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////////////////////////////////////////////////////////////////////////////////
/*! @file NetMath.cpp Basic expression interpreter.
- Part of RANet - Research Assistant Net Library.
- Copyright(C) 2014, Viktor E. Bursian, St.Petersburg, Russia.
Viktor.Bursian@mail.ioffe.ru
*///////////////////////////////////////////////////////////////////////////////
#include "NetMath.h"
#include "ExpressionNode.h"
#include "DataArrayFolder.h"
#include "DataListFolder.h"
#include "DataTableFolder.h"
#include "DataArrayRecord.h"
#include "DataListRecord.h"
#include "DataTableRecord.h"
namespace RA {
//------------------------------------------------------------------------------
//----------------------------------------------------------------- sNetMath ---
sNetMath::sMathOpRegistrator::sMathOpRegistrator ()
{
}
pcsFunction sNetMath::GetMathFunctionFrom (sNodePtr node)
{
pcsFunction Func = NULL;
psMathValue Value = NULL;
if( get_math_value_from<sExpressionNode>(node,Value)
|| get_math_value_from<sDataArrayFolder>(node,Value)
|| get_math_value_from<sDataListFolder>(node,Value)
|| get_math_value_from<sDataTableFolder>(node,Value)
|| get_math_value_from<sDataArrayRecord>(node,Value)
|| get_math_value_from<sDataListRecord>(node,Value)
|| get_math_value_from<sDataTableRecord>(node,Value) )
Func = dynamic_cast<pcsFunction>(Value);
return Func;
}
psMathValue sNetMath::Term ()
{
int StartCursor = Cursor;
int AttrNameStart = Cursor;
psMathValue Result = NULL;
sNodePtr ValueNode = Host;
sString Symbolic;
integer Numeric;
integer Integer;
sPhysValue PhysValue;
if( ! ValueNode.IsNULL() && ! End() && ( (Source[Cursor] == '#')
|| (Source[Cursor] == '@') ) ){
if( ! ValueNode.IsNULL() && ! End() && (Source[Cursor] == '#') ){
int Y; int M; int D; int N;
if( ! sRecord::ParseIdentifier(Source,Cursor,Y,M,D,N) ){
return new sMathError("incorrect form of a record reference"
,StartCursor,Cursor);
}else{
sPtr<sRecord> R = sRecord::FindRecord(Y,M,D,N);
if( R.IsNULL() ){
return new sMathError("cannot find such record",StartCursor,Cursor);
}else{
ValueNode = R;
}
}
}
while( ! ValueNode.IsNULL() && ! End() && (Source[Cursor] == '@') ){
Cursor++;
AttrNameStart = Cursor;
if( (Cursor < SourceLength) && (Source[Cursor] == '\'') ){
sString Tail = Source.Tail(Cursor+1);
size_t CC = Tail.Pos("'");
if( ! (CC < Tail.Length()) ){
return new sMathError("missed closing apostrophe"
,Cursor-1,Cursor+1);
}else{
Symbolic = Tail.Substr(0,CC);
if( Symbolic.Empty() ){
return new sMathError("empty symbolic attribute name"
,Cursor-1,Cursor+2);
}else{
ValueNode = ValueNode >> Symbolic;
Cursor += CC + 2;
}
}
}else if( (Cursor < SourceLength) && (Source[Cursor] == '-') ){
Cursor++;
if( IntegerNumber(Numeric) ){
ValueNode = ValueNode >> (-Numeric);
}else{
return new sMathError("incorrect numeric attribute name"
,Cursor-1,Cursor+1);
}
}else if( Identifier(Symbolic) ){
ValueNode = ValueNode >> Symbolic;
}else if( IntegerNumber(Numeric) ){
ValueNode = ValueNode >> Numeric;
}else{
return new sMathError("incorrect form of attribute name"
" (probably missed '...')"
,Cursor-1,Cursor+1);
}
}
if( ValueNode.IsNULL() ){
return new sMathError("no such attribute",AttrNameStart,Cursor);
}else if( get_from<sIntegerNode>(ValueNode,Integer) ){
Result = new sIntegerValue(Integer);
}else if( get_from<sPhysValueNode>(ValueNode,PhysValue) ){
Result = new sPhysValue(PhysValue);
}else if( get_math_value_from<sExpressionNode>(ValueNode,Result) ){
}else if( get_math_value_from<sDataArrayFolder>(ValueNode,Result) ){
}else if( get_math_value_from<sDataListFolder>(ValueNode,Result) ){
}else if( get_math_value_from<sDataTableFolder>(ValueNode,Result) ){
}else if( get_math_value_from<sDataArrayRecord>(ValueNode,Result) ){
}else if( get_math_value_from<sDataListRecord>(ValueNode,Result) ){
}else if( get_math_value_from<sDataTableRecord>(ValueNode,Result) ){
}else{
return new sMathError("unknown type of value",StartCursor,Cursor);
}
}else{
Result = sPhysMath::Term();
}
return Result;
}
//------------------------------------------------------------------------------
} //namespace RA
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