1 files changed, 19 insertions, 0 deletions
diff --git a/src/base/io/OpenFileFlag.cpp b/src/base/io/OpenFileFlag.cpp
new file mode 100644
index 00000000..47069b29
--- /dev/null
+++ b/src/base/io/OpenFileFlag.cpp
@@ -0,0 +1,19 @@
+#include "cru/base/io/OpenFileFlag.h"
+
+namespace cru::io {
+bool CheckOpenFileFlag(OpenFileFlag flags) {
+  auto has = [flags](OpenFileFlag flag) { return flags & flag; };
+
+  if ((has(OpenFileFlags::Append) || has(OpenFileFlags::Truncate) ||
+       has(OpenFileFlags::Create)) &&
+      !has(OpenFileFlags::Write)) {
+    return false;
+  }
+
+  if (has(OpenFileFlags::Truncate) && has(OpenFileFlags::Append)) {
+    return false;
+  }
+
+  return true;
+}
+}  // namespace cru::io