/// <summary>
/// Reset the <see cref="T:DotNetAsm.RepetitionHandler"/>. All processed lines will be cleared.
/// </summary>
public void Reset()
{
_processedLines.Clear();
_rootBlock.Entries.Clear();
_rootBlock.RepeatAmounts = 0;
_currBlock = _rootBlock;
}
/// <summary>
/// Processes the <see cref="T:DotNetAsm.SourceLine"/> for repetitions, or within a repetition block.
/// </summary>
/// <param name="line">The <see cref="T:DotNetAsm.SourceLine"/> to process</param>
public void Process(SourceLine line)
{
if (line.Instruction.Equals(".repeat", Controller.Options.StringComparison))
{
if (string.IsNullOrEmpty(line.Operand))
{
Controller.Log.LogEntry(line, ErrorStrings.TooFewArguments, line.Instruction);
return;
}
if (string.IsNullOrEmpty(line.Label) == false)
{
Controller.Log.LogEntry(line, ErrorStrings.None);
return;
}
if (_levels > 0)
{
var block = new RepetitionBlock
{
BackLink = _currBlock
};
var entry = new RepetitionBlock.RepetitionEntry(null, block);
_currBlock.Entries.Add(entry);
_currBlock = block;
}
_levels++;
_currBlock.RepeatAmounts = Controller.Evaluator.Eval(line.Operand, int.MinValue, uint.MaxValue);
}
else if (line.Instruction.Equals(".endrepeat", Controller.Options.StringComparison))
{
if (_levels == 0)
{
Controller.Log.LogEntry(line, ErrorStrings.ClosureDoesNotCloseBlock, line.Instruction);
}
else if (string.IsNullOrEmpty(line.Operand) == false)
{
Controller.Log.LogEntry(line, ErrorStrings.TooManyArguments, line.Instruction);
}
else if (string.IsNullOrEmpty(line.Label) == false)
{
Controller.Log.LogEntry(line, ErrorStrings.None);
}
else
{
_levels--;
_currBlock = _currBlock.BackLink;
if (_levels == 0)
{
ProcessLines(_rootBlock);
}
}
}
else
{
var entry = new RepetitionBlock.RepetitionEntry(line, null);
_currBlock.Entries.Add(entry);
}
}
/// <summary>
/// Constructs an instance of a <see cref="T:DotNetAsm.RepetitionHandler"/> object.
/// </summary>
public RepetitionHandler()
{
Reserved.DefineType("Directives", ".repeat", ".endrepeat");
_currBlock =
_rootBlock = new RepetitionBlock();
_levels = 0;
_processedLines = new List <SourceLine>();
}
/// <summary>
/// Constructs a <see cref="T:DotNetAsm.RepetitionHandler.RepetitionBlock.RepetitionEntry"/>.
/// </summary>
/// <param name="line">The <see cref="T:DotNetAsm.SourceLine "/> to add. This value can
/// be null.</param>
/// <param name="block">The <see cref="T:DotNetAsm.RepetitionHandler.RepetitionBlock"/>
/// to link to. This value can be null.</param>
public RepetitionEntry(SourceLine line, RepetitionBlock block)
{
if (line != null)
{
Line = line.Clone() as SourceLine;
}
else
{
Line = null;
}
LinkedBlock = block;
}
/// <summary>
/// Perform final processing on the processed lines of the <see cref="T:DotNetAsm.RepetitionHandler"/>.
/// </summary>
/// <param name="block">The <see cref="T:DotNetAsm.RepetitionHandler.RepetitionBlock"/> to process</param>
void ProcessLines(RepetitionBlock block)
{
for (int i = 0; i < block.RepeatAmounts; i++)
{
foreach (var entry in block.Entries)
{
if (entry.LinkedBlock != null)
{
ProcessLines(entry.LinkedBlock);
}
else
{
_processedLines.Add(entry.Line.Clone() as SourceLine);
}
}
}
}
