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author | mm <mm@FreeBSD.org> | 2010-05-10 06:59:50 +0000 |
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committer | mm <mm@FreeBSD.org> | 2010-05-10 06:59:50 +0000 |
commit | 5c358d45429b654efa9c8177ecd370a7965ec1a7 (patch) | |
tree | d2d916954c6a66a3168ee356b5f24da01c2017d6 /contrib/xz/src/liblzma/common/index.h | |
parent | 3e09decd1986826f54af1a47be97bb87c1220783 (diff) | |
parent | 1008b7c6744a190c5b15aaf8cab1054671e4c7c3 (diff) | |
download | FreeBSD-src-5c358d45429b654efa9c8177ecd370a7965ec1a7.zip FreeBSD-src-5c358d45429b654efa9c8177ecd370a7965ec1a7.tar.gz |
Import of liblzma, xz, xzdec, lzmainfo from vendor branch
Add support for xz and lzma to lesspipe.sh (xzless, lzless)
Bump __FreeBSD_version
Approved by: delphij (mentor)
MFC after: 2 weeks
Diffstat (limited to 'contrib/xz/src/liblzma/common/index.h')
-rw-r--r-- | contrib/xz/src/liblzma/common/index.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/contrib/xz/src/liblzma/common/index.h b/contrib/xz/src/liblzma/common/index.h new file mode 100644 index 0000000..64e9724 --- /dev/null +++ b/contrib/xz/src/liblzma/common/index.h @@ -0,0 +1,73 @@ +/////////////////////////////////////////////////////////////////////////////// +// +/// \file index.h +/// \brief Handling of Index +// +// Author: Lasse Collin +// +// This file has been put into the public domain. +// You can do whatever you want with this file. +// +/////////////////////////////////////////////////////////////////////////////// + +#ifndef LZMA_INDEX_H +#define LZMA_INDEX_H + +#include "common.h" + + +/// Minimum Unpadded Size +#define UNPADDED_SIZE_MIN LZMA_VLI_C(5) + +/// Maximum Unpadded Size +#define UNPADDED_SIZE_MAX (LZMA_VLI_MAX & ~LZMA_VLI_C(3)) + + +/// 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); + + +/// Set for how many Records to allocate memory the next time +/// lzma_index_append() needs to allocate space for a new Record. +/// This is used only by the Index decoder. +extern void lzma_index_prealloc(lzma_index *i, lzma_vli records); + + +/// Round the variable-length integer to the next multiple of four. +static inline lzma_vli +vli_ceil4(lzma_vli vli) +{ + assert(vli <= LZMA_VLI_MAX); + return (vli + 3) & ~LZMA_VLI_C(3); +} + + +/// Calculate the size of the Index field excluding Index Padding +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; +} + + +/// Calculate the size of the Index field including Index Padding +static inline lzma_vli +index_size(lzma_vli count, lzma_vli index_list_size) +{ + return vli_ceil4(index_size_unpadded(count, index_list_size)); +} + + +/// Calculate the total size of the Stream +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 |