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1 | /* $XConsortium: XDelAssoc.c,v 10.19 91/01/06 12:06:39 rws Exp $ */ |
2 | /* Copyright Massachusetts Institute of Technology 1985 */ | |
3 | ||
4 | /* | |
5 | Permission to use, copy, modify, distribute, and sell this software and its | |
6 | documentation for any purpose is hereby granted without fee, provided that | |
7 | the above copyright notice appear in all copies and that both that | |
8 | copyright notice and this permission notice appear in supporting | |
9 | documentation, and that the name of M.I.T. not be used in advertising or | |
10 | publicity pertaining to distribution of the software without specific, | |
11 | written prior permission. M.I.T. makes no representations about the | |
12 | suitability of this software for any purpose. It is provided "as is" | |
13 | without express or implied warranty. | |
14 | */ | |
15 | ||
16 | #include <X11/Xlib.h> | |
17 | #include "X10.h" | |
18 | void emacs_remque(); | |
19 | struct qelem { | |
20 | struct qelem *q_forw; | |
21 | struct qelem *q_back; | |
22 | char q_data[1]; | |
23 | }; | |
24 | ||
25 | /* | |
26 | * XDeleteAssoc - Delete an association in an XAssocTable keyed on | |
27 | * an XId. An association may be removed only once. Redundant | |
28 | * deletes are meaningless (but cause no problems). | |
29 | */ | |
30 | XDeleteAssoc(dpy, table, x_id) | |
31 | register Display *dpy; | |
32 | register XAssocTable *table; | |
33 | register XID x_id; | |
34 | { | |
35 | int hash; | |
36 | register XAssoc *bucket; | |
37 | register XAssoc *Entry; | |
38 | ||
39 | /* Hash the XId to get the bucket number. */ | |
40 | hash = x_id & (table->size - 1); | |
41 | /* Look up the bucket to get the entries in that bucket. */ | |
42 | bucket = &table->buckets[hash]; | |
43 | /* Get the first entry in the bucket. */ | |
44 | Entry = bucket->next; | |
45 | ||
46 | /* Scan through the entries in the bucket for the right XId. */ | |
47 | for (; Entry != bucket; Entry = Entry->next) { | |
48 | if (Entry->x_id == x_id) { | |
49 | /* We have the right XId. */ | |
50 | if (Entry->display == dpy) { | |
51 | /* We have the right display. */ | |
52 | /* We have the right entry! */ | |
53 | /* Remove it from the queue and */ | |
54 | /* free the entry. */ | |
55 | emacs_remque((struct qelem *)Entry); | |
56 | free((char *)Entry); | |
57 | return; | |
58 | } | |
59 | /* Oops, identical XId's on different displays! */ | |
60 | continue; | |
61 | } | |
62 | if (Entry->x_id > x_id) { | |
63 | /* We have gone past where it should be. */ | |
64 | /* It is apparently not in the table. */ | |
65 | return; | |
66 | } | |
67 | } | |
68 | /* It is apparently not in the table. */ | |
69 | return; | |
70 | } | |
71 |