1 /***********************************************************
2 Copyright 1987, 1998 The Open Group
4 Permission to use, copy, modify, distribute, and sell this software and its
5 documentation for any purpose is hereby granted without fee, provided that
6 the above copyright notice appear in all copies and that both that
7 copyright notice and this permission notice appear in supporting
10 The above copyright notice and this permission notice shall be included in
11 all copies or substantial portions of the Software.
13 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
17 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
18 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20 Except as contained in this notice, the name of The Open Group shall not be
21 used in advertising or otherwise to promote the sale, use or other dealings
22 in this Software without prior written authorization from The Open Group.
25 Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
29 Permission to use, copy, modify, and distribute this software and its
30 documentation for any purpose and without fee is hereby granted,
31 provided that the above copyright notice appear in all copies and that
32 both that copyright notice and this permission notice appear in
33 supporting documentation, and that the name of Digital not be
34 used in advertising or publicity pertaining to distribution of the
35 software without specific, written prior permission.
37 DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
38 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
39 DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
40 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
41 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
42 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
45 ******************************************************************/
47 /************************************************************
48 Copyright 1994 by Silicon Graphics Computer Systems, Inc.
50 Permission to use, copy, modify, and distribute this
51 software and its documentation for any purpose and without
52 fee is hereby granted, provided that the above copyright
53 notice appear in all copies and that both that copyright
54 notice and this permission notice appear in supporting
55 documentation, and that the name of Silicon Graphics not be
56 used in advertising or publicity pertaining to distribution
57 of the software without specific prior written permission.
58 Silicon Graphics makes no representation about the suitability
59 of this software for any purpose. It is provided "as is"
60 without any express or implied warranty.
62 SILICON GRAPHICS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
63 SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
64 AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
65 GRAPHICS BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
66 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
67 DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
68 OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH
69 THE USE OR PERFORMANCE OF THIS SOFTWARE.
71 ********************************************************/
76 struct atom_node *left, *right;
78 unsigned int fingerprint;
83 struct atom_node *root;
84 darray(struct atom_node *) table;
90 struct atom_table *table;
92 table = calloc(1, sizeof(*table));
96 darray_append(table->table, NULL);
102 free_atom(struct atom_node *patom)
107 free_atom(patom->left);
108 free_atom(patom->right);
114 atom_table_free(struct atom_table *table)
119 free_atom(table->root);
120 darray_free(table->table);
125 atom_text(struct atom_table *table, xkb_atom_t atom)
127 if (atom >= darray_size(table->table) ||
128 darray_item(table->table, atom) == NULL)
131 return darray_item(table->table, atom)->string;
135 atom_strdup(struct atom_table *table, xkb_atom_t atom)
137 const char *ret = atom_text(table, atom);
138 return ret ? strdup(ret) : NULL;
142 atom_intern(struct atom_table *table, const char *string)
144 struct atom_node **np;
145 struct atom_node *nd;
152 return XKB_ATOM_NONE;
154 len = strlen(string);
156 for (i = 0; i < (len + 1) / 2; i++) {
157 fp = fp * 27 + string[i];
158 fp = fp * 27 + string[len - 1 - i];
162 if (fp < (*np)->fingerprint)
164 else if (fp > (*np)->fingerprint)
165 np = &((*np)->right);
167 /* now start testing the strings */
168 comp = strncmp(string, (*np)->string, len);
169 if ((comp < 0) || ((comp == 0) && (len < strlen((*np)->string))))
172 np = &((*np)->right);
178 nd = malloc(sizeof(*nd));
180 return XKB_ATOM_NONE;
182 nd->string = malloc(len + 1);
185 return XKB_ATOM_NONE;
187 strncpy(nd->string, string, len);
191 nd->left = nd->right = NULL;
192 nd->fingerprint = fp;
193 nd->a = darray_size(table->table);
194 darray_append(table->table, nd);