From c54f28d29d5f1d7a2bb973609beffbe5ad56d422 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?louiz=E2=80=99?= <louiz@louiz.org>
Date: Tue, 11 Oct 2016 21:00:56 +0200
Subject: =?UTF-8?q?Conditionally=20use=20strptime=20if=20we=20don=E2=80=99?=
 =?UTF-8?q?t=20have=20std::get=5Ftime?=
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---
 louloulibs/CMakeLists.txt     | 13 +++++++++++++
 louloulibs/louloulibs.h.cmake |  3 ++-
 louloulibs/utils/time.cpp     | 11 +++++++++++
 3 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/louloulibs/CMakeLists.txt b/louloulibs/CMakeLists.txt
index bf53504..1858bb3 100644
--- a/louloulibs/CMakeLists.txt
+++ b/louloulibs/CMakeLists.txt
@@ -143,4 +143,17 @@ if(SYSTEMD_FOUND)
   target_link_libraries(xmpplib ${SYSTEMD_LIBRARIES})
 endif()
 
+#
+## Check if we have std::get_time
+#
+include(CheckCXXSourceCompiles)
+
+check_cxx_source_compiles("
+  #include <iomanip>
+  int main()
+  { std::get_time(nullptr, \"\"); }"
+  HAS_GET_TIME)
+
+mark_as_advanced(HAS_GET_TIME)
+
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/louloulibs.h.cmake ${CMAKE_BINARY_DIR}/src/louloulibs.h)
diff --git a/louloulibs/louloulibs.h.cmake b/louloulibs/louloulibs.h.cmake
index 2feaf4e..d5328b8 100644
--- a/louloulibs/louloulibs.h.cmake
+++ b/louloulibs/louloulibs.h.cmake
@@ -6,4 +6,5 @@
 #cmakedefine BOTAN_FOUND
 #cmakedefine CARES_FOUND
 #cmakedefine SOFTWARE_VERSION "${SOFTWARE_VERSION}"
-#cmakedefine PROJECT_NAME "${PROJECT_NAME}"
\ No newline at end of file
+#cmakedefine PROJECT_NAME "${PROJECT_NAME}"
+#cmakedefine HAS_GET_TIME
diff --git a/louloulibs/utils/time.cpp b/louloulibs/utils/time.cpp
index 7ad6663..afd6117 100644
--- a/louloulibs/utils/time.cpp
+++ b/louloulibs/utils/time.cpp
@@ -5,6 +5,8 @@
 #include <iomanip>
 #include <locale>
 
+#include "louloulibs.h"
+
 namespace utils
 {
 std::string to_string(const std::time_t& timestamp)
@@ -20,6 +22,7 @@ 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"));
 
@@ -27,6 +30,14 @@ std::time_t parse_datetime(const std::string& stamp)
   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;
-- 
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