| // Copyright 2013 Google Inc. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| // Bit reading helpers |
| |
| #include <assert.h> |
| #include <stdlib.h> |
| |
| #include "./bit_reader.h" |
| |
| #if defined(__cplusplus) || defined(c_plusplus) |
| extern "C" { |
| #endif |
| |
| int BrotliInitBitReader(BrotliBitReader* const br, BrotliInput input) { |
| size_t i; |
| assert(br != NULL); |
| |
| br->input_ = input; |
| br->val_ = 0; |
| br->pos_ = 0; |
| br->bit_pos_ = 0; |
| br->end_pos_ = 0; |
| br->eos_ = 0; |
| if (!BrotliReadMoreInput(br)) { |
| return 0; |
| } |
| for (i = 0; i < sizeof(br->val_); ++i) { |
| br->val_ |= ((uint64_t)br->buf_[br->pos_]) << (8 * i); |
| ++br->pos_; |
| } |
| return (br->end_pos_ > 0); |
| } |
| |
| #if defined(__cplusplus) || defined(c_plusplus) |
| } // extern "C" |
| #endif |