Migrate to CreateFileW

win32/File.c

@@ -2,6 +2,10 @@
 #include <windows.h>
 #include <assert.h>
 
+#ifndef MAX_PATH
+#define MAX_PATH 260
+#endif
+
 struct CgeFile {
     HANDLE handle;
     int flags;
@@ -9,6 +13,21 @@ struct CgeFile {
     int lastError;
 };
 
+static int utf8ToWchar(const char *utf8, wchar_t *out, int size) {
+    int len;
+
+    if (size <= 0)
+        return 0;
+
+    len = MultiByteToWideChar(CP_UTF8, 0, utf8, -1, out, size);
+    if (len <= 0 || len > size) {
+        out[0] = L'\0';
+        return 0;
+    }
+
+    return 1;
+}
+
 static int errorCodeFromError(void) {
     DWORD error;
 
@@ -52,6 +71,7 @@ static int errorCodeFromError(void) {
 
 static int fileInit(CgeFile *file, const char *path, int mode) {
     DWORD access = 0, how = 0;
+    wchar_t pathW[MAX_PATH];
 
     assert(file != NULL);
     assert(path != NULL);
@@ -83,9 +103,12 @@ static int fileInit(CgeFile *file, const char *path, int mode) {
         }
     }
 
+    if (!utf8ToWchar(path, pathW, MAX_PATH))
+        return CGE_FILE_ENAMETOOLONG;
+
     file->flags = 0;
     file->mode = mode;
-    file->handle = CreateFileA(path, access, FILE_SHARE_READ, NULL, how, FILE_ATTRIBUTE_NORMAL, NULL);
+    file->handle = CreateFileW(pathW, access, FILE_SHARE_READ, NULL, how, FILE_ATTRIBUTE_NORMAL, NULL);
 
     if (file->handle == INVALID_HANDLE_VALUE)
         return errorCodeFromError();