mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-15 09:47:20 +00:00
69 lines
2.0 KiB
C
69 lines
2.0 KiB
C
/* $XConsortium: XCrAssoc.c,v 10.17 91/01/06 12:04:57 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 <config.h>
|
|
#include <X11/Xlib.h>
|
|
#include <errno.h>
|
|
#include "X10.h"
|
|
|
|
#ifndef NULL
|
|
#define NULL 0
|
|
#endif
|
|
|
|
extern int errno;
|
|
|
|
/*
|
|
* 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(size)
|
|
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);
|
|
}
|