+/*
+ * This file is part of the PulseView project.
+ *
+ * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "util.h"
+
+#include <extdef.h>
+
+#include <assert.h>
+
+#include <QTextStream>
+#include <QDebug>
+
+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;
+
+QString format_time(double t, unsigned int prefix,
+ unsigned int precision, bool sign)
+{
+ assert(prefix < countof(SIPrefixes));
+
+ const double multiplier = pow(10.0,
+ (int)- prefix * 3 - FirstSIPrefixPower);
+
+ QString s;
+ QTextStream ts(&s);
+ if (sign) {
+ ts << forcesign;
+ }
+ ts << fixed << qSetRealNumberPrecision(precision)
+ << (t * multiplier) << SIPrefixes[prefix] << "s";
+
+ return s;
+}
+
+} // namespace util
+} // namespace pv