diff options
Diffstat (limited to 'absl/time/internal/cctz/src/time_zone_info.cc')
| -rw-r--r-- | absl/time/internal/cctz/src/time_zone_info.cc | 93 |
1 files changed, 38 insertions, 55 deletions
diff --git a/absl/time/internal/cctz/src/time_zone_info.cc b/absl/time/internal/cctz/src/time_zone_info.cc index d3e1ae29bb5b..971542d0754c 100644 --- a/absl/time/internal/cctz/src/time_zone_info.cc +++ b/absl/time/internal/cctz/src/time_zone_info.cc @@ -45,11 +45,13 @@ #include <sstream> #include <string> +#include "absl/base/config.h" #include "absl/time/internal/cctz/include/cctz/civil_time.h" #include "time_zone_fixed.h" #include "time_zone_posix.h" namespace absl { +ABSL_NAMESPACE_BEGIN namespace time_internal { namespace cctz { @@ -65,8 +67,8 @@ const std::int_least32_t kDaysPerYear[2] = {365, 366}; // The day offsets of the beginning of each (1-based) month in non-leap and // leap years respectively (e.g., 335 days before December in a leap year). const std::int_least16_t kMonthOffsets[2][1 + 12 + 1] = { - {-1, 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365}, - {-1, 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366}, + {-1, 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365}, + {-1, 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366}, }; // We reject leap-second encoded zoneinfo and so assume 60-second minutes. @@ -77,8 +79,8 @@ const std::int_least64_t kSecsPer400Years = 146097LL * kSecsPerDay; // Like kDaysPerYear[] but scaled up by a factor of kSecsPerDay. const std::int_least32_t kSecsPerYear[2] = { - 365 * kSecsPerDay, - 366 * kSecsPerDay, + 365 * kSecsPerDay, + 366 * kSecsPerDay, }; // Single-byte, unsigned numeric values are encoded directly. @@ -172,8 +174,8 @@ inline time_zone::civil_lookup MakeRepeated(const Transition& tr, } inline civil_second YearShift(const civil_second& cs, year_t shift) { - return civil_second(cs.year() + shift, cs.month(), cs.day(), - cs.hour(), cs.minute(), cs.second()); + return civil_second(cs.year() + shift, cs.month(), cs.day(), cs.hour(), + cs.minute(), cs.second()); } } // namespace @@ -216,7 +218,7 @@ bool TimeZoneInfo::ResetToBuiltinUTC(const seconds& offset) { default_transition_type_ = 0; abbreviations_ = FixedOffsetToAbbr(offset); abbreviations_.append(1, '\0'); // add NUL - future_spec_.clear(); // never needed for a fixed-offset zone + future_spec_.clear(); // never needed for a fixed-offset zone extended_ = false; tt.civil_max = LocalTime(seconds::max().count(), tt).cs; @@ -393,31 +395,24 @@ void TimeZoneInfo::ExtendTransitions(const std::string& name, bool TimeZoneInfo::Load(const std::string& name, ZoneInfoSource* zip) { // Read and validate the header. tzhead tzh; - if (zip->Read(&tzh, sizeof(tzh)) != sizeof(tzh)) - return false; + if (zip->Read(&tzh, sizeof(tzh)) != sizeof(tzh)) return false; if (strncmp(tzh.tzh_magic, TZ_MAGIC, sizeof(tzh.tzh_magic)) != 0) return false; Header hdr; - if (!hdr.Build(tzh)) - return false; + if (!hdr.Build(tzh)) return false; std::size_t time_len = 4; if (tzh.tzh_version[0] != '\0') { // Skip the 4-byte data. - if (zip->Skip(hdr.DataLength(time_len)) != 0) - return false; + if (zip->Skip(hdr.DataLength(time_len)) != 0) return false; // Read and validate the header for the 8-byte data. - if (zip->Read(&tzh, sizeof(tzh)) != sizeof(tzh)) - return false; + if (zip->Read(&tzh, sizeof(tzh)) != sizeof(tzh)) return false; if (strncmp(tzh.tzh_magic, TZ_MAGIC, sizeof(tzh.tzh_magic)) != 0) return false; - if (tzh.tzh_version[0] == '\0') - return false; - if (!hdr.Build(tzh)) - return false; + if (tzh.tzh_version[0] == '\0') return false; + if (!hdr.Build(tzh)) return false; time_len = 8; } - if (hdr.typecnt == 0) - return false; + if (hdr.typecnt == 0) return false; if (hdr.leapcnt != 0) { // This code assumes 60-second minutes so we do not want // the leap-second encoded zoneinfo. We could reverse the @@ -425,16 +420,13 @@ bool TimeZoneInfo::Load(const std::string& name, ZoneInfoSource* zip) { // so currently we simply reject such data. return false; } - if (hdr.ttisstdcnt != 0 && hdr.ttisstdcnt != hdr.typecnt) - return false; - if (hdr.ttisutcnt != 0 && hdr.ttisutcnt != hdr.typecnt) - return false; + if (hdr.ttisstdcnt != 0 && hdr.ttisstdcnt != hdr.typecnt) return false; + if (hdr.ttisutcnt != 0 && hdr.ttisutcnt != hdr.typecnt) return false; // Read the data into a local buffer. std::size_t len = hdr.DataLength(time_len); std::vector<char> tbuf(len); - if (zip->Read(tbuf.data(), len) != len) - return false; + if (zip->Read(tbuf.data(), len) != len) return false; const char* bp = tbuf.data(); // Decode and validate the transitions. @@ -452,10 +444,8 @@ bool TimeZoneInfo::Load(const std::string& name, ZoneInfoSource* zip) { bool seen_type_0 = false; for (std::size_t i = 0; i != hdr.timecnt; ++i) { transitions_[i].type_index = Decode8(bp++); - if (transitions_[i].type_index >= hdr.typecnt) - return false; - if (transitions_[i].type_index == 0) - seen_type_0 = true; + if (transitions_[i].type_index >= hdr.typecnt) return false; + if (transitions_[i].type_index == 0) seen_type_0 = true; } // Decode and validate the transition types. @@ -469,8 +459,7 @@ bool TimeZoneInfo::Load(const std::string& name, ZoneInfoSource* zip) { bp += 4; transition_types_[i].is_dst = (Decode8(bp++) != 0); transition_types_[i].abbr_index = Decode8(bp++); - if (transition_types_[i].abbr_index >= hdr.charcnt) - return false; + if (transition_types_[i].abbr_index >= hdr.charcnt) return false; } // Determine the before-first-transition type. @@ -479,13 +468,10 @@ bool TimeZoneInfo::Load(const std::string& name, ZoneInfoSource* zip) { std::uint_fast8_t index = 0; if (transition_types_[0].is_dst) { index = transitions_[0].type_index; - while (index != 0 && transition_types_[index].is_dst) - --index; + while (index != 0 && transition_types_[index].is_dst) --index; } - while (index != hdr.typecnt && transition_types_[index].is_dst) - ++index; - if (index != hdr.typecnt) - default_transition_type_ = index; + while (index != hdr.typecnt && transition_types_[index].is_dst) ++index; + if (index != hdr.typecnt) default_transition_type_ = index; } // Copy all the abbreviations. @@ -509,11 +495,9 @@ bool TimeZoneInfo::Load(const std::string& name, ZoneInfoSource* zip) { unsigned char ch; // all non-EOF results are positive return (azip->Read(&ch, 1) == 1) ? ch : EOF; }; - if (get_char(zip) != '\n') - return false; + if (get_char(zip) != '\n') return false; for (int c = get_char(zip); c != '\n'; c = get_char(zip)) { - if (c == EOF) - return false; + if (c == EOF) return false; future_spec_.push_back(static_cast<char>(c)); } } @@ -624,7 +608,7 @@ class FileZoneInfoSource : public ZoneInfoSource { : fp_(fp, fclose), len_(len) {} private: - std::unique_ptr<FILE, int(*)(FILE*)> fp_; + std::unique_ptr<FILE, int (*)(FILE*)> fp_; std::size_t len_; }; @@ -748,13 +732,13 @@ time_zone::absolute_lookup TimeZoneInfo::LocalTime( // A civil time in "+offset" looks like (time+offset) in UTC. // Note: We perform two additions in the civil_second domain to // sidestep the chance of overflow in (unix_time + tt.utc_offset). - return {(civil_second() + unix_time) + tt.utc_offset, - tt.utc_offset, tt.is_dst, &abbreviations_[tt.abbr_index]}; + return {(civil_second() + unix_time) + tt.utc_offset, tt.utc_offset, + tt.is_dst, &abbreviations_[tt.abbr_index]}; } // BreakTime() translation for a particular transition. -time_zone::absolute_lookup TimeZoneInfo::LocalTime( - std::int_fast64_t unix_time, const Transition& tr) const { +time_zone::absolute_lookup TimeZoneInfo::LocalTime(std::int_fast64_t unix_time, + const Transition& tr) const { const TransitionType& tt = transition_types_[tr.type_index]; // Note: (unix_time - tr.unix_time) will never overflow as we // have ensured that there is always a "nearby" transition. @@ -897,9 +881,7 @@ time_zone::civil_lookup TimeZoneInfo::MakeTime(const civil_second& cs) const { return MakeUnique(tr->unix_time + (cs - tr->civil_sec)); } -std::string TimeZoneInfo::Version() const { - return version_; -} +std::string TimeZoneInfo::Version() const { return version_; } std::string TimeZoneInfo::Description() const { std::ostringstream oss; @@ -921,8 +903,8 @@ bool TimeZoneInfo::NextTransition(const time_point<seconds>& tp, } std::int_fast64_t unix_time = ToUnixSeconds(tp); const Transition target = {unix_time, 0, civil_second(), civil_second()}; - const Transition* tr = std::upper_bound(begin, end, target, - Transition::ByUnixTime()); + const Transition* tr = + std::upper_bound(begin, end, target, Transition::ByUnixTime()); for (; tr != end; ++tr) { // skip no-op transitions std::uint_fast8_t prev_type_index = (tr == begin) ? default_transition_type_ : tr[-1].type_index; @@ -956,8 +938,8 @@ bool TimeZoneInfo::PrevTransition(const time_point<seconds>& tp, unix_time += 1; // ceils } const Transition target = {unix_time, 0, civil_second(), civil_second()}; - const Transition* tr = std::lower_bound(begin, end, target, - Transition::ByUnixTime()); + const Transition* tr = + std::lower_bound(begin, end, target, Transition::ByUnixTime()); for (; tr != begin; --tr) { // skip no-op transitions std::uint_fast8_t prev_type_index = (tr - 1 == begin) ? default_transition_type_ : tr[-2].type_index; @@ -972,4 +954,5 @@ bool TimeZoneInfo::PrevTransition(const time_point<seconds>& tp, } // namespace cctz } // namespace time_internal +ABSL_NAMESPACE_END } // namespace absl |