Python ctypes.wintypes 模块，HLOCAL 实例源码

我们从Python开源项目中，提取了以下2个代码示例，用于说明如何使用ctypes.wintypes.HLOCAL。

项目：kapsel 作者：conda | 项目源码 | 文件源码

def windows_split_command_line(command):
    from ctypes import windll, c_int, POINTER, byref
    from ctypes.wintypes import LPCWSTR, LPWSTR, HLOCAL

    CommandLineToArgvW = windll.shell32.CommandLineToArgvW
    CommandLineToArgvW.argtypes = [LPCWSTR, POINTER(c_int)]
    CommandLineToArgvW.restype = POINTER(LPWSTR)

    LocalFree = windll.kernel32.LocalFree
    LocalFree.argtypes = [HLOCAL]
    LocalFree.restype = HLOCAL

    argc = c_int(0)
    argv = CommandLineToArgvW(command, byref(argc))
    if not argv:
        # The docs say CommandLineToArgvW returns NULL on error, but they
        # don't describe any possible errors, so who knows when/if this happens.
        # Maybe only on low memory or something?
        raise WindowsCommandLineException("Windows could not parse command line: " + str(command))
    try:
        result = []
        i = 0
        while i < argc.value:
            try:
                result.append(str(argv[i]))
            except UnicodeEncodeError as e:
                message = (
                    "Windows cannot represent this command line in its character encoding: " + command + ": " + str(e))
                raise WindowsCommandLineException(message)
            i += 1
    finally:
        LocalFree(argv)
    return result

项目：anaconda-project 作者：Anaconda-Platform | 项目源码 | 文件源码

def windows_split_command_line(command):
    from ctypes import windll, c_int, POINTER, byref
    from ctypes.wintypes import LPCWSTR, LPWSTR, HLOCAL

    CommandLineToArgvW = windll.shell32.CommandLineToArgvW
    CommandLineToArgvW.argtypes = [LPCWSTR, POINTER(c_int)]
    CommandLineToArgvW.restype = POINTER(LPWSTR)

    LocalFree = windll.kernel32.LocalFree
    LocalFree.argtypes = [HLOCAL]
    LocalFree.restype = HLOCAL

    argc = c_int(0)
    argv = CommandLineToArgvW(command, byref(argc))
    if not argv:
        # The docs say CommandLineToArgvW returns NULL on error, but they
        # don't describe any possible errors, so who knows when/if this happens.
        # Maybe only on low memory or something?
        raise WindowsCommandLineException("Windows could not parse command line: " + str(command))
    try:
        result = []
        i = 0
        while i < argc.value:
            try:
                result.append(str(argv[i]))
            except UnicodeEncodeError as e:
                message = (
                    "Windows cannot represent this command line in its character encoding: " + command + ": " + str(e))
                raise WindowsCommandLineException(message)
            i += 1
    finally:
        LocalFree(argv)
    return result