Esempi in C++ (Cpp) per VMemoryBuffer::GetDataSize

Esempio n. 1

File: XWinProcessLauncher.cpp Progetto: sanyaade-iot/core-XToolbox

// Environment block == null-terminated block of null-terminated strings of the form: name=value\0
wchar_t * XWinProcessLauncher::_CreateEnvironmentVariablesBlock(const EnvVarNamesAndValuesMap &inVarToUse)
{
	wchar_t *		initialEnvStrings	= NULL;
	VMemoryBuffer<>	allStrings;
	wchar_t *		theEnvVarBlock		= NULL;

	// Initial environment variables

	initialEnvStrings = ::GetEnvironmentStringsW();
	if(initialEnvStrings != NULL)
	{
		wchar_t	*currentStr = initialEnvStrings;
		size_t	fullStrSize;

		while (*currentStr)
		{
			fullStrSize = ::wcslen(currentStr) + 1;
			allStrings.PutData(allStrings.GetDataSize(), currentStr, fullStrSize * sizeof(wchar_t));
			currentStr += fullStrSize;
		}
	}

	// Prepare our envir. variables
	if(!inVarToUse.empty())
	{
		XBOX::VString							oneEnvVarAndValue;
		EnvVarNamesAndValuesMap::const_iterator	envVarIterator;

		// Calculate final buffer size (concatenate name=value and add the 0 terminattion)
		 
		for (envVarIterator = inVarToUse.begin(); envVarIterator != inVarToUse.end(); envVarIterator++)
		{
			oneEnvVarAndValue = envVarIterator->first;
			if(!oneEnvVarAndValue.IsEmpty())
			{
				oneEnvVarAndValue += "=";
				oneEnvVarAndValue += envVarIterator->second;

				const wchar_t *	varValueCStr = oneEnvVarAndValue.GetCPointer();	// Null terminated UniCode string.

				if(testAssert(varValueCStr != NULL))
				{
					allStrings.PutData(allStrings.GetDataSize(), varValueCStr, (oneEnvVarAndValue.GetLength() + 1) * sizeof(wchar_t));				
				}
			}						
		}
	} //if(!inVarToUse.empty())

	if(allStrings.GetDataSize() > 0)
	{
		wchar_t	theZero = 0;

		allStrings.PutData(allStrings.GetDataSize(), &theZero, sizeof(wchar_t));

		theEnvVarBlock = new wchar_t[allStrings.GetDataSize()];
		if(testAssert(theEnvVarBlock))
			allStrings.GetData(0, theEnvVarBlock, allStrings.GetDataSize());
	}
	
	if(initialEnvStrings != NULL)
		::FreeEnvironmentStringsW(initialEnvStrings);

	return theEnvVarBlock;
}

Esempio n. 2

File: XWinProcessLauncher.cpp Progetto: sanyaade-webdev/core-XToolbox

// Environment block == null-terminated block of null-terminated strings of the form: name=value\0
char * XWinProcessLauncher::_CreateEnvironmentVariablesBlock(const EnvVarNamesAndValuesMap &inVarToUse)
{
	char	*initialEnvStrings = NULL;
	VMemoryBuffer<>		allStrings;
	char * theEnvVarBlock = NULL;

	// Initial environment variables
	initialEnvStrings = ::GetEnvironmentStrings();
	if(initialEnvStrings != NULL)
	{
		char *currentStr = initialEnvStrings;
		size_t	fullStrSize;
		while(*currentStr)
		{
			fullStrSize = strlen(currentStr) + 1;
			allStrings.PutData(allStrings.GetDataSize(), currentStr, fullStrSize);
			currentStr += fullStrSize;
		}
	}

	// Prepare our envir. variables
	if(!inVarToUse.empty())
	{
		XBOX::VString	oneEnvVarAndValue;
	// Calculate final buffer size (concatenate name=value and add the 0 terminattion)
		EnvVarNamesAndValuesMap::const_iterator	envVarIterator = inVarToUse.begin();
		while(envVarIterator != inVarToUse.end())
		{
			oneEnvVarAndValue = envVarIterator->first;
			if(!oneEnvVarAndValue.IsEmpty())
			{
				oneEnvVarAndValue += "=";
				oneEnvVarAndValue += envVarIterator->second;

				char *varValueCStr = _CreateCString(oneEnvVarAndValue);
				if(testAssert(varValueCStr != NULL))
				{
					allStrings.PutData(allStrings.GetDataSize(), varValueCStr, strlen(varValueCStr) + 1);
					delete [] varValueCStr;
				}
			}			
			++envVarIterator;
		}
	} //if(!inVarToUse.empty())

	if(allStrings.GetDataSize() > 0)
	{
		char	theZero = 0;
		allStrings.PutData(allStrings.GetDataSize(), &theZero, 1);

		theEnvVarBlock = new char[allStrings.GetDataSize()];
		if(testAssert(theEnvVarBlock))
			allStrings.GetData(0, theEnvVarBlock, allStrings.GetDataSize());
	}
	
	if(initialEnvStrings != NULL)
		::FreeEnvironmentStrings(initialEnvStrings);
	
	return theEnvVarBlock;

}