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allendowney
GitHub Repository: allendowney/cpython
 Path: blob/main/Include/internal/pycore_fileutils_windows.h
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#ifndef Py_INTERNAL_FILEUTILS_WINDOWS_H

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#define Py_INTERNAL_FILEUTILS_WINDOWS_H

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#ifdef __cplusplus

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extern "C" {

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#endif

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#ifndef Py_BUILD_CORE

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#  error "Py_BUILD_CORE must be defined to include this header"

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#endif

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#ifdef MS_WINDOWS

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#if !defined(NTDDI_WIN10_NI) || !(NTDDI_VERSION >= NTDDI_WIN10_NI)

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typedef struct _FILE_STAT_BASIC_INFORMATION {

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    LARGE_INTEGER FileId;

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    LARGE_INTEGER CreationTime;

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    LARGE_INTEGER LastAccessTime;

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    LARGE_INTEGER LastWriteTime;

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    LARGE_INTEGER ChangeTime;

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    LARGE_INTEGER AllocationSize;

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    LARGE_INTEGER EndOfFile;

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    ULONG FileAttributes;

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    ULONG ReparseTag;

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    ULONG NumberOfLinks;

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    ULONG DeviceType;

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    ULONG DeviceCharacteristics;

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    ULONG Reserved;

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    LARGE_INTEGER VolumeSerialNumber;

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    FILE_ID_128 FileId128;

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} FILE_STAT_BASIC_INFORMATION;

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typedef enum _FILE_INFO_BY_NAME_CLASS {

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    FileStatByNameInfo,

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    FileStatLxByNameInfo,

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    FileCaseSensitiveByNameInfo,

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    FileStatBasicByNameInfo,

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    MaximumFileInfoByNameClass

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} FILE_INFO_BY_NAME_CLASS;

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#endif

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typedef BOOL (WINAPI *PGetFileInformationByName)(

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    PCWSTR FileName,

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    FILE_INFO_BY_NAME_CLASS FileInformationClass,

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    PVOID FileInfoBuffer,

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    ULONG FileInfoBufferSize

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);

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static inline BOOL _Py_GetFileInformationByName(

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    PCWSTR FileName,

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    FILE_INFO_BY_NAME_CLASS FileInformationClass,

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    PVOID FileInfoBuffer,

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    ULONG FileInfoBufferSize

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) {

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    static PGetFileInformationByName GetFileInformationByName = NULL;

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    static int GetFileInformationByName_init = -1;

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    if (GetFileInformationByName_init < 0) {

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        HMODULE hMod = LoadLibraryW(L"api-ms-win-core-file-l2-1-4");

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        GetFileInformationByName_init = 0;

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        if (hMod) {

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            GetFileInformationByName = (PGetFileInformationByName)GetProcAddress(

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                hMod, "GetFileInformationByName");

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            if (GetFileInformationByName) {

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                GetFileInformationByName_init = 1;

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            } else {

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                FreeLibrary(hMod);

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            }

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        }

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    }

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    if (GetFileInformationByName_init <= 0) {

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        SetLastError(ERROR_NOT_SUPPORTED);

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        return FALSE;

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    }

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    return GetFileInformationByName(FileName, FileInformationClass, FileInfoBuffer, FileInfoBufferSize);

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}

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static inline BOOL _Py_GetFileInformationByName_ErrorIsTrustworthy(int error)

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{

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    switch(error) {

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        case ERROR_FILE_NOT_FOUND:

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        case ERROR_PATH_NOT_FOUND:

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        case ERROR_NOT_READY:

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        case ERROR_BAD_NET_NAME:

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        case ERROR_BAD_NETPATH:

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        case ERROR_BAD_PATHNAME:

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        case ERROR_INVALID_NAME:

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        case ERROR_FILENAME_EXCED_RANGE:

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            return TRUE;

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        case ERROR_NOT_SUPPORTED:

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            return FALSE;

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    }

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    return FALSE;

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}

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#endif

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#endif

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