1 files changed, 73 insertions, 0 deletions
diff --git a/src/disk.c b/src/disk.c
new file mode 100644
index 0000000..8ccaf8e
--- /dev/null
+++ b/src/disk.c
@@ -0,0 +1,73 @@
+
+#include "project.h"
+
+
+DISK *
+disk_open (char *fn)
+{
+  DISK *ret = calloc (1, sizeof (DISK));
+  off_t o;
+
+  ret->fd = open (fn, O_RDWR);
+
+  if (ret->fd < 0)
+    {
+      free (ret);
+      return NULL;
+    }
+
+
+  ret->name = strdup (fn);
+
+  ret->lbas = lseek (ret->fd, (off_t) 0, SEEK_END);
+
+
+  ret->lbas = ret->lbas / (uint64_t) SECTOR_SIZE;
+
+  fprintf (stderr, "Opened %s with size of %d lbas\n", ret->name,
+           (int) ret->lbas);
+
+  return ret;
+}
+
+void
+disk_read (DISK * d, void *buf, uint64_t lba, int lbas)
+{
+  lba *= SECTOR_SIZE;
+
+  if (lseek (d->fd, lba, SEEK_SET) != lba)
+    {
+      perror ("lseek");
+      abort ();
+    }
+
+  lbas *= SECTOR_SIZE;
+  if (read (d->fd, buf, lbas) != lbas)
+    {
+      perror ("read");
+      abort ();
+    }
+}
+void
+disk_write (DISK * d, void *buf, uint64_t lba, int lbas)
+{
+  lba *= SECTOR_SIZE;
+
+  if (lseek (d->fd, lba, SEEK_SET) != lba)
+    {
+      perror ("lseek");
+      abort ();
+    }
+
+  lbas *= SECTOR_SIZE;
+  if (write (d->fd, buf, lbas) != lbas)
+    {
+      perror ("write");
+      abort ();
+    }
+}
+
+uint64_t disk_lbas(DISK *d)
+{
+return d->lbas;
+}