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-rw-r--r--louloulibs/utils/time.cpp70
1 files changed, 70 insertions, 0 deletions
diff --git a/louloulibs/utils/time.cpp b/louloulibs/utils/time.cpp
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+++ b/louloulibs/utils/time.cpp
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+#include <utils/time.hpp>
+#include <time.h>
+
+#include <sstream>
+#include <iomanip>
+#include <locale>
+
+#include "louloulibs.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(&timestamp)) != 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("en_US.utf-8"));
+
+ 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);
+}
+
+}
+
+