diff options
Diffstat (limited to 'src/utils/time.cpp')
-rw-r--r-- | src/utils/time.cpp | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/src/utils/time.cpp b/src/utils/time.cpp new file mode 100644 index 0000000..88b3de3 --- /dev/null +++ b/src/utils/time.cpp @@ -0,0 +1,70 @@ +#include <utils/time.hpp> +#include <ctime> + +#include <sstream> +#include <iomanip> +#include <locale> + +#include "biboumi.h" + +namespace utils +{ +std::string to_string(const std::time_t& timestamp) +{ + constexpr std::size_t stamp_size = 21; + char date_buf[stamp_size]; + if (std::strftime(date_buf, stamp_size, "%FT%TZ", std::gmtime(×tamp)) != stamp_size - 1) + return ""; + return {std::begin(date_buf), std::end(date_buf) - 1}; +} + +std::time_t parse_datetime(const std::string& stamp) +{ + static const char* format = "%Y-%m-%dT%H:%M:%S"; + std::tm t = {}; +#ifdef HAS_GET_TIME + std::istringstream ss(stamp); + ss.imbue(std::locale("C")); + + std::string timezone; + ss >> std::get_time(&t, format) >> timezone; + if (ss.fail()) + return -1; +#else + /* Y - m - d T H : M : S */ + constexpr std::size_t stamp_size_without_tz = 4 + 1 + 2 + 1 + 2 + 1 + 2 + 1 + 2 + 1 + 2; + if (!strptime(stamp.data(), format, &t)) { + return -1; + } + const std::string timezone(stamp.data() + stamp_size_without_tz); +#endif + + if (timezone.empty()) + return -1; + + if (timezone.compare(0, 1, "Z") != 0) + { + std::stringstream tz_ss; + tz_ss << timezone; + int multiplier = -1; + char prefix; + int hours; + char sep; + int minutes; + tz_ss >> prefix >> hours >> sep >> minutes; + if (tz_ss.fail()) + return -1; + if (prefix == '-') + multiplier = +1; + else if (prefix != '+') + return -1; + + t.tm_hour += multiplier * hours; + t.tm_min += multiplier * minutes; + } + return ::timegm(&t); +} + +} + + |