x01
-#define LZMA_EXTRA_FILTERS 0x02
-#define LZMA_EXTRA_COMMENT 0x03
-#define LZMA_EXTRA_CHECKS 0x04
-#define LZMA_EXTRA_FILENAME 0x05
-#define LZMA_EXTRA_MTIME 0x07
-#define LZMA_EXTRA_MTIME_HR 0x09
-#define LZMA_EXTRA_MIME_TYPE 0x0B
-#define LZMA_EXTRA_HOMEPAGE 0x0D
-
-
-/**
- * \brief Extra Records
- *
- * The .lzma format provides a way to store custom information along
- * the actual compressed content. Information about these Records
- * are passed to and from liblzma via this linked list.
- */
-typedef struct lzma_extra_s lzma_extra;
-struct lzma_extra_s {
- /**
- * \brief Pointer to the next Extra Record
- *
- * This is NULL on the last Extra Record.
- */
- lzma_extra *next;
-
- /**
- * \brief Record ID
- *
- * Extra Record IDs are divided in three categories:
- * - Zero is a special case used for padding. It doesn't have
- * Size of Data fields.
- * - Odd IDs (1, 3, 5, ...) are Safe-to-Copy IDs.
- * These can be preserved as is if the Stream is
- * modified in a way that doesn't alter the actual
- * uncompressed content.
- * - Even IDs (2, 4, 6, ...) are Unsafe-to-Copy IDs.
- * If the .lzma Stream is modified in any way,
- * the Extra Records having a sensitive ID should
- * be removed or updated accordingly.
- *
- * Refer to the .lzma file format specification for
- * the up to date list of Extra Record IDs.
- */
- lzma_vli id;
-
- /**
- * \brief Size of the Record data
- *
- * In case of strings, this should not include the
- * trailing '\0'.
- */
- size_t size;
-
- /**
- * \brief Record data
- *
- * Record data is often a string in UTF-8 encoding,
- * but it can be arbitrary binary data. In case of
- * strings, the trailing '\0' is usually not stored
- * in the .lzma file.
- *
- * To ease working with Extra Records containing strings,
- * liblzma always adds '\0' to the end of data even when
- * it wasn't present in the .lzma file. This '\0' is not
- * counted in the size of the data.
- */
- uint8_t *data;
-};
-
-
-extern void lzma_extra_free(lzma_extra *extra, lzma_allocator *allocator);