hooklib/path.c: add slash-insensitive path comparison API

hooklib/path.c

@@ -388,6 +388,35 @@ end:
     return ok;
 }
 
+int path_compare_w(const wchar_t *string1, const wchar_t *string2, size_t count)
+{
+    size_t i;
+    wchar_t c1, c2;
+
+    assert(string1 != NULL);
+    assert(string2 != NULL);
+
+    for (i = 0; i < count && string1[i] && string2[i]; i++) {
+        c1 = towlower(string1[i]);
+
+        if (c1 == '/') {
+            c1 = '\\';
+        }
+
+        c2 = towlower(string2[i]);
+
+        if (c2 == '/') {
+            c2 = '\\';
+        }
+
+        if (c1 != c2) {
+            break;
+        }
+    }
+
+    return i == count ? 0 : string2[i] - string1[i];
+}
+
 /* Dumping ground for kernel32 file system ops whose path parameters we have to
    hook into and translate. This list will grow over time as we go back and
    fix up older games that don't pay attention to the mount point registry. */

hooklib/path.h

@@ -10,3 +10,4 @@ typedef HRESULT (*path_hook_t)(
         size_t *count);
 
 HRESULT path_hook_push(path_hook_t hook);
+int path_compare_w(const wchar_t *string1, const wchar_t *string2, size_t count);

platform/vfs.c

@@ -273,7 +273,7 @@ static HRESULT vfs_path_hook_nthome(
 
     /* Case-insensitive check to see if src starts with vfs_nthome */
 
-    if (_wcsnicmp(src, vfs_nthome, vfs_nthome_len) != 0) {
+    if (path_compare_w(src, vfs_nthome, vfs_nthome_len) != 0) {
         return S_FALSE;
     }