| /////////////////////////////////////////////////////////////////////////////// |
| // |
| /// \file filter_flags_decoder.c |
| /// \brief Decodes a Filter Flags field |
| // |
| // Copyright (C) 2007 Lasse Collin |
| // |
| // This library is free software; you can redistribute it and/or |
| // modify it under the terms of the GNU Lesser General Public |
| // License as published by the Free Software Foundation; either |
| // version 2.1 of the License, or (at your option) any later version. |
| // |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| // Lesser General Public License for more details. |
| // |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #include "filter_decoder.h" |
| |
| |
| extern LZMA_API lzma_ret |
| lzma_filter_flags_decode( |
| lzma_filter *filter, lzma_allocator *allocator, |
| const uint8_t *in, size_t *in_pos, size_t in_size) |
| { |
| // Set the pointer to NULL so the caller can always safely free it. |
| filter->options = NULL; |
| |
| // Filter ID |
| return_if_error(lzma_vli_decode(&filter->id, NULL, |
| in, in_pos, in_size)); |
| |
| if (filter->id >= LZMA_FILTER_RESERVED_START) |
| return LZMA_DATA_ERROR; |
| |
| // Size of Properties |
| lzma_vli props_size; |
| return_if_error(lzma_vli_decode(&props_size, NULL, |
| in, in_pos, in_size)); |
| |
| // Filter Properties |
| if (in_size - *in_pos < props_size) |
| return LZMA_DATA_ERROR; |
| |
| const lzma_ret ret = lzma_properties_decode( |
| filter, allocator, in + *in_pos, props_size); |
| |
| *in_pos += props_size; |
| |
| return ret; |
| } |