basic_parser_impl.hpp

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1		//
2		// Copyright (c) 2019 Vinnie Falco (vinnie.falco@gmail.com)
3		// Copyright (c) 2020 Krystian Stasiowski (sdkrystian@gmail.com)
4		//
5		// Distributed under the Boost Software License, Version 1.0. (See accompanying
6		// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
7		//
8		// Official repository: https://github.com/boostorg/json
9		//
10
11		#ifndef BOOST_JSON_BASIC_PARSER_IMPL_HPP
12		#define BOOST_JSON_BASIC_PARSER_IMPL_HPP
13
14		#include <boost/json/detail/config.hpp>
15		#include <boost/json/detail/literals.hpp>
16		#include <boost/json/basic_parser.hpp>
17		#include <boost/json/error.hpp>
18		#include <boost/json/detail/buffer.hpp>
19		#include <boost/json/detail/charconv/from_chars.hpp>
20		#include <boost/json/detail/sse2.hpp>
21		#include <boost/mp11/algorithm.hpp>
22		#include <boost/mp11/integral.hpp>
23		#include <cmath>
24		#include <limits>
25		#include <cstring>
26
27		#ifdef _MSC_VER
28		#pragma warning(push)
29		#pragma warning(disable: 4702) // unreachable code
30		#pragma warning(disable: 4127) // conditional expression is constant
31		#endif
32
33		/* This file must be manually included to get the
34		function template definitions for basic_parser.
35		*/
36
37		/* Reference:
38
39		https://www.json.org/
40
41		RFC 7159: The JavaScript Object Notation (JSON) Data Interchange Format
42		https://tools.ietf.org/html/rfc7159
43
44		https://ampl.com/netlib/fp/dtoa.c
45		*/
46
47		#ifndef BOOST_JSON_DOCS
48
49		namespace boost {
50		namespace json {
51		namespace detail {
52
53		inline
54		double
55	1033693x	pow10(int exp) noexcept
56		{
57		static double const tab[618] = {
58		1e-308, 1e-307, 1e-306, 1e-305, 1e-304, 1e-303, 1e-302, 1e-301,
59
60		1e-300, 1e-299, 1e-298, 1e-297, 1e-296, 1e-295, 1e-294, 1e-293, 1e-292, 1e-291,
61		1e-290, 1e-289, 1e-288, 1e-287, 1e-286, 1e-285, 1e-284, 1e-283, 1e-282, 1e-281,
62		1e-280, 1e-279, 1e-278, 1e-277, 1e-276, 1e-275, 1e-274, 1e-273, 1e-272, 1e-271,
63		1e-270, 1e-269, 1e-268, 1e-267, 1e-266, 1e-265, 1e-264, 1e-263, 1e-262, 1e-261,
64		1e-260, 1e-259, 1e-258, 1e-257, 1e-256, 1e-255, 1e-254, 1e-253, 1e-252, 1e-251,
65		1e-250, 1e-249, 1e-248, 1e-247, 1e-246, 1e-245, 1e-244, 1e-243, 1e-242, 1e-241,
66		1e-240, 1e-239, 1e-238, 1e-237, 1e-236, 1e-235, 1e-234, 1e-233, 1e-232, 1e-231,
67		1e-230, 1e-229, 1e-228, 1e-227, 1e-226, 1e-225, 1e-224, 1e-223, 1e-222, 1e-221,
68		1e-220, 1e-219, 1e-218, 1e-217, 1e-216, 1e-215, 1e-214, 1e-213, 1e-212, 1e-211,
69		1e-210, 1e-209, 1e-208, 1e-207, 1e-206, 1e-205, 1e-204, 1e-203, 1e-202, 1e-201,
70
71		1e-200, 1e-199, 1e-198, 1e-197, 1e-196, 1e-195, 1e-194, 1e-193, 1e-192, 1e-191,
72		1e-190, 1e-189, 1e-188, 1e-187, 1e-186, 1e-185, 1e-184, 1e-183, 1e-182, 1e-181,
73		1e-180, 1e-179, 1e-178, 1e-177, 1e-176, 1e-175, 1e-174, 1e-173, 1e-172, 1e-171,
74		1e-170, 1e-169, 1e-168, 1e-167, 1e-166, 1e-165, 1e-164, 1e-163, 1e-162, 1e-161,
75		1e-160, 1e-159, 1e-158, 1e-157, 1e-156, 1e-155, 1e-154, 1e-153, 1e-152, 1e-151,
76		1e-150, 1e-149, 1e-148, 1e-147, 1e-146, 1e-145, 1e-144, 1e-143, 1e-142, 1e-141,
77		1e-140, 1e-139, 1e-138, 1e-137, 1e-136, 1e-135, 1e-134, 1e-133, 1e-132, 1e-131,
78		1e-130, 1e-129, 1e-128, 1e-127, 1e-126, 1e-125, 1e-124, 1e-123, 1e-122, 1e-121,
79		1e-120, 1e-119, 1e-118, 1e-117, 1e-116, 1e-115, 1e-114, 1e-113, 1e-112, 1e-111,
80		1e-110, 1e-109, 1e-108, 1e-107, 1e-106, 1e-105, 1e-104, 1e-103, 1e-102, 1e-101,
81
82		1e-100, 1e-099, 1e-098, 1e-097, 1e-096, 1e-095, 1e-094, 1e-093, 1e-092, 1e-091,
83		1e-090, 1e-089, 1e-088, 1e-087, 1e-086, 1e-085, 1e-084, 1e-083, 1e-082, 1e-081,
84		1e-080, 1e-079, 1e-078, 1e-077, 1e-076, 1e-075, 1e-074, 1e-073, 1e-072, 1e-071,
85		1e-070, 1e-069, 1e-068, 1e-067, 1e-066, 1e-065, 1e-064, 1e-063, 1e-062, 1e-061,
86		1e-060, 1e-059, 1e-058, 1e-057, 1e-056, 1e-055, 1e-054, 1e-053, 1e-052, 1e-051,
87		1e-050, 1e-049, 1e-048, 1e-047, 1e-046, 1e-045, 1e-044, 1e-043, 1e-042, 1e-041,
88		1e-040, 1e-039, 1e-038, 1e-037, 1e-036, 1e-035, 1e-034, 1e-033, 1e-032, 1e-031,
89		1e-030, 1e-029, 1e-028, 1e-027, 1e-026, 1e-025, 1e-024, 1e-023, 1e-022, 1e-021,
90		1e-020, 1e-019, 1e-018, 1e-017, 1e-016, 1e-015, 1e-014, 1e-013, 1e-012, 1e-011,
91		1e-010, 1e-009, 1e-008, 1e-007, 1e-006, 1e-005, 1e-004, 1e-003, 1e-002, 1e-001,
92
93		1e+000, 1e+001, 1e+002, 1e+003, 1e+004, 1e+005, 1e+006, 1e+007, 1e+008, 1e+009,
94		1e+010, 1e+011, 1e+012, 1e+013, 1e+014, 1e+015, 1e+016, 1e+017, 1e+018, 1e+019,
95		1e+020, 1e+021, 1e+022, 1e+023, 1e+024, 1e+025, 1e+026, 1e+027, 1e+028, 1e+029,
96		1e+030, 1e+031, 1e+032, 1e+033, 1e+034, 1e+035, 1e+036, 1e+037, 1e+038, 1e+039,
97		1e+040, 1e+041, 1e+042, 1e+043, 1e+044, 1e+045, 1e+046, 1e+047, 1e+048, 1e+049,
98		1e+050, 1e+051, 1e+052, 1e+053, 1e+054, 1e+055, 1e+056, 1e+057, 1e+058, 1e+059,
99		1e+060, 1e+061, 1e+062, 1e+063, 1e+064, 1e+065, 1e+066, 1e+067, 1e+068, 1e+069,
100		1e+070, 1e+071, 1e+072, 1e+073, 1e+074, 1e+075, 1e+076, 1e+077, 1e+078, 1e+079,
101		1e+080, 1e+081, 1e+082, 1e+083, 1e+084, 1e+085, 1e+086, 1e+087, 1e+088, 1e+089,
102		1e+090, 1e+091, 1e+092, 1e+093, 1e+094, 1e+095, 1e+096, 1e+097, 1e+098, 1e+099,
103
104		1e+100, 1e+101, 1e+102, 1e+103, 1e+104, 1e+105, 1e+106, 1e+107, 1e+108, 1e+109,
105		1e+110, 1e+111, 1e+112, 1e+113, 1e+114, 1e+115, 1e+116, 1e+117, 1e+118, 1e+119,
106		1e+120, 1e+121, 1e+122, 1e+123, 1e+124, 1e+125, 1e+126, 1e+127, 1e+128, 1e+129,
107		1e+130, 1e+131, 1e+132, 1e+133, 1e+134, 1e+135, 1e+136, 1e+137, 1e+138, 1e+139,
108		1e+140, 1e+141, 1e+142, 1e+143, 1e+144, 1e+145, 1e+146, 1e+147, 1e+148, 1e+149,
109		1e+150, 1e+151, 1e+152, 1e+153, 1e+154, 1e+155, 1e+156, 1e+157, 1e+158, 1e+159,
110		1e+160, 1e+161, 1e+162, 1e+163, 1e+164, 1e+165, 1e+166, 1e+167, 1e+168, 1e+169,
111		1e+170, 1e+171, 1e+172, 1e+173, 1e+174, 1e+175, 1e+176, 1e+177, 1e+178, 1e+179,
112		1e+180, 1e+181, 1e+182, 1e+183, 1e+184, 1e+185, 1e+186, 1e+187, 1e+188, 1e+189,
113		1e+190, 1e+191, 1e+192, 1e+193, 1e+194, 1e+195, 1e+196, 1e+197, 1e+198, 1e+199,
114
115		1e+200, 1e+201, 1e+202, 1e+203, 1e+204, 1e+205, 1e+206, 1e+207, 1e+208, 1e+209,
116		1e+210, 1e+211, 1e+212, 1e+213, 1e+214, 1e+215, 1e+216, 1e+217, 1e+218, 1e+219,
117		1e+220, 1e+221, 1e+222, 1e+223, 1e+224, 1e+225, 1e+226, 1e+227, 1e+228, 1e+229,
118		1e+230, 1e+231, 1e+232, 1e+233, 1e+234, 1e+235, 1e+236, 1e+237, 1e+238, 1e+239,
119		1e+240, 1e+241, 1e+242, 1e+243, 1e+244, 1e+245, 1e+246, 1e+247, 1e+248, 1e+249,
120		1e+250, 1e+251, 1e+252, 1e+253, 1e+254, 1e+255, 1e+256, 1e+257, 1e+258, 1e+259,
121		1e+260, 1e+261, 1e+262, 1e+263, 1e+264, 1e+265, 1e+266, 1e+267, 1e+268, 1e+269,
122		1e+270, 1e+271, 1e+272, 1e+273, 1e+274, 1e+275, 1e+276, 1e+277, 1e+278, 1e+279,
123		1e+280, 1e+281, 1e+282, 1e+283, 1e+284, 1e+285, 1e+286, 1e+287, 1e+288, 1e+289,
124		1e+290, 1e+291, 1e+292, 1e+293, 1e+294, 1e+295, 1e+296, 1e+297, 1e+298, 1e+299,
125
126		1e+300, 1e+301, 1e+302, 1e+303, 1e+304, 1e+305, 1e+306, 1e+307, 1e+308 };
127
128	1033693x	if( exp > 308 )
129		{
130	341x	return std::numeric_limits<double>::infinity();
131		}
132	1033352x	else if( exp < -308 )
133		{
134		// due to the way pow10 is used by dec_to_float,
135		// we can afford to return 0.0 here
136	151x	return 0.0;
137		}
138		else
139		{
140	1033201x	exp += 308;
141	1033201x	BOOST_ASSERT(exp >= 0 && exp < 618);
142	1033201x	return tab[exp];
143		}
144		}
145
146		inline
147		double
148	1033693x	dec_to_float(
149		std::uint64_t m,
150		std::int32_t e,
151		bool neg) noexcept
152		{
153		// convert to double explicitly to silence warnings
154	1033693x	double x = static_cast<double>(m);
155	1033693x	if(neg)
156	13164x	x = -x;
157
158	1033693x	if(e < -305)
159		{
160	5187x	x *= 1e-305 ;
161	5187x	e += 305;
162		}
163
164	1033693x	if(e >= -22 && e < 0)
165	54813x	return x / pow10(-e);
166
167	978880x	return x * pow10(e);
168		}
169
170		inline
171		bool
172		is_control(char c) noexcept
173		{
174		return static_cast<unsigned char>(c) < 32;
175		}
176
177		inline
178		int
179	66931x	hex_digit(unsigned char c) noexcept
180		{
181		// by Peter Dimov
182	66931x	if( c >= '0' && c <= '9' )
183	35759x	return c - '0';
184	31172x	c &= ~0x20;
185	31172x	if( c >= 'A' && c <= 'F' )
186	30562x	return 10 + c - 'A';
187	610x	return -1;
188		}
189
190		} // detail
191
192		//----------------------------------------------------------
193
194		template< class Handler >
195		template< bool StackEmpty_, char First_ >
196		struct basic_parser<Handler>::
197		parse_number_helper
198		{
199		basic_parser* parser;
200		char const* p;
201
202		template< std::size_t N >
203		char const*
204	2126871x	operator()( mp11::mp_size_t<N> ) const
205		{
206	4248301x	return parser->parse_number(
207	2126871x	p,
208		std::integral_constant<bool, StackEmpty_>(),
209		std::integral_constant<char, First_>(),
210		std::integral_constant<
211	2121431x	number_precision, static_cast<number_precision>(N)>() );
212		}
213		};
214
215		//----------------------------------------------------------
216
217		template<class Handler>
218		void
219	210519x	basic_parser<Handler>::
220		reserve()
221		{
222	210519x	if(BOOST_JSON_LIKELY(
223		! st_.empty()))
224	37444x	return;
225		// Reserve the largest stack we need,
226		// to avoid reallocation during suspend.
227	346150x	st_.reserve(
228		sizeof(state) + // document parsing state
229		(sizeof(state) +
230	173075x	sizeof(std::size_t)) * depth() + // array and object state + size
231		sizeof(state) + // value parsing state
232		sizeof(std::size_t) + // string size
233		sizeof(state)); // comment state
234		}
235
236		//----------------------------------------------------------
237		//
238		// The sentinel value is returned by parse functions
239		// to indicate that the parser failed, or suspended.
240		// this is used as it is distinct from all valid values
241		// for data in write
242
243		template<class Handler>
244		const char*
245	5340863x	basic_parser<Handler>::
246		sentinel()
247		{
248		// the "+1" ensures that the returned pointer is unique even if
249		// the given input buffer borders on this object
250		return reinterpret_cast<
251	5340863x	const char*>(this) + 1;
252		}
253
254		template<class Handler>
255		bool
256	2459821x	basic_parser<Handler>::
257		incomplete(
258		const detail::const_stream_wrapper& cs)
259		{
260	2459821x	return cs.begin() == sentinel();
261		}
262
263		//----------------------------------------------------------
264		//
265		// These functions are declared with the BOOST_NOINLINE
266		// attribute to avoid polluting the parsers hot-path.
267		// They return the canary value to indicate suspension
268		// or failure.
269
270		template<class Handler>
271		const char*
272		basic_parser<Handler>::
273		suspend_or_fail(state st)
274		{
275		if(BOOST_JSON_LIKELY(
276		! ec_ && more_))
277		{
278		// suspend
279		reserve();
280		st_.push_unchecked(st);
281		}
282		return sentinel();
283		}
284
285		template<class Handler>
286		const char*
287	56150x	basic_parser<Handler>::
288		suspend_or_fail(
289		state st,
290		std::size_t n)
291		{
292	56150x	if(BOOST_JSON_LIKELY(
293		! ec_ && more_))
294		{
295		// suspend
296	35836x	reserve();
297	35836x	st_.push_unchecked(n);
298	35836x	st_.push_unchecked(st);
299		}
300	56150x	return sentinel();
301		}
302
303
304		template<class Handler>
305		const char*
306	19005x	basic_parser<Handler>::
307		fail(const char* p) noexcept
308		{
309	19005x	BOOST_ASSERT( p != sentinel() );
310	19005x	end_ = p;
311	19005x	return sentinel();
312		}
313
314		template<class Handler>
315		const char*
316	7772x	basic_parser<Handler>::
317		fail(
318		const char* p,
319		error ev,
320		source_location const* loc) noexcept
321		{
322	7772x	BOOST_ASSERT( p != sentinel() );
323	7772x	end_ = p;
324	7772x	ec_.assign(ev, loc);
325	7772x	return sentinel();
326		}
327
328		template<class Handler>
329		const char*
330	11289x	basic_parser<Handler>::
331		maybe_suspend(
332		const char* p,
333		state st)
334		{
335	11289x	if( p != sentinel() )
336	9424x	end_ = p;
337	11289x	if(BOOST_JSON_LIKELY(more_))
338		{
339		// suspend
340	11027x	reserve();
341	11027x	st_.push_unchecked(st);
342		}
343	11289x	return sentinel();
344		}
345
346		template<class Handler>
347		const char*
348	38223x	basic_parser<Handler>::
349		maybe_suspend(
350		const char* p,
351		state st,
352		std::size_t n)
353		{
354	38223x	BOOST_ASSERT( p != sentinel() );
355	38223x	end_ = p;
356	38223x	if(BOOST_JSON_LIKELY(more_))
357		{
358		// suspend
359	37823x	reserve();
360	37823x	st_.push_unchecked(n);
361	37823x	st_.push_unchecked(st);
362		}
363	38223x	return sentinel();
364		}
365
366		template<class Handler>
367		const char*
368	1123x	basic_parser<Handler>::
369		maybe_suspend(
370		const char* p,
371		state st,
372		const number& num)
373		{
374	1123x	BOOST_ASSERT( p != sentinel() );
375	1123x	end_ = p;
376	1123x	if(BOOST_JSON_LIKELY(more_))
377		{
378		// suspend
379	1123x	num_ = num;
380	1123x	reserve();
381	1123x	st_.push_unchecked(st);;
382		}
383	1123x	return sentinel();
384		}
385
386		template<class Handler>
387		const char*
388	88656x	basic_parser<Handler>::
389		suspend(
390		const char* p,
391		state st)
392		{
393	88656x	BOOST_ASSERT( p != sentinel() );
394	88656x	end_ = p;
395		// suspend
396	88656x	reserve();
397	88656x	st_.push_unchecked(st);
398	88656x	return sentinel();
399		}
400
401		template<class Handler>
402		const char*
403	36054x	basic_parser<Handler>::
404		suspend(
405		const char* p,
406		state st,
407		const number& num)
408		{
409	36054x	BOOST_ASSERT( p != sentinel() );
410	36054x	end_ = p;
411		// suspend
412	36054x	num_ = num;
413	36054x	reserve();
414	36054x	st_.push_unchecked(st);
415	36054x	return sentinel();
416		}
417
418		template<class Handler>
419		template<
420		bool StackEmpty_/*,
421		bool Terminal_*/>
422		const char*
423	21737x	basic_parser<Handler>::
424		parse_comment(const char* p,
425		std::integral_constant<bool, StackEmpty_> stack_empty,
426		/std::integral_constant<bool, Terminal_>/ bool terminal)
427		{
428	21737x	detail::const_stream_wrapper cs(p, end_);
429	21737x	const char* start = cs.begin();
430		std::size_t remain;
431	21737x	if(! stack_empty && ! st_.empty())
432		{
433		state st;
434	3507x	st_.pop(st);
435	3507x	switch(st)
436		{
437	✗	default: BOOST_JSON_UNREACHABLE();
438	534x	case state::com1: goto do_com1;
439	2319x	case state::com2: goto do_com2;
440	438x	case state::com3: goto do_com3;
441	216x	case state::com4: goto do_com4;
442		}
443		}
444	18230x	BOOST_ASSERT(*cs == '/');
445	18230x	++cs;
446	18764x	do_com1:
447	18764x	if(BOOST_JSON_UNLIKELY(! cs))
448	551x	return maybe_suspend(cs.begin(), state::com1);
449	18213x	switch(*cs)
450		{
451	5x	default:
452		{
453		BOOST_STATIC_CONSTEXPR source_location loc
454		= BOOST_CURRENT_LOCATION;
455	5x	return fail(cs.begin(), error::syntax, &loc);
456		}
457	10524x	case '/':
458	10524x	++cs;
459	12843x	do_com2:
460		// KRYSTIAN TODO: this is a mess, we have to fix this
461	12843x	remain = cs.remain();
462	25686x	cs = remain ? static_cast<const char*>(
463	12843x	std::memchr(cs.begin(), '\n', remain)) : sentinel();
464	12843x	if(! cs.begin())
465	2143x	cs = sentinel();
466	12843x	if(BOOST_JSON_UNLIKELY(incomplete(cs)))
467		{
468		// if the doc does not terminate
469		// with a newline, treat it as the
470		// end of the comment
471	2568x	if(terminal && ! more_)
472		{
473	39x	if(BOOST_JSON_UNLIKELY(! h_.on_comment(
474		{start, cs.remain(start)}, ec_)))
475	2x	return fail(cs.end());
476	35x	return cs.end();
477		}
478	2529x	if(BOOST_JSON_UNLIKELY(! h_.on_comment_part(
479		{start, cs.remain(start)}, ec_)))
480	95x	return fail(cs.end());
481	2339x	if(terminal)
482	106x	return suspend(cs.end(), state::com2);
483	2233x	return maybe_suspend(cs.end(), state::com2);
484		}
485	10275x	break;
486	1684x	case '*':
487		do
488		{
489	9368x	++cs;
490	9806x	do_com3:
491		// KRYSTIAN TODO: this is a mess, we have to fix this
492	9806x	remain = cs.remain();
493	19612x	cs = remain ? static_cast<const char*>(
494	9806x	std::memchr(cs.begin(), '*', remain)) : sentinel();
495	9806x	if(! cs.begin())
496	242x	cs = sentinel();
497		// stopped inside a c comment
498	9806x	if(BOOST_JSON_UNLIKELY(incomplete(cs)))
499		{
500	503x	if(BOOST_JSON_UNLIKELY(! h_.on_comment_part(
501		{start, cs.remain(start)}, ec_)))
502	30x	return fail(cs.end());
503	443x	return maybe_suspend(cs.end(), state::com3);
504		}
505		// found a asterisk, check if the next char is a slash
506	9303x	++cs;
507	9519x	do_com4:
508	9519x	if(BOOST_JSON_UNLIKELY(! cs))
509		{
510	259x	if(BOOST_JSON_UNLIKELY(! h_.on_comment_part(
511		{start, cs.used(start)}, ec_)))
512	18x	return fail(cs.begin());
513	223x	return maybe_suspend(cs.begin(), state::com4);
514		}
515		}
516	9260x	while(*cs != '/');
517		}
518	17851x	++cs;
519	17851x	if(BOOST_JSON_UNLIKELY(! h_.on_comment(
520		{start, cs.used(start)}, ec_)))
521	964x	return fail(cs.begin());
522	15923x	return cs.begin();
523		}
524
525		template<class Handler>
526		template<bool StackEmpty_>
527		const char*
528	2318407x	basic_parser<Handler>::
529		parse_document(const char* p,
530		std::integral_constant<bool, StackEmpty_> stack_empty)
531		{
532	2318407x	detail::const_stream_wrapper cs(p, end_);
533	2318407x	if(! stack_empty && ! st_.empty())
534		{
535		state st;
536	169596x	st_.peek(st);
537	169596x	switch(st)
538		{
539	83532x	default: goto do_doc2;
540	601x	case state::doc1:
541	601x	st_.pop(st);
542	601x	goto do_doc1;
543	85243x	case state::doc3:
544	85243x	st_.pop(st);
545	85243x	goto do_doc3;
546	220x	case state::com1: case state::com2:
547		case state::com3: case state::com4:
548	220x	goto do_doc4;
549		}
550		}
551	2148811x	do_doc1:
552	2149412x	cs = detail::count_whitespace(cs.begin(), cs.end());
553	2149412x	if(BOOST_JSON_UNLIKELY(! cs))
554	633x	return maybe_suspend(cs.begin(), state::doc1);
555	2148779x	do_doc2:
556	2232311x	switch(+opt_.allow_comments \|
557	2232311x	(opt_.allow_trailing_commas << 1) \|
558	2232311x	(opt_.allow_invalid_utf8 << 2))
559		{
560		// no extensions
561	2208646x	default:
562	2208646x	cs = parse_value(cs.begin(), stack_empty, std::false_type(), std::false_type(), std::false_type(), opt_.allow_invalid_utf16);
563	2193488x	break;
564		// comments
565	13534x	case 1:
566	13534x	cs = parse_value(cs.begin(), stack_empty, std::true_type(), std::false_type(), std::false_type(), opt_.allow_invalid_utf16);
567	11271x	break;
568		// trailing
569	6710x	case 2:
570	6710x	cs = parse_value(cs.begin(), stack_empty, std::false_type(), std::true_type(), std::false_type(), opt_.allow_invalid_utf16);
571	5117x	break;
572		// comments & trailing
573	761x	case 3:
574	761x	cs = parse_value(cs.begin(), stack_empty, std::true_type(), std::true_type(), std::false_type(), opt_.allow_invalid_utf16);
575	761x	break;
576		// skip validation
577	760x	case 4:
578	760x	cs = parse_value(cs.begin(), stack_empty, std::false_type(), std::false_type(), std::true_type(), opt_.allow_invalid_utf16);
579	760x	break;
580		// comments & skip validation
581	760x	case 5:
582	760x	cs = parse_value(cs.begin(), stack_empty, std::true_type(), std::false_type(), std::true_type(), opt_.allow_invalid_utf16);
583	760x	break;
584		// trailing & skip validation
585	760x	case 6:
586	760x	cs = parse_value(cs.begin(), stack_empty, std::false_type(), std::true_type(), std::true_type(), opt_.allow_invalid_utf16);
587	760x	break;
588		// comments & trailing & skip validation
589	380x	case 7:
590	380x	cs = parse_value(cs.begin(), stack_empty, std::true_type(), std::true_type(), std::true_type(), opt_.allow_invalid_utf16);
591	380x	break;
592		}
593	2213297x	if(BOOST_JSON_UNLIKELY(incomplete(cs)))
594		// the appropriate state has already been pushed into stack
595	110735x	return sentinel();
596	2102562x	do_doc3:
597	2188137x	cs = detail::count_whitespace(cs.begin(), cs.end());
598	2188137x	if(BOOST_JSON_UNLIKELY(! cs))
599		{
600	2185539x	if(more_)
601	88550x	return suspend(cs.begin(), state::doc3);
602		}
603	2598x	else if(opt_.allow_comments && *cs == '/')
604		{
605	536x	do_doc4:
606	756x	cs = parse_comment(cs.begin(), stack_empty, std::true_type());
607	671x	if(BOOST_JSON_UNLIKELY(incomplete(cs)))
608	339x	return sentinel();
609	332x	goto do_doc3;
610		}
611	2099051x	return cs.begin();
612		}
613
614		template<class Handler>
615		template<
616		bool StackEmpty_,
617		bool AllowComments_/*,
618		bool AllowTrailing_,
619		bool AllowBadUTF8_*/>
620		const char*
621	2349922x	basic_parser<Handler>::
622		parse_value(const char* p,
623		std::integral_constant<bool, StackEmpty_> stack_empty,
624		std::integral_constant<bool, AllowComments_> allow_comments,
625		/std::integral_constant<bool, AllowTrailing_>/ bool allow_trailing,
626		/std::integral_constant<bool, AllowBadUTF8_>/ bool allow_bad_utf8,
627		bool allow_bad_utf16)
628		{
629	2349922x	if(stack_empty \|\| st_.empty())
630		{
631	2248022x	loop:
632	2252938x	switch(*p)
633		{
634	22753x	case '0':
635	22753x	return mp11::mp_with_index<3>(
636	22753x	static_cast<unsigned char>(opt_.numbers),
637	22092x	parse_number_helper<true, '0'>{ this, p });
638	25178x	case '-':
639	25178x	return mp11::mp_with_index<3>(
640	25178x	static_cast<unsigned char>(opt_.numbers),
641	24066x	parse_number_helper<true, '-'>{ this, p });
642	2041766x	case '1': case '2': case '3':
643		case '4': case '5': case '6':
644		case '7': case '8': case '9':
645	2041766x	return mp11::mp_with_index<3>(
646	2041766x	static_cast<unsigned char>(opt_.numbers),
647	2038922x	parse_number_helper<true, '+'>{ this, p });
648	11379x	case 'n':
649	11379x	return parse_literal( p, detail::literals_c<detail::literals::null>() );
650	664x	case 't':
651	664x	return parse_literal( p, detail::literals_c<detail::literals::true_>() );
652	722x	case 'f':
653	722x	return parse_literal( p, detail::literals_c<detail::literals::false_>() );
654	681x	case 'I':
655	681x	if( !opt_.allow_infinity_and_nan )
656		{
657		BOOST_STATIC_CONSTEXPR source_location loc
658		= BOOST_CURRENT_LOCATION;
659	24x	return fail(p, error::syntax, &loc);
660		}
661	657x	return parse_literal( p, detail::literals_c<detail::literals::infinity>() );
662	231x	case 'N':
663	231x	if( !opt_.allow_infinity_and_nan )
664		{
665		BOOST_STATIC_CONSTEXPR source_location loc
666		= BOOST_CURRENT_LOCATION;
667	30x	return fail(p, error::syntax, &loc);
668		}
669	201x	return parse_literal(p, detail::literals_c<detail::literals::nan>() );
670	47576x	case '"':
671	47576x	return parse_string(p, std::true_type(), std::false_type(), allow_bad_utf8, allow_bad_utf16);
672	20618x	case '[':
673	20618x	return parse_array(p, std::true_type(), allow_comments, allow_trailing, allow_bad_utf8, allow_bad_utf16);
674	74128x	case '{':
675	74128x	return parse_object(p, std::true_type(), allow_comments, allow_trailing, allow_bad_utf8, allow_bad_utf16);
676	6125x	case '/':
677	6125x	if(! allow_comments)
678		{
679		BOOST_STATIC_CONSTEXPR source_location loc
680		= BOOST_CURRENT_LOCATION;
681	284x	return fail(p, error::syntax, &loc);
682		}
683	5841x	p = parse_comment(p, stack_empty, std::false_type());
684		// KRYSTIAN NOTE: incomplete takes const_stream, we either
685		// can add an overload, change the existing one to take a pointer,
686		// or just leave it as is
687	5605x	if(BOOST_JSON_UNLIKELY(p == sentinel()))
688	591x	return maybe_suspend(p, state::val2);
689		BOOST_FALLTHROUGH;
690		case ' ':
691		case '\t':
692		case '\n':
693		case '\r':
694	5026x	p = detail::count_whitespace(p, end_);
695	5026x	if(BOOST_JSON_UNLIKELY(p == end_))
696	110x	return maybe_suspend(p, state::val1);
697	4916x	goto loop;
698	1105x	default:
699		{
700		BOOST_STATIC_CONSTEXPR source_location loc
701		= BOOST_CURRENT_LOCATION;
702	1105x	return fail(p, error::syntax, &loc);
703		}
704		}
705		}
706	101900x	return resume_value(p, allow_comments, allow_trailing, allow_bad_utf8, allow_bad_utf16);
707		}
708
709		template<class Handler>
710		template<
711		bool AllowComments_/*,
712		bool AllowTrailing_,
713		bool AllowBadUTF8_*/>
714		const char*
715	101900x	basic_parser<Handler>::
716		resume_value(const char* p,
717		std::integral_constant<bool, AllowComments_> allow_comments,
718		/std::integral_constant<bool, AllowTrailing_>/ bool allow_trailing,
719		/std::integral_constant<bool, AllowBadUTF8_>/ bool allow_bad_utf8,
720		bool allow_bad_utf16)
721		{
722		state st;
723	101900x	st_.peek(st);
724	101900x	switch(st)
725		{
726	✗	default: BOOST_JSON_UNREACHABLE();
727	1924x	case state::lit1:
728	1924x	return parse_literal(p, detail::literals_c<detail::literals::resume>() );
729
730	20256x	case state::str1: case state::str2:
731		case state::str8:
732	20256x	return parse_string(p, std::false_type(), std::false_type(), allow_bad_utf8, allow_bad_utf16);
733
734	5716x	case state::arr1: case state::arr2:
735		case state::arr3: case state::arr4:
736		case state::arr5: case state::arr6:
737	5716x	return parse_array(p, std::false_type(), allow_comments, allow_trailing, allow_bad_utf8, allow_bad_utf16);
738
739	35047x	case state::obj1: case state::obj2:
740		case state::obj3: case state::obj4:
741		case state::obj5: case state::obj6:
742		case state::obj7: case state::obj8:
743		case state::obj9: case state::obj10:
744		case state::obj11:
745	35047x	return parse_object(p, std::false_type(), allow_comments, allow_trailing, allow_bad_utf8, allow_bad_utf16);
746
747	37174x	case state::num1: case state::num2:
748		case state::num3: case state::num4:
749		case state::num5: case state::num6:
750		case state::num7: case state::num8:
751		case state::exp1: case state::exp2:
752		case state::exp3:
753	37174x	return mp11::mp_with_index<3>(
754	37174x	static_cast<unsigned char>(opt_.numbers),
755	36351x	parse_number_helper<false, 0>{ this, p });
756
757		// KRYSTIAN NOTE: these are special cases
758	108x	case state::val1:
759		{
760	108x	st_.pop(st);
761	108x	BOOST_ASSERT(st_.empty());
762	108x	p = detail::count_whitespace(p, end_);
763	108x	if(BOOST_JSON_UNLIKELY(p == end_))
764	✗	return maybe_suspend(p, state::val1);
765	108x	return parse_value(p, std::true_type(), allow_comments, allow_trailing, allow_bad_utf8, allow_bad_utf16);
766		}
767
768	1608x	case state::val2:
769		{
770	1608x	st_.pop(st);
771	1608x	p = parse_comment(p, std::false_type(), std::false_type());
772	1590x	if(BOOST_JSON_UNLIKELY(p == sentinel()))
773	1274x	return maybe_suspend(p, state::val2);
774	316x	if(BOOST_JSON_UNLIKELY( p == end_ ))
775	77x	return maybe_suspend(p, state::val3);
776	239x	BOOST_ASSERT(st_.empty());
777	239x	return parse_value(p, std::true_type(), std::true_type(), allow_trailing, allow_bad_utf8, allow_bad_utf16);
778		}
779
780	67x	case state::val3:
781		{
782	67x	st_.pop(st);
783	67x	return parse_value(p, std::true_type(), std::true_type(), allow_trailing, allow_bad_utf8, allow_bad_utf16);
784		}
785		}
786		}
787
788		template<class Handler>
789		template<class Literal>
790		const char*
791	16563x	basic_parser<Handler>::
792		parse_literal(const char* p, Literal)
793		{
794		using L = detail::literals;
795
796		std::size_t cur_lit;
797		std::size_t offset;
798
799	16563x	detail::const_stream_wrapper cs(p, end_);
800		BOOST_IF_CONSTEXPR( Literal::value != L::resume )
801		{
802	13632x	constexpr std::size_t index = literal_index(Literal::value);
803	13632x	constexpr char const* literal = detail::literal_strings[index];
804	13632x	constexpr std::size_t sz = detail::literal_sizes[index];
805
806	13632x	if(BOOST_JSON_LIKELY( cs.remain() >= sz ))
807		{
808	11982x	int const cmp = std::memcmp(cs.begin(), literal, sz);
809	11982x	if( cmp != 0 )
810		{
811		BOOST_STATIC_CONSTEXPR source_location loc = BOOST_CURRENT_LOCATION;
812	197x	return fail(cs.begin(), error::syntax, &loc);
813		}
814
815		BOOST_IF_CONSTEXPR( Literal::value == L::null )
816		{
817	10787x	if(BOOST_JSON_UNLIKELY(
818		! h_.on_null(ec_)))
819	161x	return fail(cs.begin());
820		}
821		else BOOST_IF_CONSTEXPR( Literal::value == L::true_ )
822		{
823	384x	if(BOOST_JSON_UNLIKELY(
824		! h_.on_bool(true, ec_)))
825	14x	return fail(cs.begin());
826		}
827		else BOOST_IF_CONSTEXPR( Literal::value == L::false_ )
828		{
829	406x	if(BOOST_JSON_UNLIKELY(
830		! h_.on_bool(false, ec_)))
831	13x	return fail(cs.begin());
832		}
833		else BOOST_IF_CONSTEXPR( Literal::value == L::infinity )
834		{
835	103x	if(BOOST_JSON_UNLIKELY(
836		! h_.on_double(
837		std::numeric_limits<double>::infinity(),
838		string_view(literal, sz),
839		ec_)))
840	13x	return fail(cs.begin());
841		}
842		else BOOST_IF_CONSTEXPR( Literal::value == L::neg_infinity )
843		{
844	9x	if(BOOST_JSON_UNLIKELY(
845		! h_.on_double(
846		-std::numeric_limits<double>::infinity(),
847		string_view(literal, sz),
848		ec_)))
849	1x	return fail(cs.begin());
850		}
851		else BOOST_IF_CONSTEXPR( Literal::value == L::nan )
852		{
853	96x	if(BOOST_JSON_UNLIKELY(
854		! h_.on_double(
855		std::numeric_limits<double>::quiet_NaN(),
856		string_view(literal, sz),
857		ec_)))
858	12x	return fail(cs.begin());
859		}
860		else
861		{
862		BOOST_JSON_UNREACHABLE();
863		}
864
865	11361x	cs += sz;
866	11361x	return cs.begin();
867		}
868
869	1650x	offset = 0;
870	1650x	cur_lit = index;
871		}
872		else
873		{
874		state st;
875	2931x	st_.pop(st);
876	2931x	BOOST_ASSERT( st == state::lit1 );
877
878	2931x	cur_lit = cur_lit_;
879	2931x	offset = lit_offset_;
880		}
881
882	4581x	std::size_t const lit_size = detail::literal_sizes[cur_lit];
883	4581x	std::size_t const size = (std::min)( lit_size - offset, cs.remain() );
884	4581x	int cmp = 0;
885	4581x	if(BOOST_JSON_LIKELY( cs.begin() ))
886	4580x	cmp = std::memcmp(
887	4580x	cs.begin(), detail::literal_strings[cur_lit] + offset, size );
888	4581x	if( cmp != 0 )
889		{
890		BOOST_STATIC_CONSTEXPR source_location loc = BOOST_CURRENT_LOCATION;
891	699x	return fail(cs.begin(), error::syntax, &loc);
892		}
893
894	3882x	if(BOOST_JSON_UNLIKELY( offset + size < lit_size ))
895		{
896	1990x	BOOST_ASSERT( cur_lit < 256 );
897	1990x	cur_lit_ = static_cast<unsigned char>( cur_lit );
898	1990x	BOOST_ASSERT( offset + size < 256 );
899	1990x	lit_offset_ = static_cast<unsigned char>( offset + size );
900	1990x	return maybe_suspend(cs.begin() + size, state::lit1);
901		}
902
903	1892x	switch( static_cast<L>(cur_lit) )
904		{
905	472x	case L::null:
906	472x	if(BOOST_JSON_UNLIKELY(
907		! h_.on_null(ec_)))
908	61x	return fail(cs.begin());
909	351x	break;
910	152x	case L::true_:
911	152x	if(BOOST_JSON_UNLIKELY(
912		! h_.on_bool(true, ec_)))
913	22x	return fail(cs.begin());
914	109x	break;
915	198x	case L::false_:
916	198x	if(BOOST_JSON_UNLIKELY(
917		! h_.on_bool(false, ec_)))
918	28x	return fail(cs.begin());
919	142x	break;
920	308x	case L::infinity:
921	308x	if(BOOST_JSON_UNLIKELY(
922		! h_.on_double(
923		std::numeric_limits<double>::infinity(),
924		string_view(
925		detail::literal_strings[ literal_index(L::infinity) ],
926		detail::literal_sizes[ literal_index(L::infinity) ]),
927		ec_)))
928	49x	return fail(cs.begin());
929	210x	break;
930	686x	case L::neg_infinity:
931	686x	if(BOOST_JSON_UNLIKELY(
932		! h_.on_double(
933		-std::numeric_limits<double>::infinity(),
934		string_view(
935		detail::literal_strings[ literal_index(L::neg_infinity) ],
936		detail::literal_sizes[ literal_index(L::neg_infinity) ]),
937		ec_)))
938	102x	return fail(cs.begin());
939	482x	break;
940	76x	case L::nan:
941	76x	if(BOOST_JSON_UNLIKELY(
942		! h_.on_double(
943		std::numeric_limits<double>::quiet_NaN(),
944		string_view(
945		detail::literal_strings[ literal_index(L::nan) ],
946		detail::literal_sizes[ literal_index(L::nan) ]),
947		ec_)))
948	12x	return fail(cs.begin());
949	52x	break;
950	✗	default: BOOST_JSON_UNREACHABLE();
951		}
952
953	1346x	cs += size;
954	1346x	return cs.begin();
955		}
956
957		//----------------------------------------------------------
958
959		template<class Handler>
960		template<bool StackEmpty_, bool IsKey_>
961		const char*
962	161297x	basic_parser<Handler>::
963		parse_string(const char* p,
964		std::integral_constant<bool, StackEmpty_> stack_empty,
965		std::integral_constant<bool, IsKey_> is_key,
966		bool allow_bad_utf8,
967		bool allow_bad_utf16)
968		{
969	161297x	detail::const_stream_wrapper cs(p, end_);
970		std::size_t total;
971		char const* start;
972		std::size_t size;
973	161297x	if(! stack_empty && ! st_.empty())
974		{
975		state st;
976	32896x	st_.pop(st);
977	32896x	st_.pop(total);
978	32896x	switch(st)
979		{
980	✗	default: BOOST_JSON_UNREACHABLE();
981	3149x	case state::str2: goto do_str2;
982	1861x	case state::str8: goto do_str8;
983	27886x	case state::str1: break;
984		}
985		}
986		else
987		{
988	128401x	BOOST_ASSERT(*cs == '\x22'); // '"'
989	128401x	++cs;
990	128401x	total = 0;
991		}
992
993	164779x	do_str1:
994	164779x	start = cs.begin();
995	329558x	cs = allow_bad_utf8?
996	2177x	detail::count_valid<true>(cs.begin(), cs.end()):
997	162602x	detail::count_valid<false>(cs.begin(), cs.end());
998	164779x	size = cs.used(start);
999	164779x	if(is_key)
1000		{
1001	46685x	BOOST_ASSERT(total <= Handler::max_key_size);
1002	93996x	if(BOOST_JSON_UNLIKELY(size >
1003		Handler::max_key_size - total))
1004		{
1005		BOOST_STATIC_CONSTEXPR source_location loc
1006		= BOOST_CURRENT_LOCATION;
1007	3x	return fail(cs.begin(), error::key_too_large, &loc);
1008		}
1009		}
1010		else
1011		{
1012	35321x	BOOST_ASSERT(total <= Handler::max_string_size);
1013	70783x	if(BOOST_JSON_UNLIKELY(size >
1014		Handler::max_string_size - total))
1015		{
1016		BOOST_STATIC_CONSTEXPR source_location loc
1017		= BOOST_CURRENT_LOCATION;
1018	3x	return fail(cs.begin(), error::string_too_large, &loc);
1019		}
1020		}
1021	164773x	total += size;
1022	164773x	if(BOOST_JSON_UNLIKELY(! cs))
1023		{
1024		// call handler if the string isn't empty
1025	30220x	if(BOOST_JSON_LIKELY(size))
1026		{
1027		{
1028	27063x	bool r = is_key?
1029	12402x	h_.on_key_part( {start, size}, total, ec_ ):
1030	15995x	h_.on_string_part( {start, size}, total, ec_ );
1031
1032	25955x	if(BOOST_JSON_UNLIKELY(!r))
1033		{
1034	1110x	return fail(cs.begin());
1035		}
1036		}
1037		}
1038	28002x	return maybe_suspend(cs.begin(), state::str1, total);
1039		}
1040		// at this point all valid characters have been skipped, so any remaining
1041		// if there are any more characters, they are either escaped, or incomplete
1042		// utf8, or invalid utf8
1043	134553x	if(BOOST_JSON_UNLIKELY(*cs != '\x22')) // '"'
1044		{
1045		// sequence is invalid or incomplete
1046	15068x	if((*cs & 0x80) && !allow_bad_utf8)
1047		{
1048	3462x	seq_.save(cs.begin(), cs.remain());
1049	3462x	if(BOOST_JSON_UNLIKELY(seq_.complete()))
1050		{
1051		BOOST_STATIC_CONSTEXPR source_location loc
1052		= BOOST_CURRENT_LOCATION;
1053	1557x	return fail(cs.begin(), error::syntax, &loc);
1054		}
1055	1905x	if(BOOST_JSON_LIKELY(size))
1056		{
1057	245x	bool const r = is_key?
1058	22x	h_.on_key_part( {start, size}, total, ec_ ):
1059	245x	h_.on_string_part( {start, size}, total, ec_ );
1060	223x	if(BOOST_JSON_UNLIKELY( !r ))
1061	22x	return fail( cs.begin() );
1062		}
1063	1861x	return maybe_suspend(cs.end(), state::str8, total);
1064		}
1065	11606x	else if(BOOST_JSON_LIKELY(*cs == '\\'))
1066		{
1067		// flush unescaped run from input
1068	11497x	if(BOOST_JSON_LIKELY(size))
1069		{
1070	4250x	bool const r = is_key?
1071	1226x	h_.on_key_part( {start, size}, total, ec_ ):
1072	3554x	h_.on_string_part( {start, size}, total, ec_ );
1073	3766x	if(BOOST_JSON_UNLIKELY( !r ))
1074	484x	return fail( cs.begin() );
1075		}
1076	7247x	do_str2:
1077	13678x	cs = parse_escaped(cs.begin(), total, stack_empty, is_key, allow_bad_utf16);
1078	12716x	if(BOOST_JSON_UNLIKELY( incomplete(cs) ))
1079	5473x	return suspend_or_fail(state::str2, total);
1080
1081	7243x	goto do_str1;
1082		}
1083		// illegal control
1084		BOOST_STATIC_CONSTEXPR source_location loc = BOOST_CURRENT_LOCATION;
1085	109x	return fail(cs.begin(), error::syntax, &loc);
1086		}
1087
1088		{
1089	119485x	bool r = is_key?
1090	84509x	h_.on_key( {start, size}, total, ec_ ):
1091	41985x	h_.on_string( {start, size}, total, ec_ );
1092
1093	115111x	if(BOOST_JSON_UNLIKELY(!r))
1094		{
1095	4318x	return fail(cs.begin());
1096		}
1097		}
1098
1099	110793x	++cs;
1100	110793x	return cs.begin();
1101
1102	1861x	do_str8:
1103	1861x	uint8_t needed = seq_.needed();
1104	1861x	if(BOOST_JSON_UNLIKELY( !seq_.append(cs.begin(), cs.remain()) ))
1105	✗	return maybe_suspend(cs.end(), state::str8, total);
1106	1861x	if(BOOST_JSON_UNLIKELY( !seq_.valid() ))
1107		{
1108		BOOST_STATIC_CONSTEXPR source_location loc = BOOST_CURRENT_LOCATION;
1109	210x	return fail(cs.begin(), error::syntax, &loc);
1110		}
1111		{
1112	1651x	bool const r = is_key?
1113	201x	h_.on_key_part( {seq_.data(), seq_.length()}, total, ec_ ):
1114	1651x	h_.on_string_part( {seq_.data(), seq_.length()}, total, ec_ );
1115	1450x	if(BOOST_JSON_UNLIKELY( !r ))
1116	201x	return fail( cs.begin() );
1117		}
1118	1249x	cs += needed;
1119	1249x	goto do_str1;
1120		}
1121
1122		template<class Handler>
1123		template<bool StackEmpty_>
1124		const char*
1125	13678x	basic_parser<Handler>::
1126		parse_escaped(
1127		const char* p,
1128		std::size_t& total,
1129		std::integral_constant<bool, StackEmpty_> stack_empty,
1130		bool is_key,
1131		bool allow_bad_utf16)
1132		{
1133	13678x	constexpr unsigned urc = 0xFFFD; // Unicode replacement character
1134	13678x	auto const ev_too_large = is_key?
1135		error::key_too_large : error::string_too_large;
1136	13678x	auto const max_size = is_key?
1137		Handler::max_key_size : Handler::max_string_size;
1138		int digit;
1139
1140		//---------------------------------------------------------------
1141		//
1142		// To handle escapes, a local temporary buffer accumulates
1143		// the unescaped result. The algorithm attempts to fill the
1144		// buffer to capacity before invoking the handler.
1145		// In some cases the temporary buffer needs to be flushed
1146		// before it is full:
1147		// * When the closing double quote is seen
1148		// * When there in no more input (and more is expected later)
1149		// A goal of the algorithm is to call the handler as few times
1150		// as possible. Thus, when the first escape is encountered,
1151		// the algorithm attempts to fill the temporary buffer first.
1152		//
1153	13678x	detail::buffer<BOOST_JSON_STACK_BUFFER_SIZE> temp;
1154
1155		// Unescaped JSON is never larger than its escaped version.
1156		// To efficiently process only what will fit in the temporary buffer,
1157		// the size of the input stream is temporarily "clipped" to the size
1158		// of the temporary buffer.
1159		// handle escaped character
1160	13678x	detail::clipped_const_stream cs(p, end_);
1161	13678x	cs.clip(temp.max_size());
1162
1163	13678x	if(! stack_empty && ! st_.empty())
1164		{
1165		state st;
1166	3149x	st_.pop(st);
1167	3149x	switch(st)
1168		{
1169	✗	default: BOOST_JSON_UNREACHABLE();
1170	528x	case state::str3: goto do_str3;
1171	392x	case state::str4: goto do_str4;
1172	390x	case state::str5: goto do_str5;
1173	389x	case state::str6: goto do_str6;
1174	386x	case state::str7: goto do_str7;
1175	232x	case state::sur1: goto do_sur1;
1176	188x	case state::sur2: goto do_sur2;
1177	164x	case state::sur3: goto do_sur3;
1178	162x	case state::sur4: goto do_sur4;
1179	160x	case state::sur5: goto do_sur5;
1180	158x	case state::sur6: goto do_sur6;
1181		}
1182		}
1183
1184	3781x	while(true)
1185		{
1186	14310x	BOOST_ASSERT( temp.capacity() );
1187	14310x	BOOST_ASSERT(*cs == '\\');
1188	14310x	++cs;
1189	15169x	do_str3:
1190	15374x	if(BOOST_JSON_UNLIKELY(! cs))
1191		{
1192	561x	if(BOOST_JSON_LIKELY(! temp.empty()))
1193		{
1194	✗	BOOST_ASSERT(total <= max_size);
1195	100x	if(BOOST_JSON_UNLIKELY(
1196		temp.size() > max_size - total))
1197		{
1198		BOOST_STATIC_CONSTEXPR source_location loc
1199		= BOOST_CURRENT_LOCATION;
1200	✗	return fail(cs.begin(), ev_too_large, &loc);
1201		}
1202	100x	total += temp.size();
1203		{
1204	91x	bool r = is_key
1205	100x	? h_.on_key_part(temp.get(), total, ec_)
1206	100x	: h_.on_string_part(temp.get(), total, ec_);
1207
1208	91x	if(BOOST_JSON_UNLIKELY(!r))
1209		{
1210	9x	return fail(cs.begin());
1211		}
1212		}
1213	82x	temp.clear();
1214		}
1215	543x	cs.clip(temp.max_size());
1216	543x	if(BOOST_JSON_UNLIKELY(! cs))
1217	543x	return maybe_suspend(cs.begin(), state::str3);
1218		}
1219	14813x	switch(*cs)
1220		{
1221	191x	default:
1222		{
1223		BOOST_STATIC_CONSTEXPR source_location loc
1224		= BOOST_CURRENT_LOCATION;
1225	191x	return fail(cs.begin(), error::syntax, &loc);
1226		}
1227	265x	case '\x22': // '"'
1228	265x	temp.push_back('\x22');
1229	265x	++cs;
1230	265x	break;
1231	178x	case '\\':
1232	178x	temp.push_back('\\');
1233	178x	++cs;
1234	178x	break;
1235	96x	case '/':
1236	96x	temp.push_back('/');
1237	96x	++cs;
1238	96x	break;
1239	112x	case 'b':
1240	112x	temp.push_back('\x08');
1241	112x	++cs;
1242	112x	break;
1243	108x	case 'f':
1244	108x	temp.push_back('\x0c');
1245	108x	++cs;
1246	108x	break;
1247	1763x	case 'n':
1248	1763x	temp.push_back('\x0a');
1249	1763x	++cs;
1250	1763x	break;
1251	146x	case 'r':
1252	146x	temp.push_back('\x0d');
1253	146x	++cs;
1254	146x	break;
1255	266x	case 't':
1256	266x	temp.push_back('\x09');
1257	266x	++cs;
1258	266x	break;
1259	11688x	case 'u':
1260		// utf16 escape
1261		//
1262		// fast path only when the buffer
1263		// is large enough for 2 surrogates
1264	11688x	if(BOOST_JSON_LIKELY(cs.remain() > 10))
1265		{
1266		// KRYSTIAN TODO: this could be done
1267		// with fewer instructions
1268	11394x	digit = detail::load_little_endian<4>(
1269	5697x	cs.begin() + 1);
1270	5697x	int d4 = detail::hex_digit(static_cast<
1271	5697x	unsigned char>(digit >> 24));
1272	5697x	int d3 = detail::hex_digit(static_cast<
1273	5697x	unsigned char>(digit >> 16));
1274	5697x	int d2 = detail::hex_digit(static_cast<
1275	5697x	unsigned char>(digit >> 8));
1276	5697x	int d1 = detail::hex_digit(static_cast<
1277		unsigned char>(digit));
1278	5697x	if(BOOST_JSON_UNLIKELY(
1279		(d1 \| d2 \| d3 \| d4) == -1))
1280		{
1281	60x	if(d1 != -1)
1282	45x	++cs;
1283	60x	if(d2 != -1)
1284	30x	++cs;
1285	60x	if(d3 != -1)
1286	15x	++cs;
1287		BOOST_STATIC_CONSTEXPR source_location loc
1288		= BOOST_CURRENT_LOCATION;
1289	60x	return fail(cs.begin(), error::expected_hex_digit, &loc);
1290		}
1291		// 32 bit unicode scalar value
1292	5637x	unsigned u1 =
1293	5637x	(d1 << 12) + (d2 << 8) +
1294	5637x	(d3 << 4) + d4;
1295		// valid unicode scalar values are
1296		// [0, D7FF] and [E000, 10FFFF]
1297		// values within this range are valid utf-8
1298		// code points and invalid leading surrogates.
1299	5637x	if(BOOST_JSON_LIKELY(
1300		u1 < 0xd800 \|\| u1 > 0xdfff))
1301		{
1302	1340x	cs += 5;
1303	1340x	temp.append_utf8(u1);
1304	1340x	break;
1305		}
1306	4297x	if(BOOST_JSON_UNLIKELY(u1 > 0xdbff))
1307		{
1308		// If it's an illegal leading surrogate and
1309		// the parser does not allow it, return an error.
1310	707x	if(!allow_bad_utf16)
1311		{
1312		BOOST_STATIC_CONSTEXPR source_location loc
1313		= BOOST_CURRENT_LOCATION;
1314	122x	return fail(cs.begin(), error::illegal_leading_surrogate,
1315	122x	&loc);
1316		}
1317		// Otherwise, append the Unicode replacement character
1318		else
1319		{
1320	585x	cs += 5;
1321	585x	temp.append_utf8(urc);
1322	585x	break;
1323		}
1324		}
1325	3590x	cs += 5;
1326		// KRYSTIAN TODO: this can be a two byte load
1327		// and a single comparison. We lose error information,
1328		// but it's faster.
1329	3590x	if(BOOST_JSON_UNLIKELY(*cs != '\\'))
1330		{
1331		// If the next character is not a backslash and
1332		// the parser does not allow it, return a syntax error.
1333	156x	if(!allow_bad_utf16)
1334		{
1335		BOOST_STATIC_CONSTEXPR source_location loc
1336		= BOOST_CURRENT_LOCATION;
1337	15x	return fail(cs.begin(), error::syntax, &loc);
1338		}
1339		// Otherwise, append the Unicode replacement character since
1340		// the first code point is a valid leading surrogate
1341		else
1342		{
1343	141x	temp.append_utf8(urc);
1344	141x	break;
1345		}
1346		}
1347	3434x	++cs;
1348	3434x	if(BOOST_JSON_UNLIKELY(*cs != 'u'))
1349		{
1350	220x	if (!allow_bad_utf16)
1351		{
1352		BOOST_STATIC_CONSTEXPR source_location loc
1353		= BOOST_CURRENT_LOCATION;
1354	15x	return fail(cs.begin(), error::syntax, &loc);
1355		}
1356		// Otherwise, append the Unicode replacement character since
1357		// the first code point is a valid leading surrogate
1358		else
1359		{
1360	205x	temp.append_utf8(urc);
1361	205x	goto do_str3;
1362		}
1363		}
1364	3214x	++cs;
1365	3214x	digit = detail::load_little_endian<4>(cs.begin());
1366	3214x	d4 = detail::hex_digit(static_cast<
1367	3214x	unsigned char>(digit >> 24));
1368	3214x	d3 = detail::hex_digit(static_cast<
1369	3214x	unsigned char>(digit >> 16));
1370	3214x	d2 = detail::hex_digit(static_cast<
1371	3214x	unsigned char>(digit >> 8));
1372	3214x	d1 = detail::hex_digit(static_cast<
1373		unsigned char>(digit));
1374	3214x	if(BOOST_JSON_UNLIKELY(
1375		(d1 \| d2 \| d3 \| d4) == -1))
1376		{
1377	90x	if(d1 != -1)
1378	75x	++cs;
1379	90x	if(d2 != -1)
1380	45x	++cs;
1381	90x	if(d3 != -1)
1382	15x	++cs;
1383		BOOST_STATIC_CONSTEXPR source_location loc
1384		= BOOST_CURRENT_LOCATION;
1385	90x	return fail(cs.begin(), error::expected_hex_digit, &loc);
1386		}
1387	3124x	unsigned u2 =
1388	3124x	(d1 << 12) + (d2 << 8) +
1389	3124x	(d3 << 4) + d4;
1390		// Check if the second code point is a valid trailing surrogate.
1391		// Valid trailing surrogates are [DC00, DFFF]
1392	3124x	if(BOOST_JSON_UNLIKELY(
1393		u2 < 0xdc00 \|\| u2 > 0xdfff))
1394		{
1395		// If not valid and the parser does not allow it, return an error.
1396	1353x	if(!allow_bad_utf16)
1397		{
1398		BOOST_STATIC_CONSTEXPR source_location loc
1399		= BOOST_CURRENT_LOCATION;
1400	136x	return fail(cs.begin(), error::illegal_trailing_surrogate,
1401	136x	&loc);
1402		}
1403		// Append the replacement character for the
1404		// first leading surrogate.
1405	1217x	cs += 4;
1406	1217x	temp.append_utf8(urc);
1407		// Check if the second code point is a
1408		// valid unicode scalar value (invalid leading
1409		// or trailing surrogate)
1410	1217x	if (u2 < 0xd800 \|\| u2 > 0xdbff)
1411		{
1412	524x	temp.append_utf8(u2);
1413	524x	break;
1414		}
1415		// If it is a valid leading surrogate
1416		else
1417		{
1418	693x	u1_ = u2;
1419	693x	goto do_sur1;
1420		}
1421		}
1422	1771x	cs += 4;
1423		// Calculate the Unicode code point from the surrogate pair and
1424		// append the UTF-8 representation.
1425	1771x	unsigned cp =
1426	1771x	((u1 - 0xd800) << 10) +
1427		((u2 - 0xdc00)) +
1428		0x10000;
1429		// utf-16 surrogate pair
1430	1771x	temp.append_utf8(cp);
1431	1771x	break;
1432		}
1433		// flush
1434	5991x	if(BOOST_JSON_LIKELY(! temp.empty()))
1435		{
1436	3x	BOOST_ASSERT(total <= max_size);
1437	1722x	if(BOOST_JSON_UNLIKELY(
1438		temp.size() > max_size - total))
1439		{
1440		BOOST_STATIC_CONSTEXPR source_location loc
1441		= BOOST_CURRENT_LOCATION;
1442	✗	return fail(cs.begin(), ev_too_large, &loc);
1443		}
1444	1722x	total += temp.size();
1445		{
1446	1582x	bool r = is_key
1447	1722x	? h_.on_key_part(temp.get(), total, ec_)
1448	1722x	: h_.on_string_part(temp.get(), total, ec_);
1449
1450	1582x	if(BOOST_JSON_UNLIKELY(!r))
1451		{
1452	140x	return fail(cs.begin());
1453		}
1454		}
1455	1442x	temp.clear();
1456	1442x	cs.clip(temp.max_size());
1457		}
1458	5711x	++cs;
1459		// utf-16 escape
1460	6103x	do_str4:
1461	6103x	if(BOOST_JSON_UNLIKELY(! cs))
1462	392x	return maybe_suspend(cs.begin(), state::str4);
1463	5711x	digit = detail::hex_digit(*cs);
1464	5711x	if(BOOST_JSON_UNLIKELY(digit == -1))
1465		{
1466		BOOST_STATIC_CONSTEXPR source_location loc
1467		= BOOST_CURRENT_LOCATION;
1468	50x	return fail(cs.begin(), error::expected_hex_digit, &loc);
1469		}
1470	5661x	++cs;
1471	5661x	u1_ = digit << 12;
1472	6051x	do_str5:
1473	6051x	if(BOOST_JSON_UNLIKELY(! cs))
1474	390x	return maybe_suspend(cs.begin(), state::str5);
1475	5661x	digit = detail::hex_digit(*cs);
1476	5661x	if(BOOST_JSON_UNLIKELY(digit == -1))
1477		{
1478		BOOST_STATIC_CONSTEXPR source_location loc
1479		= BOOST_CURRENT_LOCATION;
1480	20x	return fail(cs.begin(), error::expected_hex_digit, &loc);
1481		}
1482	5641x	++cs;
1483	5641x	u1_ += digit << 8;
1484	6030x	do_str6:
1485	6030x	if(BOOST_JSON_UNLIKELY(! cs))
1486	389x	return maybe_suspend(cs.begin(), state::str6);
1487	5641x	digit = detail::hex_digit(*cs);
1488	5641x	if(BOOST_JSON_UNLIKELY(digit == -1))
1489		{
1490		BOOST_STATIC_CONSTEXPR source_location loc
1491		= BOOST_CURRENT_LOCATION;
1492	20x	return fail(cs.begin(), error::expected_hex_digit, &loc);
1493		}
1494	5621x	++cs;
1495	5621x	u1_ += digit << 4;
1496	6007x	do_str7:
1497	6007x	if(BOOST_JSON_UNLIKELY(! cs))
1498	386x	return maybe_suspend(cs.begin(), state::str7);
1499	5621x	digit = detail::hex_digit(*cs);
1500	5621x	if(BOOST_JSON_UNLIKELY(digit == -1))
1501		{
1502		BOOST_STATIC_CONSTEXPR source_location loc
1503		= BOOST_CURRENT_LOCATION;
1504	35x	return fail(cs.begin(), error::expected_hex_digit, &loc);
1505		}
1506	5586x	++cs;
1507	5586x	u1_ += digit;
1508	5586x	if(BOOST_JSON_LIKELY(
1509		u1_ < 0xd800 \|\| u1_ > 0xdfff))
1510		{
1511	1434x	BOOST_ASSERT(temp.empty());
1512		// utf-8 codepoint
1513	1434x	temp.append_utf8(u1_);
1514	1434x	break;
1515		}
1516	4152x	if(BOOST_JSON_UNLIKELY(u1_ > 0xdbff))
1517		{
1518		// If it's an illegal leading surrogate and
1519		// the parser does not allow it, return an error.
1520	1585x	if(!allow_bad_utf16)
1521		{
1522		BOOST_STATIC_CONSTEXPR source_location loc
1523		= BOOST_CURRENT_LOCATION;
1524	209x	return fail(cs.begin(), error::illegal_leading_surrogate, &loc);
1525		}
1526		// Otherwise, append the Unicode replacement character
1527		else
1528		{
1529	1376x	BOOST_ASSERT(temp.empty());
1530	1376x	temp.append_utf8(urc);
1531	1376x	break;
1532		}
1533		}
1534	2567x	do_sur1:
1535	3792x	if(BOOST_JSON_UNLIKELY(! cs))
1536	232x	return maybe_suspend(cs.begin(), state::sur1);
1537	3560x	if(BOOST_JSON_UNLIKELY(*cs != '\\'))
1538		{
1539		// If the next character is not a backslash and
1540		// the parser does not allow it, return a syntax error.
1541	952x	if(!allow_bad_utf16)
1542		{
1543		BOOST_STATIC_CONSTEXPR source_location loc
1544		= BOOST_CURRENT_LOCATION;
1545	149x	return fail(cs.begin(), error::syntax, &loc);
1546		}
1547		// Otherwise, append the Unicode replacement character since
1548		// the first code point is a valid leading surrogate
1549		else
1550		{
1551	803x	temp.append_utf8(urc);
1552	803x	break;
1553		}
1554		}
1555	2608x	++cs;
1556	2796x	do_sur2:
1557	2796x	if(BOOST_JSON_UNLIKELY(! cs))
1558	188x	return maybe_suspend(cs.begin(), state::sur2);
1559	2608x	if(BOOST_JSON_UNLIKELY(*cs != 'u'))
1560		{
1561	396x	if (!allow_bad_utf16)
1562		{
1563		BOOST_STATIC_CONSTEXPR source_location loc
1564		= BOOST_CURRENT_LOCATION;
1565	65x	return fail(cs.begin(), error::syntax, &loc);
1566		}
1567		// Otherwise, append the Unicode replacement character since
1568		// the first code point is a valid leading surrogate
1569		else
1570		{
1571	331x	temp.append_utf8(urc);
1572	331x	goto do_str3;
1573		}
1574		}
1575	2212x	++cs;
1576	2376x	do_sur3:
1577	2376x	if(BOOST_JSON_UNLIKELY(! cs))
1578	164x	return maybe_suspend(cs.begin(), state::sur3);
1579	2212x	digit = detail::hex_digit(*cs);
1580	2212x	if(BOOST_JSON_UNLIKELY(digit == -1))
1581		{
1582		BOOST_STATIC_CONSTEXPR source_location loc
1583		= BOOST_CURRENT_LOCATION;
1584	35x	return fail(cs.begin(), error::expected_hex_digit, &loc);
1585		}
1586	2177x	++cs;
1587	2177x	u2_ = digit << 12;
1588	2339x	do_sur4:
1589	2339x	if(BOOST_JSON_UNLIKELY(! cs))
1590	162x	return maybe_suspend(cs.begin(), state::sur4);
1591	2177x	digit = detail::hex_digit(*cs);
1592	2177x	if(BOOST_JSON_UNLIKELY(digit == -1))
1593		{
1594		BOOST_STATIC_CONSTEXPR source_location loc
1595		= BOOST_CURRENT_LOCATION;
1596	35x	return fail(cs.begin(), error::expected_hex_digit, &loc);
1597		}
1598	2142x	++cs;
1599	2142x	u2_ += digit << 8;
1600	2302x	do_sur5:
1601	2302x	if(BOOST_JSON_UNLIKELY(! cs))
1602	160x	return maybe_suspend(cs.begin(), state::sur5);
1603	2142x	digit = detail::hex_digit(*cs);
1604	2142x	if(BOOST_JSON_UNLIKELY(digit == -1))
1605		{
1606		BOOST_STATIC_CONSTEXPR source_location loc
1607		= BOOST_CURRENT_LOCATION;
1608	20x	return fail(cs.begin(), error::expected_hex_digit, &loc);
1609		}
1610	2122x	++cs;
1611	2122x	u2_ += digit << 4;
1612	2280x	do_sur6:
1613	2280x	if(BOOST_JSON_UNLIKELY(! cs))
1614	158x	return maybe_suspend(cs.begin(), state::sur6);
1615	2122x	digit = detail::hex_digit(*cs);
1616	2122x	if(BOOST_JSON_UNLIKELY(digit == -1))
1617		{
1618		BOOST_STATIC_CONSTEXPR source_location loc
1619		= BOOST_CURRENT_LOCATION;
1620	20x	return fail(cs.begin(), error::expected_hex_digit, &loc);
1621		}
1622	2102x	++cs;
1623	2102x	u2_ += digit;
1624		// Check if the second code point is a valid trailing surrogate.
1625		// Valid trailing surrogates are [DC00, DFFF]
1626	2102x	if(BOOST_JSON_UNLIKELY(
1627		u2_ < 0xdc00 \|\| u2_ > 0xdfff))
1628		{
1629		// If not valid and the parser does not allow it, return an error.
1630	580x	if(!allow_bad_utf16)
1631		{
1632		BOOST_STATIC_CONSTEXPR source_location loc
1633		= BOOST_CURRENT_LOCATION;
1634	60x	return fail(cs.begin(), error::illegal_trailing_surrogate, &loc);
1635		}
1636		// Append the replacement character for the
1637		// first leading surrogate.
1638	520x	temp.append_utf8(urc);
1639		// Check if the second code point is a
1640		// valid unicode scalar value (invalid leading
1641		// or trailing surrogate)
1642	520x	if (u2_ < 0xd800 \|\| u2_ > 0xdbff)
1643		{
1644	220x	temp.append_utf8(u2_);
1645	220x	break;
1646		}
1647		// If it is a valid leading surrogate
1648		else
1649		{
1650	300x	u1_ = u2_;
1651	300x	goto do_sur1;
1652		}
1653		}
1654		// Calculate the Unicode code point from the surrogate pair and
1655		// append the UTF-8 representation.
1656	1522x	unsigned cp =
1657	1522x	((u1_ - 0xd800) << 10) +
1658	1522x	((u2_ - 0xdc00)) +
1659		0x10000;
1660		// utf-16 surrogate pair
1661	1522x	temp.append_utf8(cp);
1662		}
1663
1664		// flush
1665	12650x	if(BOOST_JSON_UNLIKELY( !cs ) \|\| *cs != '\\')
1666	8869x	break;
1667		}
1668
1669	8869x	if(BOOST_JSON_LIKELY( temp.size() ))
1670		{
1671	433x	BOOST_ASSERT(total <= max_size);
1672	8869x	if(BOOST_JSON_UNLIKELY( temp.size() > max_size - total ))
1673		{
1674		BOOST_STATIC_CONSTEXPR source_location loc
1675		= BOOST_CURRENT_LOCATION;
1676	✗	return fail(cs.begin(), ev_too_large, &loc);
1677		}
1678
1679	8869x	total += temp.size();
1680	8056x	bool const r = is_key
1681	8869x	? h_.on_key_part(temp.get(), total, ec_)
1682	8152x	: h_.on_string_part(temp.get(), total, ec_);
1683	8056x	if(BOOST_JSON_UNLIKELY( !r ))
1684	813x	return fail( cs.begin() );
1685		}
1686
1687	7243x	return cs.begin();
1688		}
1689
1690		//----------------------------------------------------------
1691
1692		template<class Handler>
1693		template<
1694		bool StackEmpty_,
1695		bool AllowComments_/*,
1696		bool AllowTrailing_,
1697		bool AllowBadUTF8_*/>
1698		const char*
1699	109175x	basic_parser<Handler>::
1700		parse_object(const char* p,
1701		std::integral_constant<bool, StackEmpty_> stack_empty,
1702		std::integral_constant<bool, AllowComments_> allow_comments,
1703		/std::integral_constant<bool, AllowTrailing_>/ bool allow_trailing,
1704		/std::integral_constant<bool, AllowBadUTF8_>/ bool allow_bad_utf8,
1705		bool allow_bad_utf16)
1706		{
1707	109175x	detail::const_stream_wrapper cs(p, end_);
1708		std::size_t size;
1709	109175x	if(! stack_empty && ! st_.empty())
1710		{
1711		// resume
1712		state st;
1713	35047x	st_.pop(st);
1714	35047x	st_.pop(size);
1715	35047x	switch(st)
1716		{
1717	✗	default: BOOST_JSON_UNREACHABLE();
1718	1595x	case state::obj1: goto do_obj1;
1719	235x	case state::obj2: goto do_obj2;
1720	12640x	case state::obj3: goto do_obj3;
1721	1690x	case state::obj4: goto do_obj4;
1722	251x	case state::obj5: goto do_obj5;
1723	1591x	case state::obj6: goto do_obj6;
1724	15444x	case state::obj7: goto do_obj7;
1725	426x	case state::obj8: goto do_obj8;
1726	660x	case state::obj9: goto do_obj9;
1727	181x	case state::obj10: goto do_obj10;
1728	334x	case state::obj11: goto do_obj11;
1729		}
1730		}
1731	74128x	BOOST_ASSERT(*cs == '{');
1732	74128x	size = 0;
1733	74128x	if(BOOST_JSON_UNLIKELY(! depth_))
1734		{
1735		BOOST_STATIC_CONSTEXPR source_location loc = BOOST_CURRENT_LOCATION;
1736	3x	return fail(cs.begin(), error::too_deep, &loc);
1737		}
1738	74125x	--depth_;
1739	74125x	if(BOOST_JSON_UNLIKELY(
1740		! h_.on_object_begin(ec_)))
1741	2040x	return fail(cs.begin());
1742	70047x	++cs;
1743		// object:
1744		// '{' *ws '}'
1745		// '{' ws string ws ':' ws value ws [ ',' ws string ws ':' ws value *ws ] '}'
1746	73613x	do_obj1:
1747	73613x	cs = detail::count_whitespace(cs.begin(), cs.end());
1748	73613x	if(BOOST_JSON_UNLIKELY(! cs))
1749	1629x	return maybe_suspend(cs.begin(), state::obj1, size);
1750	71984x	if(BOOST_JSON_LIKELY(*cs != '}'))
1751		{
1752	69085x	if(BOOST_JSON_UNLIKELY(*cs != '\x22'))
1753		{
1754	2411x	if(allow_comments && *cs == '/')
1755		{
1756	2139x	do_obj2:
1757	2374x	cs = parse_comment(cs.begin(), stack_empty, std::false_type());
1758	2290x	if(BOOST_JSON_UNLIKELY(incomplete(cs)))
1759	319x	return suspend_or_fail(state::obj2, size);
1760	1971x	goto do_obj1;
1761		}
1762		BOOST_STATIC_CONSTEXPR source_location loc
1763		= BOOST_CURRENT_LOCATION;
1764	272x	return fail(cs.begin(), error::syntax, &loc);
1765		}
1766	66674x	loop:
1767	80826x	if(BOOST_JSON_UNLIKELY(++size >
1768		Handler::max_object_size))
1769		{
1770		BOOST_STATIC_CONSTEXPR source_location loc
1771		= BOOST_CURRENT_LOCATION;
1772	1x	return fail(cs.begin(), error::object_too_large, &loc);
1773		}
1774	80825x	do_obj3:
1775	93465x	cs = parse_string(cs.begin(), stack_empty, std::true_type(), allow_bad_utf8, allow_bad_utf16);
1776	90509x	if(BOOST_JSON_UNLIKELY(incomplete(cs)))
1777	15584x	return suspend_or_fail(state::obj3, size);
1778	74925x	do_obj4:
1779	79086x	cs = detail::count_whitespace(cs.begin(), cs.end());
1780	79086x	if(BOOST_JSON_UNLIKELY(! cs))
1781	1705x	return maybe_suspend(cs.begin(), state::obj4, size);
1782	77381x	if(BOOST_JSON_UNLIKELY(*cs != ':'))
1783		{
1784	2925x	if(allow_comments && *cs == '/')
1785		{
1786	2779x	do_obj5:
1787	3030x	cs = parse_comment(cs.begin(), stack_empty, std::false_type());
1788	2876x	if(BOOST_JSON_UNLIKELY(incomplete(cs)))
1789	405x	return suspend_or_fail(state::obj5, size);
1790	2471x	goto do_obj4;
1791		}
1792		BOOST_STATIC_CONSTEXPR source_location loc
1793		= BOOST_CURRENT_LOCATION;
1794	146x	return fail(cs.begin(), error::syntax, &loc);
1795		}
1796	74456x	++cs;
1797	76047x	do_obj6:
1798	76047x	cs = detail::count_whitespace(cs.begin(), cs.end());
1799	76047x	if(BOOST_JSON_UNLIKELY(! cs))
1800	1621x	return maybe_suspend(cs.begin(), state::obj6, size);
1801	74426x	do_obj7:
1802	89870x	cs = parse_value(cs.begin(), stack_empty, allow_comments, allow_trailing, allow_bad_utf8, allow_bad_utf16);
1803	82521x	if(BOOST_JSON_UNLIKELY(incomplete(cs)))
1804	23589x	return suspend_or_fail(state::obj7, size);
1805	58932x	do_obj8:
1806	61194x	cs = detail::count_whitespace(cs.begin(), cs.end());
1807	61194x	if(BOOST_JSON_UNLIKELY(! cs))
1808	441x	return maybe_suspend(cs.begin(), state::obj8, size);
1809	60753x	if(BOOST_JSON_LIKELY(*cs == ','))
1810		{
1811	17792x	++cs;
1812	19707x	do_obj9:
1813	19707x	cs = detail::count_whitespace(cs.begin(), cs.end());
1814	19707x	if(BOOST_JSON_UNLIKELY(! cs))
1815	690x	return maybe_suspend(cs.begin(), state::obj9, size);
1816
1817		// loop for next element
1818	19017x	if(BOOST_JSON_LIKELY(*cs == '\x22'))
1819	14152x	goto loop;
1820	4865x	if(! allow_trailing \|\| *cs != '}')
1821		{
1822	1644x	if(allow_comments && *cs == '/')
1823		{
1824	1433x	do_obj10:
1825	1614x	cs = parse_comment(cs.begin(), stack_empty, std::false_type());
1826	1525x	if(BOOST_JSON_UNLIKELY(incomplete(cs)))
1827	270x	return suspend_or_fail(state::obj10, size);
1828	1255x	goto do_obj9;
1829		}
1830		BOOST_STATIC_CONSTEXPR source_location loc
1831		= BOOST_CURRENT_LOCATION;
1832	211x	return fail(cs.begin(), error::syntax, &loc);
1833		}
1834		}
1835	42961x	else if(BOOST_JSON_UNLIKELY(*cs != '}'))
1836		{
1837	2325x	if(allow_comments && *cs == '/')
1838		{
1839	2172x	do_obj11:
1840	2506x	cs = parse_comment(cs.begin(), stack_empty, std::false_type());
1841	2338x	if(BOOST_JSON_UNLIKELY(incomplete(cs)))
1842	502x	return suspend_or_fail(state::obj11, size);
1843	1836x	goto do_obj8;
1844		}
1845		BOOST_STATIC_CONSTEXPR source_location loc
1846		= BOOST_CURRENT_LOCATION;
1847	153x	return fail(cs.begin(), error::syntax, &loc);
1848		}
1849		// got closing brace, fall through
1850		}
1851	46756x	if(BOOST_JSON_UNLIKELY(
1852		! h_.on_object_end(size, ec_)))
1853	1502x	return fail(cs.begin());
1854	43713x	++depth_;
1855	43713x	++cs;
1856	43713x	return cs.begin();
1857		}
1858
1859		//----------------------------------------------------------
1860
1861		template<class Handler>
1862		template<
1863		bool StackEmpty_,
1864		bool AllowComments_/*,
1865		bool AllowTrailing_,
1866		bool AllowBadUTF8_*/>
1867		const char*
1868	26334x	basic_parser<Handler>::
1869		parse_array(const char* p,
1870		std::integral_constant<bool, StackEmpty_> stack_empty,
1871		std::integral_constant<bool, AllowComments_> allow_comments,
1872		/std::integral_constant<bool, AllowTrailing_>/ bool allow_trailing,
1873		/std::integral_constant<bool, AllowBadUTF8_>/ bool allow_bad_utf8,
1874		bool allow_bad_utf16)
1875		{
1876	26334x	detail::const_stream_wrapper cs(p, end_);
1877		std::size_t size;
1878	26334x	if(! stack_empty && ! st_.empty())
1879		{
1880		// resume
1881		state st;
1882	5716x	st_.pop(st);
1883	5716x	st_.pop(size);
1884	5716x	switch(st)
1885		{
1886	✗	default: BOOST_JSON_UNREACHABLE();
1887	1052x	case state::arr1: goto do_arr1;
1888	384x	case state::arr2: goto do_arr2;
1889	2924x	case state::arr3: goto do_arr3;
1890	391x	case state::arr4: goto do_arr4;
1891	671x	case state::arr5: goto do_arr5;
1892	294x	case state::arr6: goto do_arr6;
1893		}
1894		}
1895	20618x	BOOST_ASSERT(*cs == '[');
1896	20618x	size = 0;
1897	20618x	if(BOOST_JSON_UNLIKELY(! depth_))
1898		{
1899		BOOST_STATIC_CONSTEXPR source_location loc = BOOST_CURRENT_LOCATION;
1900	34x	return fail(cs.begin(), error::too_deep, &loc);
1901		}
1902	20584x	--depth_;
1903	20584x	if(BOOST_JSON_UNLIKELY(
1904		! h_.on_array_begin(ec_)))
1905	812x	return fail(cs.begin());
1906	18966x	++cs;
1907		// array:
1908		// '[' *ws ']'
1909		// '[' ws value ws [ ',' ws value *ws ] ']'
1910	21551x	do_arr1:
1911	21551x	cs = detail::count_whitespace(cs.begin(), cs.end());
1912	21551x	if(BOOST_JSON_UNLIKELY(! cs))
1913	1073x	return maybe_suspend(cs.begin(), state::arr1, size);
1914	20478x	if(BOOST_JSON_LIKELY(*cs != ']'))
1915		{
1916	18730x	loop:
1917	26193x	if(allow_comments && *cs == '/')
1918		{
1919	1789x	do_arr2:
1920	2173x	cs = parse_comment(cs.begin(), stack_empty, std::false_type());
1921	2045x	if(BOOST_JSON_UNLIKELY(incomplete(cs)))
1922	512x	return suspend_or_fail(state::arr2, size);
1923	1533x	goto do_arr1;
1924		}
1925	24404x	if(BOOST_JSON_UNLIKELY(++size >
1926		Handler::max_array_size))
1927		{
1928		BOOST_STATIC_CONSTEXPR source_location loc
1929		= BOOST_CURRENT_LOCATION;
1930	1x	return fail(cs.begin(), error::array_too_large, &loc);
1931		}
1932	24403x	do_arr3:
1933		// array is not empty, value required
1934	27327x	cs = parse_value(cs.begin(), stack_empty, allow_comments, allow_trailing, allow_bad_utf8, allow_bad_utf16);
1935	24696x	if(BOOST_JSON_UNLIKELY(incomplete(cs)))
1936	9038x	return suspend_or_fail(state::arr3, size);
1937	15658x	do_arr4:
1938	17279x	cs = detail::count_whitespace(cs.begin(), cs.end());
1939	17279x	if(BOOST_JSON_UNLIKELY(! cs))
1940	500x	return maybe_suspend(cs.begin(), state::arr4, size);
1941	16779x	if(BOOST_JSON_LIKELY(*cs == ','))
1942		{
1943	9176x	++cs;
1944	9847x	do_arr5:
1945	9847x	cs = detail::count_whitespace(cs.begin(), cs.end());
1946	9847x	if(BOOST_JSON_UNLIKELY(! cs))
1947	701x	return maybe_suspend(cs.begin(), state::arr5, size);
1948		// loop for next element
1949	9146x	if(! allow_trailing \|\| *cs != ']')
1950	7463x	goto loop;
1951		}
1952	7603x	else if(BOOST_JSON_UNLIKELY(*cs != ']'))
1953		{
1954	1969x	if(allow_comments && *cs == '/')
1955		{
1956	1541x	do_arr6:
1957	1835x	cs = parse_comment(cs.begin(), stack_empty, std::false_type());
1958	1688x	if(BOOST_JSON_UNLIKELY(incomplete(cs)))
1959	458x	return suspend_or_fail(state::arr6, size);
1960	1230x	goto do_arr4;
1961		}
1962		BOOST_STATIC_CONSTEXPR source_location loc
1963		= BOOST_CURRENT_LOCATION;
1964	428x	return fail(cs.begin(), error::syntax, &loc);
1965		}
1966		// got closing bracket; fall through
1967		}
1968	9065x	if(BOOST_JSON_UNLIKELY(
1969		! h_.on_array_end(size, ec_)))
1970	547x	return fail(cs.begin());
1971	7939x	++depth_;
1972	7939x	++cs;
1973	7939x	return cs.begin();
1974		}
1975
1976		//----------------------------------------------------------
1977
1978		template<class Handler>
1979		template<bool StackEmpty_, char First_, number_precision Numbers_>
1980		const char*
1981	2126871x	basic_parser<Handler>::
1982		parse_number(const char* p,
1983		std::integral_constant<bool, StackEmpty_> stack_empty,
1984		std::integral_constant<char, First_> first,
1985		std::integral_constant<number_precision, Numbers_> mode)
1986		{
1987	2126871x	constexpr bool precise_parsing = mode == number_precision::precise;
1988	2126871x	constexpr bool no_parsing = mode == number_precision::none;
1989
1990		// only one of these will be true if we are not resuming
1991		// if negative then !zero_first && !nonzero_first
1992		// if zero_first then !nonzero_first && !negative
1993		// if nonzero_first then !zero_first && !negative
1994	2126871x	bool const negative = first == '-';
1995	2126871x	bool const zero_first = first == '0';
1996	2126871x	bool const nonzero_first = first == '+';
1997	2126871x	detail::const_stream_wrapper cs(p, end_);
1998		number num;
1999	2126871x	const char* begin = cs.begin();
2000	2126871x	if(stack_empty \|\| st_.empty())
2001		{
2002	2089697x	num.bias = 0;
2003	2089697x	num.exp = 0;
2004	2089697x	num.frac = false;
2005	2089697x	num_buf_.clear();
2006
2007		//----------------------------------
2008		//
2009		// '-'
2010		// leading minus sign
2011		//
2012	2089697x	BOOST_ASSERT(cs);
2013		if(negative)
2014	25178x	++cs;
2015
2016	2089697x	num.neg = negative;
2017	2089697x	num.frac = false;
2018	2089697x	num.exp = 0;
2019	2089697x	num.bias = 0;
2020
2021		// fast path
2022	2089697x	if( cs.remain() >= 16 + 1 + 16 ) // digits . digits
2023		{
2024		int n1;
2025
2026	9988x	if( nonzero_first \|\|
2027	9988x	(negative && *cs != '0') )
2028		{
2029	2007317x	n1 = detail::count_digits( cs.begin() );
2030	2007317x	BOOST_ASSERT(n1 >= 0 && n1 <= 16);
2031
2032	1836x	if( negative && n1 == 0 && opt_.allow_infinity_and_nan )
2033		{
2034	9x	return parse_literal(
2035		p - 1,
2036	8x	detail::literals_c<detail::literals::neg_infinity>());
2037		}
2038
2039	1827x	if( ! nonzero_first && n1 == 0 )
2040		{
2041		// digit required
2042		BOOST_STATIC_CONSTEXPR source_location loc
2043		= BOOST_CURRENT_LOCATION;
2044	2x	return fail(cs.begin(), error::syntax, &loc);
2045		}
2046
2047		BOOST_IF_CONSTEXPR( !no_parsing )
2048	2006458x	num.mant = detail::parse_unsigned( 0, cs.begin(), n1 );
2049		else
2050	848x	num.mant = 0;
2051
2052	2007306x	cs += n1;
2053
2054		// integer or floating-point with
2055		// >= 16 leading digits
2056	2007306x	if( n1 == 16 )
2057		{
2058	2001424x	goto do_num2;
2059		}
2060		}
2061		else
2062		{
2063		// 0. floating-point or 0e integer
2064	21187x	num.mant = 0;
2065	21187x	n1 = 0;
2066	21187x	++cs;
2067		}
2068
2069		{
2070	27069x	const char c = *cs;
2071	27069x	if(c != '.')
2072		{
2073	9870x	if((c \| 32) == 'e')
2074		{
2075	6576x	++cs;
2076	6576x	goto do_exp1;
2077		}
2078		BOOST_IF_CONSTEXPR( negative && !no_parsing )
2079	19x	num.mant = ~num.mant + 1;
2080	3294x	goto finish_signed;
2081		}
2082		}
2083
2084		// floating-point number
2085
2086	17199x	++cs;
2087
2088	17199x	int n2 = detail::count_digits( cs.begin() );
2089	17199x	BOOST_ASSERT(n2 >= 0 && n2 <= 16);
2090
2091	17199x	if( n2 == 0 )
2092		{
2093		// digit required
2094		BOOST_STATIC_CONSTEXPR source_location loc
2095		= BOOST_CURRENT_LOCATION;
2096	3x	return fail(cs.begin(), error::syntax, &loc);
2097		}
2098
2099		// floating-point mantissa overflow
2100	17196x	if( n1 + n2 >= 19 )
2101		{
2102	122x	goto do_num7;
2103		}
2104
2105		BOOST_IF_CONSTEXPR( !no_parsing )
2106	12855x	num.mant = detail::parse_unsigned( num.mant, cs.begin(), n2 );
2107
2108	17074x	BOOST_ASSERT(num.bias == 0);
2109
2110	17074x	num.bias -= n2;
2111
2112	17074x	cs += n2;
2113
2114	17074x	char ch = *cs;
2115
2116	17074x	if( (ch \| 32) == 'e' )
2117		{
2118	110x	++cs;
2119	110x	goto do_exp1;
2120		}
2121	16964x	else if( ch >= '0' && ch <= '9' )
2122		{
2123	10017x	goto do_num8;
2124		}
2125
2126	6947x	goto finish_dub;
2127		}
2128		}
2129		else
2130		{
2131	37174x	num = num_;
2132		state st;
2133	37174x	st_.pop(st);
2134	37174x	switch(st)
2135		{
2136	✗	default: BOOST_JSON_UNREACHABLE();
2137	602x	case state::num1: goto do_num1;
2138	6338x	case state::num2: goto do_num2;
2139	802x	case state::num3: goto do_num3;
2140	52x	case state::num4: goto do_num4;
2141	4537x	case state::num5: goto do_num5;
2142	666x	case state::num6: goto do_num6;
2143	616x	case state::num7: goto do_num7;
2144	10944x	case state::num8: goto do_num8;
2145	469x	case state::exp1: goto do_exp1;
2146	125x	case state::exp2: goto do_exp2;
2147	12023x	case state::exp3: goto do_exp3;
2148		}
2149		}
2150
2151		//----------------------------------
2152		//
2153		// DIGIT
2154		// first digit
2155		//
2156	61795x	do_num1:
2157	15792x	if(zero_first \|\| nonzero_first \|\|
2158	15792x	BOOST_JSON_LIKELY(cs))
2159		{
2160	61073x	char const c = *cs;
2161		if(zero_first)
2162		{
2163	9718x	++cs;
2164	9718x	num.mant = 0;
2165	9718x	goto do_num6;
2166		}
2167	15070x	else if(nonzero_first \|\| BOOST_JSON_LIKELY(
2168		c >= '1' && c <= '9'))
2169		{
2170	42533x	++cs;
2171	42533x	num.mant = c - '0';
2172		}
2173	8822x	else if(BOOST_JSON_UNLIKELY(
2174		c == '0'))
2175		{
2176	7627x	++cs;
2177	7627x	num.mant = 0;
2178	7627x	goto do_num6;
2179		}
2180	1195x	else if( (negative \|\| num.neg) && opt_.allow_infinity_and_nan )
2181		{
2182	1007x	st_.push(state::lit1);
2183	1007x	cur_lit_ = literal_index(detail::literals::neg_infinity);
2184	1007x	lit_offset_ = 1;
2185	1007x	return parse_literal(
2186	961x	cs.begin(), detail::literals_c<detail::literals::resume>() );
2187		}
2188		else
2189		{
2190		BOOST_STATIC_CONSTEXPR source_location loc
2191		= BOOST_CURRENT_LOCATION;
2192	188x	return fail(cs.begin(), error::syntax, &loc);
2193		}
2194		}
2195		else
2196		{
2197	722x	if(BOOST_JSON_UNLIKELY(
2198		! h_.on_number_part(
2199		{begin, cs.used(begin)}, ec_)))
2200	60x	return fail(cs.begin());
2201
2202		BOOST_IF_CONSTEXPR( precise_parsing )
2203	64x	num_buf_.append( begin, cs.used(begin) );
2204	602x	return maybe_suspend(
2205	602x	cs.begin(), state::num1, num);
2206		}
2207
2208		//----------------------------------
2209		//
2210		// 1*DIGIT
2211		// significant digits left of decimal
2212		//
2213	2050295x	do_num2:
2214	2044036x	if(negative \|\| (!stack_empty && num.neg))
2215		{
2216	22400x	for(;;)
2217		{
2218	30226x	if(BOOST_JSON_UNLIKELY(! cs))
2219		{
2220	1921x	if(BOOST_JSON_UNLIKELY(more_))
2221		{
2222	1469x	if(BOOST_JSON_UNLIKELY(
2223		! h_.on_number_part(
2224		{begin, cs.used(begin)}, ec_)))
2225	69x	return fail(cs.begin());
2226
2227		BOOST_IF_CONSTEXPR( precise_parsing )
2228	32x	num_buf_.append( begin, cs.used(begin) );
2229	1331x	return suspend(cs.begin(), state::num2, num);
2230		}
2231	452x	goto finish_int;
2232		}
2233	28305x	char const c = *cs;
2234	28305x	if(BOOST_JSON_LIKELY(
2235		c >= '0' && c <= '9'))
2236		{
2237	23223x	++cs;
2238		// 9223372036854775808 INT64_MIN
2239	23223x	if( num.mant > 922337203685477580 \|\| (
2240	22508x	num.mant == 922337203685477580 && c > '8'))
2241		break;
2242		BOOST_IF_CONSTEXPR( !no_parsing )
2243	22141x	num.mant = 10 * num.mant + ( c - '0' );
2244	22400x	continue;
2245		}
2246	5082x	goto do_num6; // [.eE]
2247		}
2248		}
2249		else
2250		{
2251	6885037x	for(;;)
2252		{
2253	8927506x	if(BOOST_JSON_UNLIKELY(! cs))
2254		{
2255	6426x	if(BOOST_JSON_UNLIKELY(more_))
2256		{
2257	5813x	if(BOOST_JSON_UNLIKELY(
2258		! h_.on_number_part(
2259		{begin, cs.used(begin)}, ec_)))
2260	406x	return fail(cs.begin());
2261
2262		BOOST_IF_CONSTEXPR( precise_parsing )
2263	174x	num_buf_.append( begin, cs.used(begin) );
2264	5007x	return suspend(cs.begin(), state::num2, num);
2265		}
2266	613x	goto finish_int;
2267		}
2268	8921080x	char const c = *cs;
2269	8921080x	if(BOOST_JSON_LIKELY(
2270		c >= '0' && c <= '9'))
2271		{
2272	6888862x	++cs;
2273		// 18446744073709551615 UINT64_MAX
2274	6888862x	if( num.mant > 1844674407370955161 \|\| (
2275	6885459x	num.mant == 1844674407370955161 && c > '5'))
2276		break;
2277		BOOST_IF_CONSTEXPR( !no_parsing )
2278	6879439x	num.mant = 10 * num.mant + ( c - '0' );
2279		}
2280		else
2281		{
2282	2032218x	goto do_num6; // [.eE]
2283		}
2284		}
2285		}
2286	4648x	++num.bias;
2287
2288		//----------------------------------
2289		//
2290		// 1*DIGIT
2291		// non-significant digits left of decimal
2292		//
2293	5450x	do_num3:
2294	11558x	for(;;)
2295		{
2296	17008x	if(BOOST_JSON_UNLIKELY(! cs))
2297		{
2298	1527x	if(BOOST_JSON_UNLIKELY(more_))
2299		{
2300	894x	if(BOOST_JSON_UNLIKELY(
2301		! h_.on_number_part(
2302		{begin, cs.used(begin)}, ec_)))
2303	46x	return fail(cs.begin());
2304
2305		BOOST_IF_CONSTEXPR( precise_parsing )
2306	12x	num_buf_.append( begin, cs.used(begin) );
2307	802x	return suspend(cs.begin(), state::num3, num);
2308		}
2309	633x	goto finish_dub;
2310		}
2311	15481x	char const c = *cs;
2312	15481x	if(BOOST_JSON_UNLIKELY(
2313		c >= '0' && c <= '9'))
2314		{
2315	11558x	if(BOOST_JSON_UNLIKELY( num.bias + 1 == INT_MAX ))
2316		{
2317		BOOST_STATIC_CONSTEXPR source_location loc
2318		= BOOST_CURRENT_LOCATION;
2319	✗	return fail(cs.begin(), error::exponent_overflow, &loc);
2320		}
2321	11558x	++cs;
2322	11558x	++num.bias;
2323		}
2324	3923x	else if(BOOST_JSON_LIKELY(
2325		c == '.'))
2326		{
2327	2028x	++cs;
2328	2028x	break;
2329		}
2330	1895x	else if((c \| 32) == 'e')
2331		{
2332	546x	++cs;
2333	546x	goto do_exp1;
2334		}
2335		else
2336		{
2337	1349x	goto finish_dub;
2338		}
2339		}
2340
2341		//----------------------------------
2342		//
2343		// DIGIT
2344		// first non-significant digit
2345		// to the right of decimal
2346		//
2347	2080x	do_num4:
2348		{
2349	2080x	if(BOOST_JSON_UNLIKELY(! cs))
2350		{
2351	64x	if(BOOST_JSON_UNLIKELY(
2352		! h_.on_number_part(
2353		{begin, cs.used(begin)}, ec_)))
2354	6x	return fail(cs.begin());
2355
2356		BOOST_IF_CONSTEXPR( precise_parsing )
2357	4x	num_buf_.append( begin, cs.used(begin) );
2358	52x	return maybe_suspend(
2359	52x	cs.begin(), state::num4, num);
2360		}
2361	2016x	char const c = *cs;
2362	2016x	if(BOOST_JSON_LIKELY(
2363		//static_cast<unsigned char>(c - '0') < 10))
2364		c >= '0' && c <= '9'))
2365		{
2366	1949x	++cs;
2367		}
2368		else
2369		{
2370		// digit required
2371		BOOST_STATIC_CONSTEXPR source_location loc
2372		= BOOST_CURRENT_LOCATION;
2373	67x	return fail(cs.begin(), error::syntax, &loc);
2374		}
2375		}
2376
2377		//----------------------------------
2378		//
2379		// 1*DIGIT
2380		// non-significant digits
2381		// to the right of decimal
2382		//
2383	2013470x	do_num5:
2384	37889832x	for(;;)
2385		{
2386	39903302x	if(BOOST_JSON_UNLIKELY(! cs))
2387		{
2388	6112x	if(BOOST_JSON_UNLIKELY(more_))
2389		{
2390	4577x	if(BOOST_JSON_UNLIKELY(
2391		! h_.on_number_part(
2392		{begin, cs.used(begin)}, ec_)))
2393	20x	return fail(cs.begin());
2394
2395		BOOST_IF_CONSTEXPR( precise_parsing )
2396	178x	num_buf_.append( begin, cs.used(begin) );
2397	4537x	return suspend(cs.begin(), state::num5, num);
2398		}
2399	1535x	goto finish_dub;
2400		}
2401	39897190x	char const c = *cs;
2402	39897190x	if(BOOST_JSON_LIKELY(
2403		c >= '0' && c <= '9'))
2404		{
2405	37889832x	++cs;
2406		}
2407	2007358x	else if((c \| 32) == 'e')
2408		{
2409	2003236x	++cs;
2410	2003236x	goto do_exp1;
2411		}
2412		else
2413		{
2414	4122x	goto finish_dub;
2415		}
2416		}
2417
2418		//----------------------------------
2419		//
2420		// [.eE]
2421		//
2422	2055311x	do_num6:
2423		{
2424	2055311x	if(BOOST_JSON_UNLIKELY(! cs))
2425		{
2426	798x	if(BOOST_JSON_UNLIKELY(more_))
2427		{
2428	751x	if(BOOST_JSON_UNLIKELY(
2429		! h_.on_number_part(
2430		{begin, cs.used(begin)}, ec_)))
2431	42x	return fail(cs.begin());
2432
2433		BOOST_IF_CONSTEXPR( precise_parsing )
2434	98x	num_buf_.append( begin, cs.used(begin) );
2435	667x	return suspend(cs.begin(), state::num6, num);
2436		}
2437	47x	goto finish_int;
2438		}
2439	2054513x	char const c = *cs;
2440	2054513x	if(BOOST_JSON_LIKELY(
2441		c == '.'))
2442		{
2443	2016097x	++cs;
2444		}
2445	38416x	else if((c \| 32) == 'e')
2446		{
2447	9140x	++cs;
2448	9140x	goto do_exp1;
2449		}
2450		else
2451		{
2452	29276x	goto finish_int;
2453		}
2454		}
2455
2456		//----------------------------------
2457		//
2458		// DIGIT
2459		// first significant digit
2460		// to the right of decimal
2461		//
2462	2016835x	do_num7:
2463		{
2464	2016835x	if(BOOST_JSON_UNLIKELY(! cs))
2465		{
2466	691x	if(BOOST_JSON_UNLIKELY(more_))
2467		{
2468	687x	if(BOOST_JSON_UNLIKELY(
2469		! h_.on_number_part(
2470		{begin, cs.used(begin)}, ec_)))
2471	35x	return fail(cs.begin());
2472
2473		BOOST_IF_CONSTEXPR( precise_parsing )
2474	96x	num_buf_.append( begin, cs.used(begin) );
2475	617x	return suspend(cs.begin(), state::num7, num);
2476		}
2477		// digit required
2478		BOOST_STATIC_CONSTEXPR source_location loc
2479		= BOOST_CURRENT_LOCATION;
2480	4x	return fail(cs.begin(), error::syntax, &loc);
2481		}
2482	2016144x	char const c = *cs;
2483	2016144x	if(BOOST_JSON_UNLIKELY(
2484		c < '0' \|\| c > '9'))
2485		{
2486		// digit required
2487		BOOST_STATIC_CONSTEXPR source_location loc
2488		= BOOST_CURRENT_LOCATION;
2489	169x	return fail(cs.begin(), error::syntax, &loc);
2490		}
2491		}
2492
2493		//----------------------------------
2494		//
2495		// 1*DIGIT
2496		// significant digits
2497		// to the right of decimal
2498		//
2499	2034436x	do_num8:
2500	3277926x	for(;;)
2501		{
2502	5314862x	if(BOOST_JSON_UNLIKELY(! cs))
2503		{
2504	12816x	if(BOOST_JSON_UNLIKELY(more_))
2505		{
2506	11080x	if(BOOST_JSON_UNLIKELY(
2507		! h_.on_number_part(
2508		{begin, cs.used(begin)}, ec_)))
2509	67x	return fail(cs.begin());
2510
2511		BOOST_IF_CONSTEXPR( precise_parsing )
2512	3442x	num_buf_.append( begin, cs.used(begin) );
2513	10945x	return suspend(cs.begin(), state::num8, num);
2514		}
2515	1736x	goto finish_dub;
2516		}
2517	5302046x	char const c = *cs;
2518	5302046x	if(BOOST_JSON_LIKELY(
2519		c >= '0' && c <= '9'))
2520		{
2521	5284910x	++cs;
2522	5279817x	if(!no_parsing && BOOST_JSON_LIKELY(
2523		num.mant <= 9007199254740991)) // 2^53-1
2524		{
2525	3277926x	if(BOOST_JSON_UNLIKELY( num.bias - 1 == INT_MIN ))
2526		{
2527		BOOST_STATIC_CONSTEXPR source_location loc
2528		= BOOST_CURRENT_LOCATION;
2529	✗	return fail(cs.begin(), error::exponent_overflow, &loc);
2530		}
2531	3277926x	--num.bias;
2532	3277926x	num.mant = 10 * num.mant + ( c - '0' );
2533		}
2534		else
2535		{
2536	2006984x	goto do_num5;
2537		}
2538		}
2539	17136x	else if((c \| 32) == 'e')
2540		{
2541	11133x	++cs;
2542	11133x	goto do_exp1;
2543		}
2544		else
2545		{
2546	6003x	goto finish_dub;
2547		}
2548		}
2549
2550		//----------------------------------
2551		//
2552		// *[+-]
2553		//
2554	2031210x	do_exp1:
2555	2031210x	if(BOOST_JSON_UNLIKELY(! cs))
2556		{
2557	565x	if(BOOST_JSON_UNLIKELY(
2558		! h_.on_number_part(
2559		{begin, cs.used(begin)}, ec_)))
2560	48x	return fail(cs.begin());
2561
2562		BOOST_IF_CONSTEXPR( precise_parsing )
2563	46x	num_buf_.append( begin, cs.used(begin) );
2564	469x	return maybe_suspend(
2565	469x	cs.begin(), state::exp1, num);
2566		}
2567	2030645x	if(*cs == '+')
2568		{
2569	1931x	++cs;
2570		}
2571	2028714x	else if(*cs == '-')
2572		{
2573	1001935x	++cs;
2574	1001935x	num.frac = true;
2575		}
2576
2577		//----------------------------------
2578		//
2579		// DIGIT
2580		// first digit of the exponent
2581		//
2582	1026779x	do_exp2:
2583		{
2584	2030770x	if(BOOST_JSON_UNLIKELY(! cs))
2585		{
2586	172x	if(BOOST_JSON_UNLIKELY(more_))
2587		{
2588	163x	if(BOOST_JSON_UNLIKELY(
2589		! h_.on_number_part(
2590		{begin, cs.used(begin)}, ec_)))
2591	19x	return fail(cs.begin());
2592
2593		BOOST_IF_CONSTEXPR( precise_parsing )
2594	4x	num_buf_.append( begin, cs.used(begin) );
2595	125x	return suspend(cs.begin(), state::exp2, num);
2596		}
2597		// digit required
2598		BOOST_STATIC_CONSTEXPR source_location loc
2599		= BOOST_CURRENT_LOCATION;
2600	9x	return fail(cs.begin(), error::syntax, &loc);
2601		}
2602	2030598x	char const c = *cs;
2603	2030598x	if(BOOST_JSON_UNLIKELY(
2604		c < '0' \|\| c > '9'))
2605		{
2606		// digit required
2607		BOOST_STATIC_CONSTEXPR source_location loc
2608		= BOOST_CURRENT_LOCATION;
2609	508x	return fail(cs.begin(), error::syntax, &loc);
2610		}
2611	2030090x	++cs;
2612	2030090x	num.exp = c - '0';
2613		}
2614
2615		//----------------------------------
2616		//
2617		// 1*DIGIT
2618		// subsequent digits in the exponent
2619		//
2620	2042113x	do_exp3:
2621	5466102x	for(;;)
2622		{
2623	7508215x	if(BOOST_JSON_UNLIKELY(! cs))
2624		{
2625	2020530x	if(BOOST_JSON_UNLIKELY(more_))
2626		{
2627	12177x	if(BOOST_JSON_UNLIKELY(
2628		! h_.on_number_part(
2629		{begin, cs.used(begin)}, ec_)))
2630	77x	return fail(cs.begin());
2631
2632		BOOST_IF_CONSTEXPR( precise_parsing )
2633	2873x	num_buf_.append( begin, cs.used(begin) );
2634	12023x	return suspend(cs.begin(), state::exp3, num);
2635		}
2636		}
2637		else
2638		{
2639	5487685x	char const c = *cs;
2640	5487685x	if(BOOST_JSON_LIKELY( c >= '0' && c <= '9' ))
2641		{
2642	5466102x	if(BOOST_JSON_UNLIKELY(
2643		// 2147483647 INT_MAX
2644		num.exp > 214748364 \|\|
2645		(num.exp == 214748364 && c > '7')
2646		))
2647	3855x	num.exp = INT_MAX;
2648		else BOOST_IF_CONSTEXPR( !no_parsing )
2649	4921395x	num.exp = 10 * num.exp + ( c - '0' );
2650
2651	5466102x	++cs;
2652	5466102x	continue;
2653		}
2654		}
2655	2029936x	BOOST_ASSERT(num.exp >= 0);
2656	2029936x	if ( num.frac )
2657		{
2658	1001799x	if(BOOST_JSON_UNLIKELY( num.bias < (INT_MIN + num.exp) ))
2659		{
2660		// if exponent overflowed, bias is a very large negative
2661		// number, and mantissa isn't zero, then we cannot parse the
2662		// number correctly
2663	91x	if(BOOST_JSON_UNLIKELY(
2664		(num.exp == INT_MAX) &&
2665		(num.bias < 0) &&
2666		(num.exp + num.bias < 308) &&
2667		num.mant ))
2668		{
2669		BOOST_STATIC_CONSTEXPR source_location loc
2670		= BOOST_CURRENT_LOCATION;
2671	✗	return fail(cs.begin(), error::exponent_overflow, &loc);
2672		}
2673
2674	91x	num.bias = 0;
2675	91x	num.exp = INT_MAX;
2676		}
2677		}
2678	1028137x	else if (BOOST_JSON_UNLIKELY( num.bias > (INT_MAX - num.exp) ))
2679		{
2680		// if exponent overflowed, bias is a very large positive number,
2681		// and mantissa isn't zero, then we cannot parse the
2682		// number correctly
2683	✗	if(BOOST_JSON_UNLIKELY(
2684		(num.exp == INT_MAX) &&
2685		(num.bias > 0) &&
2686		(num.exp - num.bias < 308) &&
2687		num.mant ))
2688		{
2689		BOOST_STATIC_CONSTEXPR source_location loc
2690		= BOOST_CURRENT_LOCATION;
2691	✗	return fail(cs.begin(), error::exponent_overflow, &loc);
2692		}
2693
2694	✗	num.bias = 0;
2695	✗	num.exp = INT_MAX;
2696		}
2697	2029936x	goto finish_dub;
2698		}
2699
2700	30388x	finish_int:
2701	28458x	if(negative \|\| (!stack_empty && num.neg))
2702		{
2703	2532x	if(BOOST_JSON_UNLIKELY(
2704		! h_.on_int64(static_cast<
2705		int64_t>(~num.mant + 1), {begin, cs.used(begin)}, ec_)))
2706	310x	return fail(cs.begin());
2707	1914x	return cs.begin();
2708		}
2709	27856x	if(num.mant <= INT64_MAX)
2710		{
2711	27554x	finish_signed:
2712	30829x	if(BOOST_JSON_UNLIKELY(
2713		! h_.on_int64(static_cast<
2714		int64_t>(num.mant), {begin, cs.used(begin)}, ec_)))
2715	2267x	return fail(cs.begin());
2716	26302x	return cs.begin();
2717		}
2718	321x	if(BOOST_JSON_UNLIKELY(
2719		! h_.on_uint64(num.mant, {begin, cs.used(begin)}, ec_)))
2720	35x	return fail(cs.begin());
2721	254x	return cs.begin();
2722	2052261x	finish_dub:
2723		double d;
2724	2052261x	std::size_t const size = cs.used(begin);
2725	2052261x	BOOST_ASSERT( !num_buf_.size() \|\| precise_parsing );
2726		BOOST_IF_CONSTEXPR( precise_parsing )
2727		{
2728	1009310x	char const* data = begin;
2729	1009310x	std::size_t full_size = size;
2730		// if we previously suspended or if the current input ends with the
2731		// number, we need to copy the current part of the number to the
2732		// temporary buffer
2733	1009310x	if(BOOST_JSON_UNLIKELY( num_buf_.size() ))
2734		{
2735	4771x	data = num_buf_.append( begin, size );
2736	4771x	full_size = num_buf_.size();
2737		}
2738	1009310x	auto const err = detail::charconv::from_chars(
2739		data, data + full_size, d );
2740	1009310x	BOOST_ASSERT( err.ec != std::errc::invalid_argument );
2741	1009310x	BOOST_ASSERT( err.ptr == data + full_size );
2742		(void)err;
2743		}
2744		else BOOST_IF_CONSTEXPR( no_parsing )
2745	9258x	d = 0;
2746		else
2747	1033693x	d = detail::dec_to_float(
2748		num.mant,
2749	531741x	num.bias + (num.frac ?
2750	501952x	-num.exp : num.exp),
2751	1033693x	num.neg);
2752	2052261x	if(BOOST_JSON_UNLIKELY(
2753		! h_.on_double(d, {begin, size}, ec_)))
2754	1903x	return fail(cs.begin());
2755	2048455x	return cs.begin();
2756		}
2757
2758		//----------------------------------------------------------
2759
2760		template<class Handler>
2761		template<class... Args>
2762	2164604x	basic_parser<Handler>::
2763		basic_parser(
2764		parse_options const& opt,
2765		Args&&... args)
2766	2164596x	: h_(std::forward<Args>(args)...)
2767	2164604x	, opt_(opt)
2768		{
2769	2164604x	}
2770
2771		//----------------------------------------------------------
2772
2773		template<class Handler>
2774		void
2775	4153127x	basic_parser<Handler>::
2776		reset() noexcept
2777		{
2778	4153127x	ec_ = {};
2779	4153127x	st_.clear();
2780	4153127x	more_ = true;
2781	4153127x	done_ = false;
2782	4153127x	clean_ = true;
2783	4153127x	num_buf_.clear();
2784	4153127x	}
2785
2786		template<class Handler>
2787		void
2788	16x	basic_parser<Handler>::
2789		fail(system::error_code ec) noexcept
2790		{
2791	16x	if(! ec)
2792		{
2793		// assign an arbitrary
2794		// error code to prevent UB
2795	✗	BOOST_JSON_FAIL(ec_, error::incomplete);
2796		}
2797		else
2798		{
2799	16x	ec_ = ec;
2800		}
2801	16x	done_ = false;
2802	16x	}
2803
2804		//----------------------------------------------------------
2805
2806		template<class Handler>
2807		std::size_t
2808	2334191x	basic_parser<Handler>::
2809		write_some(
2810		bool more,
2811		char const* data,
2812		std::size_t size,
2813		system::error_code& ec)
2814		{
2815		// see if we exited via exception
2816		// on the last call to write_some
2817	2334191x	if(! clean_)
2818		{
2819		// prevent UB
2820	1x	if(! ec_)
2821		{
2822	1x	BOOST_JSON_FAIL(ec_, error::exception);
2823		}
2824		}
2825	2334191x	if(ec_)
2826		{
2827		// error is sticky
2828	5x	ec = ec_;
2829	5x	return 0;
2830		}
2831	2334186x	clean_ = false;
2832	2334186x	more_ = more;
2833	2334186x	end_ = data + size;
2834		const char* p;
2835	2334186x	if(BOOST_JSON_LIKELY(st_.empty()))
2836		{
2837		// first time
2838	2164590x	depth_ = opt_.max_depth;
2839	2164590x	if(BOOST_JSON_UNLIKELY(
2840		! h_.on_document_begin(ec_)))
2841		{
2842	7889x	ec = ec_;
2843	7889x	return 0;
2844		}
2845	2148811x	p = parse_document(data, std::true_type());
2846		}
2847		else
2848		{
2849	169596x	p = parse_document(data, std::false_type());
2850		}
2851
2852	2299308x	if(BOOST_JSON_LIKELY(p != sentinel()))
2853		{
2854	2099051x	BOOST_ASSERT(! ec_);
2855	2099051x	if(! done_)
2856		{
2857	2031637x	done_ = true;
2858	2031637x	h_.on_document_end(ec_);
2859		}
2860		}
2861		else
2862		{
2863	200257x	if(! ec_)
2864		{
2865	173480x	if(! more_)
2866		{
2867	572x	BOOST_JSON_FAIL(ec_, error::incomplete);
2868		}
2869	172908x	else if(! st_.empty())
2870		{
2871		// consume as much trailing whitespace in
2872		// the JSON document as possible, but still
2873		// consider the parse complete
2874		state st;
2875	172908x	st_.peek(st);
2876	172908x	if( st == state::doc3 &&
2877	88550x	! done_)
2878		{
2879	70723x	done_ = true;
2880	70723x	h_.on_document_end(ec_);
2881		}
2882		}
2883		}
2884	198613x	p = end_;
2885		}
2886	2293704x	ec = ec_;
2887	2293704x	clean_ = true;
2888	2293704x	return p - data;
2889		}
2890
2891		template<class Handler>
2892		std::size_t
2893	1x	basic_parser<Handler>::
2894		write_some(
2895		bool more,
2896		char const* data,
2897		std::size_t size,
2898		std::error_code& ec)
2899		{
2900	1x	system::error_code jec;
2901	1x	std::size_t const result = write_some(more, data, size, jec);
2902	1x	ec = jec;
2903	1x	return result;
2904		}
2905
2906		#endif
2907
2908		} // namespace json
2909		} // namespace boost
2910
2911		#ifdef _MSC_VER
2912		#pragma warning(pop)
2913		#endif
2914
2915		#endif
2916