summaryrefslogtreecommitdiff
path: root/src/xkbatom.c
blob: 7fd904a111bfc4ada3e9ee82ecd3ef9043c785d6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
/* $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;
}