mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-22 07:09:54 +00:00
99 lines
3.1 KiB
C
99 lines
3.1 KiB
C
/* Copyright Massachusetts Institute of Technology 1985 */
|
|
|
|
/*
|
|
|
|
Copyright 1985, 1986, 1987 by the Massachusetts Institute of Technology
|
|
|
|
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 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 "XMenuInt.h"
|
|
#include <X11/Xresource.h>
|
|
#include <errno.h>
|
|
|
|
#ifndef NULL
|
|
#define NULL 0
|
|
#endif
|
|
|
|
/*
|
|
* XMakeAssoc - Insert data into an XAssocTable keyed on an XId.
|
|
* Data is inserted into the table only once. Redundant inserts are
|
|
* meaningless (but cause no problems). The queue in each association
|
|
* bucket is sorted (lowest XId to highest XId).
|
|
*/
|
|
void
|
|
XMakeAssoc(register Display *dpy, register XAssocTable *table, register XID x_id, register void *data)
|
|
{
|
|
int hash;
|
|
register XAssoc *bucket;
|
|
register XAssoc *Entry;
|
|
register XAssoc *new_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;
|
|
|
|
/* If (Entry != bucket), the bucket is empty so make */
|
|
/* the new entry the first entry in the bucket. */
|
|
/* if (Entry == bucket), the we have to search the */
|
|
/* bucket. */
|
|
if (Entry != bucket) {
|
|
/* The bucket isn't empty, begin searching. */
|
|
/* If we leave the for loop then we have either passed */
|
|
/* where the entry should be or hit the end of the bucket. */
|
|
/* In either case we should then insert the new entry */
|
|
/* before the current value of "Entry". */
|
|
for (; Entry != bucket; Entry = Entry->next) {
|
|
if (Entry->x_id == x_id) {
|
|
/* Entry has the same XId... */
|
|
if (Entry->display == dpy) {
|
|
/* Entry has the same Display... */
|
|
/* Therefore there is already an */
|
|
/* entry with this XId and Display, */
|
|
/* reset its data value and return. */
|
|
Entry->data = data;
|
|
return;
|
|
}
|
|
/* We found an association with the right */
|
|
/* id but the wrong display! */
|
|
continue;
|
|
}
|
|
/* If the current entry's XId is greater than the */
|
|
/* XId of the entry to be inserted then we have */
|
|
/* passed the location where the new XId should */
|
|
/* be inserted. */
|
|
if (Entry->x_id > x_id) break;
|
|
}
|
|
}
|
|
|
|
/* If we are here then the new entry should be inserted just */
|
|
/* before the current value of "Entry". */
|
|
/* Create a new XAssoc and load it with new provided data. */
|
|
new_entry = (XAssoc *) malloc(sizeof(XAssoc));
|
|
if (!new_entry)
|
|
return; /* This obsolete API has no way to report failure! */
|
|
new_entry->display = dpy;
|
|
new_entry->x_id = x_id;
|
|
new_entry->data = data;
|
|
|
|
/* Insert the new entry. */
|
|
emacs_insque((struct qelem *)new_entry, (struct qelem *)Entry->prev);
|
|
}
|