StringConcatenateNumbers.h [plain text]
#pragma once
#include <wtf/dtoa.h>
#include <wtf/text/IntegerToStringConversion.h>
#include <wtf/text/StringConcatenate.h>
namespace WTF {
template<typename SignedInt>
class StringTypeAdapter<SignedInt, typename std::enable_if_t<std::is_integral<SignedInt>::value && std::is_signed<SignedInt>::value>> {
public:
StringTypeAdapter(SignedInt number)
: m_number(number)
{
}
unsigned length() const { return lengthOfNumberAsStringSigned(m_number); }
bool is8Bit() const { return true; }
void writeTo(LChar* destination) const { writeNumberToBufferSigned(m_number, destination); }
void writeTo(UChar* destination) const { writeNumberToBufferSigned(m_number, destination); }
String toString() const { return String::number(m_number); }
private:
SignedInt m_number;
};
template<typename UnsignedInt>
class StringTypeAdapter<UnsignedInt, typename std::enable_if_t<std::is_integral<UnsignedInt>::value && !std::is_signed<UnsignedInt>::value>> {
public:
StringTypeAdapter(UnsignedInt number)
: m_number(number)
{
}
unsigned length() const { return lengthOfNumberAsStringUnsigned(m_number); }
bool is8Bit() const { return true; }
void writeTo(LChar* destination) const { writeNumberToBufferUnsigned(m_number, destination); }
void writeTo(UChar* destination) const { writeNumberToBufferUnsigned(m_number, destination); }
String toString() const { return String::number(m_number); }
private:
UnsignedInt m_number;
};
template<typename FloatingPoint>
class StringTypeAdapter<FloatingPoint, typename std::enable_if_t<std::is_floating_point<FloatingPoint>::value>> {
public:
StringTypeAdapter(FloatingPoint number)
{
numberToString(number, m_buffer);
m_length = strlen(m_buffer);
}
unsigned length() const { return m_length; }
bool is8Bit() const { return true; }
void writeTo(LChar* destination) const
{
for (unsigned i = 0; i < m_length; ++i)
destination[i] = m_buffer[i];
}
void writeTo(UChar* destination) const
{
for (unsigned i = 0; i < m_length; ++i)
destination[i] = m_buffer[i];
}
String toString() const { return { m_buffer, m_length }; }
private:
NumberToStringBuffer m_buffer;
unsigned m_length;
};
class FormattedNumber {
public:
static FormattedNumber fixedPrecision(double number, unsigned significantFigures = 6, bool truncateTrailingZeros = false)
{
FormattedNumber numberFormatter;
numberToFixedPrecisionString(number, significantFigures, numberFormatter.m_buffer, truncateTrailingZeros);
numberFormatter.m_length = strlen(numberFormatter.m_buffer);
return numberFormatter;
}
static FormattedNumber fixedWidth(double number, unsigned decimalPlaces)
{
FormattedNumber numberFormatter;
numberToFixedWidthString(number, decimalPlaces, numberFormatter.m_buffer);
numberFormatter.m_length = strlen(numberFormatter.m_buffer);
return numberFormatter;
}
unsigned length() const { return m_length; }
const LChar* buffer() const { return reinterpret_cast<const LChar*>(m_buffer); }
private:
NumberToStringBuffer m_buffer;
unsigned m_length;
};
template<>
class StringTypeAdapter<FormattedNumber> {
public:
StringTypeAdapter(const FormattedNumber& numberFormatter)
: m_numberFormatter(numberFormatter)
{
}
unsigned length() const { return m_numberFormatter.length(); }
bool is8Bit() const { return true; }
void writeTo(LChar* destination) const
{
auto buffer = m_numberFormatter.buffer();
auto length = m_numberFormatter.length();
for (unsigned i = 0; i < length; ++i)
destination[i] = buffer[i];
}
void writeTo(UChar* destination) const
{
auto buffer = m_numberFormatter.buffer();
auto length = m_numberFormatter.length();
for (unsigned i = 0; i < length; ++i)
destination[i] = buffer[i];
}
String toString() const { return { m_numberFormatter.buffer(), m_numberFormatter.length() }; }
private:
const FormattedNumber& m_numberFormatter;
};
}
using WTF::FormattedNumber;