126 lines
3.6 KiB
C++
126 lines
3.6 KiB
C++
// ArduinoJson - arduinojson.org
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// Copyright Benoit Blanchon 2014-2020
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// MIT License
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#pragma once
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#include <ArduinoJson/Namespace.hpp>
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#include <ArduinoJson/Polyfills/preprocessor.hpp>
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#include <ArduinoJson/Polyfills/static_array.hpp>
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#if ARDUINOJSON_ENABLE_STD_STREAM
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#include <ostream>
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#endif
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namespace ARDUINOJSON_NAMESPACE {
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class DeserializationError {
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// safe bool idiom
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typedef void (DeserializationError::*bool_type)() const;
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void safeBoolHelper() const {}
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public:
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enum Code {
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Ok,
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EmptyInput,
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IncompleteInput,
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InvalidInput,
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NoMemory,
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NotSupported,
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TooDeep
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};
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DeserializationError() {}
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DeserializationError(Code c) : _code(c) {}
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// Compare with DeserializationError
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friend bool operator==(const DeserializationError& lhs,
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const DeserializationError& rhs) {
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return lhs._code == rhs._code;
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}
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friend bool operator!=(const DeserializationError& lhs,
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const DeserializationError& rhs) {
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return lhs._code != rhs._code;
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}
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// Compare with Code
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friend bool operator==(const DeserializationError& lhs, Code rhs) {
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return lhs._code == rhs;
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}
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friend bool operator==(Code lhs, const DeserializationError& rhs) {
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return lhs == rhs._code;
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}
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friend bool operator!=(const DeserializationError& lhs, Code rhs) {
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return lhs._code != rhs;
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}
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friend bool operator!=(Code lhs, const DeserializationError& rhs) {
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return lhs != rhs._code;
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}
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// Behaves like a bool
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operator bool_type() const {
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return _code != Ok ? &DeserializationError::safeBoolHelper : 0;
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}
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friend bool operator==(bool value, const DeserializationError& err) {
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return static_cast<bool>(err) == value;
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}
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friend bool operator==(const DeserializationError& err, bool value) {
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return static_cast<bool>(err) == value;
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}
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friend bool operator!=(bool value, const DeserializationError& err) {
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return static_cast<bool>(err) != value;
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}
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friend bool operator!=(const DeserializationError& err, bool value) {
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return static_cast<bool>(err) != value;
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}
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// Returns internal enum, useful for switch statement
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Code code() const {
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return _code;
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}
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const char* c_str() const {
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static const char* messages[] = {
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"Ok", "EmptyInput", "IncompleteInput", "InvalidInput",
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"NoMemory", "NotSupported", "TooDeep"};
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ARDUINOJSON_ASSERT(static_cast<size_t>(_code) <
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sizeof(messages) / sizeof(messages[0]));
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return messages[_code];
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}
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#if ARDUINOJSON_ENABLE_PROGMEM
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const __FlashStringHelper* f_str() const {
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ARDUINOJSON_DEFINE_STATIC_ARRAY(char, s0, "Ok");
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ARDUINOJSON_DEFINE_STATIC_ARRAY(char, s1, "EmptyInput");
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ARDUINOJSON_DEFINE_STATIC_ARRAY(char, s2, "IncompleteInput");
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ARDUINOJSON_DEFINE_STATIC_ARRAY(char, s3, "InvalidInput");
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ARDUINOJSON_DEFINE_STATIC_ARRAY(char, s4, "NoMemory");
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ARDUINOJSON_DEFINE_STATIC_ARRAY(char, s5, "NotSupported");
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ARDUINOJSON_DEFINE_STATIC_ARRAY(char, s6, "TooDeep");
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ARDUINOJSON_DEFINE_STATIC_ARRAY(
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const char*, messages,
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ARDUINOJSON_EXPAND7({s0, s1, s2, s3, s4, s5, s6}));
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return ARDUINOJSON_READ_STATIC_ARRAY(const __FlashStringHelper*, messages,
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_code);
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}
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#endif
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private:
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Code _code;
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};
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#if ARDUINOJSON_ENABLE_STD_STREAM
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inline std::ostream& operator<<(std::ostream& s,
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const DeserializationError& e) {
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s << e.c_str();
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return s;
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}
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inline std::ostream& operator<<(std::ostream& s, DeserializationError::Code c) {
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s << DeserializationError(c).c_str();
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return s;
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}
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#endif
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} // namespace ARDUINOJSON_NAMESPACE
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