mirror of
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442 lines
14 KiB
C
442 lines
14 KiB
C
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/*
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* Copyright (c) 1999
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* Silicon Graphics Computer Systems, Inc.
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*
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* Copyright (c) 1999
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* Boris Fomitchev
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*
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* This material is provided "as is", with absolutely no warranty expressed
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* or implied. Any use is at your own risk.
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*
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* Permission to use or copy this software for any purpose is hereby granted
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* without fee, provided the above notices are retained on all copies.
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* Permission to modify the code and to distribute modified code is granted,
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* provided the above notices are retained, and a notice that the code was
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* modified is included with the above copyright notice.
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*
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*/
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#ifndef _STLP_TIME_FACETS_C
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#define _STLP_TIME_FACETS_C
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#ifndef _STLP_INTERNAL_TIME_FACETS_H
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# include <stl/_time_facets.h>
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#endif
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#ifndef _STLP_INTERNAL_NUM_PUT_H
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# include <stl/_num_put.h>
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#endif
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#ifndef _STLP_INTERNAL_NUM_GET_H
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# include <stl/_num_get.h>
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#endif
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_STLP_BEGIN_NAMESPACE
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//----------------------------------------------------------------------
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// Declarations of static template members.
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template <class _CharT, class _InputIterator>
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locale::id time_get<_CharT, _InputIterator>::id;
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template <class _CharT, class _OutputIterator>
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locale::id time_put<_CharT, _OutputIterator>::id;
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_STLP_MOVE_TO_PRIV_NAMESPACE
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/* Matching input against a list of names
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* Alphabetic input of the names of months and the names
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* of weekdays requires matching input against a list of names.
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* We use a simple generic algorithm to accomplish this. This
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* algorithm is not very efficient, especially for longer lists
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* of names, but it probably does not matter for the initial
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* implementation and it may never matter, since we do not expect
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* this kind of input to be used very often. The algorithm
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* could be improved fairly simply by creating a new list of
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* names still in the running at each iteration. A more sophisticated
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* approach would be to build a tree to do the matching.
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*
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* We compare each character of the input to the corresponding
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* character of each name on the list that has not been eliminated,
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* either because every character in the name has already been
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* matched, or because some character has not been matched. We
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* continue only as long as there are some names that have not been
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* eliminated.
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* We do not really need a random access iterator (a forward iterator
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* would do), but the extra generality makes the notation clumsier,
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* and we don't really need it.
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* We can recognize a failed match by the fact that the return value
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* will be __name_end.
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*/
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#define _MAXNAMES 24
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template <class _InIt, class _NameIt>
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size_t _STLP_CALL
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__match(_InIt& __first, _InIt& __last, _NameIt __name, _NameIt __name_end) {
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typedef ptrdiff_t difference_type;
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difference_type __n = __name_end - __name;
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difference_type __i, __start = 0;
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size_t __pos = 0;
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difference_type __check_count = __n;
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bool __do_not_check[_MAXNAMES];
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size_t __matching_name_index = __n;
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memset(__do_not_check, 0, sizeof(__do_not_check));
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while (__first != __last) {
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difference_type __new_n = __n;
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for (__i = __start; __i < __n; ++__i) {
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if (!__do_not_check[__i]) {
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if (*__first == __name[__i][__pos]) {
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if (__pos == (__name[__i].size() - 1)) {
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__matching_name_index = __i;
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__do_not_check[__i] = true;
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if (__i == __start) ++__start;
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--__check_count;
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if (__check_count == 0) {
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++__first;
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return __matching_name_index;
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}
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}
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__new_n = __i + 1;
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}
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else {
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__do_not_check[__i] = true;
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if (__i == __start) ++__start;
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--__check_count;
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if (__check_count == 0)
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return __matching_name_index;
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}
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}
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else {
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if (__i == __start) ++ __start;
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}
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}
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__n = __new_n;
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++__first; ++__pos;
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}
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return __matching_name_index;
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}
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// __get_formatted_time reads input that is assumed to be formatted
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// according to the rules for the C strftime function (C standard,
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// 7.12.3.5). This function is used to implement the do_get_time
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// and do_get_date virtual functions, which depend on the locale
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// specifications for the time and day formats respectively.
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// Note the catchall default case, intended mainly for the '%Z'
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// format designator, which does not make sense here since the
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// representation of timezones is not part of the locale.
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//
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// The case branches are implemented either by doing a match using
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// the appopriate name table or by doing a __get_integer_nogroup.
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//
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// 'y' format is assumed to mean that the input represents years
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// since 1900. That is, 2002 should be represented as 102. There
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// is no century-guessing.
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//
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// The match is successful if and only if the second component of the
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// return value is format_end.
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// Note that the antepenultimate parameter is being used only to determine
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// the correct overloading for the calls to __get_integer_nogroup.
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template <class _InIt1, class _Ch, class _TimeInfo>
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string::const_iterator _STLP_CALL
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__get_formatted_time _STLP_WEAK (_InIt1 __first, _InIt1 __last,
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string::const_iterator __format, string::const_iterator __format_end,
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_Ch*, const _TimeInfo& __table,
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const ios_base& __s, ios_base::iostate& __err, tm* __t) {
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const ctype<_Ch>& __ct = use_facet<ctype<_Ch> >(__s.getloc());
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typedef basic_string<_Ch, char_traits<_Ch>, allocator<_Ch> > string_type;
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size_t offset;
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while (__first != __last && __format != __format_end) {
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offset = 0;
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if (*__format == '%') {
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++__format;
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char __c = *__format;
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if (__c == '#') { //MS extension
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++__format;
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__c = *__format;
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}
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switch (__c) {
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case 'A':
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offset = 7;
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case 'a': {
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size_t __index = __match(__first, __last,
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__table._M_dayname + offset, __table._M_dayname + offset + 7);
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if (__index == 7)
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return __format;
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__t->tm_wday = __STATIC_CAST(int, __index);
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break;
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}
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case 'B':
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offset = 12;
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case 'b': {
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size_t __index = __match(__first, __last,
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__table._M_monthname + offset, __table._M_monthname + offset + 12);
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if (__index == 12)
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return __format;
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__t->tm_mon = __STATIC_CAST(int, __index);
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break;
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}
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case 'd': {
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bool __pr = __get_decimal_integer(__first, __last, __t->tm_mday, __STATIC_CAST(_Ch*, 0));
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if (!__pr || __t->tm_mday < 1 || __t->tm_mday > 31) {
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__err |= ios_base::failbit;
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return __format;
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}
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break;
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}
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case 'H': case 'I': {
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bool __pr = __get_decimal_integer(__first, __last, __t->tm_hour, __STATIC_CAST(_Ch*, 0));
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if (!__pr)
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return __format;
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break;
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}
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case 'j': {
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bool __pr = __get_decimal_integer(__first, __last, __t->tm_yday, __STATIC_CAST(_Ch*, 0));
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if (!__pr)
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return __format;
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break;
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}
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case 'm': {
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bool __pr = __get_decimal_integer(__first, __last, __t->tm_mon, __STATIC_CAST(_Ch*, 0));
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--__t->tm_mon;
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if (!__pr || __t->tm_mon < 0 || __t->tm_mon > 11) {
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__err |= ios_base::failbit;
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return __format;
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}
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break;
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}
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case 'M': {
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bool __pr = __get_decimal_integer(__first, __last, __t->tm_min, __STATIC_CAST(_Ch*, 0));
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if (!__pr)
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return __format;
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break;
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}
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case 'p': {
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size_t __index = __match(__first, __last,
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__table._M_am_pm + 0, __table._M_am_pm + 2);
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if (__index == 2)
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return __format;
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// 12:00 PM <=> 12:00, 12:00 AM <=> 00:00
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if (__index == 1 && __t->tm_hour != 12 )
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__t->tm_hour += 12;
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if (__index == 0 && __t->tm_hour == 12 )
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__t->tm_hour = 0;
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break;
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}
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case 'S': {
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bool __pr = __get_decimal_integer(__first, __last, __t->tm_sec, __STATIC_CAST(_Ch*, 0));
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if (!__pr)
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return __format;
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break;
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}
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case 'y': {
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bool __pr = __get_decimal_integer(__first, __last, __t->tm_year, __STATIC_CAST(_Ch*, 0));
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if (!__pr)
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return __format;
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break;
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}
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case 'Y': {
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bool __pr = __get_decimal_integer(__first, __last, __t->tm_year, __STATIC_CAST(_Ch*, 0));
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__t->tm_year -= 1900;
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if (!__pr)
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return __format;
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break;
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}
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default:
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break;
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}
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}
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else {
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if (*__first++ != __ct.widen(*__format)) break;
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}
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++__format;
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}
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return __format;
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}
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template <class _InIt, class _TimeInfo>
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bool _STLP_CALL
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__get_short_or_long_dayname(_InIt& __first, _InIt& __last, const _TimeInfo& __table, tm* __t) {
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size_t __index = __match(__first, __last, __table._M_dayname + 0, __table._M_dayname + 14);
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if (__index != 14) {
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__t->tm_wday = __STATIC_CAST(int, __index % 7);
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return true;
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}
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return false;
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}
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template <class _InIt, class _TimeInfo>
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bool _STLP_CALL
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__get_short_or_long_monthname(_InIt& __first, _InIt& __last, const _TimeInfo& __table, tm* __t) {
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size_t __index = __match(__first, __last, __table._M_monthname + 0, __table._M_monthname + 24);
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if (__index != 24) {
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__t->tm_mon = __STATIC_CAST(int, __index % 12);
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return true;
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}
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return false;
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}
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_STLP_MOVE_TO_STD_NAMESPACE
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template <class _Ch, class _InIt>
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_InIt
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time_get<_Ch, _InIt>::do_get_date(_InIt __s, _InIt __end,
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ios_base& __str, ios_base::iostate& __err,
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tm* __t) const {
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typedef string::const_iterator string_iterator;
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string_iterator __format = this->_M_timeinfo._M_date_format.begin();
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string_iterator __format_end = this->_M_timeinfo._M_date_format.end();
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string_iterator __result
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= _STLP_PRIV __get_formatted_time(__s, __end, __format, __format_end,
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__STATIC_CAST(_Ch*, 0), this->_M_timeinfo,
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__str, __err, __t);
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if (__result == __format_end)
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__err = ios_base::goodbit;
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else {
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__err = ios_base::failbit;
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if (__s == __end)
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__err |= ios_base::eofbit;
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}
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return __s;
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}
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template <class _Ch, class _InIt>
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_InIt
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time_get<_Ch, _InIt>::do_get_time(_InIt __s, _InIt __end,
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ios_base& __str, ios_base::iostate& __err,
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tm* __t) const {
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typedef string::const_iterator string_iterator;
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string_iterator __format = this->_M_timeinfo._M_time_format.begin();
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string_iterator __format_end = this->_M_timeinfo._M_time_format.end();
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string_iterator __result
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= _STLP_PRIV __get_formatted_time(__s, __end, __format, __format_end,
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__STATIC_CAST(_Ch*, 0), this->_M_timeinfo,
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__str, __err, __t);
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__err = __result == __format_end ? ios_base::goodbit
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: ios_base::failbit;
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if (__s == __end)
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__err |= ios_base::eofbit;
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return __s;
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}
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template <class _Ch, class _InIt>
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_InIt
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time_get<_Ch, _InIt>::do_get_year(_InIt __s, _InIt __end,
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ios_base&, ios_base::iostate& __err,
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tm* __t) const {
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if (__s == __end) {
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__err = ios_base::failbit | ios_base::eofbit;
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return __s;
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}
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bool __pr = _STLP_PRIV __get_decimal_integer(__s, __end, __t->tm_year, __STATIC_CAST(_Ch*, 0));
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__t->tm_year -= 1900;
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__err = __pr ? ios_base::goodbit : ios_base::failbit;
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if (__s == __end)
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__err |= ios_base::eofbit;
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return __s;
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}
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template <class _Ch, class _InIt>
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_InIt
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time_get<_Ch, _InIt>::do_get_weekday(_InIt __s, _InIt __end,
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ios_base &__str, ios_base::iostate &__err,
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tm *__t) const {
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bool __result =
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_STLP_PRIV __get_short_or_long_dayname(__s, __end, this->_M_timeinfo, __t);
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if (__result)
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__err = ios_base::goodbit;
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else {
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__err = ios_base::failbit;
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if (__s == __end)
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__err |= ios_base::eofbit;
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}
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return __s;
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}
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template <class _Ch, class _InIt>
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_InIt
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time_get<_Ch, _InIt>::do_get_monthname(_InIt __s, _InIt __end,
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ios_base &__str, ios_base::iostate &__err,
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tm *__t) const {
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bool __result =
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_STLP_PRIV __get_short_or_long_monthname(__s, __end, this->_M_timeinfo, __t);
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if (__result)
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__err = ios_base::goodbit;
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else {
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__err = ios_base::failbit;
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if (__s == __end)
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__err |= ios_base::eofbit;
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}
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return __s;
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}
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template<class _Ch, class _OutputIter>
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_OutputIter
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time_put<_Ch,_OutputIter>::put(_OutputIter __s, ios_base& __f, _Ch __fill,
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const tm* __tmb, const _Ch* __pat,
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const _Ch* __pat_end) const {
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const ctype<_Ch>& _Ct = use_facet<ctype<_Ch> >(__f.getloc());
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while (__pat != __pat_end) {
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char __c = _Ct.narrow(*__pat, 0);
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if (__c == '%') {
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char __mod = 0;
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++__pat;
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__c = _Ct.narrow(*__pat++, 0);
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if (__c == '#') { // MS extension
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__mod = __c;
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|
__c = _Ct.narrow(*__pat++, 0);
|
||
|
}
|
||
|
__s = do_put(__s, __f, __fill, __tmb, __c, __mod);
|
||
|
}
|
||
|
else
|
||
|
*__s++ = *__pat++;
|
||
|
}
|
||
|
return __s;
|
||
|
}
|
||
|
|
||
|
template<class _Ch, class _OutputIter>
|
||
|
_OutputIter
|
||
|
time_put<_Ch,_OutputIter>::do_put(_OutputIter __s, ios_base& __f, _Ch /* __fill */,
|
||
|
const tm* __tmb, char __format,
|
||
|
char __modifier ) const {
|
||
|
const ctype<_Ch>& __ct = use_facet<ctype<_Ch> >(__f.getloc());
|
||
|
_STLP_BASIC_IOSTRING(_Ch) __buf;
|
||
|
_STLP_PRIV __write_formatted_time(__buf, __ct, __format, __modifier, this->_M_timeinfo, __tmb);
|
||
|
return copy(__buf.begin(), __buf.end(), __s);
|
||
|
}
|
||
|
|
||
|
_STLP_END_NAMESPACE
|
||
|
|
||
|
#endif /* _STLP_TIME_FACETS_C */
|
||
|
|
||
|
// Local Variables:
|
||
|
// mode:C++
|
||
|
// End:
|