X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=midi_mapper.cpp;h=392fac4b82b89b7570fa736f4b5566bff935752d;hb=cf729d2ddd503b90413987bf94a928ae31efe0d0;hp=27e843ee33e7b2f2cfb02a3a6ed68656e8884d53;hpb=afe996bc7dfc8689ca356d00824fbfcd632f93a2;p=nageru

diff --git a/midi_mapper.cpp b/midi_mapper.cpp
index 27e843e..392fac4 100644
--- a/midi_mapper.cpp
+++ b/midi_mapper.cpp
@@ -64,6 +64,26 @@ bool load_midi_mapping_from_file(const string &filename, MIDIMappingProto *new_m
 	return true;
 }
 
+bool save_midi_mapping_to_file(const MIDIMappingProto &mapping_proto, const string &filename)
+{
+	// Save to disk. We use the text format because it's friendlier
+	// for a user to look at and edit.
+	int fd = open(filename.c_str(), O_WRONLY | O_TRUNC | O_CREAT, 0666);
+	if (fd == -1) {
+		perror(filename.c_str());
+		return false;
+	}
+	io::FileOutputStream output(fd);  // Takes ownership of fd.
+	if (!TextFormat::Print(mapping_proto, &output)) {
+		// TODO: Don't overwrite the old file (if any) on error.
+		output.Close();
+		return false;
+	}
+
+	output.Close();
+	return true;
+}
+
 void MIDIMapper::set_midi_mapping(const MIDIMappingProto &new_mapping)
 {
 	lock_guard<mutex> lock(mapping_mu);