From dbb1e732b83645156ced0075444b1f309b66209c Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@duempel.org>
Date: Mon, 12 Oct 2009 22:30:59 +0200
Subject: [PATCH] text_input_stream: input_stream wrapper for reading text
files
---
Makefile.am | 2 +
src/text_input_stream.c | 88 +++++++++++++++++++++++++++++++++++++++++
src/text_input_stream.h | 52 ++++++++++++++++++++++++
3 files changed, 142 insertions(+)
create mode 100644 src/text_input_stream.c
create mode 100644 src/text_input_stream.h
diff --git a/Makefile.am b/Makefile.am
index ec5f6bac4..c2f0fcf60 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -88,6 +88,7 @@ mpd_headers = \
src/input/curl_input_plugin.h \
src/input/lastfm_input_plugin.h \
src/input/mms_input_plugin.h \
+ src/text_input_stream.h \
src/icy_server.h \
src/icy_metadata.h \
src/client.h \
@@ -271,6 +272,7 @@ src_mpd_SOURCES = \
src/tag_print.c \
src/tag_save.c \
src/tokenizer.c \
+ src/text_input_stream.c \
src/strset.c \
src/uri.c \
src/utils.c \
diff --git a/src/text_input_stream.c b/src/text_input_stream.c
new file mode 100644
index 000000000..ec81c9a27
--- /dev/null
+++ b/src/text_input_stream.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2003-2009 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "text_input_stream.h"
+#include "input_stream.h"
+#include "fifo_buffer.h"
+
+#include <glib.h>
+
+#include <string.h>
+
+struct text_input_stream {
+ struct input_stream *is;
+
+ struct fifo_buffer *buffer;
+
+ char *line;
+};
+
+struct text_input_stream *
+text_input_stream_new(struct input_stream *is)
+{
+ struct text_input_stream *tis = g_new(struct text_input_stream, 1);
+
+ tis->is = is;
+ tis->buffer = fifo_buffer_new(4096);
+ tis->line = NULL;
+
+ return tis;
+}
+
+void
+text_input_stream_free(struct text_input_stream *tis)
+{
+ fifo_buffer_free(tis->buffer);
+ g_free(tis->line);
+ g_free(tis);
+}
+
+const char *
+text_input_stream_read(struct text_input_stream *tis)
+{
+ void *dest;
+ const char *src, *p;
+ size_t length, nbytes;
+
+ g_free(tis->line);
+ tis->line = NULL;
+
+ do {
+ dest = fifo_buffer_write(tis->buffer, &length);
+ if (dest != NULL) {
+ nbytes = input_stream_read(tis->is, dest, length);
+ if (nbytes > 0)
+ fifo_buffer_append(tis->buffer, nbytes);
+ }
+
+ src = fifo_buffer_read(tis->buffer, &length);
+ if (src == NULL)
+ return NULL;
+
+ p = memchr(src, '\n', length);
+ } while (p == NULL);
+
+ length = p - src + 1;
+ while (p > src && g_ascii_isspace(p[-1]))
+ --p;
+
+ tis->line = g_strndup(src, p - src);
+ fifo_buffer_consume(tis->buffer, length);
+ return tis->line;
+}
diff --git a/src/text_input_stream.h b/src/text_input_stream.h
new file mode 100644
index 000000000..2b93ae180
--- /dev/null
+++ b/src/text_input_stream.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2003-2009 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_TEXT_INPUT_STREAM_H
+#define MPD_TEXT_INPUT_STREAM_H
+
+struct input_stream;
+struct text_input_stream;
+
+/**
+ * Wraps an existing #input_stream object into a #text_input_stream,
+ * to read its contents as text lines.
+ *
+ * @param is an open #input_stream object
+ * @return the new #text_input_stream object
+ */
+struct text_input_stream *
+text_input_stream_new(struct input_stream *is);
+
+/**
+ * Frees the #text_input_stream object. Does not close or free the
+ * underlying #input_stream.
+ */
+void
+text_input_stream_free(struct text_input_stream *tis);
+
+/**
+ * Reads the next line from the stream.
+ *
+ * @return a line (newline character stripped), or NULL on end of file
+ * or error
+ */
+const char *
+text_input_stream_read(struct text_input_stream *tis);
+
+#endif