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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>
#if _MSC_VER < 1400
static HINSTANCE hCrt = NULL;
typedef int ( __cdecl *_vscprintf_func )( LPCSTR pszFormat, va_list args );
static _vscprintf_func _vscprintf_ptr = NULL;
typedef int ( __cdecl *_vscwprintf_func )( LPCWSTR pszFormat, va_list args );
static _vscwprintf_func _vscwprintf_ptr = NULL;
typedef int ( __cdecl *_vsnprintf_func )( char*, size_t, const char*, va_list );
static _vsnprintf_func _vsnprintf_ptr = NULL;
typedef int ( __cdecl *_vsnwprintf_func )( wchar_t *, size_t, const wchar_t *, va_list );
static _vsnwprintf_func _vsnwprintf_ptr = NULL;
typedef int ( __cdecl *vswprintf_func )( wchar_t *, size_t, const wchar_t *, va_list );
static vswprintf_func vswprintf_ptr = NULL;
typedef int ( __cdecl *vsprintf_func )( char*, size_t, const char*, va_list );
static vsprintf_func vsprintf_ptr = NULL;
static void checkCrt( void )
{
if ( hCrt == NULL ) {
hCrt = GetModuleHandleA( "msvcrt.dll" );
_vscprintf_ptr = (_vscprintf_func)GetProcAddress( hCrt, "_vscprintf" );
_vscwprintf_ptr = (_vscwprintf_func)GetProcAddress( hCrt, "_vscwprintf" );
_vsnprintf_ptr = (_vsnprintf_func)GetProcAddress( hCrt, "_vsnprintf" );
_vsnwprintf_ptr = (_vsnwprintf_func)GetProcAddress( hCrt, "_vsnwprintf" );
vswprintf_ptr = (vswprintf_func)GetProcAddress( hCrt, "vswprintf" );
vsprintf_ptr = (vsprintf_func)GetProcAddress( hCrt, "vsprintf" );
} }
#endif
int __stdcall ChTraitsCRT<wchar_t>::GetFormattedLength( LPCWSTR pszFormat, va_list args )
{
#if _MSC_VER < 1400
checkCrt();
if ( _vscwprintf_ptr != NULL )
return _vscwprintf_ptr( pszFormat, args );
WCHAR buf[ 4000 ];
return vswprintf_ptr( buf, SIZEOF(buf), pszFormat, args );
#else
return _vscwprintf( pszFormat, args );
#endif
}
int __stdcall ChTraitsCRT<wchar_t>::Format( LPWSTR pszBuffer, size_t nLength, LPCWSTR pszFormat, va_list args)
{
#if _MSC_VER < 1400
checkCrt();
if ( _vsnwprintf_ptr != NULL )
return _vsnwprintf_ptr( pszBuffer, nLength, pszFormat, args );
return vswprintf_ptr( pszBuffer, nLength, pszFormat, args );
#else
return _vsnwprintf( pszBuffer, nLength, pszFormat, args );
#endif
}
/////////////////////////////////////////////////////////////////////////////////////////
// ChTraitsCRT<char>
int __stdcall ChTraitsCRT<char>::GetFormattedLength( LPCSTR pszFormat, va_list args )
{
#if _MSC_VER < 1400
checkCrt();
if ( _vscprintf_ptr != NULL )
return _vscprintf_ptr( pszFormat, args );
char buf[4000];
return vsprintf_ptr( buf, sizeof(buf), pszFormat, args );
#else
return _vscprintf( pszFormat, args );
#endif
}
int __stdcall ChTraitsCRT<char>::Format( LPSTR pszBuffer, size_t nlength, LPCSTR pszFormat, va_list args )
{
#if _MSC_VER < 1400
checkCrt();
return _vsnprintf( pszBuffer, nlength, pszFormat, args );
#else
return vsprintf_s( pszBuffer, nlength, pszFormat, args );
#endif
}
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