Add parse_datetime

louloulibs/utils/time.cpp

@@ -1,4 +1,5 @@
 #include <utils/time.hpp>
+#include <time.h>
 
 namespace utils
 {
@@ -10,4 +11,14 @@ std::string to_string(const std::time_t& timestamp)
     return "";
   return {std::begin(date_buf), std::end(date_buf) - 1};
 }
+
+std::time_t parse_datetime(const std::string& stamp)
+{
+  struct tm tm;
+  if (!::strptime(stamp.data(), "%FT%T%z", &tm))
+    return -1;
+  auto res = ::timegm(&tm);
+  return res;
+}
+
 }

louloulibs/utils/time.hpp

@@ -6,4 +6,5 @@
 namespace utils
 {
 std::string to_string(const std::time_t& timestamp);
+std::time_t parse_datetime(const std::string& stamp);
 }

tests/utils.cpp

@@ -121,3 +121,11 @@ TEST_CASE("time_to_string")
   CHECK(utils::to_string(stamp).size() == result.size());
   CHECK(utils::to_string(0) == "1970-01-01T00:00:00Z");
 }
+
+TEST_CASE("parse_datetime")
+{
+  const auto time = utils::parse_datetime("1970-01-01T00:00:00Z");
+  CHECK(time == 0);
+  CHECK(utils::parse_datetime("2016-08-29T14:29:28Z") == 1472480968);
+  CHECK(utils::parse_datetime("blah") == -1);
+}