src/base/utils/string.h

   1 /*
   2  * Bittorrent Client using Qt and libtorrent.
   3  * Copyright (C) 2015  Vladimir Golovnev <glassez@yandex.ru>
   4  * Copyright (C) 2006  Christophe Dumez <chris@qbittorrent.org>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  19  *
  20  * In addition, as a special exception, the copyright holders give permission to
  21  * link this program with the OpenSSL project's "OpenSSL" library (or with
  22  * modified versions of it that use the same license as the "OpenSSL" library),
  23  * and distribute the linked executables. You must obey the GNU General Public
  24  * License in all respects for all of the code used other than "OpenSSL".  If you
  25  * modify file(s), you may extend this exception to your version of the file(s),
  26  * but you are not obligated to do so. If you do not wish to do so, delete this
  27  * exception statement from your version.
  28  */
  29
  30 #pragma once
  31
  32 #include <optional>
  33
  34 #include <QChar>
  35 #include <QMetaEnum>
  36 #include <QString>
  37 #include <Qt>
  38 #include <QtContainerFwd>
  39
  40 #include "base/global.h"
  41
  42 namespace Utils::String
  43 {
  44     QString wildcardToRegexPattern(const QString &pattern);
  45
  46     template <typename T>
  47     T unquote(const T &str, const QString &quotes = u"\""_s)
  48     {
  49         if (str.length() < 2) return str;
  50
  51         for (const QChar quote : quotes)
  52         {
  53             if (str.startsWith(quote) && str.endsWith(quote))
  54                 return str.mid(1, (str.length() - 2));
  55         }
  56
  57         return str;
  58     }
  59
  60     std::optional<bool> parseBool(const QString &string);
  61     std::optional<int> parseInt(const QString &string);
  62     std::optional<double> parseDouble(const QString &string);
  63
  64     QStringList splitCommand(const QString &command);
  65
  66     QString join(const QList<QStringView> &strings, QStringView separator);
  67
  68     QString fromDouble(double n, int precision);
  69
  70     template <typename T, typename std::enable_if_t<std::is_enum_v<T>, int> = 0>
  71     QString fromEnum(const T &value)
  72     {
  73         static_assert(std::is_same_v<int, typename std::underlying_type_t<T>>,
  74                       "Enumeration underlying type has to be int.");
  75
  76         const auto metaEnum = QMetaEnum::fromType<T>();
  77         return QString::fromLatin1(metaEnum.valueToKey(static_cast<int>(value)));
  78     }
  79
  80     template <typename T, typename std::enable_if_t<std::is_enum_v<T>, int> = 0>
  81     T toEnum(const QString &serializedValue, const T &defaultValue)
  82     {
  83         static_assert(std::is_same_v<int, typename std::underlying_type_t<T>>,
  84                       "Enumeration underlying type has to be int.");
  85
  86         const auto metaEnum = QMetaEnum::fromType<T>();
  87         bool ok = false;
  88         const T value = static_cast<T>(metaEnum.keyToValue(serializedValue.toLatin1().constData(), &ok));
  89         return (ok ? value : defaultValue);
  90     }
  91 }