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44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
/*
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* Copyright 2024 Google LLC
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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#include "packbits.h"
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#include <string.h>
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void packbits_unpack(const char* src, int src_length, uint8_t* dest) {
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int length = 0;
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while (length < src_length) {
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int8_t header = *((int8_t*) src++);
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length++;
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if (header >= 0) {
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int count = header + 1;
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memcpy(dest, src, count);
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dest += count;
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src += count;
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length += count;
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} else {
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int count = 1 - header;
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memset(dest, *src, count);
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dest += count;
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src += 1;
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length += 1;
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}
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}
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}
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