pathansi.c

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/*
 * PROJECT:         ReactOS Win32 Base API
 * LICENSE:         GPL - See COPYING in the top level directory
 * FILE:            dll/win32/kernel32/client/pathansi.c
 * PURPOSE:         Handles path APIs
 * PROGRAMMERS:     Alex Ionescu (alex.ionescu@reactos.org)
 */
 
/* INCLUDES *******************************************************************/
 
#include <k32.h>
 
/* FUNCTIONS ******************************************************************/
 
/*
 * @implemented
 */
DWORD
WINAPI
GetShortPathNameA(IN LPCSTR lpszLongPath,
                  OUT LPSTR lpszShortPath,
                  IN DWORD cchBuffer)
{
    ULONG Result, PathLength;
    PWCHAR ShortPath;
    NTSTATUS Status;
    UNICODE_STRING LongPathUni, ShortPathUni;
    ANSI_STRING ShortPathAnsi;
    WCHAR ShortPathBuffer[MAX_PATH];
 
    ShortPath = NULL;
    ShortPathAnsi.Buffer = NULL;
    LongPathUni.Buffer = NULL;
    Result = 0;
 
    if (!lpszLongPath)
    {
        SetLastError(ERROR_INVALID_PARAMETER);
        return 0;
    }
 
    Status = Basep8BitStringToDynamicUnicodeString(&LongPathUni, lpszLongPath);
    if (!NT_SUCCESS(Status)) goto Quickie;
 
    ShortPath = ShortPathBuffer;
 
    PathLength = GetShortPathNameW(LongPathUni.Buffer, ShortPathBuffer, MAX_PATH);
    if (PathLength >= MAX_PATH)
    {
        ShortPath = RtlAllocateHeap(RtlGetProcessHeap(), 0, PathLength * sizeof(WCHAR));
        if (!ShortPath)
        {
            PathLength = 0;
            SetLastError(ERROR_NOT_ENOUGH_MEMORY);
        }
        else
        {
            PathLength = GetShortPathNameW(LongPathUni.Buffer, ShortPath, PathLength);
        }
    }
 
    if (!PathLength) goto Quickie;
 
    LongPathUni.MaximumLength = (USHORT)PathLength * sizeof(WCHAR) + sizeof(UNICODE_NULL);
    ShortPathUni.Buffer = ShortPath;
    ShortPathUni.Length = (USHORT)PathLength * sizeof(WCHAR);
 
    Status = BasepUnicodeStringTo8BitString(&ShortPathAnsi, &ShortPathUni, TRUE);
    if (!NT_SUCCESS(Status))
    {
        BaseSetLastNTError(Status);
        Result = 0;
    }
 
    Result = ShortPathAnsi.Length;
    if ((lpszShortPath) && (cchBuffer > ShortPathAnsi.Length))
    {
        RtlMoveMemory(lpszShortPath, ShortPathAnsi.Buffer, ShortPathAnsi.Length);
        lpszShortPath[Result] = ANSI_NULL;
    }
    else
    {
        Result = ShortPathAnsi.Length + sizeof(ANSI_NULL);
    }
 
Quickie:
    if (LongPathUni.Buffer) RtlFreeUnicodeString(&LongPathUni);
    if (ShortPathAnsi.Buffer) RtlFreeAnsiString(&ShortPathAnsi);
    if ((ShortPath) && (ShortPath != ShortPathBuffer))
    {
        RtlFreeHeap(RtlGetProcessHeap(), 0, ShortPath);
    }
    return Result;
}
 
/* EOF */