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Annotation of 43BSDReno/usr.bin/window/wwalloc.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1983 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * This code is derived from software contributed to Berkeley by
        !             6:  * Edward Wang at The University of California, Berkeley.
        !             7:  *
        !             8:  * Redistribution and use in source and binary forms are permitted provided
        !             9:  * that: (1) source distributions retain this entire copyright notice and
        !            10:  * comment, and (2) distributions including binaries display the following
        !            11:  * acknowledgement:  ``This product includes software developed by the
        !            12:  * University of California, Berkeley and its contributors'' in the
        !            13:  * documentation or other materials provided with the distribution and in
        !            14:  * all advertising materials mentioning features or use of this software.
        !            15:  * Neither the name of the University nor the names of its contributors may
        !            16:  * be used to endorse or promote products derived from this software without
        !            17:  * specific prior written permission.
        !            18:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            19:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            20:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            21:  */
        !            22: 
        !            23: #ifndef lint
        !            24: static char sccsid[] = "@(#)wwalloc.c  3.11 (Berkeley) 6/6/90";
        !            25: #endif /* not lint */
        !            26: 
        !            27: #include "ww.h"
        !            28: 
        !            29: char **
        !            30: wwalloc(row, col, nrow, ncol, size)
        !            31: {
        !            32:        register char *p, **pp;
        !            33:        register int i;
        !            34: 
        !            35:        /* fast, call malloc only once */
        !            36:        pp = (char **)
        !            37:                malloc((unsigned) sizeof (char **) * nrow + size * nrow * ncol);
        !            38:        if (pp == 0) {
        !            39:                wwerrno = WWE_NOMEM;
        !            40:                return 0;
        !            41:        }
        !            42:        p = (char *)&pp[nrow];
        !            43:        col *= size;
        !            44:        size /= sizeof (char);          /* paranoid */
        !            45:        size *= ncol;
        !            46:        for (i = 0; i < nrow; i++) {
        !            47:                pp[i] = p - col;
        !            48:                p += size;
        !            49:        }
        !            50:        return pp - row;
        !            51: }
        !            52: 
        !            53: wwfree(p, row)
        !            54: register char **p;
        !            55: {
        !            56:        free((char *)(p + row));
        !            57: }

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