130 lines
3.3 KiB
C++
130 lines
3.3 KiB
C++
/*
|
|
* 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>
|
|
|
|
struct 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
|