From 09d4125ff164f5ca686d12ccb0790c35ce721a6b Mon Sep 17 00:00:00 2001
From: Matthew Hodgson <matthew@matrix.org>
Date: Sat, 27 Jun 2015 01:15:23 +0200
Subject: Rename axolotlpp as olm to avoid confusion with Axolotl-the-spec and
 Axolotl-the-OWS-libraries at moxie's request

---
 include/olm/list.hh | 119 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 include/olm/list.hh

(limited to 'include/olm/list.hh')

diff --git a/include/olm/list.hh b/include/olm/list.hh
new file mode 100644
index 0000000..e4bf951
--- /dev/null
+++ b/include/olm/list.hh
@@ -0,0 +1,119 @@
+/* Copyright 2015 OpenMarket Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef OLM_LIST_HH_
+#define OLM_LIST_HH_
+
+#include <cstddef>
+
+namespace olm {
+
+template<typename T, std::size_t max_size>
+class List {
+public:
+    List() : _end(_data) {}
+
+    typedef T * iterator;
+    typedef T const * const_iterator;
+
+    T * begin() { return _data; }
+    T * end() { return _end; }
+    T const * begin() const { return _data; }
+    T const * end() const { return _end; }
+
+    /**
+     * Is the list empty?
+     */
+    bool empty() const { return _end == _data; }
+
+    /**
+     * The number of items in the list.
+     */
+    std::size_t size() const { return _end - _data; }
+
+    T & operator[](std::size_t index) { return _data[index]; }
+
+    T const & operator[](std::size_t index) const { return _data[index]; }
+
+    /**
+     * Erase the item from the list at the given position.
+     */
+    void erase(T * pos) {
+        --_end;
+        while (pos != _end) {
+            *pos = *(pos + 1);
+            ++pos;
+        }
+    }
+
+    /**
+     * Make space for an item in the list at a given position.
+     * If inserting the item makes the list longer than max_size then
+     * the end of the list is discarded.
+     * Returns the where the item is inserted.
+     */
+    T * insert(T * pos) {
+        if (_end != _data + max_size) {
+            ++_end;
+        } else if (pos == _end) {
+            --pos;
+        }
+        T * tmp = pos;
+        while (tmp != _end - 1) {
+            *(tmp + 1) = *tmp;
+            ++tmp;
+        }
+        return pos;
+    }
+
+    /**
+     * Make space for an item in the list at the start of the list
+     */
+    T * insert() { return insert(begin()); }
+
+    /**
+     * Insert an item into the list at a given position.
+     * If inserting the item makes the list longer than max_size then
+     * the end of the list is discarded.
+     * Returns the where the item is inserted.
+     */
+    T * insert(T * pos, T const & value) {
+        pos = insert(pos);
+        *pos = value;
+        return pos;
+    }
+
+    List<T, max_size> & operator=(List<T, max_size> const & other) {
+        if (this == &other) {
+            return *this;
+        }
+        T * this_pos = _data;
+        T * const other_pos = other._data;
+        while (other_pos != other._end) {
+            *this_pos = *other;
+            ++this_pos;
+            ++other_pos;
+        }
+        _end = this_pos;
+        return *this;
+    }
+
+private:
+    T * _end;
+    T _data[max_size];
+};
+
+} // namespace olm
+
+#endif /* OLM_LIST_HH_ */
-- 
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