mirror of
https://github.com/matrix-construct/construct
synced 2024-11-09 11:31:11 +01:00
1715 lines
36 KiB
C++
1715 lines
36 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) 2016-2018 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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#include <ircd/spirit.h>
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#include <boost/fusion/include/at.hpp>
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namespace ircd::json
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{
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namespace spirit = boost::spirit;
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namespace ascii = spirit::ascii;
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namespace karma = spirit::karma;
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namespace qi = spirit::qi;
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using spirit::unused_type;
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using qi::lit;
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using qi::char_;
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using qi::long_;
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using qi::double_;
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using qi::raw;
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using qi::omit;
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using qi::matches;
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using qi::hold;
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using qi::eoi;
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using qi::eps;
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using qi::attr;
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using qi::repeat;
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using qi::_r1_type;
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using karma::lit;
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using karma::char_;
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using karma::long_;
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using karma::double_;
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using karma::bool_;
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using karma::maxwidth;
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using karma::eps;
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using karma::attr_cast;
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struct expectation_failure;
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template<class it> struct input;
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template<class it> struct output;
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// Instantiations of the grammars
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struct parser extern const parser;
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struct printer extern const printer;
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struct ostreamer extern const ostreamer;
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}
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BOOST_FUSION_ADAPT_STRUCT
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(
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ircd::json::member,
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( decltype(ircd::json::member::first), first )
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( decltype(ircd::json::member::second), second )
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)
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BOOST_FUSION_ADAPT_STRUCT
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(
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ircd::json::object::member,
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( decltype(ircd::json::object::member::first), first )
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( decltype(ircd::json::object::member::second), second )
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)
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template<class it>
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struct ircd::json::input
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:qi::grammar<it, unused_type>
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{
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template<class T = unused_type> using rule = qi::rule<it, T>;
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rule<> NUL { lit('\0') ,"nul" };
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// insignificant whitespaces
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rule<> SP { lit('\x20') ,"space" };
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rule<> HT { lit('\x09') ,"horizontal tab" };
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rule<> CR { lit('\x0D') ,"carriage return" };
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rule<> LF { lit('\x0A') ,"line feed" };
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// whitespace skipping
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rule<> WS { SP | HT | CR | LF ,"whitespace" };
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rule<> ws { *(WS) ,"whitespace monoid" };
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rule<> wsp { +(WS) ,"whitespace semigroup" };
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// structural
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rule<> object_begin { lit('{') ,"object begin" };
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rule<> object_end { lit('}') ,"object end" };
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rule<> array_begin { lit('[') ,"array begin" };
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rule<> array_end { lit(']') ,"array end" };
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rule<> name_sep { lit(':') ,"name sep" };
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rule<> value_sep { lit(',') ,"value sep" };
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rule<> escape { lit('\\') ,"escape" };
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rule<> quote { lit('"') ,"quote" };
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// literal
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rule<> lit_false { lit("false") ,"literal false" };
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rule<> lit_true { lit("true") ,"literal true" };
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rule<> lit_null { lit("null") ,"null" };
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rule<> boolean { lit_true | lit_false ,"boolean" };
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rule<> literal { lit_true | lit_false | lit_null ,"literal" };
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// numerical (TODO: exponent)
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rule<> number { double_ ,"number" };
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// string
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rule<> unicode
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{
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lit('u') >> qi::uint_parser<char, 16, 4, 4>{}
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,"escaped unicode"
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};
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rule<> escaped
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{
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lit('"') | lit('\\') | lit('\b') | lit('\f') | lit('\n') | lit('\r') | lit('\t')
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,"escaped"
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};
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rule<> escaper
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{
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lit('"') | lit('\\') | lit('b') | lit('f') | lit('n') | lit('r') | lit('t') | unicode
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,"escaped"
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};
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rule<> escaper_nc
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{
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escaper | lit('/')
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};
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rule<string_view> chars
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{
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raw[*((char_ - (escape | quote)) | (escape >> escaper_nc))]
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,"characters"
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};
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rule<string_view> string
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{
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quote >> chars >> (!escape >> quote)
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,"string"
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};
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// container
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rule<string_view> name
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{
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string
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,"name"
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};
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// recursion depth
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_r1_type depth;
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[[noreturn]] static void throws_exceeded();
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const rule<unused_type(uint)> member
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{
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name >> name_sep >> value(depth)
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,"member"
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};
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const rule<unused_type(uint)> object
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{
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(eps(depth < json::object::max_recursion_depth) | eps[throws_exceeded]) >>
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object_begin >> -(member(depth) % value_sep) >> object_end
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,"object"
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};
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const rule<unused_type(uint)> array
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{
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(eps(depth < json::array::max_recursion_depth) | eps[throws_exceeded]) >>
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array_begin >> -(value(depth) % value_sep) >> array_end
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,"array"
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};
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const rule<unused_type(uint)> value
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{
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lit_false | lit_null | lit_true | object(depth + 1) | array(depth + 1) | number | string
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,"value"
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};
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rule<int> type
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{
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(omit[object_begin] >> attr(json::OBJECT)) |
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(omit[array_begin] >> attr(json::ARRAY)) |
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(omit[quote] >> attr(json::STRING)) |
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(omit[number >> eoi] >> attr(json::NUMBER)) |
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(omit[literal >> eoi] >> attr(json::LITERAL))
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,"type"
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};
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input()
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:input::base_type{rule<>{}}
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{}
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};
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template<class it>
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struct ircd::json::output
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:karma::grammar<it, unused_type>
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{
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template<class T = unused_type> using rule = karma::rule<it, T>;
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rule<> NUL { lit('\0') ,"nul" };
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// insignificant whitespaces
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rule<> SP { lit('\x20') ,"space" };
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rule<> HT { lit('\x09') ,"horizontal tab" };
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rule<> CR { lit('\x0D') ,"carriage return" };
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rule<> LF { lit('\x0A') ,"line feed" };
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// whitespace skipping
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rule<> WS { SP | HT | CR | LF ,"whitespace" };
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rule<> ws { *(WS) ,"whitespace monoid" };
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rule<> wsp { +(WS) ,"whitespace semigroup" };
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// structural
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rule<> object_begin { lit('{') ,"object begin" };
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rule<> object_end { lit('}') ,"object end" };
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rule<> array_begin { lit('[') ,"array begin" };
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rule<> array_end { lit(']') ,"array end" };
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rule<> name_sep { lit(':') ,"name separator" };
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rule<> value_sep { lit(',') ,"value separator" };
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rule<> quote { lit('"') ,"quote" };
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rule<> escape { lit('\\') ,"escape" };
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rule<string_view> lit_true { karma::string("true") ,"literal true" };
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rule<string_view> lit_false { karma::string("false") ,"literal false" };
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rule<string_view> lit_null { karma::string("null") ,"literal null" };
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rule<string_view> boolean { lit_true | lit_false ,"boolean" };
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rule<string_view> literal { lit_true | lit_false | lit_null ,"literal" };
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rule<string_view> number { double_ ,"number" };
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rule<string_view> chars
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{
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*(karma::print) //TODO: exacting
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,"characters"
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};
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rule<string_view> string
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{
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quote << chars << quote
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,"string"
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};
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rule<string_view> name
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{
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string
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,"name"
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};
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output()
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:output::base_type{rule<>{}}
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{}
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};
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struct ircd::json::expectation_failure
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:parse_error
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{
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expectation_failure(const char *const &start,
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const qi::expectation_failure<const char *> &e,
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const ssize_t &show_max = 64)
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:parse_error
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{
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"Expected %s. You input %zd invalid characters at position %zd: %s",
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ircd::string(e.what_),
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std::distance(e.first, e.last),
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std::distance(start, e.first),
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string_view{e.first, e.first + std::min(std::distance(e.first, e.last), show_max)}
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}{}
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};
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struct ircd::json::parser
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:input<const char *>
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{
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using input::input;
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}
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const ircd::json::parser;
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struct ircd::json::printer
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:output<char *>
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{
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template<class generator,
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class attribute>
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bool operator()(char *&out, char *const &stop, generator&& gen, attribute&& a) const;
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template<class generator>
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bool operator()(char *&out, char *const &stop, generator&& gen) const;
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template<class... args>
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bool operator()(mutable_buffer &out, args&&... a) const
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{
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return operator()(begin(out), end(out), std::forward<args>(a)...);
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}
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template<class it_a,
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class it_b,
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class closure>
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static void list_protocol(mutable_buffer &, it_a begin, const it_b &end, closure&&);
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}
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const ircd::json::printer;
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struct ircd::json::ostreamer
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:output<karma::ostream_iterator<char>>
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{
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}
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const ircd::json::ostreamer;
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template<class gen,
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class attr>
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bool
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ircd::json::printer::operator()(char *&out,
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char *const &stop,
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gen&& g,
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attr&& a)
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const
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{
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const auto throws{[&out, &stop]
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{
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throw print_error
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{
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"Failed to print attribute '%s' generator '%s' (%zd bytes in buffer)",
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demangle<decltype(a)>(),
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demangle<decltype(g)>(),
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size_t(stop - out)
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};
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}};
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const auto gg
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{
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maxwidth(size_t(stop - out))[std::forward<gen>(g)] | eps[throws]
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};
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return karma::generate(out, gg, std::forward<attr>(a));
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}
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template<class gen>
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bool
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ircd::json::printer::operator()(char *&out,
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char *const &stop,
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gen&& g)
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const
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{
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const auto throws{[&out, &stop]
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{
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throw print_error
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{
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"Failed to print generator '%s' (%zd bytes in buffer)",
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demangle<decltype(g)>(),
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size_t(stop - out)
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};
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}};
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const auto gg
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{
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maxwidth(size_t(stop - out))[std::forward<gen>(g)] | eps[throws]
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};
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return karma::generate(out, gg);
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}
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template<class it_a,
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class it_b,
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class closure>
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void
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ircd::json::printer::list_protocol(mutable_buffer &buffer,
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it_a it,
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const it_b &end,
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closure&& lambda)
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{
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if(it != end)
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{
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lambda(buffer, *it);
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for(++it; it != end; ++it)
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{
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json::printer(buffer, json::printer.value_sep);
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lambda(buffer, *it);
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}
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}
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}
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template<class it>
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void
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ircd::json::input<it>::throws_exceeded()
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{
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throw recursion_limit
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{
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"Maximum recursion depth exceeded"
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};
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// iov.h
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//
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std::ostream &
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ircd::json::operator<<(std::ostream &s, const iov &iov)
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{
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s << json::strung(iov);
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return s;
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}
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ircd::string_view
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ircd::json::stringify(mutable_buffer &head,
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const iov &iov)
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{
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const member *m[iov.size()];
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std::transform(std::begin(iov), std::end(iov), m, []
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(const member &m)
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{
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return &m;
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});
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std::sort(m, m + iov.size(), []
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(const member *const &a, const member *const &b)
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{
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return *a < *b;
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});
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return stringify(head, m, m + iov.size());
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}
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size_t
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ircd::json::serialized(const iov &iov)
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{
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const size_t ret
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{
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1U + iov.empty()
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};
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return std::accumulate(std::begin(iov), std::end(iov), ret, []
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(auto ret, const auto &member)
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{
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return ret += serialized(member) + 1;
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});
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}
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bool
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ircd::json::iov::has(const string_view &key)
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const
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{
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return std::any_of(std::begin(*this), std::end(*this), [&key]
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(const auto &member)
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{
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return string_view{member.first} == key;
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});
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}
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const ircd::json::value &
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ircd::json::iov::at(const string_view &key)
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const
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{
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const auto it
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{
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std::find_if(std::begin(*this), std::end(*this), [&key]
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(const auto &member)
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{
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return string_view{member.first} == key;
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})
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};
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if(it == std::end(*this))
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throw not_found
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{
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"key '%s' not found", key
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};
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return it->second;
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}
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ircd::json::iov::add::add(iov &iov,
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member member)
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:node
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{
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iov, [&iov, &member]
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{
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if(iov.has(member.first))
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throw exists("failed to add member '%s': already exists",
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string_view{member.first});
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return std::move(member);
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}()
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}
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{
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}
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ircd::json::iov::add_if::add_if(iov &iov,
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const bool &b,
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member member)
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:node
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{
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iov, std::move(member)
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}
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{
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if(!b)
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iov.pop_front();
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}
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ircd::json::iov::set::set(iov &iov, member member)
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:node
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{
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iov, [&iov, &member]
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{
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iov.remove_if([&member](const auto &existing)
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{
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return string_view{existing.first} == string_view{member.first};
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});
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return std::move(member);
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}()
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}
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{
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}
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ircd::json::iov::set_if::set_if(iov &iov,
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const bool &b,
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member member)
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:node
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{
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iov, std::move(member)
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}
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{
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if(!b)
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iov.pop_front();
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}
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ircd::json::iov::defaults::defaults(iov &iov,
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member member)
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:node
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{
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iov, std::move(member)
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}
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{
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const auto count
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{
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std::count_if(std::begin(iov), std::end(iov), [&member]
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(const auto &existing)
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{
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return string_view{existing.first} == string_view{member.first};
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})
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};
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if(count > 1)
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iov.pop_front();
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}
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ircd::json::iov::defaults_if::defaults_if(iov &iov,
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const bool &b,
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member member)
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:node
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{
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iov, std::move(member)
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}
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{
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if(!b)
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iov.pop_front();
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// json/vector.h
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//
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ircd::json::vector::const_iterator &
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ircd::json::vector::const_iterator::operator++()
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try
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{
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static const qi::rule<const char *, string_view> parse_next
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{
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raw[parser.object(0)] | qi::eoi
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,"next vector element or end"
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};
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string_view state;
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qi::parse(start, stop, eps > parse_next, state);
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this->state = state;
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return *this;
|
|
}
|
|
catch(const qi::expectation_failure<const char *> &e)
|
|
{
|
|
throw expectation_failure(start, e);
|
|
}
|
|
|
|
ircd::json::vector::const_iterator
|
|
ircd::json::vector::begin()
|
|
const try
|
|
{
|
|
static const qi::rule<const char *, string_view> parse_begin
|
|
{
|
|
raw[parser.object(0)]
|
|
,"object vector element"
|
|
};
|
|
|
|
const_iterator ret
|
|
{
|
|
string_view::begin(), string_view::end()
|
|
};
|
|
|
|
if(!string_view{*this}.empty())
|
|
{
|
|
string_view state;
|
|
qi::parse(ret.start, ret.stop, eps > parse_begin, state);
|
|
ret.state = state;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
catch(const qi::expectation_failure<const char *> &e)
|
|
{
|
|
throw expectation_failure(string_view::begin(), e);
|
|
}
|
|
|
|
ircd::json::vector::const_iterator
|
|
ircd::json::vector::end()
|
|
const
|
|
{
|
|
return { string_view::end(), string_view::end() };
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// json/member.h
|
|
//
|
|
|
|
ircd::string_view
|
|
ircd::json::stringify(mutable_buffer &buf,
|
|
const members &list)
|
|
{
|
|
return stringify(buf, std::begin(list), std::end(list));
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::json::stringify(mutable_buffer &buf,
|
|
const member &m)
|
|
{
|
|
return stringify(buf, &m, &m + 1);
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::json::stringify(mutable_buffer &buf,
|
|
const member *const &begin,
|
|
const member *const &end)
|
|
{
|
|
const auto num(std::distance(begin, end));
|
|
const member *vec[num];
|
|
for(auto i(0); i < num; ++i)
|
|
vec[i] = begin + i;
|
|
|
|
return stringify(buf, vec, vec + num);
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::json::stringify(mutable_buffer &buf,
|
|
const member *const *const &b,
|
|
const member *const *const &e)
|
|
{
|
|
const auto print_member
|
|
{
|
|
[](mutable_buffer &buf, const auto &it)
|
|
{
|
|
const auto &m(*it);
|
|
printer(buf, printer.name << printer.name_sep, m.first);
|
|
stringify(buf, m.second);
|
|
}
|
|
};
|
|
|
|
char *const start{begin(buf)};
|
|
printer(buf, printer.object_begin);
|
|
printer::list_protocol(buf, b, e, print_member);
|
|
printer(buf, printer.object_end);
|
|
return { start, begin(buf) };
|
|
}
|
|
|
|
size_t
|
|
ircd::json::serialized(const members &m)
|
|
{
|
|
return serialized(std::begin(m), std::end(m));
|
|
}
|
|
|
|
size_t
|
|
ircd::json::serialized(const member *const &begin,
|
|
const member *const &end)
|
|
{
|
|
const size_t ret(1 + !std::distance(begin, end));
|
|
return std::accumulate(begin, end, ret, []
|
|
(auto ret, const auto &member)
|
|
{
|
|
return ret += serialized(member) + 1;
|
|
});
|
|
}
|
|
|
|
size_t
|
|
ircd::json::serialized(const member &member)
|
|
{
|
|
return serialized(member.first) + 1 + serialized(member.second);
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// json/object.h
|
|
//
|
|
|
|
decltype(ircd::json::object::max_recursion_depth)
|
|
const ircd::json::object::max_recursion_depth
|
|
{
|
|
32
|
|
};
|
|
|
|
std::ostream &
|
|
ircd::json::operator<<(std::ostream &s, const object::member &member)
|
|
{
|
|
s << json::strung(member);
|
|
return s;
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::json::stringify(mutable_buffer &buf,
|
|
const object::member &member)
|
|
{
|
|
char *const start(begin(buf));
|
|
printer(buf, printer.name, member.first);
|
|
printer(buf, printer.name_sep);
|
|
consume(buf, copy(buf, member.second));
|
|
return string_view { start, begin(buf) };
|
|
}
|
|
|
|
size_t
|
|
ircd::json::serialized(const object::member &member)
|
|
{
|
|
return serialized(member.first) + 1 + serialized(member.second);
|
|
}
|
|
|
|
std::ostream &
|
|
ircd::json::operator<<(std::ostream &s, const object &object)
|
|
{
|
|
s << json::strung(object);
|
|
return s;
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::json::stringify(mutable_buffer &buf,
|
|
const object &object)
|
|
{
|
|
const auto b(std::begin(object));
|
|
const auto e(std::end(object));
|
|
char *const start(begin(buf));
|
|
static const auto stringify_member
|
|
{
|
|
[](mutable_buffer &buf, const object::member &member)
|
|
{
|
|
stringify(buf, member);
|
|
}
|
|
};
|
|
|
|
printer(buf, printer.object_begin);
|
|
printer::list_protocol(buf, b, e, stringify_member);
|
|
printer(buf, printer.object_end);
|
|
return { start, begin(buf) };
|
|
}
|
|
|
|
size_t
|
|
ircd::json::serialized(const object &object)
|
|
{
|
|
const auto begin(std::begin(object));
|
|
const auto end(std::end(object));
|
|
const size_t ret(1 + (begin == end));
|
|
return std::accumulate(begin, end, ret, []
|
|
(auto ret, const object::member &member)
|
|
{
|
|
return ret += serialized(member) + 1;
|
|
});
|
|
}
|
|
|
|
ircd::json::object::const_iterator &
|
|
ircd::json::object::const_iterator::operator++()
|
|
try
|
|
{
|
|
static const qi::rule<const char *, json::object::member> member
|
|
{
|
|
parser.name >> parser.name_sep >> raw[parser.value(0)]
|
|
,"next object member"
|
|
};
|
|
|
|
static const qi::rule<const char *, json::object::member> parse_next
|
|
{
|
|
(parser.value_sep >> member) | parser.object_end
|
|
,"next object member or end"
|
|
};
|
|
|
|
state.first = string_view{};
|
|
state.second = string_view{};
|
|
qi::parse(start, stop, eps > parse_next, state);
|
|
return *this;
|
|
}
|
|
catch(const qi::expectation_failure<const char *> &e)
|
|
{
|
|
throw expectation_failure(start, e);
|
|
}
|
|
|
|
ircd::json::object::operator std::string()
|
|
const
|
|
{
|
|
return json::strung(*this);
|
|
}
|
|
|
|
ircd::json::object::const_iterator
|
|
ircd::json::object::begin()
|
|
const try
|
|
{
|
|
static const qi::rule<const char *, json::object::member> object_member
|
|
{
|
|
parser.name >> parser.name_sep >> raw[parser.value(0)]
|
|
,"object member"
|
|
};
|
|
|
|
static const qi::rule<const char *, json::object::member> parse_begin
|
|
{
|
|
parser.object_begin >> (parser.object_end | object_member)
|
|
,"object begin and member or end"
|
|
};
|
|
|
|
const_iterator ret
|
|
{
|
|
string_view::begin(), string_view::end()
|
|
};
|
|
|
|
if(!string_view{*this}.empty())
|
|
qi::parse(ret.start, ret.stop, eps > parse_begin, ret.state);
|
|
|
|
return ret;
|
|
}
|
|
catch(const qi::expectation_failure<const char *> &e)
|
|
{
|
|
throw expectation_failure(string_view::begin(), e);
|
|
}
|
|
|
|
ircd::json::object::const_iterator
|
|
ircd::json::object::end()
|
|
const
|
|
{
|
|
return { string_view::end(), string_view::end() };
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// json/array.h
|
|
//
|
|
|
|
decltype(ircd::json::array::max_recursion_depth)
|
|
ircd::json::array::max_recursion_depth
|
|
{
|
|
32
|
|
};
|
|
|
|
ircd::string_view
|
|
ircd::json::stringify(mutable_buffer &buf,
|
|
const array &v)
|
|
{
|
|
if(string_view{v}.empty())
|
|
{
|
|
consume(buf, copy(buf, empty_array));
|
|
return empty_array;
|
|
}
|
|
|
|
consume(buf, copy(buf, string_view{v}));
|
|
return string_view{v};
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::json::stringify(mutable_buffer &buf,
|
|
const std::string *const &b,
|
|
const std::string *const &e)
|
|
{
|
|
return array::stringify(buf, b, e);
|
|
}
|
|
|
|
size_t
|
|
ircd::json::serialized(const std::string *const &b,
|
|
const std::string *const &e)
|
|
{
|
|
const size_t ret(1 + !std::distance(b, e));
|
|
return std::accumulate(b, e, ret, []
|
|
(auto ret, const auto &value)
|
|
{
|
|
return ret += serialized(string_view{value}) + 1;
|
|
});
|
|
}
|
|
|
|
size_t
|
|
ircd::json::serialized(const string_view *const &b,
|
|
const string_view *const &e)
|
|
{
|
|
const size_t ret(1 + !std::distance(b, e));
|
|
return std::accumulate(b, e, ret, []
|
|
(auto ret, const auto &value)
|
|
{
|
|
return ret += serialized(value) + 1;
|
|
});
|
|
}
|
|
|
|
template<class it>
|
|
ircd::string_view
|
|
ircd::json::array::stringify(mutable_buffer &buf,
|
|
const it &b,
|
|
const it &e)
|
|
{
|
|
static const auto print_element
|
|
{
|
|
[](mutable_buffer &buf, const string_view &element)
|
|
{
|
|
if(!consume(buf, ircd::buffer::copy(buf, element)))
|
|
throw print_error("The JSON generator ran out of space in supplied buffer");
|
|
}
|
|
};
|
|
|
|
char *const start(std::begin(buf));
|
|
printer(buf, printer.array_begin);
|
|
printer::list_protocol(buf, b, e, print_element);
|
|
printer(buf, printer.array_end);
|
|
return { start, std::begin(buf) };
|
|
}
|
|
|
|
std::ostream &
|
|
ircd::json::operator<<(std::ostream &s, const array &a)
|
|
{
|
|
s << json::strung(a);
|
|
return s;
|
|
}
|
|
|
|
ircd::json::array::const_iterator &
|
|
ircd::json::array::const_iterator::operator++()
|
|
try
|
|
{
|
|
static const qi::rule<const char *, string_view> value
|
|
{
|
|
raw[parser.value(0)]
|
|
,"array element"
|
|
};
|
|
|
|
static const qi::rule<const char *, string_view> parse_next
|
|
{
|
|
parser.array_end | (parser.value_sep >> value)
|
|
,"next array element or end"
|
|
};
|
|
|
|
state = string_view{};
|
|
qi::parse(start, stop, eps > parse_next, state);
|
|
return *this;
|
|
}
|
|
catch(const qi::expectation_failure<const char *> &e)
|
|
{
|
|
throw expectation_failure(start, e);
|
|
}
|
|
|
|
ircd::json::array::operator std::string()
|
|
const
|
|
{
|
|
return json::strung(*this);
|
|
}
|
|
|
|
ircd::json::array::const_iterator
|
|
ircd::json::array::begin()
|
|
const try
|
|
{
|
|
static const qi::rule<const char *, string_view> value
|
|
{
|
|
raw[parser.value(0)]
|
|
,"array element"
|
|
};
|
|
|
|
static const qi::rule<const char *, string_view> parse_begin
|
|
{
|
|
parser.array_begin >> (parser.array_end | value)
|
|
,"array begin and element or end"
|
|
};
|
|
|
|
const_iterator ret
|
|
{
|
|
string_view::begin(), string_view::end()
|
|
};
|
|
|
|
if(!string_view{*this}.empty())
|
|
qi::parse(ret.start, ret.stop, eps > parse_begin, ret.state);
|
|
|
|
return ret;
|
|
}
|
|
catch(const qi::expectation_failure<const char *> &e)
|
|
{
|
|
throw expectation_failure(string_view::begin(), e);
|
|
}
|
|
|
|
ircd::json::array::const_iterator
|
|
ircd::json::array::end()
|
|
const
|
|
{
|
|
return { string_view::end(), string_view::end() };
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// json/value.h
|
|
//
|
|
|
|
const ircd::string_view ircd::json::literal_null { "null" };
|
|
const ircd::string_view ircd::json::literal_true { "true" };
|
|
const ircd::string_view ircd::json::literal_false { "false" };
|
|
const ircd::string_view ircd::json::empty_string { "\"\"" };
|
|
const ircd::string_view ircd::json::empty_object { "{}" };
|
|
const ircd::string_view ircd::json::empty_array { "[]" };
|
|
|
|
std::ostream &
|
|
ircd::json::operator<<(std::ostream &s, const value &v)
|
|
{
|
|
s << json::strung(v);
|
|
return s;
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::json::stringify(mutable_buffer &buf,
|
|
const value *const &b,
|
|
const value *const &e)
|
|
{
|
|
static const auto print_value
|
|
{
|
|
[](mutable_buffer &buf, const value &value)
|
|
{
|
|
stringify(buf, value);
|
|
}
|
|
};
|
|
|
|
char *const start(begin(buf));
|
|
printer(buf, printer.array_begin);
|
|
printer::list_protocol(buf, b, e, print_value);
|
|
printer(buf, printer.array_end);
|
|
return { start, begin(buf) };
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::json::stringify(mutable_buffer &buf,
|
|
const value &v)
|
|
{
|
|
const auto start
|
|
{
|
|
begin(buf)
|
|
};
|
|
|
|
switch(v.type)
|
|
{
|
|
case STRING:
|
|
{
|
|
const string_view sv{v};
|
|
printer(buf, printer.string, sv);
|
|
break;
|
|
}
|
|
|
|
case LITERAL:
|
|
{
|
|
consume(buf, copy(buf, string_view{v}));
|
|
break;
|
|
}
|
|
|
|
case OBJECT:
|
|
{
|
|
if(v.serial)
|
|
{
|
|
consume(buf, copy(buf, string_view{v}));
|
|
break;
|
|
}
|
|
|
|
if(v.object)
|
|
{
|
|
stringify(buf, v.object, v.object + v.len);
|
|
break;
|
|
}
|
|
|
|
//consume(buf, copy(buf, literal_null));
|
|
consume(buf, copy(buf, empty_object));
|
|
break;
|
|
}
|
|
|
|
case ARRAY:
|
|
{
|
|
if(v.serial)
|
|
{
|
|
consume(buf, copy(buf, string_view{v}));
|
|
break;
|
|
}
|
|
|
|
if(v.array)
|
|
{
|
|
stringify(buf, v.array, v.array + v.len);
|
|
break;
|
|
}
|
|
|
|
//consume(buf, copy(buf, literal_null));
|
|
consume(buf, copy(buf, empty_array));
|
|
break;
|
|
}
|
|
|
|
case NUMBER:
|
|
{
|
|
if(v.serial)
|
|
{
|
|
consume(buf, copy(buf, string_view{v}));
|
|
break;
|
|
}
|
|
|
|
if(v.floats)
|
|
printer(buf, double_, v.floating);
|
|
else
|
|
printer(buf, long_, v.integer);
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
return { start, begin(buf) };
|
|
}
|
|
|
|
size_t
|
|
ircd::json::serialized(const values &v)
|
|
{
|
|
return serialized(std::begin(v), std::end(v));
|
|
}
|
|
|
|
size_t
|
|
ircd::json::serialized(const value *const &begin,
|
|
const value *const &end)
|
|
{
|
|
// One opening '[' and either one ']' or comma count.
|
|
const size_t ret(1 + !std::distance(begin, end));
|
|
return std::accumulate(begin, end, size_t(ret), []
|
|
(auto ret, const value &v)
|
|
{
|
|
return ret += serialized(v) + 1; // 1 comma
|
|
});
|
|
}
|
|
|
|
size_t
|
|
ircd::json::serialized(const value &v)
|
|
{
|
|
switch(v.type)
|
|
{
|
|
case OBJECT:
|
|
return v.serial? v.len : serialized(v.object, v.object + v.len);
|
|
|
|
case ARRAY:
|
|
return v.serial? v.len : serialized(v.array, v.array + v.len);
|
|
|
|
case LITERAL:
|
|
{
|
|
return v.serial? v.len : serialized(bool(v.integer));
|
|
}
|
|
|
|
case NUMBER:
|
|
{
|
|
if(v.serial)
|
|
return v.len;
|
|
|
|
static thread_local char test_buffer[4096];
|
|
const auto test
|
|
{
|
|
stringify(mutable_buffer{test_buffer}, v)
|
|
};
|
|
|
|
return test.size();
|
|
}
|
|
|
|
case STRING:
|
|
{
|
|
if(!v.string)
|
|
return 2;
|
|
|
|
size_t ret(v.len);
|
|
const string_view sv{v.string, v.len};
|
|
ret += !startswith(sv, '"');
|
|
ret += !endswith(sv, '"');
|
|
return ret;
|
|
}
|
|
};
|
|
|
|
throw type_error("deciding the size of a type[%u] is undefined", int(v.type));
|
|
}
|
|
|
|
//
|
|
// json::value
|
|
//
|
|
|
|
ircd::json::value::value(const json::members &members)
|
|
:string{nullptr}
|
|
,len{serialized(members)}
|
|
,type{OBJECT}
|
|
,serial{true}
|
|
,alloc{true}
|
|
,floats{false}
|
|
{
|
|
create_string(len, [&members]
|
|
(mutable_buffer buffer)
|
|
{
|
|
json::stringify(buffer, members);
|
|
});
|
|
}
|
|
|
|
ircd::json::value::value(const value &other)
|
|
:integer{other.integer}
|
|
,len{other.len}
|
|
,type{other.type}
|
|
,serial{other.serial}
|
|
,alloc{other.alloc}
|
|
,floats{other.floats}
|
|
{
|
|
if(alloc && serial)
|
|
{
|
|
create_string(len, [this](mutable_buffer buffer)
|
|
{
|
|
copy(buffer, string_view{*this});
|
|
});
|
|
}
|
|
else switch(type)
|
|
{
|
|
case OBJECT:
|
|
{
|
|
if(serial || !object)
|
|
break;
|
|
|
|
const size_t count(this->len);
|
|
create_string(serialized(object, object + count), [this, &count]
|
|
(mutable_buffer buffer)
|
|
{
|
|
json::stringify(buffer, object, object + count);
|
|
});
|
|
break;
|
|
}
|
|
|
|
case ARRAY:
|
|
{
|
|
if(serial || !array)
|
|
break;
|
|
|
|
const size_t count(this->len);
|
|
create_string(serialized(array, array + count), [this, &count]
|
|
(mutable_buffer buffer)
|
|
{
|
|
json::stringify(buffer, array, array + count);
|
|
});
|
|
break;
|
|
}
|
|
|
|
case STRING:
|
|
{
|
|
if(serial || !alloc || !string)
|
|
break;
|
|
|
|
create_string(serialized(*this), [this]
|
|
(mutable_buffer buffer)
|
|
{
|
|
json::stringify(buffer, *this);
|
|
});
|
|
break;
|
|
}
|
|
|
|
case LITERAL:
|
|
case NUMBER:
|
|
break;
|
|
}
|
|
}
|
|
|
|
ircd::json::value &
|
|
ircd::json::value::operator=(const value &other)
|
|
{
|
|
this->~value();
|
|
new (this) value(other);
|
|
return *this;
|
|
}
|
|
|
|
ircd::json::value::~value()
|
|
noexcept
|
|
{
|
|
if(!alloc)
|
|
return;
|
|
|
|
else if(serial)
|
|
delete[] string;
|
|
|
|
else switch(type)
|
|
{
|
|
case STRING:
|
|
delete[] string;
|
|
break;
|
|
|
|
case OBJECT:
|
|
delete[] object;
|
|
break;
|
|
|
|
case ARRAY:
|
|
delete[] array;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
ircd::json::value::operator std::string()
|
|
const
|
|
{
|
|
return json::strung(*this);
|
|
}
|
|
|
|
ircd::json::value::operator string_view()
|
|
const
|
|
{
|
|
switch(type)
|
|
{
|
|
case STRING:
|
|
return unquote(string_view{string, len});
|
|
|
|
case NUMBER:
|
|
return serial? string_view{string, len}:
|
|
floats? byte_view<string_view>{floating}:
|
|
byte_view<string_view>{integer};
|
|
case ARRAY:
|
|
case OBJECT:
|
|
case LITERAL:
|
|
if(likely(serial))
|
|
return string_view{string, len};
|
|
else
|
|
break;
|
|
}
|
|
|
|
throw type_error("value type[%d] is not a string", int(type));
|
|
}
|
|
|
|
ircd::json::value::operator int64_t()
|
|
const
|
|
{
|
|
switch(type)
|
|
{
|
|
case NUMBER:
|
|
return likely(!floats)? integer : floating;
|
|
|
|
case STRING:
|
|
return lex_cast<int64_t>(string_view{*this});
|
|
|
|
case ARRAY:
|
|
case OBJECT:
|
|
case LITERAL:
|
|
break;
|
|
}
|
|
|
|
throw type_error("value type[%d] is not an int64_t", int(type));
|
|
}
|
|
|
|
ircd::json::value::operator double()
|
|
const
|
|
{
|
|
switch(type)
|
|
{
|
|
case NUMBER:
|
|
return likely(floats)? floating : integer;
|
|
|
|
case STRING:
|
|
return lex_cast<double>(string_view{*this});
|
|
|
|
case ARRAY:
|
|
case OBJECT:
|
|
case LITERAL:
|
|
break;
|
|
}
|
|
|
|
throw type_error("value type[%d] is not a float", int(type));
|
|
}
|
|
|
|
bool
|
|
ircd::json::value::operator!()
|
|
const
|
|
{
|
|
switch(type)
|
|
{
|
|
case NUMBER:
|
|
return floats? !(floating > 0.0 || floating < 0.0):
|
|
!bool(integer);
|
|
|
|
case STRING:
|
|
return string? !len || string_view{*this} == empty_string:
|
|
true;
|
|
|
|
case OBJECT:
|
|
return serial? !len || string_view{*this} == empty_object:
|
|
object? !len:
|
|
true;
|
|
|
|
case ARRAY:
|
|
return serial? !len || (string_view{*this} == empty_array):
|
|
array? !len:
|
|
true;
|
|
|
|
case LITERAL:
|
|
if(serial)
|
|
return string == nullptr ||
|
|
string_view{*this} == literal_false ||
|
|
string_view{*this} == literal_null;
|
|
break;
|
|
};
|
|
|
|
throw type_error("deciding if a type[%u] is falsy is undefined", int(type));
|
|
}
|
|
|
|
bool
|
|
ircd::json::value::empty()
|
|
const
|
|
{
|
|
switch(type)
|
|
{
|
|
case NUMBER:
|
|
return serial? !len:
|
|
floats? !(floating > 0.0 || floating < 0.0):
|
|
!bool(integer);
|
|
|
|
case STRING:
|
|
return !string || !len || (serial && string_view{*this} == empty_string);
|
|
|
|
case OBJECT:
|
|
return serial? !len || string_view{*this} == empty_object:
|
|
object? !len:
|
|
true;
|
|
|
|
case ARRAY:
|
|
return serial? !len || string_view{*this} == empty_array:
|
|
array? false:
|
|
true; //TODO: XXX arr
|
|
|
|
case LITERAL:
|
|
return serial? !len:
|
|
true;
|
|
};
|
|
|
|
throw type_error("deciding if a type[%u] is empty is undefined", int(type));
|
|
}
|
|
|
|
bool
|
|
ircd::json::value::null()
|
|
const
|
|
{
|
|
switch(type)
|
|
{
|
|
case NUMBER:
|
|
return floats? !(floating > 0.0 || floating < 0.0):
|
|
!bool(integer);
|
|
|
|
case STRING:
|
|
return string == nullptr;
|
|
|
|
case OBJECT:
|
|
return serial? string == nullptr:
|
|
object? false:
|
|
true;
|
|
|
|
case ARRAY:
|
|
return serial? string == nullptr:
|
|
array? array == nullptr:
|
|
true;
|
|
|
|
case LITERAL:
|
|
return serial? string == nullptr:
|
|
true;
|
|
};
|
|
|
|
throw type_error("deciding if a type[%u] is null is undefined", int(type));
|
|
}
|
|
|
|
bool
|
|
ircd::json::value::undefined()
|
|
const
|
|
{
|
|
switch(type)
|
|
{
|
|
case NUMBER:
|
|
return false;
|
|
|
|
case STRING:
|
|
return string == nullptr;
|
|
|
|
case OBJECT:
|
|
return serial? string == nullptr:
|
|
object? false:
|
|
true;
|
|
|
|
case ARRAY:
|
|
return serial? string == nullptr:
|
|
array? false:
|
|
true;
|
|
|
|
case LITERAL:
|
|
return serial? string == nullptr:
|
|
true;
|
|
};
|
|
|
|
throw type_error("deciding if a type[%u] is undefined is undefined", int(type));
|
|
}
|
|
|
|
void
|
|
ircd::json::value::create_string(const size_t &len,
|
|
const create_string_closure &closure)
|
|
{
|
|
const size_t max
|
|
{
|
|
len + 1
|
|
};
|
|
|
|
std::unique_ptr<char[]> string
|
|
{
|
|
new char[max]
|
|
};
|
|
|
|
const mutable_buffer buffer
|
|
{
|
|
string.get(), len
|
|
};
|
|
|
|
closure(buffer);
|
|
(string.get())[len] = '\0';
|
|
this->alloc = true;
|
|
this->serial = true;
|
|
this->len = len;
|
|
this->string = string.release();
|
|
}
|
|
|
|
bool
|
|
ircd::json::operator>(const value &a, const value &b)
|
|
{
|
|
if(unlikely(type(a) != STRING || type(b) != STRING))
|
|
throw type_error("cannot compare values");
|
|
|
|
return static_cast<string_view>(a) > static_cast<string_view>(b);
|
|
}
|
|
|
|
bool
|
|
ircd::json::operator<(const value &a, const value &b)
|
|
{
|
|
if(unlikely(type(a) != STRING || type(b) != STRING))
|
|
throw type_error("cannot compare values");
|
|
|
|
return static_cast<string_view>(a) < static_cast<string_view>(b);
|
|
}
|
|
|
|
bool
|
|
ircd::json::operator>=(const value &a, const value &b)
|
|
{
|
|
if(unlikely(type(a) != STRING || type(b) != STRING))
|
|
throw type_error("cannot compare values");
|
|
|
|
return static_cast<string_view>(a) >= static_cast<string_view>(b);
|
|
}
|
|
|
|
bool
|
|
ircd::json::operator<=(const value &a, const value &b)
|
|
{
|
|
if(unlikely(type(a) != STRING || type(b) != STRING))
|
|
throw type_error("cannot compare values");
|
|
|
|
return static_cast<string_view>(a) <= static_cast<string_view>(b);
|
|
}
|
|
|
|
bool
|
|
ircd::json::operator!=(const value &a, const value &b)
|
|
{
|
|
if(unlikely(type(a) != STRING || type(b) != STRING))
|
|
throw type_error("cannot compare values");
|
|
|
|
return static_cast<string_view>(a) != static_cast<string_view>(b);
|
|
}
|
|
|
|
bool
|
|
ircd::json::operator==(const value &a, const value &b)
|
|
{
|
|
if(unlikely(type(a) != STRING || type(b) != STRING))
|
|
throw type_error("cannot compare values");
|
|
|
|
return static_cast<string_view>(a) == static_cast<string_view>(b);
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// json.h
|
|
//
|
|
|
|
std::string
|
|
ircd::json::canonize(const string_view &in)
|
|
{
|
|
std::string ret(size(in), char{});
|
|
ret.resize(size(canonize(mutable_buffer{ret}, in)));
|
|
return ret;
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::json::canonize(const mutable_buffer &out,
|
|
const string_view &in)
|
|
try
|
|
{
|
|
//TODO: XXX
|
|
assert(0);
|
|
return in;
|
|
}
|
|
catch(const qi::expectation_failure<const char *> &e)
|
|
{
|
|
throw expectation_failure(begin(in), e);
|
|
}
|
|
|
|
bool
|
|
ircd::json::valid(const string_view &s,
|
|
std::nothrow_t)
|
|
noexcept try
|
|
{
|
|
const char *start(begin(s)), *const stop(end(s));
|
|
return qi::parse(start, stop, parser.value(0) >> eoi);
|
|
}
|
|
catch(...)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
void
|
|
ircd::json::valid(const string_view &s)
|
|
try
|
|
{
|
|
const char *start(begin(s)), *const stop(end(s));
|
|
qi::parse(start, stop, eps > (parser.value(0) >> eoi));
|
|
}
|
|
catch(const qi::expectation_failure<const char *> &e)
|
|
{
|
|
throw expectation_failure(begin(s), e);
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::json::stringify(mutable_buffer &buf,
|
|
const string_view &v)
|
|
{
|
|
if(v.empty() && defined(v))
|
|
{
|
|
consume(buf, copy(buf, empty_string));
|
|
return empty_string;
|
|
}
|
|
|
|
consume(buf, copy(buf, string_view{v}));
|
|
return string_view{v};
|
|
}
|
|
|
|
size_t
|
|
ircd::json::serialized(const string_view &s)
|
|
{
|
|
size_t ret
|
|
{
|
|
s.size()
|
|
};
|
|
|
|
switch(type(s, std::nothrow))
|
|
{
|
|
case NUMBER:
|
|
case OBJECT:
|
|
case ARRAY:
|
|
case LITERAL:
|
|
break;
|
|
|
|
case STRING:
|
|
ret += !startswith(s, '"');
|
|
ret += !endswith(s, '"');
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
enum ircd::json::type
|
|
ircd::json::type(const string_view &buf)
|
|
{
|
|
static const auto flag(qi::skip_flag::dont_postskip);
|
|
|
|
enum type ret;
|
|
if(!qi::phrase_parse(begin(buf), end(buf), parser.type, parser.WS, flag, ret))
|
|
throw type_error("Failed to get type from buffer");
|
|
|
|
return ret;
|
|
}
|
|
|
|
enum ircd::json::type
|
|
ircd::json::type(const string_view &buf,
|
|
std::nothrow_t)
|
|
{
|
|
static const auto flag(qi::skip_flag::dont_postskip);
|
|
|
|
enum type ret;
|
|
if(!qi::phrase_parse(begin(buf), end(buf), parser.type, parser.WS, flag, ret))
|
|
return STRING;
|
|
|
|
return ret;
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::json::reflect(const enum type &type)
|
|
{
|
|
switch(type)
|
|
{
|
|
case NUMBER: return "NUMBER";
|
|
case OBJECT: return "OBJECT";
|
|
case ARRAY: return "ARRAY";
|
|
case LITERAL: return "LITERAL";
|
|
case STRING: return "STRING";
|
|
}
|
|
|
|
return {};
|
|
}
|