usr.bin/window/wwalloc.c

   1 /*      @(#)wwalloc.c   8.1 (Berkeley) 6/6/93   */
   2 /*      $NetBSD: wwalloc.c,v 1.6 2003/08/07 11:17:36 agc Exp $  */
   3
   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.
  19  * 3. Neither the name of the University nor the names of its contributors
  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
  36 #include <stdlib.h>
  37 #include "ww.h"
  38
  39 char **
  40 wwalloc(int row, int col, int nrow, int ncol, int size)
  41 {
  42         char *p, **pp;
  43         int i;
  44
  45         /* fast, call malloc only once */
  46         pp = (char **)
  47                 malloc((unsigned) sizeof (char **) * nrow + size * nrow * ncol);
  48         if (pp == NULL) {
  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
  63 void
  64 wwfree(char **p, int row)
  65 {
  66         free((char *)(p + row));
  67 }