IJsonConvertibleIO.h

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// The MIT License (MIT)
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// Copyright (c) 2018 www.open3d.org
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#pragma once

#include <algorithm>
#include <iterator>
#include <string>

#include "open3d/utility/IJsonConvertible.h"

namespace open3d {
namespace io {

bool ReadIJsonConvertible(const std::string &filename,
                          utility::IJsonConvertible &object);

bool WriteIJsonConvertible(const std::string &filename,
                           const utility::IJsonConvertible &object);

bool ReadIJsonConvertibleFromJSON(const std::string &filename,
                                  utility::IJsonConvertible &object);

bool WriteIJsonConvertibleToJSON(const std::string &filename,
                                 const utility::IJsonConvertible &object);

bool ReadIJsonConvertibleFromJSONString(const std::string &json_string,
                                        utility::IJsonConvertible &object);

bool WriteIJsonConvertibleToJSONString(std::string &json_string,
                                       const utility::IJsonConvertible &object);

#define DECLARE_STRINGIFY_ENUM(ENUM_TYPE)    \
    std::string enum_to_string(ENUM_TYPE e); \
    void enum_from_string(const std::string &str, ENUM_TYPE &e);

#define STRINGIFY_ENUM(ENUM_TYPE, ...)                                    \
    std::string enum_to_string(ENUM_TYPE e) {                             \
        static_assert(std::is_enum<ENUM_TYPE>::value,                     \
                      #ENUM_TYPE " must be an enum!");                    \
        static const std::pair<ENUM_TYPE, std::string> m[] = __VA_ARGS__; \
        auto it = std::find_if(                                           \
                std::begin(m), std::end(m),                               \
                [e](const std::pair<ENUM_TYPE, std::string> &es_pair)     \
                        -> bool { return es_pair.first == e; });          \
        return ((it != std::end(m)) ? it : std::begin(m))->second;        \
    }                                                                     \
    void enum_from_string(const std::string &str, ENUM_TYPE &e) {         \
        static_assert(std::is_enum<ENUM_TYPE>::value,                     \
                      #ENUM_TYPE " must be an enum!");                    \
        static const std::pair<ENUM_TYPE, std::string> m[] = __VA_ARGS__; \
        auto it = std::find_if(                                           \
                std::begin(m), std::end(m),                               \
                [&str](const std::pair<ENUM_TYPE, std::string> &es_pair)  \
                        -> bool { return es_pair.second == str; });       \
        e = ((it != std::end(m)) ? it : std::begin(m))->first;            \
        utility::LogDebug("{} -> {}", str, e);                            \
    }

}  // namespace io
}  // namespace open3d