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[factor.git] / vm / os-windows.hpp

diff --git a/vm/os-windows.hpp b/vm/os-windows.hpp
index b6218f59fa50b588f215843cda30aba20e584aba..a21a67361b692a3f7ec9c9e10490cc230303912b 100644 (file)
--- a/vm/os-windows.hpp
+++ b/vm/os-windows.hpp
@@ -1,7 +1,7 @@
 #include <ctype.h>
 
 #ifndef wcslen
-/* for cygwin */
+// for cygwin
 #include <wchar.h>
 #endif
 
@@ -23,7 +23,7 @@
 #undef max
 #endif
 
-/* Difference between Jan 1 00:00:00 1601 and Jan 1 00:00:00 1970 */
+// Difference between Jan 1 00:00:00 1601 and Jan 1 00:00:00 1970
 #define EPOCH_OFFSET 0x019db1ded53e8000LL
 
 namespace factor {
@@ -92,4 +92,36 @@ inline static void breakpoint() { DebugBreak(); }
 
 extern HANDLE boot_thread;
 
+inline static std::string to_utf8(const wchar_t* buffer, int len) {
+  int nChars = ::WideCharToMultiByte(
+    CP_UTF8,
+    0,
+    buffer,
+    len,
+    NULL,
+    0,
+    NULL,
+    NULL);
+  if (nChars == 0) return "";
+
+  std::string newbuffer;
+  newbuffer.resize(nChars) ;
+  ::WideCharToMultiByte(
+    CP_UTF8,
+    0,
+    buffer,
+    len,
+    const_cast<char*>(newbuffer.c_str()),
+    nChars,
+    NULL,
+    NULL);
+  return newbuffer;
+}
+
+inline static std::string to_utf8(const std::wstring& str) {
+  return to_utf8(str.c_str(), (int)str.size());
+}
+
+#define AS_UTF8(ptr) to_utf8(ptr)
+
 }