1/*
2 * Copyright (c) 2005 Kungliga Tekniska H��gskolan
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
40struct rk_strpool {
41    char *str;
42    size_t len;
43};
44
45/*
46 *
47 */
48
49ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
50rk_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
63ROKEN_LIB_FUNCTION struct rk_strpool * ROKEN_LIB_CALL
64rk_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
100ROKEN_LIB_FUNCTION char * ROKEN_LIB_CALL
101rk_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