mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-26 07:33:47 +00:00
69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
/* $XConsortium: XLookAssoc.c,v 10.16 91/01/06 12:09:24 rws Exp $ */
|
|
/* Copyright Massachusetts Institute of Technology 1985 */
|
|
|
|
/*
|
|
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, and that the name of M.I.T. not be used in advertising or
|
|
publicity pertaining to distribution of the software without specific,
|
|
written prior permission. M.I.T. makes no representations about the
|
|
suitability of this software for any purpose. It is provided "as is"
|
|
without express or implied warranty.
|
|
*/
|
|
|
|
#include <X11/Xlib.h>
|
|
#include <X11/Xresource.h>
|
|
#include "X10.h"
|
|
|
|
#ifndef NULL
|
|
#define NULL 0
|
|
#endif
|
|
|
|
/*
|
|
* XLookUpAssoc - Retrieve the data stored in an XAssocTable by its XId.
|
|
* If an appropriately matching XId can be found in the table the routine will
|
|
* return apointer to the data associated with it. If the XId can not be found
|
|
* in the table the routine will return a NULL pointer. All XId's are relative
|
|
* to the currently active Display.
|
|
*/
|
|
caddr_t XLookUpAssoc(dpy, table, x_id)
|
|
register Display *dpy;
|
|
register XAssocTable *table; /* XAssocTable to search in. */
|
|
register XID x_id; /* XId to search for. */
|
|
{
|
|
int hash;
|
|
register XAssoc *bucket;
|
|
register XAssoc *Entry;
|
|
|
|
/* Hash the XId to get the bucket number. */
|
|
hash = x_id & (table->size - 1);
|
|
/* Look up the bucket to get the entries in that bucket. */
|
|
bucket = &table->buckets[hash];
|
|
/* Get the first entry in the bucket. */
|
|
Entry = bucket->next;
|
|
|
|
/* Scan through the entries in the bucket for the right XId. */
|
|
for (; Entry != bucket; Entry = Entry->next) {
|
|
if (Entry->x_id == x_id) {
|
|
/* We have the right XId. */
|
|
if (Entry->display == dpy) {
|
|
/* We have the right display. */
|
|
/* We have the right entry! */
|
|
return(Entry->data);
|
|
}
|
|
/* Oops, identical XId's on different displays! */
|
|
continue;
|
|
}
|
|
if (Entry->x_id > x_id) {
|
|
/* We have gone past where it should be. */
|
|
/* It is apparently not in the table. */
|
|
return(NULL);
|
|
}
|
|
}
|
|
/* It is apparently not in the table. */
|
|
return(NULL);
|
|
}
|
|
|