[Bf-blender-cvs] [bc218feff12] functions: append n times function for vector adaptor

[Jacques Lucke]

Commit: bc218feff12c726bd390a312759a42df72ccb47b
Author: Jacques Lucke
Date:   Wed Aug 28 14:23:10 2019 +0200
Branches: functions
https://developer.blender.org/rBbc218feff12c726bd390a312759a42df72ccb47b

append n times function for vector adaptor

===================================================================

M	source/blender/blenlib/BLI_vector_adaptor.hpp
M	tests/gtests/blenlib/BLI_vector_adaptor_test.cc

===================================================================

diff --git a/source/blender/blenlib/BLI_vector_adaptor.hpp b/source/blender/blenlib/BLI_vector_adaptor.hpp
index 5c85cb0b0f8..a1e316f30fc 100644
--- a/source/blender/blenlib/BLI_vector_adaptor.hpp
+++ b/source/blender/blenlib/BLI_vector_adaptor.hpp
@@ -96,6 +96,13 @@ template<typename T> class VectorAdaptor {
     m_end += 1;
   }
 
+  void append_n_times(const T &value, uint n)
+  {
+    BLI_assert(this->size() + n <= m_capacity);
+    uninitialized_fill_n(m_end, n, value);
+    m_end += n;
+  }
+
   /**
    * Insert multiple elements at the end of the vector.
    * Asserts, when the capacity is exceeded.
diff --git a/tests/gtests/blenlib/BLI_vector_adaptor_test.cc b/tests/gtests/blenlib/BLI_vector_adaptor_test.cc
index b100b5a5d97..f5ceec504db 100644
--- a/tests/gtests/blenlib/BLI_vector_adaptor_test.cc
+++ b/tests/gtests/blenlib/BLI_vector_adaptor_test.cc
@@ -85,3 +85,17 @@ TEST(vector_adaptor, Extend)
   EXPECT_EQ(vec[2], 2);
   EXPECT_EQ(vec[3], 5);
 }
+
+TEST(vector_adaptor, AppendNTimes)
+{
+  int array[6];
+  IntVectorAdaptor vec(array);
+  vec.append_n_times(10, 2);
+  vec.append_n_times(5, 3);
+  EXPECT_EQ(vec.size(), 5);
+  EXPECT_EQ(vec[0], 10);
+  EXPECT_EQ(vec[1], 10);
+  EXPECT_EQ(vec[2], 5);
+  EXPECT_EQ(vec[3], 5);
+  EXPECT_EQ(vec[4], 5);
+}