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///////////////////////////////////////////////////////////////////////////////
//
/// \file index.h
/// \brief Handling of Index
//
// Copyright (C) 2008 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_INDEX_H
#define LZMA_INDEX_H
#include "common.h"
/// Maximum encoded value of Total Size.
#define TOTAL_SIZE_ENCODED_MAX (LZMA_VLI_MAX / 4 - 1)
/// Convert the real Total Size value to a value that is stored to the Index.
#define total_size_encode(size) ((size) / 4 - 1)
/// Convert the encoded Total Size value from Index to the real Total Size.
#define total_size_decode(size) (((size) + 1) * 4)
/// Get the size of the Index Padding field. This is needed by Index encoder
/// and decoder, but applications should have no use for this.
extern uint32_t lzma_index_padding_size(const lzma_index *i);
static inline lzma_vli
index_size_unpadded(lzma_vli count, lzma_vli index_list_size)
{
// Index Indicator + Number of Records + List of Records + CRC32
return 1 + lzma_vli_size(count) + index_list_size + 4;
}
static inline lzma_vli
index_size(lzma_vli count, lzma_vli index_list_size)
{
// Round up to a mulitiple of four.
return (index_size_unpadded(count, index_list_size) + 3)
& ~LZMA_VLI_C(3);
}
static inline lzma_vli
index_stream_size(
lzma_vli total_size, lzma_vli count, lzma_vli index_list_size)
{
return LZMA_STREAM_HEADER_SIZE + total_size
+ index_size(count, index_list_size)
+ LZMA_STREAM_HEADER_SIZE;
}
#endif
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