X-Git-Url: http://git.code-monkey.de/?p=pulseview.git;a=blobdiff_plain;f=pv%2Futil.cpp;h=49b9467c1642737a1a995df5adcb622e2bbddfa1;hp=4a32147d80d1501a5401ee52744ad2911ae661ff;hb=f4ab4b5c657e5613caba82feaa81a8a400e4f331;hpb=3ccf0f7f5b1b31ac628a983a2becee6f4c4c1507

diff --git a/pv/util.cpp b/pv/util.cpp
index 4a32147..49b9467 100644
--- a/pv/util.cpp
+++ b/pv/util.cpp
@@ -14,21 +14,27 @@
  * 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
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 
 #include "util.hpp"
 
 #include <extdef.h>
 
-#include <assert.h>
-
 #include <algorithm>
+#include <cassert>
 #include <sstream>
 
-#include <QTextStream>
 #include <QDebug>
+#include <QTextStream>
+
+using std::fixed;
+using std::max;
+using std::ostringstream;
+using std::setfill;
+using std::setprecision;
+using std::showpos;
+using std::string;
 
 using namespace Qt;
 
@@ -84,24 +90,18 @@ static QTextStream& operator<<(QTextStream& stream, const Timestamp& t)
 
 	int precision = stream.realNumberPrecision();
 
-	std::ostringstream ss;
-	ss << std::fixed;
+	ostringstream ss;
+	ss << fixed;
 
-	if (stream.numberFlags() & QTextStream::ForceSign) {
-		ss << std::showpos;
-	}
+	if (stream.numberFlags() & QTextStream::ForceSign)
+		ss << showpos;
 
-	if (0 == precision) {
-		ss
-			<< std::setprecision(1)
-			<< round(t);
-	} else {
-		ss
-			<< std::setprecision(precision)
-			<< t;
-	}
+	if (0 == precision)
+		ss << setprecision(1) << round(t);
+	else
+		ss << setprecision(precision) << t;
 
-	std::string str(ss.str());
+	string str(ss.str());
 	if (0 == precision) {
 		// remove the separator and the unwanted decimal place
 		str.resize(str.size() - 2);
@@ -110,12 +110,8 @@ static QTextStream& operator<<(QTextStream& stream, const Timestamp& t)
 	return stream << QString::fromStdString(str);
 }
 
-QString format_time_si(
-	const Timestamp& v,
-	SIPrefix prefix,
-	unsigned int precision,
-	QString unit,
-	bool sign)
+QString format_time_si(const Timestamp& v, SIPrefix prefix,
+	unsigned int precision, QString unit, bool sign)
 {
 	if (prefix == SIPrefix::unspecified) {
 		// No prefix given, calculate it
@@ -142,22 +138,49 @@ QString format_time_si(
 	QTextStream ts(&s);
 	if (sign && !v.is_zero())
 		ts << forcesign;
-	ts
-		<< qSetRealNumberPrecision(precision)
-		<< (v * multiplier)
-		<< ' '
-		<< prefix
-		<< unit;
+	ts << qSetRealNumberPrecision(precision) << (v * multiplier) << ' '
+		<< prefix << unit;
+
+	return s;
+}
+
+QString format_value_si(double v, SIPrefix prefix, unsigned precision,
+	QString unit, bool sign)
+{
+	if (prefix == SIPrefix::unspecified) {
+		// No prefix given, calculate it
+
+		if (v == 0) {
+			prefix = SIPrefix::none;
+		} else {
+			int exp = exponent(SIPrefix::yotta);
+			prefix = SIPrefix::yocto;
+			while ((fabs(v) * pow(Timestamp(10), exp)) > 999 &&
+					prefix < SIPrefix::yotta) {
+				prefix = successor(prefix);
+				exp -= 3;
+			}
+		}
+	}
+
+	assert(prefix >= SIPrefix::yocto);
+	assert(prefix <= SIPrefix::yotta);
+
+	const double multiplier = pow(10.0, -exponent(prefix));
+
+	QString s;
+	QTextStream ts(&s);
+	if (sign && (v != 0))
+		ts << forcesign;
+	ts.setRealNumberNotation(QTextStream::FixedNotation);
+	ts.setRealNumberPrecision(precision);
+	ts << (v * multiplier) << ' ' << prefix << unit;
 
 	return s;
 }
 
-QString format_time_si_adjusted(
-	const Timestamp& t,
-	SIPrefix prefix,
-	unsigned precision,
-	QString unit,
-	bool sign)
+QString format_time_si_adjusted(const Timestamp& t, SIPrefix prefix,
+	unsigned precision, QString unit, bool sign)
 {
 	// The precision is always given without taking the prefix into account
 	// so we need to deduct the number of decimals the prefix might imply
@@ -165,12 +188,11 @@ QString format_time_si_adjusted(
 
 	const unsigned int relative_prec =
 		(prefix >= SIPrefix::none) ? precision :
-		std::max((int)(precision - prefix_order), 0);
+		max((int)(precision - prefix_order), 0);
 
 	return format_time_si(t, prefix, relative_prec, unit, sign);
 }
 
-
 // Helper for 'format_time_minutes()'.
 static QString pad_number(unsigned int number, int length)
 {
@@ -220,13 +242,9 @@ QString format_time_minutes(const Timestamp& t, signed precision, bool sign)
 
 		const Timestamp fraction = fabs(t) - whole_seconds;
 
-		std::ostringstream ss;
-		ss
-			<< std::fixed
-			<< std::setprecision(precision)
-			<< std::setfill('0')
-			<< fraction;
-		std::string fs = ss.str();
+		ostringstream ss;
+		ss << fixed << setprecision(precision) << setfill('0') << fraction;
+		string fs = ss.str();
 
 		// Copy all digits, inserting spaces as unit separators
 		for (int i = 1; i <= precision; i++) {
@@ -241,5 +259,27 @@ QString format_time_minutes(const Timestamp& t, signed precision, bool sign)
 	return s;
 }
 
+/**
+ * Split a string into tokens at occurences of the separator.
+ *
+ * @param[in] text The input string to split.
+ * @param[in] separator The delimiter between tokens.
+ *
+ * @return A vector of broken down tokens.
+ */
+vector<string> split_string(string text, string separator)
+{
+	vector<string> result;
+	size_t pos;
+
+	while ((pos = text.find(separator)) != std::string::npos) {
+		result.push_back(text.substr(0, pos));
+		text = text.substr(pos + separator.length());
+	}
+	result.push_back(text);
+
+	return result;
+}
+
 } // namespace util
 } // namespace pv