[Yaffs] Python test harness for yaffs

Hi All

I've added a python test harness to yaffs2/direct/python. This has been done
as a way to streamline testing as well as give a reason/excuse to learn some
python.

This uses the python ctypes mechanism. I started with SWIG, but some hassles
and a discussion on the nzpug mailing list soon pointed me towards ctypes
which has proven to be a lot simpler.

-- Charles


$ make

$ python
Python 2.6.2 (release26-maint, Apr 19 2009, 01:56:41)
[GCC 4.3.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from yaffsfs import *
>>> yaffs_StartUp()
0
>>> yaffs_mount("/yaffs2")
0
>>> yaffs_open("/yaffs2/xx",66,0666)
yaffs: Tnodes added
Allocated block 1, seq 4097, 255 left
0
>>> yaffs_write(0,"abcdefg",5)
5
>>> b = create_string_buffer("",100)
>>> yaffs_lseek(0,0,0)
0
>>> yaffs_read(0,b,100)
5
>>> print b.value
abcde

...