--- /dev/null
+/***********************************************************
+
+Copyright (c) 1987 X Consortium
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of the X Consortium shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from the X Consortium.
+
+
+Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
+
+ All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+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 Digital not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL 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.
+
+******************************************************************/
+
+/* $XConsortium: atom.c,v 1.30 94/04/17 20:26:16 dpw Exp $ */
+/* $XFree86: xc/programs/Xserver/dix/atom.c,v 3.0 1996/04/15 11:19:31 dawes Exp $ */
+
+#include "X.h"
+#include "Xatom.h"
+#include "misc.h"
+#include "resource.h"
+#include "dix.h"
+
+#define InitialTableSize 100
+
+typedef struct _Node {
+ struct _Node *left, *right;
+ Atom a;
+ unsigned int fingerPrint;
+ char *string;
+} NodeRec, *NodePtr;
+
+static Atom lastAtom = None;
+static NodePtr atomRoot = (NodePtr)NULL;
+static unsigned long tableLength;
+static NodePtr *nodeTable;
+
+Atom
+MakeAtom(string, len, makeit)
+ char *string;
+ unsigned len;
+ Bool makeit;
+{
+ register NodePtr * np;
+ unsigned i;
+ int comp;
+ register unsigned int fp = 0;
+
+ np = &atomRoot;
+ for (i = 0; i < (len+1)/2; i++)
+ {
+ fp = fp * 27 + string[i];
+ fp = fp * 27 + string[len - 1 - i];
+ }
+ while (*np != (NodePtr) NULL)
+ {
+ if (fp < (*np)->fingerPrint)
+ np = &((*np)->left);
+ else if (fp > (*np)->fingerPrint)
+ np = &((*np)->right);
+ else
+ { /* now start testing the strings */
+ comp = strncmp(string, (*np)->string, (int)len);
+ if ((comp < 0) || ((comp == 0) && (len < strlen((*np)->string))))
+ np = &((*np)->left);
+ else if (comp > 0)
+ np = &((*np)->right);
+ else
+ return(*np)->a;
+ }
+ }
+ if (makeit)
+ {
+ register NodePtr nd;
+
+ nd = (NodePtr) xalloc(sizeof(NodeRec));
+ if (!nd)
+ return BAD_RESOURCE;
+ if (lastAtom < XA_LAST_PREDEFINED)
+ {
+ nd->string = string;
+ }
+ else
+ {
+ nd->string = (char *) xalloc(len + 1);
+ if (!nd->string) {
+ xfree(nd);
+ return BAD_RESOURCE;
+ }
+ strncpy(nd->string, string, (int)len);
+ nd->string[len] = 0;
+ }
+ if ((lastAtom + 1) >= tableLength) {
+ NodePtr *table;
+
+ table = (NodePtr *) xrealloc(nodeTable,
+ tableLength * (2 * sizeof(NodePtr)));
+ if (!table) {
+ if (nd->string != string)
+ xfree(nd->string);
+ xfree(nd);
+ return BAD_RESOURCE;
+ }
+ tableLength <<= 1;
+ nodeTable = table;
+ }
+ *np = nd;
+ nd->left = nd->right = (NodePtr) NULL;
+ nd->fingerPrint = fp;
+ nd->a = (++lastAtom);
+ *(nodeTable+lastAtom) = nd;
+ return nd->a;
+ }
+ else
+ return None;
+}
+
+Bool
+ValidAtom(atom)
+ Atom atom;
+{
+ return (atom != None) && (atom <= lastAtom);
+}
+
+char *
+NameForAtom(atom)
+ Atom atom;
+{
+ NodePtr node;
+ if (atom > lastAtom) return 0;
+ if ((node = nodeTable[atom]) == (NodePtr)NULL) return 0;
+ return node->string;
+}
+
+void
+AtomError()
+{
+ FatalError("initializing atoms");
+}
+
+void
+FreeAtom(patom)
+ NodePtr patom;
+{
+ if(patom->left)
+ FreeAtom(patom->left);
+ if(patom->right)
+ FreeAtom(patom->right);
+ if (patom->a > XA_LAST_PREDEFINED)
+ xfree(patom->string);
+ xfree(patom);
+}
+
+void
+FreeAllAtoms()
+{
+ if(atomRoot == (NodePtr)NULL)
+ return;
+ FreeAtom(atomRoot);
+ atomRoot = (NodePtr)NULL;
+ xfree(nodeTable);
+ nodeTable = (NodePtr *)NULL;
+ lastAtom = None;
+}
+
+void
+InitAtoms()
+{
+ FreeAllAtoms();
+ tableLength = InitialTableSize;
+ nodeTable = (NodePtr *)xalloc(InitialTableSize*sizeof(NodePtr));
+ if (!nodeTable)
+ AtomError();
+ nodeTable[None] = (NodePtr)NULL;
+ MakePredeclaredAtoms();
+ if (lastAtom != XA_LAST_PREDEFINED)
+ AtomError ();
+}
+
+
projects / rdpsrv / blobdiff