added convenience function to add a single byte

2 files changed, 11 insertions, 0 deletions

diff --git a/vespalib/src/tests/data/simple_buffer/simple_buffer_test.cpp b/vespalib/src/tests/data/simple_buffer/simple_buffer_test.cpp
index 41408797b49..5cc62b327ce 100644
--- a/vespalib/src/tests/data/simple_buffer/simple_buffer_test.cpp
+++ b/vespalib/src/tests/data/simple_buffer/simple_buffer_test.cpp
@@ -67,4 +67,10 @@ TEST("simple buffer") {
     }
 }
 
+TEST("require that add works as expected") {
+    SimpleBuffer buf;
+    buf.add('a').add('b').add('c');
+    EXPECT_EQUAL(buf.get(), Memory("abc"));
+}
+
 TEST_MAIN() { TEST_RUN_ALL(); }
diff --git a/vespalib/src/vespa/vespalib/data/simple_buffer.h b/vespalib/src/vespa/vespalib/data/simple_buffer.h
index 3f0d5f975de..ef3b6d284dc 100644
--- a/vespalib/src/vespa/vespalib/data/simple_buffer.h
+++ b/vespalib/src/vespa/vespalib/data/simple_buffer.h
@@ -28,6 +28,11 @@ public:
     Input &evict(size_t bytes) override;
     WritableMemory reserve(size_t bytes) override;
     Output &commit(size_t bytes) override;
+    SimpleBuffer &add(char c) {
+        _data.push_back(c);
+        ++_used;
+        return *this;
+    }
     Memory get() const { return Memory(&_data[0], _used); }
     bool operator==(const SimpleBuffer &rhs) const { return (get() == rhs.get()); }
 };