Fix for building against Qt 5.6

QByteArray::append(int count, char c) was only added in Qt 5.7.

Change-Id: Iefc356e9b60e49f3c45b1987c7ff0eed6155edd4
Reviewed-by: Dominik Holland <dominik.holland@pelagicore.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/common-lib/global.cpp b/src/common-lib/global.cpp
index 653e3d9b..4b0cb491 100644
--- a/src/common-lib/global.cpp
+++ b/src/common-lib/global.cpp
@@ -222,7 +222,18 @@ static void colorLogToStderr(QtMsgType msgType, const QMessageLogContext &contex
             while (spacing < 0)
                 spacing += consoleWidth;
         }
+#if QT_VERSION < QT_VERSION_CHECK(5,7,0)
+        // efficiently appending spaces without allocating is hard in Qt 5.6
+        static const char spacingStr[] = "                                                                               ";
+        Q_STATIC_ASSERT(sizeof(spacingStr) == 80);
+        while (spacing > 0) {
+            int spacingLen = qMin(spacing, int(sizeof(spacingStr)) - 1);
+            out.append(spacingStr, spacingLen);
+            spacing -= spacingLen;
+        }
+#else
         out.append(spacing, ' ');
+#endif
         out.append('[');
 
         color(out, Magenta);