mirror of
https://github.com/matrix-construct/construct
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71 lines
2.3 KiB
C++
71 lines
2.3 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2019 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#pragma once
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#define HAVE_IRCD_JSON_STRING_H
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namespace ircd::json
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{
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struct string;
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// note: in is not a json::string; all characters viewed are candidate
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string escape(const mutable_buffer &out, const string_view &in);
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// note: in is a json::string and return is a const_buffer to force
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// explicit conversions because this operation generates binary data.
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const_buffer unescape(const mutable_buffer &out, const string &in);
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}
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/// Strong type representing quoted strings in JSON (which may be unquoted
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/// automatically when this type is encountered in a tuple etc).
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struct ircd::json::string
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:string_view
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{
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// Note that the input argument is not a json::string; the caller must
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// strip surrounding quotes from the view otherwise they will be counted
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// with their missing escapes in the return value. This is by design to
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// avoid unintentionally stripping quotes from actual payloads.
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static size_t serialized(const string_view &in) noexcept;
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// Transform input into canonical string content. The output buffer must
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// be at least the size reported by serialized() on the same input.
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static size_t stringify(const mutable_buffer &out, const string_view &in) noexcept;
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string() = default;
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string(json::string &&) = default;
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string(const json::string &) = default;
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string(const string_view &s) noexcept;
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string &operator=(json::string &&) = default;
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string &operator=(const json::string &) = default;
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string &operator=(const string_view &s) noexcept;
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};
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inline
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ircd::json::string::string(const string_view &s)
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noexcept
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:string_view
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{
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surrounds(s, '"')?
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s.substr(1, s.size() - 2):
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std::string_view(s)
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}
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{}
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inline ircd::json::string &
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ircd::json::string::operator=(const string_view &s)
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noexcept
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{
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*static_cast<string_view *>(this) = surrounds(s, '"')?
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s.substr(1, s.size() - 2):
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std::string_view(s);
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return *this;
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}
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