mirror of
https://github.com/matrix-construct/construct
synced 2024-11-18 07:50:57 +01:00
137 lines
4.4 KiB
C++
137 lines
4.4 KiB
C++
// Matrix Construct
|
|
//
|
|
// Copyright (C) Matrix Construct Developers, Authors & Contributors
|
|
// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
|
|
//
|
|
// Permission to use, copy, modify, and/or distribute this software for any
|
|
// purpose with or without fee is hereby granted, provided that the above
|
|
// copyright notice and this permission notice is present in all copies. The
|
|
// full license for this software is available in the LICENSE file.
|
|
|
|
#pragma once
|
|
#define HAVE_IRCD_JSON_ARRAY_H
|
|
|
|
namespace ircd::json
|
|
{
|
|
struct array;
|
|
|
|
bool empty(const array &);
|
|
bool operator!(const array &);
|
|
size_t size(const array &);
|
|
|
|
size_t serialized(const string_view *const &begin, const string_view *const &end);
|
|
size_t serialized(const std::string *const &begin, const std::string *const &end);
|
|
size_t serialized(const array &);
|
|
|
|
string_view stringify(mutable_buffer &buf, const string_view *const &begin, const string_view *const &end);
|
|
string_view stringify(mutable_buffer &buf, const std::string *const &begin, const std::string *const &end);
|
|
string_view stringify(mutable_buffer &, const array &);
|
|
std::ostream &operator<<(std::ostream &, const array &);
|
|
}
|
|
|
|
/// Lightweight interface to a JSON array string.
|
|
///
|
|
/// This object accepts queries with numerical indexing. The same parsing
|
|
/// approach is used in ircd::json::object and that is important to note here:
|
|
/// iterating this array by incrementing your own numerical index and making
|
|
/// calls into this object is NOT efficient. Simply put, do not do something
|
|
/// like `for(int x=0; x<array.count(); x++) array.at(x)` as that will parse
|
|
/// the array from the beginning on every single increment. Instead, use the
|
|
/// provided iterator object.
|
|
///
|
|
struct ircd::json::array
|
|
:string_view
|
|
{
|
|
struct const_iterator;
|
|
|
|
using value_type = const string_view;
|
|
using pointer = value_type *;
|
|
using reference = value_type &;
|
|
using iterator = const_iterator;
|
|
using size_type = size_t;
|
|
using difference_type = ptrdiff_t;
|
|
|
|
static const uint max_recursion_depth;
|
|
|
|
const_iterator end() const;
|
|
const_iterator begin() const;
|
|
const_iterator find(size_t i) const;
|
|
|
|
bool empty() const;
|
|
size_t count() const;
|
|
size_t size() const;
|
|
|
|
template<class T> T at(const size_t &i) const;
|
|
string_view at(const size_t &i) const;
|
|
string_view operator[](const size_t &i) const;
|
|
|
|
explicit operator std::string() const;
|
|
|
|
using string_view::string_view;
|
|
|
|
template<class it> static size_t serialized(const it &b, const it &e);
|
|
template<class it> static string_view stringify(mutable_buffer &, const it &b, const it &e);
|
|
};
|
|
|
|
namespace ircd::json
|
|
{
|
|
bool operator==(const array::const_iterator &, const array::const_iterator &);
|
|
bool operator!=(const array::const_iterator &, const array::const_iterator &);
|
|
bool operator<=(const array::const_iterator &, const array::const_iterator &);
|
|
bool operator>=(const array::const_iterator &, const array::const_iterator &);
|
|
bool operator<(const array::const_iterator &, const array::const_iterator &);
|
|
bool operator>(const array::const_iterator &, const array::const_iterator &);
|
|
}
|
|
|
|
struct ircd::json::array::const_iterator
|
|
{
|
|
using value_type = const string_view;
|
|
using pointer = value_type *;
|
|
using reference = value_type &;
|
|
using iterator = const_iterator;
|
|
using size_type = size_t;
|
|
using difference_type = ptrdiff_t;
|
|
using iterator_category = std::forward_iterator_tag;
|
|
|
|
protected:
|
|
friend class array;
|
|
|
|
const char *start {nullptr};
|
|
const char *stop {nullptr};
|
|
string_view state;
|
|
|
|
const_iterator(const char *const &start, const char *const &stop)
|
|
:start{start}
|
|
,stop{stop}
|
|
{}
|
|
|
|
public:
|
|
value_type *operator->() const { return &state; }
|
|
value_type &operator*() const { return *operator->(); }
|
|
|
|
const_iterator &operator++();
|
|
|
|
const_iterator() = default;
|
|
|
|
friend bool operator==(const const_iterator &, const const_iterator &);
|
|
friend bool operator!=(const const_iterator &, const const_iterator &);
|
|
friend bool operator<=(const const_iterator &, const const_iterator &);
|
|
friend bool operator>=(const const_iterator &, const const_iterator &);
|
|
friend bool operator<(const const_iterator &, const const_iterator &);
|
|
friend bool operator>(const const_iterator &, const const_iterator &);
|
|
};
|
|
|
|
template<class T>
|
|
T
|
|
ircd::json::array::at(const size_t &i)
|
|
const try
|
|
{
|
|
return lex_cast<T>(at(i));
|
|
}
|
|
catch(const bad_lex_cast &e)
|
|
{
|
|
throw type_error
|
|
{
|
|
"indice %zu must cast to type %s", i, typeid(T).name()
|
|
};
|
|
}
|