[bpt/emacs.git] / oldXMenu / XCrAssoc.c

/* 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);
}

/* arch-tag: 5df3237d-ada0-4345-a3ab-282cafb397aa
   (do not change this comment) */
Commit	Line	Data
e745ede7 DL	1	/* Copyright Massachusetts Institute of Technology 1985 */
	2
	3	/*
	4	Permission to use, copy, modify, distribute, and sell this software and its
	5	documentation for any purpose is hereby granted without fee, provided that
	6	the above copyright notice appear in all copies and that both that
	7	copyright notice and this permission notice appear in supporting
	8	documentation, and that the name of M.I.T. not be used in advertising or
	9	publicity pertaining to distribution of the software without specific,
	10	written prior permission. M.I.T. makes no representations about the
	11	suitability of this software for any purpose. It is provided "as is"
	12	without express or implied warranty.
	13	*/
	14
	15	#include <config.h>
	16	#include <X11/Xlib.h>
	17	#include <errno.h>
	18	#include "X10.h"
	19
	20	#ifndef NULL
	21	#define NULL 0
	22	#endif
	23
	24	extern int errno;
	25
	26	/*
	27	* XCreateAssocTable - Create an XAssocTable. The size argument should be
	28	* a power of two for efficiency reasons. Some size suggestions: use 32
	29	* buckets per 100 objects; a reasonable maximum number of object per
	30	* buckets is 8. If there is an error creating the XAssocTable, a NULL
	31	* pointer is returned.
	32	*/
	33	XAssocTable *XCreateAssocTable(size)
	34	register int size; /* Desired size of the table. */
	35	{
	36	register XAssocTable table; / XAssocTable to be initialized. */
	37	register XAssoc buckets; / Pointer to the first bucket in */
	38	/* the bucket array. */
177c0ea7	39
e745ede7 DL	40	/* Malloc the XAssocTable. */
	41	if ((table = (XAssocTable *)malloc(sizeof(XAssocTable))) == NULL) {
	42	/* malloc call failed! */
	43	errno = ENOMEM;
	44	return(NULL);
	45	}
177c0ea7	46
e745ede7 DL	47	/* calloc the buckets (actually just their headers). */
	48	buckets = (XAssoc *)calloc((unsigned)size, (unsigned)sizeof(XAssoc));
	49	if (buckets == NULL) {
	50	/* calloc call failed! */
	51	errno = ENOMEM;
	52	return(NULL);
	53	}
	54
	55	/* Insert table data into the XAssocTable structure. */
	56	table->buckets = buckets;
	57	table->size = size;
	58
	59	while (--size >= 0) {
	60	/* Initialize each bucket. */
	61	buckets->prev = buckets;
	62	buckets->next = buckets;
	63	buckets++;
	64	}
	65
	66	return(table);
	67	}
ab5796a9 MB	68
	69	/* arch-tag: 5df3237d-ada0-4345-a3ab-282cafb397aa
	70	(do not change this comment) */