Parsing C header files with python

[Paddy McCarthy]

Ian McConnell <ian at emit.demon.co.uk> wrote in message news:<873c2gzftf.fsf at emit.demon.co.uk>...
> I've got a header file which lists a whole load of C functions of the form
> 
>   int func1(float *arr, int len, double arg1);
>   int func2(float **arr, float *arr2, int len, double arg1, double arg2);
> 
> It's a numerical library so all functions return an int and accept varying
> combinations of float pointers, ints and doubles. 
> 
> What's the easiest way breaking down this header file into a list of
> functions and their argument using python? Is there something that will
> parse this (Perhaps a protoize.py) ? I don't want (or understand!) a full C
> parser, just this simple case.
> 
<<SNIP>>
> 
> Thanks,
>         Ian
Would this suffice:

<CODE>

>>> import re
>>> import pprint
>>> hdr='''  int func1(float *arr, int len, double arg1);
  int func2(float **arr, float *arr2, int len, double arg1, double arg2);

'''
>>> print hdr
  int func1(float *arr, int len, double arg1);
  int func2(float **arr, float *arr2, int len, double arg1, double arg2);


>>> func2args = {}
>>> for line in hdr.split('\n'):
	line = [word for word in re.split(r'[\s,;()]+', line) if word]
	if len(line)>2:func2args[line[1]] = line[2:]

	
>>> pprint.pprint(func2args)
{'func1': ['float', '*arr', 'int', 'len', 'double', 'arg1'],
 'func2': ['float',
           '**arr',
           'float',
           '*arr2',
           'int',
           'len',
           'double',
           'arg1',
           'double',
           'arg2']}
>>> 

</CODE>