Updated the Instruction's structure and updated the Parser accordingly.
This commit is contained in:
+67
-18
@@ -32,7 +32,6 @@ IRState* ParseTokens(List* tokens) {
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switch(t->Class) {
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case DirectiveClass: //Maybe these should be ignored, let another process handle that.
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IgnoreParserLine();
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AdvanceParser();
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break;
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case MnemonicClass:
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HandleOperation();
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@@ -46,7 +45,6 @@ IRState* ParseTokens(List* tokens) {
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fprintf(stderr, "[Warning] Line %d: Syntax error, expected start of expression, got '%c' [%d].\n", t->LineNumber, t->Value.Punctuation, t->Class);
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//exit(1);
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IgnoreParserLine();
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AdvanceParser(); //Consume the new line
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break;
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}
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}
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@@ -66,22 +64,35 @@ IRState* ParseTokens(List* tokens) {
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return &MachineState;
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}
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OpcodeParameter GetParameterType(Token** sourceToken) {
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Parameter* GetParameterType() {
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Token* token = PeekToken();
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OpcodeParameter parameterType;
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Symbol* symbol = NULL;
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Parameter* param = CreateParameter(NoParameter);
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switch(token->Class) {
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case RegisterClass:
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*sourceToken = token;
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param->ParameterType = RegisterParameter;
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param->InterpretedAs = RegisterParameter;
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param->Value.Register = token->Value.Register;
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AdvanceParser();
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return RegisterParameter;
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return param;
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case LabelClass:
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case IdentifierClass:
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*sourceToken = token;
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param->ParameterType = AddressParameter;
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param->InterpretedAs = AddressParameter;
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symbol = TryGetSymbol(token->Lemexe, MachineState.SymbolsTable);
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if (!symbol) symbol = AddSymbolToTable(token->Lemexe, token->Lemexe, strlen(token->Lemexe), MachineState.SymbolsTable);
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param->Value.Symbol = symbol;
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AdvanceParser();
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return AddressParameter;
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return param;
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case PunctuationClass:
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if (token->Value.Punctuation != LBracket) {
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fprintf(stderr, "[Error] Line %d: Expected opening bracket\n", token->LineNumber);
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@@ -90,7 +101,37 @@ OpcodeParameter GetParameterType(Token** sourceToken) {
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AdvanceParser(); // [
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parameterType = GetParameterType(sourceToken);
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token = PeekToken();
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if (token->Class == NumberClass) {
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param->ParameterType = ConstantParameter;
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param->InterpretedAs = AddressParameter;
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param->Value.Number = token->Value.Number;
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}
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else if (token->Class == RegisterClass) {
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param->ParameterType = RegisterParameter;
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param->InterpretedAs = AddressParameter;
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param->Value.Register = token->Value.Register;
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}
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else if (token->Class & AddressClass) {
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param->ParameterType = AddressParameter;
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param->ParameterType = AddressParameter;
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symbol = TryGetSymbol(token->Lemexe, MachineState.SymbolsTable);
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if (!symbol) symbol = AddSymbolToTable(token->Lemexe, NULL, strlen(token->Lemexe), MachineState.SymbolsTable);
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param->Value.Symbol = symbol;
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}
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else {
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fprintf(stderr, "[Error] Line %d: Expected identifier, constant number or register.\n", token->LineNumber);
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IgnoreParserLine();
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AdvanceParser(); //Consume NewLine
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//return NULL;
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exit(1);
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}
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AdvanceParser(); //Consume the parameter it self.
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token = PeekToken();
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@@ -101,18 +142,21 @@ OpcodeParameter GetParameterType(Token** sourceToken) {
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AdvanceParser(); // ]
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return AddressParameter;
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return param;
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case NumberClass:
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*sourceToken = token;
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param->ParameterType = ConstantParameter;
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param->InterpretedAs = ConstantParameter;
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param->Value.Number = token->Value.Number;
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AdvanceParser();
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return ConstantParameter;
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return param;
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default:
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break;
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}
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return NoParameter;
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return param;
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}
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void HandleOperation() {
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@@ -130,9 +174,10 @@ void HandleOperation() {
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goto InsertInstruction;
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}
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ins->ParameterOneType = GetParameterType(&token);
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//ins->ParameterOne->ParameterType = GetParameterType(&token);
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ins->ParameterOne = GetParameterType();
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if (ins->ParameterOneType == NoParameter) {
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if (ins->ParameterOne->ParameterType == NoParameter) {
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//This would be an error if the next token isn't a line break.
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if (PeekToken()->Class != PunctuationClass || PeekToken()->Value.Punctuation != NewLine) {
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fprintf(stderr, "[Error] Line %d: Syntax error, expected line break but got %s.\n", token->LineNumber, token->Lemexe);
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@@ -143,7 +188,7 @@ void HandleOperation() {
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}
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if (PeekToken()->Class == PunctuationClass && PeekToken()->Value.Punctuation == NewLine) {
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goto InsertInstruction;
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goto InsertInstruction;
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}
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if (PeekToken()->Class != PunctuationClass || PeekToken()->Value.Punctuation != Comma) {
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@@ -154,7 +199,8 @@ void HandleOperation() {
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AdvanceParser(); //Consume the comma
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ins->ParameterTwoType = GetParameterType(&token);
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//ins->ParameterTwo->ParameterType = GetParameterType(&token);
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ins->ParameterTwo = GetParameterType();
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InsertInstruction:
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@@ -212,7 +258,10 @@ Token* PeekToken(void) {
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void IgnoreParserLine(void) {
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while(!ParserAtEnd()) {
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if (PeekToken()->Class == PunctuationClass && PeekToken()->Value.Punctuation == NewLine) break;
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if (PeekToken()->Class == PunctuationClass && PeekToken()->Value.Punctuation == NewLine) {
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AdvanceParser();
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break;
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}
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if (PeekToken()->EndOfFile) break;
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