1 /* $NetBSD: strpool.c,v 1.1.1.1 2011/04/13 18:15:43 elric Exp $ */ 2 3 /* 4 * Copyright (c) 2005 Kungliga Tekniska Högskolan 5 * (Royal Institute of Technology, Stockholm, Sweden). 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * 3. Neither the name of the Institute nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <config.h> 37 38 #include <stdarg.h> 39 #include <stdlib.h> 40 #include <krb5/roken.h> 41 42 struct rk_strpool { 43 char *str; 44 size_t len; 45 }; 46 47 /* 48 * 49 */ 50 51 ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL 52 rk_strpoolfree(struct rk_strpool *p) 53 { 54 if (p->str) { 55 free(p->str); 56 p->str = NULL; 57 } 58 free(p); 59 } 60 61 /* 62 * 63 */ 64 65 ROKEN_LIB_FUNCTION struct rk_strpool * ROKEN_LIB_CALL 66 rk_strpoolprintf(struct rk_strpool *p, const char *fmt, ...) 67 { 68 va_list ap; 69 char *str, *str2; 70 int len; 71 72 if (p == NULL) { 73 p = malloc(sizeof(*p)); 74 if (p == NULL) 75 return NULL; 76 p->str = NULL; 77 p->len = 0; 78 } 79 va_start(ap, fmt); 80 len = vasprintf(&str, fmt, ap); 81 va_end(ap); 82 if (str == NULL) { 83 rk_strpoolfree(p); 84 return NULL; 85 } 86 str2 = realloc(p->str, len + p->len + 1); 87 if (str2 == NULL) { 88 rk_strpoolfree(p); 89 return NULL; 90 } 91 p->str = str2; 92 memcpy(p->str + p->len, str, len + 1); 93 p->len += len; 94 free(str); 95 return p; 96 } 97 98 /* 99 * 100 */ 101 102 ROKEN_LIB_FUNCTION char * ROKEN_LIB_CALL 103 rk_strpoolcollect(struct rk_strpool *p) 104 { 105 char *str; 106 if (p == NULL) 107 return strdup(""); 108 str = p->str; 109 p->str = NULL; 110 free(p); 111 return str; 112 } 113