dgxmlparser: initial xml parser for DrumGizmo xml

1 files changed, 145 insertions, 0 deletions

diff --git a/src/dgxmlparser.cc b/src/dgxmlparser.cc
new file mode 100644
index 0000000..9193101
--- /dev/null
+++ b/src/dgxmlparser.cc
@@ -0,0 +1,145 @@
+/* -*- Mode: c++ -*- */
+/***************************************************************************
+ *            dgxmlparser.cc
+ *
+ *  Fri Jun  8 22:04:31 CEST 2018
+ *  Copyright 2018 Jonas Suhr Christensen
+ *  jsc@umbraculum.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  DrumGizmo is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "dgxmlparser.h"
+
+#include <unordered_map>
+#include <pugixml.hpp>
+
+#include "nolocale.h"
+
+bool probeDrumkitFile(const std::string& filename)
+{
+	DrumkitDOM d;
+	return parseDrumkitFile(filename, d);
+}
+
+bool probeInstrumentFile(const std::string& filename)
+{
+	InstrumentDOM d;
+	return parseInstrumentFile(filename, d);
+}
+
+static bool assign(double& dest, std::string val)
+{
+	dest = atof_nol(val.c_str());
+	return dest > 0;
+}
+
+static bool assign(std::string& dest, std::string val)
+{
+	dest = val;
+	return true;
+}
+
+static bool assign(size_t& dest, std::string val)
+{
+	dest = atoi(val.c_str());
+	return dest > 0;
+}
+
+template<typename T>
+static bool attrcpy(T& dest, const pugi::xml_node& src, const std::string attr)
+{
+	const char* val = src.attribute(attr.c_str()).as_string(nullptr); 
+	if(!val) return false;
+
+	return assign(dest, std::string(val));
+}
+
+bool parseDrumkitFile(const std::string& filename, DrumkitDOM& dom)
+{
+	bool res = true;
+
+	pugi::xml_document doc;
+	pugi::xml_parse_result result = doc.load_file(filename.c_str());
+	res &= !result.status;
+
+	//TODO: handle xml version 
+	
+	pugi::xml_node drumkit = doc.child("drumkit");
+	res &= attrcpy(dom.description, drumkit, "description");
+	res &= attrcpy(dom.name, drumkit, "name");
+
+	pugi::xml_node channels = doc.child("drumkit").child("channels");
+	for(pugi::xml_node channel: channels.children("channel"))
+	{
+		dom.channels.emplace_back();
+		res &= attrcpy(dom.channels.back().name, channel, "name");
+	}
+
+	pugi::xml_node instruments = doc.child("drumkit").child("instruments");
+	for(pugi::xml_node instrument: instruments.children("instrument"))
+	{
+		dom.instruments.emplace_back();
+
+		res &= attrcpy(dom.instruments.back().name, instrument, "name");
+		res &= attrcpy(dom.instruments.back().file, instrument, "file");
+		res &= attrcpy(dom.instruments.back().group, instrument, "group");
+
+		for(pugi::xml_node cmap: instrument.children("channelmap"))
+		{
+			dom.instruments.back().channel_map.emplace_back();
+			res &= attrcpy(dom.instruments.back().channel_map.back().in, cmap, "in");
+			res &= attrcpy(dom.instruments.back().channel_map.back().out, cmap, "out");
+			//TODO:handle main
+		}
+	}
+
+	return res;
+}
+
+bool parseInstrumentFile(const std::string& filename, InstrumentDOM& dom)
+{
+	bool res = true;
+
+	pugi::xml_document doc;
+	pugi::xml_parse_result result = doc.load_file(filename.c_str());
+
+	res &= !result.status;
+	//TODO: handle version
+
+	pugi::xml_node instrument = doc.child("instrument");
+	res &= attrcpy(dom.name, instrument, "name");
+
+	pugi::xml_node samples = doc.child("instrument").child("samples");
+	for(pugi::xml_node sample: samples.children("sample"))
+	{
+		dom.samples.emplace_back();
+		res &= attrcpy(dom.samples.back().name, sample, "name");
+		res &= attrcpy(dom.samples.back().power, sample, "power");
+
+		for(pugi::xml_node audiofile: sample.children("audiofile"))
+		{
+			dom.samples.back().audiofiles.emplace_back();
+			res &= attrcpy(dom.samples.back().audiofiles.back().instrument_channel, audiofile, "channel");
+			res &= attrcpy(dom.samples.back().audiofiles.back().file, audiofile, "file");
+			res &= attrcpy(dom.samples.back().audiofiles.back().filechannel, audiofile, "filechannel");
+		}
+	}
+
+	return res;
+}