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time_facet.hpp @ 857

Revision 857, 53.8 KB checked in by igarcia, 19 years ago (diff)

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1
2	#ifndef _DATE_TIME_FACET__HPP__
3	#define _DATE_TIME_FACET__HPP__
4
5	/* Copyright (c) 2004-2005 CrystalClear Software, Inc.
6	* Use, modification and distribution is subject to the
7	* Boost Software License, Version 1.0. (See accompanying
8	* file LICENSE-1.0 or http://www.boost.org/LICENSE-1.0)
9	* Author: Martin Andrian, Jeff Garland, Bart Garst
10	* $Date: 2005/07/17 23:57:59 $
11	*/
12
13	#include "boost/date_time/date_facet.hpp"
14	#include "boost/date_time/string_convert.hpp"
15	#include "boost/algorithm/string/erase.hpp"
16	#include <sstream>
17	#include <iomanip>
18	#include <exception>
19
20	namespace boost {
21	namespace date_time {
22
23	template <class CharT>
24	struct time_formats {
25	public:
26	typedef CharT char_type;
27	static const char_type fractional_seconds_format[3]; // f
28	static const char_type fractional_seconds_or_none_format[3]; // F
29	static const char_type seconds_with_fractional_seconds_format[3]; // s
30	static const char_type seconds_format[3]; // S
31	static const char_type standard_format[9]; // x X
32	static const char_type zone_abbrev_format[3]; // z
33	static const char_type zone_name_format[3]; // Z
34	static const char_type zone_iso_format[3]; // q
35	static const char_type zone_iso_extended_format[3]; // Q
36	static const char_type posix_zone_string_format[4]; // ZP
37	static const char_type duration_sign_negative_only[3]; // -
38	static const char_type duration_sign_always[3]; // +
39	static const char_type duration_seperator[2];
40	static const char_type negative_sign[2]; //-
41	static const char_type positive_sign[2]; //+
42	static const char_type iso_time_format_specifier[18];
43	static const char_type iso_time_format_extended_specifier[22];
44	//default ptime format is YYYY-Mon-DD HH:MM:SS[.fff...][ zzz]
45	static const char_type default_time_format[23];
46	// default_time_input_format uses a posix_time_zone_string instead of a time zone abbrev
47	static const char_type default_time_input_format[24];
48	//default time_duration format is HH:MM:SS[.fff...]
49	static const char_type default_time_duration_format[11];
50	};
51
52	template <class CharT>
53	const typename time_formats<CharT>::char_type
54	time_formats<CharT>::fractional_seconds_format[3] = {'%','f'};
55
56	template <class CharT>
57	const typename time_formats<CharT>::char_type
58	time_formats<CharT>::fractional_seconds_or_none_format[3] = {'%','F'};
59
60	template <class CharT>
61	const typename time_formats<CharT>::char_type
62	time_formats<CharT>::seconds_with_fractional_seconds_format[3] =
63	{'%','s'};
64
65	template <class CharT>
66	const typename time_formats<CharT>::char_type
67	time_formats<CharT>::seconds_format[3] = {'%','S'};
68
69	template <class CharT>
70	const typename time_formats<CharT>::char_type
71	//time_formats<CharT>::standard_format[5] = {'%','c',' ','%','z'};
72	time_formats<CharT>::standard_format[9] = {'%','x',' ','%','X',' ','%','z'};
73
74	template <class CharT>
75	const typename time_formats<CharT>::char_type
76	time_formats<CharT>::zone_abbrev_format[3] = {'%','z'};
77
78	template <class CharT>
79	const typename time_formats<CharT>::char_type
80	time_formats<CharT>::zone_name_format[3] = {'%','Z'};
81
82	template <class CharT>
83	const typename time_formats<CharT>::char_type
84	time_formats<CharT>::zone_iso_format[3] = {'%','q'};
85
86	template <class CharT>
87	const typename time_formats<CharT>::char_type
88	time_formats<CharT>::zone_iso_extended_format[3] ={'%','Q'};
89
90	template <class CharT>
91	const typename time_formats<CharT>::char_type
92	time_formats<CharT>::posix_zone_string_format[4] ={'%','Z','P'};
93
94	template <class CharT>
95	const typename time_formats<CharT>::char_type
96	time_formats<CharT>::duration_seperator[2] = {':'};
97
98	template <class CharT>
99	const typename time_formats<CharT>::char_type
100	time_formats<CharT>::negative_sign[2] = {'-'};
101
102	template <class CharT>
103	const typename time_formats<CharT>::char_type
104	time_formats<CharT>::positive_sign[2] = {'+'};
105
106	template <class CharT>
107	const typename time_formats<CharT>::char_type
108	time_formats<CharT>::duration_sign_negative_only[3] ={'%','-'};
109
110	template <class CharT>
111	const typename time_formats<CharT>::char_type
112	time_formats<CharT>::duration_sign_always[3] ={'%','+'};
113
114	template <class CharT>
115	const typename time_formats<CharT>::char_type
116	time_formats<CharT>::iso_time_format_specifier[18] =
117	{'%', 'Y', '%', 'm', '%', 'd', 'T',
118	'%', 'H', '%', 'M', '%', 'S', '%', 'F', '%','q' };
119
120	template <class CharT>
121	const typename time_formats<CharT>::char_type
122	time_formats<CharT>::iso_time_format_extended_specifier[22] =
123	{'%', 'Y', '-', '%', 'm', '-', '%', 'd', ' ',
124	'%', 'H', ':', '%', 'M', ':', '%', 'S', '%', 'F','%','Q'};
125
126	template <class CharT>
127	const typename time_formats<CharT>::char_type
128	time_formats<CharT>::default_time_format[23] =
129	{'%','Y','-','%','b','-','%','d',' ',
130	'%','H',':','%','M',':','%','S','%','F',' ','%','z'};
131
132	template <class CharT>
133	const typename time_formats<CharT>::char_type
134	time_formats<CharT>::default_time_input_format[24] =
135	{'%','Y','-','%','b','-','%','d',' ',
136	'%','H',':','%','M',':','%','S','%','F',' ','%','Z','P'};
137
138	template <class CharT>
139	const typename time_formats<CharT>::char_type
140	time_formats<CharT>::default_time_duration_format[11] =
141	{'%','H',':','%','M',':','%','S','%','F'};
142
143
144
145	/*! Facet used for format-based output of time types
146	* This class provides for the use of format strings to output times. In addition
147	* to the flags for formatting date elements, the following are the allowed format flags:
148	* - %x %X => default format - enables addition of more flags to default (ie. "%x %X %z")
149	* - %f => fractional seconds ".123456"
150	* - %F => fractional seconds or none: like frac sec but empty if frac sec == 0
151	* - %s => seconds w/ fractional sec "02.123" (this is the same as "%S%f)
152	* - %S => seconds "02"
153	* - %z => abbreviated time zone "EDT"
154	* - %Z => full time zone name "Eastern Daylight Time"
155	*/
156	template <class time_type,
157	class CharT,
158	class OutItrT = std::ostreambuf_iterator<CharT, std::char_traits<CharT> > >
159	class time_facet :
160	public boost::date_time::date_facet<typename time_type::date_type , CharT, OutItrT> {
161	public:
162	typedef typename time_type::date_type date_type;
163	typedef typename time_type::time_duration_type time_duration_type;
164	typedef boost::date_time::period<time_type,time_duration_type> period_type;
165	typedef boost::date_time::date_facet<typename time_type::date_type, CharT, OutItrT> base_type;
166	typedef typename base_type::string_type string_type;
167	typedef typename base_type::char_type char_type;
168	typedef typename base_type::period_formatter_type period_formatter_type;
169	typedef typename base_type::special_values_formatter_type special_values_formatter_type;
170	typedef typename base_type::date_gen_formatter_type date_gen_formatter_type;
171	static const char_type* fractional_seconds_format; // %f
172	static const char_type* fractional_seconds_or_none_format; // %F
173	static const char_type* seconds_with_fractional_seconds_format; // %s
174	static const char_type* seconds_format; // %S
175	static const char_type* standard_format; // %x X
176	static const char_type* zone_abbrev_format; // %z
177	static const char_type* zone_name_format; // %Z
178	static const char_type* zone_iso_format; // %q
179	static const char_type* zone_iso_extended_format; // %Q
180	static const char_type* posix_zone_string_format; // %ZP
181	static const char_type* duration_seperator;
182	static const char_type* duration_sign_always; // %+
183	static const char_type* duration_sign_negative_only; // %-
184	static const char_type* negative_sign; //-
185	static const char_type* positive_sign; //+
186	static const char_type* iso_time_format_specifier;
187	static const char_type* iso_time_format_extended_specifier;
188
189	//default ptime format is YYYY-Mon-DD HH:MM:SS[.fff...][ zzz]
190	static const char_type* default_time_format;
191	//default time_duration format is HH:MM:SS[.fff...]
192	static const char_type* default_time_duration_format;
193	static std::locale::id id;
194
195	#if defined (__SUNPRO_CC) && defined (_RWSTD_VER)
196	std::locale::id& __get_id (void) const { return id; }
197	#endif
198
199	//! sets default formats for ptime, local_date_time, and time_duration
200	explicit time_facet(::size_t a_ref = 0)
201	//: base_type(standard_format),
202	: base_type(default_time_format),
203	m_time_duration_format(string_type(duration_sign_negative_only) + default_time_duration_format)
204	{}
205
206	//! Construct the facet with an explicitly specified format
207	explicit time_facet(const char_type* a_format,
208	period_formatter_type period_formatter = period_formatter_type(),
209	const special_values_formatter_type& special_value_formatter = special_values_formatter_type(),
210	date_gen_formatter_type dg_formatter = date_gen_formatter_type(),
211	::size_t a_ref = 0)
212	: base_type(a_format,
213	period_formatter,
214	special_value_formatter,
215	dg_formatter,
216	a_ref),
217	m_time_duration_format(string_type(duration_sign_negative_only) + default_time_duration_format)
218	{}
219
220	//! Changes format for time_duration
221	void time_duration_format(const char_type* const format)
222	{
223	m_time_duration_format = format;
224	}
225
226	virtual void set_iso_format()
227	{
228	this->m_format = iso_time_format_specifier;
229	}
230	virtual void set_iso_extended_format()
231	{
232	this->m_format = iso_time_format_extended_specifier;
233	}
234
235	OutItrT put(OutItrT a_next,
236	std::ios_base& a_ios,
237	char_type a_fill,
238	const time_type& a_time) const
239	{
240	if (a_time.is_special()) {
241	return this->do_put_special(a_next, a_ios, a_fill,
242	a_time.date().as_special());
243	}
244	string_type format(this->m_format);
245	string_type frac_str;
246	if (format.find(seconds_with_fractional_seconds_format) != string_type::npos) {
247	// replace %s with %S.nnn
248	frac_str =
249	fractional_seconds_as_string(a_time.time_of_day(), false);
250	char_type sep = std::use_facet<std::numpunct<char_type> >(a_ios.getloc()).decimal_point();
251
252	string_type replace_string(seconds_format);
253	replace_string += sep;
254	replace_string += frac_str;
255	boost::algorithm::replace_all(format,
256	seconds_with_fractional_seconds_format,
257	replace_string);
258	}
259	/* NOTE: replacing posix_zone_string_format must be done BEFORE
260	* zone_name_format: "%ZP" & "%Z", if Z is checked first it will
261	* incorrectly replace a zone_name where a posix_string should go */
262	if (format.find(posix_zone_string_format) != string_type::npos) {
263	if(a_time.zone_abbrev().empty()) {
264	// if zone_abbrev() returns an empty string, we want to
265	// erase posix_zone_string_format from format
266	boost::algorithm::replace_all(format,
267	posix_zone_string_format,
268	"");
269	}
270	else{
271	boost::algorithm::replace_all(format,
272	posix_zone_string_format,
273	a_time.zone_as_posix_string());
274	}
275	}
276	if (format.find(zone_name_format) != string_type::npos) {
277	if(a_time.zone_name().empty()) {
278	/* TODO: this'll probably create problems if a user places
279	* the zone_*_format flag in the format with a ptime. This
280	* code removes the flag from the default formats */
281
282	// if zone_name() returns an empty string, we want to
283	// erase zone_name_format & one preceeding space
284	std::basic_stringstream<char_type> ss;
285	ss << ' ' << zone_name_format;
286	boost::algorithm::replace_all(format,
287	ss.str(),
288	"");
289	}
290	else{
291	boost::algorithm::replace_all(format,
292	zone_name_format,
293	a_time.zone_name());
294	}
295	}
296	if (format.find(zone_abbrev_format) != string_type::npos) {
297	if(a_time.zone_abbrev(false).empty()) {
298	/* TODO: this'll probably create problems if a user places
299	* the zone_*_format flag in the format with a ptime. This
300	* code removes the flag from the default formats */
301
302	// if zone_abbrev() returns an empty string, we want to
303	// erase zone_abbrev_format & one preceeding space
304	std::basic_stringstream<char_type> ss;
305	ss << ' ' << zone_abbrev_format;
306	boost::algorithm::replace_all(format,
307	ss.str(),
308	"");
309	}
310	else{
311	boost::algorithm::replace_all(format,
312	zone_abbrev_format,
313	a_time.zone_abbrev(false));
314	}
315	}
316	if (format.find(zone_iso_extended_format) != string_type::npos) {
317	if(a_time.zone_name(true).empty()) {
318	/* TODO: this'll probably create problems if a user places
319	* the zone_*_format flag in the format with a ptime. This
320	* code removes the flag from the default formats */
321
322	// if zone_name() returns an empty string, we want to
323	// erase zone_iso_extended_format from format
324	boost::algorithm::replace_all(format,
325	zone_iso_extended_format,
326	"");
327	}
328	else{
329	boost::algorithm::replace_all(format,
330	zone_iso_extended_format,
331	a_time.zone_name(true));
332	}
333	}
334
335	if (format.find(zone_iso_format) != string_type::npos) {
336	if(a_time.zone_abbrev(true).empty()) {
337	/* TODO: this'll probably create problems if a user places
338	* the zone_*_format flag in the format with a ptime. This
339	* code removes the flag from the default formats */
340
341	// if zone_abbrev() returns an empty string, we want to
342	// erase zone_iso_format from format
343	boost::algorithm::replace_all(format,
344	zone_iso_format,
345	"");
346	}
347	else{
348	boost::algorithm::replace_all(format,
349	zone_iso_format,
350	a_time.zone_abbrev(true));
351	}
352	}
353	if (format.find(fractional_seconds_format) != string_type::npos) {
354	// replace %f with nnnnnnn
355	if (!frac_str.size()) {
356	frac_str = fractional_seconds_as_string(a_time.time_of_day(), false);
357	}
358	boost::algorithm::replace_all(format,
359	fractional_seconds_format,
360	frac_str);
361	}
362
363	if (format.find(fractional_seconds_or_none_format) != string_type::npos) {
364	// replace %F with nnnnnnn or nothing if fs == 0
365	frac_str =
366	fractional_seconds_as_string(a_time.time_of_day(), true);
367	if (frac_str.size()) {
368	char_type sep = std::use_facet<std::numpunct<char_type> >(a_ios.getloc()).decimal_point();
369	string_type replace_string;
370	replace_string += sep;
371	replace_string += frac_str;
372	boost::algorithm::replace_all(format,
373	fractional_seconds_or_none_format,
374	replace_string);
375	}
376	else {
377	boost::algorithm::erase_all(format,
378	fractional_seconds_or_none_format);
379	}
380	}
381
382	return this->do_put_tm(a_next, a_ios, a_fill,
383	to_tm(a_time), format);
384	}
385
386	//! put function for time_duration
387	OutItrT put(OutItrT a_next,
388	std::ios_base& a_ios,
389	char_type a_fill,
390	const time_duration_type& a_time_dur) const
391	{
392	if (a_time_dur.is_special()) {
393	return this->do_put_special(a_next, a_ios, a_fill,
394	a_time_dur.get_rep().as_special());
395	}
396
397	string_type format(m_time_duration_format);
398	if (a_time_dur.is_negative()) {
399	// replace %- with minus sign. Should we use the numpunct facet?
400	boost::algorithm::replace_all(format,
401	duration_sign_negative_only,
402	negative_sign);
403	// remove all the %+ in the string with '-'
404	boost::algorithm::replace_all(format,
405	duration_sign_always,
406	negative_sign);
407	}
408	else { //duration is positive
409	// remove all the %- combos from the string
410	boost::algorithm::replace_all(format,
411	duration_sign_negative_only,
412	"");
413	// remove all the %+ in the string with '+'
414	boost::algorithm::replace_all(format,
415	duration_sign_always,
416	positive_sign);
417	}
418
419	string_type frac_str;
420	if (format.find(seconds_with_fractional_seconds_format) != string_type::npos) {
421	// replace %s with %S.nnn
422	frac_str =
423	fractional_seconds_as_string(a_time_dur, false);
424	char_type sep = std::use_facet<std::numpunct<char_type> >(a_ios.getloc()).decimal_point();
425
426	string_type replace_string(seconds_format);
427	replace_string += sep;
428	replace_string += frac_str;
429	boost::algorithm::replace_all(format,
430	seconds_with_fractional_seconds_format,
431	replace_string);
432	}
433	if (format.find(fractional_seconds_format) != string_type::npos) {
434	// replace %f with nnnnnnn
435	if (!frac_str.size()) {
436	frac_str = fractional_seconds_as_string(a_time_dur, false);
437	}
438	boost::algorithm::replace_all(format,
439	fractional_seconds_format,
440	frac_str);
441	}
442
443	if (format.find(fractional_seconds_or_none_format) != string_type::npos) {
444	// replace %F with nnnnnnn or nothing if fs == 0
445	frac_str =
446	fractional_seconds_as_string(a_time_dur, true);
447	if (frac_str.size()) {
448	char_type sep = std::use_facet<std::numpunct<char_type> >(a_ios.getloc()).decimal_point();
449	string_type replace_string;
450	replace_string += sep;
451	replace_string += frac_str;
452	boost::algorithm::replace_all(format,
453	fractional_seconds_or_none_format,
454	replace_string);
455	}
456	else {
457	boost::algorithm::erase_all(format,
458	fractional_seconds_or_none_format);
459	}
460	}
461
462	return this->do_put_tm(a_next, a_ios, a_fill,
463	to_tm(a_time_dur), format);
464	}
465
466	OutItrT put(OutItrT next, std::ios_base& a_ios,
467	char_type fill, const period_type& p) const
468	{
469	return this->m_period_formatter.put_period(next, a_ios, fill,p,*this);
470	}
471
472
473	protected:
474
475	static
476	string_type
477	fractional_seconds_as_string(const time_duration_type& a_time,
478	bool null_when_zero)
479	{
480	typename time_duration_type::fractional_seconds_type frac_sec =
481	a_time.fractional_seconds();
482
483	if (null_when_zero && (frac_sec == 0)) {
484	return string_type();
485	}
486
487	//make sure there is no sign
488	frac_sec = date_time::absolute_value(frac_sec);
489	std::basic_ostringstream<char_type> ss;
490	ss.imbue(std::locale::classic()); // don't want any formatting
491	ss << std::setw(time_duration_type::num_fractional_digits())
492	<< std::setfill(static_cast<char_type>('0'));
493	#if (defined(BOOST_MSVC) && (_MSC_VER <= 1200)) // 1200 == VC++ 6.0
494	// JDG [7/6/02 VC++ compatibility]
495	char_type buff[34];
496	ss << _i64toa(static_cast<boost::int64_t>(frac_sec), buff, 10);
497	#else
498	ss << frac_sec;
499	#endif
500	return ss.str();
501	}
502
503	private:
504	string_type m_time_duration_format;
505
506	};
507
508	template <class time_type, class CharT, class OutItrT>
509	std::locale::id time_facet<time_type, CharT, OutItrT>::id;
510
511	template <class time_type, class CharT, class OutItrT>
512	const typename time_facet<time_type, CharT, OutItrT>::char_type*
513	time_facet<time_type, CharT, OutItrT>::fractional_seconds_format = time_formats<CharT>::fractional_seconds_format;
514
515	template <class time_type, class CharT, class OutItrT>
516	const typename time_facet<time_type, CharT, OutItrT>::char_type*
517	time_facet<time_type, CharT, OutItrT>::fractional_seconds_or_none_format = time_formats<CharT>::fractional_seconds_or_none_format;
518
519	template <class time_type, class CharT, class OutItrT>
520	const typename time_facet<time_type, CharT, OutItrT>::char_type*
521	time_facet<time_type, CharT, OutItrT>::seconds_with_fractional_seconds_format =
522	time_formats<CharT>::seconds_with_fractional_seconds_format;
523
524
525	template <class time_type, class CharT, class OutItrT>
526	const typename time_facet<time_type, CharT, OutItrT>::char_type*
527	time_facet<time_type, CharT, OutItrT>::zone_name_format = time_formats<CharT>::zone_name_format;
528
529	template <class time_type, class CharT, class OutItrT>
530	const typename time_facet<time_type, CharT, OutItrT>::char_type*
531	time_facet<time_type, CharT, OutItrT>::zone_abbrev_format = time_formats<CharT>::zone_abbrev_format;
532
533	template <class time_type, class CharT, class OutItrT>
534	const typename time_facet<time_type, CharT, OutItrT>::char_type*
535	time_facet<time_type, CharT, OutItrT>::zone_iso_extended_format =time_formats<CharT>::zone_iso_extended_format;
536
537	template <class time_type, class CharT, class OutItrT>
538	const typename time_facet<time_type, CharT, OutItrT>::char_type*
539	time_facet<time_type, CharT, OutItrT>::posix_zone_string_format =time_formats<CharT>::posix_zone_string_format;
540
541	template <class time_type, class CharT, class OutItrT>
542	const typename time_facet<time_type, CharT, OutItrT>::char_type*
543	time_facet<time_type, CharT, OutItrT>::zone_iso_format = time_formats<CharT>::zone_iso_format;
544
545	template <class time_type, class CharT, class OutItrT>
546	const typename time_facet<time_type, CharT, OutItrT>::char_type*
547	time_facet<time_type, CharT, OutItrT>::seconds_format = time_formats<CharT>::seconds_format;
548
549	template <class time_type, class CharT, class OutItrT>
550	const typename time_facet<time_type, CharT, OutItrT>::char_type*
551	time_facet<time_type, CharT, OutItrT>::standard_format = time_formats<CharT>::standard_format;
552
553	template <class time_type, class CharT, class OutItrT>
554	const typename time_facet<time_type, CharT, OutItrT>::char_type*
555	time_facet<time_type, CharT, OutItrT>::duration_seperator = time_formats<CharT>::duration_seperator;
556
557	template <class time_type, class CharT, class OutItrT>
558	const typename time_facet<time_type, CharT, OutItrT>::char_type*
559	time_facet<time_type, CharT, OutItrT>::negative_sign = time_formats<CharT>::negative_sign;
560
561	template <class time_type, class CharT, class OutItrT>
562	const typename time_facet<time_type, CharT, OutItrT>::char_type*
563	time_facet<time_type, CharT, OutItrT>::positive_sign = time_formats<CharT>::positive_sign;
564
565	template <class time_type, class CharT, class OutItrT>
566	const typename time_facet<time_type, CharT, OutItrT>::char_type*
567	time_facet<time_type, CharT, OutItrT>::duration_sign_negative_only = time_formats<CharT>::duration_sign_negative_only;
568
569	template <class time_type, class CharT, class OutItrT>
570	const typename time_facet<time_type, CharT, OutItrT>::char_type*
571	time_facet<time_type, CharT, OutItrT>::duration_sign_always = time_formats<CharT>::duration_sign_always;
572
573	template <class time_type, class CharT, class OutItrT>
574	const typename time_facet<time_type,CharT, OutItrT>::char_type*
575	time_facet<time_type,CharT, OutItrT>::iso_time_format_specifier = time_formats<CharT>::iso_time_format_specifier;
576
577	template <class time_type, class CharT, class OutItrT>
578	const typename time_facet<time_type, CharT, OutItrT>::char_type*
579	time_facet<time_type, CharT, OutItrT>::iso_time_format_extended_specifier = time_formats<CharT>::iso_time_format_extended_specifier;
580
581	template <class time_type, class CharT, class OutItrT>
582	const typename time_facet<time_type, CharT, OutItrT>::char_type*
583	time_facet<time_type, CharT, OutItrT>::default_time_format =
584	time_formats<CharT>::default_time_format;
585
586	template <class time_type, class CharT, class OutItrT>
587	const typename time_facet<time_type, CharT, OutItrT>::char_type*
588	time_facet<time_type, CharT, OutItrT>::default_time_duration_format =
589	time_formats<CharT>::default_time_duration_format;
590
591
592	//! Facet for format-based input.
593	/*!
594	*/
595	template <class time_type,
596	class CharT,
597	class InItrT = std::istreambuf_iterator<CharT, std::char_traits<CharT> > >
598	class time_input_facet :
599	public boost::date_time::date_input_facet<typename time_type::date_type , CharT, InItrT> {
600	public:
601	typedef typename time_type::date_type date_type;
602	typedef typename time_type::time_duration_type time_duration_type;
603	typedef typename time_duration_type::fractional_seconds_type fracional_seconds_type;
604	typedef boost::date_time::period<time_type,time_duration_type> period_type;
605	typedef boost::date_time::date_input_facet<typename time_type::date_type, CharT, InItrT> base_type;
606	typedef typename base_type::duration_type date_duration_type;
607	typedef typename base_type::year_type year_type;
608	typedef typename base_type::month_type month_type;
609	typedef typename base_type::day_type day_type;
610	typedef typename base_type::string_type string_type;
611	typedef typename string_type::const_iterator const_itr;
612	typedef typename base_type::char_type char_type;
613	typedef typename base_type::format_date_parser_type format_date_parser_type;
614	typedef typename base_type::period_parser_type period_parser_type;
615	typedef typename base_type::special_values_parser_type special_values_parser_type;
616	typedef typename base_type::date_gen_parser_type date_gen_parser_type;
617	typedef typename base_type::special_values_parser_type::match_results match_results;
618
619	static const char_type* fractional_seconds_format; // f
620	static const char_type* fractional_seconds_or_none_format; // F
621	static const char_type* seconds_with_fractional_seconds_format; // s
622	static const char_type* seconds_format; // S
623	static const char_type* standard_format; // x X
624	static const char_type* zone_abbrev_format; // z
625	static const char_type* zone_name_format; // Z
626	static const char_type* zone_iso_format; // q
627	static const char_type* zone_iso_extended_format; // Q
628	static const char_type* duration_seperator;
629	static const char_type* iso_time_format_specifier;
630	static const char_type* iso_time_format_extended_specifier;
631	static const char_type* default_time_input_format;
632	static const char_type* default_time_duration_format;
633	static std::locale::id id;
634
635	//! Constructor that takes a format string for a ptime
636	explicit time_input_facet(const string_type& format, ::size_t a_ref = 0)
637	: base_type(format, a_ref),
638	m_time_duration_format(default_time_duration_format)
639	{ }
640
641	explicit time_input_facet(const string_type& format,
642	const format_date_parser_type& date_parser,
643	const special_values_parser_type& sv_parser,
644	const period_parser_type& per_parser,
645	const date_gen_parser_type& date_gen_parser,
646	::size_t a_ref = 0)
647	: base_type(format,
648	date_parser,
649	sv_parser,
650	per_parser,
651	date_gen_parser,
652	a_ref),
653	m_time_duration_format(default_time_duration_format)
654	{}
655
656	//! sets default formats for ptime, local_date_time, and time_duration
657	explicit time_input_facet(::size_t a_ref = 0)
658	: base_type(default_time_input_format, a_ref),
659	m_time_duration_format(default_time_duration_format)
660	{ }
661
662	//! Set the format for time_duration
663	void time_duration_format(const char_type* const format) {
664	m_time_duration_format = format;
665	}
666	virtual void set_iso_format()
667	{
668	this->m_format = iso_time_format_specifier;
669	}
670	virtual void set_iso_extended_format()
671	{
672	this->m_format = iso_time_format_extended_specifier;
673	}
674
675	InItrT get(InItrT& sitr,
676	InItrT& stream_end,
677	std::ios_base& a_ios,
678	period_type& p) const
679	{
680	p = this->m_period_parser.get_period(sitr,
681	stream_end,
682	a_ios,
683	p,
684	time_duration_type::unit(),
685	*this);
686	return sitr;
687	}
688
689	//default ptime format is YYYY-Mon-DD HH:MM:SS[.fff...][ zzz]
690	//default time_duration format is %H:%M:%S%F HH:MM:SS[.fff...]
691
692	InItrT get(InItrT& sitr,
693	InItrT& stream_end,
694	std::ios_base& a_ios,
695	time_duration_type& td) const
696	{
697	// skip leading whitespace
698	while((sitr != stream_end) && std::isspace(*sitr)) { ++sitr; }
699
700	bool use_current_char = false;
701
702	// num_get will consume the +/-, we may need a copy if special_value
703	char_type c = '\0';
704	if((sitr != stream_end) && (sitr == '-' \|\| sitr == '+')) {
705	c = *sitr;
706	}
707
708	long hour = 0;
709	long min = 0;
710	long sec = 0;
711	typename time_duration_type::fractional_seconds_type frac(0);
712
713	typedef std::num_get<CharT, InItrT> num_get;
714	if(!std::has_facet<num_get>(a_ios.getloc())) {
715	num_get* ng = new num_get();
716	std::locale loc = std::locale(a_ios.getloc(), ng);
717	a_ios.imbue(loc);
718	}
719
720	const_itr itr(m_time_duration_format.begin());
721	while (itr != m_time_duration_format.end() && (sitr != stream_end)) {
722	if (*itr == '%') {
723	itr++;
724	if (*itr != '%') {
725	switch(*itr) {
726	case 'H':
727	{
728	match_results mr;
729	hour = fixed_string_to_int<short, CharT>(sitr, stream_end, mr, 2);
730	if(hour == -1){
731	return check_special_value(sitr, stream_end, td, c);
732	}
733	break;
734	}
735	case 'M':
736	{
737	match_results mr;
738	min = fixed_string_to_int<short, CharT>(sitr, stream_end, mr, 2);
739	if(min == -1){
740	return check_special_value(sitr, stream_end, td, c);
741	}
742	break;
743	}
744	case 'S':
745	{
746	match_results mr;
747	sec = fixed_string_to_int<short, CharT>(sitr, stream_end, mr, 2);
748	if(sec == -1){
749	return check_special_value(sitr, stream_end, td, c);
750	}
751	break;
752	}
753	case 's':
754	{
755	match_results mr;
756	sec = fixed_string_to_int<short, CharT>(sitr, stream_end, mr, 2);
757	if(sec == -1){
758	return check_special_value(sitr, stream_end, td, c);
759	}
760	// %s is the same as %S%f so we drop through into %f
761	//break;
762	}
763	case 'f':
764	{
765	// check for decimal, check special_values if missing
766	if(*sitr == '.') {
767	++sitr;
768	parse_frac_type(sitr, stream_end, frac);
769	// sitr will point to next expected char after this parsing
770	// is complete so no need to advance it
771	use_current_char = true;
772	}
773	else {
774	return check_special_value(sitr, stream_end, td, c);
775	}
776	break;
777	}
778	case 'F':
779	{
780	// check for decimal, skip if missing
781	if(*sitr == '.') {
782	++sitr;
783	parse_frac_type(sitr, stream_end, frac);
784	// sitr will point to next expected char after this parsing
785	// is complete so no need to advance it
786	use_current_char = true;
787	}
788	else {
789	// nothing was parsed so we don't want to advance sitr
790	use_current_char = true;
791	}
792	break;
793	}
794	default:
795	{} // ignore what we don't understand?
796	}// switch
797	}
798	else { // itr == '%', second consecutive
799	sitr++;
800	}
801
802	itr++; //advance past format specifier
803	}
804	else { //skip past chars in format and in buffer
805	itr++;
806	// set use_current_char when sitr is already
807	// pointing at the next character to process
808	if (use_current_char) {
809	use_current_char = false;
810	}
811	else {
812	sitr++;
813	}
814	}
815	}
816
817	td = time_duration_type(hour, min, sec, frac);
818	return sitr;
819	}
820
821
822	//! Parses a time object from the input stream
823	InItrT get(InItrT& sitr,
824	InItrT& stream_end,
825	std::ios_base& a_ios,
826	time_type& t) const
827	{
828	string_type tz_str;
829	return get(sitr, stream_end, a_ios, t, tz_str, false);
830	}
831	//! Expects a time_zone in the input stream
832	InItrT get_local_time(InItrT& sitr,
833	InItrT& stream_end,
834	std::ios_base& a_ios,
835	time_type& t,
836	string_type& tz_str) const
837	{
838	return get(sitr, stream_end, a_ios, t, tz_str, true);
839	}
840
841	protected:
842
843	InItrT get(InItrT& sitr,
844	InItrT& stream_end,
845	std::ios_base& a_ios,
846	time_type& t,
847	string_type& tz_str,
848	bool time_is_local) const
849	{
850	// skip leading whitespace
851	while((sitr != stream_end) && std::isspace(*sitr)) { ++sitr; }
852
853	bool use_current_char = false;
854	bool use_current_format_char = false; // used whith two character flags
855
856	// num_get will consume the +/-, we may need a copy if special_value
857	char_type c = '\0';
858	if((sitr != stream_end) && (sitr == '-' \|\| sitr == '+')) {
859	c = *sitr;
860	}
861
862	// time elements
863	long hour = 0;
864	long min = 0;
865	long sec = 0;
866	typename time_duration_type::fractional_seconds_type frac(0);
867	// date elements
868	short day_of_year(0);
869	/* Initialized the following to their minimum values. These intermediate
870	* objects are used so we get specific exceptions when part of the input
871	* is unparsable.
872	* Ex: "205-Jan-15" will throw a bad_year, "2005-Jsn-15"- bad_month, etc.*/
873	year_type t_year(1400);
874	month_type t_month(1);
875	day_type t_day(1);
876
877	typedef std::num_get<CharT, InItrT> num_get;
878	if(!std::has_facet<num_get>(a_ios.getloc())) {
879	num_get* ng = new num_get();
880	std::locale loc = std::locale(a_ios.getloc(), ng);
881	a_ios.imbue(loc);
882	}
883
884	const_itr itr(this->m_format.begin());
885	while (itr != this->m_format.end() && (sitr != stream_end)) {
886	if (*itr == '%') {
887	itr++;
888	if (*itr != '%') {
889	// the cases are grouped by date & time flags - not alphabetical order
890	switch(*itr) {
891	// date flags
892	case 'Y':
893	case 'y':
894	{
895	char_type cs[3] = { '%', *itr };
896	string_type s(cs);
897	match_results mr;
898	try {
899	t_year = this->m_parser.parse_year(sitr, stream_end, s, mr);
900	}
901	catch(std::out_of_range bad_year) { // base class for bad_year exception
902	if(this->m_sv_parser.match(sitr, stream_end, mr)) {
903	t = time_type(static_cast<special_values>(mr.current_match));
904	return sitr;
905	}
906	else {
907	throw; // rethrow bad_year
908	}
909	}
910	break;
911	}
912	case 'B':
913	case 'b':
914	case 'm':
915	{
916	char_type cs[3] = { '%', *itr };
917	string_type s(cs);
918	match_results mr;
919	try {
920	t_month = this->m_parser.parse_month(sitr, stream_end, s, mr);
921	}
922	catch(std::out_of_range bad_month) { // base class for bad_month exception
923	if(this->m_sv_parser.match(sitr, stream_end, mr)) {
924	t = time_type(static_cast<special_values>(mr.current_match));
925	return sitr;
926	}
927	else {
928	throw; // rethrow bad_year
929	}
930	}
931	// did m_parser already advance sitr to next char?
932	if(mr.has_remaining()) {
933	use_current_char = true;
934	}
935	break;
936	}
937	case 'a':
938	case 'A':
939	case 'w':
940	{
941	// weekday is not used in construction but we need to get it out of the stream
942	char_type cs[3] = { '%', *itr };
943	string_type s(cs);
944	match_results mr;
945	typename date_type::day_of_week_type wd(0);
946	try {
947	wd = this->m_parser.parse_weekday(sitr, stream_end, s, mr);
948	}
949	catch(std::out_of_range bad_weekday) { // base class for bad_weekday exception
950	if(this->m_sv_parser.match(sitr, stream_end, mr)) {
951	t = time_type(static_cast<special_values>(mr.current_match));
952	return sitr;
953	}
954	else {
955	throw; // rethrow bad_weekday
956	}
957	}
958	// did m_parser already advance sitr to next char?
959	if(mr.has_remaining()) {
960	use_current_char = true;
961	}
962	break;
963	}
964	case 'j':
965	{
966	// code that gets julian day (from format_date_parser)
967	match_results mr;
968	day_of_year = fixed_string_to_int<unsigned short, CharT>(sitr, stream_end, mr, 3);
969	if(day_of_year == -1) {
970	if(this->m_sv_parser.match(sitr, stream_end, mr)) {
971	t = time_type(static_cast<special_values>(mr.current_match));
972	return sitr;
973	}
974	}
975	// these next two lines are so we get an exception with bad input
976	typedef typename time_type::date_type::day_of_year_type day_of_year_type;
977	day_of_year_type t_day_of_year(day_of_year);
978	break;
979	}
980	case 'd':
981	{
982	try {
983	t_day = this->m_parser.parse_day_of_month(sitr, stream_end);
984	}
985	catch(std::out_of_range bad_day_of_month) { // base class for exception
986	match_results mr;
987	if(this->m_sv_parser.match(sitr, stream_end, mr)) {
988	t = time_type(static_cast<special_values>(mr.current_match));
989	return sitr;
990	}
991	else {
992	throw; // rethrow bad_year
993	}
994	}
995	break;
996	}
997	// time flags
998	case 'H':
999	{
1000	match_results mr;
1001	hour = fixed_string_to_int<short, CharT>(sitr, stream_end, mr, 2);
1002	if(hour == -1){
1003	return check_special_value(sitr, stream_end, t, c);
1004	}
1005	break;
1006	}
1007	case 'M':
1008	{
1009	match_results mr;
1010	min = fixed_string_to_int<short, CharT>(sitr, stream_end, mr, 2);
1011	if(min == -1){
1012	return check_special_value(sitr, stream_end, t, c);
1013	}
1014	break;
1015	}
1016	case 'S':
1017	{
1018	match_results mr;
1019	sec = fixed_string_to_int<short, CharT>(sitr, stream_end, mr, 2);
1020	if(sec == -1){
1021	return check_special_value(sitr, stream_end, t, c);
1022	}
1023	break;
1024	}
1025	case 's':
1026	{
1027	match_results mr;
1028	sec = fixed_string_to_int<short, CharT>(sitr, stream_end, mr, 2);
1029	if(sec == -1){
1030	return check_special_value(sitr, stream_end, t, c);
1031	}
1032	// %s is the same as %S%f so we drop through into %f
1033	//break;
1034	}
1035	case 'f':
1036	{
1037	// check for decimal, check SV if missing
1038	if(*sitr == '.') {
1039	++sitr;
1040	parse_frac_type(sitr, stream_end, frac);
1041	// sitr will point to next expected char after this parsing
1042	// is complete so no need to advance it
1043	use_current_char = true;
1044	}
1045	else {
1046	return check_special_value(sitr, stream_end, t, c);
1047	}
1048	break;
1049	}
1050	case 'F':
1051	{
1052	// check for decimal, skip if missing
1053	if(*sitr == '.') {
1054	++sitr;
1055	parse_frac_type(sitr, stream_end, frac);
1056	// sitr will point to next expected char after this parsing
1057	// is complete so no need to advance it
1058	use_current_char = true;
1059	}
1060	else {
1061	// nothing was parsed so we don't want to advance sitr
1062	use_current_char = true;
1063	}
1064	break;
1065	}
1066	// time_zone flags
1067	//case 'q':
1068	//case 'Q':
1069	//case 'z':
1070	case 'Z':
1071	{
1072	if(time_is_local) { // skip if 't' is a ptime
1073	++itr;
1074	if(*itr == 'P') {
1075	// skip leading whitespace
1076	while((sitr != stream_end) && std::isspace(*sitr)) { ++sitr; }
1077	// parse zone
1078	while((sitr != stream_end) && (!std::isspace(*sitr))) {
1079	tz_str += *sitr;
1080	++sitr;
1081	}
1082	}
1083	else {
1084	use_current_format_char = true;
1085	}
1086
1087	}
1088	else {
1089	// nothing was parsed so we don't want to advance sitr
1090	use_current_char = true;
1091	}
1092
1093	break;
1094	}
1095	default:
1096	{} // ignore what we don't understand?
1097	}// switch
1098	}
1099	else { // itr == '%', second consecutive
1100	sitr++;
1101	}
1102
1103	if(use_current_format_char) {
1104	use_current_format_char = false;
1105	}
1106	else {
1107	itr++; //advance past format specifier
1108	}
1109
1110	}
1111	else { //skip past chars in format and in buffer
1112	itr++;
1113	// set use_current_char when sitr is already
1114	// pointing at the next character to process
1115	if (use_current_char) {
1116	use_current_char = false;
1117	}
1118	else {
1119	sitr++;
1120	}
1121	}
1122	}
1123
1124	date_type d(not_a_date_time);
1125	if (day_of_year > 0) {
1126	d = date_type(static_cast<unsigned short>(t_year-1),12,31) + date_duration_type(day_of_year);
1127	}
1128	else {
1129	d = date_type(t_year, t_month, t_day);
1130	}
1131
1132	time_duration_type td(hour, min, sec, frac);
1133	t = time_type(d, td);
1134	return sitr;
1135	}
1136
1137	//! Helper function to check for special_value
1138	/*! First character may have been consumed during original parse
1139	* attempt. Parameter 'c' should be a copy of that character.
1140	* Throws ios_base::failure if parse fails. */
1141	template<class temporal_type>
1142	inline
1143	InItrT check_special_value(InItrT& sitr,InItrT& stream_end, temporal_type& tt, char_type c='\0') const
1144	{
1145	match_results mr;
1146	if((c == '-' \|\| c == '+') && (*sitr != c)) { // was the first character consumed?
1147	mr.cache += c;
1148	}
1149	this->m_sv_parser.match(sitr, stream_end, mr);
1150	if(mr.current_match == match_results::PARSE_ERROR) {
1151	std::string tmp = convert_string_type<char_type, char>(mr.cache);
1152	throw std::ios_base::failure("Parse failed. No match found for '" + tmp + "'");
1153	}
1154	tt = temporal_type(static_cast<special_values>(mr.current_match));
1155	return sitr;
1156	}
1157
1158	//! Helper function for parsing a fractional second type from the stream
1159	void parse_frac_type(InItrT& sitr,
1160	InItrT& stream_end,
1161	fracional_seconds_type& frac) const
1162	{
1163	string_type cache;
1164	while((sitr != stream_end) && std::isdigit(*sitr)) {
1165	cache += *sitr;
1166	++sitr;
1167	}
1168	if(cache.size() > 0) {
1169	unsigned short precision = time_duration_type::num_fractional_digits();
1170	// input may be only the first few decimal places
1171	if(cache.size() < precision) {
1172	frac = lexical_cast<fracional_seconds_type>(cache);
1173	frac = decimal_adjust(frac, static_cast<unsigned short>(precision - cache.size()));
1174	}
1175	else {
1176	// if input has too many decimal places, drop excess digits
1177	frac = lexical_cast<fracional_seconds_type>(cache.substr(0, precision));
1178	}
1179	}
1180	}
1181
1182	private:
1183	string_type m_time_duration_format;
1184
1185	//! Helper function to adjust trailing zeros when parsing fractional digits
1186	template<class int_type>
1187	inline
1188	int_type decimal_adjust(int_type val, const unsigned short places) const
1189	{
1190	unsigned long factor = 1;
1191	for(int i = 0; i < places; ++i){
1192	factor *= 10; // shift decimal to the right
1193	}
1194	return val * factor;
1195	}
1196
1197	};
1198
1199	template <class time_type, class CharT, class InItrT>
1200	std::locale::id time_input_facet<time_type, CharT, InItrT>::id;
1201
1202	template <class time_type, class CharT, class InItrT>
1203	const typename time_input_facet<time_type, CharT, InItrT>::char_type*
1204	time_input_facet<time_type, CharT, InItrT>::fractional_seconds_format = time_formats<CharT>::fractional_seconds_format;
1205
1206	template <class time_type, class CharT, class InItrT>
1207	const typename time_input_facet<time_type, CharT, InItrT>::char_type*
1208	time_input_facet<time_type, CharT, InItrT>::fractional_seconds_or_none_format = time_formats<CharT>::fractional_seconds_or_none_format;
1209
1210	template <class time_type, class CharT, class InItrT>
1211	const typename time_input_facet<time_type, CharT, InItrT>::char_type*
1212	time_input_facet<time_type, CharT, InItrT>::seconds_with_fractional_seconds_format = time_formats<CharT>::seconds_with_fractional_seconds_format;
1213
1214	template <class time_type, class CharT, class InItrT>
1215	const typename time_input_facet<time_type, CharT, InItrT>::char_type*
1216	time_input_facet<time_type, CharT, InItrT>::seconds_format = time_formats<CharT>::seconds_format;
1217
1218	template <class time_type, class CharT, class InItrT>
1219	const typename time_input_facet<time_type, CharT, InItrT>::char_type*
1220	time_input_facet<time_type, CharT, InItrT>::standard_format = time_formats<CharT>::standard_format;
1221
1222	template <class time_type, class CharT, class InItrT>
1223	const typename time_input_facet<time_type, CharT, InItrT>::char_type*
1224	time_input_facet<time_type, CharT, InItrT>::zone_abbrev_format = time_formats<CharT>::zone_abbrev_format;
1225
1226	template <class time_type, class CharT, class InItrT>
1227	const typename time_input_facet<time_type, CharT, InItrT>::char_type*
1228	time_input_facet<time_type, CharT, InItrT>::zone_name_format = time_formats<CharT>::zone_name_format;
1229
1230	template <class time_type, class CharT, class InItrT>
1231	const typename time_input_facet<time_type, CharT, InItrT>::char_type*
1232	time_input_facet<time_type, CharT, InItrT>::zone_iso_format = time_formats<CharT>::zone_iso_format;
1233
1234	template <class time_type, class CharT, class InItrT>
1235	const typename time_input_facet<time_type, CharT, InItrT>::char_type*
1236	time_input_facet<time_type, CharT, InItrT>::zone_iso_extended_format = time_formats<CharT>::zone_iso_extended_format;
1237
1238	template <class time_type, class CharT, class InItrT>
1239	const typename time_input_facet<time_type, CharT, InItrT>::char_type*
1240	time_input_facet<time_type, CharT, InItrT>::duration_seperator = time_formats<CharT>::duration_seperator;
1241
1242	template <class time_type, class CharT, class InItrT>
1243	const typename time_input_facet<time_type, CharT, InItrT>::char_type*
1244	time_input_facet<time_type, CharT, InItrT>::iso_time_format_specifier = time_formats<CharT>::iso_time_format_specifier;
1245
1246	template <class time_type, class CharT, class InItrT>
1247	const typename time_input_facet<time_type, CharT, InItrT>::char_type*
1248	time_input_facet<time_type, CharT, InItrT>::iso_time_format_extended_specifier = time_formats<CharT>::iso_time_format_extended_specifier;
1249
1250	template <class time_type, class CharT, class InItrT>
1251	const typename time_input_facet<time_type, CharT, InItrT>::char_type*
1252	time_input_facet<time_type, CharT, InItrT>::default_time_input_format = time_formats<CharT>::default_time_input_format;
1253
1254	template <class time_type, class CharT, class InItrT>
1255	const typename time_input_facet<time_type, CharT, InItrT>::char_type*
1256	time_input_facet<time_type, CharT, InItrT>::default_time_duration_format = time_formats<CharT>::default_time_duration_format;
1257
1258
1259	} } // namespaces
1260
1261
1262	#endif
1263

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source: NonGTP/Boost/boost/date_time/time_facet.hpp @ 857

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