DatabaseSelection: use std::string

src/DatabaseSelection.hxx

@@ -22,7 +22,7 @@
 
 #include "Compiler.h"
 
-#include <assert.h>
+#include <string>
 
 class SongFilter;
 struct Song;
@@ -30,10 +30,9 @@ struct Song;
 struct DatabaseSelection {
 	/**
 	 * The base URI of the search (UTF-8).  Must not begin or end
-	 * with a slash.  nullptr or an empty string searches the whole
-	 * database.
+	 * with a slash.  An empty string searches the whole database.
 	 */
-	const char *uri;
+	std::string uri;
 
 	/**
 	 * Recursively search all sub directories?
@@ -45,7 +44,6 @@ struct DatabaseSelection {
 	DatabaseSelection(const char *_uri, bool _recursive,
 			  const SongFilter *_filter=nullptr)
 		:uri(_uri), recursive(_recursive), filter(_filter) {
-		assert(uri != nullptr);
 	}
 
 	gcc_pure

src/db/ProxyDatabasePlugin.cxx

@@ -398,7 +398,7 @@ ProxyDatabase::Visit(const DatabaseSelection &selection,
 	// TODO: match
 	// TODO: auto-reconnect
 
-	return ::Visit(connection, selection.uri, selection.recursive,
+	return ::Visit(connection, selection.uri.c_str(), selection.recursive,
 		       visit_directory, visit_song, visit_playlist,
 		       error);
 }

src/db/SimpleDatabasePlugin.cxx

@@ -239,10 +239,10 @@ SimpleDatabase::Visit(const DatabaseSelection &selection,
 {
 	ScopeDatabaseLock protect;
 
-	const Directory *directory = root->LookupDirectory(selection.uri);
+	const Directory *directory = root->LookupDirectory(selection.uri.c_str());
 	if (directory == nullptr) {
 		if (visit_song) {
-			Song *song = root->LookupSong(selection.uri);
+			Song *song = root->LookupSong(selection.uri.c_str());
 			if (song != nullptr)
 				return !selection.Match(*song) ||
 					visit_song(*song, error);