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| 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 |
| 16 extern LZMA_API(lzma_ret) |
| 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) |
| 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 } |
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