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1a0fe2a518
* oldXMenu/Create.c (XMenuCreate): * oldXMenu/Internal.c (_XMRecomputePane, _XMRecomputeSelection): * oldXMenu/XMakeAssoc.c (XMakeAssoc): * test/src/emacs-module-resources/mod-test.c (Fmod_test_userptr_make): Don’t assume that malloc and calloc succeed.
80 lines
2.5 KiB
C
80 lines
2.5 KiB
C
/* Copyright Massachusetts Institute of Technology 1985 */
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#include "copyright.h"
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#include "XMenuInt.h"
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#include <X11/Xresource.h>
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#include <errno.h>
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#ifndef NULL
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#define NULL 0
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#endif
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/*
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* XMakeAssoc - Insert data into an XAssocTable keyed on an XId.
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* Data is inserted into the table only once. Redundant inserts are
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* meaningless (but cause no problems). The queue in each association
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* bucket is sorted (lowest XId to highest XId).
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*/
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void
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XMakeAssoc(register Display *dpy, register XAssocTable *table, register XID x_id, register void *data)
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{
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int hash;
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register XAssoc *bucket;
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register XAssoc *Entry;
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register XAssoc *new_entry;
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/* Hash the XId to get the bucket number. */
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hash = x_id & (table->size - 1);
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/* Look up the bucket to get the entries in that bucket. */
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bucket = &table->buckets[hash];
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/* Get the first entry in the bucket. */
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Entry = bucket->next;
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/* If (Entry != bucket), the bucket is empty so make */
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/* the new entry the first entry in the bucket. */
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/* if (Entry == bucket), the we have to search the */
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/* bucket. */
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if (Entry != bucket) {
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/* The bucket isn't empty, begin searching. */
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/* If we leave the for loop then we have either passed */
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/* where the entry should be or hit the end of the bucket. */
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/* In either case we should then insert the new entry */
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/* before the current value of "Entry". */
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for (; Entry != bucket; Entry = Entry->next) {
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if (Entry->x_id == x_id) {
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/* Entry has the same XId... */
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if (Entry->display == dpy) {
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/* Entry has the same Display... */
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/* Therefore there is already an */
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/* entry with this XId and Display, */
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/* reset its data value and return. */
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Entry->data = data;
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return;
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}
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/* We found an association with the right */
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/* id but the wrong display! */
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continue;
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}
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/* If the current entry's XId is greater than the */
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/* XId of the entry to be inserted then we have */
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/* passed the location where the new XId should */
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/* be inserted. */
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if (Entry->x_id > x_id) break;
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}
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}
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/* If we are here then the new entry should be inserted just */
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/* before the current value of "Entry". */
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/* Create a new XAssoc and load it with new provided data. */
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new_entry = (XAssoc *) malloc(sizeof(XAssoc));
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if (!new_entry)
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return; /* This obsolete API has no way to report failure! */
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new_entry->display = dpy;
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new_entry->x_id = x_id;
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new_entry->data = data;
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/* Insert the new entry. */
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emacs_insque((struct qelem *)new_entry, (struct qelem *)Entry->prev);
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}
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