4 This file is part of PulseAudio.
6 Copyright 2004-2006 Lennart Poettering
8 PulseAudio is free software; you can redistribute it and/or modify
9 it under the terms of the GNU Lesser General Public License as published
10 by the Free Software Foundation; either version 2 of the License,
11 or (at your option) any later version.
13 PulseAudio is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with PulseAudio; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
28 #include <sys/types.h>
34 #include <pulse/xmalloc.h>
35 #include <pulsecore/macro.h>
39 /* A chunk of the linked list that makes up the string */
45 #define CHUNK_TO_TEXT(c) ((char*) (c) + PA_ALIGN(sizeof(struct chunk)))
49 struct chunk *head, *tail;
52 pa_strbuf *pa_strbuf_new(void) {
55 sb = pa_xnew(pa_strbuf, 1);
57 sb->head = sb->tail = NULL;
62 void pa_strbuf_free(pa_strbuf *sb) {
66 struct chunk *c = sb->head;
67 sb->head = sb->head->next;
74 /* Make a C string from the string buffer. The caller has to free
75 * string with pa_xfree(). */
76 char *pa_strbuf_tostring(pa_strbuf *sb) {
82 e = t = pa_xnew(char, sb->length+1);
84 for (c = sb->head; c; c = c->next) {
85 pa_assert((size_t) (e-t) <= sb->length);
86 memcpy(e, CHUNK_TO_TEXT(c), c->length);
93 pa_assert(e == t+sb->length);
98 /* Combination of pa_strbuf_free() and pa_strbuf_tostring() */
99 char *pa_strbuf_tostring_free(pa_strbuf *sb) {
103 t = pa_strbuf_tostring(sb);
109 /* Append a string to the string buffer */
110 void pa_strbuf_puts(pa_strbuf *sb, const char *t) {
115 pa_strbuf_putsn(sb, t, strlen(t));
118 /* Append a new chunk to the linked list */
119 static void append(pa_strbuf *sb, struct chunk *c) {
127 pa_assert(!sb->head);
132 sb->length += c->length;
136 /* Append up to l bytes of a string to the string buffer */
137 void pa_strbuf_putsn(pa_strbuf *sb, const char *t, size_t l) {
146 c = pa_xmalloc(PA_ALIGN(sizeof(struct chunk)) + l);
148 memcpy(CHUNK_TO_TEXT(c), t, l);
153 /* Append a printf() style formatted string to the string buffer. */
154 /* The following is based on an example from the GNU libc documentation */
155 int pa_strbuf_printf(pa_strbuf *sb, const char *format, ...) {
157 struct chunk *c = NULL;
166 c = pa_xrealloc(c, PA_ALIGN(sizeof(struct chunk)) + size);
168 va_start(ap, format);
169 r = vsnprintf(CHUNK_TO_TEXT(c), size, format, ap);
170 CHUNK_TO_TEXT(c)[size-1] = 0;
173 if (r > -1 && r < size) {
179 if (r > -1) /* glibc 2.1 */