/usr/include/boost/date_time/date_generator_parser.hpp is in libboost1.55-dev 1.55.0+dfsg-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 | #ifndef DATE_TIME_DATE_GENERATOR_PARSER_HPP__
#define DATE_TIME_DATE_GENERATOR_PARSER_HPP__
/* Copyright (c) 2005 CrystalClear Software, Inc.
* Use, modification and distribution is subject to the
* Boost Software License, Version 1.0. (See accompanying
* file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
* Author: Jeff Garland, Bart Garst
* $Date: 2008-11-12 11:37:53 -0800 (Wed, 12 Nov 2008) $
*/
#include <string>
#include <vector>
#include <iterator> // istreambuf_iterator
#include <boost/throw_exception.hpp>
#include <boost/date_time/compiler_config.hpp>
#include <boost/date_time/string_parse_tree.hpp>
#include <boost/date_time/date_generators.hpp>
#include <boost/date_time/format_date_parser.hpp>
namespace boost { namespace date_time {
//! Class for date_generator parsing
/*! The elements of a date_generator "phrase" are parsed from the input stream in a
* particular order. All elements are required and the order in which they appear
* cannot change, however, the elements themselves can be changed. The default
* elements and their order are as follows:
*
* - partial_date => "dd Month"
* - nth_day_of_the_week_in_month => "nth weekday of month"
* - first_day_of_the_week_in_month => "first weekday of month"
* - last_day_of_the_week_in_month => "last weekday of month"
* - first_day_of_the_week_after => "weekday after"
* - first_day_of_the_week_before => "weekday before"
*
* Weekday and Month names and formats are handled via the date_input_facet.
*
*/
template<class date_type, typename charT>
class date_generator_parser
{
public:
typedef std::basic_string<charT> string_type;
typedef std::istreambuf_iterator<charT> stream_itr_type;
typedef typename date_type::month_type month_type;
typedef typename date_type::day_of_week_type day_of_week_type;
typedef typename date_type::day_type day_type;
typedef string_parse_tree<charT> parse_tree_type;
typedef typename parse_tree_type::parse_match_result_type match_results;
typedef std::vector<std::basic_string<charT> > collection_type;
typedef partial_date<date_type> partial_date_type;
typedef nth_kday_of_month<date_type> nth_kday_type;
typedef first_kday_of_month<date_type> first_kday_type;
typedef last_kday_of_month<date_type> last_kday_type;
typedef first_kday_after<date_type> kday_after_type;
typedef first_kday_before<date_type> kday_before_type;
typedef charT char_type;
static const char_type first_string[6];
static const char_type second_string[7];
static const char_type third_string[6];
static const char_type fourth_string[7];
static const char_type fifth_string[6];
static const char_type last_string[5];
static const char_type before_string[8];
static const char_type after_string[6];
static const char_type of_string[3];
enum phrase_elements {first=0, second, third, fourth, fifth, last,
before, after, of, number_of_phrase_elements};
//! Creates a date_generator_parser with the default set of "element_strings"
date_generator_parser()
{
element_strings(string_type(first_string),
string_type(second_string),
string_type(third_string),
string_type(fourth_string),
string_type(fifth_string),
string_type(last_string),
string_type(before_string),
string_type(after_string),
string_type(of_string));
}
//! Creates a date_generator_parser using a user defined set of element strings
date_generator_parser(const string_type& first_str,
const string_type& second_str,
const string_type& third_str,
const string_type& fourth_str,
const string_type& fifth_str,
const string_type& last_str,
const string_type& before_str,
const string_type& after_str,
const string_type& of_str)
{
element_strings(first_str, second_str, third_str, fourth_str, fifth_str,
last_str, before_str, after_str, of_str);
}
//! Replace strings that determine nth week for generator
void element_strings(const string_type& first_str,
const string_type& second_str,
const string_type& third_str,
const string_type& fourth_str,
const string_type& fifth_str,
const string_type& last_str,
const string_type& before_str,
const string_type& after_str,
const string_type& of_str)
{
collection_type phrases;
phrases.push_back(first_str);
phrases.push_back(second_str);
phrases.push_back(third_str);
phrases.push_back(fourth_str);
phrases.push_back(fifth_str);
phrases.push_back(last_str);
phrases.push_back(before_str);
phrases.push_back(after_str);
phrases.push_back(of_str);
m_element_strings = parse_tree_type(phrases, this->first); // enum first
}
void element_strings(const collection_type& col)
{
m_element_strings = parse_tree_type(col, this->first); // enum first
}
//! returns partial_date parsed from stream
template<class facet_type>
partial_date_type
get_partial_date_type(stream_itr_type& sitr,
stream_itr_type& stream_end,
std::ios_base& a_ios,
const facet_type& facet) const
{
// skip leading whitespace
while(std::isspace(*sitr) && sitr != stream_end) { ++sitr; }
day_type d(1);
month_type m(1);
facet.get(sitr, stream_end, a_ios, d);
facet.get(sitr, stream_end, a_ios, m);
return partial_date_type(d,m);
}
//! returns nth_kday_of_week parsed from stream
template<class facet_type>
nth_kday_type
get_nth_kday_type(stream_itr_type& sitr,
stream_itr_type& stream_end,
std::ios_base& a_ios,
const facet_type& facet) const
{
// skip leading whitespace
while(std::isspace(*sitr) && sitr != stream_end) { ++sitr; }
typename nth_kday_type::week_num wn;
day_of_week_type wd(0); // no default constructor
month_type m(1); // no default constructor
match_results mr = m_element_strings.match(sitr, stream_end);
switch(mr.current_match) {
case first : { wn = nth_kday_type::first; break; }
case second : { wn = nth_kday_type::second; break; }
case third : { wn = nth_kday_type::third; break; }
case fourth : { wn = nth_kday_type::fourth; break; }
case fifth : { wn = nth_kday_type::fifth; break; }
default:
{
boost::throw_exception(std::ios_base::failure("Parse failed. No match found for '" + mr.cache + "'"));
BOOST_DATE_TIME_UNREACHABLE_EXPRESSION(wn = nth_kday_type::first);
}
} // week num
facet.get(sitr, stream_end, a_ios, wd); // day_of_week
extract_element(sitr, stream_end, of); // "of" element
facet.get(sitr, stream_end, a_ios, m); // month
return nth_kday_type(wn, wd, m);
}
//! returns first_kday_of_week parsed from stream
template<class facet_type>
first_kday_type
get_first_kday_type(stream_itr_type& sitr,
stream_itr_type& stream_end,
std::ios_base& a_ios,
const facet_type& facet) const
{
// skip leading whitespace
while(std::isspace(*sitr) && sitr != stream_end) { ++sitr; }
day_of_week_type wd(0); // no default constructor
month_type m(1); // no default constructor
extract_element(sitr, stream_end, first); // "first" element
facet.get(sitr, stream_end, a_ios, wd); // day_of_week
extract_element(sitr, stream_end, of); // "of" element
facet.get(sitr, stream_end, a_ios, m); // month
return first_kday_type(wd, m);
}
//! returns last_kday_of_week parsed from stream
template<class facet_type>
last_kday_type
get_last_kday_type(stream_itr_type& sitr,
stream_itr_type& stream_end,
std::ios_base& a_ios,
const facet_type& facet) const
{
// skip leading whitespace
while(std::isspace(*sitr) && sitr != stream_end) { ++sitr; }
day_of_week_type wd(0); // no default constructor
month_type m(1); // no default constructor
extract_element(sitr, stream_end, last); // "last" element
facet.get(sitr, stream_end, a_ios, wd); // day_of_week
extract_element(sitr, stream_end, of); // "of" element
facet.get(sitr, stream_end, a_ios, m); // month
return last_kday_type(wd, m);
}
//! returns first_kday_of_week parsed from stream
template<class facet_type>
kday_before_type
get_kday_before_type(stream_itr_type& sitr,
stream_itr_type& stream_end,
std::ios_base& a_ios,
const facet_type& facet) const
{
// skip leading whitespace
while(std::isspace(*sitr) && sitr != stream_end) { ++sitr; }
day_of_week_type wd(0); // no default constructor
facet.get(sitr, stream_end, a_ios, wd); // day_of_week
extract_element(sitr, stream_end, before);// "before" element
return kday_before_type(wd);
}
//! returns first_kday_of_week parsed from stream
template<class facet_type>
kday_after_type
get_kday_after_type(stream_itr_type& sitr,
stream_itr_type& stream_end,
std::ios_base& a_ios,
const facet_type& facet) const
{
// skip leading whitespace
while(std::isspace(*sitr) && sitr != stream_end) { ++sitr; }
day_of_week_type wd(0); // no default constructor
facet.get(sitr, stream_end, a_ios, wd); // day_of_week
extract_element(sitr, stream_end, after); // "after" element
return kday_after_type(wd);
}
private:
parse_tree_type m_element_strings;
//! Extracts phrase element from input. Throws ios_base::failure on error.
void extract_element(stream_itr_type& sitr,
stream_itr_type& stream_end,
typename date_generator_parser::phrase_elements ele) const
{
// skip leading whitespace
while(std::isspace(*sitr) && sitr != stream_end) { ++sitr; }
match_results mr = m_element_strings.match(sitr, stream_end);
if(mr.current_match != ele) {
boost::throw_exception(std::ios_base::failure("Parse failed. No match found for '" + mr.cache + "'"));
}
}
};
template<class date_type, class CharT>
const typename date_generator_parser<date_type, CharT>::char_type
date_generator_parser<date_type, CharT>::first_string[6] =
{'f','i','r','s','t'};
template<class date_type, class CharT>
const typename date_generator_parser<date_type, CharT>::char_type
date_generator_parser<date_type, CharT>::second_string[7] =
{'s','e','c','o','n','d'};
template<class date_type, class CharT>
const typename date_generator_parser<date_type, CharT>::char_type
date_generator_parser<date_type, CharT>::third_string[6] =
{'t','h','i','r','d'};
template<class date_type, class CharT>
const typename date_generator_parser<date_type, CharT>::char_type
date_generator_parser<date_type, CharT>::fourth_string[7] =
{'f','o','u','r','t','h'};
template<class date_type, class CharT>
const typename date_generator_parser<date_type, CharT>::char_type
date_generator_parser<date_type, CharT>::fifth_string[6] =
{'f','i','f','t','h'};
template<class date_type, class CharT>
const typename date_generator_parser<date_type, CharT>::char_type
date_generator_parser<date_type, CharT>::last_string[5] =
{'l','a','s','t'};
template<class date_type, class CharT>
const typename date_generator_parser<date_type, CharT>::char_type
date_generator_parser<date_type, CharT>::before_string[8] =
{'b','e','f','o','r','e'};
template<class date_type, class CharT>
const typename date_generator_parser<date_type, CharT>::char_type
date_generator_parser<date_type, CharT>::after_string[6] =
{'a','f','t','e','r'};
template<class date_type, class CharT>
const typename date_generator_parser<date_type, CharT>::char_type
date_generator_parser<date_type, CharT>::of_string[3] =
{'o','f'};
} } //namespace
#endif // DATE_TIME_DATE_GENERATOR_PARSER_HPP__
|