Split RandR implementation into separate files.

RandR is getting too big to live in one file; split into one file per object
type (crtc, mode, screen), leaving the rest of the code in randr.c.

Code is slowly approaching the point where it will drop-in as a replacement
for the old 1.0 implementation.

randr/rrmode.c

@@ -0,0 +1,85 @@
+/*
+ * Copyright © 2006 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#include "randrstr.h"
+
+static RESTYPE	ModeType;
+
+RRModePtr
+RRModeGet (ScreenPtr	pScreen,
+	   xRRModeInfo	*modeInfo,
+	   char		*name)
+{
+    rrScrPriv (pScreen);
+    int	i;
+    RRModePtr	mode;
+
+    for (i = 0; i < pScrPriv->numModes; i++)
+    {
+	mode = pScrPriv->modes[i];
+	if (!memcmp (modeInfo, &mode->mode, sizeof (xRRModeInfo)) &&
+	    !memcmp (name, mode->name, modeInfo->nameLength))
+	{
+	    ++mode->refcnt;
+	    return mode;
+	}
+    }
+    mode = xalloc (sizeof (RRModeRec) + modeInfo->nameLength + 1);
+    mode->refcnt = 1;
+    mode->mode = *modeInfo;
+    mode->name = (char *) (mode + 1);
+    memcpy (mode->name, name, modeInfo->nameLength);
+    mode->name[modeInfo->nameLength] = '\0';
+    mode->id = FakeClientID(0);
+    if (!AddResource (mode->id, ModeType, (pointer) mode))
+	return NULL;
+    ++mode->refcnt;
+    pScrPriv->changed = TRUE;
+    return mode;
+}
+
+void
+RRModeDestroy (RRModePtr mode)
+{
+    if (--mode->refcnt > 0)
+	return;
+    xfree (mode);
+}
+
+static int
+RRModeDestroyResource (pointer value, XID pid)
+{
+    RRModeDestroy ((RRModePtr) value);
+    return 1;
+}
+
+Bool
+RRModeInit (void)
+{
+    ModeType = CreateNewResourceType (RRModeDestroyResource);
+    if (!ModeType)
+	return FALSE;
+#ifdef XResExtension
+    RegisterResourceName (ModeType, "MODE");
+#endif
+    return TRUE;
+}