1 ///////////////////////////////////////////////////////////////////////////////
2 //
3 /// \file filter_flags_encoder.c
4 /// \brief Encodes 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
16 extern LZMA_API(lzma_ret)
lzma_filter_flags_size(uint32_t * size,const lzma_filter * filter)17 lzma_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
30 extern LZMA_API(lzma_ret)
lzma_filter_flags_encode(const lzma_filter * filter,uint8_t * out,size_t * out_pos,size_t out_size)31 lzma_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