wcstombs_nt.c

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#define WIN32_NO_STATUS
#include <windows.h>
#include <ndk/umtypes.h>
#include <ndk/rtlfuncs.h>

/*
 * @implemented
 */
int wctomb (char *mbchar, wchar_t wchar)
{
    NTSTATUS Status;
    ULONG Size;

    if (mbchar == NULL)
        return 0;

    Status = RtlUnicodeToMultiByteN (mbchar,
                                     1,
                                     &Size,
                                     &wchar,
                                     sizeof(WCHAR));
    if (!NT_SUCCESS(Status))
        return -1;

    return (int)Size;
}

/*
 * @implemented
 */
size_t wcstombs (char *mbstr, const wchar_t *wcstr, size_t count)
{
    NTSTATUS Status;
    ULONG Size;
    ULONG Length;

    Length = (ULONG)wcslen (wcstr);

    if (mbstr == NULL)
    {
        RtlUnicodeToMultiByteSize (&Size,
                                   (wchar_t*)((size_t)wcstr),
                                   Length * sizeof(WCHAR));

        return (size_t)Size;
    }

    Status = RtlUnicodeToMultiByteN (mbstr,
                                     (ULONG)count,
                                     &Size,
                                     (wchar_t*)((size_t)wcstr),
                                     Length * sizeof(WCHAR));
    if (!NT_SUCCESS(Status))
        return -1;

    return (size_t)Size;
}

/* EOF */