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jeanlemotan
2024-07-02 18:10:39 +02:00
commit 48ab06b1d9
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test/packages/EAStdC/source/EAHashString.cpp
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///////////////////////////////////////////////////////////////////////////////
// Copyright (c) Electronic Arts Inc. All rights reserved.
///////////////////////////////////////////////////////////////////////////////
#include <EAStdC/internal/Config.h>
#include <EAStdC/EAHashString.h>
#include <EAStdC/EACType.h>
namespace EA
{
namespace StdC
{
///////////////////////////////////////////////////////////////////////////////
// DJB2
//
// This function is deprecated, as FNV1 has been shown to be superior.
///////////////////////////////////////////////////////////////////////////////
EASTDC_API uint32_t DJB2(const void* pData, size_t nLength, uint32_t nInitialValue)
{
const uint8_t* pData8 = (const uint8_t*)pData;
const uint8_t* const pData8End = pData8 + nLength;
while(pData8 < pData8End)
nInitialValue = ((nInitialValue << 5) + nInitialValue) + *pData8++;
return nInitialValue;
}
EASTDC_API uint32_t DJB2_String8(const char* pData8, uint32_t nInitialValue, CharCase charCase)
{
uint32_t c;
switch (charCase)
{
case kCharCaseAny:
{
while((c = (uint8_t)*pData8++) != 0)
nInitialValue = ((nInitialValue << 5) + nInitialValue) + c;
break;
}
case kCharCaseLower:
{
while((c = (uint8_t)*pData8++) != 0)
nInitialValue = ((nInitialValue << 5) + nInitialValue) + Tolower((char)c);
break;
}
case kCharCaseUpper:
{
while((c = (uint8_t)*pData8++) != 0)
nInitialValue = ((nInitialValue << 5) + nInitialValue) + Toupper((char)c);
break;
}
}
return nInitialValue;
}
EASTDC_API uint32_t DJB2_String16(const char16_t* pData16, uint32_t nInitialValue, CharCase charCase)
{
uint32_t c;
switch (charCase)
{
case kCharCaseAny:
{
while((c = (uint16_t)*pData16++) != 0)
nInitialValue = ((nInitialValue << 5) + nInitialValue) + c;
break;
}
case kCharCaseLower:
{
while((c = (uint16_t)*pData16++) != 0)
nInitialValue = ((nInitialValue << 5) + nInitialValue) + Tolower((char16_t)c);
break;
}
case kCharCaseUpper:
{
while((c = (uint16_t)*pData16++) != 0)
nInitialValue = ((nInitialValue << 5) + nInitialValue) + Toupper((char16_t)c);
break;
}
}
return nInitialValue;
}
///////////////////////////////////////////////////////////////////////////////
// FNV1
///////////////////////////////////////////////////////////////////////////////
EASTDC_API uint32_t FNV1(const void* pData, size_t nLength, uint32_t nInitialValue)
{
const uint8_t* pData8 = (const uint8_t*)pData;
const uint8_t* const pData8End = pData8 + nLength;
while(pData8 < pData8End)
nInitialValue = (nInitialValue * 16777619) ^ *pData8++;
return nInitialValue;
}
EASTDC_API uint32_t FNV1_String8(const char* pData8, uint32_t nInitialValue, CharCase charCase)
{
uint32_t c;
switch (charCase)
{
case kCharCaseAny:
{
while((c = (uint8_t)*pData8++) != 0)
nInitialValue = (nInitialValue * 16777619) ^ c;
break;
}
case kCharCaseLower:
{
while((c = (uint8_t)*pData8++) != 0)
nInitialValue = (nInitialValue * 16777619) ^ Tolower((char)c);
break;
}
case kCharCaseUpper:
{
while((c = (uint8_t)*pData8++) != 0)
nInitialValue = (nInitialValue * 16777619) ^ Toupper((char)c);
break;
}
}
return nInitialValue;
}
EASTDC_API uint32_t FNV1_String16(const char16_t* pData16, uint32_t nInitialValue, CharCase charCase)
{
uint32_t c;
switch (charCase)
{
case kCharCaseAny:
{
while((c = (uint16_t)*pData16++) != 0)
nInitialValue = (nInitialValue * 16777619) ^ c;
break;
}
case kCharCaseLower:
{
while((c = (uint16_t)*pData16++) != 0)
nInitialValue = (nInitialValue * 16777619) ^ Tolower((char16_t)c);
break;
}
case kCharCaseUpper:
{
while((c = (uint16_t)*pData16++) != 0)
nInitialValue = (nInitialValue * 16777619) ^ Toupper((char16_t)c);
break;
}
}
return nInitialValue;
}
EASTDC_API uint32_t FNV1_String32(const char32_t* pData32, uint32_t nInitialValue, CharCase charCase)
{
uint32_t c;
switch (charCase)
{
case kCharCaseAny:
{
while((c = (uint32_t)*pData32++) != 0)
nInitialValue = (nInitialValue * 16777619) ^ c;
break;
}
case kCharCaseLower:
{
while((c = (uint32_t)*pData32++) != 0)
nInitialValue = (nInitialValue * 16777619) ^ Tolower((char32_t)c);
break;
}
case kCharCaseUpper:
{
while((c = (uint32_t)*pData32++) != 0)
nInitialValue = (nInitialValue * 16777619) ^ Toupper((char32_t)c);
break;
}
}
return nInitialValue;
}
EASTDC_API uint64_t FNV64(const void* pData, size_t nLength, uint64_t nInitialValue)
{
const uint8_t* pData8 = (const uint8_t*)pData;
const uint8_t* const pData8End = pData8 + nLength;
while(pData8 < pData8End)
nInitialValue = (nInitialValue * UINT64_C(1099511628211)) ^ *pData8++;
return nInitialValue;
}
EASTDC_API uint64_t FNV64_String8(const char* pData8, uint64_t nInitialValue, CharCase charCase)
{
uint64_t c;
switch (charCase)
{
case kCharCaseAny:
{
while((c = (uint8_t)*pData8++) != 0)
nInitialValue = (nInitialValue * UINT64_C(1099511628211)) ^ c;
break;
}
case kCharCaseLower:
{
while((c = (uint8_t)*pData8++) != 0)
nInitialValue = (nInitialValue * UINT64_C(1099511628211)) ^ Tolower((char)c);
break;
}
case kCharCaseUpper:
{
while((c = (uint8_t)*pData8++) != 0)
nInitialValue = (nInitialValue * UINT64_C(1099511628211)) ^ Toupper((char)c);
break;
}
}
return nInitialValue;
}
EASTDC_API uint64_t FNV64_String16(const char16_t* pData16, uint64_t nInitialValue, CharCase charCase)
{
uint64_t c;
switch (charCase)
{
case kCharCaseAny:
{
while((c = (uint16_t)*pData16++) != 0)
nInitialValue = (nInitialValue * UINT64_C(1099511628211)) ^ c;
break;
}
case kCharCaseLower:
{
while((c = (uint16_t)*pData16++) != 0)
nInitialValue = (nInitialValue * UINT64_C(1099511628211)) ^ Tolower((char16_t)c);
break;
}
case kCharCaseUpper:
{
while((c = (uint16_t)*pData16++) != 0)
nInitialValue = (nInitialValue * UINT64_C(1099511628211)) ^ Toupper((char16_t)c);
break;
}
}
return nInitialValue;
}
EASTDC_API uint64_t FNV64_String32(const char32_t* pData32, uint64_t nInitialValue, CharCase charCase)
{
uint64_t c;
switch (charCase)
{
case kCharCaseAny:
{
while((c = (uint32_t)*pData32++) != 0)
nInitialValue = (nInitialValue * UINT64_C(1099511628211)) ^ c;
break;
}
case kCharCaseLower:
{
while((c = (uint32_t)*pData32++) != 0)
nInitialValue = (nInitialValue * UINT64_C(1099511628211)) ^ Tolower((char32_t)c);
break;
}
case kCharCaseUpper:
{
while((c = (uint32_t)*pData32++) != 0)
nInitialValue = (nInitialValue * UINT64_C(1099511628211)) ^ Toupper((char32_t)c);
break;
}
}
return nInitialValue;
}
} // namespace StdC
} // namespace EA