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Nlohmann JSON for Modern C++ implementation
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‎include/cinder/Json.h‎

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/*
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Copyright (c) 2022, The Cinder Project
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All rights reserved.
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This code is designed for use with the Cinder C++ library, http://libcinder.org
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Redistribution and use in source and binary forms, with or without modification, are permitted provided that
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the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this list of conditions and
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the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
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the following disclaimer in the documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
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WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "cinder/Cinder.h"
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#include "cinder/Filesystem.h"
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#include "cinder/Rect.h"
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#include "cinder/Color.h"
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#include "cinder/Matrix.h"
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#include "cinder/DataSource.h"
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#include "glm/gtc/type_ptr.hpp"
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#include <nlohmann/json.hpp>
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namespace cinder {
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using Json = nlohmann::json;
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}
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namespace nlohmann {
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//! Serializer for tvec2
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template <typename T, glm::precision P>
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struct adl_serializer<glm::tvec2<T,P>> {
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static void to_json( json& j, const glm::tvec2<T,P> &v ) { const T* ptr = glm::value_ptr( v ); j = std::vector<T>( ptr, ptr + 2 ); }
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static void from_json( const json &j, glm::tvec2<T,P> &v ) { std::vector<T> vec = j; v = glm::make_vec2( vec.data() ); }
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};
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//! Serializer for tvec3
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template <typename T, glm::precision P>
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struct adl_serializer<glm::tvec3<T,P>> {
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static void to_json( json& j, const glm::tvec3<T,P> &v ) { const T* ptr = glm::value_ptr( v ); j = std::vector<T>( ptr, ptr + 3 ); }
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static void from_json( const json &j, glm::tvec3<T,P> &v ) { std::vector<T> vec = j; v = glm::make_vec3( vec.data() ); }
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};
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//! Serializer for tvec4
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template <typename T, glm::precision P>
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struct adl_serializer<glm::tvec4<T,P>> {
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static void to_json( json& j, const glm::tvec4<T,P> &v ) { const T* ptr = glm::value_ptr( v ); j = std::vector<T>( ptr, ptr + 4 ); }
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static void from_json( const json &j, glm::tvec4<T,P> &v ) { std::vector<T> vec = j; v = glm::make_vec4( vec.data() ); }
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};
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//! Serializer for tquat
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template <typename T, glm::precision P>
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struct adl_serializer<glm::tquat<T,P>> {
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static void to_json( json& j, const glm::tquat<T,P> &v ) { const T* ptr = glm::value_ptr( v ); j = std::vector<T>( ptr, ptr + 4 ); }
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static void from_json( const json &j, glm::tquat<T,P> &v ) { std::vector<T> vec = j; v = glm::make_quat( vec.data() ); }
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};
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//! Serializer for tmat3x3
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template <typename T, glm::precision P>
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struct adl_serializer<glm::tmat3x3<T,P>> {
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static void to_json( json& j, const glm::tmat3x3<T,P> &m ) { j = std::vector<T>( &m[0][0], &m[0][0] + 3 * 3 ); }
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static void from_json( const json &j, glm::tmat3x3<T,P> &m ) { std::vector<T> vec = j; m = glm::make_mat3x3( vec.data() ); }
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};
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//! Serializer for tmat4x4
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template <typename T, glm::precision P>
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struct adl_serializer<glm::tmat4x4<T,P>> {
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static void to_json( json& j, const glm::tmat4x4<T,P> &m ) { j = std::vector<T>( &m[0][0], &m[0][0] + 4 * 4 ); }
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static void from_json( const json &j, glm::tmat4x4<T,P> &m ) { std::vector<T> vec = j; m = glm::make_mat4x4( vec.data() ); }
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};
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//! Serializer for RectT
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template <typename T>
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struct adl_serializer<ci::RectT<T>> {
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static void to_json( json& j, const ci::RectT<T> &r ) { j = glm::tvec4<T>( r.getUpperLeft(), r.getLowerRight() ); }
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static void from_json( const json &j, ci::RectT<T> &r ) { glm::tvec4<T> v = j; r = ci::RectT<T>( v.x, v.y, v.z, v.w ); }
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};
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//! Serializer for Area
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template <>
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struct adl_serializer<ci::Area> {
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static void to_json( json& j, const ci::Area &a ) { j = glm::ivec4( a.getUL(), a.getLR() ); }
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static void from_json( const json &j, ci::Area &a ) { glm::ivec4 v = j; a = ci::Area( v.x, v.y, v.z, v.w ); }
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};
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template <typename T>
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struct adl_serializer<ci::ColorT<T>> {
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static void to_json( json& j, const ci::ColorT<T>& c ) { j = { c.r, c.g, c.b, }; }
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static void from_json( const json& j, ci::ColorT<T>& c ) { std::vector<T> vec = j; c = ci::ColorT<T>( vec[0], vec[1], vec[2] ); }
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};
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template <typename T>
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struct adl_serializer<ci::ColorAT<T>> {
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static void to_json( json& j, const ci::ColorAT<T>& c ) { j = { c.r, c.g, c.b, c.a }; }
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static void from_json( const json& j, ci::ColorAT<T>& c ) { std::vector<T> vec = j; c = ci::ColorAT<T>( vec[0], vec[1], vec[2], vec[3] ); }
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};
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}
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namespace cinder {
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Json loadJson( const cinder::fs::path &path, bool stripComments = false );
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Json loadJson( const DataSourceRef &dataSource, bool stripComments = false );
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} // namespace cinder

‎src/cinder/Json.cpp‎

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/*
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Copyright (c) 2022, The Cinder Project
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All rights reserved.
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This code is designed for use with the Cinder C++ library, http://libcinder.org
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Redistribution and use in source and binary forms, with or without modification, are permitted provided that
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the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this list of conditions and
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the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
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the following disclaimer in the documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
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WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "cinder/Json.h"
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#include "cinder/Utilities.h"
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namespace cinder {
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Json loadJson( const cinder::fs::path &path, bool stripComments )
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{
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return Json::parse( ci::loadString( loadFile( path ) ), nullptr, true, stripComments );
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}
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Json loadJson( const DataSourceRef &dataSource, bool stripComments )
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{
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return Json::parse( ci::loadString( dataSource ), nullptr, true, stripComments );
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}
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} // namespace cinder

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