Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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46 lines
1.1 KiB
46 lines
1.1 KiB
// Protocol Buffers - Google's data interchange format |
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// Copyright 2023 Google LLC. All rights reserved. |
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// |
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// Use of this source code is governed by a BSD-style |
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// license that can be found in the LICENSE file or at |
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// https://developers.google.com/open-source/licenses/bsd |
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#ifndef UPB_BASE_INTERNAL_ENDIAN_H_ |
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#define UPB_BASE_INTERNAL_ENDIAN_H_ |
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#include <stdint.h> |
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// Must be last. |
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#include "upb/port/def.inc" |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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UPB_INLINE bool upb_IsLittleEndian(void) { |
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const int x = 1; |
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return *(char*)&x == 1; |
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} |
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UPB_INLINE uint32_t upb_BigEndian32(uint32_t val) { |
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if (upb_IsLittleEndian()) return val; |
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return ((val & 0xff) << 24) | ((val & 0xff00) << 8) | |
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((val & 0xff0000) >> 8) | ((val & 0xff000000) >> 24); |
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} |
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UPB_INLINE uint64_t upb_BigEndian64(uint64_t val) { |
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if (upb_IsLittleEndian()) return val; |
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const uint64_t hi = ((uint64_t)upb_BigEndian32((uint32_t)val)) << 32; |
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const uint64_t lo = upb_BigEndian32((uint32_t)(val >> 32)); |
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return hi | lo; |
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} |
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#ifdef __cplusplus |
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} /* extern "C" */ |
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#endif |
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#include "upb/port/undef.inc" |
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#endif /* UPB_BASE_INTERNAL_ENDIAN_H_ */
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