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Annotation of src/usr.bin/window/wwalloc.c, Revision 1.5

1.5     ! mpech       1: /*     $OpenBSD: wwalloc.c,v 1.4 1998/04/26 22:49:03 millert Exp $     */
1.1       deraadt     2: /*     $NetBSD: wwalloc.c,v 1.3 1995/09/28 10:35:10 tls 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. All advertising materials mentioning features or use of this software
                     20:  *    must display the following acknowledgement:
                     21:  *     This product includes software developed by the University of
                     22:  *     California, Berkeley and its contributors.
                     23:  * 4. Neither the name of the University nor the names of its contributors
                     24:  *    may be used to endorse or promote products derived from this software
                     25:  *    without specific prior written permission.
                     26:  *
                     27:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     28:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     29:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     30:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     31:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     32:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     33:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     34:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     35:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     36:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     37:  * SUCH DAMAGE.
                     38:  */
                     39:
                     40: #ifndef lint
                     41: #if 0
                     42: static char sccsid[] = "@(#)wwalloc.c  8.1 (Berkeley) 6/6/93";
                     43: #else
1.5     ! mpech      44: static char rcsid[] = "$OpenBSD: wwalloc.c,v 1.4 1998/04/26 22:49:03 millert Exp $";
1.1       deraadt    45: #endif
                     46: #endif /* not lint */
                     47:
1.4       millert    48: #include <stdlib.h>
1.1       deraadt    49: #include "ww.h"
                     50:
                     51: char **
                     52: wwalloc(row, col, nrow, ncol, size)
1.4       millert    53:        int row, col, nrow, ncol;
                     54:        size_t size;
1.1       deraadt    55: {
1.5     ! mpech      56:        char *p, **pp;
        !            57:        int i;
1.1       deraadt    58:
                     59:        /* fast, call malloc only once */
                     60:        pp = (char **)
1.4       millert    61:                malloc(sizeof (char **) * nrow + size * nrow * ncol);
1.1       deraadt    62:        if (pp == 0) {
                     63:                wwerrno = WWE_NOMEM;
                     64:                return 0;
                     65:        }
                     66:        p = (char *)&pp[nrow];
                     67:        col *= size;
                     68:        size /= sizeof (char);          /* paranoid */
                     69:        size *= ncol;
                     70:        for (i = 0; i < nrow; i++) {
                     71:                pp[i] = p - col;
                     72:                p += size;
                     73:        }
                     74:        return pp - row;
                     75: }
                     76:
                     77: wwfree(p, row)
1.5     ! mpech      78: char **p;
1.1       deraadt    79: {
                     80:        free((char *)(p + row));
                     81: }