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