ref: ce5475207e4b3355ae3ab825a551a2845afa8825
dir: /python/lib/gen_external.py/
import distutils.ccompiler import sys import os import subprocess import glob header = os.path.join('src', 'aubio.h') output_path = os.path.join('python', 'gen') source_header = """// this file is generated! do not modify #include "aubio-types.h" """ default_skip_objects = [ # already in ext/ 'fft', 'pvoc', 'filter', 'filterbank', # AUBIO_UNSTABLE 'hist', 'parameter', 'scale', 'beattracking', 'resampler', 'peakpicker', 'pitchfcomb', 'pitchmcomb', 'pitchschmitt', 'pitchspecacf', 'pitchyin', 'pitchyinfft', 'pitchyinfast', 'sink', 'sink_apple_audio', 'sink_sndfile', 'sink_wavwrite', #'mfcc', 'source', 'source_apple_audio', 'source_sndfile', 'source_avcodec', 'source_wavread', #'sampler', 'audio_unit', 'spectral_whitening', ] def get_preprocessor(): # findout which compiler to use from distutils.sysconfig import customize_compiler compiler_name = distutils.ccompiler.get_default_compiler() compiler = distutils.ccompiler.new_compiler(compiler=compiler_name) try: customize_compiler(compiler) except AttributeError as e: print("Warning: failed customizing compiler ({:s})".format(repr(e))) if hasattr(compiler, 'initialize'): try: compiler.initialize() except ValueError as e: print("Warning: failed initializing compiler ({:s})".format(repr(e))) cpp_cmd = None if hasattr(compiler, 'preprocessor'): # for unixccompiler cpp_cmd = compiler.preprocessor elif hasattr(compiler, 'compiler'): # for ccompiler cpp_cmd = compiler.compiler.split() cpp_cmd += ['-E'] elif hasattr(compiler, 'cc'): # for msvccompiler cpp_cmd = compiler.cc.split() cpp_cmd += ['-E'] if not cpp_cmd: print("Warning: could not guess preprocessor, using env's CC") cpp_cmd = os.environ.get('CC', 'cc').split() cpp_cmd += ['-E'] cpp_cmd += ['-x', 'c'] # force C language (emcc defaults to c++) return cpp_cmd def get_c_declarations(header=header, usedouble=False): ''' return a dense and preprocessed string of all c declarations implied by aubio.h ''' cpp_cmd = get_preprocessor() macros = [('AUBIO_UNSTABLE', 1)] if usedouble: macros += [('HAVE_AUBIO_DOUBLE', 1)] if not os.path.isfile(header): raise Exception("could not find include file " + header) includes = [os.path.dirname(header)] cpp_cmd += distutils.ccompiler.gen_preprocess_options(macros, includes) cpp_cmd += [header] print("Running command: {:s}".format(" ".join(cpp_cmd))) proc = subprocess.Popen(cpp_cmd, stderr=subprocess.PIPE, stdout=subprocess.PIPE) assert proc, 'Proc was none' cpp_output = proc.stdout.read() err_output = proc.stderr.read() if not cpp_output: raise Exception("preprocessor output is empty:\n%s" % err_output) elif err_output: print("Warning: preprocessor produced warnings:\n%s" % err_output) if not isinstance(cpp_output, list): cpp_output = [l.strip() for l in cpp_output.decode('utf8').split('\n')] cpp_output = filter(lambda y: len(y) > 1, cpp_output) cpp_output = list(filter(lambda y: not y.startswith('#'), cpp_output)) i = 1 while 1: if i >= len(cpp_output): break if ('{' in cpp_output[i - 1]) and ('}' not in cpp_output[i - 1]) or (';' not in cpp_output[i - 1]): cpp_output[i] = cpp_output[i - 1] + ' ' + cpp_output[i] cpp_output.pop(i - 1) elif ('}' in cpp_output[i]): cpp_output[i] = cpp_output[i - 1] + ' ' + cpp_output[i] cpp_output.pop(i - 1) else: i += 1 # clean pointer notations tmp = [] for l in cpp_output: tmp += [l.replace(' *', ' * ')] cpp_output = tmp return cpp_output def get_cpp_objects_from_c_declarations(c_declarations, skip_objects=None): if skip_objects is None: skip_objects = default_skip_objects typedefs = filter(lambda y: y.startswith('typedef struct _aubio'), c_declarations) cpp_objects = [a.split()[3][:-1] for a in typedefs] cpp_objects_filtered = filter(lambda y: not y[6:-2] in skip_objects, cpp_objects) return cpp_objects_filtered def get_all_func_names_from_lib(lib): ''' return flat string of all function used in lib ''' res = [] for _, v in lib.items(): if isinstance(v, dict): res += get_all_func_names_from_lib(v) elif isinstance(v, list): for elem in v: e = elem.split('(') if len(e) < 2: continue # not a function fname_part = e[0].strip().split(' ') fname = fname_part[-1] if fname: res += [fname] else: raise NameError('gen_lib : weird function: ' + str(e)) return res def generate_lib_from_c_declarations(cpp_objects, c_declarations): ''' returns a lib from given cpp_object names a lib is a dict grouping functions by family (onset,pitch...) each eement is itself a dict of functions grouped by puposes as : struct, new, del, do, get, set and other ''' lib = {} for o in cpp_objects: shortname = o if o[:6] == 'aubio_': shortname = o[6:-2] # without aubio_ prefix and _t suffix lib[shortname] = {'struct': [], 'new': [], 'del': [], 'do': [], 'get': [], 'set': [], 'other': []} lib[shortname]['longname'] = o lib[shortname]['shortname'] = shortname fullshortname = o[:-2] # name without _t suffix for fn in c_declarations: func_name = fn.split('(')[0].strip().split(' ')[-1] if func_name.startswith(fullshortname + '_') or func_name.endswith(fullshortname): # print "found", shortname, "in", fn if 'typedef struct ' in fn: lib[shortname]['struct'].append(fn) elif '_do' in fn: lib[shortname]['do'].append(fn) elif 'new_' in fn: lib[shortname]['new'].append(fn) elif 'del_' in fn: lib[shortname]['del'].append(fn) elif '_get_' in fn: lib[shortname]['get'].append(fn) elif '_set_' in fn: lib[shortname]['set'].append(fn) else: # print "no idea what to do about", fn lib[shortname]['other'].append(fn) return lib def print_c_declarations_results(lib, c_declarations): for fn in c_declarations: found = 0 for o in lib: for family in lib[o]: if fn in lib[o][family]: found = 1 if found == 0: print("missing", fn) for o in lib: for family in lib[o]: if type(lib[o][family]) == str: print("{:15s} {:10s} {:s}".format(o, family, lib[o][family])) elif len(lib[o][family]) == 1: print("{:15s} {:10s} {:s}".format(o, family, lib[o][family][0])) else: print("{:15s} {:10s} {:s}".format(o, family, lib[o][family])) def generate_external(header=header, output_path=output_path, usedouble=False, overwrite=True): if not os.path.isdir(output_path): os.mkdir(output_path) elif not overwrite: return sorted(glob.glob(os.path.join(output_path, '*.c'))) c_declarations = get_c_declarations(header, usedouble=usedouble) cpp_objects = get_cpp_objects_from_c_declarations(c_declarations) lib = generate_lib_from_c_declarations(cpp_objects, c_declarations) # print_c_declarations_results(lib, c_declarations) sources_list = [] try: from .gen_code import MappedObject except (SystemError, ValueError): from gen_code import MappedObject for o in lib: out = source_header mapped = MappedObject(lib[o], usedouble=usedouble) out += mapped.gen_code() output_file = os.path.join(output_path, 'gen-%s.c' % o) with open(output_file, 'w') as f: f.write(out) print("wrote %s" % output_file) sources_list.append(output_file) out = source_header out += "#include \"aubio-generated.h\"" check_types = "\n || ".join(["PyType_Ready(&Py_%sType) < 0" % o for o in lib]) out += """ int generated_types_ready (void) {{ return ({pycheck_types}); }} """.format(pycheck_types=check_types) add_types = "".join([""" Py_INCREF (&Py_{name}Type); PyModule_AddObject(m, "{name}", (PyObject *) & Py_{name}Type);""".format(name=o) for o in lib]) out += """ void add_generated_objects ( PyObject *m ) {{ {add_types} }} """.format(add_types=add_types) output_file = os.path.join(output_path, 'aubio-generated.c') with open(output_file, 'w') as f: f.write(out) print("wrote %s" % output_file) sources_list.append(output_file) objlist = "".join(["extern PyTypeObject Py_%sType;\n" % p for p in lib]) out = """// generated list of objects created with gen_external.py #include <Python.h> """ if usedouble: out += """ #ifndef HAVE_AUBIO_DOUBLE #define HAVE_AUBIO_DOUBLE 1 #endif """ out += """ {objlist} int generated_objects ( void ); void add_generated_objects( PyObject *m ); """.format(objlist=objlist) output_file = os.path.join(output_path, 'aubio-generated.h') with open(output_file, 'w') as f: f.write(out) print("wrote %s" % output_file) # no need to add header to list of sources return sorted(sources_list) if __name__ == '__main__': if len(sys.argv) > 1: header = sys.argv[1] if len(sys.argv) > 2: output_path = sys.argv[2] generate_external(header, output_path)