C++ bytes_to_int32函数代码示例

int
SProcXSendExtensionEvent(ClientPtr client)
{
    CARD32 *p;
    int i;
    xEvent eventT;
    xEvent *eventP;
    EventSwapPtr proc;

    REQUEST(xSendExtensionEventReq);
    swaps(&stuff->length);
    REQUEST_AT_LEAST_SIZE(xSendExtensionEventReq);
    swapl(&stuff->destination);
    swaps(&stuff->count);

    if (stuff->length != bytes_to_int32(sizeof(xSendExtensionEventReq)) + stuff->count +
       bytes_to_int32(stuff->num_events * sizeof(xEvent)))
       return BadLength;

    eventP = (xEvent *) & stuff[1];
    for (i = 0; i < stuff->num_events; i++, eventP++) {
	proc = EventSwapVector[eventP->u.u.type & 0177];
	if (proc == NotImplemented)	/* no swapping proc; invalid event type? */
	    return BadValue;
	(*proc) (eventP, &eventT);
	*eventP = eventT;
    }

    p = (CARD32 *)(((xEvent *) & stuff[1]) + stuff->num_events);
    SwapLongs(p, stuff->count);
    return (ProcXSendExtensionEvent(client));
}

static int
SProcSecurityGenerateAuthorization(
    ClientPtr client)
{
    REQUEST(xSecurityGenerateAuthorizationReq);
    char	n;
    CARD32 *values;
    unsigned long nvalues;
    int values_offset;

    swaps(&stuff->length, n);
    REQUEST_AT_LEAST_SIZE(xSecurityGenerateAuthorizationReq);
    swaps(&stuff->nbytesAuthProto, n);
    swaps(&stuff->nbytesAuthData, n);
    swapl(&stuff->valueMask, n);
    values_offset = bytes_to_int32(stuff->nbytesAuthProto) +
		    bytes_to_int32(stuff->nbytesAuthData);
    if (values_offset > 
	stuff->length - bytes_to_int32(sz_xSecurityGenerateAuthorizationReq))
	return BadLength;
    values = (CARD32 *)(&stuff[1]) + values_offset;
    nvalues = (((CARD32 *)stuff) + stuff->length) - values;
    SwapLongs(values, nvalues);
    return ProcSecurityGenerateAuthorization(client);
} /* SProcSecurityGenerateAuthorization */

/**
 * Write button information into info.
 * @return Number of bytes written into info.
 */
int
ListButtonInfo(DeviceIntPtr dev, xXIButtonInfo * info, Bool reportState)
{
    unsigned char *bits;
    int mask_len;
    int i;

    if (!dev || !dev->button)
        return 0;

    mask_len = bytes_to_int32(bits_to_bytes(dev->button->numButtons));

    info->type = ButtonClass;
    info->num_buttons = dev->button->numButtons;
    info->length = bytes_to_int32(sizeof(xXIButtonInfo)) +
        info->num_buttons + mask_len;
    info->sourceid = dev->button->sourceid;

    bits = (unsigned char *) &info[1];
    memset(bits, 0, mask_len * 4);

    if (reportState)
        for (i = 0; i < dev->button->numButtons; i++)
            if (BitIsOn(dev->button->down, i))
                SetBit(bits, i);

    bits += mask_len * 4;
    memcpy(bits, dev->button->labels, dev->button->numButtons * sizeof(Atom));

    return info->length * 4;
}

int
ProcRRCreateMode (ClientPtr client)
{
    REQUEST(xRRCreateModeReq);
    xRRCreateModeReply	rep;
    WindowPtr		pWin;
    ScreenPtr		pScreen;
    rrScrPrivPtr	pScrPriv;
    xRRModeInfo		*modeInfo;
    long		units_after;
    char		*name;
    int			error, rc;
    RRModePtr		mode;

    REQUEST_AT_LEAST_SIZE (xRRCreateModeReq);
    rc = dixLookupWindow(&pWin, stuff->window, client, DixGetAttrAccess);
    if (rc != Success)
        return rc;

    pScreen = pWin->drawable.pScreen;
    pScrPriv = rrGetScrPriv(pScreen);

    modeInfo = &stuff->modeInfo;
    name = (char *) (stuff + 1);
    units_after = (stuff->length - bytes_to_int32(sizeof (xRRCreateModeReq)));

    /* check to make sure requested name fits within the data provided */
    if (bytes_to_int32(modeInfo->nameLength) > units_after)
        return BadLength;

    mode = RRModeCreateUser (pScreen, modeInfo, name, &error);
    if (!mode)
        return error;

    rep.type = X_Reply;
    rep.pad0 = 0;
    rep.sequenceNumber = client->sequence;
    rep.length = 0;
    rep.mode = mode->mode.id;
    if (client->swapped)
    {
        int n;
        swaps(&rep.sequenceNumber, n);
        swapl(&rep.length, n);
        swapl(&rep.mode, n);
    }
    WriteToClient(client, sizeof(xRRCreateModeReply), (char *)&rep);
    /* Drop out reference to this mode */
    RRModeDestroy (mode);
    return client->noClientException;
}

int
ProcXChangeDeviceKeyMapping(ClientPtr client)
{
    int ret;
    unsigned len;
    DeviceIntPtr dev;
    unsigned int count;

    REQUEST(xChangeDeviceKeyMappingReq);
    REQUEST_AT_LEAST_SIZE(xChangeDeviceKeyMappingReq);

    count = stuff->keyCodes * stuff->keySymsPerKeyCode;
    REQUEST_FIXED_SIZE(xChangeDeviceKeyMappingReq, count * sizeof(CARD32));

    ret = dixLookupDevice(&dev, stuff->deviceid, client, DixManageAccess);
    if (ret != Success)
        return ret;
    len = stuff->length - bytes_to_int32(sizeof(xChangeDeviceKeyMappingReq));

    ret = ChangeKeyMapping(client, dev, len, DeviceMappingNotify,
                           stuff->firstKeyCode, stuff->keyCodes,
                           stuff->keySymsPerKeyCode, (KeySym *) & stuff[1]);

    return ret;
}

        /* 1 - 7 is the range we use for the global modifiers array
         * above */
        assert(mods->modifiers > 0);
        assert(mods->modifiers <= 7);
        assert(mods->modifiers % 2 == 1); /* because we fail odd ones */
        assert(mods->status != Success);
        assert(mods->pad0 == 0);
        assert(mods->pad1 == 0);
    }

    reply_handler = reply_XIPassiveGrabDevice;
}

static void request_XIPassiveGrabDevice(ClientPtr client, xXIPassiveGrabDeviceReq* req, int error, int errval)
{
    int rc;
    int modifiers;

    rc = ProcXIPassiveGrabDevice(&client_request);
    assert(rc == error);

    if (rc != Success)
        assert(client_request.errorValue == errval);

    client_request.swapped = TRUE;
    swaps(&req->length);
    swapl(&req->time);
    swapl(&req->grab_window);
    swapl(&req->cursor);
    swapl(&req->detail);
    swaps(&req->deviceid);
    modifiers = req->num_modifiers;
    swaps(&req->num_modifiers);
    swaps(&req->mask_len);

    while(modifiers--)
    {
        CARD32 *mod = ((CARD32*)(req + 1)) + modifiers;
        swapl(mod);
    }

    rc = SProcXIPassiveGrabDevice(&client_request);
    assert(rc == error);

    if (rc != Success)
        assert(client_request.errorValue == errval);
}

static unsigned char *data[4096]; /* the request buffer */
static void test_XIPassiveGrabDevice(void)
{
    int i;
    xXIPassiveGrabDeviceReq *request = (xXIPassiveGrabDeviceReq*)data;
    unsigned char *mask;

    request_init(request, XIPassiveGrabDevice);

    request->grab_window = CLIENT_WINDOW_ID;

    reply_handler = reply_XIPassiveGrabDevice;
    client_request = init_client(request->length, request);

    printf("Testing invalid device\n");
    request->deviceid = 12;
    request_XIPassiveGrabDevice(&client_request, request, BadDevice, request->deviceid);

    request->deviceid = XIAllMasterDevices;

    printf("Testing invalid grab types\n");
    for (i = XIGrabtypeFocusIn + 1; i < 0xFF; i++)
    {
        request->grab_type = i;
        request_XIPassiveGrabDevice(&client_request, request, BadValue, request->grab_type);
    }

    printf("Testing invalid grab type + detail combinations\n");
    request->grab_type = XIGrabtypeEnter;
    request->detail = 1;
    request_XIPassiveGrabDevice(&client_request, request, BadValue, request->detail);

    request->grab_type = XIGrabtypeFocusIn;
    request_XIPassiveGrabDevice(&client_request, request, BadValue, request->detail);

    request->detail = 0;

    printf("Testing invalid masks\n");
    mask = (unsigned char*)&request[1];

    request->mask_len = bytes_to_int32(XI2LASTEVENT + 1);
    request->length += request->mask_len;
    SetBit(mask, XI2LASTEVENT + 1);
    request_XIPassiveGrabDevice(&client_request, request, BadValue, XI2LASTEVENT + 1);

    ClearBit(mask, XI2LASTEVENT + 1);

    /* tested all special cases now, test a few valid cases */

    /* no modifiers */
    request->deviceid = XIAllDevices;
    request->grab_type = XIGrabtypeButton;
//.........这里部分代码省略.........

static int
eventToBarrierEvent(BarrierEvent *ev, xEvent **xi)
{
    xXIBarrierEvent *barrier;
    int len = sizeof(xXIBarrierEvent);

    *xi = calloc(1, len);
    barrier = (xXIBarrierEvent*) *xi;
    barrier->type = GenericEvent;
    barrier->extension = IReqCode;
    barrier->evtype = GetXI2Type(ev->type);
    barrier->length = bytes_to_int32(len - sizeof(xEvent));
    barrier->deviceid = ev->deviceid;
    barrier->sourceid = ev->sourceid;
    barrier->time = ev->time;
    barrier->event = ev->window;
    barrier->root = ev->root;
    barrier->dx = double_to_fp3232(ev->dx);
    barrier->dy = double_to_fp3232(ev->dy);
    barrier->dtime = ev->dt;
    barrier->flags = ev->flags;
    barrier->eventid = ev->event_id;
    barrier->barrier = ev->barrierid;
    barrier->root_x = double_to_fp1616(ev->root_x);
    barrier->root_y = double_to_fp1616(ev->root_y);

    return Success;
}

/**
 * Send a GLX reply to the client.
 *
 * Technically speaking, there are several different ways to encode a GLX
 * reply.  The primary difference is whether or not certain fields (e.g.,
 * retval, size, and "pad3") are set.  This function gets around that by
 * always setting all of the fields to "reasonable" values.  This does no
 * harm to clients, but it does make the server-side code much more compact.
 *
 * \warning
 * This function assumes that values stored in \c data will be byte-swapped
 * by the caller if necessary.
 */
void
__glXSendReplySwap( ClientPtr client, const void * data, size_t elements,
    size_t element_size, GLboolean always_array, CARD32 retval )
{
    size_t reply_ints = 0;

    if ( __glXErrorOccured() ) {
        elements = 0;
    }
    else if ( (elements > 1) || always_array ) {
        reply_ints = bytes_to_int32(elements * element_size);
    }

    __glXReply.length =         bswap_32( reply_ints );
    __glXReply.type =           X_Reply;
    __glXReply.sequenceNumber = bswap_16( client->sequence );
    __glXReply.size =           bswap_32( elements );
    __glXReply.retval =         bswap_32( retval );


    /* It is faster on almost always every architecture to just copy the 8
     * bytes, even when not necessary, than check to see of the value of
     * elements requires it.  Copying the data when not needed will do no
     * harm.
     */

    (void) memcpy( & __glXReply.pad3, data, 8 );
    WriteToClient( client, sz_xGLXSingleReply, (char *) & __glXReply );

    if ( reply_ints != 0 ) {
        WriteToClient( client, reply_ints * 4, (char *) data );
    }
}

static int
SELinuxSendContextReply(ClientPtr client, security_id_t sid)
{
    SELinuxGetContextReply rep;
    security_context_t ctx = NULL;
    int len = 0;

    if (sid) {
	if (avc_sid_to_context_raw(sid, &ctx) < 0)
	    return BadValue;
	len = strlen(ctx) + 1;
    }

    rep.type = X_Reply;
    rep.length = bytes_to_int32(len);
    rep.sequenceNumber = client->sequence;
    rep.context_len = len;

    if (client->swapped) {
	swapl(&rep.length);
	swaps(&rep.sequenceNumber);
	swapl(&rep.context_len);
    }

    WriteToClient(client, sizeof(SELinuxGetContextReply), (char *)&rep);
    WriteToClient(client, len, ctx);
    freecon(ctx);
    return Success;
}

int
ProcRRSetCrtcGamma (ClientPtr client)
{
    REQUEST(xRRSetCrtcGammaReq);
    RRCrtcPtr			crtc;
    unsigned long		len;
    CARD16			*red, *green, *blue;
    
    REQUEST_AT_LEAST_SIZE(xRRSetCrtcGammaReq);
    VERIFY_RR_CRTC(stuff->crtc, crtc, DixReadAccess);
    
    len = client->req_len - bytes_to_int32(sizeof (xRRSetCrtcGammaReq));
    if (len < (stuff->size * 3 + 1) >> 1)
	return BadLength;

    if (stuff->size != crtc->gammaSize)
	return BadMatch;
    
    red = (CARD16 *) (stuff + 1);
    green = red + crtc->gammaSize;
    blue = green + crtc->gammaSize;
    
    RRCrtcGammaSet (crtc, red, green, blue);

    return Success;
}

static void
transform_encode (ClientPtr client, xRenderTransform *wire, PictTransform *pict)
{
    xRenderTransform_from_PictTransform (wire, pict);
    if (client->swapped)
	SwapLongs ((CARD32 *) wire, bytes_to_int32(sizeof(xRenderTransform)));
}

static int
ProcXvQueryEncodings(ClientPtr client)
{
  xvEncodingInfo einfo;
  xvQueryEncodingsReply rep;
  int totalSize;
  int nameSize;
  XvPortPtr pPort;
  int ne;
  XvEncodingPtr pe;
  int status;

  REQUEST(xvQueryEncodingsReq);
  REQUEST_SIZE_MATCH(xvQueryEncodingsReq);

  VALIDATE_XV_PORT(stuff->port, pPort, DixReadAccess);

  if ((status = _AllocatePort(stuff->port, pPort)) != Success)
    {
      client->errorValue = stuff->port;
      return status;
    }

  rep.type = X_Reply;
  rep.sequenceNumber = client->sequence;
  rep.num_encodings = pPort->pAdaptor->nEncodings;

  /* FOR EACH ENCODING ADD UP THE BYTES FOR ENCODING NAMES */

  ne = pPort->pAdaptor->nEncodings;
  pe = pPort->pAdaptor->pEncodings;
  totalSize = ne * sz_xvEncodingInfo;
  while (ne--)
    {
      totalSize += pad_to_int32(strlen(pe->name));
      pe++;
    }

  rep.length = bytes_to_int32(totalSize);

  _WriteQueryEncodingsReply(client, &rep);

  ne = pPort->pAdaptor->nEncodings;
  pe = pPort->pAdaptor->pEncodings;
  while (ne--) 
    {
      einfo.encoding = pe->id;
      einfo.name_size = nameSize = strlen(pe->name);
      einfo.width = pe->width;
      einfo.height = pe->height;
      einfo.rate.numerator = pe->rate.numerator;
      einfo.rate.denominator = pe->rate.denominator;
      _WriteEncodingInfo(client, &einfo);
      WriteToClient(client, nameSize, pe->name);
      pe++;
    }

  return Success;
}

int
ProcListExtensions(ClientPtr client)
{
    xListExtensionsReply reply;
    char *bufptr, *buffer;
    int total_length = 0;

    REQUEST_SIZE_MATCH(xReq);

    memset(&reply, 0, sizeof(xListExtensionsReply));
    reply.type = X_Reply;
    reply.nExtensions = 0;
    reply.length = 0;
    reply.sequenceNumber = client->sequence;
    buffer = NULL;

    if ( NumExtensions )
    {
        int i, j;

        for (i=0;  i<NumExtensions; i++)
	{
	    /* call callbacks to find out whether to show extension */
	    if (XaceHook(XACE_EXT_ACCESS, client, extensions[i]) != Success)
		continue;

	    total_length += strlen(extensions[i]->name) + 1;
	    reply.nExtensions += 1 + extensions[i]->num_aliases;
	    for (j = extensions[i]->num_aliases; --j >= 0;)
		total_length += strlen(extensions[i]->aliases[j]) + 1;
	}
        reply.length = bytes_to_int32(total_length);
	buffer = bufptr = malloc(total_length);
	if (!buffer)
	    return BadAlloc;
        for (i=0;  i<NumExtensions; i++)
        {
	    int len;
	    if (XaceHook(XACE_EXT_ACCESS, client, extensions[i]) != Success)
		continue;

            *bufptr++ = len = strlen(extensions[i]->name);
	    memmove(bufptr, extensions[i]->name,  len);
	    bufptr += len;
	    for (j = extensions[i]->num_aliases; --j >= 0;)
	    {
		*bufptr++ = len = strlen(extensions[i]->aliases[j]);
		memmove(bufptr, extensions[i]->aliases[j],  len);
		bufptr += len;
	    }
	}
    }
    WriteReplyToClient(client, sizeof(xListExtensionsReply), &reply);
    if (reply.length)
        WriteToClient(client, total_length, buffer);

    free(buffer);
    return Success;
}

static int
eventToRawEvent(RawDeviceEvent *ev, xEvent **xi)
{
    xXIRawEvent* raw;
    int vallen, nvals;
    int i, len = sizeof(xXIRawEvent);
    char *ptr;
    FP3232 *axisval, *axisval_raw;

    nvals = count_bits(ev->valuators.mask, sizeof(ev->valuators.mask));
    len += nvals * sizeof(FP3232) * 2; /* 8 byte per valuator, once
                                    raw, once processed */
    vallen = bytes_to_int32(bits_to_bytes(MAX_VALUATORS));
    len += vallen * 4; /* valuators mask */

    *xi = calloc(1, len);
    raw = (xXIRawEvent*)*xi;
    raw->type           = GenericEvent;
    raw->extension      = IReqCode;
    raw->evtype         = GetXI2Type(ev->type);
    raw->time           = ev->time;
    raw->length         = bytes_to_int32(len - sizeof(xEvent));
    raw->detail         = ev->detail.button;
    raw->deviceid       = ev->deviceid;
    raw->sourceid       = ev->sourceid;
    raw->valuators_len  = vallen;
    raw->flags          = ev->flags;

    ptr = (char*)&raw[1];
    axisval = (FP3232*)(ptr + raw->valuators_len * 4);
    axisval_raw = axisval + nvals;
    for (i = 0; i < sizeof(ev->valuators.mask) * 8; i++)
    {
        if (BitIsOn(ev->valuators.mask, i))
        {
            SetBit(ptr, i);
            *axisval =  double_to_fp3232(ev->valuators.data[i]);
            *axisval_raw = double_to_fp3232(ev->valuators.data_raw[i]);
            axisval++;
            axisval_raw++;
        }
    }

    return Success;
}

static int
SELinuxPopulateItem(SELinuxListItemRec *i, PrivateRec **privPtr, CARD32 id,
		    int *size)
{
    SELinuxObjectRec *obj = dixLookupPrivate(privPtr, objectKey);
    SELinuxObjectRec *data = dixLookupPrivate(privPtr, dataKey);

    if (avc_sid_to_context_raw(obj->sid, &i->octx) < 0)
	return BadValue;
    if (avc_sid_to_context_raw(data->sid, &i->dctx) < 0)
	return BadValue;

    i->id = id;
    i->octx_len = bytes_to_int32(strlen(i->octx) + 1);
    i->dctx_len = bytes_to_int32(strlen(i->dctx) + 1);

    *size += i->octx_len + i->dctx_len + 3;
    return Success;
}