Xext: vidmode: simplify dispatcher

These dispatcher functions are much more complex than they're usually are
(just switch/case statement). Bring them in line with the standard scheme
used in the Xserver, so further steps become easier.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>

Xext/vidmode.c

@@ -447,6 +447,10 @@ ProcVidModeAddModeLine(ClientPtr client)
     int dotClock;
     int ver;
 
+    /* limited to local-only connections */
+    if (!VidModeAllowNonLocal && !client->local)
+        return VidModeErrorBase + XF86VidModeClientNotLocal;
+
     DEBUG_P("XF86VidModeAddModeline");
 
     ver = ClientMajorVersion(client);
@@ -617,6 +621,10 @@ ProcVidModeDeleteModeLine(ClientPtr client)
     int len, dotClock;
     int ver;
 
+    /* limited to local-only connections */
+    if (!VidModeAllowNonLocal && !client->local)
+        return VidModeErrorBase + XF86VidModeClientNotLocal;
+
     DEBUG_P("XF86VidModeDeleteModeline");
 
     ver = ClientMajorVersion(client);
@@ -741,6 +749,10 @@ ProcVidModeModModeLine(ClientPtr client)
     int len, dotClock;
     int ver;
 
+    /* limited to local-only connections */
+    if (!VidModeAllowNonLocal && !client->local)
+        return VidModeErrorBase + XF86VidModeClientNotLocal;
+
     DEBUG_P("XF86VidModeModModeline");
 
     ver = ClientMajorVersion(client);
@@ -1008,6 +1020,10 @@ ProcVidModeSwitchMode(ClientPtr client)
 
     REQUEST_SIZE_MATCH(xXF86VidModeSwitchModeReq);
 
+    /* limited to local-only connections */
+    if (!VidModeAllowNonLocal && !client->local)
+        return VidModeErrorBase + XF86VidModeClientNotLocal;
+
     if (stuff->screen >= screenInfo.numScreens)
         return BadValue;
     pScreen = screenInfo.screens[stuff->screen];
@@ -1036,6 +1052,10 @@ ProcVidModeSwitchToMode(ClientPtr client)
 
     DEBUG_P("XF86VidModeSwitchToMode");
 
+    /* limited to local-only connections */
+    if (!VidModeAllowNonLocal && !client->local)
+        return VidModeErrorBase + XF86VidModeClientNotLocal;
+
     ver = ClientMajorVersion(client);
 
     if (ver < 2) {
@@ -1140,6 +1160,10 @@ ProcVidModeLockModeSwitch(ClientPtr client)
 
     DEBUG_P("XF86VidModeLockModeSwitch");
 
+    /* limited to local-only connections */
+    if (!VidModeAllowNonLocal && !client->local)
+        return VidModeErrorBase + XF86VidModeClientNotLocal;
+
     if (stuff->screen >= screenInfo.numScreens)
         return BadValue;
     pScreen = screenInfo.screens[stuff->screen];
@@ -1303,6 +1327,10 @@ ProcVidModeSetViewPort(ClientPtr client)
 
     REQUEST_SIZE_MATCH(xXF86VidModeSetViewPortReq);
 
+    /* limited to local-only connections */
+    if (!VidModeAllowNonLocal && !client->local)
+        return VidModeErrorBase + XF86VidModeClientNotLocal;
+
     if (stuff->screen >= screenInfo.numScreens)
         return BadValue;
     pScreen = screenInfo.screens[stuff->screen];
@@ -1401,6 +1429,10 @@ ProcVidModeSetGamma(ClientPtr client)
 
     REQUEST_SIZE_MATCH(xXF86VidModeSetGammaReq);
 
+    /* limited to local-only connections */
+    if (!VidModeAllowNonLocal && !client->local)
+        return VidModeErrorBase + XF86VidModeClientNotLocal;
+
     if (stuff->screen >= screenInfo.numScreens)
         return BadValue;
     pScreen = screenInfo.screens[stuff->screen];
@@ -1468,6 +1500,10 @@ ProcVidModeSetGammaRamp(ClientPtr client)
     ScreenPtr pScreen;
     VidModePtr pVidMode;
 
+    /* limited to local-only connections */
+    if (!VidModeAllowNonLocal && !client->local)
+        return VidModeErrorBase + XF86VidModeClientNotLocal;
+
     REQUEST(xXF86VidModeSetGammaRampReq);
     REQUEST_AT_LEAST_SIZE(xXF86VidModeSetGammaRampReq);
 
@@ -1675,9 +1711,6 @@ ProcVidModeDispatch(ClientPtr client)
         return ProcVidModeGetGammaRampSize(client);
     case X_XF86VidModeGetPermissions:
         return ProcVidModeGetPermissions(client);
-    default:
-        if (VidModeAllowNonLocal || client->local) {
-            switch (stuff->data) {
     case X_XF86VidModeAddModeLine:
         return ProcVidModeAddModeLine(client);
     case X_XF86VidModeDeleteModeLine:
@@ -1700,10 +1733,6 @@ ProcVidModeDispatch(ClientPtr client)
         return BadRequest;
     }
 }
-        else
-            return VidModeErrorBase + XF86VidModeClientNotLocal;
-    }
-}
 
 static int _X_COLD
 SProcVidModeGetModeLine(ClientPtr client)
@@ -2065,9 +2094,6 @@ SProcVidModeDispatch(ClientPtr client)
         return SProcVidModeGetGammaRampSize(client);
     case X_XF86VidModeGetPermissions:
         return SProcVidModeGetPermissions(client);
-    default:
-        if (VidModeAllowNonLocal || client->local) {
-            switch (stuff->data) {
     case X_XF86VidModeAddModeLine:
         return SProcVidModeAddModeLine(client);
     case X_XF86VidModeDeleteModeLine:
@@ -2090,10 +2116,6 @@ SProcVidModeDispatch(ClientPtr client)
         return BadRequest;
     }
 }
-        else
-            return VidModeErrorBase + XF86VidModeClientNotLocal;
-    }
-}
 
 void
 VidModeAddExtension(Bool allow_non_local)