mirror of
https://github.com/google/brotli.git
synced 2024-11-25 04:50:05 +00:00
60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
/* 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
|
|
|
|
void BrotliInitBitReader(BrotliBitReader* const br,
|
|
BrotliInput input, int finish) {
|
|
assert(br != NULL);
|
|
|
|
br->finish_ = finish;
|
|
br->tmp_bytes_read_ = 0;
|
|
|
|
br->buf_ptr_ = br->buf_;
|
|
br->input_ = input;
|
|
br->val_ = 0;
|
|
br->pos_ = 0;
|
|
br->bit_pos_ = 0;
|
|
br->bit_end_pos_ = 0;
|
|
br->eos_ = 0;
|
|
}
|
|
|
|
|
|
int BrotliWarmupBitReader(BrotliBitReader* const br) {
|
|
size_t i;
|
|
|
|
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->bit_end_pos_ > 0);
|
|
}
|
|
|
|
#if defined(__cplusplus) || defined(c_plusplus)
|
|
} /* extern "C" */
|
|
#endif
|