support for multiple composer, performer and disc tags

src/libmpdclient.c

@@ -1243,17 +1243,35 @@ mpd_InfoEntity * mpd_getNextInfoEntity(mpd_Connection * connection) {
 					strcmp(re->name, "Genre") == 0) {
 				entity->info.song->genre = str_pool_dup(re->value);
 			}
-			else if(!entity->info.song->composer &&
+			else if(strcmp(re->name, "Composer") == 0) {
-					strcmp(re->name, "Composer") == 0) {
+				char *tmp = 0;
-				entity->info.song->composer = str_pool_dup(re->value);
+				if (entity->info.song->composer) {
-			}
+					tmp = malloc(strlen(entity->info.song->composer) + strlen(re->value) + 3);
-			else if(!entity->info.song->performer &&
+					sprintf(tmp, "%s, %s", entity->info.song->composer, re->value);
-					strcmp(re->name, "Performer") == 0) {
+					str_pool_put(entity->info.song->composer);
-				entity->info.song->performer = str_pool_dup(re->value);
+				}
-			}
+				entity->info.song->composer = tmp ? str_pool_get(tmp) : str_pool_dup(re->value);
-			else if(!entity->info.song->disc &&
+				free(tmp);
-					strcmp(re->name, "Disc") == 0) {
+			}
-				entity->info.song->disc = str_pool_dup(re->value);
+			else if(strcmp(re->name, "Performer") == 0) {
+				char *tmp = 0;
+				if (entity->info.song->performer) {
+					tmp = malloc(strlen(entity->info.song->performer) + strlen(re->value) + 3);
+					sprintf(tmp, "%s, %s", entity->info.song->performer, re->value);
+					str_pool_put(entity->info.song->performer);
+				}
+				entity->info.song->performer = tmp ? str_pool_get(tmp) : str_pool_dup(re->value);
+				free(tmp);
+			}
+			else if(strcmp(re->name, "Disc") == 0) {
+				char *tmp = 0;
+				if (entity->info.song->disc) {
+					tmp = malloc(strlen(entity->info.song->disc) + strlen(re->value) + 3);
+					sprintf(tmp, "%s, %s", entity->info.song->disc, re->value);
+					str_pool_put(entity->info.song->disc);
+				}
+				entity->info.song->disc = tmp ? str_pool_get(tmp) : str_pool_dup(re->value);
+				free(tmp);
 			}
 			else if(!entity->info.song->comment &&
 					strcmp(re->name, "Comment") == 0) {

src/tag_editor.cpp

@@ -864,21 +864,31 @@ bool TagEditor::WriteTags(Song &s)
 			MPEG::File file(path_to_file.c_str());
 			ID3v2::Tag *tag = file.ID3v2Tag();
 			String::Type encoding = String::UTF8;
+			
 			ByteVector Composer("TCOM");
 			ByteVector Performer("TOPE");
 			ByteVector Disc("TPOS");
-			ID3v2::Frame *ComposerFrame = new ID3v2::TextIdentificationFrame(Composer, encoding);
+			
-			ID3v2::Frame *PerformerFrame = new ID3v2::TextIdentificationFrame(Performer, encoding);
+			TagLib::StringList list;
-			ID3v2::Frame *DiscFrame = new ID3v2::TextIdentificationFrame(Disc, encoding);
+			
-			ComposerFrame->setText(ToWString(s.GetComposer()));
+			GetTagList(list, s.GetComposer());
-			PerformerFrame->setText(ToWString(s.GetPerformer()));
-			DiscFrame->setText(ToWString(s.GetDisc()));
 			tag->removeFrames(Composer);
+			ID3v2::TextIdentificationFrame *ComposerFrame = new ID3v2::TextIdentificationFrame(Composer, encoding);
+			ComposerFrame->setText(list);
 			tag->addFrame(ComposerFrame);
+			
+			GetTagList(list, s.GetPerformer());
 			tag->removeFrames(Performer);
+			ID3v2::TextIdentificationFrame *PerformerFrame = new ID3v2::TextIdentificationFrame(Performer, encoding);
+			PerformerFrame->setText(list);
 			tag->addFrame(PerformerFrame);
+			
+			GetTagList(list, s.GetDisc());
 			tag->removeFrames(Disc);
+			ID3v2::TextIdentificationFrame *DiscFrame = new ID3v2::TextIdentificationFrame(Disc, encoding);
+			DiscFrame->setText(list);
 			tag->addFrame(DiscFrame);
+			
 			if (!file.save())
 				return false;
 		}
@@ -977,6 +987,18 @@ void TagEditor::LowerAllLetters(Song &s)
 	s.SetComment(conv);
 }
 
+void TagEditor::GetTagList(TagLib::StringList &list, const std::string &s)
+{
+	list.clear();
+	for (size_t i = 0; i != string::npos; i = s.find(",", i))
+	{
+		if (i)
+			i++;
+		size_t j = s.find(",", i);
+		list.append(s.substr(i, j-i));
+	}
+}
+
 std::string TagEditor::TagToString(const MPD::Song &s, void *data)
 {
 	std::string result;

src/tag_editor.h

@@ -103,6 +103,7 @@ class TagEditor : public Screen<Window>
 		static std::string CapitalizeFirstLetters(const std::string &);
 		static void CapitalizeFirstLetters(MPD::Song &);
 		static void LowerAllLetters(MPD::Song &);
+		static void GetTagList(TagLib::StringList &, const std::string &);
 		
 		static std::string TagToString(const MPD::Song &, void *);