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 } 57