By default functions are assumed to return the C int type. Other return types can be specified by setting the restype attribute of the function object. Here is a more advanced example, it uses the strchr function, which expects a string pointer and a char, and returns a pointer to a str...
find_library(name) 尝试寻找一个库并返回路径名称。 name 是库名称并且不带任何前缀如 lib 以及后缀如 .so,.dylib 或版本号(形式与 posix 链接器选项 -l 所用的一致)。 如果找不到库,则返回 None。 确切的功能取决于系统。 ctypes.util.find_msvcrt() 仅限Windows:返回 Python 以及扩展模块所使用的 VC ...
This example calls both functions with a NULL pointer (None should be used as the NULL pointer): >>> >>> print(libc.time(None)) 1150640792 >>> print(hex(windll.kernel32.GetModuleHandleA(None))) 0x1d000000 >>> 注解 调用该函数,若 ctypes 发现传入的参数个数不符,则会甩出一个异常 ValueE...
] # Lib C functions _libc = ctypes.CDLL(find_library('c')) _libc.free.argtypes = [ctypes.c_void_p] _libc.free.restype = ctypes.c_void_p # Lib shared functions _libblog = ctypes.CDLL("./") _libblog.increment_string.argtypes = [ctypes.c_char_p, ctypes.c_int] _libblog.in...
(c_double)),]# Lib C functions_libc = ctypes.CDLL(find_library('c'))_libc.free.argtypes = [ctypes.c_void_p]_libc.free.restype = ctypes.c_void_p# Lib shared functions_libblog = ctypes.CDLL("./fastc.so")_libblog.increment_string.argtypes = [ctypes.c_char_p, ctypes.c_int]...
ctypes.util.find_library(name) :尝试寻找一个库,然后返回其路径名 name 是库名称, 且去除了 lib 等前缀 和 .so 、 .dylib 、版本 等后缀(这是 posix 连接器 -l 选项使用的格式)。如果没有找到对应的库,则返回 None 。 确切的功能取决于系统。 在Linux 上, find_library() 会尝试运行外部程序(/...
_libc = ctypes.CDLL(find_library('c')) _libc.free.argtypes =[ctypes.c_void_p] _libc.free.restype = ctypes.c_void_p # Lib shared functions _libblog = ctypes.CDLL("./fastc.so") _libblog.increment_string.argtypes =[ctypes.c_char_p, ctypes.c_int] ...
By default functions are assumed to return the C int type. Other return types can be specified by setting the restype attribute of the function object. Here is a more advanced example, it uses the strchr function, which expects a string pointer and a char, and returns a pointer to a str...
_libc = ctypes.CDLL(find_library('c')) _libc.free.argtypes =[ctypes.c_void_p] _libc.free.restype = ctypes.c_void_p # Lib shared functions _libblog = ctypes.CDLL("./fastc.so") _libblog.increment_string.argtypes =[ctypes.c_char_p, ctypes.c_int] ...
ctypes does not support passing unions or structures with bit-fields to functions by value. While this may work on 32-bit x86, it’s not guaranteed by the library to work in the general case. Unions and structures with bit-fields should always be passed to functions by pointer. ...