Fix const correctness in the API

src/hb-fallback-shape-private.hh

@@ -40,7 +40,7 @@ hb_fallback_shape (hb_font_t          *font,
 		   hb_buffer_t        *buffer,
 		   const hb_feature_t *features,
 		   unsigned int        num_features,
-		   const char         *shaper_options);
+		   const char * const *shaper_options);
 
 
 HB_END_DECLS

src/hb-fallback-shape.cc

@@ -33,7 +33,7 @@ hb_fallback_shape (hb_font_t          *font,
 		   hb_buffer_t        *buffer,
 		   const hb_feature_t *features,
 		   unsigned int        num_features,
-		   const char         *shaper_options)
+		   const char * const *shaper_options)
 {
   buffer->guess_properties ();
 

src/hb-ot-shape.cc

@@ -433,7 +433,7 @@ hb_ot_shape (hb_font_t          *font,
 	     hb_buffer_t        *buffer,
 	     const hb_feature_t *features,
 	     unsigned int        num_features,
-	     const char         *shaper_options)
+	     const char * const *shaper_options)
 {
   hb_ot_shape_plan_t plan;
 

src/hb-ot-shape.h

@@ -39,7 +39,7 @@ hb_ot_shape (hb_font_t          *font,
 	     hb_buffer_t        *buffer,
 	     const hb_feature_t *features,
 	     unsigned int        num_features,
-	     const char         *shaper_options);
+	     const char * const *shaper_options);
 
 
 HB_END_DECLS

src/hb-shape.cc

@@ -42,7 +42,7 @@ typedef hb_bool_t (*hb_shape_func_t) (hb_font_t          *font,
 				      hb_buffer_t        *buffer,
 				      const hb_feature_t *features,
 				      unsigned int        num_features,
-				      const char         *shaper_options);
+				      const char * const *shaper_options);
 
 #define HB_SHAPER_IMPLEMENT(name) {#name, hb_##name##_shape}
 static struct hb_shaper_pair_t {
@@ -110,12 +110,12 @@ hb_shape_list_shapers (void)
 }
 
 hb_bool_t
-hb_shape_full (hb_font_t           *font,
-	       hb_buffer_t         *buffer,
-	       const hb_feature_t  *features,
-	       unsigned int         num_features,
-	       const char          *shaper_options,
-	       const char         **shaper_list)
+hb_shape_full (hb_font_t          *font,
+	       hb_buffer_t        *buffer,
+	       const hb_feature_t *features,
+	       unsigned int        num_features,
+	       const char * const *shaper_options,
+	       const char * const *shaper_list)
 {
   if (likely (!shaper_list)) {
     for (unsigned int i = 0; i < ARRAY_LENGTH (shapers); i++)

src/hb-shape.h

@@ -49,12 +49,12 @@ hb_shape (hb_font_t           *font,
 	  unsigned int         num_features);
 
 hb_bool_t
-hb_shape_full (hb_font_t           *font,
-	       hb_buffer_t         *buffer,
-	       const hb_feature_t  *features,
-	       unsigned int         num_features,
-	       const char          *shaper_options,
-	       const char         **shaper_list);
+hb_shape_full (hb_font_t          *font,
+	       hb_buffer_t        *buffer,
+	       const hb_feature_t *features,
+	       unsigned int        num_features,
+	       const char * const *shaper_options,
+	       const char * const *shaper_list);
 
 const char **
 hb_shape_list_shapers (void);

src/hb-uniscribe-shape.cc

@@ -208,7 +208,7 @@ hb_uniscribe_shape (hb_font_t          *font,
 		    hb_buffer_t        *buffer,
 		    const hb_feature_t *features,
 		    unsigned int        num_features,
-		    const char         *shaper_options)
+		    const char * const *shaper_options)
 {
   buffer->guess_properties ();
 

src/hb-uniscribe.h

@@ -39,7 +39,7 @@ hb_uniscribe_shape (hb_font_t          *font,
 		    hb_buffer_t        *buffer,
 		    const hb_feature_t *features,
 		    unsigned int        num_features,
-		    const char         *shaper_options);
+		    const char * const *shaper_options);
 
 
 HB_END_DECLS