Ejemplo n.º 1
0
static HRESULT WINAPI convert_DataConvert(IDataConvert* iface,
                                          DBTYPE src_type, DBTYPE dst_type,
                                          DBLENGTH src_len, DBLENGTH *dst_len,
                                          void *src, void *dst,
                                          DBLENGTH dst_max_len,
                                          DBSTATUS src_status, DBSTATUS *dst_status,
                                          BYTE precision, BYTE scale,
                                          DBDATACONVERT flags)
{
    convert *This = impl_from_IDataConvert(iface);
    HRESULT hr;

    TRACE("(%p)->(%d, %d, %ld, %p, %p, %p, %ld, %d, %p, %d, %d, %x)\n", This,
          src_type, dst_type, src_len, dst_len, src, dst, dst_max_len,
          src_status, dst_status, precision, scale, flags);

    *dst_status = DBSTATUS_E_BADACCESSOR;

    if(IDataConvert_CanConvert(iface, src_type, dst_type) != S_OK)
    {
        return DB_E_UNSUPPORTEDCONVERSION;
    }

    if(src_type == DBTYPE_STR)
    {
        BSTR b;
        DWORD len;

        if(flags & DBDATACONVERT_LENGTHFROMNTS)
            len = MultiByteToWideChar(CP_ACP, 0, src, -1, NULL, 0) - 1;
        else
            len = MultiByteToWideChar(CP_ACP, 0, src, src_len, NULL, 0);
        b = SysAllocStringLen(NULL, len);
        if(!b) return E_OUTOFMEMORY;
        if(flags & DBDATACONVERT_LENGTHFROMNTS)
            MultiByteToWideChar(CP_ACP, 0, src, -1, b, len + 1);
        else
            MultiByteToWideChar(CP_ACP, 0, src, src_len, b, len);

        hr = IDataConvert_DataConvert(iface, DBTYPE_BSTR, dst_type, 0, dst_len,
                                      &b, dst, dst_max_len, src_status, dst_status,
                                      precision, scale, flags);

        SysFreeString(b);
        return hr;
    }

    if(src_type == DBTYPE_WSTR)
    {
        BSTR b;

        if(flags & DBDATACONVERT_LENGTHFROMNTS)
            b = SysAllocString(src);
        else
            b = SysAllocStringLen(src, src_len / 2);
        if(!b) return E_OUTOFMEMORY;
        hr = IDataConvert_DataConvert(iface, DBTYPE_BSTR, dst_type, 0, dst_len,
                                      &b, dst, dst_max_len, src_status, dst_status,
                                      precision, scale, flags);
        SysFreeString(b);
        return hr;
    }

    switch(dst_type)
    {
    case DBTYPE_I2:
    {
        signed short *d = dst;
        VARIANT tmp;
        switch(src_type)
        {
        case DBTYPE_EMPTY:       *d = 0; hr = S_OK;                              break;
        case DBTYPE_I2:          *d = *(signed short*)src; hr = S_OK;            break;
        case DBTYPE_I4:          hr = VarI2FromI4(*(signed int*)src, d);         break;
        case DBTYPE_R4:          hr = VarI2FromR4(*(FLOAT*)src, d);              break;
        case DBTYPE_R8:          hr = VarI2FromR8(*(double*)src, d);             break;
        case DBTYPE_CY:          hr = VarI2FromCy(*(CY*)src, d);                 break;
        case DBTYPE_DATE:        hr = VarI2FromDate(*(DATE*)src, d);             break;
        case DBTYPE_BSTR:        hr = VarI2FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
        case DBTYPE_BOOL:        hr = VarI2FromBool(*(VARIANT_BOOL*)src, d);     break;
        case DBTYPE_DECIMAL:     hr = VarI2FromDec((DECIMAL*)src, d);            break;
        case DBTYPE_I1:          hr = VarI2FromI1(*(signed char*)src, d);        break;
        case DBTYPE_UI1:         hr = VarI2FromUI1(*(BYTE*)src, d);              break;
        case DBTYPE_UI2:         hr = VarI2FromUI2(*(WORD*)src, d);              break;
        case DBTYPE_UI4:         hr = VarI2FromUI4(*(DWORD*)src, d);             break;
        case DBTYPE_I8:          hr = VarI2FromI8(*(LONGLONG*)src, d);           break;
        case DBTYPE_UI8:         hr = VarI2FromUI8(*(ULONGLONG*)src, d);         break;
        case DBTYPE_VARIANT:
            VariantInit(&tmp);
            if ((hr = VariantChangeType(&tmp, (VARIANT*)src, 0, VT_I2)) == S_OK)
                *d = V_I2(&tmp);
            break;
        default: FIXME("Unimplemented conversion %04x -> I2\n", src_type); return E_NOTIMPL;
        }
        break;
    }

    case DBTYPE_I4:
    {
        signed int *d = dst;
        VARIANT tmp;
        switch(src_type)
        {
        case DBTYPE_EMPTY:       *d = 0; hr = S_OK;                              break;
        case DBTYPE_I2:          hr = VarI4FromI2(*(signed short*)src, d);       break;
        case DBTYPE_I4:          *d = *(signed int*)src; hr = S_OK;              break;
        case DBTYPE_R4:          hr = VarI4FromR4(*(FLOAT*)src, d);              break;
        case DBTYPE_R8:          hr = VarI4FromR8(*(double*)src, d);             break;
        case DBTYPE_CY:          hr = VarI4FromCy(*(CY*)src, d);                 break;
        case DBTYPE_DATE:        hr = VarI4FromDate(*(DATE*)src, d);             break;
        case DBTYPE_BSTR:        hr = VarI4FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
        case DBTYPE_BOOL:        hr = VarI4FromBool(*(VARIANT_BOOL*)src, d);     break;
        case DBTYPE_DECIMAL:     hr = VarI4FromDec((DECIMAL*)src, d);            break;
        case DBTYPE_I1:          hr = VarI4FromI1(*(signed char*)src, d);        break;
        case DBTYPE_UI1:         hr = VarI4FromUI1(*(BYTE*)src, d);              break;
        case DBTYPE_UI2:         hr = VarI4FromUI2(*(WORD*)src, d);              break;
        case DBTYPE_UI4:         hr = VarI4FromUI4(*(DWORD*)src, d);             break;
        case DBTYPE_I8:          hr = VarI4FromI8(*(LONGLONG*)src, d);           break;
        case DBTYPE_UI8:         hr = VarI4FromUI8(*(ULONGLONG*)src, d);         break;
        case DBTYPE_VARIANT:
            VariantInit(&tmp);
            if ((hr = VariantChangeType(&tmp, (VARIANT*)src, 0, VT_I4)) == S_OK)
                *d = V_I4(&tmp);
            break;
        default: FIXME("Unimplemented conversion %04x -> I4\n", src_type); return E_NOTIMPL;
        }
        break;
    }

    case DBTYPE_R4:
    {
        FLOAT *d = dst;
        switch(src_type)
        {
        case DBTYPE_EMPTY:       *d = 0; hr = S_OK;                              break;
        case DBTYPE_I2:          hr = VarR4FromI2(*(signed short*)src, d);       break;
        case DBTYPE_I4:          hr = VarR4FromI4(*(signed int*)src, d);         break;
        case DBTYPE_R4:          *d = *(FLOAT*)src; hr = S_OK;                   break;
        case DBTYPE_R8:          hr = VarR4FromR8(*(double*)src, d);             break;
        case DBTYPE_CY:          hr = VarR4FromCy(*(CY*)src, d);                 break;
        case DBTYPE_DATE:        hr = VarR4FromDate(*(DATE*)src, d);             break;
        case DBTYPE_BSTR:        hr = VarR4FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
        case DBTYPE_BOOL:        hr = VarR4FromBool(*(VARIANT_BOOL*)src, d);     break;
        case DBTYPE_DECIMAL:     hr = VarR4FromDec((DECIMAL*)src, d);            break;
        case DBTYPE_I1:          hr = VarR4FromI1(*(signed char*)src, d);        break;
        case DBTYPE_UI1:         hr = VarR4FromUI1(*(BYTE*)src, d);              break;
        case DBTYPE_UI2:         hr = VarR4FromUI2(*(WORD*)src, d);              break;
        case DBTYPE_UI4:         hr = VarR4FromUI4(*(DWORD*)src, d);             break;
        case DBTYPE_I8:          hr = VarR4FromI8(*(LONGLONG*)src, d);           break;
        case DBTYPE_UI8:         hr = VarR4FromUI8(*(ULONGLONG*)src, d);         break;
        default: FIXME("Unimplemented conversion %04x -> R4\n", src_type); return E_NOTIMPL;
        }
        break;
    }
    case DBTYPE_R8:
    {
        DOUBLE *d=dst;
        switch (src_type)
        {
        case DBTYPE_EMPTY:      *d = 0; hr = S_OK;                               break;
        case DBTYPE_I1:          hr = VarR8FromI1(*(signed char*)src, d);        break;
        case DBTYPE_I2:          hr = VarR8FromI2(*(signed short*)src, d);       break;
        case DBTYPE_I4:          hr = VarR8FromI4(*(signed int*)src, d);         break;
        case DBTYPE_I8:          hr = VarR8FromI8(*(LONGLONG*)src, d);           break;
        case DBTYPE_UI1:         hr = VarR8FromUI1(*(BYTE*)src, d);              break;
        case DBTYPE_UI2:         hr = VarR8FromUI2(*(WORD*)src, d);              break;
        case DBTYPE_UI4:         hr = VarR8FromUI4(*(DWORD*)src, d);             break;
        case DBTYPE_UI8:         hr = VarR8FromUI8(*(ULONGLONG*)src, d);         break;
        case DBTYPE_R4:          hr = VarR8FromR4(*(FLOAT*)src, d);              break;
        case DBTYPE_R8:          *d = *(DOUBLE*)src; hr = S_OK;                  break;
        case DBTYPE_CY:          hr = VarR8FromCy(*(CY*)src, d);                 break;
        case DBTYPE_DATE:        hr = VarR8FromDate(*(DATE*)src, d);             break;
        case DBTYPE_BSTR:        hr = VarR8FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
        case DBTYPE_BOOL:        hr = VarR8FromBool(*(VARIANT_BOOL*)src, d);     break;
        case DBTYPE_DECIMAL:     hr = VarR8FromDec((DECIMAL*)src, d);            break;
        default: FIXME("Unimplemented conversion %04x -> R8\n", src_type); return E_NOTIMPL;
        }
        break;
    }
    case DBTYPE_BOOL:
    {
        VARIANT_BOOL *d=dst;
        switch (src_type)
        {
        case DBTYPE_EMPTY:      *d = 0; hr = S_OK;                               break;
        case DBTYPE_I1:          hr = VarBoolFromI1(*(signed char*)src, d);      break;
        case DBTYPE_I2:          hr = VarBoolFromI2(*(signed short*)src, d);     break;
        case DBTYPE_I4:          hr = VarBoolFromI4(*(signed int*)src, d);       break;
        case DBTYPE_I8:          hr = VarBoolFromI8(*(LONGLONG*)src, d);         break;
        case DBTYPE_UI1:         hr = VarBoolFromUI1(*(BYTE*)src, d);            break;
        case DBTYPE_UI2:         hr = VarBoolFromUI2(*(WORD*)src, d);            break;
        case DBTYPE_UI4:         hr = VarBoolFromUI4(*(DWORD*)src, d);           break;
        case DBTYPE_UI8:         hr = VarBoolFromUI8(*(ULONGLONG*)src, d);       break;
        case DBTYPE_R4:          hr = VarBoolFromR4(*(FLOAT*)src, d);            break;
        case DBTYPE_R8:          hr = VarBoolFromR8(*(DOUBLE*)src, d);           break;
        case DBTYPE_CY:          hr = VarBoolFromCy(*(CY*)src, d);               break;
        case DBTYPE_DATE:        hr = VarBoolFromDate(*(DATE*)src, d);           break;
        case DBTYPE_BSTR:        hr = VarBoolFromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
        case DBTYPE_BOOL:        *d = *(VARIANT_BOOL*)src; hr = S_OK;            break;
        case DBTYPE_DECIMAL:     hr = VarBoolFromDec((DECIMAL*)src, d);          break;
        default: FIXME("Unimplemented conversion %04x -> BOOL\n", src_type); return E_NOTIMPL;
        }
        break;
    }
    case DBTYPE_DATE:
    {
        DATE *d=dst;
        switch (src_type)
        {
        case DBTYPE_EMPTY:      *d = 0; hr = S_OK;                           	 break;
        case DBTYPE_I1:          hr = VarDateFromI1(*(signed char*)src, d);      break;
        case DBTYPE_I2:          hr = VarDateFromI2(*(signed short*)src, d);     break;
        case DBTYPE_I4:          hr = VarDateFromI4(*(signed int*)src, d);       break;
        case DBTYPE_I8:          hr = VarDateFromI8(*(LONGLONG*)src, d);         break;
        case DBTYPE_UI1:         hr = VarDateFromUI1(*(BYTE*)src, d);            break;
        case DBTYPE_UI2:         hr = VarDateFromUI2(*(WORD*)src, d);            break;
        case DBTYPE_UI4:         hr = VarDateFromUI4(*(DWORD*)src, d);           break;
        case DBTYPE_UI8:         hr = VarDateFromUI8(*(ULONGLONG*)src, d);       break;
        case DBTYPE_R4:          hr = VarDateFromR4(*(FLOAT*)src, d);            break;
        case DBTYPE_R8:          hr = VarDateFromR8(*(DOUBLE*)src, d);           break;
        case DBTYPE_CY:          hr = VarDateFromCy(*(CY*)src, d);               break;
        case DBTYPE_DATE:       *d = *(DATE*)src;      hr = S_OK;                break;
        case DBTYPE_BSTR:        hr = VarDateFromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
        case DBTYPE_BOOL:        hr = VarDateFromBool(*(VARIANT_BOOL*)src, d);   break;
        case DBTYPE_DECIMAL:     hr = VarDateFromDec((DECIMAL*)src, d);          break;
        case DBTYPE_DBTIMESTAMP:
        {
            SYSTEMTIME st;
            DBTIMESTAMP *ts=(DBTIMESTAMP*)src;

            st.wYear = ts->year;
            st.wMonth = ts->month;
            st.wDay = ts->day;
            st.wHour = ts->hour;
            st.wMinute = ts->minute;
            st.wSecond = ts->second;
            st.wMilliseconds = ts->fraction/1000000;
            hr = (SystemTimeToVariantTime(&st, d) ? S_OK : E_FAIL);
            break;
        }
        default: FIXME("Unimplemented conversion %04x -> DATE\n", src_type); return E_NOTIMPL;
        }
        break;
    }
    case DBTYPE_DBTIMESTAMP:
    {
        DBTIMESTAMP *d=dst;
        switch (src_type)
        {
	case DBTYPE_EMPTY:       memset(d, 0, sizeof(DBTIMESTAMP));    hr = S_OK; break;
	case DBTYPE_DBTIMESTAMP: memcpy(d, src, sizeof(DBTIMESTAMP));  hr = S_OK; break;
        case DBTYPE_DATE:
        {
            SYSTEMTIME st;
            hr = (VariantTimeToSystemTime(*(double*)src, &st) ? S_OK : E_FAIL);
            d->year = st.wYear;
            d->month = st.wMonth;
            d->day = st.wDay;
            d->hour = st.wHour;
            d->minute = st.wMinute;
            d->second = st.wSecond;
            d->fraction = st.wMilliseconds * 1000000;
            break;
        }
        default: FIXME("Unimplemented conversion %04x -> DBTIMESTAMP\n", src_type); return E_NOTIMPL;
        }
        break;
    }

    case DBTYPE_CY:
    {
        CY *d = dst;
        switch(src_type)
        {
        case DBTYPE_EMPTY:       d->int64 = 0; hr = S_OK;                              break;
        case DBTYPE_I2:          hr = VarCyFromI2(*(signed short*)src, d);       break;
        case DBTYPE_I4:          hr = VarCyFromI4(*(signed int*)src, d);         break;
        case DBTYPE_R4:          hr = VarCyFromR4(*(FLOAT*)src, d);              break;
        case DBTYPE_R8:          hr = VarCyFromR8(*(double*)src, d);             break;
        case DBTYPE_CY:          *d = *(CY*)src; hr = S_OK;                      break;
        case DBTYPE_DATE:        hr = VarCyFromDate(*(DATE*)src, d);             break;
        case DBTYPE_BSTR:        hr = VarCyFromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
        case DBTYPE_BOOL:        hr = VarCyFromBool(*(VARIANT_BOOL*)src, d);     break;
        case DBTYPE_DECIMAL:     hr = VarCyFromDec((DECIMAL*)src, d);            break;
        case DBTYPE_I1:          hr = VarCyFromI1(*(signed char*)src, d);        break;
        case DBTYPE_UI1:         hr = VarCyFromUI1(*(BYTE*)src, d);              break;
        case DBTYPE_UI2:         hr = VarCyFromUI2(*(WORD*)src, d);              break;
        case DBTYPE_UI4:         hr = VarCyFromUI4(*(DWORD*)src, d);             break;
        case DBTYPE_I8:          hr = VarCyFromI8(*(LONGLONG*)src, d);           break;
        case DBTYPE_UI8:         hr = VarCyFromUI8(*(ULONGLONG*)src, d);         break;
        default: FIXME("Unimplemented conversion %04x -> CY\n", src_type); return E_NOTIMPL;
        }
        break;
    }

    case DBTYPE_BSTR:
    {
        BSTR *d = dst;
        switch(src_type)
        {
        case DBTYPE_EMPTY:       *d = SysAllocStringLen(NULL, 0); hr = *d ? S_OK : E_OUTOFMEMORY;      break;
        case DBTYPE_I2:          hr = VarBstrFromI2(*(signed short*)src, LOCALE_USER_DEFAULT, 0, d);   break;
        case DBTYPE_I4:          hr = VarBstrFromI4(*(signed int*)src, LOCALE_USER_DEFAULT, 0, d);     break;
        case DBTYPE_R4:          hr = VarBstrFromR4(*(FLOAT*)src, LOCALE_USER_DEFAULT, 0, d);          break;
        case DBTYPE_R8:          hr = VarBstrFromR8(*(double*)src, LOCALE_USER_DEFAULT, 0, d);         break;
        case DBTYPE_CY:          hr = VarBstrFromCy(*(CY*)src, LOCALE_USER_DEFAULT, 0, d);             break;
        case DBTYPE_DATE:        hr = VarBstrFromDate(*(DATE*)src, LOCALE_USER_DEFAULT, 0, d);         break;
        case DBTYPE_BSTR:        *d = SysAllocStringLen(*(BSTR*)src, SysStringLen(*(BSTR*)src)); hr = *d ? S_OK : E_OUTOFMEMORY;     break;
        case DBTYPE_BOOL:        hr = VarBstrFromBool(*(VARIANT_BOOL*)src, LOCALE_USER_DEFAULT, 0, d); break;
        case DBTYPE_DECIMAL:     hr = VarBstrFromDec((DECIMAL*)src, LOCALE_USER_DEFAULT, 0, d);        break;
        case DBTYPE_I1:          hr = VarBstrFromI1(*(signed char*)src, LOCALE_USER_DEFAULT, 0, d);    break;
        case DBTYPE_UI1:         hr = VarBstrFromUI1(*(BYTE*)src, LOCALE_USER_DEFAULT, 0, d);          break;
        case DBTYPE_UI2:         hr = VarBstrFromUI2(*(WORD*)src, LOCALE_USER_DEFAULT, 0, d);          break;
        case DBTYPE_UI4:         hr = VarBstrFromUI4(*(DWORD*)src, LOCALE_USER_DEFAULT, 0, d);         break;
        case DBTYPE_I8:          hr = VarBstrFromI8(*(LONGLONG*)src, LOCALE_USER_DEFAULT, 0, d);       break;
        case DBTYPE_UI8:         hr = VarBstrFromUI8(*(ULONGLONG*)src, LOCALE_USER_DEFAULT, 0, d);     break;
        case DBTYPE_GUID:
        {
            WCHAR szBuff[39];
            const GUID *id = (const GUID *)src;
            WCHAR format[] = {
                '{','%','0','8','X','-','%','0','4','X','-','%','0','4','X','-',
                '%','0','2','X','%','0','2','X','-',
                '%','0','2','X','%','0','2','X','%','0','2','X','%','0','2','X','%','0','2','X','%','0','2','X','}',0};
            wsprintfW(szBuff, format,
                id->Data1, id->Data2, id->Data3,
                id->Data4[0], id->Data4[1], id->Data4[2], id->Data4[3],
                id->Data4[4], id->Data4[5], id->Data4[6], id->Data4[7] );
            *d = SysAllocString(szBuff);
            hr = *d ? S_OK : E_OUTOFMEMORY;
        }
        break;
        case DBTYPE_BYTES:
        {
            *d = SysAllocStringLen(NULL, 2 * src_len);
            if (*d == NULL)
                hr = E_OUTOFMEMORY;
            else
            {
                const char hexchars[] = "0123456789ABCDEF";
                WCHAR *s = *d;
                unsigned char *p = src;
                while (src_len > 0)
                {
                    *s++ = hexchars[(*p >> 4) & 0x0F];
                    *s++ = hexchars[(*p)      & 0x0F];
                    src_len--; p++;
                }
                hr = S_OK;
            }
        }
        break;
        default: FIXME("Unimplemented conversion %04x -> BSTR\n", src_type); return E_NOTIMPL;
        }
        break;
    }

    case DBTYPE_UI1:
    {
        BYTE *d = dst;
        switch(src_type)
        {
        case DBTYPE_EMPTY:       *d = 0; hr = S_OK;                              break;
        case DBTYPE_I2:          hr = VarUI1FromI2(*(signed short*)src, d);      break;
        case DBTYPE_I4:          hr = VarUI1FromI4(*(signed int*)src, d);        break;
        case DBTYPE_R4:          hr = VarUI1FromR4(*(FLOAT*)src, d);             break;
        case DBTYPE_R8:          hr = VarUI1FromR8(*(double*)src, d);            break;
        case DBTYPE_CY:          hr = VarUI1FromCy(*(CY*)src, d);                break;
        case DBTYPE_DATE:        hr = VarUI1FromDate(*(DATE*)src, d);            break;
        case DBTYPE_BSTR:        hr = VarUI1FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
        case DBTYPE_BOOL:        hr = VarUI1FromBool(*(VARIANT_BOOL*)src, d);    break;
        case DBTYPE_DECIMAL:     hr = VarUI1FromDec((DECIMAL*)src, d);           break;
        case DBTYPE_I1:          hr = VarUI1FromI1(*(signed char*)src, d);       break;
        case DBTYPE_UI1:         *d = *(BYTE*)src; hr = S_OK;                    break;
        case DBTYPE_UI2:         hr = VarUI1FromUI2(*(WORD*)src, d);             break;
        case DBTYPE_UI4:         hr = VarUI1FromUI4(*(DWORD*)src, d);            break;
        case DBTYPE_I8:          hr = VarUI1FromI8(*(LONGLONG*)src, d);          break;
        case DBTYPE_UI8:         hr = VarUI1FromUI8(*(ULONGLONG*)src, d);        break;
        default: FIXME("Unimplemented conversion %04x -> UI1\n", src_type); return E_NOTIMPL;
        }
        break;
    }
    case DBTYPE_UI2:
    {
        WORD *d = dst;
        switch(src_type)
        {
        case DBTYPE_EMPTY:       *d = 0; hr = S_OK;                              break;
        case DBTYPE_I2:          hr = VarUI2FromI2(*(signed short*)src, d);      break;
        case DBTYPE_I4:          hr = VarUI2FromI4(*(signed int*)src, d);        break;
        case DBTYPE_R4:          hr = VarUI2FromR4(*(FLOAT*)src, d);             break;
        case DBTYPE_R8:          hr = VarUI2FromR8(*(double*)src, d);            break;
        case DBTYPE_CY:          hr = VarUI2FromCy(*(CY*)src, d);                break;
        case DBTYPE_DATE:        hr = VarUI2FromDate(*(DATE*)src, d);            break;
        case DBTYPE_BSTR:        hr = VarUI2FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
        case DBTYPE_BOOL:        hr = VarUI2FromBool(*(VARIANT_BOOL*)src, d);    break;
        case DBTYPE_DECIMAL:     hr = VarUI2FromDec((DECIMAL*)src, d);           break;
        case DBTYPE_I1:          hr = VarUI2FromI1(*(signed char*)src, d);       break;
        case DBTYPE_UI1:         hr = VarUI2FromUI1(*(BYTE*)src, d);             break;
        case DBTYPE_UI2:         *d = *(WORD*)src; hr = S_OK;                     break;
        case DBTYPE_UI4:         hr = VarUI2FromUI4(*(DWORD*)src, d);            break;
        case DBTYPE_I8:          hr = VarUI2FromI8(*(LONGLONG*)src, d);          break;
        case DBTYPE_UI8:         hr = VarUI2FromUI8(*(ULONGLONG*)src, d);        break;
        default: FIXME("Unimplemented conversion %04x -> UI2\n", src_type); return E_NOTIMPL;
        }
        break;
    }

    case DBTYPE_UI4:
    {
        DWORD *d = dst;
        switch(src_type)
        {
        case DBTYPE_EMPTY:       *d = 0; hr = S_OK;                              break;
        case DBTYPE_I2:          hr = VarUI4FromI2(*(signed short*)src, d);      break;
        case DBTYPE_I4:          hr = VarUI4FromI4(*(signed int*)src, d);        break;
        case DBTYPE_R4:          hr = VarUI4FromR4(*(FLOAT*)src, d);             break;
        case DBTYPE_R8:          hr = VarUI4FromR8(*(double*)src, d);            break;
        case DBTYPE_CY:          hr = VarUI4FromCy(*(CY*)src, d);                break;
        case DBTYPE_DATE:        hr = VarUI4FromDate(*(DATE*)src, d);            break;
        case DBTYPE_BSTR:        hr = VarUI4FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
        case DBTYPE_BOOL:        hr = VarUI4FromBool(*(VARIANT_BOOL*)src, d);    break;
        case DBTYPE_DECIMAL:     hr = VarUI4FromDec((DECIMAL*)src, d);           break;
        case DBTYPE_I1:          hr = VarUI4FromI1(*(signed char*)src, d);       break;
        case DBTYPE_UI1:         hr = VarUI4FromUI1(*(BYTE*)src, d);             break;
        case DBTYPE_UI2:         hr = VarUI4FromUI2(*(WORD*)src, d);             break;
        case DBTYPE_UI4:         *d = *(DWORD*)src; hr = S_OK;                   break;
        case DBTYPE_I8:          hr = VarUI4FromI8(*(LONGLONG*)src, d);          break;
        case DBTYPE_UI8:         hr = VarUI4FromUI8(*(ULONGLONG*)src, d);        break;
        default: FIXME("Unimplemented conversion %04x -> UI4\n", src_type); return E_NOTIMPL;
        }
        break;
    }

    case DBTYPE_UI8:
    {
        ULONGLONG *d = dst;
        switch(src_type)
        {
        case DBTYPE_EMPTY:       *d = 0; hr = S_OK;                              break;
        case DBTYPE_I2:          hr = VarUI8FromI2(*(signed short*)src, d);      break;
        case DBTYPE_I4:          {LONGLONG s = *(signed int*)src; hr = VarUI8FromI8(s, d);        break;}
        case DBTYPE_R4:          hr = VarUI8FromR4(*(FLOAT*)src, d);             break;
        case DBTYPE_R8:          hr = VarUI8FromR8(*(double*)src, d);            break;
        case DBTYPE_CY:          hr = VarUI8FromCy(*(CY*)src, d);                break;
        case DBTYPE_DATE:        hr = VarUI8FromDate(*(DATE*)src, d);            break;
        case DBTYPE_BSTR:        hr = VarUI8FromStr(*(WCHAR**)src, LOCALE_USER_DEFAULT, 0, d); break;
        case DBTYPE_BOOL:        hr = VarUI8FromBool(*(VARIANT_BOOL*)src, d);    break;
        case DBTYPE_DECIMAL:     hr = VarUI8FromDec((DECIMAL*)src, d);           break;
        case DBTYPE_I1:          hr = VarUI8FromI1(*(signed char*)src, d);       break;
        case DBTYPE_UI1:         hr = VarUI8FromUI1(*(BYTE*)src, d);             break;
        case DBTYPE_UI2:         hr = VarUI8FromUI2(*(WORD*)src, d);             break;
        case DBTYPE_UI4:         hr = VarUI8FromUI4(*(DWORD*)src, d);            break;
        case DBTYPE_I8:          hr = VarUI8FromI8(*(LONGLONG*)src, d);          break;
        case DBTYPE_UI8:         *d = *(ULONGLONG*)src; hr = S_OK;               break;
        default: FIXME("Unimplemented conversion %04x -> UI8\n", src_type); return E_NOTIMPL;
        }
        break;
    }

    case DBTYPE_FILETIME:
    {
        FILETIME *d = dst;
        switch(src_type)
        {
        case DBTYPE_EMPTY:       d->dwLowDateTime = d->dwHighDateTime = 0; hr = S_OK;    break;
        case DBTYPE_FILETIME:    *d = *(FILETIME*)src; hr = S_OK;                        break;
        default: FIXME("Unimplemented conversion %04x -> FILETIME\n", src_type); return E_NOTIMPL;
        }
        break;
    }

    case DBTYPE_GUID:
    {
        GUID *d = dst;
        switch(src_type)
        {
        case DBTYPE_EMPTY:       *d = GUID_NULL; hr = S_OK; break;
        case DBTYPE_GUID:        *d = *(GUID*)src; hr = S_OK; break;
        default: FIXME("Unimplemented conversion %04x -> GUID\n", src_type); return E_NOTIMPL;
        }
        break;
    }

    case DBTYPE_WSTR:
    {
        BSTR b;
        DBLENGTH bstr_len;
        INT bytes_to_copy;
        hr = IDataConvert_DataConvert(iface, src_type, DBTYPE_BSTR, src_len, &bstr_len,
                                      src, &b, sizeof(BSTR), src_status, dst_status,
                                      precision, scale, flags);
        if(hr != S_OK) return hr;
        bstr_len = SysStringLen(b);
        *dst_len = bstr_len * sizeof(WCHAR); /* Doesn't include size for '\0' */
        *dst_status = DBSTATUS_S_OK;
        bytes_to_copy = min(*dst_len + sizeof(WCHAR), dst_max_len);
        if(dst)
        {
            if(bytes_to_copy >= sizeof(WCHAR))
            {
                memcpy(dst, b, bytes_to_copy - sizeof(WCHAR));
                *((WCHAR*)dst + bytes_to_copy / sizeof(WCHAR) - 1) = 0;
                if(bytes_to_copy < *dst_len + sizeof(WCHAR))
                    *dst_status = DBSTATUS_S_TRUNCATED;
            }
            else
            {
                *dst_status = DBSTATUS_E_DATAOVERFLOW;
                hr = DB_E_ERRORSOCCURRED;
            }
        }
        SysFreeString(b);
        return hr;
    }
    case DBTYPE_STR:
    {
        BSTR b;
        DBLENGTH bstr_len;
        INT bytes_to_copy;
        hr = IDataConvert_DataConvert(iface, src_type, DBTYPE_BSTR, src_len, &bstr_len,
                                      src, &b, sizeof(BSTR), src_status, dst_status,
                                      precision, scale, flags);
        if(hr != S_OK) return hr;
        bstr_len = SysStringLen(b);
        *dst_len = bstr_len * sizeof(char); /* Doesn't include size for '\0' */
        *dst_status = DBSTATUS_S_OK;
        bytes_to_copy = min(*dst_len + sizeof(char), dst_max_len);
        if(dst)
        {
            if(bytes_to_copy >= sizeof(char))
            {
                WideCharToMultiByte(CP_ACP, 0, b, bytes_to_copy - sizeof(char), dst, dst_max_len, NULL, NULL);
                *((char *)dst + bytes_to_copy / sizeof(char) - 1) = 0;
                if(bytes_to_copy < *dst_len + sizeof(char))
                    *dst_status = DBSTATUS_S_TRUNCATED;
            }
            else
            {
                *dst_status = DBSTATUS_E_DATAOVERFLOW;
                hr = DB_E_ERRORSOCCURRED;
            }
        }
        SysFreeString(b);
        return hr;
    }

    case DBTYPE_BYREF | DBTYPE_WSTR:
    {
        BSTR b;
        WCHAR **d = dst;
        DBLENGTH bstr_len;
        hr = IDataConvert_DataConvert(iface, src_type, DBTYPE_BSTR, src_len, &bstr_len,
                                      src, &b, sizeof(BSTR), src_status, dst_status,
                                      precision, scale, flags);
        if(hr != S_OK) return hr;

        bstr_len = SysStringLen(b) * sizeof(WCHAR);
        *dst_len = bstr_len; /* Doesn't include size for '\0' */

        *d = CoTaskMemAlloc(bstr_len + sizeof(WCHAR));
        if(*d) memcpy(*d, b, bstr_len + sizeof(WCHAR));
        else hr = E_OUTOFMEMORY;
        SysFreeString(b);
        return hr;
    }

    default:
        FIXME("Unimplemented conversion %04x -> %04x\n", src_type, dst_type);
        return E_NOTIMPL;

    }

    if(hr == DISP_E_OVERFLOW)
    {
        *dst_status = DBSTATUS_E_DATAOVERFLOW;
        *dst_len = get_length(dst_type);
        hr = DB_E_ERRORSOCCURRED;
    }
    else if(hr == S_OK)
    {
        *dst_status = DBSTATUS_S_OK;
        *dst_len = get_length(dst_type);
    }

    return hr;
}
Ejemplo n.º 2
0
STDAPI
VariantChangeType(
    VARIANTARG FAR* pvargDest,
    VARIANTARG FAR* pvargSrc,
    unsigned short wFlags,
    VARTYPE vt)
{
    VARIANT varTmp;
    HRESULT hresult;
    VARTYPE vtSrc;

    if (pvargDest == NULL || pvargSrc == NULL)
      return(E_INVALIDARG);

    vtSrc = V_VT(pvargSrc); // get src vartype

    hresult = NOERROR;          // assume success
    // NOTE: all code after this point must go to LError0 upon Error.

    // should have validated the destination type at this point (to ensure
    // that the below optimized switch statement will work properly).
    switch ( VTSW(vtSrc, vt) )
    {
      case VTSW(VT_BOOL, VT_BOOL):
      case VTSW(VT_I2, VT_I2):
      case VTSW(VT_I4, VT_I4):
      case VTSW(VT_INT, VT_INT):
      case VTSW(VT_I8, VT_I8):
      case VTSW(VT_R4, VT_R4):
      case VTSW(VT_R8, VT_R8):
      case VTSW(VT_CY, VT_CY):
      case VTSW(VT_DECIMAL, VT_DECIMAL):
      case VTSW(VT_I1, VT_I1):
      case VTSW(VT_UI1, VT_UI1):
      case VTSW(VT_UI2, VT_UI2):
      case VTSW(VT_UI4, VT_UI4):
      case VTSW(VT_UINT, VT_UINT):
      case VTSW(VT_UI8, VT_UI8):
        varTmp = *pvargSrc;
        break;

      case VTSW(VT_EMPTY, VT_BSTR):
        hresult = ErrSysAllocString(OASTR(""), &V_BSTR(&varTmp));
        break;

      case VTSW(VT_BOOL, VT_BSTR):
        //fall through to return "0" or "-1"
      case VTSW(VT_I2, VT_BSTR):
        hresult = VarBstrFromI2(V_I2(pvargSrc), LOCALE_USER_DEFAULT, 0, &V_BSTR(&varTmp));
        break;

      case VTSW(VT_I4, VT_BSTR):
      case VTSW(VT_INT, VT_BSTR):
        hresult = VarBstrFromI4(V_I4(pvargSrc), LOCALE_USER_DEFAULT, 0, &V_BSTR(&varTmp));
        break;

      case VTSW(VT_I8, VT_BSTR):
        hresult = VarBstrFromI8(V_I8(pvargSrc), LOCALE_USER_DEFAULT, 0, &V_BSTR(&varTmp));
        break;

      case VTSW(VT_R4, VT_BSTR):
        hresult = VarBstrFromR4(V_R4(pvargSrc), LOCALE_USER_DEFAULT, 0, &V_BSTR(&varTmp));
        break;


      case VTSW(VT_R8, VT_BSTR):
        hresult = VarBstrFromR8(V_R8(pvargSrc), LOCALE_USER_DEFAULT, 0, &V_BSTR(&varTmp));
        break;

      case VTSW(VT_CY, VT_BSTR):
        hresult = VarBstrFromCy(V_CY(pvargSrc), LOCALE_USER_DEFAULT, 0, &V_BSTR(&varTmp));
        break;

      case VTSW(VT_DECIMAL, VT_BSTR):
        hresult = VarBstrFromDec(&pvargSrc->n1.decVal, LOCALE_USER_DEFAULT, 0, &V_BSTR(&varTmp));
        break;

      case VTSW(VT_I1, VT_BSTR):
        hresult = VarBstrFromI1(V_I1(pvargSrc), LOCALE_USER_DEFAULT, 0, &V_BSTR(&varTmp));
        break;

      case VTSW(VT_UI1, VT_BSTR):
        hresult = VarBstrFromUI1(V_UI1(pvargSrc), LOCALE_USER_DEFAULT, 0, &V_BSTR(&varTmp));
        break;

      case VTSW(VT_UI2, VT_BSTR):
        hresult = VarBstrFromUI2(V_UI2(pvargSrc), LOCALE_USER_DEFAULT, 0, &V_BSTR(&varTmp));
        break;

      case VTSW(VT_UI4, VT_BSTR):
      case VTSW(VT_UINT, VT_BSTR):
        hresult = VarBstrFromUI4(V_UI4(pvargSrc), LOCALE_USER_DEFAULT, 0, &V_BSTR(&varTmp));
        break;

      case VTSW(VT_UI8, VT_BSTR):
        hresult = VarBstrFromUI8(V_UI8(pvargSrc), LOCALE_USER_DEFAULT, 0, &V_BSTR(&varTmp));
        break;

      case VTSW(VT_BSTR, VT_BSTR):
        hresult = ErrSysAllocString(V_BSTR(pvargSrc), &V_BSTR(&varTmp));
        break;

      case VTSW(VT_DATE, VT_BSTR):
          _ASSERTE(false);
          hresult = RESULT(DISP_E_TYPEMISMATCH);
          break;

      default:
        if (vtSrc >= VT_VARIANT) {
          IfFailGo(IsLegalVartype(vtSrc), LError0);
        }

        // everybody else gets a type mis-match error
        _ASSERTE(false);
        hresult = RESULT(DISP_E_TYPEMISMATCH);
        break;
    }

    if (FAILED(hresult))
    {
        goto LError0;
    }

    // now set the tag in temp variant.  Errors after this point have to
    // goto LError1 to potentially clear this variant.
    V_VT(&varTmp) = vt;

    // now that we have succeeded, we can go ahead and destroy our
    // destination variant.
    if (V_VT(pvargDest) >= VT_BSTR) {
        IfFailGo(VariantClear(pvargDest), LError1);
    }

    // copy in the variant we just created
    memcpy(pvargDest, &varTmp, sizeof(VARIANT));

    return NOERROR;

LError1:;
    VariantClear(&varTmp);
    // fall through

LError0:;
    return hresult;
}