Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / openbios / fs / iso9660 / iso9660_lseek.c

diff --git a/qemu/roms/openbios/fs/iso9660/iso9660_lseek.c b/qemu/roms/openbios/fs/iso9660/iso9660_lseek.c
new file mode 100644 (file)
index 0000000..6298758
--- /dev/null
+++ b/qemu/roms/openbios/fs/iso9660/iso9660_lseek.c
@@ -0,0 +1,37 @@
+/*
+ *
+ * (c) 2005-2009 Laurent Vivier <Laurent@vivier.eu>
+ *
+ * This file has been copied from EMILE, http://emile.sf.net
+ *
+ */
+
+#include "libiso9660.h"
+
+int iso9660_lseek(iso9660_FILE *_file, long offset, int whence)
+{
+       iso9660_FILE *file = (iso9660_FILE*)_file;
+       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->size + offset;
+               break;
+       default:
+               return -1;
+       }
+
+       if ( (new_offset < 0) || (new_offset > file->size) )
+               return -1;
+
+       file->offset = new_offset;
+
+       return new_offset;
+}