1///////////////////////////////////////////////////////////////////////////////
2//
3/// \file       filter_flags_encoder.c
4/// \brief      Decodes a Filter Flags field
5//
6//  Author:     Lasse Collin
7//
8//  This file has been put into the public domain.
9//  You can do whatever you want with this file.
10//
11///////////////////////////////////////////////////////////////////////////////
12
13#include "filter_encoder.h"
14
15
16extern LZMA_API(lzma_ret)
17lzma_filter_flags_size(uint32_t *size, const lzma_filter *filter)
18{
19	if (filter->id >= LZMA_FILTER_RESERVED_START)
20		return LZMA_PROG_ERROR;
21
22	return_if_error(lzma_properties_size(size, filter));
23
24	*size += lzma_vli_size(filter->id) + lzma_vli_size(*size);
25
26	return LZMA_OK;
27}
28
29
30extern LZMA_API(lzma_ret)
31lzma_filter_flags_encode(const lzma_filter *filter,
32		uint8_t *out, size_t *out_pos, size_t out_size)
33{
34	// Filter ID
35	if (filter->id >= LZMA_FILTER_RESERVED_START)
36		return LZMA_PROG_ERROR;
37
38	return_if_error(lzma_vli_encode(filter->id, NULL,
39			out, out_pos, out_size));
40
41	// Size of Properties
42	uint32_t props_size;
43	return_if_error(lzma_properties_size(&props_size, filter));
44	return_if_error(lzma_vli_encode(props_size, NULL,
45			out, out_pos, out_size));
46
47	// Filter Properties
48	if (out_size - *out_pos < props_size)
49		return LZMA_PROG_ERROR;
50
51	return_if_error(lzma_properties_encode(filter, out + *out_pos));
52
53	*out_pos += props_size;
54
55	return LZMA_OK;
56}
57