1 /////////////////////////////////////////////////////////////////////////////// 2 // 3 /// \file simple_encoder.c 4 /// \brief Properties encoder for simple filters 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 "simple_encoder.h" 14 15 16 extern lzma_ret 17 lzma_simple_props_size(uint32_t *size, const void *options) 18 { 19 const lzma_options_bcj *const opt = options; 20 *size = (opt == NULL || opt->start_offset == 0) ? 0 : 4; 21 return LZMA_OK; 22 } 23 24 25 extern lzma_ret 26 lzma_simple_props_encode(const void *options, uint8_t *out) 27 { 28 const lzma_options_bcj *const opt = options; 29 30 // The default start offset is zero, so we don't need to store any 31 // options unless the start offset is non-zero. 32 if (opt == NULL || opt->start_offset == 0) 33 return LZMA_OK; 34 35 unaligned_write32le(out, opt->start_offset); 36 37 return LZMA_OK; 38 } 39