Do sanitization before the use on 'main' mini-program (#994)

src/main.cc

@@ -51,11 +51,15 @@ main (int argc, char **argv)
 
   const char *font_data = nullptr;
   int len = 0;
+  hb_destroy_func_t destroy;
+  hb_memory_mode_t mm;
 
 #ifdef HAVE_GLIB
   GMappedFile *mf = g_mapped_file_new (argv[1], false, nullptr);
   font_data = g_mapped_file_get_contents (mf);
   len = g_mapped_file_get_length (mf);
+  destroy = (hb_destroy_func_t) g_mapped_file_unref;
+  mm = HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE;
 #else
   FILE *f = fopen (argv[1], "rb");
   fseek (f, 0, SEEK_END);
@@ -63,11 +67,23 @@ main (int argc, char **argv)
   fseek (f, 0, SEEK_SET);
   font_data = (const char *) malloc (len);
   len = fread ((char *) font_data, 1, len, f);
+  destroy = free;
+  mm = HB_MEMORY_MODE_WRITABLE;
 #endif
 
   printf ("Opened font file %s: %d bytes long\n", argv[1], len);
 
-  const OpenTypeFontFile &ot = *CastP<OpenTypeFontFile> (font_data);
+  Sanitizer<OpenTypeFontFile> sanitizer;
+  hb_blob_t *blob = hb_blob_create (font_data, len, mm, (void *) font_data, destroy);
+  hb_blob_t *font_blob = sanitizer.sanitize (blob);
+  const OpenTypeFontFile* sanitized = Sanitizer<OpenTypeFontFile>::lock_instance (font_blob);
+  if (sanitized == &Null (OpenTypeFontFile))
+  {
+    printf ("Sanitization of the file wasn't successful. Exit");
+    return 1;
+  }
+  const OpenTypeFontFile& ot = *sanitized;
+
 
   switch (ot.get_tag ()) {
   case OpenTypeFontFile::TrueTypeTag:
@@ -101,7 +117,7 @@ main (int argc, char **argv)
     for (int n_table = 0; n_table < num_tables; n_table++) {
       const OpenTypeTable &table = font.get_table (n_table);
       printf ("  Table %2d of %2d: %.4s (0x%08x+0x%08x)\n", n_table, num_tables,
-	      (const char *)table.tag,
+	      (const char *) table.tag,
 	      (unsigned int) table.offset,
 	      (unsigned int) table.length);
 
@@ -197,5 +213,3 @@ main (int argc, char **argv)
 
   return 0;
 }
-
-