genesis-3d_engine/Engine/foundation/io/util/bxmlloaderutil.h

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/****************************************************************************
Copyright (c) 2009, Radon Labs GmbH
Copyright (c) 2011-2013,WebJet Business Division,CYOU
http://www.genesis-3d.com.cn
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/
#pragma once
//------------------------------------------------------------------------------
/**
@class IO::BXmlLoaderUtil
Helper class for loading binary xml files created with N3's
binaryxmlconverter3 tool. BXmlLoaderUtil objects are usually
not used directly, but are wrapped by higher level classes
like XmlReader.
Uses raw char pointers so that the class can both be used
with Nebula2 and Nebula3.
*/
#include "core/types.h"
#include "io/util/bxmlfilestructs.h"
#include "util/array.h"
//------------------------------------------------------------------------------
namespace IO
{
class BXmlLoaderUtil
{
public:
static const ushort InvalidNodeIndex = 0xffff;
static const uint InvalidAttrIndex = 0xffffffff;
/// constructor
BXmlLoaderUtil();
/// destructor
~BXmlLoaderUtil();
/// setup the object from a file-in-memory, buffer must remain intact until Discard() is called!
void SetupFromFileInMemory(void* buf, SizeT size);
/// discard the object
void Discard();
/// return true if the object has been setup
bool IsValid() const;
/// find a node index by path
ushort FindNodeIndex(const char* path) const;
/// set cursor to node index
void SetCurrentNodeIndex(ushort index);
/// get current node index
ushort GetCurrentNodeIndex() const;
/// get name of current node
const char* GetCurrentNodeName() const;
/// set cursor to first matching child node, name may point to empty string
bool SetToFirstChild(const char* name);
/// set cursor to next matching child node, name may point to empty string
bool SetToNextChild(const char* name);
/// set to parent node
bool SetToParent();
/// find attribute index by name
uint FindAttrIndex(const char* attrName) const;
/// get number of attributes on node
uint GetNumAttrs() const;
/// get name of attribute by index
const char* GetAttrName(uint attrIndex) const;
/// get value of attribute by index
const char* GetAttrValue(uint attrIndex) const;
/// find a child node index by name, name may point to empty string
ushort FindChildNodeIndex(ushort nodeIndex, const char* childName) const;
/// find a sibling node index by name, name may point to empty string
ushort FindSiblingNodeIndex(ushort nodeIndex, const char* sibName) const;
/// get the parent node index of a node
ushort GetParentNodeIndex(ushort nodeIndex) const;
/// get name of a given node
const char* GetNodeName(ushort nodeIndex) const;
private:
void* buffer;
SizeT bufSize;
BXMLFileHeader* header;
BXMLFileAttr* attrs;
BXMLFileNode* nodes;
Util::Array<const char*> stringTable;
ushort curNodeIndex;
};
//------------------------------------------------------------------------------
/**
*/
inline bool
BXmlLoaderUtil::IsValid() const
{
return (0 != this->buffer);
}
//------------------------------------------------------------------------------
/**
*/
inline void
BXmlLoaderUtil::SetCurrentNodeIndex(ushort i)
{
n_assert((0 != this->header) && (i < this->header->numNodes));
this->curNodeIndex = i;
}
//------------------------------------------------------------------------------
/**
*/
inline ushort
BXmlLoaderUtil::GetCurrentNodeIndex() const
{
return this->curNodeIndex;
}
//------------------------------------------------------------------------------
/**
*/
inline const char*
BXmlLoaderUtil::GetCurrentNodeName() const
{
n_assert(InvalidNodeIndex != this->curNodeIndex);
return this->stringTable[this->nodes[this->curNodeIndex].nameIndex];
}
} // namespace IO
//------------------------------------------------------------------------------