From e89448af704e254c35d6427b678dbe40739da101 Mon Sep 17 00:00:00 2001
From: q66 <daniel@octaforge.org>
Date: Sat, 1 Aug 2015 20:16:03 +0100
Subject: [PATCH] add vector push_n

---
 ostd/vector.hh  | 13 +++++++++++++
 tests/vector.cc |  5 ++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/ostd/vector.hh b/ostd/vector.hh
index 11386e2..ebd42d6 100644
--- a/ostd/vector.hh
+++ b/ostd/vector.hh
@@ -305,6 +305,19 @@ public:
         return p_buf.first()[p_len++];
     }
 
+    Range push_n(const T *v, Size n) {
+        reserve(p_len + n);
+        if (IsPod<T>()) {
+            memcpy(p_buf.first() + p_len, v, n * sizeof(T));
+        } else {
+            for (Size i = 0; i < n; ++i)
+                allocator_construct(p_buf.second(),
+                    &p_buf.first()[p_len + i], v[i]);
+        }
+        p_len += n;
+        return Range(&p_buf.first()[p_len - n], &p_buf.first()[p_len]);
+    }
+
     template<typename ...U>
     T &emplace_back(U &&...args) {
         if (p_len == p_cap) reserve(p_len + 1);
diff --git a/tests/vector.cc b/tests/vector.cc
index db094ef..e215a53 100644
--- a/tests/vector.cc
+++ b/tests/vector.cc
@@ -84,7 +84,10 @@ int main() {
     assert(w.front() == 5);
     assert(w.back() == 5);
 
-    assert(to_string(w) == "{5, 5, 4, 5, 5, 5, 5, 5, 5, 5, 5}");
+    int pushn[] = { 3, 2, 1 };
+    w.push_n(pushn, 3);
+
+    assert(to_string(w) == "{5, 5, 4, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 1}");
 
     return 0;
 }
\ No newline at end of file