1 ///////////////////////////////////////////////////////////////////////////////
3 /// \file simple_private.h
4 /// \brief Private definitions for so called simple filters
6 // Author: Lasse Collin
8 // This file has been put into the public domain.
9 // You can do whatever you want with this file.
11 ///////////////////////////////////////////////////////////////////////////////
13 #ifndef LZMA_SIMPLE_PRIVATE_H
14 #define LZMA_SIMPLE_PRIVATE_H
16 #include "simple_coder.h"
20 /// Next filter in the chain
23 /// True if the next coder in the chain has returned LZMA_STREAM_END.
26 /// True if filter() should encode the data; false to decode.
27 /// Currently all simple filters use the same function for encoding
28 /// and decoding, because the difference between encoders and decoders
32 /// Pointer to filter-specific function, which does
33 /// the actual filtering.
34 size_t (*filter)(void *simple, uint32_t now_pos,
35 bool is_encoder, uint8_t *buffer, size_t size);
37 /// Pointer to filter-specific data, or NULL if filter doesn't need
41 /// The lowest 32 bits of the current position in the data. Most
42 /// filters need this to do conversions between absolute and relative
46 /// Size of the memory allocated for the buffer.
49 /// Flushing position in the temporary buffer. buffer[pos] is the
50 /// next byte to be copied to out[].
53 /// buffer[filtered] is the first unfiltered byte. When pos is smaller
54 /// than filtered, there is unflushed filtered data in the buffer.
57 /// Total number of bytes (both filtered and unfiltered) currently
58 /// in the temporary buffer.
66 extern lzma_ret lzma_simple_coder_init(lzma_next_coder *next,
67 const lzma_allocator *allocator,
68 const lzma_filter_info *filters,
69 size_t (*filter)(void *simple, uint32_t now_pos,
70 bool is_encoder, uint8_t *buffer, size_t size),
71 size_t simple_size, size_t unfiltered_max,
72 uint32_t alignment, bool is_encoder);