[core] Merge rfc1123, iso8601, and parse_date into chrono.hpp and fix their API

1 files changed, 35 insertions, 0 deletions

diff --git a/src/mbgl/util/chrono.cpp b/src/mbgl/util/chrono.cpp
index ca8ebca953..f0b3f88192 100644
--- a/src/mbgl/util/chrono.cpp
+++ b/src/mbgl/util/chrono.cpp
@@ -1,5 +1,9 @@
 #include <mbgl/util/chrono.hpp>
 
+#include <parsedate/parsedate.h>
+
+#include <cstdio>
+
 namespace mbgl {
 
 template Duration toDuration<Clock, Duration>(TimePoint);
@@ -17,4 +21,35 @@ template Milliseconds asMilliseconds<Seconds>(Seconds);
 template Milliseconds toMilliseconds<Clock, Duration>(TimePoint);
 template Milliseconds toMilliseconds<SystemClock, SystemDuration>(SystemTimePoint);
 
+namespace util {
+
+static const char *week[] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
+static const char *months[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
+                               "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
+
+std::string rfc1123(SystemTimePoint timePoint) {
+    std::time_t time = SystemClock::to_time_t(timePoint);
+    std::tm info;
+    gmtime_r(&time, &info);
+    char buffer[30];
+    snprintf(buffer, 30, "%s, %02d %s %4d %02d:%02d:%02d GMT", week[info.tm_wday], info.tm_mday,
+             months[info.tm_mon], 1900 + info.tm_year, info.tm_hour, info.tm_min, info.tm_sec);
+    return buffer;
+}
+
+std::string iso8601(SystemTimePoint timePoint) {
+    std::time_t time = SystemClock::to_time_t(timePoint);
+    std::tm info;
+    gmtime_r(&time, &info);
+    char buffer[30];
+    std::strftime(buffer, sizeof(buffer), "%F %T", &info);
+    return buffer;
+}
+
+SystemTimePoint parseTimePoint(const char * timePoint) {
+    return SystemClock::from_time_t(parse_date(timePoint));
+}
+
+} // namespace util
+
 } // namespace mbgl