private bool ParseConstant(ParseTreeNode node, Block block, out Variable res)
{
res = new Assemble.Variable();
res.AssemblePosition = new Assemble.AssemblePosition(this.ParsingFilePath, node);
res.DefinedBlock = block;
if (node.ChildNodes.Count == 5)
{ //.constant + name + = + content + ;
//Name
res.Name = node.ChildNodes[1].ChildNodes[0].Token.Text;
//Content
ValueBase initialValue;
if (!ParseImmediateValue(node.ChildNodes[3].ChildNodes[0], block, out initialValue))
{
return(false);
}
res.InitialValues = new ValueBase[1] {
initialValue
};
//Mark attribute
res.IsConstant = true;
}
else if (node.ChildNodes.Count == 10)
{ //.constant + name + [ + number + ] + = + { + contents + } + ;
//Name
res.Name = node.ChildNodes[1].ChildNodes[0].Token.Text;
//Content
List <ValueBase> initialValues;
if (!ParseConstantInitialValues(node.ChildNodes[7], block, out initialValues))
{
return(false);
}
//Fill by zero
int length = (int)node.ChildNodes[3].Token.Value;
if (length <= 0)
{
ReportError("Constant", "Constant array length is invalid.", node.ChildNodes[3]);
return(false);
}
if (length < initialValues.Count)
{
ReportError("Constant", "Constant array length is too small for its initial values.", node.ChildNodes[3]);
return(false);
}
while (initialValues.Count < length)
{
initialValues.Add(ValueBase.Zero);
}
res.InitialValues = initialValues.ToArray();
//Mark attribute
res.IsConstant = true;
}
return(true);
}
public Variable Clone(Block parentBlock)
{
Variable res = new Assemble.Variable()
{
AssemblePosition = this.AssemblePosition,
Name = this.Name,
PositionHint = this.PositionHint,
DefinedBlock = parentBlock,
IsConstant = this.IsConstant,
IsNeedInitialization = this.IsNeedInitialization,
};
//InitialValues
res.InitialValues = new ValueBase[this.InitialValues.Length];
for (int i = 0; i < res.InitialValues.Length; i++)
{
res.InitialValues[i] = this.InitialValues[i].Clone(parentBlock);
}
return(res);
}
private bool ParseVariable(ParseTreeNode node, Block block, out Variable res)
{
res = new Assemble.Variable();
res.AssemblePosition = new Assemble.AssemblePosition(this.ParsingFilePath, node);
res.DefinedBlock = block;
if (node.ChildNodes.Count == 3 || node.ChildNodes.Count == 4)
{ //.variable + name + [variabledefPositionHint] + ;
//Name
res.Name = node.ChildNodes[1].ChildNodes[0].Token.Text;
//No content
res.InitialValues = new ValueBase[1] {
ValueBase.Zero
};
//PositionHint
if (node.ChildNodes.Count == 4)
{
res.PositionHint = (int)(node.ChildNodes[2].ChildNodes[2].Token.Value);
}
//Mark attribute
res.IsConstant = false;
res.IsNeedInitialization = false;
}
else if (node.ChildNodes.Count == 5 || node.ChildNodes.Count == 6)
{ //.variable + name + [variabledefPositionHint] + = + content + ;
//Name
res.Name = node.ChildNodes[1].ChildNodes[0].Token.Text;
//PositionHint
if (node.ChildNodes.Count == 6)
{
res.PositionHint = (int)(node.ChildNodes[2].ChildNodes[2].Token.Value);
}
//Content
ParseTreeNode contentNode = node.ChildNodes[node.ChildNodes.Count - 2];
ValueBase initialValue;
if (!ParseImmediateValue(contentNode.ChildNodes[0], block, out initialValue))
{
return(false);
}
res.InitialValues = new ValueBase[1] {
initialValue
};
//Mark attribute
res.IsConstant = false;
res.IsNeedInitialization = true;
}
else if (node.ChildNodes.Count == 10 || node.ChildNodes.Count == 11)
{ //.variable + name + [ + number + ] + [variabledefPositionHint] + = + { + contents + } + ;
//Name
res.Name = node.ChildNodes[1].ChildNodes[0].Token.Text;
//PositionHint
if (node.ChildNodes.Count == 11)
{
res.PositionHint = (int)(node.ChildNodes[5].ChildNodes[2].Token.Value);
}
//Content
ParseTreeNode contentNode = node.ChildNodes[node.ChildNodes.Count - 3];
List <ValueBase> initialValues;
if (!ParseVariableInitialValues(contentNode, block, out initialValues))
{
return(false);
}
//Fill by zero
int length = (int)node.ChildNodes[3].Token.Value;
if (length <= 0)
{
ReportError("Variable", "Variable array length is invalid.", node.ChildNodes[3]);
return(false);
}
if (length < initialValues.Count)
{
ReportError("Variable", "Variable array length is too small for its initial values.", node.ChildNodes[3]);
return(false);
}
while (initialValues.Count < length)
{
initialValues.Add(ValueBase.Zero);
}
res.InitialValues = initialValues.ToArray();
//Mark attribute
res.IsConstant = false;
res.IsNeedInitialization = true; //配列に対するインデックスアクセス方法を提供しないので，要素が最適化されてもかまわない一時変数のために配列を使うことはないだろう
}
return(true);
}
