starting work on tokenizer for assembly language

README.md

@@ -8,7 +8,7 @@
 
 But uhh that's the name of the VM itself, the name of the programming language I made is Sylt, named after the German island.
 
-To compile for Linux: `gcc src/main.c src/vmbl.c src/exception.c -o VMBL -O3`
+To compile for Linux: `gcc src/main.c src/vmbl.c src/exception.c src/asm/tokenize.c -o VMBL -O3`
 
 ## Syntax
 ### Example "Hello, World!" Program

src/asm/tokenize.c

@@ -0,0 +1,56 @@
+#include "tokenize.h"
+#include <stdio.h>
+#include <ctype.h>
+
+
+char *parseName(Tokenizer *tokenizer) {
+	char *ptr = tokenizer->source;
+
+	int i = 0;
+	while (isName(*ptr++))
+	{
+		i++;
+	}
+
+	printf("%d\n", i);
+	return "hi";
+	
+}
+
+bool isNumber(char character) {
+	return isalnum(character) || character == '.';
+}
+
+bool isName(char character) {
+	return isalnum(character) || character == '_';
+}
+
+Token getCurrentToken(Tokenizer *tokenizer) {
+	Token token = (Token){};
+
+	switch (*tokenizer->source)
+	{
+	default:
+		if (isName(*tokenizer->source)) {
+			char *tokenValue = parseName(tokenizer);
+		}
+
+		break;
+	}
+}
+
+char* tokenTypeAsCStr(TokenType type) {
+	switch (type)
+	{
+	case TOKEN_INSTRUCTION:
+		return "INSTRUCTION";
+		break;
+
+	case TOKEN_INT_LITERAL:
+		return "INT_LITERAL";
+		break;
+	
+	default:
+		break;
+	}
+}

src/asm/tokenize.h

@@ -0,0 +1,33 @@
+#ifndef TOKENIZE_H
+#define TOKENIZE_H
+
+#include <stdbool.h>
+
+typedef enum
+{
+	TOKEN_INSTRUCTION,
+	TOKEN_INT_LITERAL,
+} TokenType;
+
+typedef struct
+{
+	TokenType type;
+	char* value;
+} Token;
+
+typedef struct
+{
+	char *source;
+	unsigned int pos;
+	unsigned int line;
+	unsigned int column;
+} Tokenizer;
+
+bool isNumber(char character);
+bool isName(char character);
+Token getCurrentToken(Tokenizer *tokenizer);
+char* tokenTypeAsCStr(TokenType type);
+
+char *parseName(Tokenizer *tokenizer);
+
+#endif // !TOKENIZE_H

src/main.c

@@ -1,19 +1,28 @@
 #include "vmbl.h"
+#include "asm/tokenize.h"
+#include <stdio.h>
 
 #define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0])); 
 
 VMBL_Instruction program[] = {
-	MAKE_INST_PUSH(123),
+	MAKE_INST_PUSH(124),
-	MAKE_INST_PUSH(0),
+	MAKE_INST_PUSH(2),
 	MAKE_INST_DIV,
-
+	MAKE_INST_HALT
 };
 
 int main() {
-	VMBL_State vmblState = {};
+	//VMBL_State vmblState = {};
 
-	VMBL_LoadExecutable(&vmblState, program, sizeof(program));
+	//VMBL_LoadExecutable(&vmblState, program, sizeof(program));
-	VMBL_StartVM(&vmblState);
+	//VMBL_StartVM(&vmblState);
+
+	Tokenizer tokenizer = {
+		"push 1224\npush 2\ndiv\nhalt"
+	};
+	Token token = getCurrentToken(&tokenizer);
+
+	printf("%s\n", tokenTypeAsCStr(token.type));
 
 	return 0;
 }

src/vmbl.c

@@ -11,7 +11,6 @@
 		 }										  													   										   								  													  						  													   								  													   								  													   								  													   \
 		(vmblState)->stack[(vmblState)->stackSize - 2] = (vmblState)->stack[(vmblState)->stackSize - 2] operation (vmblState)->stack[(vmblState)->stackSize - 1]; \
 		(vmblState)->stackSize--;                                                                     													          \
-		(vmblState)->ip++;																			                                                              \
 	} while (0);
 
 
@@ -37,7 +36,7 @@ VMBL_Exception VBML_ExecuteInstruction(VMBL_State *vmblState, VMBL_Instruction i
 		MATH_OP(vmblState, *);
 		break;
 	case INSTRUCTION_DIV:
-		if (instruction.opperands[0] == 0) {
+		if (vmblState->stack[vmblState->stackSize-1] == 0) {
 			return (VMBL_Exception){ EXCEPTION_DIVIDE_BY_ZERO };
 		}
 
@@ -152,7 +151,7 @@ void VMBL_LoadExecutable(VMBL_State *vmblState, VMBL_Instruction *program, size_
 		exit(1);
 	}
 
-	memcpy(&vmblState->program, program, sizeof(program) * programSize);
+	memcpy(&vmblState->program, program, programSize);
 
 	vmblState->programSize = programSize;
 }
@@ -192,6 +191,7 @@ void VMBL_SaveExecutable(const char* filePath, VMBL_Instruction *program, size_t
 }
 
 char *instructionTypeToCStr(InstructionType type) {
+	printf("%x\n", type);
 	switch (type)
 	{
 
@@ -227,6 +227,21 @@ char *instructionTypeToCStr(InstructionType type) {
 	case INSTRUCTION_EQUAL:
 		return "EQ  ";
 		break;
+	case INSTRUCTION_NOT_EQUAL:
+		return "NEQ  ";
+		break;
+	case INSTRUCTION_GREATER_THAN:
+		return "GT  ";
+		break;
+	case INSTRUCTION_GREATER_THAN_EQUAL:
+		return "GTE ";
+		break;
+	case INSTRUCTION_LESS_THAN:
+		return "LT  ";
+		break;
+	case INSTRUCTION_LESS_THAN_EQUAL:
+		return "LTE ";
+		break;
 
 	case INSTRUCTION_JUMP_CONDITIONAL:
 		return "JC  ";