mirror of https://github.com/ArduPilot/ardupilot
87 lines
2.2 KiB
C
87 lines
2.2 KiB
C
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/*
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ArduPilot JSON parser
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*/
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#pragma once
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#include <cstdio>
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#include <map>
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#include <vector>
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/*
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this avoids an issue on stm32 with std::string
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*/
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#undef _GLIBCXX_USE_C99_STDIO
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#include <string>
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#define _GLIBCXX_USE_C99_STDIO 1
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class AP_JSON
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{
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public:
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struct null {};
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class value
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{
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public:
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typedef std::vector<value> array;
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typedef std::map<std::string, value> object;
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union _storage {
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bool boolean_;
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double number_;
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std::string *string_;
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array *array_;
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object *object_;
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};
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protected:
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int type_;
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_storage u_;
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public:
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value();
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value(int type, bool);
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explicit value(bool b);
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explicit value(double n);
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explicit value(const std::string &s);
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explicit value(const array &a);
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explicit value(const object &o);
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explicit value(std::string &&s);
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explicit value(array &&a);
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explicit value(object &&o);
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explicit value(const char *s);
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value(const char *s, size_t len);
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~value();
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value(const value &x);
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value &operator=(const value &x);
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value(value &&x);
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value &operator=(value &&x);
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void swap(value &x);
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template <typename T> bool is() const;
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template <typename T> const T &get() const;
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template <typename T> T &get();
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template <typename T> void set(const T &);
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template <typename T> void set(T &&);
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bool evaluate_as_boolean() const;
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const value &get(const size_t idx) const;
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const value &get(const std::string &key) const;
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value &get(const size_t idx);
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value &get(const std::string &key);
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bool contains(const size_t idx) const;
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bool contains(const std::string &key) const;
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std::string to_str() const;
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private:
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template <typename T> value(const T *); // intentionally defined to block implicit conversion of pointer to bool
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void clear();
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};
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static std::string parse(value &out, const std::string &s);
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// load a json file, returning a value object
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static value *load_json(const char *filename);
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};
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