1/*
2 * Copyright (c) 1999
3 * Silicon Graphics Computer Systems, Inc.
4 *
5 * Copyright (c) 1999
6 * Boris Fomitchev
7 *
8 * This material is provided "as is", with absolutely no warranty expressed
9 * or implied. Any use is at your own risk.
10 *
11 * Permission to use or copy this software for any purpose is hereby granted
12 * without fee, provided the above notices are retained on all copies.
13 * Permission to modify the code and to distribute modified code is granted,
14 * provided the above notices are retained, and a notice that the code was
15 * modified is included with the above copyright notice.
16 *
17 */
18#ifndef _STLP_TIME_FACETS_C
19#define _STLP_TIME_FACETS_C
20
21#ifndef _STLP_INTERNAL_TIME_FACETS_H
22#  include <stl/_time_facets.h>
23#endif
24
25#ifndef _STLP_INTERNAL_NUM_PUT_H
26#  include <stl/_num_put.h>
27#endif
28
29#ifndef _STLP_INTERNAL_NUM_GET_H
30#  include <stl/_num_get.h>
31#endif
32
33_STLP_BEGIN_NAMESPACE
34
35//----------------------------------------------------------------------
36// Declarations of static template members.
37
38template <class _CharT, class _InputIterator>
39locale::id time_get<_CharT, _InputIterator>::id;
40
41template <class _CharT, class _OutputIterator>
42locale::id time_put<_CharT, _OutputIterator>::id;
43
44_STLP_MOVE_TO_PRIV_NAMESPACE
45
46/* Matching input against a list of names
47
48 * Alphabetic input of the names of months and the names
49 * of weekdays requires matching input against a list of names.
50 * We use a simple generic algorithm to accomplish this.  This
51 * algorithm is not very efficient, especially for longer lists
52 * of names, but it probably does not matter for the initial
53 * implementation and it may never matter, since we do not expect
54 * this kind of input to be used very often.  The algorithm
55 * could be improved fairly simply by creating a new list of
56 * names still in the running at each iteration.  A more sophisticated
57 * approach would be to build a tree to do the matching.
58 *
59 * We compare each character of the input to the corresponding
60 * character of each name on the list that has not been eliminated,
61 * either because every character in the name has already been
62 * matched, or because some character has not been matched.  We
63 * continue only as long as there are some names that have not been
64 * eliminated.
65
66 * We do not really need a random access iterator (a forward iterator
67 * would do), but the extra generality makes the notation clumsier,
68 * and we don't really need it.
69
70 * We can recognize a failed match by the fact that the return value
71 * will be __name_end.
72 */
73
74#define _MAXNAMES        24
75
76template <class _InIt, class _NameIt>
77size_t _STLP_CALL
78__match(_InIt& __first, _InIt& __last, _NameIt __name, _NameIt __name_end) {
79  typedef ptrdiff_t difference_type;
80  difference_type __n = __name_end - __name;
81  difference_type __i, __start = 0;
82  size_t __pos = 0;
83  difference_type __check_count = __n;
84  bool __do_not_check[_MAXNAMES];
85  size_t __matching_name_index = __n;
86
87  memset(__do_not_check, 0, sizeof(__do_not_check));
88
89  while (__first != __last) {
90    difference_type __new_n = __n;
91    for (__i = __start; __i < __n; ++__i) {
92      if (!__do_not_check[__i]) {
93        if (*__first == __name[__i][__pos]) {
94          if (__pos == (__name[__i].size() - 1)) {
95            __matching_name_index = __i;
96            __do_not_check[__i] = true;
97            if (__i == __start) ++__start;
98            --__check_count;
99            if (__check_count == 0) {
100              ++__first;
101              return __matching_name_index;
102            }
103          }
104          __new_n = __i + 1;
105        }
106        else {
107          __do_not_check[__i] = true;
108          if (__i == __start) ++__start;
109          --__check_count;
110          if (__check_count == 0)
111            return __matching_name_index;
112        }
113      }
114      else {
115        if (__i == __start) ++ __start;
116      }
117    }
118
119    __n = __new_n;
120    ++__first; ++__pos;
121  }
122
123  return __matching_name_index;
124}
125
126// __get_formatted_time reads input that is assumed to be formatted
127// according to the rules for the C strftime function (C standard,
128// 7.12.3.5).  This function is used to implement the do_get_time
129// and do_get_date virtual functions, which depend on the locale
130// specifications for the time and day formats respectively.
131// Note the catchall default case, intended mainly for the '%Z'
132// format designator, which does not make sense here since the
133// representation of timezones is not part of the locale.
134//
135// The case branches are implemented either by doing a match using
136// the appopriate name table or by doing a __get_integer_nogroup.
137//
138// 'y' format is assumed to mean that the input represents years
139// since 1900.  That is, 2002 should be represented as 102.  There
140// is no century-guessing.
141//
142// The match is successful if and only if the second component of the
143// return value is format_end.
144
145// Note that the antepenultimate parameter is being used only to determine
146// the correct overloading for the calls to __get_integer_nogroup.
147template <class _InIt1, class _Ch, class _TimeInfo>
148string::const_iterator _STLP_CALL
149__get_formatted_time _STLP_WEAK (_InIt1 __first,  _InIt1 __last,
150                                 string::const_iterator __format, string::const_iterator __format_end,
151                                 _Ch*, const _TimeInfo& __table,
152                                 const ios_base& __s, ios_base::iostate& __err, tm* __t) {
153  const ctype<_Ch>& __ct = use_facet<ctype<_Ch> >(__s.getloc());
154  typedef basic_string<_Ch, char_traits<_Ch>, allocator<_Ch> > string_type;
155  size_t offset;
156
157  while (__first != __last && __format != __format_end) {
158    offset = 0;
159    if (*__format == '%') {
160      ++__format;
161      char __c = *__format;
162      if (__c == '#') { //MS extension
163        ++__format;
164        __c = *__format;
165      }
166
167      switch (__c) {
168        case 'A':
169          offset = 7;
170        case 'a': {
171          size_t __index = __match(__first, __last,
172                                   __table._M_dayname + offset, __table._M_dayname + offset + 7);
173          if (__index == 7)
174            return __format;
175          __t->tm_wday = __STATIC_CAST(int, __index);
176          break;
177        }
178
179        case 'B':
180          offset = 12;
181        case 'b': {
182          size_t __index = __match(__first, __last,
183                                   __table._M_monthname + offset, __table._M_monthname + offset + 12);
184          if (__index == 12)
185            return __format;
186          __t->tm_mon = __STATIC_CAST(int, __index);
187          break;
188        }
189
190        case 'd': {
191          bool __pr = __get_decimal_integer(__first, __last, __t->tm_mday, __STATIC_CAST(_Ch*, 0));
192          if (!__pr || __t->tm_mday < 1 || __t->tm_mday > 31) {
193            __err |= ios_base::failbit;
194            return __format;
195          }
196          break;
197        }
198
199        case 'H': case 'I': {
200          bool __pr = __get_decimal_integer(__first, __last, __t->tm_hour, __STATIC_CAST(_Ch*, 0));
201          if (!__pr)
202            return __format;
203          break;
204        }
205
206        case 'j': {
207          bool __pr = __get_decimal_integer(__first, __last, __t->tm_yday, __STATIC_CAST(_Ch*, 0));
208          if (!__pr)
209            return __format;
210          break;
211        }
212
213        case 'm': {
214          bool __pr = __get_decimal_integer(__first, __last, __t->tm_mon, __STATIC_CAST(_Ch*, 0));
215          --__t->tm_mon;
216          if (!__pr || __t->tm_mon < 0 || __t->tm_mon > 11) {
217            __err |= ios_base::failbit;
218            return __format;
219          }
220          break;
221        }
222
223        case 'M': {
224          bool __pr = __get_decimal_integer(__first, __last, __t->tm_min, __STATIC_CAST(_Ch*, 0));
225          if (!__pr)
226            return __format;
227          break;
228        }
229
230        case 'p': {
231          size_t __index = __match(__first, __last,
232                                   __table._M_am_pm + 0, __table._M_am_pm + 2);
233          if (__index == 2)
234            return __format;
235          // 12:00 PM <=> 12:00, 12:00 AM <=> 00:00
236          if (__index == 1 && __t->tm_hour != 12 )
237            __t->tm_hour += 12;
238          if (__index == 0 && __t->tm_hour == 12 )
239            __t->tm_hour = 0;
240          break;
241        }
242
243        case 'S': {
244          bool __pr = __get_decimal_integer(__first, __last, __t->tm_sec, __STATIC_CAST(_Ch*, 0));
245          if (!__pr)
246            return __format;
247          break;
248        }
249
250        case 'y': {
251          bool __pr = __get_decimal_integer(__first, __last, __t->tm_year, __STATIC_CAST(_Ch*, 0));
252          if (!__pr)
253            return __format;
254          break;
255        }
256
257        case 'Y': {
258          bool __pr = __get_decimal_integer(__first, __last, __t->tm_year, __STATIC_CAST(_Ch*, 0));
259          __t->tm_year -= 1900;
260          if (!__pr)
261            return __format;
262          break;
263        }
264
265        default:
266          break;
267      }
268    }
269    else {
270      if (*__first++ != __ct.widen(*__format)) break;
271    }
272
273    ++__format;
274  }
275
276  return __format;
277}
278
279template <class _InIt, class _TimeInfo>
280bool _STLP_CALL
281__get_short_or_long_dayname(_InIt& __first, _InIt& __last, const _TimeInfo& __table, tm* __t) {
282  size_t __index = __match(__first, __last, __table._M_dayname + 0, __table._M_dayname + 14);
283  if (__index != 14) {
284    __t->tm_wday = __STATIC_CAST(int, __index % 7);
285    return true;
286  }
287  return false;
288}
289
290template <class _InIt, class _TimeInfo>
291bool _STLP_CALL
292__get_short_or_long_monthname(_InIt& __first, _InIt& __last, const _TimeInfo& __table, tm* __t) {
293  size_t __index = __match(__first, __last, __table._M_monthname + 0, __table._M_monthname + 24);
294  if (__index != 24) {
295    __t->tm_mon = __STATIC_CAST(int, __index % 12);
296    return true;
297  }
298  return false;
299}
300
301_STLP_MOVE_TO_STD_NAMESPACE
302
303template <class _Ch, class _InIt>
304_InIt
305time_get<_Ch, _InIt>::do_get_date(_InIt __s, _InIt  __end,
306                                  ios_base& __str, ios_base::iostate&  __err,
307                                  tm* __t) const {
308  typedef string::const_iterator string_iterator;
309
310  string_iterator __format = this->_M_timeinfo._M_date_format.begin();
311  string_iterator __format_end = this->_M_timeinfo._M_date_format.end();
312
313  string_iterator __result
314    = _STLP_PRIV __get_formatted_time(__s, __end, __format, __format_end,
315                                      __STATIC_CAST(_Ch*, 0), this->_M_timeinfo,
316                                      __str, __err, __t);
317  if (__result == __format_end)
318    __err = ios_base::goodbit;
319  else {
320    __err = ios_base::failbit;
321    if (__s == __end)
322      __err |= ios_base::eofbit;
323  }
324  return __s;
325}
326
327template <class _Ch, class _InIt>
328_InIt
329time_get<_Ch, _InIt>::do_get_time(_InIt __s, _InIt  __end,
330                                  ios_base& __str, ios_base::iostate&  __err,
331                                  tm* __t) const {
332  typedef string::const_iterator string_iterator;
333  string_iterator __format = this->_M_timeinfo._M_time_format.begin();
334  string_iterator __format_end = this->_M_timeinfo._M_time_format.end();
335
336  string_iterator __result
337    = _STLP_PRIV __get_formatted_time(__s, __end, __format, __format_end,
338                                      __STATIC_CAST(_Ch*, 0), this->_M_timeinfo,
339                                      __str, __err, __t);
340  __err = __result == __format_end ? ios_base::goodbit
341                                   : ios_base::failbit;
342  if (__s == __end)
343    __err |= ios_base::eofbit;
344  return __s;
345}
346
347template <class _Ch, class _InIt>
348_InIt
349time_get<_Ch, _InIt>::do_get_year(_InIt __s, _InIt  __end,
350                                  ios_base&, ios_base::iostate&  __err,
351                                  tm* __t) const {
352  if (__s == __end) {
353    __err = ios_base::failbit | ios_base::eofbit;
354    return __s;
355  }
356
357  bool __pr =  _STLP_PRIV __get_decimal_integer(__s, __end, __t->tm_year, __STATIC_CAST(_Ch*, 0));
358  __t->tm_year -= 1900;
359  __err = __pr ? ios_base::goodbit : ios_base::failbit;
360  if (__s == __end)
361    __err |= ios_base::eofbit;
362
363  return __s;
364}
365
366template <class _Ch, class _InIt>
367_InIt
368time_get<_Ch, _InIt>::do_get_weekday(_InIt __s, _InIt  __end,
369                                     ios_base &__str, ios_base::iostate &__err,
370                                     tm *__t) const {
371  bool __result =
372    _STLP_PRIV __get_short_or_long_dayname(__s, __end, this->_M_timeinfo, __t);
373  if (__result)
374    __err = ios_base::goodbit;
375  else {
376    __err = ios_base::failbit;
377    if (__s == __end)
378      __err |= ios_base::eofbit;
379  }
380  return __s;
381}
382
383template <class _Ch, class _InIt>
384_InIt
385time_get<_Ch, _InIt>::do_get_monthname(_InIt __s, _InIt  __end,
386                                       ios_base &__str, ios_base::iostate &__err,
387                                       tm *__t) const {
388  bool __result =
389    _STLP_PRIV __get_short_or_long_monthname(__s, __end, this->_M_timeinfo, __t);
390  if (__result)
391    __err = ios_base::goodbit;
392  else {
393    __err = ios_base::failbit;
394    if (__s == __end)
395      __err |= ios_base::eofbit;
396  }
397  return __s;
398}
399
400template<class _Ch, class _OutputIter>
401_OutputIter
402time_put<_Ch,_OutputIter>::put(_OutputIter __s, ios_base& __f, _Ch __fill,
403                               const tm* __tmb, const _Ch* __pat,
404                               const _Ch* __pat_end) const {
405  const ctype<_Ch>& _Ct = use_facet<ctype<_Ch> >(__f.getloc());
406  while (__pat != __pat_end) {
407    char __c = _Ct.narrow(*__pat, 0);
408    if (__c == '%') {
409      char __mod = 0;
410      ++__pat;
411      __c = _Ct.narrow(*__pat++, 0);
412      if (__c == '#') { // MS extension
413        __mod = __c;
414        __c = _Ct.narrow(*__pat++, 0);
415      }
416      __s = do_put(__s, __f, __fill, __tmb, __c, __mod);
417    }
418    else
419      *__s++ = *__pat++;
420  }
421  return __s;
422}
423
424template<class _Ch, class _OutputIter>
425_OutputIter
426time_put<_Ch,_OutputIter>::do_put(_OutputIter __s, ios_base& __f, _Ch /* __fill */,
427                                  const tm* __tmb, char __format,
428                                  char __modifier ) const {
429  const ctype<_Ch>& __ct = use_facet<ctype<_Ch> >(__f.getloc());
430  _STLP_BASIC_IOSTRING(_Ch) __buf;
431  _STLP_PRIV __write_formatted_time(__buf, __ct, __format, __modifier, this->_M_timeinfo, __tmb);
432  return copy(__buf.begin(), __buf.end(), __s);
433}
434
435_STLP_END_NAMESPACE
436
437#endif /* _STLP_TIME_FACETS_C */
438
439// Local Variables:
440// mode:C++
441// End:
442