Add hb_vector_t::push(const Type &v)

Makes for cleaner code.

src/hb-coretext.cc

@@ -770,10 +770,9 @@ _hb_coretext_shape (hb_shape_plan_t    *shape_plan,
       }
 
       if (event->start) {
-        active_feature_t *feature = active_features.push ();
+        active_feature_t *feature = active_features.push (event->feature);
 	if (unlikely (!feature))
 	  goto fail_features;
-	*feature = event->feature;
       } else {
         active_feature_t *feature = active_features.find (&event->feature);
 	if (feature)

src/hb-ot-post-table.hh

@@ -126,10 +126,9 @@ struct post
       const uint8_t *end = (uint8_t *) table + table_length;
       for (const uint8_t *data = pool; data < end && data + *data <= end; data += 1 + *data)
       {
-	uint32_t *offset = index_to_offset.push ();
+	uint32_t *offset = index_to_offset.push (data - pool);
 	if (unlikely (!offset))
 	  break;
-	*offset = data - pool;
       }
     }
     inline void fini (void)

src/hb-private.hh

@@ -551,9 +551,17 @@ struct hb_vector_t
 
     return &arrayZ[len - 1];
   }
+  inline Type *push (const Type& v)
+  {
+    if (unlikely (!resize (len + 1)))
+      return nullptr;
+
+    arrayZ[len - 1] = v;
+    return &arrayZ[len - 1];
+  }
 
   /* Allocate for size but don't adjust len. */
-  inline bool alloc(unsigned int size)
+  inline bool alloc (unsigned int size)
   {
     if (likely (size <= allocated))
       return true;
@@ -738,9 +746,7 @@ struct hb_lockable_set_t
 	l.unlock ();
       }
     } else {
-      item = items.push ();
+      item = items.push (v);
-      if (likely (item))
-	*item = v;
       l.unlock ();
     }
     return item;
@@ -779,9 +785,7 @@ struct hb_lockable_set_t
     l.lock ();
     item_t *item = items.find (v);
     if (!item) {
-      item = items.push ();
+      item = items.push (v);
-      if (likely (item))
-        *item = v;
     }
     l.unlock ();
     return item;

src/hb-subset-plan.cc

@@ -91,10 +91,8 @@ _populate_codepoints (hb_set_t *input_codepoints,
 {
   plan_codepoints.alloc (hb_set_get_population (input_codepoints));
   hb_codepoint_t cp = -1;
-  while (hb_set_next (input_codepoints, &cp)) {
+  while (hb_set_next (input_codepoints, &cp))
-    hb_codepoint_t *wr = plan_codepoints.push();
+    plan_codepoints.push(cp);
-    *wr = cp;
-  }
   plan_codepoints.qsort (_hb_codepoint_t_cmp);
 }
 
@@ -139,9 +137,9 @@ _populate_gids_to_retain (hb_face_t *face,
     if (!cmap.get_nominal_glyph (codepoints[i], &gid))
     {
       gid = -1;
-      *(bad_indices.push ()) = i;
+      bad_indices.push (i);
     }
-    *(old_gids.push ()) = gid;
+    old_gids.push (gid);
   }
 
   /* Generally there shouldn't be any */
@@ -166,7 +164,7 @@ _populate_gids_to_retain (hb_face_t *face,
   old_gids_sorted.alloc (hb_set_get_population (all_gids_to_retain));
   hb_codepoint_t gid = HB_SET_VALUE_INVALID;
   while (hb_set_next (all_gids_to_retain, &gid))
-    *(old_gids_sorted.push ()) = gid;
+    old_gids_sorted.push (gid);
 
   hb_set_destroy (all_gids_to_retain);
   glyf.fini ();

src/hb-uniscribe.cc

@@ -696,10 +696,8 @@ _hb_uniscribe_shape (hb_shape_plan_t    *shape_plan,
 	{
 	  if (!j || active_features[j].rec.tagFeature != feature_records[feature_records.len - 1].tagFeature)
 	  {
-	    OPENTYPE_FEATURE_RECORD *feature = feature_records.push ();
+	    if (unlikely (!feature_records.push (active_features[j].rec)))
-	    if (unlikely (!feature))
 	      goto fail_features;
-	    *feature = active_features[j].rec;
 	  }
 	  else
 	  {
@@ -719,10 +717,8 @@ _hb_uniscribe_shape (hb_shape_plan_t    *shape_plan,
       }
 
       if (event->start) {
-        active_feature_t *feature = active_features.push ();
+	if (unlikely (!active_features.push (event->feature)))
-	if (unlikely (!feature))
 	  goto fail_features;
-	*feature = event->feature;
       } else {
         active_feature_t *feature = active_features.find (&event->feature);
 	if (feature)