static STRSAFEAPI WilStringVPrintfWorkerA()

in include/wil/result_macros.h [2126:2177]

• 40 lines of code
• 5 McCabe index (conditional complexity)

        static STRSAFEAPI WilStringVPrintfWorkerA(_Out_writes_(cchDest) _Always_(_Post_z_) STRSAFE_LPSTR pszDest, _In_ _In_range_(1, STRSAFE_MAX_CCH) size_t cchDest, _Always_(_Out_opt_ _Deref_out_range_(<=, cchDest - 1)) size_t* pcchNewDestLength, _In_ _Printf_format_string_ STRSAFE_LPCSTR pszFormat, _In_ va_list argList)
        {
            HRESULT hr = S_OK;
            int iRet;
            size_t cchMax;
            size_t cchNewDestLength = 0;

            // leave the last space for the null terminator
            cchMax = cchDest - 1;
#undef STRSAFE_USE_SECURE_CRT
#define STRSAFE_USE_SECURE_CRT 1
        #if (STRSAFE_USE_SECURE_CRT == 1) && !defined(STRSAFE_LIB_IMPL)
            iRet = _vsnprintf_s(pszDest, cchDest, cchMax, pszFormat, argList);
        #else
        #pragma warning(push)
        #pragma warning(disable: __WARNING_BANNED_API_USAGE)// "STRSAFE not included"
            iRet = _vsnprintf(pszDest, cchMax, pszFormat, argList);
        #pragma warning(pop)
        #endif
            // ASSERT((iRet < 0) || (((size_t)iRet) <= cchMax));

            if ((iRet < 0) || (((size_t)iRet) > cchMax))
            {
                // need to null terminate the string
                pszDest += cchMax;
                *pszDest = '\0';

                cchNewDestLength = cchMax;

                // we have truncated pszDest
                hr = STRSAFE_E_INSUFFICIENT_BUFFER;
            }
            else if (((size_t)iRet) == cchMax)
            {
                // need to null terminate the string
                pszDest += cchMax;
                *pszDest = '\0';

                cchNewDestLength = cchMax;
            }
            else
            {
                cchNewDestLength = (size_t)iRet;
            }

            if (pcchNewDestLength)
            {
                *pcchNewDestLength = cchNewDestLength;
            }

            return hr;
        }