From 5aa5d282eac56a21e74611c1cdbaa97bb5db2dca Mon Sep 17 00:00:00 2001 From: Vincent Ambo Date: Tue, 8 Feb 2022 02:05:36 +0300 Subject: chore(3p/abseil_cpp): unvendor abseil_cpp we weren't actually using these sources anymore, okay? Change-Id: If701571d9716de308d3512e1eb22c35db0877a66 Reviewed-on: https://cl.tvl.fyi/c/depot/+/5248 Tested-by: BuildkiteCI Reviewed-by: grfn Autosubmit: tazjin --- .../time/internal/cctz/src/time_zone_format.cc | 1029 -------------------- 1 file changed, 1029 deletions(-) delete mode 100644 third_party/abseil_cpp/absl/time/internal/cctz/src/time_zone_format.cc (limited to 'third_party/abseil_cpp/absl/time/internal/cctz/src/time_zone_format.cc') diff --git a/third_party/abseil_cpp/absl/time/internal/cctz/src/time_zone_format.cc b/third_party/abseil_cpp/absl/time/internal/cctz/src/time_zone_format.cc deleted file mode 100644 index d8cb047425ee..000000000000 --- a/third_party/abseil_cpp/absl/time/internal/cctz/src/time_zone_format.cc +++ /dev/null @@ -1,1029 +0,0 @@ -// Copyright 2016 Google Inc. All Rights Reserved. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#if !defined(HAS_STRPTIME) -#if !defined(_MSC_VER) && !defined(__MINGW32__) -#define HAS_STRPTIME 1 // assume everyone has strptime() except windows -#endif -#endif - -#if defined(HAS_STRPTIME) && HAS_STRPTIME -#if !defined(_XOPEN_SOURCE) -#define _XOPEN_SOURCE // Definedness suffices for strptime. -#endif -#endif - -#include "absl/base/config.h" -#include "absl/time/internal/cctz/include/cctz/time_zone.h" - -// Include time.h directly since, by C++ standards, ctime doesn't have to -// declare strptime. -#include - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#if !HAS_STRPTIME -#include -#include -#endif - -#include "absl/time/internal/cctz/include/cctz/civil_time.h" -#include "time_zone_if.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace time_internal { -namespace cctz { -namespace detail { - -namespace { - -#if !HAS_STRPTIME -// Build a strptime() using C++11's std::get_time(). -char* strptime(const char* s, const char* fmt, std::tm* tm) { - std::istringstream input(s); - input >> std::get_time(tm, fmt); - if (input.fail()) return nullptr; - return const_cast(s) + - (input.eof() ? strlen(s) : static_cast(input.tellg())); -} -#endif - -// Convert a cctz::weekday to a tm_wday value (0-6, Sunday = 0). -int ToTmWday(weekday wd) { - switch (wd) { - case weekday::sunday: - return 0; - case weekday::monday: - return 1; - case weekday::tuesday: - return 2; - case weekday::wednesday: - return 3; - case weekday::thursday: - return 4; - case weekday::friday: - return 5; - case weekday::saturday: - return 6; - } - return 0; /*NOTREACHED*/ -} - -// Convert a tm_wday value (0-6, Sunday = 0) to a cctz::weekday. -weekday FromTmWday(int tm_wday) { - switch (tm_wday) { - case 0: - return weekday::sunday; - case 1: - return weekday::monday; - case 2: - return weekday::tuesday; - case 3: - return weekday::wednesday; - case 4: - return weekday::thursday; - case 5: - return weekday::friday; - case 6: - return weekday::saturday; - } - return weekday::sunday; /*NOTREACHED*/ -} - -std::tm ToTM(const time_zone::absolute_lookup& al) { - std::tm tm{}; - tm.tm_sec = al.cs.second(); - tm.tm_min = al.cs.minute(); - tm.tm_hour = al.cs.hour(); - tm.tm_mday = al.cs.day(); - tm.tm_mon = al.cs.month() - 1; - - // Saturate tm.tm_year is cases of over/underflow. - if (al.cs.year() < std::numeric_limits::min() + 1900) { - tm.tm_year = std::numeric_limits::min(); - } else if (al.cs.year() - 1900 > std::numeric_limits::max()) { - tm.tm_year = std::numeric_limits::max(); - } else { - tm.tm_year = static_cast(al.cs.year() - 1900); - } - - tm.tm_wday = ToTmWday(get_weekday(al.cs)); - tm.tm_yday = get_yearday(al.cs) - 1; - tm.tm_isdst = al.is_dst ? 1 : 0; - return tm; -} - -// Returns the week of the year [0:53] given a civil day and the day on -// which weeks are defined to start. -int ToWeek(const civil_day& cd, weekday week_start) { - const civil_day d(cd.year() % 400, cd.month(), cd.day()); - return static_cast((d - prev_weekday(civil_year(d), week_start)) / 7); -} - -const char kDigits[] = "0123456789"; - -// Formats a 64-bit integer in the given field width. Note that it is up -// to the caller of Format64() [and Format02d()/FormatOffset()] to ensure -// that there is sufficient space before ep to hold the conversion. -char* Format64(char* ep, int width, std::int_fast64_t v) { - bool neg = false; - if (v < 0) { - --width; - neg = true; - if (v == std::numeric_limits::min()) { - // Avoid negating minimum value. - std::int_fast64_t last_digit = -(v % 10); - v /= 10; - if (last_digit < 0) { - ++v; - last_digit += 10; - } - --width; - *--ep = kDigits[last_digit]; - } - v = -v; - } - do { - --width; - *--ep = kDigits[v % 10]; - } while (v /= 10); - while (--width >= 0) *--ep = '0'; // zero pad - if (neg) *--ep = '-'; - return ep; -} - -// Formats [0 .. 99] as %02d. -char* Format02d(char* ep, int v) { - *--ep = kDigits[v % 10]; - *--ep = kDigits[(v / 10) % 10]; - return ep; -} - -// Formats a UTC offset, like +00:00. -char* FormatOffset(char* ep, int offset, const char* mode) { - // TODO: Follow the RFC3339 "Unknown Local Offset Convention" and - // generate a "negative zero" when we're formatting a zero offset - // as the result of a failed load_time_zone(). - char sign = '+'; - if (offset < 0) { - offset = -offset; // bounded by 24h so no overflow - sign = '-'; - } - const int seconds = offset % 60; - const int minutes = (offset /= 60) % 60; - const int hours = offset /= 60; - const char sep = mode[0]; - const bool ext = (sep != '\0' && mode[1] == '*'); - const bool ccc = (ext && mode[2] == ':'); - if (ext && (!ccc || seconds != 0)) { - ep = Format02d(ep, seconds); - *--ep = sep; - } else { - // If we're not rendering seconds, sub-minute negative offsets - // should get a positive sign (e.g., offset=-10s => "+00:00"). - if (hours == 0 && minutes == 0) sign = '+'; - } - if (!ccc || minutes != 0 || seconds != 0) { - ep = Format02d(ep, minutes); - if (sep != '\0') *--ep = sep; - } - ep = Format02d(ep, hours); - *--ep = sign; - return ep; -} - -// Formats a std::tm using strftime(3). -void FormatTM(std::string* out, const std::string& fmt, const std::tm& tm) { - // strftime(3) returns the number of characters placed in the output - // array (which may be 0 characters). It also returns 0 to indicate - // an error, like the array wasn't large enough. To accommodate this, - // the following code grows the buffer size from 2x the format string - // length up to 32x. - for (std::size_t i = 2; i != 32; i *= 2) { - std::size_t buf_size = fmt.size() * i; - std::vector buf(buf_size); - if (std::size_t len = strftime(&buf[0], buf_size, fmt.c_str(), &tm)) { - out->append(&buf[0], len); - return; - } - } -} - -// Used for %E#S/%E#f specifiers and for data values in parse(). -template -const char* ParseInt(const char* dp, int width, T min, T max, T* vp) { - if (dp != nullptr) { - const T kmin = std::numeric_limits::min(); - bool erange = false; - bool neg = false; - T value = 0; - if (*dp == '-') { - neg = true; - if (width <= 0 || --width != 0) { - ++dp; - } else { - dp = nullptr; // width was 1 - } - } - if (const char* const bp = dp) { - while (const char* cp = strchr(kDigits, *dp)) { - int d = static_cast(cp - kDigits); - if (d >= 10) break; - if (value < kmin / 10) { - erange = true; - break; - } - value *= 10; - if (value < kmin + d) { - erange = true; - break; - } - value -= d; - dp += 1; - if (width > 0 && --width == 0) break; - } - if (dp != bp && !erange && (neg || value != kmin)) { - if (!neg || value != 0) { - if (!neg) value = -value; // make positive - if (min <= value && value <= max) { - *vp = value; - } else { - dp = nullptr; - } - } else { - dp = nullptr; - } - } else { - dp = nullptr; - } - } - } - return dp; -} - -// The number of base-10 digits that can be represented by a signed 64-bit -// integer. That is, 10^kDigits10_64 <= 2^63 - 1 < 10^(kDigits10_64 + 1). -const int kDigits10_64 = 18; - -// 10^n for everything that can be represented by a signed 64-bit integer. -const std::int_fast64_t kExp10[kDigits10_64 + 1] = { - 1, - 10, - 100, - 1000, - 10000, - 100000, - 1000000, - 10000000, - 100000000, - 1000000000, - 10000000000, - 100000000000, - 1000000000000, - 10000000000000, - 100000000000000, - 1000000000000000, - 10000000000000000, - 100000000000000000, - 1000000000000000000, -}; - -} // namespace - -// Uses strftime(3) to format the given Time. The following extended format -// specifiers are also supported: -// -// - %Ez - RFC3339-compatible numeric UTC offset (+hh:mm or -hh:mm) -// - %E*z - Full-resolution numeric UTC offset (+hh:mm:ss or -hh:mm:ss) -// - %E#S - Seconds with # digits of fractional precision -// - %E*S - Seconds with full fractional precision (a literal '*') -// - %E4Y - Four-character years (-999 ... -001, 0000, 0001 ... 9999) -// - %ET - The RFC3339 "date-time" separator "T" -// -// The standard specifiers from RFC3339_* (%Y, %m, %d, %H, %M, and %S) are -// handled internally for performance reasons. strftime(3) is slow due to -// a POSIX requirement to respect changes to ${TZ}. -// -// The TZ/GNU %s extension is handled internally because strftime() has -// to use mktime() to generate it, and that assumes the local time zone. -// -// We also handle the %z and %Z specifiers to accommodate platforms that do -// not support the tm_gmtoff and tm_zone extensions to std::tm. -// -// Requires that zero() <= fs < seconds(1). -std::string format(const std::string& format, const time_point& tp, - const detail::femtoseconds& fs, const time_zone& tz) { - std::string result; - result.reserve(format.size()); // A reasonable guess for the result size. - const time_zone::absolute_lookup al = tz.lookup(tp); - const std::tm tm = ToTM(al); - - // Scratch buffer for internal conversions. - char buf[3 + kDigits10_64]; // enough for longest conversion - char* const ep = buf + sizeof(buf); - char* bp; // works back from ep - - // Maintain three, disjoint subsequences that span format. - // [format.begin() ... pending) : already formatted into result - // [pending ... cur) : formatting pending, but no special cases - // [cur ... format.end()) : unexamined - // Initially, everything is in the unexamined part. - const char* pending = format.c_str(); // NUL terminated - const char* cur = pending; - const char* end = pending + format.length(); - - while (cur != end) { // while something is unexamined - // Moves cur to the next percent sign. - const char* start = cur; - while (cur != end && *cur != '%') ++cur; - - // If the new pending text is all ordinary, copy it out. - if (cur != start && pending == start) { - result.append(pending, static_cast(cur - pending)); - pending = start = cur; - } - - // Span the sequential percent signs. - const char* percent = cur; - while (cur != end && *cur == '%') ++cur; - - // If the new pending text is all percents, copy out one - // percent for every matched pair, then skip those pairs. - if (cur != start && pending == start) { - std::size_t escaped = static_cast(cur - pending) / 2; - result.append(pending, escaped); - pending += escaped * 2; - // Also copy out a single trailing percent. - if (pending != cur && cur == end) { - result.push_back(*pending++); - } - } - - // Loop unless we have an unescaped percent. - if (cur == end || (cur - percent) % 2 == 0) continue; - - // Simple specifiers that we handle ourselves. - if (strchr("YmdeUuWwHMSzZs%", *cur)) { - if (cur - 1 != pending) { - FormatTM(&result, std::string(pending, cur - 1), tm); - } - switch (*cur) { - case 'Y': - // This avoids the tm.tm_year overflow problem for %Y, however - // tm.tm_year will still be used by other specifiers like %D. - bp = Format64(ep, 0, al.cs.year()); - result.append(bp, static_cast(ep - bp)); - break; - case 'm': - bp = Format02d(ep, al.cs.month()); - result.append(bp, static_cast(ep - bp)); - break; - case 'd': - case 'e': - bp = Format02d(ep, al.cs.day()); - if (*cur == 'e' && *bp == '0') *bp = ' '; // for Windows - result.append(bp, static_cast(ep - bp)); - break; - case 'U': - bp = Format02d(ep, ToWeek(civil_day(al.cs), weekday::sunday)); - result.append(bp, static_cast(ep - bp)); - break; - case 'u': - bp = Format64(ep, 0, tm.tm_wday ? tm.tm_wday : 7); - result.append(bp, static_cast(ep - bp)); - break; - case 'W': - bp = Format02d(ep, ToWeek(civil_day(al.cs), weekday::monday)); - result.append(bp, static_cast(ep - bp)); - break; - case 'w': - bp = Format64(ep, 0, tm.tm_wday); - result.append(bp, static_cast(ep - bp)); - break; - case 'H': - bp = Format02d(ep, al.cs.hour()); - result.append(bp, static_cast(ep - bp)); - break; - case 'M': - bp = Format02d(ep, al.cs.minute()); - result.append(bp, static_cast(ep - bp)); - break; - case 'S': - bp = Format02d(ep, al.cs.second()); - result.append(bp, static_cast(ep - bp)); - break; - case 'z': - bp = FormatOffset(ep, al.offset, ""); - result.append(bp, static_cast(ep - bp)); - break; - case 'Z': - result.append(al.abbr); - break; - case 's': - bp = Format64(ep, 0, ToUnixSeconds(tp)); - result.append(bp, static_cast(ep - bp)); - break; - case '%': - result.push_back('%'); - break; - } - pending = ++cur; - continue; - } - - // More complex specifiers that we handle ourselves. - if (*cur == ':' && cur + 1 != end) { - if (*(cur + 1) == 'z') { - // Formats %:z. - if (cur - 1 != pending) { - FormatTM(&result, std::string(pending, cur - 1), tm); - } - bp = FormatOffset(ep, al.offset, ":"); - result.append(bp, static_cast(ep - bp)); - pending = cur += 2; - continue; - } - if (*(cur + 1) == ':' && cur + 2 != end) { - if (*(cur + 2) == 'z') { - // Formats %::z. - if (cur - 1 != pending) { - FormatTM(&result, std::string(pending, cur - 1), tm); - } - bp = FormatOffset(ep, al.offset, ":*"); - result.append(bp, static_cast(ep - bp)); - pending = cur += 3; - continue; - } - if (*(cur + 2) == ':' && cur + 3 != end) { - if (*(cur + 3) == 'z') { - // Formats %:::z. - if (cur - 1 != pending) { - FormatTM(&result, std::string(pending, cur - 1), tm); - } - bp = FormatOffset(ep, al.offset, ":*:"); - result.append(bp, static_cast(ep - bp)); - pending = cur += 4; - continue; - } - } - } - } - - // Loop if there is no E modifier. - if (*cur != 'E' || ++cur == end) continue; - - // Format our extensions. - if (*cur == 'T') { - // Formats %ET. - if (cur - 2 != pending) { - FormatTM(&result, std::string(pending, cur - 2), tm); - } - result.append("T"); - pending = ++cur; - } else if (*cur == 'z') { - // Formats %Ez. - if (cur - 2 != pending) { - FormatTM(&result, std::string(pending, cur - 2), tm); - } - bp = FormatOffset(ep, al.offset, ":"); - result.append(bp, static_cast(ep - bp)); - pending = ++cur; - } else if (*cur == '*' && cur + 1 != end && *(cur + 1) == 'z') { - // Formats %E*z. - if (cur - 2 != pending) { - FormatTM(&result, std::string(pending, cur - 2), tm); - } - bp = FormatOffset(ep, al.offset, ":*"); - result.append(bp, static_cast(ep - bp)); - pending = cur += 2; - } else if (*cur == '*' && cur + 1 != end && - (*(cur + 1) == 'S' || *(cur + 1) == 'f')) { - // Formats %E*S or %E*F. - if (cur - 2 != pending) { - FormatTM(&result, std::string(pending, cur - 2), tm); - } - char* cp = ep; - bp = Format64(cp, 15, fs.count()); - while (cp != bp && cp[-1] == '0') --cp; - switch (*(cur + 1)) { - case 'S': - if (cp != bp) *--bp = '.'; - bp = Format02d(bp, al.cs.second()); - break; - case 'f': - if (cp == bp) *--bp = '0'; - break; - } - result.append(bp, static_cast(cp - bp)); - pending = cur += 2; - } else if (*cur == '4' && cur + 1 != end && *(cur + 1) == 'Y') { - // Formats %E4Y. - if (cur - 2 != pending) { - FormatTM(&result, std::string(pending, cur - 2), tm); - } - bp = Format64(ep, 4, al.cs.year()); - result.append(bp, static_cast(ep - bp)); - pending = cur += 2; - } else if (std::isdigit(*cur)) { - // Possibly found %E#S or %E#f. - int n = 0; - if (const char* np = ParseInt(cur, 0, 0, 1024, &n)) { - if (*np == 'S' || *np == 'f') { - // Formats %E#S or %E#f. - if (cur - 2 != pending) { - FormatTM(&result, std::string(pending, cur - 2), tm); - } - bp = ep; - if (n > 0) { - if (n > kDigits10_64) n = kDigits10_64; - bp = Format64(bp, n, - (n > 15) ? fs.count() * kExp10[n - 15] - : fs.count() / kExp10[15 - n]); - if (*np == 'S') *--bp = '.'; - } - if (*np == 'S') bp = Format02d(bp, al.cs.second()); - result.append(bp, static_cast(ep - bp)); - pending = cur = ++np; - } - } - } - } - - // Formats any remaining data. - if (end != pending) { - FormatTM(&result, std::string(pending, end), tm); - } - - return result; -} - -namespace { - -const char* ParseOffset(const char* dp, const char* mode, int* offset) { - if (dp != nullptr) { - const char first = *dp++; - if (first == '+' || first == '-') { - char sep = mode[0]; - int hours = 0; - int minutes = 0; - int seconds = 0; - const char* ap = ParseInt(dp, 2, 0, 23, &hours); - if (ap != nullptr && ap - dp == 2) { - dp = ap; - if (sep != '\0' && *ap == sep) ++ap; - const char* bp = ParseInt(ap, 2, 0, 59, &minutes); - if (bp != nullptr && bp - ap == 2) { - dp = bp; - if (sep != '\0' && *bp == sep) ++bp; - const char* cp = ParseInt(bp, 2, 0, 59, &seconds); - if (cp != nullptr && cp - bp == 2) dp = cp; - } - *offset = ((hours * 60 + minutes) * 60) + seconds; - if (first == '-') *offset = -*offset; - } else { - dp = nullptr; - } - } else if (first == 'Z' || first == 'z') { // Zulu - *offset = 0; - } else { - dp = nullptr; - } - } - return dp; -} - -const char* ParseZone(const char* dp, std::string* zone) { - zone->clear(); - if (dp != nullptr) { - while (*dp != '\0' && !std::isspace(*dp)) zone->push_back(*dp++); - if (zone->empty()) dp = nullptr; - } - return dp; -} - -const char* ParseSubSeconds(const char* dp, detail::femtoseconds* subseconds) { - if (dp != nullptr) { - std::int_fast64_t v = 0; - std::int_fast64_t exp = 0; - const char* const bp = dp; - while (const char* cp = strchr(kDigits, *dp)) { - int d = static_cast(cp - kDigits); - if (d >= 10) break; - if (exp < 15) { - exp += 1; - v *= 10; - v += d; - } - ++dp; - } - if (dp != bp) { - v *= kExp10[15 - exp]; - *subseconds = detail::femtoseconds(v); - } else { - dp = nullptr; - } - } - return dp; -} - -// Parses a string into a std::tm using strptime(3). -const char* ParseTM(const char* dp, const char* fmt, std::tm* tm) { - if (dp != nullptr) { - dp = strptime(dp, fmt, tm); - } - return dp; -} - -// Sets year, tm_mon and tm_mday given the year, week_num, and tm_wday, -// and the day on which weeks are defined to start. Returns false if year -// would need to move outside its bounds. -bool FromWeek(int week_num, weekday week_start, year_t* year, std::tm* tm) { - const civil_year y(*year % 400); - civil_day cd = prev_weekday(y, week_start); // week 0 - cd = next_weekday(cd - 1, FromTmWday(tm->tm_wday)) + (week_num * 7); - if (const year_t shift = cd.year() - y.year()) { - if (shift > 0) { - if (*year > std::numeric_limits::max() - shift) return false; - } else { - if (*year < std::numeric_limits::min() - shift) return false; - } - *year += shift; - } - tm->tm_mon = cd.month() - 1; - tm->tm_mday = cd.day(); - return true; -} - -} // namespace - -// Uses strptime(3) to parse the given input. Supports the same extended -// format specifiers as format(), although %E#S and %E*S are treated -// identically (and similarly for %E#f and %E*f). %Ez and %E*z also accept -// the same inputs. %ET accepts either 'T' or 't'. -// -// The standard specifiers from RFC3339_* (%Y, %m, %d, %H, %M, and %S) are -// handled internally so that we can normally avoid strptime() altogether -// (which is particularly helpful when the native implementation is broken). -// -// The TZ/GNU %s extension is handled internally because strptime() has to -// use localtime_r() to generate it, and that assumes the local time zone. -// -// We also handle the %z specifier to accommodate platforms that do not -// support the tm_gmtoff extension to std::tm. %Z is parsed but ignored. -bool parse(const std::string& format, const std::string& input, - const time_zone& tz, time_point* sec, - detail::femtoseconds* fs, std::string* err) { - // The unparsed input. - const char* data = input.c_str(); // NUL terminated - - // Skips leading whitespace. - while (std::isspace(*data)) ++data; - - const year_t kyearmax = std::numeric_limits::max(); - const year_t kyearmin = std::numeric_limits::min(); - - // Sets default values for unspecified fields. - bool saw_year = false; - year_t year = 1970; - std::tm tm{}; - tm.tm_year = 1970 - 1900; - tm.tm_mon = 1 - 1; // Jan - tm.tm_mday = 1; - tm.tm_hour = 0; - tm.tm_min = 0; - tm.tm_sec = 0; - tm.tm_wday = 4; // Thu - tm.tm_yday = 0; - tm.tm_isdst = 0; - auto subseconds = detail::femtoseconds::zero(); - bool saw_offset = false; - int offset = 0; // No offset from passed tz. - std::string zone = "UTC"; - - const char* fmt = format.c_str(); // NUL terminated - bool twelve_hour = false; - bool afternoon = false; - int week_num = -1; - weekday week_start = weekday::sunday; - - bool saw_percent_s = false; - std::int_fast64_t percent_s = 0; - - // Steps through format, one specifier at a time. - while (data != nullptr && *fmt != '\0') { - if (std::isspace(*fmt)) { - while (std::isspace(*data)) ++data; - while (std::isspace(*++fmt)) continue; - continue; - } - - if (*fmt != '%') { - if (*data == *fmt) { - ++data; - ++fmt; - } else { - data = nullptr; - } - continue; - } - - const char* percent = fmt; - if (*++fmt == '\0') { - data = nullptr; - continue; - } - switch (*fmt++) { - case 'Y': - // Symmetrically with FormatTime(), directly handing %Y avoids the - // tm.tm_year overflow problem. However, tm.tm_year will still be - // used by other specifiers like %D. - data = ParseInt(data, 0, kyearmin, kyearmax, &year); - if (data != nullptr) saw_year = true; - continue; - case 'm': - data = ParseInt(data, 2, 1, 12, &tm.tm_mon); - if (data != nullptr) tm.tm_mon -= 1; - week_num = -1; - continue; - case 'd': - case 'e': - data = ParseInt(data, 2, 1, 31, &tm.tm_mday); - week_num = -1; - continue; - case 'U': - data = ParseInt(data, 0, 0, 53, &week_num); - week_start = weekday::sunday; - continue; - case 'W': - data = ParseInt(data, 0, 0, 53, &week_num); - week_start = weekday::monday; - continue; - case 'u': - data = ParseInt(data, 0, 1, 7, &tm.tm_wday); - if (data != nullptr) tm.tm_wday %= 7; - continue; - case 'w': - data = ParseInt(data, 0, 0, 6, &tm.tm_wday); - continue; - case 'H': - data = ParseInt(data, 2, 0, 23, &tm.tm_hour); - twelve_hour = false; - continue; - case 'M': - data = ParseInt(data, 2, 0, 59, &tm.tm_min); - continue; - case 'S': - data = ParseInt(data, 2, 0, 60, &tm.tm_sec); - continue; - case 'I': - case 'l': - case 'r': // probably uses %I - twelve_hour = true; - break; - case 'R': // uses %H - case 'T': // uses %H - case 'c': // probably uses %H - case 'X': // probably uses %H - twelve_hour = false; - break; - case 'z': - data = ParseOffset(data, "", &offset); - if (data != nullptr) saw_offset = true; - continue; - case 'Z': // ignored; zone abbreviations are ambiguous - data = ParseZone(data, &zone); - continue; - case 's': - data = - ParseInt(data, 0, std::numeric_limits::min(), - std::numeric_limits::max(), &percent_s); - if (data != nullptr) saw_percent_s = true; - continue; - case ':': - if (fmt[0] == 'z' || - (fmt[0] == ':' && - (fmt[1] == 'z' || (fmt[1] == ':' && fmt[2] == 'z')))) { - data = ParseOffset(data, ":", &offset); - if (data != nullptr) saw_offset = true; - fmt += (fmt[0] == 'z') ? 1 : (fmt[1] == 'z') ? 2 : 3; - continue; - } - break; - case '%': - data = (*data == '%' ? data + 1 : nullptr); - continue; - case 'E': - if (fmt[0] == 'T') { - if (*data == 'T' || *data == 't') { - ++data; - ++fmt; - } else { - data = nullptr; - } - continue; - } - if (fmt[0] == 'z' || (fmt[0] == '*' && fmt[1] == 'z')) { - data = ParseOffset(data, ":", &offset); - if (data != nullptr) saw_offset = true; - fmt += (fmt[0] == 'z') ? 1 : 2; - continue; - } - if (fmt[0] == '*' && fmt[1] == 'S') { - data = ParseInt(data, 2, 0, 60, &tm.tm_sec); - if (data != nullptr && *data == '.') { - data = ParseSubSeconds(data + 1, &subseconds); - } - fmt += 2; - continue; - } - if (fmt[0] == '*' && fmt[1] == 'f') { - if (data != nullptr && std::isdigit(*data)) { - data = ParseSubSeconds(data, &subseconds); - } - fmt += 2; - continue; - } - if (fmt[0] == '4' && fmt[1] == 'Y') { - const char* bp = data; - data = ParseInt(data, 4, year_t{-999}, year_t{9999}, &year); - if (data != nullptr) { - if (data - bp == 4) { - saw_year = true; - } else { - data = nullptr; // stopped too soon - } - } - fmt += 2; - continue; - } - if (std::isdigit(*fmt)) { - int n = 0; // value ignored - if (const char* np = ParseInt(fmt, 0, 0, 1024, &n)) { - if (*np == 'S') { - data = ParseInt(data, 2, 0, 60, &tm.tm_sec); - if (data != nullptr && *data == '.') { - data = ParseSubSeconds(data + 1, &subseconds); - } - fmt = ++np; - continue; - } - if (*np == 'f') { - if (data != nullptr && std::isdigit(*data)) { - data = ParseSubSeconds(data, &subseconds); - } - fmt = ++np; - continue; - } - } - } - if (*fmt == 'c') twelve_hour = false; // probably uses %H - if (*fmt == 'X') twelve_hour = false; // probably uses %H - if (*fmt != '\0') ++fmt; - break; - case 'O': - if (*fmt == 'H') twelve_hour = false; - if (*fmt == 'I') twelve_hour = true; - if (*fmt != '\0') ++fmt; - break; - } - - // Parses the current specifier. - const char* orig_data = data; - std::string spec(percent, static_cast(fmt - percent)); - data = ParseTM(data, spec.c_str(), &tm); - - // If we successfully parsed %p we need to remember whether the result - // was AM or PM so that we can adjust tm_hour before time_zone::lookup(). - // So reparse the input with a known AM hour, and check if it is shifted - // to a PM hour. - if (spec == "%p" && data != nullptr) { - std::string test_input = "1"; - test_input.append(orig_data, static_cast(data - orig_data)); - const char* test_data = test_input.c_str(); - std::tm tmp{}; - ParseTM(test_data, "%I%p", &tmp); - afternoon = (tmp.tm_hour == 13); - } - } - - // Adjust a 12-hour tm_hour value if it should be in the afternoon. - if (twelve_hour && afternoon && tm.tm_hour < 12) { - tm.tm_hour += 12; - } - - if (data == nullptr) { - if (err != nullptr) *err = "Failed to parse input"; - return false; - } - - // Skip any remaining whitespace. - while (std::isspace(*data)) ++data; - - // parse() must consume the entire input string. - if (*data != '\0') { - if (err != nullptr) *err = "Illegal trailing data in input string"; - return false; - } - - // If we saw %s then we ignore anything else and return that time. - if (saw_percent_s) { - *sec = FromUnixSeconds(percent_s); - *fs = detail::femtoseconds::zero(); - return true; - } - - // If we saw %z, %Ez, or %E*z then we want to interpret the parsed fields - // in UTC and then shift by that offset. Otherwise we want to interpret - // the fields directly in the passed time_zone. - time_zone ptz = saw_offset ? utc_time_zone() : tz; - - // Allows a leap second of 60 to normalize forward to the following ":00". - if (tm.tm_sec == 60) { - tm.tm_sec -= 1; - offset -= 1; - subseconds = detail::femtoseconds::zero(); - } - - if (!saw_year) { - year = year_t{tm.tm_year}; - if (year > kyearmax - 1900) { - // Platform-dependent, maybe unreachable. - if (err != nullptr) *err = "Out-of-range year"; - return false; - } - year += 1900; - } - - // Compute year, tm.tm_mon and tm.tm_mday if we parsed a week number. - if (week_num != -1) { - if (!FromWeek(week_num, week_start, &year, &tm)) { - if (err != nullptr) *err = "Out-of-range field"; - return false; - } - } - - const int month = tm.tm_mon + 1; - civil_second cs(year, month, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec); - - // parse() should not allow normalization. Due to the restricted field - // ranges above (see ParseInt()), the only possibility is for days to roll - // into months. That is, parsing "Sep 31" should not produce "Oct 1". - if (cs.month() != month || cs.day() != tm.tm_mday) { - if (err != nullptr) *err = "Out-of-range field"; - return false; - } - - // Accounts for the offset adjustment before converting to absolute time. - if ((offset < 0 && cs > civil_second::max() + offset) || - (offset > 0 && cs < civil_second::min() + offset)) { - if (err != nullptr) *err = "Out-of-range field"; - return false; - } - cs -= offset; - - const auto tp = ptz.lookup(cs).pre; - // Checks for overflow/underflow and returns an error as necessary. - if (tp == time_point::max()) { - const auto al = ptz.lookup(time_point::max()); - if (cs > al.cs) { - if (err != nullptr) *err = "Out-of-range field"; - return false; - } - } - if (tp == time_point::min()) { - const auto al = ptz.lookup(time_point::min()); - if (cs < al.cs) { - if (err != nullptr) *err = "Out-of-range field"; - return false; - } - } - - *sec = tp; - *fs = subseconds; - return true; -} - -} // namespace detail -} // namespace cctz -} // namespace time_internal -ABSL_NAMESPACE_END -} // namespace absl -- cgit 1.4.1