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""" |
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String and data utils |
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""" |
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import sys |
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import os |
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IOENCODING = os.environ.get('PYEPICS_ENCODING', |
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os.environ.get('PYTHONIOENCODING', |
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'utf-8')) |
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def str2bytes(st1): |
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'string to byte conversion' |
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if isinstance(st1, bytes): |
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return st1 |
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return bytes(st1, IOENCODING) |
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def bytes2str(st1): |
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'byte to string conversion' |
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if isinstance(st1, str): |
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return st1 |
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elif isinstance(st1, bytes): |
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return str(st1, IOENCODING) |
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else: |
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return str(st1) |
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def strjoin(sep, seq): |
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"join string sequence with a separator" |
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if isinstance(sep, bytes): |
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sep = bytes2str(sep) |
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if len(seq) == 0: |
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seq = '' |
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elif isinstance(seq[0], bytes): |
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tmp =[] |
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for i in seq: |
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if i == b'\x00': |
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break |
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tmp.append(bytes2str(i)) |
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seq = tmp |
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return sep.join(seq) |
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def clib_search_path(lib): |
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'''Assemble path to c library. |
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Parameters |
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---------- |
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lib : str |
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Either 'ca' or 'Com'. |
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Returns |
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-------- |
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str : string |
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Examples |
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-------- |
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>>> clib_search_path('ca') |
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'linux64/libca.so' |
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''' |
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try: |
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import platform |
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nbits = platform.architecture()[0] |
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mach = platform.machine() |
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except: |
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nbits = '32bit' |
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mach = 'x86_64' |
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nbits = nbits.replace('bit', '') |
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if mach.startswith('arm'): |
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nbits = 'arm' |
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libfmt = 'lib%s.so' |
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if os.name == 'nt': |
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libsrc = 'win' |
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libfmt = '%s.dll' |
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elif sys.platform == 'darwin': |
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libsrc = 'darwin' |
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if platform.machine() == 'arm64': |
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libsrc, nbits = 'darwinarm', '64' |
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libfmt = 'lib%s.dylib' |
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elif sys.platform.startswith('linux'): |
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libsrc = 'linux' |
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else: |
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return None |
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return os.path.join("%s%s" % (libsrc, nbits), libfmt % lib) |
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