1 files changed, 301 insertions, 0 deletions
diff --git a/src/archive/bz2_archive_plugin.c b/src/archive/bz2_archive_plugin.c
new file mode 100644
index 000000000..2414eb519
--- /dev/null
+++ b/src/archive/bz2_archive_plugin.c
@@ -0,0 +1,301 @@
+/*
+ * Copyright (C) 2003-2010 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.
+ */
+
+/**
+  * single bz2 archive handling (requires libbz2)
+  */
+
+#include "config.h"
+#include "archive/bz2_archive_plugin.h"
+#include "archive_api.h"
+#include "input_plugin.h"
+#include "refcount.h"
+
+#include <stdint.h>
+#include <stddef.h>
+#include <string.h>
+#include <glib.h>
+#include <bzlib.h>
+
+#ifdef HAVE_OLDER_BZIP2
+#define BZ2_bzDecompressInit bzDecompressInit
+#define BZ2_bzDecompress bzDecompress
+#endif
+
+struct bz2_archive_file {
+	struct archive_file base;
+
+	struct refcount ref;
+
+	char *name;
+	bool reset;
+	struct input_stream *istream;
+};
+
+struct bz2_input_stream {
+	struct input_stream base;
+
+	struct bz2_archive_file *archive;
+
+	bool eof;
+
+	bz_stream bzstream;
+
+	char buffer[5000];
+};
+
+static const struct input_plugin bz2_inputplugin;
+
+static inline GQuark
+bz2_quark(void)
+{
+	return g_quark_from_static_string("bz2");
+}
+
+/* single archive handling allocation helpers */
+
+static bool
+bz2_alloc(struct bz2_input_stream *data, GError **error_r)
+{
+	int ret;
+
+	data->bzstream.bzalloc = NULL;
+	data->bzstream.bzfree  = NULL;
+	data->bzstream.opaque  = NULL;
+
+	data->bzstream.next_in = (void *) data->buffer;
+	data->bzstream.avail_in = 0;
+
+	ret = BZ2_bzDecompressInit(&data->bzstream, 0, 0);
+	if (ret != BZ_OK) {
+		g_free(data);
+
+		g_set_error(error_r, bz2_quark(), ret,
+			    "BZ2_bzDecompressInit() has failed");
+		return false;
+	}
+
+	return true;
+}
+
+static void
+bz2_destroy(struct bz2_input_stream *data)
+{
+	BZ2_bzDecompressEnd(&data->bzstream);
+}
+
+/* archive open && listing routine */
+
+static struct archive_file *
+bz2_open(const char *pathname, GError **error_r)
+{
+	struct bz2_archive_file *context;
+	int len;
+
+	context = g_malloc(sizeof(*context));
+	archive_file_init(&context->base, &bz2_archive_plugin);
+	refcount_init(&context->ref);
+
+	//open archive
+	context->istream = input_stream_open(pathname, error_r);
+	if (context->istream == NULL) {
+		g_free(context);
+		return NULL;
+	}
+
+	context->name = g_path_get_basename(pathname);
+
+	//remove suffix
+	len = strlen(context->name);
+	if (len > 4) {
+		context->name[len - 4] = 0; //remove .bz2 suffix
+	}
+
+	return &context->base;
+}
+
+static void
+bz2_scan_reset(struct archive_file *file)
+{
+	struct bz2_archive_file *context = (struct bz2_archive_file *) file;
+	context->reset = true;
+}
+
+static char *
+bz2_scan_next(struct archive_file *file)
+{
+	struct bz2_archive_file *context = (struct bz2_archive_file *) file;
+	char *name = NULL;
+
+	if (context->reset) {
+		name = context->name;
+		context->reset = false;
+	}
+
+	return name;
+}
+
+static void
+bz2_close(struct archive_file *file)
+{
+	struct bz2_archive_file *context = (struct bz2_archive_file *) file;
+
+	if (!refcount_dec(&context->ref))
+		return;
+
+	g_free(context->name);
+
+	input_stream_close(context->istream);
+	g_free(context);
+}
+
+/* single archive handling */
+
+static struct input_stream *
+bz2_open_stream(struct archive_file *file, const char *path, GError **error_r)
+{
+	struct bz2_archive_file *context = (struct bz2_archive_file *) file;
+	struct bz2_input_stream *bis = g_new(struct bz2_input_stream, 1);
+
+	input_stream_init(&bis->base, &bz2_inputplugin, path);
+
+	bis->archive = context;
+
+	bis->base.ready = true;
+	bis->base.seekable = false;
+
+	if (!bz2_alloc(bis, error_r)) {
+		input_stream_deinit(&bis->base);
+		g_free(bis);
+		return NULL;
+	}
+
+	bis->eof = false;
+
+	refcount_inc(&context->ref);
+
+	return &bis->base;
+}
+
+static void
+bz2_is_close(struct input_stream *is)
+{
+	struct bz2_input_stream *bis = (struct bz2_input_stream *)is;
+
+	bz2_destroy(bis);
+
+	bz2_close(&bis->archive->base);
+
+	input_stream_deinit(&bis->base);
+	g_free(bis);
+}
+
+static bool
+bz2_fillbuffer(struct bz2_input_stream *bis, GError **error_r)
+{
+	size_t count;
+	bz_stream *bzstream;
+
+	bzstream = &bis->bzstream;
+
+	if (bzstream->avail_in > 0)
+		return true;
+
+	count = input_stream_read(bis->archive->istream,
+				  bis->buffer, sizeof(bis->buffer),
+				  error_r);
+	if (count == 0)
+		return false;
+
+	bzstream->next_in = bis->buffer;
+	bzstream->avail_in = count;
+	return true;
+}
+
+static size_t
+bz2_is_read(struct input_stream *is, void *ptr, size_t length,
+	    GError **error_r)
+{
+	struct bz2_input_stream *bis = (struct bz2_input_stream *)is;
+	bz_stream *bzstream;
+	int bz_result;
+	size_t nbytes = 0;
+
+	if (bis->eof)
+		return 0;
+
+	bzstream = &bis->bzstream;
+	bzstream->next_out = ptr;
+	bzstream->avail_out = length;
+
+	do {
+		if (!bz2_fillbuffer(bis, error_r))
+			return 0;
+
+		bz_result = BZ2_bzDecompress(bzstream);
+
+		if (bz_result == BZ_STREAM_END) {
+			bis->eof = true;
+			break;
+		}
+
+		if (bz_result != BZ_OK) {
+			g_set_error(error_r, bz2_quark(), bz_result,
+				    "BZ2_bzDecompress() has failed");
+			return 0;
+		}
+	} while (bzstream->avail_out == length);
+
+	nbytes = length - bzstream->avail_out;
+	is->offset += nbytes;
+
+	return nbytes;
+}
+
+static bool
+bz2_is_eof(struct input_stream *is)
+{
+	struct bz2_input_stream *bis = (struct bz2_input_stream *)is;
+
+	return bis->eof;
+}
+
+/* exported structures */
+
+static const char *const bz2_extensions[] = {
+	"bz2",
+	NULL
+};
+
+static const struct input_plugin bz2_inputplugin = {
+	.close = bz2_is_close,
+	.read = bz2_is_read,
+	.eof = bz2_is_eof,
+};
+
+const struct archive_plugin bz2_archive_plugin = {
+	.name = "bz2",
+	.open = bz2_open,
+	.scan_reset = bz2_scan_reset,
+	.scan_next = bz2_scan_next,
+	.open_stream = bz2_open_stream,
+	.close = bz2_close,
+	.suffixes = bz2_extensions
+};
+