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timestamp.hpp
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#ifndef OSMIUM_OSM_TIMESTAMP_HPP
#define OSMIUM_OSM_TIMESTAMP_HPP
/*
This file is part of Osmium (https://osmcode.org/libosmium).
Copyright 2013-2025 Jochen Topf <jochen@topf.org> and others (see README).
Boost Software License - Version 1.0 - August 17th, 2003
Permission is hereby granted, free of charge, to any person or organization
obtaining a copy of the software and accompanying documentation covered by
this license (the "Software") to use, reproduce, display, distribute,
execute, and transmit the Software, and to prepare derivative works of the
Software, and to permit third-parties to whom the Software is furnished to
do so, all subject to the following:
The copyright notices in the Software and this entire statement, including
the above license grant, this restriction and the following disclaimer,
must be included in all copies of the Software, in whole or in part, and
all derivative works of the Software, unless such copies or derivative
works are solely in the form of machine-executable object code generated by
a source language processor.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
*/
#include <osmium/util/minmax.hpp> // IWYU pragma: keep
#include <array>
#include <cassert>
#include <cstdint>
#include <ctime>
#include <iosfwd>
#include <limits>
#include <stdexcept>
#include <string>
#include <type_traits>
namespace osmium {
namespace detail {
inline void add_2digit_int_to_string(int value, std::string& out) {
assert(value >= 0 && value <= 99);
if (value > 9) {
const int dec = value / 10;
out += static_cast<char>('0' + dec);
value -= dec * 10;
} else {
out += '0';
}
out += static_cast<char>('0' + value);
}
inline void add_4digit_int_to_string(int value, std::string& out) {
assert(value >= 1000 && value <= 9999);
const int dec1 = value / 1000;
out += static_cast<char>('0' + dec1);
value -= dec1 * 1000;
const int dec2 = value / 100;
out += static_cast<char>('0' + dec2);
value -= dec2 * 100;
const int dec3 = value / 10;
out += static_cast<char>('0' + dec3);
value -= dec3 * 10;
out += static_cast<char>('0' + value);
}
inline bool fractional_seconds(const char** s) noexcept {
const char* str = *s;
if (*str != '.' && *str != ',') {
return false;
}
++str;
if (*str < '0' || *str > '9') {
return false;
}
do {
++str;
} while (*str >= '0' && *str <= '9');
*s = str;
return *str == 'Z';
}
inline std::time_t parse_timestamp(const char** s) {
const char* str = *s;
*s += 19;
static const std::array<int, 12> mon_lengths = {{
31, 29, 31, 30, 31, 30,
31, 31, 30, 31, 30, 31
}};
if (str[ 0] >= '0' && str[ 0] <= '9' &&
str[ 1] >= '0' && str[ 1] <= '9' &&
str[ 2] >= '0' && str[ 2] <= '9' &&
str[ 3] >= '0' && str[ 3] <= '9' &&
str[ 4] == '-' &&
str[ 5] >= '0' && str[ 5] <= '9' &&
str[ 6] >= '0' && str[ 6] <= '9' &&
str[ 7] == '-' &&
str[ 8] >= '0' && str[ 8] <= '9' &&
str[ 9] >= '0' && str[ 9] <= '9' &&
str[10] == 'T' &&
str[11] >= '0' && str[11] <= '9' &&
str[12] >= '0' && str[12] <= '9' &&
str[13] == ':' &&
str[14] >= '0' && str[14] <= '9' &&
str[15] >= '0' && str[15] <= '9' &&
str[16] == ':' &&
str[17] >= '0' && str[17] <= '9' &&
str[18] >= '0' && str[18] <= '9' &&
(str[19] == 'Z' || fractional_seconds(s))) {
++(*s);
std::tm tm; // NOLINT(cppcoreguidelines-pro-type-member-init,hicpp-member-init)
tm.tm_year = (str[ 0] - '0') * 1000 +
(str[ 1] - '0') * 100 +
(str[ 2] - '0') * 10 +
(str[ 3] - '0') - 1900;
tm.tm_mon = (str[ 5] - '0') * 10 + (str[ 6] - '0') - 1;
tm.tm_mday = (str[ 8] - '0') * 10 + (str[ 9] - '0');
tm.tm_hour = (str[11] - '0') * 10 + (str[12] - '0');
tm.tm_min = (str[14] - '0') * 10 + (str[15] - '0');
tm.tm_sec = (str[17] - '0') * 10 + (str[18] - '0');
tm.tm_wday = 0;
tm.tm_yday = 0;
tm.tm_isdst = 0;
if (tm.tm_year >= 0 &&
tm.tm_mon >= 0 && tm.tm_mon <= 11 &&
tm.tm_mday >= 1 && tm.tm_mday <= mon_lengths[tm.tm_mon] &&
tm.tm_hour >= 0 && tm.tm_hour <= 23 &&
tm.tm_min >= 0 && tm.tm_min <= 59 &&
tm.tm_sec >= 0 && tm.tm_sec <= 60) {
#ifndef _WIN32
return timegm(&tm);
#else
return _mkgmtime(&tm);
#endif
}
}
throw std::invalid_argument{std::string{"can not parse timestamp: '"} + str + "'"};
}
inline std::time_t parse_timestamp(const char* s) {
const char** str = &s;
return parse_timestamp(str);
}
} // namespace detail
class Timestamp {
uint32_t m_timestamp = 0;
void to_iso_str(std::string& s) const {
std::tm tm; // NOLINT(cppcoreguidelines-pro-type-member-init,hicpp-member-init)
const std::time_t sse = seconds_since_epoch();
#ifndef NDEBUG
auto result =
#endif
#ifndef _WIN32
gmtime_r(&sse, &tm);
assert(result != nullptr);
#else
gmtime_s(&tm, &sse);
assert(result == 0);
#endif
detail::add_4digit_int_to_string(tm.tm_year + 1900, s);
s += '-';
detail::add_2digit_int_to_string(tm.tm_mon + 1, s);
s += '-';
detail::add_2digit_int_to_string(tm.tm_mday, s);
s += 'T';
detail::add_2digit_int_to_string(tm.tm_hour, s);
s += ':';
detail::add_2digit_int_to_string(tm.tm_min, s);
s += ':';
detail::add_2digit_int_to_string(tm.tm_sec, s);
s += 'Z';
}
public:
constexpr Timestamp() noexcept = default;
template <typename T, typename std::enable_if_t<std::is_integral<T>::value, int> = 0>
constexpr Timestamp(T timestamp) noexcept : // NOLINT(google-explicit-constructor, hicpp-explicit-conversions)
m_timestamp(static_cast<uint32_t>(timestamp)) {
}
explicit Timestamp(const char* timestamp) :
m_timestamp(static_cast<uint32_t>(detail::parse_timestamp(timestamp))) {
}
explicit Timestamp(const std::string& timestamp) :
Timestamp(timestamp.c_str()) {
}
bool valid() const noexcept {
return m_timestamp != 0;
}
explicit constexpr operator bool() const noexcept {
return m_timestamp != 0;
}
constexpr std::time_t seconds_since_epoch() const noexcept {
return static_cast<std::time_t>(m_timestamp);
}
explicit constexpr operator uint32_t() const noexcept {
return m_timestamp;
}
explicit constexpr operator uint64_t() const noexcept {
return static_cast<uint64_t>(m_timestamp);
}
template <typename T>
void operator+=(T time_difference) noexcept {
m_timestamp += time_difference;
}
template <typename T>
void operator-=(T time_difference) noexcept {
m_timestamp -= time_difference;
}
std::string to_iso() const {
std::string s;
if (m_timestamp != 0) {
to_iso_str(s);
}
return s;
}
std::string to_iso_all() const {
std::string s;
to_iso_str(s);
return s;
}
}; // class Timestamp
constexpr Timestamp start_of_time() noexcept {
return {1};
}
constexpr Timestamp end_of_time() noexcept {
return {std::numeric_limits<uint32_t>::max()};
}
template <typename TChar, typename TTraits>
inline std::basic_ostream<TChar, TTraits>& operator<<(std::basic_ostream<TChar, TTraits>& out, Timestamp timestamp) {
out << timestamp.to_iso();
return out;
}
inline bool operator==(const Timestamp& lhs, const Timestamp& rhs) noexcept {
return static_cast<uint32_t>(lhs) == static_cast<uint32_t>(rhs);
}
inline bool operator!=(const Timestamp& lhs, const Timestamp& rhs) noexcept {
return !(lhs == rhs);
}
inline bool operator<(const Timestamp& lhs, const Timestamp& rhs) noexcept {
return static_cast<uint32_t>(lhs) < static_cast<uint32_t>(rhs);
}
inline bool operator>(const Timestamp& lhs, const Timestamp& rhs) noexcept {
return rhs < lhs;
}
inline bool operator<=(const Timestamp& lhs, const Timestamp& rhs) noexcept {
return !(rhs < lhs);
}
inline bool operator>=(const Timestamp& lhs, const Timestamp& rhs) noexcept {
return !(lhs < rhs);
}
template <>
inline osmium::Timestamp min_op_start_value<osmium::Timestamp>() {
return end_of_time();
}
template <>
inline osmium::Timestamp max_op_start_value<osmium::Timestamp>() {
return start_of_time();
}
} // namespace osmium
#endif // OSMIUM_OSM_TIMESTAMP_HPP
osmium::Timestamp
Definition timestamp.hpp:175
osmium::Timestamp::to_iso_str
void to_iso_str(std::string &s) const
Definition timestamp.hpp:179
osmium::Timestamp::to_iso
std::string to_iso() const
Definition timestamp.hpp:291
osmium::Timestamp::Timestamp
Timestamp(const std::string &timestamp)
Definition timestamp.hpp:244
osmium::Timestamp::Timestamp
constexpr Timestamp() noexcept=default
osmium::Timestamp::m_timestamp
uint32_t m_timestamp
Definition timestamp.hpp:177
osmium::Timestamp::valid
bool valid() const noexcept
Definition timestamp.hpp:252
osmium::Timestamp::seconds_since_epoch
constexpr std::time_t seconds_since_epoch() const noexcept
Explicit conversion into time_t.
Definition timestamp.hpp:262
osmium::Timestamp::operator+=
void operator+=(T time_difference) noexcept
Definition timestamp.hpp:277
osmium::Timestamp::operator-=
void operator-=(T time_difference) noexcept
Definition timestamp.hpp:282
osmium::Timestamp::Timestamp
Timestamp(const char *timestamp)
Definition timestamp.hpp:234
osmium::Timestamp::to_iso_all
std::string to_iso_all() const
Definition timestamp.hpp:306
minmax.hpp
detail
Definition attr.hpp:342
osmium
Namespace for everything in the Osmium library.
Definition assembler.hpp:53
osmium::end_of_time
constexpr Timestamp end_of_time() noexcept
Definition timestamp.hpp:328
osmium::operator==
bool operator==(const Changeset &lhs, const Changeset &rhs)
Definition changeset.hpp:440
osmium::max_op_start_value< osmium::Timestamp >
osmium::Timestamp max_op_start_value< osmium::Timestamp >()
Definition timestamp.hpp:368
osmium::operator<=
bool operator<=(const Changeset &lhs, const Changeset &rhs)
Definition changeset.hpp:459
osmium::operator>
bool operator>(const Changeset &lhs, const Changeset &rhs)
Definition changeset.hpp:455
osmium::min_op_start_value< osmium::Timestamp >
osmium::Timestamp min_op_start_value< osmium::Timestamp >()
Definition timestamp.hpp:363
osmium::operator>=
bool operator>=(const Changeset &lhs, const Changeset &rhs)
Definition changeset.hpp:463
osmium::operator!=
bool operator!=(const Changeset &lhs, const Changeset &rhs)
Definition changeset.hpp:444
osmium::start_of_time
constexpr Timestamp start_of_time() noexcept
Definition timestamp.hpp:320
osmium::operator<<
std::basic_ostream< TChar, TTraits > & operator<<(std::basic_ostream< TChar, TTraits > &out, const item_type item_type)
Definition item_type.hpp:187
osmium::operator<
bool operator<(const Changeset &lhs, const Changeset &rhs)
Definition changeset.hpp:451
std
Definition location.hpp:555