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57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
/* Copyright 2013 Google Inc. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/* Bit reading helpers */
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#include <stdlib.h>
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#include "./bit_reader.h"
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#include "./port.h"
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#if defined(__cplusplus) || defined(c_plusplus)
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extern "C" {
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#endif
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void BrotliInitBitReader(BrotliBitReader* const br, BrotliInput input) {
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BROTLI_DCHECK(br != NULL);
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br->input_ = input;
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br->val_ = 0;
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br->bit_pos_ = 0;
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br->avail_in = 0;
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br->eos_ = 0;
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br->tmp_bytes_read_ = 0;
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br->next_in = NULL;
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}
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void BrotliWarmupBitReader(BrotliBitReader* const br) {
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size_t i;
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br->val_ = 0;
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for (i = 0; i < sizeof(br->val_); ++i) {
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#if (BROTLI_64_BITS_LITTLE_ENDIAN)
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br->val_ |= ((uint64_t)*br->next_in) << (8 * i);
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#else
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br->val_ |= ((uint32_t)*br->next_in) << (8 * i);
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#endif
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++br->next_in;
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--br->avail_in;
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}
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}
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#if defined(__cplusplus) || defined(c_plusplus)
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} /* extern "C" */
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#endif
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