Diff: Aggregator.cpp

Revision:

0:744801d5734d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Aggregator.cpp	Mon Mar 24 09:57:40 2014 +0000
@@ -0,0 +1,163 @@
+/*
+ * Aggregator.cpp
+ *
+ * Created on: Nov 1, 2013
+ * * Authors: Vincent Wochnik <v.wochnik@gmail.com>
+ *
+ * Copyright (c) 2013 Cumulocity GmbH
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "Aggregator.h"
+#include <stdlib.h>
+
+#ifndef AGGREGATOR_FIXED_SIZE
+Aggregator::Aggregator(size_t capacity, bool growing, bool copy)
+{
+    _alloc = copy;
+    _growing = growing;
+    _initial = _capacity = capacity;
+    _list = (const DataGenerator**)malloc(_capacity*sizeof(DataGenerator*));
+    _length = 0;
+}
+#else
+Aggregator::Aggregator(bool copy)
+{
+    _alloc = copy;
+    _length = 0;
+}
+#endif
+
+Aggregator::~Aggregator()
+{
+    if (_alloc) {
+        for (size_t n = 0; n < _length; n++)
+            delete _list[n];
+    }
+    #ifndef AGGREGATOR_FIXED_SIZE
+    free(_list);
+    #endif
+}
+
+bool Aggregator::add(const DataGenerator& generator)
+{
+    if (this == &generator)
+        return false;
+    #ifndef AGGREGATOR_FIXED_SIZE
+    if (_length == _capacity) {
+        if (!_growing)
+            return false;
+
+        size_t capacity = _capacity + AGGREGATOR_MEMORY_INCREMENT;
+        const DataGenerator **list = (const DataGenerator**)realloc(_list,
+            capacity*sizeof(DataGenerator*));
+        if (list == NULL)
+            return false;
+        _list = list;
+        _capacity = capacity;
+    }
+    #else
+    if (_length == AGGREGATOR_FIXED_SIZE)
+        return false;
+    #endif
+
+    if (_alloc) {
+        DataGenerator *copy = generator.copy();
+        if (copy == NULL)
+            return false;
+        _list[_length++] = copy;
+    } else {
+        _list[_length++] = &generator;
+    }
+    return true;
+}
+
+void Aggregator::clear()
+{
+    if (_alloc) {
+        for (size_t n = 0; n < _length; n++)
+            delete _list[n];
+    }
+    _length = 0;
+
+    #ifndef AGGREGATOR_FIXED_SIZE
+    if (_growing) {
+        const DataGenerator **list = (const DataGenerator**)realloc(_list,
+            _initial*sizeof(DataGenerator*));
+        if (list == NULL)
+            return;
+        _list = list;
+        _capacity = _initial;
+    }
+    #endif
+}
+
+size_t Aggregator::length()
+{
+    return _length;
+}
+
+bool Aggregator::full()
+{
+    #ifndef AGGREGATOR_FIXED_SIZE
+    return (_growing) ? false : (_length == _capacity);
+    #else
+    return (_length == AGGREGATOR_FIXED_SIZE);
+    #endif
+}
+
+size_t Aggregator::capacity()
+{
+    #ifndef AGGREGATOR_FIXED_SIZE
+    return (_growing) ? 0 : _capacity;
+    #else
+    return AGGREGATOR_FIXED_SIZE;
+    #endif
+}
+
+size_t Aggregator::writeTo(AbstractDataSink& sink) const
+{
+    size_t len = 0;
+    for (size_t n = 0; n < _length; n++)
+        len += _list[n]->writeTo(sink);
+    return len;
+}
+
+size_t Aggregator::writtenLength() const
+{
+    size_t len = 0;
+    for (size_t n = 0; n < _length; n++)
+        len += _list[n]->writtenLength();
+    return len;
+}
+
+DataGenerator* Aggregator::copy() const
+{
+    #ifndef AGGREGATOR_FIXED_SIZE
+    Aggregator *copy = new Aggregator(_length, _growing, true);
+    #else
+    Aggregator *copy = new Aggregator(true);
+    #endif
+    for (size_t n = 0; n < _length; n++)
+        copy->add(*_list[n]);
+    return copy;
+}
+