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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkNew.h"
#include "vtkSelection.h"
#include "vtkSelectionNode.h"
#include "vtkSignedCharArray.h"
#include <algorithm>
#include <map>
#include <random>
#include <string>
vtkSmartPointer<vtkSignedCharArray> NewArray(vtkIdType numVals)
{
std::random_device rd; // Will be used to obtain a seed for the random number engine
std::mt19937 gen(rd()); // Standard mersenne_twister_engine seeded with rd()
std::uniform_int_distribution<> dis(0, 1);
auto array = vtkSmartPointer<vtkSignedCharArray>::New();
array->SetNumberOfComponents(1);
array->SetNumberOfTuples(numVals);
std::generate_n(array->GetPointer(0), numVals, [&]() { return dis(gen); });
return array;
}
static inline bool get(vtkSignedCharArray* array, vtkIdType cc)
{
return array->GetTypedComponent(cc, 0) != 0;
}
template <typename Functor>
void ValidateIternal(vtkSignedCharArray* result, const Functor& f)
{
for (vtkIdType cc = 0; cc < 1024; ++cc)
{
bool val = f(cc);
bool rval = get(result, cc);
if (val != rval)
{
cerr << "ERROR: failed at index '" << cc << "'." << endl;
throw std::runtime_error("value mismatch");
}
}
}
template <typename Functor>
void Validate(vtkSelection* expr, const char* exprstr,
const std::vector<vtkSignedCharArray*>& arrays, const Functor& f)
{
expr->SetExpression(exprstr);
auto result = expr->Evaluate(arrays.data(), static_cast<unsigned int>(arrays.size()));
if (!result)
{
throw std::runtime_error("null result");
}
ValidateIternal(result, f);
}
template <typename Functor, typename MapType>
void Validate(vtkSelection* expr, const char* exprstr, const MapType& arrays, const Functor& f)
{
expr->SetExpression(exprstr);
auto result = expr->Evaluate(arrays);
if (!result)
{
throw std::runtime_error("null result");
}
ValidateIternal(result, f);
}
int TestSelectionExpression(int, char*[])
{
// Test null arrays
vtkNew<vtkSelection> testEmptySelection;
testEmptySelection->SetNode("A", vtkSmartPointer<vtkSelectionNode>::New());
testEmptySelection->SetNode("B", vtkSmartPointer<vtkSelectionNode>::New());
testEmptySelection->SetNode("C", vtkSmartPointer<vtkSelectionNode>::New());
testEmptySelection->SetExpression("A|B|C");
std::vector<vtkSignedCharArray*> emptyArrays(testEmptySelection->GetNumberOfNodes(), nullptr);
testEmptySelection->Evaluate(emptyArrays.data(), static_cast<unsigned int>(emptyArrays.size()));
vtkNew<vtkSelection> expr;
vtkNew<vtkSelectionNode> aItem;
vtkNew<vtkSelectionNode> bItem;
vtkNew<vtkSelectionNode> cItem;
vtkNew<vtkSelectionNode> dItem;
vtkNew<vtkSelectionNode> eItem;
vtkNew<vtkSelectionNode> fItem;
vtkNew<vtkSelectionNode> gItem;
expr->SetNode("A", aItem);
expr->SetNode("B", bItem);
expr->SetNode("C", cItem);
expr->SetNode("D", dItem);
expr->SetNode("D", dItem);
expr->SetNode("E", eItem);
expr->SetNode("F", fItem);
expr->SetNode("G", gItem);
std::map<std::string, vtkSmartPointer<vtkSignedCharArray>> arrays;
std::vector<vtkSignedCharArray*> arrays_ptrs(expr->GetNumberOfNodes(), nullptr);
for (int cc = 0, max = expr->GetNumberOfNodes(); cc < max; ++cc)
{
const std::string varname = expr->GetNodeNameAtIndex(cc);
auto newarray = NewArray(1024);
arrays[varname] = newarray;
arrays_ptrs[cc] = newarray;
}
Validate(expr, "A & (B | (C & D))", arrays_ptrs,
[&](vtkIdType cc)
{
auto a = get(arrays["A"], cc);
auto b = get(arrays["B"], cc);
auto c = get(arrays["C"], cc);
auto d = get(arrays["D"], cc);
return a && (b || (c && d));
});
Validate(expr, "A & B | (C & D)", arrays_ptrs,
[&](vtkIdType cc)
{
auto a = get(arrays["A"], cc);
auto b = get(arrays["B"], cc);
auto c = get(arrays["C"], cc);
auto d = get(arrays["D"], cc);
return (a && b) || (c && d);
});
Validate(expr, "(A & B) | (C | (D & E) ) | (C & D)", arrays_ptrs,
[&](vtkIdType cc)
{
auto a = get(arrays["A"], cc);
auto b = get(arrays["B"], cc);
auto c = get(arrays["C"], cc);
auto d = get(arrays["D"], cc);
auto e = get(arrays["E"], cc);
return (a && b) || (c || (d && e)) || (c && d);
});
// empty expression is treated as "|"
Validate(expr, "", arrays,
[&](vtkIdType cc)
{
auto a = get(arrays["A"], cc);
auto b = get(arrays["B"], cc);
auto c = get(arrays["C"], cc);
auto d = get(arrays["D"], cc);
auto e = get(arrays["E"], cc);
auto f = get(arrays["F"], cc);
auto g = get(arrays["G"], cc);
return (a || b || c || d || e || f || g);
});
return EXIT_SUCCESS;
}
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