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#ifndef FLOAT_X_H_20151108_
#define FLOAT_X_H_20151108_
#include "API.h"
#include "Types.h"
#include <QValidator>
#include <cmath>
#include <limits>
#include <type_traits>
// Only class, nothing about sign
enum class FloatValueClass {
Zero,
Normal,
Infinity,
Denormal,
PseudoDenormal,
QNaN,
SNaN,
Unsupported
};
template <class Float>
Float EDB_EXPORT read_float(const QString &input, bool &ok);
template <class Float>
class EDB_EXPORT FloatXValidator : public QValidator {
public:
explicit FloatXValidator(QObject *parent = nullptr)
: QValidator(parent) {}
QValidator::State validate(QString &input, int &) const override;
};
template <class Float>
EDB_EXPORT QString format_float(Float value);
EDB_EXPORT FloatValueClass float_type(edb::value32 value);
EDB_EXPORT FloatValueClass float_type(edb::value64 value);
EDB_EXPORT FloatValueClass float_type(edb::value80 value);
// This will work not only for floats, but also for integers
template <class T>
constexpr int max_printed_length() {
using Limits = std::numeric_limits<T>;
constexpr bool isInteger = Limits::is_integer;
constexpr int mantissaChars = isInteger ? 1 + Limits::digits10 : Limits::max_digits10;
constexpr int signChars = std::is_signed<T>::value;
constexpr int expSignChars = !isInteger;
constexpr int decimalPointChars = !isInteger;
constexpr int expSymbol = !isInteger; // 'e' for floating-point value in scientific format
const int expMaxWidth = isInteger ? 0 : std::ceil(std::log10(Limits::max_exponent10));
const int maxWidth = signChars + mantissaChars + decimalPointChars + expSymbol + expSignChars + expMaxWidth;
return maxWidth;
}
#ifdef _MSC_VER
EDB_EXPORT void convert_real64_to_real80(const void *src, void *dst);
#endif
#endif
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