private void ProcessInstruction(string instructionLine) {
int dummy;
if (instructionLine.StartsWith("#define ")) {
string variableName = ParseInstructionVariable(instructionLine, 8, out dummy);
if (variableName == null) {
RaiseError("Missing variable following the '#define' instruction.");
}
if (_definedVariables.ContainsKey(variableName)) {
RaiseError("Duplicate definition of variable '" + variableName + "'.");
}
_definedVariables[variableName] = String.Empty;
}
else if (instructionLine.StartsWith("#undefine ")) {
string variableName = ParseInstructionVariable(instructionLine, 10, out dummy);
if (variableName == null) {
RaiseError("Missing variable following the '#undefine' instruction.");
}
if (_definedVariables.ContainsKey(variableName) == false) {
RaiseError("The variable '" + variableName + "' has not been defined yet.");
}
_definedVariables.Remove(variableName);
}
else if (instructionLine.StartsWith("#if ")) {
string variableName = ParseInstructionVariable(instructionLine, 4, out dummy);
if (variableName == null) {
RaiseError("Missing variable following the '#if' instruction.");
}
Instruction instruction = new Instruction();
_activeInstructions.Push(instruction);
instruction.AddVariable(variableName, _definedVariables);
}
else if (instructionLine.StartsWith("#elseif ") ||
instructionLine.StartsWith("#elif ")) {
string variableName = ParseInstructionVariable(instructionLine, 8, out dummy);
if (variableName == null) {
RaiseError("Missing variable following the '#elif' instruction.");
}
if (_activeInstructions.Count == 0) {
RaiseError("Unexpected '#elif' instruction.");
}
Instruction currentInstruction = _activeInstructions.Peek();
bool added = currentInstruction.AddVariable(variableName, _definedVariables);
if (added == false) {
RaiseError("The specified '" + variableName + "' has already been used, or an '#else' instruction has already been specified.");
}
}
else if (instructionLine.StartsWith("#else")) {
if (_activeInstructions.Count == 0) {
RaiseError("Unexpected '#else' instruction.");
}
Instruction currentInstruction = _activeInstructions.Peek();
bool added = currentInstruction.AddVariable(null, _definedVariables);
if (added == false) {
RaiseError("Only a single '#else' instruction is allowed for a given '#if' instruction.");
}
}
else if (instructionLine.StartsWith("#endif")) {
if (_activeInstructions.Count == 0) {
RaiseError("Unexpected '#endif' instruction.");
}
_activeInstructions.Pop();
}
}
private void ProcessInstruction(string instructionLine)
{
int dummy;
if (instructionLine.StartsWith("#define "))
{
string variableName = ParseInstructionVariable(instructionLine, 8, out dummy);
if (variableName == null)
{
RaiseError("Missing variable following the '#define' instruction.");
}
if (_definedVariables.ContainsKey(variableName))
{
RaiseError("Duplicate definition of variable '" + variableName + "'.");
}
_definedVariables[variableName] = String.Empty;
}
else if (instructionLine.StartsWith("#undefine "))
{
string variableName = ParseInstructionVariable(instructionLine, 10, out dummy);
if (variableName == null)
{
RaiseError("Missing variable following the '#undefine' instruction.");
}
if (_definedVariables.ContainsKey(variableName) == false)
{
RaiseError("The variable '" + variableName + "' has not been defined yet.");
}
_definedVariables.Remove(variableName);
}
else if (instructionLine.StartsWith("#if "))
{
string variableName = ParseInstructionVariable(instructionLine, 4, out dummy);
if (variableName == null)
{
RaiseError("Missing variable following the '#if' instruction.");
}
Instruction instruction = new Instruction();
_activeInstructions.Push(instruction);
instruction.AddVariable(variableName, _definedVariables);
}
else if (instructionLine.StartsWith("#elseif ") ||
instructionLine.StartsWith("#elif "))
{
string variableName = ParseInstructionVariable(instructionLine, 8, out dummy);
if (variableName == null)
{
RaiseError("Missing variable following the '#elif' instruction.");
}
if (_activeInstructions.Count == 0)
{
RaiseError("Unexpected '#elif' instruction.");
}
Instruction currentInstruction = _activeInstructions.Peek();
bool added = currentInstruction.AddVariable(variableName, _definedVariables);
if (added == false)
{
RaiseError("The specified '" + variableName + "' has already been used, or an '#else' instruction has already been specified.");
}
}
else if (instructionLine.StartsWith("#else"))
{
if (_activeInstructions.Count == 0)
{
RaiseError("Unexpected '#else' instruction.");
}
Instruction currentInstruction = _activeInstructions.Peek();
bool added = currentInstruction.AddVariable(null, _definedVariables);
if (added == false)
{
RaiseError("Only a single '#else' instruction is allowed for a given '#if' instruction.");
}
}
else if (instructionLine.StartsWith("#endif"))
{
if (_activeInstructions.Count == 0)
{
RaiseError("Unexpected '#endif' instruction.");
}
_activeInstructions.Pop();
}
}