mirror of
https://github.com/VCMP-SqMod/SqMod.git
synced 2024-11-08 08:47:17 +01:00
3162221e7f
Also enabled the latest C++ revision in the project. Various other fixes and improvements.
493 lines
15 KiB
C++
493 lines
15 KiB
C++
#ifndef _XML_COMMON_HPP_
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#define _XML_COMMON_HPP_
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// ------------------------------------------------------------------------------------------------
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#include "ModBase.hpp"
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// ------------------------------------------------------------------------------------------------
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#include <assert.h>
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// ------------------------------------------------------------------------------------------------
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#include <pugixml.hpp>
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// ------------------------------------------------------------------------------------------------
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extern "C" {
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struct SQVM;
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typedef struct SQVM* HSQUIRRELVM;
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} /*extern "C"*/
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// ------------------------------------------------------------------------------------------------
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namespace SqMod {
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/* ------------------------------------------------------------------------------------------------
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* SOFTWARE INFORMATION
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*/
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#define SQXML_NAME "Squirrel XML Module"
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#define SQXML_AUTHOR "Sandu Liviu Catalin (S.L.C)"
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#define SQXML_COPYRIGHT "Copyright (C) 2016 Sandu Liviu Catalin"
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#define SQXML_HOST_NAME "SqModXMLHost"
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#define SQXML_VERSION 001
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#define SQXML_VERSION_STR "0.0.1"
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#define SQXML_VERSION_MAJOR 0
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#define SQXML_VERSION_MINOR 0
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#define SQXML_VERSION_PATCH 1
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// ------------------------------------------------------------------------------------------------
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using namespace pugi;
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// ------------------------------------------------------------------------------------------------
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class Node;
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class Text;
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class Document;
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class Attribute;
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class XPathNode;
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class XPathNodeSet;
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class XPathVariable;
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class XPathVariableSet;
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class XPathVariableQuery;
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/* ------------------------------------------------------------------------------------------------
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* Retrieve the temporary buffer.
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*/
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SStr GetTempBuff();
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/* ------------------------------------------------------------------------------------------------
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* Retrieve the size of the temporary buffer.
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*/
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Uint32 GetTempBuffSize();
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/* ------------------------------------------------------------------------------------------------
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* Throw a formatted exception.
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*/
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void SqThrowF(CSStr str, ...);
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/* ------------------------------------------------------------------------------------------------
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* Generate a formatted string.
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*/
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CSStr FmtStr(CSStr str, ...);
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/* ------------------------------------------------------------------------------------------------
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* Implements RAII to restore the VM stack to it's initial size on function exit.
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*/
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struct StackGuard
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{
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/* --------------------------------------------------------------------------------------------
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* Base constructor.
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*/
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StackGuard(HSQUIRRELVM vm);
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/* --------------------------------------------------------------------------------------------
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* Destructor.
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*/
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~StackGuard();
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private:
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/* --------------------------------------------------------------------------------------------
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* Copy constructor.
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*/
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StackGuard(const StackGuard &);
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/* --------------------------------------------------------------------------------------------
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* Move constructor.
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*/
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StackGuard(StackGuard &&);
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/* --------------------------------------------------------------------------------------------
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* Copy assignment operator.
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*/
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StackGuard & operator = (const StackGuard &);
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/* --------------------------------------------------------------------------------------------
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* Move assignment operator.
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*/
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StackGuard & operator = (StackGuard &&);
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private:
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// --------------------------------------------------------------------------------------------
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Int32 m_Top; /* The top of the stack when this instance was created. */
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HSQUIRRELVM m_VM; /* The VM where the stack should be restored. */
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};
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/* ------------------------------------------------------------------------------------------------
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* Manages a reference counted xml document instance.
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*/
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class DocumentRef
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{
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// --------------------------------------------------------------------------------------------
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friend class Document;
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public:
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// --------------------------------------------------------------------------------------------
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typedef xml_document Type; /* The managed type. */
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// --------------------------------------------------------------------------------------------
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typedef Type* Pointer; /* Pointer to the managed type. */
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typedef const Type* ConstPtr; /* Constant pointer to the managed type. */
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// --------------------------------------------------------------------------------------------
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typedef Type& Reference; /* Reference to the managed type. */
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typedef const Type& ConstRef; /* Constant reference to the managed type. */
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// --------------------------------------------------------------------------------------------
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typedef unsigned int Counter; /* Reference counter type. */
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private:
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// --------------------------------------------------------------------------------------------
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Pointer m_Ptr; /* The document reader, writer and manager instance. */
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Counter* m_Ref; /* Reference count to the managed instance. */
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/* --------------------------------------------------------------------------------------------
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* Grab a strong reference to a document instance.
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*/
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void Grab()
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{
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if (m_Ptr)
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++(*m_Ref);
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}
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/* --------------------------------------------------------------------------------------------
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* Drop a strong reference to a document instance.
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*/
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void Drop()
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{
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if (m_Ptr && --(*m_Ref) == 0)
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{
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delete m_Ptr;
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delete m_Ref;
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m_Ptr = NULL;
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m_Ref = NULL;
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}
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}
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/* --------------------------------------------------------------------------------------------
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* Base constructor.
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*/
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DocumentRef(VoidP /* unused */)
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: m_Ptr(new Type())
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, m_Ref(new Counter(1))
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{
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/* ... */
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}
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public:
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/* --------------------------------------------------------------------------------------------
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* Default constructor (null).
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*/
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DocumentRef()
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: m_Ptr(NULL), m_Ref(NULL)
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{
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/* ... */
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}
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/* --------------------------------------------------------------------------------------------
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* Copy constructor.
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*/
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DocumentRef(const DocumentRef & o)
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: m_Ptr(o.m_Ptr), m_Ref(o.m_Ref)
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{
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Grab();
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}
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/* --------------------------------------------------------------------------------------------
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* Move constructor.
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*/
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DocumentRef(DocumentRef && o)
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: m_Ptr(o.m_Ptr), m_Ref(o.m_Ref)
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{
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o.m_Ptr = NULL;
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o.m_Ref = NULL;
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}
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/* --------------------------------------------------------------------------------------------
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* Destructor.
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*/
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~DocumentRef()
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{
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Drop();
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}
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/* --------------------------------------------------------------------------------------------
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* Copy assignment operator.
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*/
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DocumentRef & operator = (const DocumentRef & o)
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{
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if (m_Ptr != o.m_Ptr)
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{
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Drop();
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m_Ptr = o.m_Ptr;
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m_Ref = o.m_Ref;
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Grab();
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}
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return *this;
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}
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/* --------------------------------------------------------------------------------------------
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* Move assignment operator.
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*/
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DocumentRef & operator = (DocumentRef && o)
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{
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if (m_Ptr != o.m_Ptr)
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{
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m_Ptr = o.m_Ptr;
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m_Ref = o.m_Ref;
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o.m_Ptr = NULL;
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o.m_Ref = NULL;
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}
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return *this;
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}
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/* --------------------------------------------------------------------------------------------
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* Perform an equality comparison between two document instances.
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*/
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bool operator == (const DocumentRef & o) const
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{
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return (m_Ptr == o.m_Ptr);
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}
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/* --------------------------------------------------------------------------------------------
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* Perform an inequality comparison between two document instances.
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*/
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bool operator != (const DocumentRef & o) const
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{
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return (m_Ptr != o.m_Ptr);
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}
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/* --------------------------------------------------------------------------------------------
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* Implicit conversion to boolean for use in boolean operations.
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*/
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operator bool () const
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{
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return m_Ptr;
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}
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/* --------------------------------------------------------------------------------------------
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* Implicit conversion to the managed instance pointer.
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*/
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operator Pointer ()
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{
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return m_Ptr;
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}
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/* --------------------------------------------------------------------------------------------
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* Implicit conversion to the managed instance pointer.
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*/
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operator ConstPtr () const
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{
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return m_Ptr;
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}
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/* --------------------------------------------------------------------------------------------
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* Implicit conversion to the managed instance reference.
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*/
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operator Reference ()
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{
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assert(m_Ptr);
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return *m_Ptr;
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}
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/* --------------------------------------------------------------------------------------------
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* Implicit conversion to the managed instance reference.
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*/
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operator ConstRef () const
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{
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assert(m_Ptr);
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return *m_Ptr;
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}
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/* --------------------------------------------------------------------------------------------
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* Member operator for dereferencing the managed pointer.
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*/
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Pointer operator -> () const
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{
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assert(m_Ptr);
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return m_Ptr;
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}
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/* --------------------------------------------------------------------------------------------
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* Indirection operator for obtaining a reference of the managed pointer.
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*/
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Reference operator * () const
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{
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assert(m_Ptr);
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return *m_Ptr;
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}
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/* --------------------------------------------------------------------------------------------
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* Retrieve the number of active references to the managed instance.
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*/
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Counter Count() const
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{
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return (m_Ptr && m_Ref) ? (*m_Ref) : 0;
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}
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};
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/* ------------------------------------------------------------------------------------------------
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* Allows the user to inspect the result of certain operations and act accordingly.
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*/
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class ParseResult
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{
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// --------------------------------------------------------------------------------------------
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friend class Document;
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friend class Node;
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protected:
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// --------------------------------------------------------------------------------------------
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typedef xml_parse_result Result;
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/* --------------------------------------------------------------------------------------------
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* Explicit constructor.
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*/
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ParseResult(const DocumentRef doc, const Result & result)
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: m_Doc(doc), m_Result(result)
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{
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/* ... */
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}
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/* --------------------------------------------------------------------------------------------
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* Validate the document reference and throw an error if invalid.
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*/
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void Validate() const;
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private:
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// ---------------------------------------------------------------------------------------------
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DocumentRef m_Doc; /* The main xml document instance. */
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Result m_Result; /* The managed parse result. */
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public:
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/* --------------------------------------------------------------------------------------------
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* Default constructor.
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*/
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ParseResult()
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: m_Doc(), m_Result()
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{
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/* ... */
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}
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/* --------------------------------------------------------------------------------------------
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* Copy constructor. (disabled)
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*/
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ParseResult(const ParseResult & o)
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: m_Doc(o.m_Doc), m_Result(o.m_Result)
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{
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/* ... */
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}
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/* --------------------------------------------------------------------------------------------
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* Destructor.
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*/
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~ParseResult()
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{
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/* ... */
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}
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/* --------------------------------------------------------------------------------------------
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* Copy assignment operator. (disabled)
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*/
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ParseResult & operator = (const ParseResult & o)
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{
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m_Doc = o.m_Doc;
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m_Result = o.m_Result;
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return *this;
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}
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/* --------------------------------------------------------------------------------------------
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* Used by the script engine to compare two instances of this type.
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*/
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Int32 Cmp(const ParseResult & o)
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{
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if (m_Result.status == o.m_Result.status)
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return 0;
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else if (m_Result.status > o.m_Result.status)
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return 1;
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else
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return -1;
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}
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/* --------------------------------------------------------------------------------------------
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* Used by the script engine to convert an instance of this type to a string.
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*/
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CSStr ToString() const
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{
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return m_Result.description();
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}
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/* --------------------------------------------------------------------------------------------
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* Used by the script engine to retrieve the name from instances of this type.
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*/
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static SQInteger Typename(HSQUIRRELVM vm);
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/* --------------------------------------------------------------------------------------------
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* See whether this instance references a valid xml document.
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*/
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bool IsValid() const
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{
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return m_Doc;
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}
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/* --------------------------------------------------------------------------------------------
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* Return the number of active references to this document instance.
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*/
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Uint32 GetRefCount() const
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{
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return m_Doc.Count();
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}
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/* --------------------------------------------------------------------------------------------
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* Cast to bool operator.
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*/
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bool IsOk() const
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{
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return m_Result;
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}
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/* --------------------------------------------------------------------------------------------
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* Parsing status code.
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*/
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Int32 GetStatus() const
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{
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return (Int32)m_Result.status;
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}
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/* --------------------------------------------------------------------------------------------
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* Last parsed offset. (in char_t units from start of input data)
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*/
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SQInteger GetOffset() const
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{
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return (SQInteger)m_Result.offset;
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}
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/* --------------------------------------------------------------------------------------------
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* Source document encoding.
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*/
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Int32 GetEncoding() const
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{
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return m_Result.encoding;
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}
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/* --------------------------------------------------------------------------------------------
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* Retrieve error description as a string.
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*/
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CSStr GetDescription() const
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{
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return m_Result.description();
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}
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/* --------------------------------------------------------------------------------------------
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* Check the parse result and throw the necessary errors.
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*/
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void Check() const;
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};
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} // Namespace:: SqMod
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#endif // _XML_COMMON_HPP_
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