From 5d018dc03549c1ee4958364712fb0c94e1bf2741 Mon Sep 17 00:00:00 2001 From: Lasse Collin Date: Sun, 9 Dec 2007 00:42:33 +0200 Subject: Imported to git. --- src/liblzma/api/lzma/metadata.h | 100 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 100 insertions(+) create mode 100644 src/liblzma/api/lzma/metadata.h (limited to 'src/liblzma/api/lzma/metadata.h') diff --git a/src/liblzma/api/lzma/metadata.h b/src/liblzma/api/lzma/metadata.h new file mode 100644 index 00000000..69592a3a --- /dev/null +++ b/src/liblzma/api/lzma/metadata.h @@ -0,0 +1,100 @@ +/** + * \file lzma/metadata.h + * \brief Metadata handling + * + * \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 instead. +#endif + + +/** + * \brief Information stored into a Metadata Block + * + * This structure holds all the information that can be stored to + * a Metadata Block. + */ +typedef struct { + /** + * \brief Size of Header Metadata Block + */ + lzma_vli header_metadata_size; + + /** + * \brief Total Size of the Stream + */ + lzma_vli total_size; + + /** + * \brief Uncompressed Size of the Stream + */ + lzma_vli uncompressed_size; + + /** + * \brief Index of the Blocks stored in the Stream + */ + lzma_index *index; + + /** + * \brief Extra information + */ + lzma_extra *extra; + +} lzma_metadata; + + +/** + * \brief Calculate the encoded size of Metadata + * + * \return Uncompressed size of the Metadata in encoded form. This value + * may be passed to Block encoder as Uncompressed Size when using + * Metadata filter. On error, zero is returned. + */ +extern lzma_vli lzma_metadata_size(const lzma_metadata *metadata); + + +/** + * \brief Initializes Metadata encoder + * + * \param coder Pointer to a pointer to hold Metadata encoder's + * internal state. Original value is ignored, thus + * you don't need to initialize the pointer. + * \param allocator Custom memory allocator; usually NULL. + * \param metadata Pointer to Metadata to encoded + * + * \return - LZMA_OK: Initialization succeeded. + * - LZMA_MEM_ERROR: Cannot allocate memory for *coder. + * + * The initialization function makes internal copy of the *metadata structure. + * However, the linked lists metadata->index and metadata->extra are NOT + * copied. Thus, the application may destroy *metadata after initialization + * if it likes, but not Index or Extra. + */ +extern lzma_ret lzma_metadata_encoder(lzma_stream *strm, + lzma_options_block *options, const lzma_metadata *metadata); + + +/** + * \brief Initializes Metadata decoder + * + * \param want_extra If this is true, Extra Records will be stored + * to metadata->extra. If this is false, Extra + * Records will be parsed but not stored anywhere, + * metadata->extra will be set to NULL. + */ +extern lzma_ret lzma_metadata_decoder( + lzma_stream *strm, lzma_options_block *options, + lzma_metadata *metadata, lzma_bool want_extra); -- cgit v1.2.3