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- # coding=utf-8
- '''
- unsigned char* -> POINTER(c_ubyte)
- data: bytes
- ubuffer = (c.c_ubyte * len(data))(*data)
- from ctypes.wintypes import BOOL
- '''
- import ctypes as c
- import sys
- charset = "utf-8"
- # charset = "gbk"
- py_str = lambda x: x.decode(charset) if x is not None else None
- str2bytes = lambda x: x.encode(charset) if x is not None else None
- # str->const char*
- py_str_c_c_char_p = lambda x: c.c_char_p(str2bytes(x))
- # str->const wchar*
- py_str_c_c_wchar_p = lambda x: c.c_wchar_p(x)
- # str->char*
- py_str_c_char_p = lambda x, size=None: c.cast(c.create_string_buffer(str2bytes(x), size), c.c_char_p)
- # char*->str
- c_char_p_py_str = lambda x, size=-1: c.string_at(x, size)
- def lib_loader(dll_fps: dict, exported_functions: list):
- sp = str(sys.platform)
- dll_fp = dll_fps.get(sp)
- # create the library...
- if sp == "win32":
- lib = c.windll.LoadLibrary(dll_fp)
- else:
- lib = c.cdll.LoadLibrary(dll_fp)
- # register the functions...
- for item in exported_functions:
- func = getattr(lib, item[0])
- try:
- if item[1]:
- func.argtypes = item[1]
- func.restype = item[2]
- except KeyError:
- pass
- try:
- if item[3]:
- func.errcheck = item[3]
- except KeyError:
- print("Error assigning check function to %s", func)
- return lib
- def lib_load_default(dll_fps: dict, exported_functions: list):
- try:
- _lib = lib_loader(dll_fps, exported_functions)
- except Exception as e:
- # logger.error(e)
- _lib = None
- return _lib
- class BaseStructure(c.Structure):
- def __init__(self, **kwargs):
- """
- Ctypes.Structure with integrated default values.
- :param kwargs: values different to defaults
- :type kwargs: dict
- """
- values = type(self)._defaults_.copy()
- for (key, val) in kwargs.items():
- values[key] = val
- super().__init__(**values) # Python 3 syntax
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