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/* $OpenBSD: savestr.c,v 1.4 2003/04/02 20:42:22 millert Exp $ */
/*
* Copyright (c) 1997
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
static const char rcsid[] =
"@(#) $Header: /cvs/OpenBSD/src/usr.sbin/tcpdump/savestr.c,v 1.4 2003/04/02 20:42:22 millert Exp $ (LBL)";
#endif
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "gnuc.h"
#ifdef HAVE_OS_PROTO_H
#include "os-proto.h"
#endif
#include "savestr.h"
/* A replacement for strdup() that cuts down on malloc() overhead */
char *
savestr(register const char *str)
{
register size_t size;
register char *p;
static char *strptr = NULL;
static size_t strsize = 0;
size = strlen(str) + 1;
if (size > strsize) {
strsize = 1024;
if (strsize < size)
strsize = size;
strptr = strptr ? realloc(strptr, strsize) : malloc(strsize);
if (strptr == NULL) {
fprintf(stderr, "savestr: cannot allocate memory\n");
exit(1);
}
}
(void)strlcpy(strptr, str, size);
p = strptr;
strptr += size;
strsize -= size;
return (p);
}
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