Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / openbios / fs / ext2 / ext2_lseek.c

diff --git a/qemu/roms/openbios/fs/ext2/ext2_lseek.c b/qemu/roms/openbios/fs/ext2/ext2_lseek.c
new file mode 100644 (file)
index 0000000..e837d89
--- /dev/null
+++ b/qemu/roms/openbios/fs/ext2/ext2_lseek.c
@@ -0,0 +1,38 @@
+/*
+ *
+ * (c) 2008-2009 Laurent Vivier <Laurent@lvivier.info>
+ *
+ * This file has been copied from EMILE, http://emile.sf.net
+ *
+ */
+
+#include "libext2.h"
+#include "ext2.h"
+
+int ext2_lseek(ext2_FILE *file, long offset, int whence)
+{
+       long new_offset;
+
+       switch(whence)
+       {
+       case SEEK_SET:
+               new_offset = offset;
+               break;
+       case SEEK_CUR:
+               new_offset = file->offset + offset;
+               break;
+       case SEEK_END:
+               new_offset = file->inode->i_size + offset;
+               break;
+       default:
+               return -1;
+       }
+
+       if ( (new_offset < 0) ||
+            (new_offset > file->inode->i_size) )
+               return -1;
+
+       file->offset = new_offset;
+
+       return new_offset;
+}