16 #include <daw/daw_arith_traits.h>
17 #include <daw/daw_cpp_feature_check.h>
18 #include <daw/daw_string_view.h>
19 #include <daw/daw_traits.h>
20 #include <daw/daw_uint_buffer.h>
28 namespace parse_utils {
29 template<
typename Result, std::
size_t count>
31 UInt64 result = UInt64( );
32 for( std::size_t n = 0; n < count; ++n ) {
36 return static_cast<Result
>( result );
39 template<
typename Result>
41 UInt64 result = UInt64( );
49 return static_cast<Result
>( result );
58 namespace datetime_details {
60 template<
typename Result,
typename Bounds, std::ptrdiff_t Ex>
63 static_assert( daw::numeric_limits<Result>::digits10 >= 4 );
67 if( sv.front( ) ==
'-' ) {
68 if constexpr( daw::is_signed_v<Result> ) {
72 }
else if( sv.front( ) ==
'+' ) {
75 while( not sv.empty( ) ) {
79 result +=
static_cast<Result
>( dig );
86 template<
typename Clock = std::chrono::system_clock,
87 typename Duration = std::chrono::milliseconds>
88 constexpr std::chrono::time_point<Clock, Duration>
90 std::uint_least32_t dy, std::uint_least32_t hr,
91 std::uint_least32_t mn, std::uint_least32_t se,
92 std::uint_least32_t ms ) {
93 constexpr
auto calc = []( std::int_least32_t y, std::uint_least32_t m,
94 std::uint_least32_t d, std::uint_least32_t h,
95 std::uint_least32_t min,
96 std::uint_least32_t s,
97 std::uint_least32_t mil ) {
98 y -=
static_cast<std::int_least32_t
>( m ) <= 2;
99 std::int_least32_t
const era = ( y >= 0 ? y : y - 399 ) / 400;
100 auto const yoe =
static_cast<std::uint_least32_t
>(
101 static_cast<std::int_least32_t
>( y ) - era * 400 );
102 auto const doy =
static_cast<std::uint_least32_t
>(
103 ( 153 * (
static_cast<std::int_least32_t
>( m ) +
104 (
static_cast<std::int_least32_t
>( m ) > 2 ? -3 : 9 ) ) +
107 static_cast<std::int_least32_t
>( d ) - 1 );
108 std::uint_least32_t
const doe =
109 yoe * 365 + yoe / 4 - yoe / 100 + doy;
110 std::int_least32_t
const days_since_epoch =
111 era * 146097 +
static_cast<std::int_least32_t
>( doe ) - 719468;
114 std::chrono::duration<std::int_least32_t, std::ratio<86400>>;
115 return std::chrono::time_point<std::chrono::system_clock,
116 std::chrono::milliseconds>{ } +
117 ( Days( days_since_epoch ) + std::chrono::hours( h ) +
118 std::chrono::minutes( min ) +
119 std::chrono::seconds(
120 static_cast<std::uint_least32_t
>( s ) ) +
121 std::chrono::milliseconds( mil ) );
128 auto result = calc( yr, mo, dy, hr, mn, se, ms );
129 #if false and defined( __cpp_lib_chrono ) and __cpp_lib_chrono >= 201907
131 return std::chrono::duration_cast<Duration>(
132 std::chrono::clock_cast<Clock>( result ) );
134 if constexpr( std::is_same<Clock, std::chrono::system_clock>::value ) {
140 auto const system_epoch = std::chrono::floor<std::chrono::hours>(
141 std::chrono::system_clock::now( ).time_since_epoch( ) +
142 std::chrono::minutes( 30 ) );
143 auto const clock_epoch = std::chrono::floor<std::chrono::hours>(
144 Clock::now( ).time_since_epoch( ) + std::chrono::minutes( 30 ) );
146 constexpr
auto offset =
147 std::chrono::duration_cast<std::chrono::milliseconds>(
148 clock_epoch - system_epoch );
149 return std::chrono::duration_cast<Duration>( result + offset );
160 template<
typename Bounds, std::ptrdiff_t Ex>
162 daw::basic_string_view<char, Bounds, Ex> timestamp_str ) {
164 result.
day = parse_utils::parse_unsigned<std::uint_least32_t, 2>(
165 std::data( timestamp_str.pop_back( 2U ) ) );
167 timestamp_str.remove_suffix( );
169 result.month = parse_utils::parse_unsigned<std::uint_least32_t, 2>(
170 std::data( timestamp_str.pop_back( 2U ) ) );
172 timestamp_str.remove_suffix( );
175 datetime_details::parse_number<std::int_least32_t>( timestamp_str );
186 template<
typename Bounds, std::ptrdiff_t Ex>
188 daw::basic_string_view<char, Bounds, Ex> timestamp_str ) {
190 result.
hour = parse_utils::parse_unsigned<std::uint_least32_t, 2>(
191 std::data( timestamp_str.pop_front( 2 ) ) );
193 timestamp_str.remove_prefix( );
195 result.minute = parse_utils::parse_unsigned<std::uint_least32_t, 2>(
196 std::data( timestamp_str.pop_front( 2 ) ) );
197 if( timestamp_str.empty( ) ) {
201 timestamp_str.remove_prefix( );
203 result.second = parse_utils::parse_unsigned<std::uint_least32_t, 2>(
204 std::data( timestamp_str.pop_front( 2 ) ) );
205 if( timestamp_str.empty( ) ) {
209 timestamp_str.remove_prefix( );
212 datetime_details::parse_number<std::uint_least32_t>(
213 timestamp_str.pop_front( 3 ) );
217 template<
typename Bounds, std::ptrdiff_t Ex>
218 constexpr std::chrono::time_point<std::chrono::system_clock,
219 std::chrono::milliseconds>
221 constexpr daw::string_view t_str =
"T";
222 auto const date_str = ts.pop_front( t_str );
225 ErrorReason::InvalidTimestamp );
230 auto time_str = ts.pop_front( [](
char c ) {
236 if( not( ts.empty( ) or ts.front( ) ==
'Z' ) ) {
238 ErrorReason::InvalidTimestamp );
240 bool const sign = ts.front( ) ==
'+';
242 auto hr_offset = parse_utils::parse_unsigned<std::uint_least32_t, 2>(
244 if( ts.front( ) ==
':' ) {
247 auto mn_offset = parse_utils::parse_unsigned<std::uint_least32_t, 2>(
252 hms.
hour -= hr_offset;
256 hms.
hour += hr_offset;
273 template<
typename Clock,
typename Duration>
275 std::chrono::time_point<Clock, Duration>
const &tp ) {
276 auto dur_from_epoch = tp.time_since_epoch( );
278 std::chrono::duration<std::int_least32_t, std::ratio<86400>>;
279 auto const days_since_epoch =
280 std::chrono::duration_cast<Days>( dur_from_epoch );
281 std::int_least32_t z = days_since_epoch.count( );
283 std::int_least32_t
const era = ( z >= 0 ? z : z - 146096 ) / 146097;
285 static_cast<std::uint_least32_t
>( z - era * 146097 );
286 std::uint_least32_t
const yoe =
287 ( doe - doe / 1460 + doe / 36524 - doe / 146096 ) / 365;
288 std::int_least32_t
const y =
289 static_cast<std::int_least32_t
>( yoe ) + era * 400;
290 std::uint_least32_t
const doy =
291 doe - ( 365 * yoe + yoe / 4 - yoe / 100 );
292 std::uint_least32_t
const mp = ( 5 * doy + 2 ) / 153;
293 std::uint_least32_t
const d = doy - ( 153 * mp + 2 ) / 5 + 1;
294 auto const m =
static_cast<std::uint_least32_t
>(
295 static_cast<std::int_least32_t
>( mp ) +
296 (
static_cast<std::int_least32_t
>( mp ) < 10 ? 3 : -9 ) );
298 dur_from_epoch -= days_since_epoch;
300 std::chrono::duration_cast<std::chrono::hours>( dur_from_epoch );
301 dur_from_epoch -= hrs;
303 std::chrono::duration_cast<std::chrono::minutes>( dur_from_epoch );
304 dur_from_epoch -= min;
306 std::chrono::duration_cast<std::chrono::seconds>( dur_from_epoch );
307 dur_from_epoch -= sec;
308 auto const ms = std::chrono::duration_cast<std::chrono::milliseconds>(
310 return ymdhms{ y + ( m <= 2 ),
313 static_cast<std::uint_least32_t
>( hrs.count( ) ),
314 static_cast<std::uint_least32_t
>( min.count( ) ),
315 static_cast<std::uint_least32_t
>( sec.count( ) ),
316 static_cast<std::uint_least32_t
>( ms.count( ) ) };
352 template<
typename Duration>
354 std::chrono::time_point<std::chrono::system_clock, Duration> tp ) {
355 using days = std::chrono::duration<long, std::ratio<86400>>;
357 std::chrono::duration_cast<days>( tp.time_since_epoch( ) ).count( );
358 auto const dow = z >= -4L ? ( z + 4L ) % 7L : ( z + 5L ) % 7L + 6L;
380 std::chrono::time_point<std::chrono::system_clock,
381 std::chrono::milliseconds>( ) ) ==
"Thu" );
383 namespace datetime_details {
384 constexpr std::uint_least32_t
month2num( std::string_view ts ) {
386 ErrorReason::InvalidTimestamp );
387 auto const b0 =
static_cast<std::uint_least32_t
>(
388 static_cast<unsigned char>( ts[0] ) );
389 auto const b1 =
static_cast<std::uint_least32_t
>(
390 static_cast<unsigned char>( ts[1] ) );
391 auto const b2 =
static_cast<std::uint_least32_t
>(
392 static_cast<unsigned char>( ts[2] ) );
393 return ( b0 << 16U ) | ( b1 << 8U ) | b2;
#define daw_json_assert(Bool,...)
Definition: daw_json_assert.h:178
constexpr Result parse_number(daw::basic_string_view< char, Bounds, Ex > sv)
Definition: daw_json_parse_iso8601_utils.h:62
constexpr std::uint_least32_t month2num(std::string_view ts)
Definition: daw_json_parse_iso8601_utils.h:384
constexpr time_parts parse_iso_8601_time(daw::basic_string_view< char, Bounds, Ex > timestamp_str)
Definition: daw_json_parse_iso8601_utils.h:187
constexpr date_parts parse_iso_8601_date(daw::basic_string_view< char, Bounds, Ex > timestamp_str)
Definition: daw_json_parse_iso8601_utils.h:161
constexpr unsigned parse_short_month(std::string_view ts)
Definition: daw_json_parse_iso8601_utils.h:397
constexpr ymdhms time_point_to_civil(std::chrono::time_point< Clock, Duration > const &tp)
Definition: daw_json_parse_iso8601_utils.h:274
constexpr std::chrono::time_point< Clock, Duration > civil_to_time_point(std::int_least32_t yr, std::uint_least32_t mo, std::uint_least32_t dy, std::uint_least32_t hr, std::uint_least32_t mn, std::uint_least32_t se, std::uint_least32_t ms)
Definition: daw_json_parse_iso8601_utils.h:89
constexpr std::string_view short_day_of_week(std::chrono::time_point< std::chrono::system_clock, Duration > tp)
Definition: daw_json_parse_iso8601_utils.h:353
constexpr std::chrono::time_point< std::chrono::system_clock, std::chrono::milliseconds > parse_iso8601_timestamp(daw::basic_string_view< char, Bounds, Ex > ts)
Definition: daw_json_parse_iso8601_utils.h:220
constexpr std::string_view month_short_name(unsigned m)
Definition: daw_json_parse_iso8601_utils.h:319
static constexpr DAW_ATTRIB_FLATINLINE unsigned parse_digit(char c)
Definition: daw_json_parse_digit.h:19
constexpr Result parse_unsigned2(char const *digit_str)
Definition: daw_json_parse_iso8601_utils.h:40
constexpr Result parse_unsigned(char const *digit_str)
Definition: daw_json_parse_iso8601_utils.h:30
constexpr bool is_number(char c)
Definition: daw_json_parse_iso8601_utils.h:52
DAW_ATTRIB_NOINLINE void daw_json_error(ErrorReason reason)
Definition: daw_json_assert.h:39
Definition: daw_from_json.h:22
Definition: daw_json_parse_iso8601_utils.h:154
uint_least32_t month
Definition: daw_json_parse_iso8601_utils.h:156
uint_least32_t day
Definition: daw_json_parse_iso8601_utils.h:157
int_least32_t year
Definition: daw_json_parse_iso8601_utils.h:155
Definition: daw_json_parse_iso8601_utils.h:179
uint_least32_t hour
Definition: daw_json_parse_iso8601_utils.h:180
uint_least32_t second
Definition: daw_json_parse_iso8601_utils.h:182
uint_least32_t millisecond
Definition: daw_json_parse_iso8601_utils.h:183
uint_least32_t minute
Definition: daw_json_parse_iso8601_utils.h:181
Definition: daw_json_parse_iso8601_utils.h:263
std::int_least32_t year
Definition: daw_json_parse_iso8601_utils.h:264
std::uint_least32_t second
Definition: daw_json_parse_iso8601_utils.h:269
std::uint_least32_t month
Definition: daw_json_parse_iso8601_utils.h:265
std::uint_least32_t hour
Definition: daw_json_parse_iso8601_utils.h:267
std::uint_least32_t day
Definition: daw_json_parse_iso8601_utils.h:266
std::uint_least32_t minute
Definition: daw_json_parse_iso8601_utils.h:268
std::uint_least32_t millisecond
Definition: daw_json_parse_iso8601_utils.h:270
#define DAW_JSON_VER
Definition: version.h:11