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https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
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rename src to polyp
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@90 fefdeb5f-60dc-0310-8127-8f9354f1896f
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164
src/strbuf.c
164
src/strbuf.c
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/* $Id$ */
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/***
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This file is part of polypaudio.
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polypaudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published
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by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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polypaudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with polypaudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <sys/types.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <string.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include "strbuf.h"
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struct chunk {
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struct chunk *next;
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size_t length;
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char text[];
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};
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struct pa_strbuf {
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size_t length;
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struct chunk *head, *tail;
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};
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struct pa_strbuf *pa_strbuf_new(void) {
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struct pa_strbuf *sb = malloc(sizeof(struct pa_strbuf));
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assert(sb);
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sb->length = 0;
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sb->head = sb->tail = NULL;
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return sb;
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}
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void pa_strbuf_free(struct pa_strbuf *sb) {
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assert(sb);
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while (sb->head) {
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struct chunk *c = sb->head;
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sb->head = sb->head->next;
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free(c);
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}
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free(sb);
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}
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char *pa_strbuf_tostring(struct pa_strbuf *sb) {
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char *t, *e;
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struct chunk *c;
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assert(sb);
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t = malloc(sb->length+1);
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assert(t);
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e = t;
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for (c = sb->head; c; c = c->next) {
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memcpy(e, c->text, c->length);
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e += c->length;
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}
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*e = 0;
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return t;
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}
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char *pa_strbuf_tostring_free(struct pa_strbuf *sb) {
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char *t;
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assert(sb);
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t = pa_strbuf_tostring(sb);
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pa_strbuf_free(sb);
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return t;
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}
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void pa_strbuf_puts(struct pa_strbuf *sb, const char *t) {
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assert(sb && t);
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pa_strbuf_putsn(sb, t, strlen(t));
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}
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void pa_strbuf_putsn(struct pa_strbuf *sb, const char *t, size_t l) {
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struct chunk *c;
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assert(sb && t);
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if (!l)
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return;
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c = malloc(sizeof(struct chunk)+l);
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assert(c);
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c->next = NULL;
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c->length = l;
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memcpy(c->text, t, l);
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if (sb->tail) {
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assert(sb->head);
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sb->tail->next = c;
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} else {
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assert(!sb->head);
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sb->head = c;
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}
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sb->tail = c;
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sb->length += l;
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}
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/* The following is based on an example from the GNU libc documentation */
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int pa_strbuf_printf(struct pa_strbuf *sb, const char *format, ...) {
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int r, size = 100;
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struct chunk *c = NULL;
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assert(sb);
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for(;;) {
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va_list ap;
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c = realloc(c, sizeof(struct chunk)+size);
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assert(c);
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va_start(ap, format);
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r = vsnprintf(c->text, size, format, ap);
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va_end(ap);
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if (r > -1 && r < size) {
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c->length = r;
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c->next = NULL;
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if (sb->tail) {
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assert(sb->head);
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sb->tail->next = c;
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} else {
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assert(!sb->head);
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sb->head = c;
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}
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sb->tail = c;
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sb->length += r;
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return r;
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}
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if (r > -1) /* glibc 2.1 */
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size = r+1;
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else /* glibc 2.0 */
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size *= 2;
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}
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}
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