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Annotation of 43BSDReno/usr.bin/window/wwalloc.c, revision 1.1.1.1

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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