1 files changed, 129 insertions, 0 deletions
diff --git a/src/lib/expat/ExpatParser.hxx b/src/lib/expat/ExpatParser.hxx
new file mode 100644
index 000000000..9d2ac65e5
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+++ b/src/lib/expat/ExpatParser.hxx
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_EXPAT_HXX
+#define MPD_EXPAT_HXX
+
+#include "check.h"
+#include "Compiler.h"
+
+#include <expat.h>
+
+class InputStream;
+class Error;
+
+class ExpatParser final {
+	const XML_Parser parser;
+
+public:
+	ExpatParser(void *userData)
+		:parser(XML_ParserCreate(nullptr)) {
+		XML_SetUserData(parser, userData);
+	}
+
+	~ExpatParser() {
+		XML_ParserFree(parser);
+	}
+
+	void SetElementHandler(XML_StartElementHandler start,
+			       XML_EndElementHandler end) {
+		XML_SetElementHandler(parser, start, end);
+	}
+
+	void SetCharacterDataHandler(XML_CharacterDataHandler charhndl) {
+		XML_SetCharacterDataHandler(parser, charhndl);
+	}
+
+	bool Parse(const char *data, size_t length, bool is_final,
+		   Error &error);
+
+	bool Parse(InputStream &is, Error &error);
+
+	gcc_pure
+	static const char *GetAttribute(const XML_Char **atts,
+					const char *name);
+
+	gcc_pure
+	static const char *GetAttributeCase(const XML_Char **atts,
+					    const char *name);
+
+private:
+	void SetError(Error &error);
+};
+
+/**
+ * A specialization of #ExpatParser that provides the most common
+ * callbacks as virtual methods.
+ */
+class CommonExpatParser {
+	ExpatParser parser;
+
+public:
+	CommonExpatParser():parser(this) {
+		parser.SetElementHandler(StartElement, EndElement);
+		parser.SetCharacterDataHandler(CharacterData);
+	}
+
+	bool Parse(const char *data, size_t length, bool is_final,
+		   Error &error) {
+		return parser.Parse(data, length, is_final, error);
+	}
+
+	bool Parse(InputStream &is, Error &error) {
+		return parser.Parse(is, error);
+	}
+
+	gcc_pure
+	static const char *GetAttribute(const XML_Char **atts,
+					const char *name) {
+		return ExpatParser::GetAttribute(atts, name);
+	}
+
+	gcc_pure
+	static const char *GetAttributeCase(const XML_Char **atts,
+					    const char *name) {
+		return ExpatParser::GetAttributeCase(atts, name);
+	}
+
+protected:
+	virtual void StartElement(const XML_Char *name,
+				  const XML_Char **atts) = 0;
+	virtual void EndElement(const XML_Char *name) = 0;
+	virtual void CharacterData(const XML_Char *s, int len) = 0;
+
+private:
+	static void XMLCALL StartElement(void *user_data, const XML_Char *name,
+					 const XML_Char **atts) {
+		CommonExpatParser &p = *(CommonExpatParser *)user_data;
+		p.StartElement(name, atts);
+	}
+
+	static void XMLCALL EndElement(void *user_data, const XML_Char *name) {
+		CommonExpatParser &p = *(CommonExpatParser *)user_data;
+		p.EndElement(name);
+	}
+
+	static void XMLCALL CharacterData(void *user_data,
+					  const XML_Char *s, int len) {
+		CommonExpatParser &p = *(CommonExpatParser *)user_data;
+		p.CharacterData(s, len);
+	}
+};
+
+#endif