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//
// NumericString.h
//
// Library: Foundation
// Package: Core
// Module: NumericString
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/NumericString.h"
#if defined(POCO_UNBUNDLED)
#include <double-conversion/double-conversion.h>
#include <double-conversion/ieee.h>
#else
#include "Poco/Bugcheck.h"
// +++ double conversion +++
#define UNREACHABLE poco_bugcheck
#define UNIMPLEMENTED poco_bugcheck
#error #include "diy-fp.cc"
#error #include "cached-powers.cc"
#error #include "bignum-dtoa.cc"
#error #include "bignum.cc"
#error #include "fast-dtoa.cc"
#error #include "fixed-dtoa.cc"
#error #include "strtod.cc"
#error #include "double-conversion.cc"
// --- double conversion ---
poco_static_assert(POCO_MAX_FLT_STRING_LEN == double_conversion::kMaxSignificantDecimalDigits);
#endif
#include "Poco/String.h"
#include <memory>
#include <cctype>
namespace {
void pad(std::string& str, int precision, int width, char prefix = ' ', char decSep = '.')
/// Pads the string with prefix space and postfix 0.
/// Alternative prefix (e.g. zero instead of space) can be supplied by caller.
/// Used only internally.
{
// these cases should never happen, if they do, it's a library bug
poco_assert_dbg (precision > 0);
poco_assert_dbg (str.length());
std::string::size_type decSepPos = str.find(decSep);
if (decSepPos == std::string::npos)
{
str.append(1, '.');
decSepPos = str.size() - 1;
}
std::string::size_type frac = str.length() - decSepPos - 1;
std::string::size_type ePos = str.find_first_of("eE");
#ifndef POCO_ENABLE_CPP11
std::auto_ptr<std::string> eStr;
#else
std::unique_ptr<std::string> eStr;
#endif // POCO_ENABLE_CPP11
if (ePos != std::string::npos)
{
eStr.reset(new std::string(str.substr(ePos, std::string::npos)));
frac -= eStr->length();
str = str.substr(0, str.length() - eStr->length());
}
if (frac != precision)
{
if (frac < precision)
str.append(precision - frac, '0');
else if ((frac > precision) && (decSepPos != std::string::npos))
str = str.substr(0, decSepPos + 1 + precision);
}
if (eStr.get()) str += *eStr;
if (width && (str.length() < width)) str.insert(str.begin(), width - str.length(), prefix);
}
void insertThousandSep(std::string& str, char thSep, char decSep = '.')
/// Inserts thousand separators.
/// Used only internally.
{
poco_assert (decSep != thSep);
if (str.size() == 0) return;
std::string::size_type exPos = str.find('e');
if (exPos == std::string::npos) exPos = str.find('E');
std::string::size_type decPos = str.find(decSep);
// there's no rinsert, using forward iterator to go backwards
std::string::iterator it = str.end();
if (exPos != std::string::npos) it -= str.size() - exPos;
if (decPos != std::string::npos)
{
while (it != str.begin())
{
--it;
if (*it == decSep) break;
}
}
int thCount = 0;
if (it == str.end()) --it;
for (; it != str.begin();)
{
std::string::iterator pos = it;
std::string::value_type chr = *it;
std::string::value_type prevChr = *--it;
if (!std::isdigit(chr)) continue;
if (++thCount == 3 && std::isdigit(prevChr))
it = str.insert(pos, thSep);
if (thCount == 3) thCount = 0;
}
}
} // namespace
namespace Poco {
void floatToStr(char* buffer, int bufferSize, float value, int lowDec, int highDec)
{
using namespace double_conversion;
StringBuilder builder(buffer, bufferSize);
int flags = DoubleToStringConverter::UNIQUE_ZERO |
DoubleToStringConverter::EMIT_POSITIVE_EXPONENT_SIGN;
DoubleToStringConverter dc(flags, POCO_FLT_INF, POCO_FLT_NAN, POCO_FLT_EXP, lowDec, highDec, 0, 0);
dc.ToShortestSingle(value, &builder);
builder.Finalize();
}
void floatToFixedStr(char* buffer, int bufferSize, float value, int precision)
{
using namespace double_conversion;
StringBuilder builder(buffer, bufferSize);
int flags = DoubleToStringConverter::UNIQUE_ZERO |
DoubleToStringConverter::EMIT_POSITIVE_EXPONENT_SIGN;
DoubleToStringConverter dc(flags, POCO_FLT_INF, POCO_FLT_NAN, POCO_FLT_EXP, -std::numeric_limits<float>::digits10, std::numeric_limits<float>::digits10, 0, 0);
dc.ToFixed(value, precision, &builder);
builder.Finalize();
}
std::string& floatToStr(std::string& str, float value, int precision, int width, char thSep, char decSep)
{
if (!decSep) decSep = '.';
if (precision == 0) value = std::floor(value);
char buffer[POCO_MAX_FLT_STRING_LEN];
floatToStr(buffer, POCO_MAX_FLT_STRING_LEN, value);
str = buffer;
if (decSep && (decSep != '.') && (str.find('.') != std::string::npos))
replaceInPlace(str, '.', decSep);
if (thSep) insertThousandSep(str, thSep, decSep);
if (precision > 0 || width) pad(str, precision, width, ' ', decSep ? decSep : '.');
return str;
}
std::string& floatToFixedStr(std::string& str, float value, int precision, int width, char thSep, char decSep)
{
if (!decSep) decSep = '.';
if (precision == 0) value = std::floor(value);
char buffer[POCO_MAX_FLT_STRING_LEN];
floatToFixedStr(buffer, POCO_MAX_FLT_STRING_LEN, value, precision);
str = buffer;
if (decSep && (decSep != '.') && (str.find('.') != std::string::npos))
replaceInPlace(str, '.', decSep);
if (thSep) insertThousandSep(str, thSep, decSep);
if (precision > 0 || width) pad(str, precision, width, ' ', decSep ? decSep : '.');
return str;
}
void doubleToStr(char* buffer, int bufferSize, double value, int lowDec, int highDec)
{
using namespace double_conversion;
StringBuilder builder(buffer, bufferSize);
int flags = DoubleToStringConverter::UNIQUE_ZERO |
DoubleToStringConverter::EMIT_POSITIVE_EXPONENT_SIGN;
DoubleToStringConverter dc(flags, POCO_FLT_INF, POCO_FLT_NAN, POCO_FLT_EXP, lowDec, highDec, 0, 0);
dc.ToShortest(value, &builder);
builder.Finalize();
}
void doubleToFixedStr(char* buffer, int bufferSize, double value, int precision)
{
using namespace double_conversion;
StringBuilder builder(buffer, bufferSize);
int flags = DoubleToStringConverter::UNIQUE_ZERO |
DoubleToStringConverter::EMIT_POSITIVE_EXPONENT_SIGN;
DoubleToStringConverter dc(flags, POCO_FLT_INF, POCO_FLT_NAN, POCO_FLT_EXP, -std::numeric_limits<double>::digits10, std::numeric_limits<double>::digits10, 0, 0);
dc.ToFixed(value, precision, &builder);
builder.Finalize();
}
std::string& doubleToStr(std::string& str, double value, int precision, int width, char thSep, char decSep)
{
if (!decSep) decSep = '.';
if (precision == 0) value = std::floor(value);
char buffer[POCO_MAX_FLT_STRING_LEN];
doubleToStr(buffer, POCO_MAX_FLT_STRING_LEN, value);
str = buffer;
if (decSep && (decSep != '.') && (str.find('.') != std::string::npos))
replaceInPlace(str, '.', decSep);
if (thSep) insertThousandSep(str, thSep, decSep);
if (precision > 0 || width) pad(str, precision, width, ' ', decSep ? decSep : '.');
return str;
}
std::string& doubleToFixedStr(std::string& str, double value, int precision, int width, char thSep, char decSep)
{
if (!decSep) decSep = '.';
if (precision == 0) value = std::floor(value);
char buffer[POCO_MAX_FLT_STRING_LEN];
doubleToFixedStr(buffer, POCO_MAX_FLT_STRING_LEN, value, precision);
str = buffer;
if (decSep && (decSep != '.') && (str.find('.') != std::string::npos))
replaceInPlace(str, '.', decSep);
if (thSep) insertThousandSep(str, thSep, decSep);
if (precision > 0 || width) pad(str, precision, width, ' ', decSep ? decSep : '.');
return str;
}
float strToFloat(const char* str)
{
using namespace double_conversion;
int processed;
int flags = StringToDoubleConverter::ALLOW_LEADING_SPACES |
StringToDoubleConverter::ALLOW_TRAILING_SPACES;
StringToDoubleConverter converter(flags, 0.0, Single::NaN(), POCO_FLT_INF, POCO_FLT_NAN);
float result = converter.StringToFloat(str, static_cast<int>(strlen(str)), &processed);
return result;
}
double strToDouble(const char* str)
{
using namespace double_conversion;
int processed;
int flags = StringToDoubleConverter::ALLOW_LEADING_SPACES |
StringToDoubleConverter::ALLOW_TRAILING_SPACES;
StringToDoubleConverter converter(flags, 0.0, Double::NaN(), POCO_FLT_INF, POCO_FLT_NAN);
double result = converter.StringToDouble(str, static_cast<int>(strlen(str)), &processed);
return result;
}
bool strToFloat(const std::string& str, float& result, char decSep, char thSep)
{
using namespace double_conversion;
std::string tmp(str);
trimInPlace(tmp);
removeInPlace(tmp, thSep);
removeInPlace(tmp, 'f');
replaceInPlace(tmp, decSep, '.');
result = strToFloat(tmp.c_str());
return !FPEnvironment::isInfinite(result) &&
!FPEnvironment::isNaN(result);
}
bool strToDouble(const std::string& str, double& result, char decSep, char thSep)
{
if (str.empty()) return false;
using namespace double_conversion;
std::string tmp(str);
trimInPlace(tmp);
removeInPlace(tmp, thSep);
replaceInPlace(tmp, decSep, '.');
removeInPlace(tmp, 'f');
result = strToDouble(tmp.c_str());
return !FPEnvironment::isInfinite(result) &&
!FPEnvironment::isNaN(result);
}
} // namespace Poco
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