[dragonfly.git] / usr.bin / window / wwalloc.c

/*	@(#)wwalloc.c	8.1 (Berkeley) 6/6/93	*/
/*	$NetBSD: wwalloc.c,v 1.6 2003/08/07 11:17:36 agc Exp $	*/

/*
 * Copyright (c) 1983, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Edward Wang at The University of California, Berkeley.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <stdlib.h>
#include "ww.h"

char **
wwalloc(int row, int col, int nrow, int ncol, int size)
{
	char *p, **pp;
	int i;

	/* fast, call malloc only once */
	pp = (char **)
		malloc((unsigned) sizeof (char **) * nrow + size * nrow * ncol);
	if (pp == 0) {
		wwerrno = WWE_NOMEM;
		return 0;
	}
	p = (char *)&pp[nrow];
	col *= size;
	size /= sizeof (char);		/* paranoid */
	size *= ncol;
	for (i = 0; i < nrow; i++) {
		pp[i] = p - col;
		p += size;
	}
	return pp - row;
}

void
wwfree(char **p, int row)
{
	free((char *)(p + row));
}
Commit	Line	Data
2c872e05	1	/* @(#)wwalloc.c 8.1 (Berkeley) 6/6/93 */
abecab39 SW	2	/* $NetBSD: wwalloc.c,v 1.6 2003/08/07 11:17:36 agc Exp $ */
abecab39 SW	3
984263bc MD	4	/*
	5	* Copyright (c) 1983, 1993
	6	* The Regents of the University of California. All rights reserved.
	7	*
	8	* This code is derived from software contributed to Berkeley by
	9	* Edward Wang at The University of California, Berkeley.
	10	*
	11	* Redistribution and use in source and binary forms, with or without
	12	* modification, are permitted provided that the following conditions
	13	* are met:
	14	* 1. Redistributions of source code must retain the above copyright
	15	* notice, this list of conditions and the following disclaimer.
	16	* 2. Redistributions in binary form must reproduce the above copyright
	17	* notice, this list of conditions and the following disclaimer in the
	18	* documentation and/or other materials provided with the distribution.
abecab39	19	* 3. Neither the name of the University nor the names of its contributors
984263bc MD	20	* may be used to endorse or promote products derived from this software
	21	* without specific prior written permission.
	22	*
	23	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	24	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	25	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	26	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	27	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	28	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	29	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	30	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	31	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	32	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	33	* SUCH DAMAGE.
	34	*/
	35
984263bc MD	36	#include <stdlib.h>
	37	#include "ww.h"
	38
	39	char **
abecab39	40	wwalloc(int row, int col, int nrow, int ncol, int size)
984263bc	41	{
abecab39 SW	42	char p, *pp;
abecab39 SW	43	int i;
984263bc MD	44
	45	/* fast, call malloc only once */
	46	pp = (char **)
	47	malloc((unsigned) sizeof (char *) nrow + size * nrow * ncol);
	48	if (pp == 0) {
	49	wwerrno = WWE_NOMEM;
	50	return 0;
	51	}
	52	p = (char *)&pp[nrow];
	53	col *= size;
	54	size /= sizeof (char); /* paranoid */
	55	size *= ncol;
	56	for (i = 0; i < nrow; i++) {
	57	pp[i] = p - col;
	58	p += size;
	59	}
	60	return pp - row;
	61	}
	62
abecab39 SW	63	void
abecab39 SW	64	wwfree(char **p, int row)
984263bc MD	65	{
	66	free((char *)(p + row));
	67	}