Adjust size description strings #3403

@jancorchardt suggested to not have decimal places on file
sizes, except for GB.

src/libsync/utility.cpp

@@ -113,6 +113,10 @@ QString Utility::octetsToString( qint64 octets )
     QString s;
     qreal value = octets;
 
+    // Whether we care about decimals: only for GB and only
+    // if it's less than 10 GB.
+    bool round = true;
+
     // do not display terra byte with the current units, as when
     // the MB, GB and KB units were made, there was no TB,
     // see the JEDEC standard
@@ -120,6 +124,7 @@ QString Utility::octetsToString( qint64 octets )
     if (octets >= gb) {
         s = QCoreApplication::translate("Utility", "%L1 GB");
         value /= gb;
+        round = false;
     } else if (octets >= mb) {
         s = QCoreApplication::translate("Utility", "%L1 MB");
         value /= mb;
@@ -130,7 +135,13 @@ QString Utility::octetsToString( qint64 octets )
         s = QCoreApplication::translate("Utility", "%L1 B");
     }
 
-    return (value > 9.95)  ? s.arg(qRound(value)) : s.arg(value, 0, 'g', 2);
+    if (value > 9.95)
+        round = true;
+
+    if (round)
+        return s.arg(qRound(value));
+
+    return s.arg(value, 0, 'g', 2);
 }
 
 // Qtified version of get_platforms() in csync_owncloud.c

test/testutility.h

@@ -31,14 +31,14 @@ private slots:
         QLocale::setDefault(QLocale("en"));
         QCOMPARE(octetsToString(999) , QString("999 B"));
         QCOMPARE(octetsToString(1024) , QString("1 KB"));
-        QCOMPARE(octetsToString(1364) , QString("1.3 KB"));
+        QCOMPARE(octetsToString(1364) , QString("1 KB"));
 
-        QCOMPARE(octetsToString(9110) , QString("8.9 KB"));
-        QCOMPARE(octetsToString(9910) , QString("9.7 KB"));
+        QCOMPARE(octetsToString(9110) , QString("9 KB"));
+        QCOMPARE(octetsToString(9910) , QString("10 KB"));
         QCOMPARE(octetsToString(10240) , QString("10 KB"));
 
         QCOMPARE(octetsToString(123456) , QString("121 KB"));
-        QCOMPARE(octetsToString(1234567) , QString("1.2 MB"));
+        QCOMPARE(octetsToString(1234567) , QString("1 MB"));
         QCOMPARE(octetsToString(12345678) , QString("12 MB"));
         QCOMPARE(octetsToString(123456789) , QString("118 MB"));
         QCOMPARE(octetsToString(1000LL*1000*1000 * 5) , QString("4.7 GB"));