util: Added a space between the value and prefix

[pulseview.git] / pv / util.cpp

diff --git a/pv/util.cpp b/pv/util.cpp
index 28e0dfde50d2fb9230219c5bce3b18e58a70b2bc..2e54adeaed3dffae88cb2b7354ce9eb57395302b 100644 (file)
--- 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