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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file Base/Py/PyFmt.cpp
//! @brief Implements functions from namespace pyfmt.
//!
//! @homepage http://www.bornagainproject.org
//! @license GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2018
//! @authors Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
// ************************************************************************************************
#include "Base/Py/PyFmt.h"
#include "Base/Const/Units.h" // printDegrees
#include "Base/Math/Numeric.h"
#include "Base/Util/Assert.h"
#include "Base/Util/StringUtil.h"
#include <iomanip>
#include <numbers>
using std::numbers::pi;
std::string Py::Fmt::printImportedSymbols(const std::string& code)
{
std::vector<std::string> to_declare;
for (const std::string key : {"angstrom", "deg", "nm", "nm2", "nm3", "micrometer"})
if (code.find("*" + key) != std::string::npos)
to_declare.push_back(key);
for (const std::string key : {"R3"})
if (code.find(key) != std::string::npos)
to_declare.push_back(key);
return "from bornagain import " + Base::String::join(to_declare, ", ") + "\n";
}
std::string Py::Fmt::printInt(int value)
{
return std::to_string(value);
}
std::string Py::Fmt::printBool(double value)
{
return value ? "True" : "False";
}
std::string Py::Fmt::printDouble(double input)
{
std::ostringstream inter;
inter << std::setprecision(12);
if (std::abs(input) < std::numeric_limits<double>::epsilon()) {
inter << "0.0";
return inter.str();
}
inter << input;
if (inter.str().find('e') == std::string::npos && inter.str().find('.') == std::string::npos)
inter << ".0";
return inter.str();
}
//! prints double as an integer, if possible within standard accuracy
std::string Py::Fmt::printLightDouble(double input)
{
std::ostringstream inter;
int ival = std::lround(input);
if (std::abs(input - ival) < 1e-11)
inter << ival;
else {
inter << std::setprecision(12);
if (std::abs(input) < std::numeric_limits<double>::epsilon())
return "0.0";
inter << input;
if (inter.str().find('e') == std::string::npos
&& inter.str().find('.') == std::string::npos)
inter << ".0";
}
return inter.str();
}
std::string Py::Fmt::printNm(double input, int pow)
{
std::ostringstream inter;
inter << std::setprecision(12);
inter << printLightDouble(input);
if (pow > 0)
inter << "*nm";
else if (pow < 0)
inter << "/nm";
std::string str_pow = (std::abs(pow) >= 2) ? printInt(pow) : "";
inter << str_pow;
return inter.str();
}
// 1.000000e7 -> 1e7
std::string Py::Fmt::printScientificDouble(double input)
{
std::ostringstream inter;
inter << std::scientific;
inter << input;
std::string::size_type pos = inter.str().find('e');
if (pos == std::string::npos)
return inter.str();
std::string part1 = inter.str().substr(0, pos);
std::string part2 = inter.str().substr(pos, std::string::npos);
part1.erase(part1.find_last_not_of('0') + 1, std::string::npos);
if (part1.back() == '.')
part1 += "0";
return part1 + part2;
}
std::string Py::Fmt::printDegrees(double input)
{
std::ostringstream inter;
inter << printLightDouble(Units::rad2deg(input)) << "*deg";
return inter.str();
}
std::string Py::Fmt::printValue(double value, const std::string& units)
{
if (units == "rad")
return printDegrees(value);
if (units == "nm")
return printNm(value, 1);
if (units == "nm^2")
return printNm(value, 2);
if (units == "nm^3")
return printNm(value, 3);
if (units == "1/nm")
return printNm(value, -1);
if (units.empty())
return printDouble(value);
ASSERT_NEVER;
}
std::string Py::Fmt::printValue(std::variant<double, int> value, const std::string& units /*= ""*/)
{
if (std::holds_alternative<int>(value)) {
ASSERT(units.empty()); // int with units is not supported. Implement when necessary.
return printInt(std::get<int>(value));
}
return printValue(std::get<double>(value), units);
}
std::string Py::Fmt::printString(const std::string& value)
{
std::ostringstream result;
result << "\"" << value << "\"";
return result.str();
}
std::string Py::Fmt::printArguments(const std::vector<std::pair<double, std::string>>& arguments)
{
std::vector<std::string> args;
args.reserve(arguments.size());
for (const auto& argument : arguments)
args.push_back(Py::Fmt::printValue(argument.first, argument.second));
return Base::String::join(args, ", ");
}
std::string Py::Fmt::printFunction(const std::string& name,
const std::vector<std::pair<double, std::string>>& arguments)
{
return name + "(" + printArguments(arguments) + ")";
}
std::string Py::Fmt::printFunction(const std::string& name, double value, const std::string& unit)
{
return printFunction(name, {{value, unit}});
}
std::string Py::Fmt::printFunction(const std::string& name, double value1, const std::string& unit1,
double value2, const std::string& unit2)
{
return printFunction(name, {{value1, unit1}, {value2, unit2}});
}
std::string Py::Fmt::printKvector(const R3 value)
{
std::ostringstream result;
result << "R3(" << printDouble(value.x()) << ", " << printDouble(value.y()) << ", "
<< printDouble(value.z()) << ")";
return result.str();
}
std::string Py::Fmt::indent(size_t width)
{
return std::string(width, ' ');
}
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