stk-code_catmod/lib/angelscript/source/as_scriptnode.cpp
Sachith Hasaranga Seneviratne df67597ec7 added AS library
2014-03-16 14:44:05 +05:30

179 lines
3.7 KiB
C++

/*
AngelCode Scripting Library
Copyright (c) 2003-2012 Andreas Jonsson
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any
damages arising from the use of this software.
Permission is granted to anyone to use this software for any
purpose, including commercial applications, and to alter it and
redistribute it freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you
must not claim that you wrote the original software. If you use
this software in a product, an acknowledgment in the product
documentation would be appreciated but is not required.
2. Altered source versions must be plainly marked as such, and
must not be misrepresented as being the original software.
3. This notice may not be removed or altered from any source
distribution.
The original version of this library can be located at:
http://www.angelcode.com/angelscript/
Andreas Jonsson
andreas@angelcode.com
*/
//
// as_scriptnode.cpp
//
// A node in the script tree built by the parser for compilation
//
#include "as_scriptnode.h"
#include "as_scriptengine.h"
BEGIN_AS_NAMESPACE
asCScriptNode::asCScriptNode(eScriptNode type)
{
nodeType = type;
tokenType = ttUnrecognizedToken;
tokenPos = 0;
tokenLength = 0;
parent = 0;
next = 0;
prev = 0;
firstChild = 0;
lastChild = 0;
}
void asCScriptNode::Destroy(asCScriptEngine *engine)
{
// Destroy all children
asCScriptNode *node = firstChild;
asCScriptNode *next;
while( node )
{
next = node->next;
node->Destroy(engine);
node = next;
}
// Return the memory to the memory manager
engine->memoryMgr.FreeScriptNode(this);
}
asCScriptNode *asCScriptNode::CreateCopy(asCScriptEngine *engine)
{
void *ptr = engine->memoryMgr.AllocScriptNode();
if( ptr == 0 )
{
// Out of memory
return 0;
}
new(ptr) asCScriptNode(nodeType);
asCScriptNode *node = reinterpret_cast<asCScriptNode*>(ptr);
node->tokenLength = tokenLength;
node->tokenPos = tokenPos;
node->tokenType = tokenType;
asCScriptNode *child = firstChild;
while( child )
{
node->AddChildLast(child->CreateCopy(engine));
child = child->next;
}
return node;
}
void asCScriptNode::SetToken(sToken *token)
{
tokenType = token->type;
}
void asCScriptNode::UpdateSourcePos(size_t pos, size_t length)
{
if( pos == 0 && length == 0 ) return;
if( tokenPos == 0 && tokenLength == 0 )
{
tokenPos = pos;
tokenLength = length;
}
else
{
if( tokenPos > pos )
{
tokenLength = tokenPos + tokenLength - pos;
tokenPos = pos;
}
if( pos + length > tokenPos + tokenLength )
{
tokenLength = pos + length - tokenPos;
}
}
}
void asCScriptNode::AddChildLast(asCScriptNode *node)
{
// We might get a null pointer if the parser encounter an out-of-memory situation
if( node == 0 ) return;
if( lastChild )
{
lastChild->next = node;
node->next = 0;
node->prev = lastChild;
node->parent = this;
lastChild = node;
}
else
{
firstChild = node;
lastChild = node;
node->next = 0;
node->prev = 0;
node->parent = this;
}
UpdateSourcePos(node->tokenPos, node->tokenLength);
}
void asCScriptNode::DisconnectParent()
{
if( parent )
{
if( parent->firstChild == this )
parent->firstChild = next;
if( parent->lastChild == this )
parent->lastChild = prev;
}
if( next )
next->prev = prev;
if( prev )
prev->next = next;
parent = 0;
next = 0;
prev = 0;
}
END_AS_NAMESPACE