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import os
def parse_distributions_h(ffi, inc_dir):
"""
Parse distributions.h located in inc_dir for CFFI, filling in the ffi.cdef
Read the function declarations without the "#define ..." macros that will
be filled in when loading the library.
"""
with open(os.path.join(inc_dir, 'random', 'bitgen.h')) as fid:
s = []
for line in fid:
# massage the include file
if line.strip().startswith('#'):
continue
s.append(line)
ffi.cdef('\n'.join(s))
with open(os.path.join(inc_dir, 'random', 'distributions.h')) as fid:
s = []
in_skip = 0
ignoring = False
for line in fid:
# check for and remove extern "C" guards
if ignoring:
if line.strip().startswith('#endif'):
ignoring = False
continue
if line.strip().startswith('#ifdef __cplusplus'):
ignoring = True
# massage the include file
if line.strip().startswith('#'):
continue
# skip any inlined function definition
# which starts with 'static inline xxx(...) {'
# and ends with a closing '}'
if line.strip().startswith('static inline'):
in_skip += line.count('{')
continue
elif in_skip > 0:
in_skip += line.count('{')
in_skip -= line.count('}')
continue
# replace defines with their value or remove them
line = line.replace('DECLDIR', '')
line = line.replace('RAND_INT_TYPE', 'int64_t')
s.append(line)
ffi.cdef('\n'.join(s))
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