I'm using python 2.6 on Linux/CentOs 6.x
I'm getting ctypes to work, but getting stuck on the use of .argtypes. Can
someone point out what I'm doing. This is my first use of ctypes and it looks
like I'm getting different definitions in stackoverflow that may correspond to
different version of python.
Here is my code. Without the restype/argtypes it works, but I cannot figure
out how to define argtypes to match the data.
mylibrary = ctypes.CDLL(LIBRARY_PATH)
mdsconvert = mylibrary.RugVersionConverter
mdsconvert.restype = ctypes.c_int
mdsconvert.argtypes = [ charptr, #flat buffer of mds 3.0 data
ctypes.c_buffer, #computed flat buffer of mds 2.0 data
ctypes.c_buffer #version set to "1.00.4" in c++, never
used
]
def convertMds2to3(mds30buffer):
mds20 = ctypes.create_string_buffer('\000'*3000)
t = ctypes.create_string_buffer('\000'*30)
success = mdsconvert(mds30buffer, ctypes.byref(mds20), ctypes.byref(t) )
print 'convert %s to %s success=%s version=%s' % (len(mds30buffer),
len(mds20.value), success, t.value)
return mds20.value
------------------------------- C++ code looks like this
-------------------------------------------------------
extern "C"
int RugVersionConverter( char * sInputRecord, char * MDS2_Rec, char *
Version );
where sInputRecord is input and MDS2_Rec and Version are output.
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