import distutils.ccompilerimport sysimport osimport subprocessimport globfrom distutils.sysconfig import customize_compilerfrom gen_code import MappedObject 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    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']     # On win-amd64 (py3.x), the default compiler is cross-compiling, from x86    # to amd64 with %WIN_SDK_ROOT%\x86_amd64\cl.exe, but using this binary as a    # pre-processor generates no output, so we use %WIN_SDK_ROOT%\cl.exe    # instead.    if len(cpp_cmd) > 1 and 'cl.exe' in cpp_cmd[-2]:        plat = os.path.basename(os.path.dirname(cpp_cmd[-2]))        if plat == 'x86_amd64':            print('workaround on win64 to avoid empty pre-processor output')            cpp_cmd[-2] = cpp_cmd[-2].replace('x86_amd64', '')        elif True in ['amd64' in f for f in cpp_cmd]:            print('warning: not using workaround for', cpp_cmd[0], plat)     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']    if 'emcc' in cpp_cmd:        cpp_cmd += ['-x', 'c'] # emcc defaults to c++, force C language    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_output = get_cpp_output(header=header, usedouble=usedouble)    return filter_cpp_output (cpp_output)  def get_cpp_output(header=header, usedouble=False):    ''' find and run a C pre-processor on 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 err_output:        print("Warning: preprocessor produced errors or warnings:\n%s" \                % err_output.decode('utf8'))    if not cpp_output:        raise_msg = "preprocessor output is empty! Running command " \                + "\"%s\" failed" % " ".join(cpp_cmd)        if err_output:            raise_msg += " with stderr: \"%s\"" % err_output.decode('utf8')        else:            raise_msg += " with no stdout or stderr"        raise Exception(raise_msg)    if not isinstance(cpp_output, list):        cpp_output = [l.strip() for l in cpp_output.decode('utf8').split('\n')]     return cpp_output def filter_cpp_output(cpp_raw_output):    ''' prepare cpp-output for parsing '''    cpp_output = filter(lambda y: len(y) > 1, cpp_raw_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': [], 'rdo': [], '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 '_rdo' in fn:                    lib[shortname]['rdo'].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 = []    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)