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Diffstat (limited to 'include/lib/ArduinoJson/Serialization/JsonPrintable.hpp')
-rw-r--r-- | include/lib/ArduinoJson/Serialization/JsonPrintable.hpp | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/include/lib/ArduinoJson/Serialization/JsonPrintable.hpp b/include/lib/ArduinoJson/Serialization/JsonPrintable.hpp new file mode 100644 index 0000000..e73f8fb --- /dev/null +++ b/include/lib/ArduinoJson/Serialization/JsonPrintable.hpp @@ -0,0 +1,117 @@ +// ArduinoJson - arduinojson.org +// Copyright Benoit Blanchon 2014-2018 +// MIT License + +#pragma once + +#include "../Configuration.hpp" +#include "../TypeTraits/EnableIf.hpp" +#include "DummyPrint.hpp" +#include "DynamicStringBuilder.hpp" +#include "IndentedPrint.hpp" +#include "JsonSerializer.hpp" +#include "JsonWriter.hpp" +#include "Prettyfier.hpp" +#include "StaticStringBuilder.hpp" + +#if ARDUINOJSON_ENABLE_STD_STREAM +#include "StreamPrintAdapter.hpp" +#endif + +namespace ArduinoJson { +namespace Internals { + +// Implements all the overloads of printTo() and prettyPrintTo() +// Caution: this class use a template parameter to avoid virtual methods. +// This is a bit curious but allows to reduce the size of JsonVariant, JsonArray +// and JsonObject. +template <typename T> +class JsonPrintable { + public: + template <typename Print> + typename EnableIf<!StringTraits<Print>::has_append, size_t>::type printTo( + Print &print) const { + JsonWriter<Print> writer(print); + JsonSerializer<JsonWriter<Print> >::serialize(downcast(), writer); + return writer.bytesWritten(); + } + +#if ARDUINOJSON_ENABLE_STD_STREAM + std::ostream &printTo(std::ostream &os) const { + StreamPrintAdapter adapter(os); + printTo(adapter); + return os; + } +#endif + + size_t printTo(char *buffer, size_t bufferSize) const { + StaticStringBuilder sb(buffer, bufferSize); + return printTo(sb); + } + + template <size_t TN> + size_t printTo(char (&buffer)[TN]) const { + return printTo(buffer, TN); + } + + template <typename TString> + typename EnableIf<StringTraits<TString>::has_append, size_t>::type printTo( + TString &str) const { + DynamicStringBuilder<TString> sb(str); + return printTo(sb); + } + + template <typename Print> + size_t prettyPrintTo(IndentedPrint<Print> &print) const { + Prettyfier<Print> p(print); + return printTo(p); + } + + size_t prettyPrintTo(char *buffer, size_t bufferSize) const { + StaticStringBuilder sb(buffer, bufferSize); + return prettyPrintTo(sb); + } + + template <size_t TN> + size_t prettyPrintTo(char (&buffer)[TN]) const { + return prettyPrintTo(buffer, TN); + } + + template <typename Print> + typename EnableIf<!StringTraits<Print>::has_append, size_t>::type + prettyPrintTo(Print &print) const { + IndentedPrint<Print> indentedPrint(print); + return prettyPrintTo(indentedPrint); + } + + template <typename TString> + typename EnableIf<StringTraits<TString>::has_append, size_t>::type + prettyPrintTo(TString &str) const { + DynamicStringBuilder<TString> sb(str); + return prettyPrintTo(sb); + } + + size_t measureLength() const { + DummyPrint dp; + return printTo(dp); + } + + size_t measurePrettyLength() const { + DummyPrint dp; + return prettyPrintTo(dp); + } + + private: + const T &downcast() const { + return *static_cast<const T *>(this); + } +}; + +#if ARDUINOJSON_ENABLE_STD_STREAM +template <typename T> +inline std::ostream &operator<<(std::ostream &os, const JsonPrintable<T> &v) { + return v.printTo(os); +} +#endif +} +} |