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/* $Xorg: xkbatom.c,v 1.4 2001/02/09 02:04:05 xorgcvs Exp $ */
/***********************************************************
Copyright 1987, 1998 The Open Group
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.
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
OPEN GROUP 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 Open Group 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 Open Group.
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.
******************************************************************/
/************************************************************
Copyright 1994 by Silicon Graphics Computer Systems, Inc.
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 Silicon Graphics not be
used in advertising or publicity pertaining to distribution
of the software without specific prior written permission.
Silicon Graphics makes no representation about the suitability
of this software for any purpose. It is provided "as is"
without any express or implied warranty.
SILICON GRAPHICS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
GRAPHICS 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.
********************************************************/
/* $XFree86$ */
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <X11/Xos.h>
#include <X11/Xlib.h>
#include <X11/XKBlib.h>
#include "XKMformat.h"
#include "XKBfileInt.h"
/***====================================================================***/
#define InitialTableSize 100
typedef struct _Node {
struct _Node *left, *right;
Atom a;
unsigned int fingerPrint;
char *string;
} NodeRec, *NodePtr;
#define BAD_RESOURCE 0xe0000000
static Atom lastAtom = None;
static NodePtr atomRoot = (NodePtr)NULL;
static unsigned long tableLength;
static NodePtr *nodeTable;
static Atom
_XkbMakeAtom(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) _XkbAlloc(sizeof(NodeRec));
if (!nd)
return BAD_RESOURCE;
nd->string = (char *) _XkbAlloc(len + 1);
if (!nd->string) {
_XkbFree(nd);
return BAD_RESOURCE;
}
strncpy(nd->string, string, (int)len);
nd->string[len] = 0;
if ((lastAtom + 1) >= tableLength) {
NodePtr *table;
table = (NodePtr *) _XkbRealloc(nodeTable,
tableLength * (2 * sizeof(NodePtr)));
if (!table) {
if (nd->string != string)
_XkbFree(nd->string);
_XkbFree(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;
}
static char *
_XkbNameForAtom(Atom atom)
{
NodePtr node;
if (atom > lastAtom) return 0;
if ((node = nodeTable[atom]) == (NodePtr)NULL) return 0;
return node->string;
}
static void
_XkbInitAtoms(void)
{
tableLength = InitialTableSize;
nodeTable = (NodePtr *)_XkbAlloc(InitialTableSize*sizeof(NodePtr));
nodeTable[None] = (NodePtr)NULL;
}
/***====================================================================***/
char *
XkbAtomGetString(Display *dpy,Atom atm)
{
if (atm==None)
return NULL;
if (dpy==NULL)
return _XkbNameForAtom(atm);
return XGetAtomName(dpy,atm);
}
/***====================================================================***/
Atom
XkbInternAtom(Display *dpy,char *name,Bool onlyIfExists)
{
if (name==NULL)
return None;
if (dpy==NULL) {
return _XkbMakeAtom(name, strlen(name), (!onlyIfExists));
}
return XInternAtom(dpy,name,onlyIfExists);
}
/***====================================================================***/
Atom
XkbChangeAtomDisplay(Display *oldDpy,Display *newDpy,Atom atm)
{
char *tmp;
if (atm!=None) {
tmp= XkbAtomGetString(oldDpy,atm);
if (tmp!=NULL)
return XkbInternAtom(newDpy,tmp,False);
}
return None;
}
/***====================================================================***/
void
XkbInitAtoms(Display *dpy)
{
static int been_here= 0;
if ((dpy==NULL)&&(!been_here)) {
_XkbInitAtoms();
been_here= 1;
}
return;
}
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