From 59b34045097e5e57ecb1d6293c015c80d8553d56 Mon Sep 17 00:00:00 2001
From: handa <handa>
Date: Thu, 6 May 2004 07:07:48 +0000
Subject: [PATCH] (read_name): Argument changed.  Set OTF_NameRecord->ascii. 
 If possible, convert Unicode sequence to ASCII.
 (read_name_table): Adjusted for the change of read_name.
 (read_cmap_table): Signal an error (not-yet-supported) if
 format is 2.  Support for formats, 8, 10, 12.
 (read_value_record): Clear value_record at first.
 (read_lookup_subtable_gpos): Fix for the case subFormat is
 1 and 2. (OTF_open): Check file name extension.

---
 src/otfopen.c |   10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/otfopen.c b/src/otfopen.c
index e1f9d05..f6a0832 100644
--- a/src/otfopen.c
+++ b/src/otfopen.c
@@ -2669,7 +2669,15 @@ OTF_open (char *otf_name)
   void *errret = NULL;
   OTF *otf;
   OTF_InternalData *internal_data;
-
+  int len = strlen (otf_name);
+  const char *ext = otf_name + (len - 4);
+
+  if (len < 4
+      || ext[0] != '.'
+      || (ext[1] != 'O' && ext[1] != 'T' && ext[1] != 'o' && ext[1] != 't')
+      || (ext[2] != 'T' && ext[2] != 't')
+      || (ext[3] != 'F' && ext[3] != 'f'))
+    OTF_ERROR (OTF_ERROR_FILE, otf_name);
   fp = fopen (otf_name, "r");
   if (! fp)
     OTF_ERROR (OTF_ERROR_FILE, otf_name);
-- 
1.7.10.4