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/* Copyright Massachusetts Institute of Technology 1985 */
#include "copyright.h"
#include <config.h>
#include <stdlib.h>
#include <X11/Xlib.h>
#include <errno.h>
#include "X10.h"
#ifndef NULL
#define NULL 0
#endif
/*
* XCreateAssocTable - Create an XAssocTable. The size argument should be
* a power of two for efficiency reasons. Some size suggestions: use 32
* buckets per 100 objects; a reasonable maximum number of object per
* buckets is 8. If there is an error creating the XAssocTable, a NULL
* pointer is returned.
*/
XAssocTable *XCreateAssocTable(register int size)
/* Desired size of the table. */
{
register XAssocTable *table; /* XAssocTable to be initialized. */
register XAssoc *buckets; /* Pointer to the first bucket in */
/* the bucket array. */
/* Malloc the XAssocTable. */
if ((table = (XAssocTable *)malloc(sizeof(XAssocTable))) == NULL) {
/* malloc call failed! */
errno = ENOMEM;
return(NULL);
}
/* calloc the buckets (actually just their headers). */
buckets = (XAssoc *)calloc((unsigned)size, (unsigned)sizeof(XAssoc));
if (buckets == NULL) {
/* calloc call failed! */
errno = ENOMEM;
return(NULL);
}
/* Insert table data into the XAssocTable structure. */
table->buckets = buckets;
table->size = size;
while (--size >= 0) {
/* Initialize each bucket. */
buckets->prev = buckets;
buckets->next = buckets;
buckets++;
}
return(table);
}
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