130625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka/* Copyright 2013 Google Inc. All Rights Reserved. 230625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka 330625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka Licensed under the Apache License, Version 2.0 (the "License"); 430625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka you may not use this file except in compliance with the License. 530625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka You may obtain a copy of the License at 630625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka 730625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka http://www.apache.org/licenses/LICENSE-2.0 830625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka 930625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka Unless required by applicable law or agreed to in writing, software 1030625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka distributed under the License is distributed on an "AS IS" BASIS, 1130625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1230625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka See the License for the specific language governing permissions and 1330625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka limitations under the License. 1430625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka 1530625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka Bit reading helpers 1630625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka*/ 1704163a87d098f14e890c2a3fd240af7f09099711Zoltan Szabadka 1804163a87d098f14e890c2a3fd240af7f09099711Zoltan Szabadka#include <assert.h> 191571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka#include <stdlib.h> 2004163a87d098f14e890c2a3fd240af7f09099711Zoltan Szabadka 2104163a87d098f14e890c2a3fd240af7f09099711Zoltan Szabadka#include "./bit_reader.h" 2204163a87d098f14e890c2a3fd240af7f09099711Zoltan Szabadka 2304163a87d098f14e890c2a3fd240af7f09099711Zoltan Szabadka#if defined(__cplusplus) || defined(c_plusplus) 2404163a87d098f14e890c2a3fd240af7f09099711Zoltan Szabadkaextern "C" { 2504163a87d098f14e890c2a3fd240af7f09099711Zoltan Szabadka#endif 2604163a87d098f14e890c2a3fd240af7f09099711Zoltan Szabadka 271571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadkaint BrotliInitBitReader(BrotliBitReader* const br, BrotliInput input) { 2804163a87d098f14e890c2a3fd240af7f09099711Zoltan Szabadka size_t i; 2904163a87d098f14e890c2a3fd240af7f09099711Zoltan Szabadka assert(br != NULL); 3004163a87d098f14e890c2a3fd240af7f09099711Zoltan Szabadka 31dfc5a9f2151a7c88914c236c7db8fa119fee249cZoltan Szabadka br->buf_ptr_ = br->buf_; 321571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka br->input_ = input; 3304163a87d098f14e890c2a3fd240af7f09099711Zoltan Szabadka br->val_ = 0; 3404163a87d098f14e890c2a3fd240af7f09099711Zoltan Szabadka br->pos_ = 0; 3504163a87d098f14e890c2a3fd240af7f09099711Zoltan Szabadka br->bit_pos_ = 0; 36cbd5cb55f487eda746b0d6f8b5742b5a8e5c846aZoltan Szabadka br->bit_end_pos_ = 0; 3704163a87d098f14e890c2a3fd240af7f09099711Zoltan Szabadka br->eos_ = 0; 381571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka if (!BrotliReadMoreInput(br)) { 391571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka return 0; 4004163a87d098f14e890c2a3fd240af7f09099711Zoltan Szabadka } 411571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka for (i = 0; i < sizeof(br->val_); ++i) { 421571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka br->val_ |= ((uint64_t)br->buf_[br->pos_]) << (8 * i); 4304163a87d098f14e890c2a3fd240af7f09099711Zoltan Szabadka ++br->pos_; 4404163a87d098f14e890c2a3fd240af7f09099711Zoltan Szabadka } 45cbd5cb55f487eda746b0d6f8b5742b5a8e5c846aZoltan Szabadka return (br->bit_end_pos_ > 0); 4604163a87d098f14e890c2a3fd240af7f09099711Zoltan Szabadka} 4704163a87d098f14e890c2a3fd240af7f09099711Zoltan Szabadka 4804163a87d098f14e890c2a3fd240af7f09099711Zoltan Szabadka#if defined(__cplusplus) || defined(c_plusplus) 4930625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka} /* extern "C" */ 5004163a87d098f14e890c2a3fd240af7f09099711Zoltan Szabadka#endif 51