Native Windows support

.github/workflows/cmake.yml

@@ -22,20 +22,40 @@ jobs:
             runner: macos-14
           - name: "macOS 13"
             runner: macos-13
+          - name: "Windows"
+            runner: windows-latest
     runs-on: ${{ matrix.runner }}
 
     steps:
-    - uses: actions/checkout@v4
+      - uses: actions/checkout@v4
 
-    # Configure in-source build and tests
-    - name: Configure CMake
-      run: cmake -S . -B . -DCMAKE_BUILD_TYPE=${BUILD_TYPE}
+      # Configure in-source build and tests
+      - name: Configure CMake
+        shell: bash
+        run: |
+          if [ "$RUNNER_OS" = "Windows" ]; then
+            cmake -S . -B build -DCMAKE_BUILD_TYPE=${BUILD_TYPE}
+          else
+            cmake -S . -B . -DCMAKE_BUILD_TYPE=${BUILD_TYPE}
+          fi
 
-    - name: Build project
-      run: cmake --build .
+      - name: Build project
+        shell: bash
+        run: |
+          if [ "$RUNNER_OS" = "Windows" ]; then
+            cmake --build build
+          else
+            cmake --build .
+          fi
 
-    - name: Test project
-      run: make test
+      - name: Test project
+        shell: bash
+        run: |
+          if [ "$RUNNER_OS" = "Windows" ]; then
+            cd build && ctest --output-on-failure
+          else
+            make test
+          fi
 
   integration-test:
     needs: build

cmake/CXXSniffer.cmake

@@ -25,4 +25,8 @@ else (${CMAKE_SYSTEM_NAME} MATCHES "Linux")
   set (UNKNOWN true)
 endif (${CMAKE_SYSTEM_NAME} MATCHES "Linux")
 
-set (CMAKE_CXX_FLAGS "-Wall -Wextra -Wsign-compare -Wreturn-type ${CMAKE_CXX_FLAGS}")
+if (NOT MSVC)
+  set (CMAKE_CXX_FLAGS "-Wall -Wextra -Wsign-compare -Wreturn-type ${CMAKE_CXX_FLAGS}")
+else()
+  set (CMAKE_CXX_FLAGS "/W4 ${CMAKE_CXX_FLAGS}")
+endif()

src/Datetime.cpp

@@ -3124,6 +3124,16 @@ time_t Datetime::timegm(struct tm* tm) {
   time_t ret;
   char* tz;
   tz = getenv("TZ");
+#ifdef _WIN32
+  _putenv_s("TZ", "UTC");
+  _tzset();
+  ret = mktime(tm);
+  if (tz)
+    _putenv_s("TZ", tz);
+  else
+    _putenv_s("TZ", "");
+  _tzset();
+#else
   setenv("TZ", "UTC", 1);
   tzset();
   ret = mktime(tm);
@@ -3132,6 +3142,7 @@ time_t Datetime::timegm(struct tm* tm) {
   else
     unsetenv("TZ");
   tzset();
+#endif
   return ret;
 }
 #endif