X-Git-Url: https://sigrok.org/gitweb/?p=pulseview.git;a=blobdiff_plain;f=pv%2Futil.cpp;h=2e54adeaed3dffae88cb2b7354ce9eb57395302b;hp=28e0dfde50d2fb9230219c5bce3b18e58a70b2bc;hb=208c6fc371951fe74ba5a08a0950f2837eef8b7b;hpb=f0c9f81c03d2c1d1fa59c357a88d25f6a3128651

diff --git a/pv/util.cpp b/pv/util.cpp
index 28e0dfde..2e54adea 100644
--- a/pv/util.cpp
+++ b/pv/util.cpp
@@ -18,7 +18,7 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  */
 
-#include "util.h"
+#include "util.hpp"
 
 #include <extdef.h>
 
@@ -32,13 +32,26 @@ using namespace Qt;
 namespace pv {
 namespace util {
 
-static const QString SIPrefixes[9] =
-	{"f", "p", "n", QChar(0x03BC), "m", "", "k", "M", "G"};
-const int FirstSIPrefixPower = -15;
+static const QString SIPrefixes[17] =
+	{"y", "z", "a", "f", "p", "n", QChar(0x03BC), "m", "", "k", "M", "G",
+	"T", "P", "E", "Z", "Y"};
+const int FirstSIPrefixPower = -24;
 
-QString format_time(double t, unsigned int prefix,
+QString format_si_value(double v, QString unit, int prefix,
 	unsigned int precision, bool sign)
 {
+	if (prefix < 0) {
+		int exp = -FirstSIPrefixPower;
+
+		prefix = 0;
+		while ((fabs(v) * pow(10.0, exp)) > 999.0 &&
+			prefix < (int)(countof(SIPrefixes) - 1)) {
+			prefix++;
+			exp -= 3;
+		}
+	}
+
+	assert(prefix >= 0);
 	assert(prefix < countof(SIPrefixes));
 
 	const double multiplier = pow(10.0,
@@ -46,14 +59,24 @@ QString format_time(double t, unsigned int prefix,
 
 	QString s;
 	QTextStream ts(&s);
-	if (sign) {
+	if (sign)
 		ts << forcesign;
-	}
-	ts << fixed << qSetRealNumberPrecision(precision)
-		<< (t  * multiplier) << SIPrefixes[prefix] << "s";
+	ts << fixed << qSetRealNumberPrecision(precision) <<
+		(v  * multiplier) << " " << SIPrefixes[prefix] << unit;
 
 	return s;
 }
 
+QString format_time(double t, int prefix,
+	unsigned int precision, bool sign)
+{
+	return format_si_value(t, "s", prefix, precision, sign);
+}
+
+QString format_second(double second)
+{
+	return format_si_value(second, "s", -1, 0, false);
+}
+
 } // namespace util
 } // namespace pv