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/*
* Copyright (C) 2017-2024 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <wtf/Compiler.h>
#include <wtf/dtoa.h>
#include <wtf/text/IntegerToStringConversion.h>
#include <wtf/text/StringConcatenate.h>
namespace WTF {
template<typename Integer>
class StringTypeAdapter<Integer, typename std::enable_if_t<std::is_integral_v<Integer>>> {
public:
StringTypeAdapter(Integer number)
: m_number { number }
{
}
unsigned length() const { return lengthOfIntegerAsString(m_number); }
bool is8Bit() const { return true; }
template<typename CharacterType>
void writeTo(std::span<CharacterType> destination) const { writeIntegerToBuffer(m_number, destination); }
private:
Integer m_number;
};
template<typename Enum>
class StringTypeAdapter<Enum, typename std::enable_if_t<std::is_enum_v<Enum>>> {
using UnderlyingType = typename std::underlying_type_t<Enum>;
public:
StringTypeAdapter(Enum enumValue)
: m_enum { enumValue }
{
}
unsigned length() const { return lengthOfIntegerAsString(static_cast<UnderlyingType>(m_enum)); }
bool is8Bit() const { return true; }
template<typename CharacterType>
void writeTo(std::span<CharacterType> destination) const { writeIntegerToBuffer(static_cast<UnderlyingType>(m_enum), destination); }
private:
Enum m_enum;
};
template<typename FloatingPoint>
class StringTypeAdapter<FloatingPoint, typename std::enable_if_t<std::is_floating_point<FloatingPoint>::value>> {
public:
StringTypeAdapter(FloatingPoint number)
{
m_length = numberToStringAndSize(number, m_buffer).size();
}
unsigned length() const { return m_length; }
bool is8Bit() const { return true; }
template<typename CharacterType> void writeTo(std::span<CharacterType> destination) const { StringImpl::copyCharacters(destination, span()); }
private:
std::span<const LChar> span() const LIFETIME_BOUND { return byteCast<LChar>(std::span { m_buffer }).first(m_length); }
NumberToStringBuffer m_buffer;
unsigned m_length;
};
class FormattedNumber {
WTF_MAKE_FAST_ALLOCATED;
public:
static FormattedNumber fixedPrecision(double number, unsigned significantFigures = 6, TrailingZerosPolicy trailingZerosTruncatingPolicy = TrailingZerosPolicy::Truncate)
{
FormattedNumber numberFormatter;
numberFormatter.m_length = numberToFixedPrecisionString(number, significantFigures, numberFormatter.m_buffer, trailingZerosTruncatingPolicy == TrailingZerosPolicy::Truncate).size();
return numberFormatter;
}
static FormattedNumber fixedWidth(double number, unsigned decimalPlaces)
{
FormattedNumber numberFormatter;
numberFormatter.m_length = numberToFixedWidthString(number, decimalPlaces, numberFormatter.m_buffer).size();
return numberFormatter;
}
unsigned length() const { return m_length; }
const LChar* buffer() const LIFETIME_BOUND { return byteCast<LChar>(&m_buffer[0]); }
std::span<const LChar> span() const LIFETIME_BOUND { return byteCast<LChar>(std::span { m_buffer }).first(m_length); }
private:
NumberToStringBuffer m_buffer;
unsigned m_length;
};
template<> class StringTypeAdapter<FormattedNumber> {
public:
StringTypeAdapter(const FormattedNumber& number)
: m_number { number }
{
}
unsigned length() const { return m_number.length(); }
bool is8Bit() const { return true; }
template<typename CharacterType> void writeTo(std::span<CharacterType> destination) const { StringImpl::copyCharacters(destination, m_number.span()); }
private:
const FormattedNumber& m_number;
};
class FormattedCSSNumber {
WTF_MAKE_FAST_ALLOCATED;
public:
static FormattedCSSNumber create(double number)
{
FormattedCSSNumber numberFormatter;
numberFormatter.m_length = numberToCSSString(number, numberFormatter.m_buffer).size();
return numberFormatter;
}
unsigned length() const { return m_length; }
const LChar* buffer() const LIFETIME_BOUND { return byteCast<LChar>(&m_buffer[0]); }
std::span<const LChar> span() const LIFETIME_BOUND { return byteCast<LChar>(std::span { m_buffer }).first(m_length); }
private:
NumberToCSSStringBuffer m_buffer;
unsigned m_length;
};
template<> class StringTypeAdapter<FormattedCSSNumber> {
public:
StringTypeAdapter(const FormattedCSSNumber& number)
: m_number { number }
{
}
unsigned length() const { return m_number.length(); }
bool is8Bit() const { return true; }
template<typename CharacterType> void writeTo(std::span<CharacterType> destination) const { StringImpl::copyCharacters(destination, m_number.span()); }
private:
const FormattedCSSNumber& m_number;
};
}
using WTF::FormattedNumber;
using WTF::FormattedCSSNumber;
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