Split utilities functions into separate files

src/utilities/randutils.cpp

@@ -0,0 +1,63 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <QString>
+#include <QChar>
+
+#if QT_VERSION >= QT_VERSION_CHECK(5, 10, 0)
+#  include <QRandomGenerator>
+#endif
+
+#include "randutils.h"
+
+namespace Utilities {
+
+QString GetRandomStringWithChars(const int len) {
+  const QString UseCharacters("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz");
+  return GetRandomString(len, UseCharacters);
+}
+
+QString GetRandomStringWithCharsAndNumbers(const int len) {
+  const QString UseCharacters("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789");
+  return GetRandomString(len, UseCharacters);
+}
+
+QString CryptographicRandomString(const int len) {
+  const QString UseCharacters("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~");
+  return GetRandomString(len, UseCharacters);
+}
+
+QString GetRandomString(const int len, const QString &UseCharacters) {
+
+  QString randstr;
+  for (int i = 0; i < len; ++i) {
+#if QT_VERSION >= QT_VERSION_CHECK(5, 10, 0)
+    const qint64 index = QRandomGenerator::global()->bounded(0, UseCharacters.length());
+#else
+    const int index = qrand() % UseCharacters.length();
+#endif
+    QChar nextchar = UseCharacters.at(index);
+    randstr.append(nextchar);
+  }
+
+  return randstr;
+
+}
+
+}  // namespace Utilities