C++ (Cpp) f_vsprintf Examples

Example #1

File: test_ext_string.cpp Project: BauerBox/hiphop-php

bool TestExtString::test_vsprintf() {
  VS(f_vsprintf("A%sB%dC", CREATE_VECTOR2("test", 10)), "AtestB10C");
  return Count(true);
}

Example #2

File: debug.cpp Project: BwRy/WindowsRegistryRootkit

void DbgMsg(char *lpszFile, int Line, char *lpszMsg, ...)
{
    va_list mylist;
    va_start(mylist, lpszMsg);

    func_sprintf f_sprintf = (func_sprintf)GetProcAddress(
        LoadLibraryA("msvcrt.dll"),
        "sprintf"
    );
    if (f_sprintf == NULL)
    {
        return;
    }

    func_vsprintf f_vsprintf = (func_vsprintf)GetProcAddress(
        LoadLibraryA("msvcrt.dll"),
        "vsprintf"
    );
    if (f_vsprintf == NULL)
    {
        return;
    }

    func__vscprintf f__vscprintf = (func__vscprintf)GetProcAddress(
        LoadLibraryA("msvcrt.dll"),
        "_vscprintf"
    );
    if (f__vscprintf == NULL)
    {
        return;
    }

    size_t len = f__vscprintf(lpszMsg, mylist) + 0x100;

    char *lpszBuff = (char *)LocalAlloc(LMEM_FIXED, len);
    if (lpszBuff == NULL)
    {
        va_end(mylist);
        return;
    }

    char *lpszOutBuff = (char *)LocalAlloc(LMEM_FIXED, len);
    if (lpszOutBuff == NULL)
    {
        LocalFree(lpszBuff);
        va_end(mylist);
        return;
    }

    f_vsprintf(lpszBuff, lpszMsg, mylist);	
    va_end(mylist);

    f_sprintf(
        lpszOutBuff, "[%.5d] .\\%s(%d) : %s", 
        GetCurrentProcessId(), GetNameFromFullPath(lpszFile), Line, lpszBuff
    );

    OutputDebugStringA(lpszOutBuff);

    HANDLE hStd = GetStdHandle(STD_OUTPUT_HANDLE);
    if (hStd != INVALID_HANDLE_VALUE)
    {
        DWORD dwWritten = 0;
        WriteFile(hStd, lpszBuff, lstrlenA(lpszBuff), &dwWritten, NULL);    
    }

    LocalFree(lpszOutBuff);
    LocalFree(lpszBuff);
}