72 lines
1.8 KiB
C++
72 lines
1.8 KiB
C++
/* Copyright 2013 Google Inc. All Rights Reserved.
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Distributed under MIT license.
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See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
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*/
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/* Helper functions for storing integer values into byte streams.
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No bounds checking is performed, that is the responsibility of the caller. */
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#ifndef WOFF2_STORE_BYTES_H_
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#define WOFF2_STORE_BYTES_H_
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#include <inttypes.h>
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#include <stddef.h>
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#include <string.h>
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#include "./port.h"
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namespace woff2 {
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inline size_t StoreU32(uint8_t* dst, size_t offset, uint32_t x) {
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dst[offset] = x >> 24;
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dst[offset + 1] = x >> 16;
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dst[offset + 2] = x >> 8;
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dst[offset + 3] = x;
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return offset + 4;
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}
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inline size_t Store16(uint8_t* dst, size_t offset, int x) {
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#if defined(WOFF_LITTLE_ENDIAN)
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*reinterpret_cast<uint16_t*>(dst + offset) =
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((x & 0xFF) << 8) | ((x & 0xFF00) >> 8);
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#elif defined(WOFF_BIG_ENDIAN)
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*reinterpret_cast<uint16_t*>(dst + offset) = static_cast<uint16_t>(x);
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#else
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dst[offset] = x >> 8;
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dst[offset + 1] = x;
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#endif
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return offset + 2;
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}
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inline void StoreU32(uint32_t val, size_t* offset, uint8_t* dst) {
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dst[(*offset)++] = val >> 24;
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dst[(*offset)++] = val >> 16;
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dst[(*offset)++] = val >> 8;
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dst[(*offset)++] = val;
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}
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inline void Store16(int val, size_t* offset, uint8_t* dst) {
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#if defined(WOFF_LITTLE_ENDIAN)
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*reinterpret_cast<uint16_t*>(dst + *offset) =
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((val & 0xFF) << 8) | ((val & 0xFF00) >> 8);
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*offset += 2;
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#elif defined(WOFF_BIG_ENDIAN)
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*reinterpret_cast<uint16_t*>(dst + *offset) = static_cast<uint16_t>(val);
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*offset += 2;
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#else
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dst[(*offset)++] = val >> 8;
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dst[(*offset)++] = val;
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#endif
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}
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inline void StoreBytes(const uint8_t* data, size_t len,
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size_t* offset, uint8_t* dst) {
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memcpy(&dst[*offset], data, len);
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*offset += len;
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}
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} // namespace woff2
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#endif // WOFF2_STORE_BYTES_H_
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