Fixed Open/Close

src/file.c

@@ -7,21 +7,33 @@
 FILE *files[256];
 
 int openFile(int fd, const char *path) {
-  files[fd] = fopen(path, "r+");
-  if (files[fd] == NULL) {
-    return errno;
+  if (files[fd] != NULL) {
+    return STATUS_READY | STATUS_ERROR;
   }
 
-  return 0;
+  files[fd] = fopen(path, "w+");
+  if (files[fd] == NULL) {
+    return STATUS_READY | STATUS_ERROR;
+  }
+
+  return STATUS_READY;
 }
 
 int closeFile(int fd) {
-  int ret = fclose(files[fd]);
-  if (ret != 0) {
-    return errno;
+  FILE *f = files[fd];
+
+  if (f == NULL) {
+    return STATUS_READY | STATUS_ERROR;
   }
 
-  return 0;
+  int ret = fclose(files[fd]);
+  if (ret != 0) {
+    return STATUS_READY | STATUS_ERROR;
+  }
+
+  files[fd] = NULL;
+
+  return STATUS_READY;
 }
 
 int readByte(const int fd, int *data) {
@@ -32,15 +44,13 @@ int readByte(const int fd, int *data) {
     int error = ferror(files[fd]);
     int eof = feof(files[fd]);
     if (error != 0) {
-      status = 0x2;
+      status = STATUS_ERROR;
     } else if (eof != 0) {
-      status = 0x1;
-    } else {
-      status = 0x4;
+      status = STATUS_EOF;
     }
   }
 
-  return status;
+  return STATUS_READY | status;
 }
 
 int writeByte(const int fd, const int data) {
@@ -51,13 +61,11 @@ int writeByte(const int fd, const int data) {
     int error = ferror(files[fd]);
     int eof = feof(files[fd]);
     if (error != 0) {
-      status = 0x2;
+      status = STATUS_ERROR;
     } else if (eof != 0) {
-      status = 0x1;
-    } else {
-      status = 0x4;
+      status = STATUS_EOF;
     }
   }
 
-  return status;
+  return STATUS_READY | status;
 }