#include "config.h"
#include <wtf/dtoa.h>
namespace WTF {
const char* numberToString(float number, NumberToStringBuffer& buffer)
{
double_conversion::StringBuilder builder(&buffer[0], sizeof(buffer));
double_conversion::DoubleToStringConverter::EcmaScriptConverter().ToShortestSingle(number, &builder);
return builder.Finalize();
}
const char* numberToString(double d, NumberToStringBuffer& buffer)
{
double_conversion::StringBuilder builder(&buffer[0], sizeof(buffer));
auto& converter = double_conversion::DoubleToStringConverter::EcmaScriptConverter();
converter.ToShortest(d, &builder);
return builder.Finalize();
}
static inline void truncateTrailingZeros(NumberToStringBuffer& buffer, double_conversion::StringBuilder& builder)
{
size_t length = builder.position();
size_t decimalPointPosition = 0;
for (; decimalPointPosition < length; ++decimalPointPosition) {
if (buffer[decimalPointPosition] == '.')
break;
}
if (decimalPointPosition == length)
return;
size_t pastMantissa = decimalPointPosition + 1;
for (; pastMantissa < length; ++pastMantissa) {
if (buffer[pastMantissa] == 'e')
break;
}
size_t truncatedLength = pastMantissa;
for (; truncatedLength > decimalPointPosition + 1; --truncatedLength) {
if (buffer[truncatedLength - 1] != '0')
break;
}
if (truncatedLength == pastMantissa)
return;
if (truncatedLength == decimalPointPosition + 1)
truncatedLength = decimalPointPosition;
builder.RemoveCharacters(truncatedLength, pastMantissa);
}
const char* numberToFixedPrecisionString(float number, unsigned significantFigures, NumberToStringBuffer& buffer, bool shouldTruncateTrailingZeros)
{
return numberToFixedPrecisionString(static_cast<double>(number), significantFigures, buffer, shouldTruncateTrailingZeros);
}
const char* numberToFixedPrecisionString(double d, unsigned significantFigures, NumberToStringBuffer& buffer, bool shouldTruncateTrailingZeros)
{
double_conversion::StringBuilder builder(&buffer[0], sizeof(buffer));
auto& converter = double_conversion::DoubleToStringConverter::EcmaScriptConverter();
converter.ToPrecision(d, significantFigures, &builder);
if (shouldTruncateTrailingZeros)
truncateTrailingZeros(buffer, builder);
return builder.Finalize();
}
const char* numberToFixedWidthString(float number, unsigned decimalPlaces, NumberToStringBuffer& buffer)
{
return numberToFixedWidthString(static_cast<double>(number), decimalPlaces, buffer);
}
const char* numberToFixedWidthString(double d, unsigned decimalPlaces, NumberToStringBuffer& buffer)
{
double_conversion::StringBuilder builder(&buffer[0], sizeof(buffer));
auto& converter = double_conversion::DoubleToStringConverter::EcmaScriptConverter();
converter.ToFixed(d, decimalPlaces, &builder);
return builder.Finalize();
}
namespace Internal {
double parseDoubleFromLongString(const UChar* string, size_t length, size_t& parsedLength)
{
Vector<LChar> conversionBuffer(length);
for (size_t i = 0; i < length; ++i)
conversionBuffer[i] = isASCII(string[i]) ? string[i] : 0;
return parseDouble(conversionBuffer.data(), length, parsedLength);
}
}
}