1 files changed, 66 insertions, 0 deletions
diff --git a/src/un_wstrings.c b/src/un_wstrings.c
new file mode 100644
index 0000000..601c809
--- /dev/null
+++ b/src/un_wstrings.c
@@ -0,0 +1,66 @@
+#if defined(OS_WINDOWS)
+wchar* un_wstring_from_string(String utf8_string, Allocator alloc) {
+    return un_wstring_from_cstring(un_string_to_cstring(utf8_string, un_allocator_get_temporary()), alloc);
+}
+
+wchar* un_wstring_from_cstring(u8 *utf8_string, Allocator alloc) {
+    u32 error_code, buffer_size, wrote_chars;
+    wchar *string_buffer;
+    assert(utf8_string != NULL);
+
+    buffer_size = MultiByteToWideChar(
+            CP_UTF8,
+            0, // or MB_PRECOMPOSED
+            (LPCCH)utf8_string,
+            -1,
+            NULL,
+            0
+            );
+
+    if (!buffer_size) {
+        error_code = GetLastError();
+
+        switch (error_code) {
+            case ERROR_NO_UNICODE_TRANSLATION: return NULL; break;
+            default:
+                assert(false);
+                break;
+        }
+
+        return NULL;
+    }
+
+    string_buffer = un_memory_alloc(sizeof(wchar) * buffer_size, alloc);
+
+    if (string_buffer == NULL) {
+        return NULL;
+    }
+
+    wrote_chars = MultiByteToWideChar(
+            CP_UTF8,
+            0, // or MB_PRECOMPOSED
+            (LPCCH)utf8_string,
+            -1,
+            (LPWSTR)string_buffer,
+            buffer_size
+            );
+
+    assert(wrote_chars == buffer_size);
+
+    return string_buffer;
+}
+#else
+
+wchar* un_wstring_from_string(String utf8_string, Allocator alloc) {
+    UNUSED(utf8_string);
+    UNUSED(alloc);
+    __TRAP();
+}
+
+wchar* un_wstring_from_cstring(u8 *utf8_string, Allocator alloc) {
+    UNUSED(utf8_string);
+    UNUSED(alloc);
+    __TRAP();
+}
+
+#endif