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/*
* Copyright (c) 2009 Samit Basu
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "AnonFunc.hpp"
#include "Algorithms.hpp"
#include "Struct.hpp"
#include "Parser.hpp"
// Merge this file with FuncPtr.cpp
#define LOOKUP(x,field) x.constStructPtr()[field].get(1)
Array AnonFuncConstructor(Interpreter* eval, const Tree & t) {
StringVector variables;
VariableReferencesList(t.second(),variables);
StringVector arguments = IdentifierList(t.first());
ArrayVector vals;
StringVector fields;
for (int i=0;i<variables.size();i++) {
ArrayReference ptr(eval->getContext()->lookupVariable(variables[i]));
if (ptr.valid()) {
fields << variables[i];
vals << *ptr;
}
// } else if (!arguments.contains(variables[i]))
// throw Exception("variable " + variables[i] + " which is not an argument, must be defined when the anonymous function is declared.");
}
Array workspace(StructConstructor(fields,vals));
Array args(CellArrayFromArray(CellArrayFromStringVector(arguments)));
Array expr(Array(QString(t.text())));
StringVector fieldnames;
fieldnames << "args" << "workspace" << "expr";
ArrayVector values;
values << args << workspace << expr;
Array ret(StructConstructor(fieldnames,values));
ret.structPtr().setClassName("anonfunction");
return ret;
}
QString AnonFuncToString(const Array &a)
{
QString ret = " @(";
StringVector argnames(StringVectorFromArray(LOOKUP(a,"args")));
if (argnames.size() > 0)
ret += argnames[0];
for (int j=1;j<argnames.size();j++)
ret += "," + argnames[j];
ret += ") " + LOOKUP(a,"expr").asString();
return ret;
}
//@@Signature
//sfunction @anonfunction:display AnonFuncDispFunction
//input x
//output none
ArrayVector AnonFuncDispFunction(int nargout, const ArrayVector& arg,
Interpreter *eval) {
for (int i=0;i<arg.size();i++) {
eval->outputMessage(AnonFuncToString(arg[i]));
eval->outputMessage("\n");
}
return ArrayVector();
}
//@@Signature
//sfunction @anonfunction:subsref AnonFuncSubsrefFunction
//input x s
//output varargout
ArrayVector AnonFuncSubsrefFunction(int nargout, const ArrayVector& arg, Interpreter* eval) {
// We should be in our own scope currently...
// Insert the variables from the workspace into the context
const Array &var(LOOKUP(arg[0],"workspace"));
const StructArray &sp(var.constStructPtr());
Context *context = eval->getContext();
// Borrow the callers scope name and detail... hope this doesn't
// have unintended side effects... err...
QString scopeName;
QString scopeDetail;
{
ParentScopeLocker lock(context);
scopeName = context->scopeName();
scopeDetail = context->scopeDetailString();
}
context->pushScope(scopeName);
context->setScopeDetailString(scopeDetail);
for (int i=0;i<sp.fieldCount();i++)
context->insertVariableLocally(sp.fieldName(i),sp[i].get(1));
// Retrieve the arguments...
ArrayVector argSet;
if (arg.size() == 2) {
if (LOOKUP(arg[1],"type").asString() != "()")
throw Exception("for anonymous functions, only a(x,...,y) is defined");
const Array &sub(LOOKUP(arg[1],"subs"));
const BasicArray<Array> &rp(sub.constReal<Array>());
for (index_t i=1;i<=rp.length();i++)
argSet.push_back(rp[i]);
}
// Assign the arguments to internal variables.
StringVector args(StringVectorFromArray(LOOKUP(arg[0],"args")));
for (int i=0;i<qMin(argSet.size(),args.size());i++)
context->insertVariableLocally(args[i],argSet[i]);
// We need to build a parse tree
const Tree & expTree(ParseExpressionString(LOOKUP(arg[0],"expr").asString()));
// Excecute the tree
ArrayVector outputs;
try {
eval->multiexpr(expTree,outputs,1,true);
} catch (InterpreterBreakException& ) {
} catch (InterpreterContinueException& ) {
} catch (InterpreterReturnException& ) {
}
context->popScope();
return outputs;
}
//@@Signature
//sfunction @anonfunction:feval AnonFuncFevalFunction
//input x varargin
//output varargout
ArrayVector AnonFuncFevalFunction(int nargout, const ArrayVector& arg, Interpreter *eval) {
if (arg.size() == 0) return ArrayVector();
const Array &var(LOOKUP(arg[0],"workspace"));
const StructArray &sp(var.constStructPtr());
Context *context = eval->getContext();
// Borrow the callers scope name and detail... hope this doesn't
// have unintended side effects... err...
QString scopeName;
QString scopeDetail;
{
ParentScopeLocker lock(context);
scopeName = context->scopeName();
scopeDetail = context->scopeDetailString();
}
context->pushScope(scopeName);
context->setScopeDetailString(scopeDetail);
for (int i=0;i<sp.fieldCount();i++)
context->insertVariableLocally(sp.fieldName(i),sp[i].get(1));
// Assign the arguments to internal variables.
StringVector argnames(StringVectorFromArray(LOOKUP(arg[0],"args")));
for (int i=0;i<qMin(arg.size()-1,argnames.size());i++)
context->insertVariableLocally(argnames[i],arg[i+1]);
// We need to build a parse tree
const Tree & expTree(ParseExpressionString(LOOKUP(arg[0],"expr").asString()));
// Excecute the tree
ArrayVector outputs;
try {
eval->multiexpr(expTree,outputs);
} catch (InterpreterBreakException& e) {
} catch (InterpreterContinueException& e) {
} catch (InterpreterReturnException& e) {
}
context->popScope();
return outputs;
}
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