Method FindOrAddVar

source/script.cpp:7027–7046

Var *Script::FindOrAddVar(LPCTSTR aVarName, size_t aVarNameLength, int aScope)
// Caller has ensured that aVarName isn't NULL.
// Returns the Var whose name matches aVarName.  If it doesn't exist, it is created.
{
	if (!*aVarName)
		return NULL;
	ResultType result = OK; // Must set default.
	VarList *varlist;
	int insert_pos;
	Var *var;
	if (var = FindVar(aVarName, aVarNameLength, aScope, &varlist, &insert_pos, &result))
		return var;
	if (!result) // An error was displayed.
		return nullptr;
	// Otherwise, no match found, so create a new var.
	bool is_local = varlist != GlobalVars();
	// This will return NULL if there was a problem, in which case AddVar() will already have displayed the error:
	return AddVar(aVarName, aVarNameLength, varlist, insert_pos
		, (aScope & ~(VAR_LOCAL | VAR_GLOBAL)) | (is_local ? VAR_LOCAL : VAR_GLOBAL)); // When aScope == FINDVAR_DEFAULT, it contains both the "local" and "global" bits.  This ensures only the appropriate bit is set.
}