Updated the Instruction's structure and updated the Parser accordingly.

This commit is contained in:
2022-10-04 20:37:47 +00:00
parent 1f7989533b
commit 33309a2759
3 changed files with 97 additions and 36 deletions
+67 -18
View File
@@ -32,7 +32,6 @@ IRState* ParseTokens(List* tokens) {
switch(t->Class) {
case DirectiveClass: //Maybe these should be ignored, let another process handle that.
IgnoreParserLine();
AdvanceParser();
break;
case MnemonicClass:
HandleOperation();
@@ -46,7 +45,6 @@ IRState* ParseTokens(List* tokens) {
fprintf(stderr, "[Warning] Line %d: Syntax error, expected start of expression, got '%c' [%d].\n", t->LineNumber, t->Value.Punctuation, t->Class);
//exit(1);
IgnoreParserLine();
AdvanceParser(); //Consume the new line
break;
}
}
@@ -66,22 +64,35 @@ IRState* ParseTokens(List* tokens) {
return &MachineState;
}
OpcodeParameter GetParameterType(Token** sourceToken) {
Parameter* GetParameterType() {
Token* token = PeekToken();
OpcodeParameter parameterType;
Symbol* symbol = NULL;
Parameter* param = CreateParameter(NoParameter);
switch(token->Class) {
case RegisterClass:
*sourceToken = token;
param->ParameterType = RegisterParameter;
param->InterpretedAs = RegisterParameter;
param->Value.Register = token->Value.Register;
AdvanceParser();
return RegisterParameter;
return param;
case LabelClass:
case IdentifierClass:
*sourceToken = token;
param->ParameterType = AddressParameter;
param->InterpretedAs = AddressParameter;
symbol = TryGetSymbol(token->Lemexe, MachineState.SymbolsTable);
if (!symbol) symbol = AddSymbolToTable(token->Lemexe, token->Lemexe, strlen(token->Lemexe), MachineState.SymbolsTable);
param->Value.Symbol = symbol;
AdvanceParser();
return AddressParameter;
return param;
case PunctuationClass:
if (token->Value.Punctuation != LBracket) {
fprintf(stderr, "[Error] Line %d: Expected opening bracket\n", token->LineNumber);
@@ -90,7 +101,37 @@ OpcodeParameter GetParameterType(Token** sourceToken) {
AdvanceParser(); // [
parameterType = GetParameterType(sourceToken);
token = PeekToken();
if (token->Class == NumberClass) {
param->ParameterType = ConstantParameter;
param->InterpretedAs = AddressParameter;
param->Value.Number = token->Value.Number;
}
else if (token->Class == RegisterClass) {
param->ParameterType = RegisterParameter;
param->InterpretedAs = AddressParameter;
param->Value.Register = token->Value.Register;
}
else if (token->Class & AddressClass) {
param->ParameterType = AddressParameter;
param->ParameterType = AddressParameter;
symbol = TryGetSymbol(token->Lemexe, MachineState.SymbolsTable);
if (!symbol) symbol = AddSymbolToTable(token->Lemexe, NULL, strlen(token->Lemexe), MachineState.SymbolsTable);
param->Value.Symbol = symbol;
}
else {
fprintf(stderr, "[Error] Line %d: Expected identifier, constant number or register.\n", token->LineNumber);
IgnoreParserLine();
AdvanceParser(); //Consume NewLine
//return NULL;
exit(1);
}
AdvanceParser(); //Consume the parameter it self.
token = PeekToken();
@@ -101,18 +142,21 @@ OpcodeParameter GetParameterType(Token** sourceToken) {
AdvanceParser(); // ]
return AddressParameter;
return param;
case NumberClass:
*sourceToken = token;
param->ParameterType = ConstantParameter;
param->InterpretedAs = ConstantParameter;
param->Value.Number = token->Value.Number;
AdvanceParser();
return ConstantParameter;
return param;
default:
break;
}
return NoParameter;
return param;
}
void HandleOperation() {
@@ -130,9 +174,10 @@ void HandleOperation() {
goto InsertInstruction;
}
ins->ParameterOneType = GetParameterType(&token);
//ins->ParameterOne->ParameterType = GetParameterType(&token);
ins->ParameterOne = GetParameterType();
if (ins->ParameterOneType == NoParameter) {
if (ins->ParameterOne->ParameterType == NoParameter) {
//This would be an error if the next token isn't a line break.
if (PeekToken()->Class != PunctuationClass || PeekToken()->Value.Punctuation != NewLine) {
fprintf(stderr, "[Error] Line %d: Syntax error, expected line break but got %s.\n", token->LineNumber, token->Lemexe);
@@ -143,7 +188,7 @@ void HandleOperation() {
}
if (PeekToken()->Class == PunctuationClass && PeekToken()->Value.Punctuation == NewLine) {
goto InsertInstruction;
goto InsertInstruction;
}
if (PeekToken()->Class != PunctuationClass || PeekToken()->Value.Punctuation != Comma) {
@@ -154,7 +199,8 @@ void HandleOperation() {
AdvanceParser(); //Consume the comma
ins->ParameterTwoType = GetParameterType(&token);
//ins->ParameterTwo->ParameterType = GetParameterType(&token);
ins->ParameterTwo = GetParameterType();
InsertInstruction:
@@ -212,7 +258,10 @@ Token* PeekToken(void) {
void IgnoreParserLine(void) {
while(!ParserAtEnd()) {
if (PeekToken()->Class == PunctuationClass && PeekToken()->Value.Punctuation == NewLine) break;
if (PeekToken()->Class == PunctuationClass && PeekToken()->Value.Punctuation == NewLine) {
AdvanceParser();
break;
}
if (PeekToken()->EndOfFile) break;