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Contents
#ifndef SASS_UNITS_H
#define SASS_UNITS_H
#include <cmath>
#include <string>
#include <sstream>
namespace Sass {
const double PI = std::acos(-1);
enum UnitClass {
LENGTH = 0x000,
ANGLE = 0x100,
TIME = 0x200,
FREQUENCY = 0x300,
RESOLUTION = 0x400,
INCOMMENSURABLE = 0x500
};
enum UnitType {
// size units
IN = UnitClass::LENGTH,
CM,
PC,
MM,
PT,
PX,
// angle units
DEG = ANGLE,
GRAD,
RAD,
TURN,
// time units
SEC = TIME,
MSEC,
// frequency units
HERTZ = FREQUENCY,
KHERTZ,
// resolutions units
DPI = RESOLUTION,
DPCM,
DPPX,
// for unknown units
UNKNOWN = INCOMMENSURABLE
};
extern const double size_conversion_factors[6][6];
extern const double angle_conversion_factors[4][4];
extern const double time_conversion_factors[2][2];
extern const double frequency_conversion_factors[2][2];
extern const double resolution_conversion_factors[3][3];
enum Sass::UnitType string_to_unit(const std::string&);
const char* unit_to_string(Sass::UnitType unit);
enum Sass::UnitClass get_unit_type(Sass::UnitType unit);
std::string get_unit_class(Sass::UnitType unit);
std::string unit_to_class(const std::string&);
// throws incompatibleUnits exceptions
double conversion_factor(const std::string&, const std::string&, bool = true);
class incompatibleUnits: public std::exception
{
public:
const char* msg;
incompatibleUnits(Sass::UnitType a, Sass::UnitType b)
: exception()
{
std::stringstream ss;
ss << "Incompatible units: ";
ss << "'" << unit_to_string(a) << "' and ";
ss << "'" << unit_to_string(b) << "'";
// hold on to string on stack!
std::string str(ss.str());
msg = str.c_str();
}
virtual const char* what() const throw()
{
return msg;
}
};
}
#endif
Version data entries
6 entries across 6 versions & 2 rubygems