Diff: mbed-os/features/netsocket/EMACMemoryManager.cpp

Revision:

0:8fdf9a60065b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os/features/netsocket/EMACMemoryManager.cpp	Wed Oct 10 00:33:53 2018 +0000
@@ -0,0 +1,62 @@
+/* Copyright (c) 2018 ARM Limited
+ *
+ * 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.
+ */
+
+#include "EMACMemoryManager.h"
+
+void EMACMemoryManager::copy_to_buf(emac_mem_buf_t *to_buf, const void *ptr, uint32_t len)
+{
+    while (to_buf && len) {
+        void *copy_to_ptr = get_ptr(to_buf);
+        uint32_t copy_to_len = get_len(to_buf);
+
+        if (copy_to_len > len) {
+            copy_to_len = len;
+            len = 0;
+        } else {
+            len -= copy_to_len;
+        }
+
+        memcpy(copy_to_ptr, ptr, copy_to_len);
+        ptr = static_cast<const uint8_t *>(ptr) + copy_to_len;
+
+        to_buf = get_next(to_buf);
+    }
+}
+
+uint32_t EMACMemoryManager::copy_from_buf(void *ptr, uint32_t len, const emac_mem_buf_t *from_buf) const
+{
+    uint32_t copied_len = 0;
+
+    while (from_buf && len) {
+        void *copy_from_ptr = get_ptr(from_buf);
+        uint32_t copy_from_len = get_len(from_buf);
+
+        if (copy_from_len > len) {
+            copy_from_len = len;
+            len = 0;
+        } else {
+            len -= copy_from_len;
+        }
+
+        memcpy(ptr, copy_from_ptr, copy_from_len);
+        ptr = static_cast<uint8_t *>(ptr) + copy_from_len;
+        copied_len += copy_from_len;
+
+        from_buf = get_next(from_buf);
+    }
+
+    return copied_len;
+}
+