Start work on filesystem code.

[pintos-anon] / src / filesys / file.h

diff --git a/src/filesys/file.h b/src/filesys/file.h
index 8f2fbc9fb85254e8ccbbd7eb3e07507a0baa5b4a..d165e80bf427123fcd41f1634e5de9cbf117a9b6 100644 (file)
--- a/src/filesys/file.h
+++ b/src/filesys/file.h
@@ -4,12 +4,24 @@
 #include <stdint.h>
 #include <stddef.h>
 
+#ifndef OFF_T
+#define OFF_T
 typedef int32_t off_t;
+#endif
 
-struct file;
+struct file 
+  {
+    struct filehdr *hdr;
+    off_t pos;
+  };
+
+bool file_open (struct file *, const char *name);
+bool file_open_sector (struct file *, disk_sector_no);
 void file_close (struct file *);
 off_t file_read (struct file *, void *, off_t);
+off_t file_read_at (struct file *, void *, off_t size, off_t start);
 off_t file_write (struct file *, const void *, off_t);
+off_t file_write_at (struct file *, const void *, off_t size, off_t start);
 off_t file_length (struct file *);
 void file_seek (struct file *, off_t);
 off_t file_tell (struct file *);