index.h

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// SPDX-License-Identifier: 0BSD
 
//
//
//  Author:     Lasse Collin
//
 
#ifndef LZMA_INDEX_H
#define LZMA_INDEX_H
 
 
#define UNPADDED_SIZE_MIN LZMA_VLI_C(5)
 
#define UNPADDED_SIZE_MAX (LZMA_VLI_MAX & ~LZMA_VLI_C(3))
 
#define INDEX_INDICATOR 0
 
 
extern uint32_t lzma_index_padding_size(const lzma_index *i);
 
 
extern void lzma_index_prealloc(lzma_index *i, lzma_vli records);
 
 
static inline lzma_vli
vli_ceil4(lzma_vli vli)
{
    assert(vli <= UNPADDED_SIZE_MAX);
    return (vli + 3) & ~LZMA_VLI_C(3);
}
 
 
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)
{
    return vli_ceil4(index_size_unpadded(count, index_list_size));
}
 
 
static inline lzma_vli
index_stream_size(lzma_vli blocks_size,
        lzma_vli count, lzma_vli index_list_size)
{
    return LZMA_STREAM_HEADER_SIZE + blocks_size
            + index_size(count, index_list_size)
            + LZMA_STREAM_HEADER_SIZE;
}
 
#endif