archiveapi: archive plugin for ZIP files

configure.ac

@@ -182,6 +182,14 @@ AC_ARG_ENABLE(bz2,
 
 AM_CONDITIONAL(HAVE_BZ2, test x$enable_bz2 = xyes)
 
+AC_ARG_ENABLE(zip,
+	AS_HELP_STRING([--enable-zip],
+		[enable zip archive support (default: disabled)]),
+	enable_zip=$enableval,
+	enable_zip=no)
+
+AM_CONDITIONAL(HAVE_ZIP, test x$enable_zip = xyes)
+
 # archive plugin libraries
 
 AC_CHECK_LIB(bz2, BZ2_bzDecompressInit,[MPD_LIBS="-lbz2";],enable_bz2=no)
@@ -189,6 +197,11 @@ if test x$enable_bz2 = xyes; then
 	AC_DEFINE(HAVE_BZ2, 1, [Define to have bz2 archive support])
 fi
 
+AC_CHECK_LIB(zzip, zzip_dir_open,[MPD_LIBS="-lzzip";],enable_zip=no)
+if test x$enable_zip = xyes; then
+	AC_DEFINE(HAVE_ZIP, 1, [Define to have zip archive support])
+fi
+
 dnl
 dnl decoder plugins
 dnl
@@ -1171,6 +1184,12 @@ else
 	echo " BZ2 archives support ..........disabled"
 fi
 
+if test x$enable_zip = xyes; then
+	echo " ZIP archives support ..........enabled"
+else
+	echo " ZIP archives support ..........disabled"
+fi
+
 echo ""
 echo "##########################################"
 echo ""

src/Makefile.am

@@ -179,6 +179,9 @@ if HAVE_BZ2
 mpd_SOURCES += archive/bz2_plugin.c
 endif
 
+if HAVE_ZIP
+mpd_SOURCES += archive/zip_plugin.c
+endif
 
 # decoder plugins
 

src/archive/zip_plugin.c

@@ -0,0 +1,196 @@
+/* the Music Player Daemon (MPD)
+ * Copyright (C) 2008 Viliam Mateicka <viliam.mateicka@gmail.com>
+ * This project's homepage is: 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+/**
+  * zip archive handling (requires zziplib)
+  */
+
+#include "archive_api.h"
+#include "archive_api.h"
+#include "input_stream.h"
+#include "utils.h"
+
+#include <zzip/zzip.h>
+#include <glib.h>
+#include <string.h>
+
+typedef struct {
+	ZZIP_DIR *dir;
+	ZZIP_FILE *file;
+	size_t	length;
+	GSList	*list;
+	GSList	*iter;
+} zip_context;
+
+static const struct input_plugin zip_inputplugin;
+
+/* archive open && listing routine */
+
+static struct archive_file *
+zip_open(char * pathname)
+{
+	zip_context *context = g_malloc(sizeof(zip_context));
+	ZZIP_DIRENT dirent;
+
+	// open archive
+	context->list = NULL;
+	context->dir = zzip_dir_open(pathname, 0);
+	if (context->dir  == NULL) {
+		g_warning("zipfile %s open failed\n", pathname);
+		return NULL;
+	}
+
+	while (zzip_dir_read(context->dir, &dirent)) {
+		context->list = g_slist_prepend( context->list, xstrdup(dirent.d_name));
+	}
+
+	return (struct archive_file *)context;
+}
+
+static void
+zip_scan_reset(struct archive_file *file)
+{
+	zip_context *context = (zip_context *) file;
+	//reset iterator
+	context->iter = context->list;
+}
+
+static char *
+zip_scan_next(struct archive_file *file)
+{
+	zip_context *context = (zip_context *) file;
+	char *data = NULL;
+	if (context->iter != NULL) {
+		///fetch data and goto next
+		data = context->iter->data;
+		context->iter = g_slist_next(context->iter);
+	}
+	return data;
+}
+
+static void
+zip_close(struct archive_file *file)
+{
+	zip_context *context = (zip_context *) file;
+	if (context->list) {
+		//free list
+		for (GSList *tmp = context->list; tmp != NULL; tmp = g_slist_next(tmp))
+			g_free(tmp->data);
+		g_slist_free(context->list);
+	}
+	//close archive
+	zzip_dir_close (context->dir);
+	context->dir = NULL;
+}
+
+/* single archive handling */
+
+static void
+zip_setup_stream(struct archive_file *file, struct input_stream *is)
+{
+	zip_context *context = (zip_context *) file;
+	//setup file ops
+	is->plugin = &zip_inputplugin;
+	//insert back reference
+	is->archive = context;
+	//we are not seekable
+	is->seekable = false;
+}
+
+
+static bool
+zip_is_open(struct input_stream *is, const char *pathname)
+{
+	zip_context *context = (zip_context *) is->archive;
+	ZZIP_STAT z_stat;
+
+	context->file = zzip_file_open(context->dir, pathname, 0);
+	if (!context->file) {
+		g_warning("file %s not found in the zipfile\n", pathname);
+		return false;
+	}
+	zzip_file_stat(context->file, &z_stat);
+	context->length = z_stat.st_size;
+	return true;
+}
+
+static void
+zip_is_close(struct input_stream *is)
+{
+	zip_context *context = (zip_context *) is->archive;
+	zzip_file_close (context->file);
+}
+
+static size_t
+zip_is_read(struct input_stream *is, void *ptr, size_t size)
+{
+	zip_context *context = (zip_context *) is->archive;
+	int ret;
+	ret = zzip_file_read(context->file, ptr, size);
+	if (ret < 0) {
+		g_warning("error %d reading zipfile\n", ret);
+		return 0;
+	}
+	return ret;
+}
+
+static bool
+zip_is_eof(struct input_stream *is)
+{
+	zip_context *context = (zip_context *) is->archive;
+	return ((size_t) zzip_tell(context->file) == context->length);
+}
+
+static bool
+zip_is_seek(G_GNUC_UNUSED struct input_stream *is,
+	G_GNUC_UNUSED off_t offset, G_GNUC_UNUSED int whence)
+{
+	return false;
+}
+
+static int
+zip_is_buffer(G_GNUC_UNUSED struct input_stream *is)
+{
+	return 0;
+}
+
+/* exported structures */
+
+static const char *const zip_extensions[] = {
+	"zip",
+	NULL
+};
+
+static const struct input_plugin zip_inputplugin = {
+	.open = zip_is_open,
+	.close = zip_is_close,
+	.read = zip_is_read,
+	.eof = zip_is_eof,
+	.seek = zip_is_seek,
+	.buffer = zip_is_buffer
+};
+
+const struct archive_plugin zip_plugin = {
+	.name = "zip",
+	.open = zip_open,
+	.scan_reset = zip_scan_reset,
+	.scan_next = zip_scan_next,
+	.setup_stream = zip_setup_stream,
+	.close = zip_close,
+	.suffixes = zip_extensions
+};

src/archive_list.c

@@ -28,10 +28,14 @@
 #include <glib.h>
 
 extern const struct archive_plugin bz2_plugin;
+extern const struct archive_plugin zip_plugin;
 
 static const struct archive_plugin *const archive_plugins[] = {
 #ifdef HAVE_BZ2
 	&bz2_plugin,
+#endif
+#ifdef HAVE_ZIP
+	&zip_plugin,
 #endif
 	NULL
 };