1 /* $OpenBSD: savestr.c,v 1.10 2015/11/16 00:16:39 mmcc Exp $ */
2
3 /*
4 * Copyright (c) 1997
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that: (1) source code distributions
9 * retain the above copyright notice and this paragraph in its entirety, (2)
10 * distributions including binary code include the above copyright notice and
11 * this paragraph in its entirety in the documentation or other materials
12 * provided with the distribution, and (3) all advertising materials mentioning
13 * features or use of this software display the following acknowledgement:
14 * ``This product includes software developed by the University of California,
15 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
16 * the University nor the names of its contributors may be used to endorse
17 * or promote products derived from this software without specific prior
18 * written permission.
19 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
20 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
22 */
23
24 #include <sys/types.h>
25
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <string.h>
29
30 #ifdef HAVE_OS_PROTO_H
31 #include "os-proto.h"
32 #endif
33
34 #include "savestr.h"
35
36 /* A replacement for strdup() that cuts down on malloc() overhead */
37 char *
savestr(const char * str)38 savestr(const char *str)
39 {
40 size_t size;
41 char *p;
42 static char *strptr = NULL;
43 static size_t strsize = 0;
44
45 size = strlen(str) + 1;
46 if (size > strsize) {
47 strsize = 1024;
48 if (strsize < size)
49 strsize = size;
50 strptr = malloc(strsize);
51 if (strptr == NULL) {
52 fprintf(stderr, "savestr: malloc\n");
53 exit(1);
54 }
55 }
56 (void)strlcpy(strptr, str, size);
57 p = strptr;
58 strptr += size;
59 strsize -= size;
60 return (p);
61 }
62