root/trunk/oldXMenu/XDelAssoc.c

/* Copyright    Massachusetts Institute of Technology    1985   */

#include "copyright.h"


#include <X11/Xlib.h>
#include "X10.h"
void emacs_remque();
struct qelem {
        struct    qelem *q_forw;
        struct    qelem *q_back;
        char q_data[1];
};

/*
 * XDeleteAssoc - Delete an association in an XAssocTable keyed on
 * an XId.  An association may be removed only once.  Redundant
 * deletes are meaningless (but cause no problems).
 */
XDeleteAssoc(dpy, table, x_id)
        register Display *dpy;
        register XAssocTable *table;
        register XID x_id;
{
        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! */
                                /* Remove it from the queue and */
                                /* free the entry. */
                                emacs_remque((struct qelem *)Entry);
                                free((char *)Entry);
                                return;
                        }
                        /* 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;
                }
        }
        /* It is apparently not in the table. */
        return;
}

/* arch-tag: 90981a7e-601c-487a-b364-cdf55d6c475b
   (do not change this comment) */