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#include "irc.h"
#include "MString.h"
/////////////////////////////////////////////////////////////////////////////////////////
// CMBaseString
CNilMStringData CMBaseString::m_nil;
CMStringData* CMBaseString::Allocate(int nChars, int nCharSize)
{
CMStringData* pData;
nChars++; // nil char
size_t nDataBytes = nCharSize * nChars;
size_t nTotalSize = nDataBytes + sizeof(CMStringData);
pData = static_cast<CMStringData*>(malloc(nTotalSize));
if (pData == NULL)
return NULL;
pData->nRefs = 1;
pData->nAllocLength = nChars - 1;
pData->nDataLength = 0;
return pData;
}
void CMBaseString::Free(CMStringData* pData)
{
free(pData);
}
CMStringData* CMBaseString::Realloc(CMStringData* pData, int nChars, int nCharSize)
{
CMStringData* pNewData;
nChars++; // nil char
ULONG nDataBytes = nCharSize * nChars;
ULONG nTotalSize = nDataBytes + sizeof(CMStringData);
pNewData = static_cast<CMStringData*>(realloc(pData, nTotalSize));
if (pNewData == NULL)
return NULL;
pNewData->nAllocLength = nChars - 1;
return pNewData;
}
CMStringData* CMBaseString::GetNilString()
{
m_nil.AddRef();
return &m_nil;
}
/////////////////////////////////////////////////////////////////////////////////////////
// CMStringData
void* CMStringData::data()
{
return (this + 1);
}
void CMStringData::AddRef()
{
InterlockedIncrement(&nRefs);
}
bool CMStringData::IsLocked() const
{
return nRefs < 0;
}
bool CMStringData::IsShared() const
{
return (nRefs > 1);
}
void CMStringData::Lock()
{
nRefs--; // Locked buffers can't be shared, so no interlocked operation necessary
if (nRefs == 0)
nRefs = -1;
}
void CMStringData::Release()
{
if (InterlockedDecrement(&nRefs) <= 0)
CMBaseString::Free(this);
}
void CMStringData::Unlock()
{
if (IsLocked())
{
nRefs++; // Locked buffers can't be shared, so no interlocked operation necessary
if (nRefs == 0)
nRefs = 1;
}
}
CNilMStringData::CNilMStringData()
{
nRefs = 2; // Never gets freed
nDataLength = 0;
nAllocLength = 0;
achNil[0] = 0;
achNil[1] = 0;
}
/////////////////////////////////////////////////////////////////////////////////////////
// ChTraitsCRT<wchar_t>
int __stdcall ChTraitsCRT<wchar_t>::GetFormattedLength( LPCWSTR pszFormat, va_list args )
{
return _vscwprintf(pszFormat, args);
}
int __stdcall ChTraitsCRT<wchar_t>::Format( LPWSTR pszBuffer, size_t nLength, LPCWSTR pszFormat, va_list args)
{
return _vsnwprintf(pszBuffer, nLength, pszFormat, args);
}
/////////////////////////////////////////////////////////////////////////////////////////
// ChTraitsCRT<char>
int __stdcall ChTraitsCRT<char>::GetFormattedLength( LPCSTR pszFormat, va_list args )
{
return _vscprintf(pszFormat, args);
}
int __stdcall ChTraitsCRT<char>::Format( LPSTR pszBuffer, size_t nlength, LPCSTR pszFormat, va_list args )
{
return vsprintf_s(pszBuffer, nlength, pszFormat, args);
}
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