First steps to modular emulator

src/6502/6502.c

@@ -205,17 +205,8 @@ void execute() {
 		}
 	}
 }
-int main(int argc, char *argv[]) {
-        if (argc < 2) {
-	  printf("%s: No input file specified\n", "yemu");
-	  return 1;
-	}
+void init6502(FILE *infile) {
 	reset();
-	FILE *infile = fopen(argv[1], "rb");
-	if (infile == NULL) {
-	  perror("yemu");
-	  return 1;
-	}
 	char ch;
 	int pos = 0;
 	while (1) { // FIXME
@@ -229,5 +220,5 @@ int main(int argc, char *argv[]) {
         
 	execute();
 	dump_cpu(cpu);
-	return 0;
+	return;
 }

src/6502/6502.h

@@ -1,3 +1,5 @@
+#include <stdio.h>
+
 typedef unsigned char byte; // 8 bit
 typedef unsigned short word; // 16 bit
 
@@ -66,3 +68,4 @@ struct CPU {
 	byte	N; // Negative Flag
 };
 
+void init6502(FILE *infile);

src/Makefile

@@ -2,7 +2,7 @@ CC = gcc
 CFLAGS= -O2 -Wall -Wextra
 LFLAGS=
 
-SRCFILES= main.c
+SRCFILES= main.c 6502/6502.c
 OBJFILES= yemu-6502
 
 .PHONY: all clean 

src/main.c

@@ -0,0 +1,18 @@
+#include "6502/6502.h"
+#include <stdio.h>
+#include <stddef.h>
+
+int main(int argc, char *argv[]) {
+  if (argc < 2) {
+    printf("%s: No input file specified\n", "yemu");
+    return 1;
+  }
+	
+  FILE *infile = fopen(argv[1], "rb");
+  if (infile == NULL) {
+    perror("yemu");
+    return 1;
+  }        
+  init6502(infile);
+  return 0;
+}