[util] Remove main_font_text_t class, use bare function

util/hb-ot-shape-closure.cc

@@ -113,6 +113,5 @@ struct shape_closure_consumer_t
 int
 main (int argc, char **argv)
 {
-  main_font_text_t<shape_closure_consumer_t, font_options_t, text_options_t> driver;
-  return driver.main (argc, argv);
+  return main_font_text<shape_closure_consumer_t, font_options_t, text_options_t> (argc, argv);
 }

util/hb-shape.cc

@@ -159,7 +159,7 @@ struct output_buffer_t
 int
 main (int argc, char **argv)
 {
-  using driver_t = main_font_text_t<shape_consumer_t<output_buffer_t>, font_options_t, text_options_t>;
+  auto main_func = main_font_text<shape_consumer_t<output_buffer_t>, font_options_t, text_options_t>;
 
   if (argc == 2 && !strcmp (argv[1], "--batch"))
   {
@@ -185,13 +185,11 @@ main (int argc, char **argv)
 	start_offset = argc == 2 && p[0] != '\0' && p[0] != ':' && p[1] == ':' && (p[2] == '\\' || p[2] == '/') ? 2 : 0;
       }
 
-      driver_t driver;
-      ret |= driver.main (argc, args, EOF);
+      ret |= main_func (argc, args, EOF);
       fflush (stdout);
     }
     return ret;
   }
 
-  driver_t driver;
-  return driver.main (argc, argv);
+  return main_func (argc, argv, '\n');
 }

util/hb-subset.cc

@@ -132,7 +132,7 @@ struct subset_consumer_t : subset_options_t
 int
 main (int argc, char **argv)
 {
-  using driver_t = main_font_text_t<subset_consumer_t, face_options_t, text_options_t>;
+  auto main_func = main_font_text<subset_consumer_t, face_options_t, text_options_t>;
 
   if (argc == 2 && !strcmp (argv[1], "--batch"))
   {
@@ -156,8 +156,7 @@ main (int argc, char **argv)
 	args[argc++] = p = e;
       }
 
-      driver_t driver;
-      int result = driver.main (argc, args, EOF);
+      int result = main_func (argc, args, EOF);
       fprintf (stdout, result == 0 ? "success\n" : "failure\n");
       fflush (stdout);
       ret |= result;
@@ -165,6 +164,5 @@ main (int argc, char **argv)
     return ret;
   }
 
-  driver_t driver;
-  return driver.main (argc, argv);
+  return main_func (argc, argv, '\n');
 }

util/hb-view.cc

@@ -35,6 +35,5 @@ const unsigned SUBPIXEL_BITS = 6;
 int
 main (int argc, char **argv)
 {
-  main_font_text_t<shape_consumer_t<view_cairo_t>, font_options_t, text_options_t> driver;
-  return driver.main (argc, argv);
+  return main_font_text<shape_consumer_t<view_cairo_t>, font_options_t, text_options_t> (argc, argv);
 }

util/main-font-text.hh

@@ -31,27 +31,10 @@
 
 /* main() body for utilities taking font and processing text.*/
 
-static char *
-locale_to_utf8 (char *s)
-{
-  char *t;
-  GError *error = nullptr;
-
-  t = g_locale_to_utf8 (s, -1, nullptr, nullptr, &error);
-  if (!t)
-  {
-     fail (true, "Failed converting text to UTF-8");
-  }
-
-  return t;
-}
-
 template <typename consumer_t, typename font_options_t, typename text_options_t>
-struct main_font_text_t
+int
+main_font_text (int argc, char **argv, int eol = '\n')
 {
-  int
-  main (int argc, char **argv, int eol = '\n')
-  {
 
   font_options_t font_opts;
   text_options_t input;
@@ -83,7 +66,6 @@ struct main_font_text_t
   consumer.finish (&font_opts);
 
   return consumer.failed ? 1 : 0;
-  }
-};
+}
 
 #endif

util/options.hh

@@ -70,6 +70,21 @@ fail (hb_bool_t suggest_help, const char *format, ...)
   exit (1);
 }
 
+static inline char *
+locale_to_utf8 (char *s)
+{
+  char *t;
+  GError *error = nullptr;
+
+  t = g_locale_to_utf8 (s, -1, nullptr, nullptr, &error);
+  if (!t)
+  {
+     fail (true, "Failed converting text to UTF-8");
+  }
+
+  return t;
+}
+
 
 struct option_parser_t
 {