1 /* $NetBSD: strpool.c,v 1.2 2017/01/28 21:31:50 christos 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
rk_strpoolfree(struct rk_strpool * p)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
rk_strpoolprintf(struct rk_strpool * p,const char * fmt,...)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
rk_strpoolcollect(struct rk_strpool * p)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