diff --git a/src/fileaccess.c b/src/fileaccess.c
index e3e5df8..3ee3831 100644
--- a/src/fileaccess.c
+++ b/src/fileaccess.c
@@ -1,32 +1,56 @@
 #include <stdio.h>
 #include <string.h>
 
-bool isValidFileFormat(char filename[], char expectedExtension[]){
+#define MAX_ASM_LINE_LENGTH 100
+
+int isValidFileFormat(char filename[], char expectedExtension[]){
     int *pointLoc = strrchr(filename, '.');
 
     if(pointLoc != NULL){
         if(strcmp(pointLoc, expectedExtension)==0){
-            return true;
+            return(1);
         }
     }
-    return false;
+    return(0);
 }
 
 int writeBinaryFile(word instrs[], char outputFile[]){
 
     if (!isValidFileFormat(filename, "bin")){
-        return(1);
+        return(-1);
     }
 
     FILE *fp; 
     
     fp = fopen(outputFile, "wb");
+
+    if(fp == NULL){
+        return(-1);
+    }
+
     fwrite(instrs, 4, sizeof(instrs), fp);
     fclose(fp);
 
     return(0);
 }
 
-int readAssemblyFile() {
+int readAssemblyFile(char inputFile[]) {
+    if (!isValidFileFormat(filename, "s")){
+        return(1);
+    }
 
+    FILE *fp;
+    char savedLine[MAX_ASM_LINE_LENGTH];
+
+    fp = fopen(inputFile, "r");
+
+    if(fp == NULL){
+        return(-1);
+    }
+    
+    while (fgets(savedLine, MAX_ASM_LINE_LENGTH-1, fp) != NULL) {
+        //pass line to parser
+    }
+
+    return(0);
 }
\ No newline at end of file