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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkVariant.h"
#include <array>
#include <cmath>
#include <iostream>
#include <limits>
#include <string>
#include <type_traits>
namespace
{
#define Check(expr, message) \
do \
{ \
if (!(expr)) \
{ \
std::cout << __FILE__ << " L." << __LINE__ << " | " << #expr << " failed: \n" \
<< message << std::endl; \
return false; \
} \
} while (false)
template <typename T>
T ToNumeric(const vtkVariant& v, bool* valid = nullptr);
#define DefineToNumeric(type, name) \
template <> \
type ToNumeric<type>(const vtkVariant& v, bool* valid) \
{ \
return v.To##name(valid); \
}
DefineToNumeric(short, Short);
DefineToNumeric(unsigned short, UnsignedShort);
DefineToNumeric(int, Int);
DefineToNumeric(unsigned int, UnsignedInt);
DefineToNumeric(long, Long);
DefineToNumeric(unsigned long, UnsignedLong);
DefineToNumeric(long long, LongLong);
DefineToNumeric(unsigned long long, UnsignedLongLong);
DefineToNumeric(float, Float);
DefineToNumeric(double, Double);
#undef DefineToNumeric
template <typename T, typename std::enable_if<std::is_signed<T>::value>::type* = nullptr>
std::array<T, 7> IntegersValues() noexcept
{
return std::array<T, 7>{ 0, 1, 42, -1, -42, std::numeric_limits<T>::min(),
std::numeric_limits<T>::max() };
}
template <typename T, typename std::enable_if<!std::is_signed<T>::value>::type* = nullptr>
std::array<T, 4> IntegersValues() noexcept
{
return std::array<T, 4>{ 0, 1, 42, std::numeric_limits<T>::max() };
}
template <typename T>
bool CheckIntConversionHelper()
{
bool valid = false;
for (auto value : IntegersValues<T>())
{
vtkVariant variant = std::to_string(value).c_str();
Check(ToNumeric<T>(variant, &valid) == value && valid, "Conversion failed");
}
return true;
}
bool CheckIntConversion()
{
Check(CheckIntConversionHelper<short>(), "Failed to perform integer conversion");
Check(CheckIntConversionHelper<unsigned short>(), "Failed to perform integer conversion");
Check(CheckIntConversionHelper<int>(), "Failed to perform integer conversion");
Check(CheckIntConversionHelper<unsigned int>(), "Failed to perform integer conversion");
Check(CheckIntConversionHelper<long>(), "Failed to perform integer conversion");
Check(CheckIntConversionHelper<unsigned long>(), "Failed to perform integer conversion");
Check(CheckIntConversionHelper<long long>(), "Failed to perform integer conversion");
Check(CheckIntConversionHelper<unsigned long long>(), "Failed to perform integer conversion");
return true;
}
template <typename T>
bool AlmostEqual(T value, T expected, T tolerance = std::numeric_limits<T>::epsilon())
{
return expected - tolerance < value && value < expected + tolerance;
}
template <typename T>
bool CheckFloatConversionHelper()
{
bool valid = false;
Check(ToNumeric<T>("0.0", &valid) == static_cast<T>(0.0) && valid, "Conversion failed");
Check(ToNumeric<T>("-1.0", &valid) == static_cast<T>(-1.0) && valid, "Conversion failed");
Check(ToNumeric<T>("1.0", &valid) == static_cast<T>(1.0) && valid, "Conversion failed");
Check(
AlmostEqual(ToNumeric<T>("25.12", &valid), static_cast<T>(25.12), static_cast<T>(0.00001)) &&
valid,
"Conversion failed");
Check(AlmostEqual(
ToNumeric<T>("-62354.2812", &valid), static_cast<T>(-62354.2812), static_cast<T>(0.01)) &&
valid,
"Conversion failed");
return true;
}
bool CheckFloatConversion()
{
Check(CheckFloatConversionHelper<float>(), "Checks failed for float");
Check(CheckFloatConversionHelper<double>(), "Checks failed for double");
return true;
}
bool CheckCharConversion()
{
bool valid = false;
vtkVariant c = "V";
Check(c.ToChar(&valid) == 'V' && valid, "ToChar must return the first non whitespace char");
Check(c.ToSignedChar(&valid) == static_cast<signed char>('V') && valid,
"ToSignedChar must return the first non whitespace char");
Check(c.ToUnsignedChar(&valid) == static_cast<unsigned char>('V') && valid,
"ToUnsignedChar must return the first non whitespace char");
return true;
}
bool CheckNonFiniteConversion()
{
bool valid = false;
vtkVariant nan = "Nan";
Check(std::isnan(nan.ToDouble(&valid)) && valid, "Failed to convert Nan to double");
Check(std::isnan(nan.ToFloat(&valid)) && valid, "Failed to convert Nan to float");
vtkVariant inf = "InF";
Check(std::isinf(inf.ToDouble(&valid)) && valid, "Failed to parse Inf to double");
Check(inf.ToDouble(&valid) > 0 && valid, "Inf must be positive");
Check(std::isinf(inf.ToFloat(&valid)) && valid, "Failed to parse Inf to float");
Check(inf.ToFloat(&valid) > 0 && valid, "Inf must be positive");
Check(inf.ToInt(&valid) == 0 && !valid, "Inf can not be converted to int");
vtkVariant ninf = "-InF";
Check(std::isinf(ninf.ToDouble(&valid)) && valid, "Failed to parse -Inf to double");
Check(ninf.ToDouble(&valid) < 0 && valid, "-Inf must be negative");
Check(std::isinf(ninf.ToFloat(&valid)) && valid, "Failed to parse -Inf to float");
Check(ninf.ToFloat(&valid) < 0 && valid, "-Inf must be negative");
Check(ninf.ToInt(&valid) == 0 && !valid, "-Inf can not be converted to int");
vtkVariant word = "Hello";
word.ToDouble(&valid);
Check(!valid, "\"Hello\" can not be converted to double");
word.ToFloat(&valid);
Check(!valid, "\"Hello\" can not be converted to float");
word.ToInt(&valid);
Check(!valid, "\"Hello\" can not be converted to int");
return true;
}
bool CheckTrimming()
{
bool valid = false;
vtkVariant c = "\r\t\n\f\v V\r\t\n\f\v ";
Check(c.ToChar(&valid) == 'V' && valid, "Trimming not performed for chars");
vtkVariant integer = "\r\t\n\f\v 42\r\t\n\f\v ";
Check(integer.ToInt(&valid) == 42 && valid, "Trimming not performed for integers");
vtkVariant floating = "\r\t\n\f\v 42.3\r\t\n\f\v ";
const auto floating_value = floating.ToDouble(&valid);
Check(
43.01 > floating_value && floating_value > 42.29 && valid, "Trimming not performed for floats");
vtkVariant nan = "\r\t\n\f\v nan\r\t\n\f\v ";
Check(std::isnan(nan.ToFloat(&valid)) && valid, "Trimming not performed for non-finite floats");
vtkVariant cMultiple = "\r\t\n\f\v V\r\t\n\f\v tk \r\t\n\f\v";
cMultiple.ToChar(&valid);
Check(!valid, "Must fail because string contains multiple values");
vtkVariant intMultiple = "\r\t\n\f\v 42\r\t\n\f\v 12 \r\t\n\f\v";
intMultiple.ToInt(&valid);
Check(!valid, "Must fail because string contains multiple values");
intMultiple.ToFloat(&valid);
Check(!valid, "Must fail because string contains multiple values");
vtkVariant nonfiniteMultiple = "\r\t\n\f\v nan\r\t\n\f\v 12 \r\t\n\f\v";
nonfiniteMultiple.ToInt(&valid);
Check(!valid, "Must fail because string contains multiple values");
return true;
}
}
int TestVariantConversionFromString(int, char*[])
{
if (!CheckIntConversion())
{
return EXIT_FAILURE;
}
if (!CheckFloatConversion())
{
return EXIT_FAILURE;
}
if (!CheckCharConversion())
{
return EXIT_FAILURE;
}
if (!CheckNonFiniteConversion())
{
return EXIT_FAILURE;
}
if (!CheckTrimming())
{
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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