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+/*
+ * Copyright (c) 2017-2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef ARM_COMPUTE_UTILS_ENUMOPTION
+#define ARM_COMPUTE_UTILS_ENUMOPTION
+
+#include "SimpleOption.h"
+
+#include <set>
+#include <sstream>
+#include <stdexcept>
+#include <string>
+
+namespace arm_compute
+{
+namespace utils
+{
+/** Implementation of a simple option that accepts a value from a fixed set. */
+template <typename T>
+class EnumOption : public SimpleOption<T>
+{
+public:
+ /** Construct option with allowed values.
+ *
+ * @param[in] name Name of the option.
+ * @param[in] allowed_values Set of allowed values for the option.
+ */
+ EnumOption(std::string name, std::set<T> allowed_values);
+
+ /** Construct option with allowed values, a fixed number of accepted values and default values for the option.
+ *
+ * @param[in] name Name of the option.
+ * @param[in] allowed_values Set of allowed values for the option.
+ * @param[in] default_value Default value.
+ */
+ EnumOption(std::string name, std::set<T> allowed_values, T default_value);
+
+ bool parse(std::string value) override;
+ std::string help() const override;
+
+ /** Get the selected value.
+ *
+ * @return get the selected enum value.
+ */
+ const T &value() const;
+
+private:
+ std::set<T> _allowed_values{};
+};
+
+template <typename T>
+inline EnumOption<T>::EnumOption(std::string name, std::set<T> allowed_values)
+ : SimpleOption<T>{ std::move(name) }, _allowed_values{ std::move(allowed_values) }
+{
+}
+
+template <typename T>
+inline EnumOption<T>::EnumOption(std::string name, std::set<T> allowed_values, T default_value)
+ : SimpleOption<T>{ std::move(name), std::move(default_value) }, _allowed_values{ std::move(allowed_values) }
+{
+}
+
+template <typename T>
+bool EnumOption<T>::parse(std::string value)
+{
+ try
+ {
+ std::stringstream stream{ value };
+ T typed_value{};
+
+ stream >> typed_value;
+
+ if(!stream.fail())
+ {
+ if(_allowed_values.count(typed_value) == 0)
+ {
+ return false;
+ }
+
+ this->_value = std::move(typed_value);
+ this->_is_set = true;
+ return true;
+ }
+
+ return false;
+ }
+ catch(const std::invalid_argument &)
+ {
+ return false;
+ }
+}
+
+template <typename T>
+std::string EnumOption<T>::help() const
+{
+ std::stringstream msg;
+ msg << "--" + this->name() + "={";
+
+ for(const auto &value : _allowed_values)
+ {
+ msg << value << ",";
+ }
+
+ msg << "} - " << this->_help;
+
+ return msg.str();
+}
+
+template <typename T>
+inline const T &EnumOption<T>::value() const
+{
+ return this->_value;
+}
+} // namespace utils
+} // namespace arm_compute
+#endif /* ARM_COMPUTE_UTILS_ENUMOPTION */