diff options
Diffstat (limited to 'abseil-cpp/absl/time/internal/cctz/include/cctz/civil_time_detail.h')
-rw-r--r-- | abseil-cpp/absl/time/internal/cctz/include/cctz/civil_time_detail.h | 36 |
1 files changed, 18 insertions, 18 deletions
diff --git a/abseil-cpp/absl/time/internal/cctz/include/cctz/civil_time_detail.h b/abseil-cpp/absl/time/internal/cctz/include/cctz/civil_time_detail.h index d1b4222..a5b084e 100644 --- a/abseil-cpp/absl/time/internal/cctz/include/cctz/civil_time_detail.h +++ b/abseil-cpp/absl/time/internal/cctz/include/cctz/civil_time_detail.h @@ -84,14 +84,13 @@ CONSTEXPR_F bool is_leap_year(year_t y) noexcept { return y % 4 == 0 && (y % 100 != 0 || y % 400 == 0); } CONSTEXPR_F int year_index(year_t y, month_t m) noexcept { - return (static_cast<int>((y + (m > 2)) % 400) + 400) % 400; + const int yi = static_cast<int>((y + (m > 2)) % 400); + return yi < 0 ? yi + 400 : yi; } -CONSTEXPR_F int days_per_century(year_t y, month_t m) noexcept { - const int yi = year_index(y, m); +CONSTEXPR_F int days_per_century(int yi) noexcept { return 36524 + (yi == 0 || yi > 300); } -CONSTEXPR_F int days_per_4years(year_t y, month_t m) noexcept { - const int yi = year_index(y, m); +CONSTEXPR_F int days_per_4years(int yi) noexcept { return 1460 + (yi == 0 || yi > 300 || (yi - 1) % 100 < 96); } CONSTEXPR_F int days_per_year(year_t y, month_t m) noexcept { @@ -133,17 +132,22 @@ CONSTEXPR_F fields n_day(year_t y, month_t m, diff_t d, diff_t cd, hour_t hh, } } if (d > 365) { + int yi = year_index(ey, m); // Index into Gregorian 400 year cycle. for (;;) { - int n = days_per_century(ey, m); + int n = days_per_century(yi); if (d <= n) break; d -= n; ey += 100; + yi += 100; + if (yi >= 400) yi -= 400; } for (;;) { - int n = days_per_4years(ey, m); + int n = days_per_4years(yi); if (d <= n) break; d -= n; ey += 4; + yi += 4; + if (yi >= 400) yi -= 400; } for (;;) { int n = days_per_year(ey, m); @@ -416,16 +420,10 @@ class civil_time { // Assigning arithmetic. CONSTEXPR_M civil_time& operator+=(diff_t n) noexcept { - f_ = step(T{}, f_, n); - return *this; + return *this = *this + n; } CONSTEXPR_M civil_time& operator-=(diff_t n) noexcept { - if (n != (std::numeric_limits<diff_t>::min)()) { - f_ = step(T{}, f_, -n); - } else { - f_ = step(T{}, step(T{}, f_, -(n + 1)), 1); - } - return *this; + return *this = *this - n; } CONSTEXPR_M civil_time& operator++() noexcept { return *this += 1; } CONSTEXPR_M civil_time operator++(int) noexcept { @@ -442,13 +440,15 @@ class civil_time { // Binary arithmetic operators. friend CONSTEXPR_F civil_time operator+(civil_time a, diff_t n) noexcept { - return a += n; + return civil_time(step(T{}, a.f_, n)); } friend CONSTEXPR_F civil_time operator+(diff_t n, civil_time a) noexcept { - return a += n; + return a + n; } friend CONSTEXPR_F civil_time operator-(civil_time a, diff_t n) noexcept { - return a -= n; + return n != (std::numeric_limits<diff_t>::min)() + ? civil_time(step(T{}, a.f_, -n)) + : civil_time(step(T{}, step(T{}, a.f_, -(n + 1)), 1)); } friend CONSTEXPR_F diff_t operator-(civil_time lhs, civil_time rhs) noexcept { return difference(T{}, lhs.f_, rhs.f_); |