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/*
* libfud
* Copyright 2024 Dominick Allen
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef LIBFUD_HPP
#define LIBFUD_HPP
#include "fud_result.hpp"
#include "fud_status.hpp"
#include "fud_string.hpp"
#include <cstdint>
namespace fud {
struct FUD {
uint8_t Major;
uint8_t Minor;
uint8_t Patch;
};
/** \brief Fear, unknown, doubt. Call at your own peril. */
constexpr FUD fud()
{
return FUD{0, 42, 0};
}
/**
* \brief Get an environmental variable if it exists.
*
* \param[in] name The name of the variable to look up.
*
* \retstmt The value of the string bound to the variable if it exists.
* \retcode FudStatus::NullPointer if name is a null pointer.
* \retcode FudStatus::NotFound if no binding for the variable exists.
*/
Result<String, FudStatus> getEnv(const char* name);
template <typename T>
concept CStringRepr = requires(T a) {
{ a.c_str() } -> std::convertible_to<const char*>;
};
template <CStringRepr T>
Result<String, FudStatus> getEnv(const T& name)
{
return getEnv(name.c_str());
}
} // namespace fud
#endif
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