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"
19 typedef struct lzma_simple_s lzma_simple;
22 /// Next filter in the chain
25 /// True if the next coder in the chain has returned LZMA_STREAM_END
26 /// or if we have processed uncompressed_size bytes.
29 /// True if filter() should encode the data; false to decode.
30 /// Currently all simple filters use the same function for encoding
31 /// and decoding, because the difference between encoders and decoders
35 /// Pointer to filter-specific function, which does
36 /// the actual filtering.
37 size_t (*filter)(lzma_simple *simple, uint32_t now_pos,
38 bool is_encoder, uint8_t *buffer, size_t size);
40 /// Pointer to filter-specific data, or NULL if filter doesn't need
44 /// The lowest 32 bits of the current position in the data. Most
45 /// filters need this to do conversions between absolute and relative
49 /// Size of the memory allocated for the buffer.
52 /// Flushing position in the temporary buffer. buffer[pos] is the
53 /// next byte to be copied to out[].
56 /// buffer[filtered] is the first unfiltered byte. When pos is smaller
57 /// than filtered, there is unflushed filtered data in the buffer.
60 /// Total number of bytes (both filtered and unfiltered) currently
61 /// in the temporary buffer.
69 extern lzma_ret lzma_simple_coder_init(lzma_next_coder *next,
70 lzma_allocator *allocator, const lzma_filter_info *filters,
71 size_t (*filter)(lzma_simple *simple, uint32_t now_pos,
72 bool is_encoder, uint8_t *buffer, size_t size),
73 size_t simple_size, size_t unfiltered_max,
74 uint32_t alignment, bool is_encoder);