Make the save and load buttons in the MIDI mapping edit dialog work.

[nageru] / midi_mapper.cpp

diff --git a/midi_mapper.cpp b/midi_mapper.cpp
index 27e843ee33e7b2f2cfb02a3a6ed68656e8884d53..392fac4b82b89b7570fa736f4b5566bff935752d 100644 (file)
--- 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);