printf_stubs.c

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/*
 * PROJECT:     ReactOS kernel-mode tests
 * LICENSE:     LGPL-2.1+ (https://spdx.org/licenses/LGPL-2.1+)
 * PURPOSE:     Kernel-Mode Test Suite stub functions for any-IRQL vsnprintf
 * COPYRIGHT:   Copyright 2011-2018 Thomas Faber <thomas.faber@reactos.org>
 */
 
#undef wctomb
#include <stdarg.h>
#include <stdio.h>
#include <wchar.h>
 
int __cdecl KmtWcToMb(char *mbchar, wchar_t wchar)
{
    *mbchar = (char)wchar;
    return 1;
}
 
int __cdecl streamout(FILE *stream, const char *format, va_list argptr);
 
int __cdecl KmtVSNPrintF(char *buffer, size_t count, const char *format, va_list argptr)
{
    int result;
    FILE stream;
 
    stream._base = (char *)buffer;
    stream._ptr = stream._base;
    stream._charbuf = 0;
    stream._cnt = (int)count;
    stream._bufsiz = 0;
    stream._flag = _IOSTRG | _IOWRT;
    stream._tmpfname = 0;
 
    result = streamout(&stream, format, argptr);
 
    /* Only zero terminate if there is enough space left */
    if (stream._cnt) *(char *)stream._ptr = '\0';
 
    return result;
}