input/archive: export function OpenArchiveInputStream()

src/input/plugins/ArchiveInputPlugin.cxx

@@ -32,26 +32,13 @@
 
 #include <stdlib.h>
 
-/**
- * select correct archive plugin to handle the input stream
- * may allow stacking of archive plugins. for example for handling
- * tar.gz a gzip handler opens file (through inputfile stream)
- * then it opens a tar handler and sets gzip inputstream as
- * parent_stream so tar plugin fetches file data from gzip
- * plugin and gzip fetches file from disk
- */
-static InputStream *
-input_archive_open(const char *pathname,
-		   Mutex &mutex, Cond &cond,
-		   Error &error)
+InputStream *
+OpenArchiveInputStream(Path path, Mutex &mutex, Cond &cond, Error &error)
 {
 	const ArchivePlugin *arplug;
 	InputStream *is;
 
-	if (!PathTraitsFS::IsAbsolute(pathname))
-		return nullptr;
-
-	char *pname = strdup(pathname);
+	char *pname = strdup(path.c_str());
 	// archive_lookup will modify pname when true is returned
 	const char *archive, *filename, *suffix;
 	if (!archive_lookup(pname, &archive, &filename, &suffix)) {
@@ -84,6 +71,27 @@ input_archive_open(const char *pathname,
 	return is;
 }
 
+/**
+ * select correct archive plugin to handle the input stream
+ * may allow stacking of archive plugins. for example for handling
+ * tar.gz a gzip handler opens file (through inputfile stream)
+ * then it opens a tar handler and sets gzip inputstream as
+ * parent_stream so tar plugin fetches file data from gzip
+ * plugin and gzip fetches file from disk
+ */
+static InputStream *
+input_archive_open(const char *pathname,
+		   Mutex &mutex, Cond &cond,
+		   Error &error)
+{
+	if (!PathTraitsFS::IsAbsolute(pathname))
+		return nullptr;
+
+	/* TODO: the parameter is UTF-8, not filesystem charset */
+	return OpenArchiveInputStream(Path::FromFS(pathname),
+				      mutex, cond, error);
+}
+
 const InputPlugin input_plugin_archive = {
 	"archive",
 	nullptr,

src/input/plugins/ArchiveInputPlugin.hxx

@@ -20,6 +20,15 @@
 #ifndef MPD_INPUT_ARCHIVE_HXX
 #define MPD_INPUT_ARCHIVE_HXX
 
+class InputStream;
+class Path;
+class Mutex;
+class Cond;
+class Error;
+
 extern const struct InputPlugin input_plugin_archive;
 
+InputStream *
+OpenArchiveInputStream(Path path, Mutex &mutex, Cond &cond, Error &error);
+
 #endif