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construct/include/ircd/json/util.h

77 lines
2.1 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_UTIL_H
namespace ircd::json
{
using name_hash_t = size_t;
constexpr name_hash_t name_hash(const string_view name);
constexpr name_hash_t operator ""_(const char *const name, const size_t len);
/// Higher order type beyond a string to cleanly delimit multiple keys.
using path = std::initializer_list<string_view>;
std::ostream &operator<<(std::ostream &, const path &);
extern const string_view literal_null;
extern const string_view literal_true;
extern const string_view literal_false;
extern const string_view empty_string;
extern const string_view empty_object;
extern const string_view empty_array;
extern const int64_t undefined_number;
size_t serialized(const string_view &);
string_view stringify(mutable_buffer &, const string_view &);
using members = std::initializer_list<member>;
// Validate JSON - checks if valid JSON (not canonical).
bool valid(const string_view &, std::nothrow_t) noexcept;
void valid(const string_view &);
std::string why(const string_view &);
// (Internal) validates output
void valid_output(const string_view &, const size_t &expected);
}
namespace ircd
{
using json::operator<<;
}
inline std::ostream &
ircd::json::operator<<(std::ostream &s, const path &p)
{
auto it(std::begin(p));
if(it != std::end(p))
{
s << *it;
++it;
}
for(; it != std::end(p); ++it)
s << '.' << *it;
return s;
}
constexpr ircd::json::name_hash_t
ircd::json::operator ""_(const char *const text, const size_t len)
{
return name_hash(string_view(text, len));
}
constexpr ircd::json::name_hash_t
ircd::json::name_hash(const string_view name)
{
return ircd::hash(name);
}