1 /* $OpenBSD: savestr.c,v 1.7 2009/10/27 23:59:57 deraadt 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 #include "gnuc.h" 31 #ifdef HAVE_OS_PROTO_H 32 #include "os-proto.h" 33 #endif 34 35 #include "savestr.h" 36 37 /* A replacement for strdup() that cuts down on malloc() overhead */ 38 char * 39 savestr(register const char *str) 40 { 41 register size_t size; 42 register char *p; 43 static char *strptr = NULL; 44 static size_t strsize = 0; 45 46 size = strlen(str) + 1; 47 if (size > strsize) { 48 strsize = 1024; 49 if (strsize < size) 50 strsize = size; 51 strptr = (char *)malloc(strsize); 52 if (strptr == NULL) { 53 fprintf(stderr, "savestr: malloc\n"); 54 exit(1); 55 } 56 } 57 (void)strlcpy(strptr, str, size); 58 p = strptr; 59 strptr += size; 60 strsize -= size; 61 return (p); 62 } 63