Updated the parser to better handle parameters, sort of and including a string length assembly program to use as a test for the whole assembler.

src/parser.c

@@ -10,19 +10,14 @@ int CurrentToken = 0;
 //int HeapStart = 4; // zero indexed, used for declared variables.
 //int BinaryEnd = 4; // Zero indexed (binary starts with a 4 byte header)
 
-//IROpcode* CreateIROpcode(Mnemonic mnemonic);
 void PrintSymbols(void);
 void HandleOperation(void);
 void HandleAssemblerDirective(void);
 void AdvanceParser(void);
+void IgnoreParserLine(void);
 Token* PeekToken(void);
 int ParserAtEnd(void);
 int Expect(int, ...);
-//List* SymbolsTable;
-// unsigned int HeapTop = 4;
-// unsigned int ProgramCounter = 0;
-// unsigned char Heap[HIGHMEMORY];
-// unsigned char Memory[HIGHMEMORY];
 IRState MachineState;
 
 IRState* ParseTokens(List* tokens) {
@@ -40,9 +35,8 @@ IRState* ParseTokens(List* tokens) {
         Token* t = PeekToken();
 
         switch(t->Class) {
-            case DirectiveClass:
-                //HandleAssemblerDirective();
-                //while(!ParserAtEnd() && (PeekToken()->Class == PunctuationClass && PeekToken()->Value.Punctuation != NewLine)) AdvanceParser();
+            case DirectiveClass: //Maybe these should be ignored, let another process handle that.
+                IgnoreParserLine();
                 break;
             case MnemonicClass:
                 HandleOperation();
@@ -50,7 +44,7 @@ IRState* ParseTokens(List* tokens) {
             case LabelClass:
                 printf("%s: \n", t->Lemexe);
                 AddSymbolToTable(t->Lemexe, NULL, strlen(t->Lemexe), MachineState.SymbolsTable);
-                //AddSymbol(t, 2, ProgramCounter, 1);
+                AdvanceParser(); //Consume the NewLine
                 break;
             default:
                 fprintf(stderr, "[Error] Line %d: Syntax error, expected start of expression, got '%c' [%d].\n", t->LineNumber, t->Value.Punctuation, t->Class);
@@ -161,45 +155,43 @@ void HandleOperation() {
 
     AdvanceParser();
 
-    while(!ParserAtEnd()) {
-        if (PeekToken()->Class == PunctuationClass && PeekToken()->Value.Punctuation == NewLine) {
-            break;
-        }
-
-        ins->ParameterOneType = GetParameterType(&token);
-
-        if (ins->ParameterOneType == NoParameter) { 
-            AdvanceParser(); //Comsume the line end
-            break;
-        }
-
-        if (PeekToken()->Class == PunctuationClass) {
-            if (PeekToken()->Value.Punctuation == NewLine) { 
-                AdvanceParser(); //Comsume end line.
-                break;
-            }
-            else if (PeekToken()->Value.Punctuation != Comma) {
-                fprintf(stderr, "[Error] Line %d: comma need for %s\n", token->LineNumber, mn);
-                exit(1);                
-            }
-        } else {
-            fprintf(stderr, "[Error] Line %d: comma needed for %s\n", token->LineNumber, mn);
-            exit(1);  
-        }
-
-        AdvanceParser(); //Comsume the comma
-
-        ins->ParameterTwoType = GetParameterType(&token);
-
-        AdvanceParser();//comsume the end line.
-
-        break;
-
-        //AdvanceParser();
+    //No parameters here, we have a line break.
+    if (PeekToken()->Class == PunctuationClass && PeekToken()->Value.Punctuation == NewLine) { 
+        goto InsertInstruction;
     }
 
+    ins->ParameterOneType = GetParameterType(&token);
+
+    if (ins->ParameterOneType == 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);
+            exit(1);
+        }
+
+        goto InsertInstruction;
+    }
+
+    if (PeekToken()->Class == PunctuationClass && PeekToken()->Value.Punctuation == NewLine) {
+        goto InsertInstruction;      
+    }
+
+    if (PeekToken()->Class != PunctuationClass || PeekToken()->Value.Punctuation != Comma) {
+        //Syntax error
+        fprintf(stderr, "[Error] Line %d: Expected comma.\n", token->LineNumber);
+        exit(1);
+    }
+
+    AdvanceParser(); //Consume the comma
+
+    ins->ParameterTwoType = GetParameterType(&token);
+
+    InsertInstruction:
+
     AddListItem(ins, sizeof(Instruction), MachineState.Instructions);
 
+    AdvanceParser(); //Consume the line break
+
     free(ins);
 }
 
@@ -651,4 +643,14 @@ int ParserAtEnd(void) {
 
 Token* PeekToken(void) {
     return TokensList->content[CurrentToken];
+}
+
+void IgnoreParserLine(void) {
+    while(!ParserAtEnd()) {
+        if (PeekToken()->Class == PunctuationClass && PeekToken()->Value.Punctuation == NewLine) break;
+
+        if (PeekToken()->EndOfFile) break;
+
+        AdvanceParser();
+    }
 }