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90 lines
4.7 KiB
Plaintext
90 lines
4.7 KiB
Plaintext
module std::time::datetime @if(env::LIBC);
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enum DateTimeFormat
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{
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ANSIC, // "Mon Jan _2 15:04:05 2006"
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UNIXDATE, // "Mon Jan _2 15:04:05 GMT 2006"
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RUBYDATE, // "Mon Jan 02 15:04:05 -0700 2006"
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RFC822, // "02 Jan 06 15:04 GMT"
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RFC822Z, // "02 Jan 06 15:04 -0700"
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RFC850, // "Monday, 02-Jan-06 15:04:05 GMT"
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RFC1123, // "Mon, 02 Jan 2006 15:04:05 GMT"
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RFC1123Z, // "Mon, 02 Jan 2006 15:04:05 -0700"
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RFC3339, // "2006-01-02T15:04:05Z"
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RFC3339Z, // "2006-01-02T15:04:05+07:00"
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RFC3339MS, // "2006-01-02T15:04:05.999999Z"
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RFC3339ZMS, // "2006-01-02T15:04:05.999999+07:00"
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DATETIME, // "2006-01-02 15:04:05"
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DATEONLY, // "2006-01-02"
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TIMEONLY, // "15:04:05"
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}
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fn String format(Allocator allocator, DateTimeFormat type, TzDateTime dt)
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{
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switch (type)
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{
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case ANSIC:
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return string::format(allocator, "%s %s %2d %02d:%02d:%02d %04d", dt.weekday.abbrev, dt.month.abbrev, dt.day, dt.hour, dt.min, dt.sec, dt.year);
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case UNIXDATE:
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return string::format(allocator, "%s %s %2d %02d:%02d:%02d GMT %04d", dt.weekday.abbrev, dt.month.abbrev, dt.day, dt.hour, dt.min, dt.sec, dt.year);
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case RUBYDATE:
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return string::format(allocator, "%s %s %2d %02d:%02d:%02d %s %04d", dt.weekday.abbrev, dt.month.abbrev, dt.day, dt.hour, dt.min, dt.sec, temp_numeric_tzsuffix(dt.gmt_offset), dt.year);
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case RFC822:
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dt = dt.to_gmt_offset(0); // For named representations of the timezone we always go for GMT, which is required by some RFCs
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return string::format(allocator, "%02d %s %02d %02d:%02d GMT", dt.day, dt.month.abbrev, dt.year % 100, dt.hour, dt.min);
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case RFC822Z:
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return string::format(allocator, "%02d %s %02d %02d:%02d %s", dt.day, dt.month.abbrev, dt.year % 100, dt.hour, dt.min, temp_numeric_tzsuffix(dt.gmt_offset));
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case RFC850:
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dt = dt.to_gmt_offset(0); // For named representations of the timezone we always go for GMT, which is required by some RFCs
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return string::format(allocator, "%s, %02d-%s-%02d %02d:%02d:%02d GMT", dt.weekday.name, dt.day, dt.month.abbrev, dt.year % 100, dt.hour, dt.min, dt.sec);
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case RFC1123:
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dt = dt.to_gmt_offset(0); // For named representations of the timezone we always go for GMT, which is required by some RFCs
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return string::format(allocator, "%s, %02d %s %d %02d:%02d:%02d GMT", dt.weekday.abbrev, dt.day, dt.month.abbrev, dt.year, dt.hour, dt.min, dt.sec);
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case RFC1123Z:
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return string::format(allocator, "%s, %02d %s %d %02d:%02d:%02d %s", dt.weekday.abbrev, dt.day, dt.month.abbrev, dt.year, dt.hour, dt.min, dt.sec, temp_numeric_tzsuffix(dt.gmt_offset));
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case RFC3339:
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dt = dt.to_gmt_offset(0);
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return string::format(allocator, "%04d-%02d-%02dT%02d:%02d:%02dZ", dt.year, dt.month + 1, dt.day, dt.hour, dt.min, dt.sec);
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case RFC3339Z:
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return string::format(allocator, "%04d-%02d-%02dT%02d:%02d:%02d%s", dt.year, dt.month + 1, dt.day, dt.hour, dt.min, dt.sec, temp_numeric_tzsuffix_colon(dt.gmt_offset));
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case RFC3339MS:
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dt = dt.to_gmt_offset(0);
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return string::format(allocator, "%04d-%02d-%02dT%02d:%02d:%02d.%dZ", dt.year, dt.month + 1, dt.day, dt.hour, dt.min, dt.sec, dt.usec);
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case RFC3339ZMS:
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return string::format(allocator, "%04d-%02d-%02dT%02d:%02d:%02d.%d%s", dt.year, dt.month + 1, dt.day, dt.hour, dt.min, dt.sec, dt.usec, temp_numeric_tzsuffix_colon(dt.gmt_offset));
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case DATETIME:
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return string::format(allocator, "%04d-%02d-%02d %02d:%02d:%02d", dt.year, dt.month + 1, dt.day, dt.hour, dt.min, dt.sec);
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case DATEONLY:
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return string::format(allocator, "%04d-%02d-%02d", dt.year, dt.month + 1, dt.day);
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case TIMEONLY:
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return string::format(allocator, "%02d:%02d:%02d", dt.hour, dt.min, dt.sec);
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}
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}
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fn String tformat(DateTimeFormat dt_format, TzDateTime dt) => format(tmem(), dt_format, dt);
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fn String TzDateTime.format(self, Allocator allocator, DateTimeFormat dt_format) => format(allocator, dt_format, self);
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// .with_gmt_offset(0) instead of .to_local() is used to avoid surprises when user is formatting to a representation without a timezone
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fn String DateTime.format(self, Allocator allocator, DateTimeFormat dt_format) => format(allocator, dt_format, self.with_gmt_offset(0));
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<*
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Returns the timezone offset in the format of "+HHMM" or "-HHMM"
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@require gmt_offset >= -12 * 3600 && gmt_offset <= 14 * 3600
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*>
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fn String temp_numeric_tzsuffix(int gmt_offset) @private @inline
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{
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if (gmt_offset == 0) return "-0000";
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return string::tformat("%+03d%02d", gmt_offset / 3600, (gmt_offset % 3600) / 60);
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}
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<*
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Returns the timezone offset in the format of "+HH:MM" or "-HH:MM"
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@require gmt_offset >= -12 * 3600 && gmt_offset <= 14 * 3600
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*>
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fn String temp_numeric_tzsuffix_colon(int gmt_offset) @private @inline
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{
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if (gmt_offset == 0) return "-00:00";
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return string::tformat("%+03d:%02d", gmt_offset / 3600, (gmt_offset % 3600) / 60);
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} |