1 files changed, 46 insertions, 0 deletions
diff --git a/src/win/string.cpp b/src/win/string.cpp
new file mode 100644
index 00000000..84906f6b
--- /dev/null
+++ b/src/win/string.cpp
@@ -0,0 +1,46 @@
+#include "cru/win/string.hpp"
+
+#include "cru/win/exception.hpp"
+
+namespace cru::platform::win {
+std::string ToUtf8String(const std::wstring_view& string) {
+  if (string.empty()) return std::string{};
+
+  const auto length =
+      ::WideCharToMultiByte(CP_UTF8, WC_ERR_INVALID_CHARS, string.data(), -1,
+                            nullptr, 0, nullptr, nullptr);
+  if (length == 0) {
+    throw Win32Error(::GetLastError(),
+                     "Failed to convert wide string to UTF-8.");
+  }
+
+  std::string result;
+  result.resize(length);
+  if (::WideCharToMultiByte(CP_UTF8, WC_ERR_INVALID_CHARS, string.data(), -1,
+                            result.data(), static_cast<int>(result.size()),
+                            nullptr, nullptr) == 0)
+    throw Win32Error(::GetLastError(),
+                     "Failed to convert wide string to UTF-8.");
+  return result;
+}
+
+std::wstring ToUtf16String(const std::string_view& string) {
+  if (string.empty()) return std::wstring{};
+
+  const auto length = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS,
+                                            string.data(), -1, nullptr, 0);
+  if (length == 0) {
+    throw Win32Error(::GetLastError(),
+                     "Failed to convert wide string to UTF-16.");
+  }
+
+  std::wstring result;
+  result.resize(length);
+  if (::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, string.data(), -1,
+                            result.data(),
+                            static_cast<int>(result.size())) == 0)
+    throw win::Win32Error(::GetLastError(),
+                          "Failed to convert wide string to UTF-16.");
+  return result;
+}
+}  // namespace cru::platform::win