ClearScript/ClearScriptV8/StdString.cpp at master · SoniSoft-IO/ClearScript · GitHub

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// Licensed under the MIT license.

#include "ClearScriptV8Native.h"

//-----------------------------------------------------------------------------

// StdString implementation

//-----------------------------------------------------------------------------

size_t StdString::GetDigest() const

{

return (sizeof(size_t) == 4) ? static_cast<size_t>(GetDigestAsUInt32()) : static_cast<size_t>(GetDigestAsUInt64());

}

//-----------------------------------------------------------------------------

uint32_t StdString::GetDigestAsUInt32() const

{

uint32_t digest { 2166136261UL };

const uint32_t prime { 16777619UL };

auto pBytes = reinterpret_cast<const uint8_t*>(m_Value.data());

size_t length { m_Value.length() * sizeof(StdChar) };

for (size_t index = 0; index < length; index++)

{

digest ^= pBytes[index];

digest *= prime;

}

return digest;

}

//-----------------------------------------------------------------------------

uint64_t StdString::GetDigestAsUInt64() const

{

uint64_t digest { 14695981039346656037ULL };

const uint64_t prime { 1099511628211ULL };

auto pBytes = reinterpret_cast<const uint8_t*>(m_Value.data());

size_t length { m_Value.length() * sizeof(StdChar) };

for (size_t index = 0; index < length; index++)

{

digest ^= pBytes[index];

digest *= prime;

}

return digest;

}

//-----------------------------------------------------------------------------

StdString::Value StdString::GetValue(const v8_inspector::StringView& stringView)

{

auto length = stringView.length();

if (length < 1)

{

return Value();

}

if (!stringView.is8Bit())

{

return Value(reinterpret_cast<const StdChar*>(stringView.characters16()), length);

}

auto pFirst = reinterpret_cast<const char*>(stringView.characters8());

return UTF8Converter().from_bytes(pFirst, pFirst + length);

}

ClearScript/ClearScriptV8/StdString.cpp at master · SoniSoft-IO/ClearScript · GitHub

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