X-Git-Url: http://git.code-monkey.de/?a=blobdiff_plain;f=pv%2Futil.hpp;h=f2740d409d9af018b3dc92e290e404ea8335aa0f;hb=d001f416aec37d5b13b804dec9ee9e1c011ffabb;hp=d59ad10eb804831f08c1b817bc4dd2deacdfc7ed;hpb=dae21ebcf60d6a5d7c194736b1dc792a5cbf06a5;p=pulseview.git

diff --git a/pv/util.hpp b/pv/util.hpp
index d59ad10..f2740d4 100644
--- a/pv/util.hpp
+++ b/pv/util.hpp
@@ -23,45 +23,64 @@
 
 #include <cmath>
 
+#include <boost/multiprecision/cpp_dec_float.hpp>
+
+#include <QMetaType>
 #include <QString>
 
 namespace pv {
 namespace util {
 
-enum TimeUnit {
+enum class TimeUnit {
 	Time = 1,
 	Samples = 2
 };
 
-extern const int FirstSIPrefixPower;
+enum class SIPrefix {
+	unspecified = -1,
+	yocto, zepto,
+	atto, femto, pico,
+	nano, micro, milli,
+	none,
+	kilo, mega, giga,
+	tera, peta, exa,
+	zetta, yotta
+};
+
+/// Returns the exponent that corresponds to a given prefix.
+int exponent(SIPrefix prefix);
+
+/// Timestamp type providing yoctosecond resolution.
+typedef boost::multiprecision::number<
+	boost::multiprecision::cpp_dec_float<24>,
+	boost::multiprecision::et_off> Timestamp;
 
 /**
  * Formats a given value with the specified SI prefix.
  * @param v The value to format.
  * @param unit The unit of quantity.
- * @param prefix The number of the prefix, from 0 for 'femto' up to
- *   8 for 'giga'. If prefix is set to -1, the prefix will be calculated.
+ * @param prefix The prefix to use.
  * @param precision The number of digits after the decimal separator.
  * @param sign Whether or not to add a sign also for positive numbers.
  *
  * @return The formated value.
  */
 QString format_si_value(
-	double v, QString unit, int prefix = -1,
+	const Timestamp& v, QString unit, SIPrefix prefix = SIPrefix::unspecified,
 	unsigned precision = 0, bool sign = true);
 
 /**
  * Formats a given time with the specified SI prefix.
  * @param t The time value in seconds to format.
- * @param prefix The number of the prefix, from 0 for 'femto' up to
- *   8 for 'giga'. If prefix is set to -1, the prefix will be calculated.
+ * @param prefix The prefix to use.
  * @param unit The unit of quantity.
  * @param precision The number of digits after the decimal separator or period (.).
  *
  * @return The formated value.
  */
 QString format_time(
-	double t, int prefix = -1, TimeUnit unit = Time, unsigned precision = 0);
+	const Timestamp& t, SIPrefix prefix = SIPrefix::unspecified,
+	TimeUnit unit = TimeUnit::Time, unsigned precision = 0);
 
 /**
  * Formats a given time value with a SI prefix so that the
@@ -70,9 +89,11 @@ QString format_time(
  *
  * @return The formated value.
  */
-QString format_second(double second);
+QString format_second(const Timestamp& second);
 
 } // namespace util
 } // namespace pv
 
+Q_DECLARE_METATYPE(pv::util::Timestamp)
+
 #endif // PULSEVIEW_UTIL_HPP