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[unix-history] / usr / src / usr.bin / window / wwalloc.c

#ifndef lint
static char sccsid[] = "@(#)wwalloc.c   3.7 %G%";
#endif

/*
* Copyright (c) 1983 Regents of the University of California,
* All rights reserved.  Redistribution permitted subject to
* the terms of the Berkeley Software License Agreement.
*/

#include "ww.h"

char **
wwalloc(row, col, nrow, ncol, size)
{
       register char *p, **pp;
       register 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;
}

wwfree(p, row)
register char **p;
{
       free((char *)(p + row));
}