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[encoding] declare HostSwap() functions as constexpr (#10326)

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This allows their use when defining constant values.
This commit is contained in:
Abtin Keshavarzian
2024-06-03 14:22:04 -07:00
committed by GitHub
parent 8fc67f3104
commit e1918b31c3
1 changed files with 18 additions and 15 deletions
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src/core/common/encoding.hpp
+18 -15
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@@ -49,15 +49,18 @@
namespace ot {
inline uint16_t Swap16(uint16_t v) { return (((v & 0x00ffU) << 8) & 0xff00) | (((v & 0xff00U) >> 8) & 0x00ff); }
inline constexpr uint16_t Swap16(uint16_t v)
{
return (((v & 0x00ffU) << 8) & 0xff00) | (((v & 0xff00U) >> 8) & 0x00ff);
}
inline uint32_t Swap32(uint32_t v)
inline constexpr uint32_t Swap32(uint32_t v)
{
return ((v & static_cast<uint32_t>(0x000000ffUL)) << 24) | ((v & static_cast<uint32_t>(0x0000ff00UL)) << 8) |
((v & static_cast<uint32_t>(0x00ff0000UL)) >> 8) | ((v & static_cast<uint32_t>(0xff000000UL)) >> 24);
}
inline uint64_t Swap64(uint64_t v)
inline uint64_t constexpr Swap64(uint64_t v)
{
return ((v & static_cast<uint64_t>(0x00000000000000ffULL)) << 56) |
((v & static_cast<uint64_t>(0x000000000000ff00ULL)) << 40) |
@@ -84,15 +87,15 @@ namespace BigEndian {
#if BYTE_ORDER_BIG_ENDIAN
inline uint16_t HostSwap16(uint16_t v) { return v; }
inline uint32_t HostSwap32(uint32_t v) { return v; }
inline uint64_t HostSwap64(uint64_t v) { return v; }
inline constexpr uint16_t HostSwap16(uint16_t v) { return v; }
inline constexpr uint32_t HostSwap32(uint32_t v) { return v; }
inline constexpr uint64_t HostSwap64(uint64_t v) { return v; }
#else /* BYTE_ORDER_LITTLE_ENDIAN */
inline uint16_t HostSwap16(uint16_t v) { return Swap16(v); }
inline uint32_t HostSwap32(uint32_t v) { return Swap32(v); }
inline uint64_t HostSwap64(uint64_t v) { return Swap64(v); }
inline constexpr uint16_t HostSwap16(uint16_t v) { return Swap16(v); }
inline constexpr uint32_t HostSwap32(uint32_t v) { return Swap32(v); }
inline constexpr uint64_t HostSwap64(uint64_t v) { return Swap64(v); }
#endif // LITTLE_ENDIAN
@@ -267,15 +270,15 @@ namespace LittleEndian {
#if BYTE_ORDER_BIG_ENDIAN
inline uint16_t HostSwap16(uint16_t v) { return Swap16(v); }
inline uint32_t HostSwap32(uint32_t v) { return Swap32(v); }
inline uint64_t HostSwap64(uint64_t v) { return Swap64(v); }
inline constexpr uint16_t HostSwap16(uint16_t v) { return Swap16(v); }
inline constexpr uint32_t HostSwap32(uint32_t v) { return Swap32(v); }
inline constexpr uint64_t HostSwap64(uint64_t v) { return Swap64(v); }
#else /* BYTE_ORDER_LITTLE_ENDIAN */
inline uint16_t HostSwap16(uint16_t v) { return v; }
inline uint32_t HostSwap32(uint32_t v) { return v; }
inline uint64_t HostSwap64(uint64_t v) { return v; }
inline constexpr uint16_t HostSwap16(uint16_t v) { return v; }
inline constexpr uint32_t HostSwap32(uint32_t v) { return v; }
inline constexpr uint64_t HostSwap64(uint64_t v) { return v; }
#endif