diff options
Diffstat (limited to 'absl/time/internal/cctz/include')
| -rw-r--r-- | absl/time/internal/cctz/include/cctz/civil_time_detail.h | 42 | ||||
| -rw-r--r-- | absl/time/internal/cctz/include/cctz/time_zone.h | 4 |
2 files changed, 29 insertions, 17 deletions
diff --git a/absl/time/internal/cctz/include/cctz/civil_time_detail.h b/absl/time/internal/cctz/include/cctz/civil_time_detail.h index 4cde96f1aaf1..d1b4222b1f43 100644 --- a/absl/time/internal/cctz/include/cctz/civil_time_detail.h +++ b/absl/time/internal/cctz/include/cctz/civil_time_detail.h @@ -106,54 +106,64 @@ CONSTEXPR_F int days_per_month(year_t y, month_t m) noexcept { CONSTEXPR_F fields n_day(year_t y, month_t m, diff_t d, diff_t cd, hour_t hh, minute_t mm, second_t ss) noexcept { - y += (cd / 146097) * 400; + year_t ey = y % 400; + const year_t oey = ey; + ey += (cd / 146097) * 400; cd %= 146097; if (cd < 0) { - y -= 400; + ey -= 400; cd += 146097; } - y += (d / 146097) * 400; + ey += (d / 146097) * 400; d = d % 146097 + cd; if (d > 0) { if (d > 146097) { - y += 400; + ey += 400; d -= 146097; } } else { if (d > -365) { // We often hit the previous year when stepping a civil time backwards, // so special case it to avoid counting up by 100/4/1-year chunks. - y -= 1; - d += days_per_year(y, m); + ey -= 1; + d += days_per_year(ey, m); } else { - y -= 400; + ey -= 400; d += 146097; } } if (d > 365) { - for (int n = days_per_century(y, m); d > n; n = days_per_century(y, m)) { + for (;;) { + int n = days_per_century(ey, m); + if (d <= n) break; d -= n; - y += 100; + ey += 100; } - for (int n = days_per_4years(y, m); d > n; n = days_per_4years(y, m)) { + for (;;) { + int n = days_per_4years(ey, m); + if (d <= n) break; d -= n; - y += 4; + ey += 4; } - for (int n = days_per_year(y, m); d > n; n = days_per_year(y, m)) { + for (;;) { + int n = days_per_year(ey, m); + if (d <= n) break; d -= n; - ++y; + ++ey; } } if (d > 28) { - for (int n = days_per_month(y, m); d > n; n = days_per_month(y, m)) { + for (;;) { + int n = days_per_month(ey, m); + if (d <= n) break; d -= n; if (++m > 12) { - ++y; + ++ey; m = 1; } } } - return fields(y, m, static_cast<day_t>(d), hh, mm, ss); + return fields(y + (ey - oey), m, static_cast<day_t>(d), hh, mm, ss); } CONSTEXPR_F fields n_mon(year_t y, diff_t m, diff_t d, diff_t cd, hour_t hh, minute_t mm, second_t ss) noexcept { diff --git a/absl/time/internal/cctz/include/cctz/time_zone.h b/absl/time/internal/cctz/include/cctz/time_zone.h index d4ea90ef7eb5..5562a37bc807 100644 --- a/absl/time/internal/cctz/include/cctz/time_zone.h +++ b/absl/time/internal/cctz/include/cctz/time_zone.h @@ -292,6 +292,7 @@ bool parse(const std::string&, const std::string&, const time_zone&, // - %E#f - Fractional seconds with # digits of precision // - %E*f - Fractional seconds with full precision (a literal '*') // - %E4Y - Four-character years (-999 ... -001, 0000, 0001 ... 9999) +// - %ET - The RFC3339 "date-time" separator "T" // // Note that %E0S behaves like %S, and %E0f produces no characters. In // contrast %E*f always produces at least one digit, which may be '0'. @@ -321,7 +322,8 @@ inline std::string format(const std::string& fmt, const time_point<D>& tp, // returns the corresponding time_point. Uses strftime()-like formatting // options, with the same extensions as cctz::format(), but with the // exceptions that %E#S is interpreted as %E*S, and %E#f as %E*f. %Ez -// and %E*z also accept the same inputs. +// and %E*z also accept the same inputs, which (along with %z) includes +// 'z' and 'Z' as synonyms for +00:00. %ET accepts either 'T' or 't'. // // %Y consumes as many numeric characters as it can, so the matching data // should always be terminated with a non-numeric. %E4Y always consumes |