Diff: common/UUID.cpp

Revision:

107:a20be740075d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/common/UUID.cpp	Wed Jul 23 15:09:23 2014 +0100
@@ -0,0 +1,113 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 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 <stdio.h>
+#include <string.h>
+
+#include "UUID.h"
+
+/**************************************************************************/
+/*!
+    @brief  Creates a new 128-bit UUID
+
+    @note   The UUID is a unique 128-bit (16 byte) ID used to identify
+            different service or characteristics on the BLE device.
+
+    @note   When creating a UUID, the constructor will check if all bytes
+            except bytes 2/3 are equal to 0.  If only bytes 2/3 have a
+            value, the UUID will be treated as a short/BLE UUID, and the
+            .type field will be set to UUID::UUID_TYPE_SHORT.  If any
+            of the bytes outside byte 2/3 have a non-zero value, the UUID
+            will be considered a 128-bit ID, and .type will be assigned
+            as UUID::UUID_TYPE_LONG.
+
+    @param[in]  uuid_base
+                The 128-bit (16-byte) UUID value.  For 128-bit values,
+                assign all 16 bytes.  For 16-bit values, assign the
+                16-bits to byte 2 and 3, and leave the rest of the bytes
+                as 0.
+
+    @section EXAMPLE
+
+    @code
+
+    // Create a short UUID (0x180F)
+    uint8_t shortID[16] = { 0, 0, 0x0F, 0x18, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+    UUID ble_uuid = UUID(shortID);
+    // ble_uuid.type  = UUID_TYPE_SHORT
+    // ble_uuid.value = 0x180F
+
+    // Creeate a long UUID
+    uint8_t longID[16] = { 0x00, 0x11, 0x22, 0x33,
+                           0x44, 0x55, 0x66, 0x77,
+                           0x88, 0x99, 0xAA, 0xBB,
+                           0xCC, 0xDD, 0xEE, 0xFF };
+    UUID custom_uuid = UUID(longID);
+    // custom_uuid.type  = UUID_TYPE_LONG
+    // custom_uuid.value = 0x3322
+    // custom_uuid.base  = 00 11 22 33 44 55 66 77 88 99 AA BB CC DD EE FF
+
+    @endcode
+*/
+/**************************************************************************/
+UUID::UUID(const LongUUID_t longUUID) : type(UUID_TYPE_SHORT), baseUUID(), shortUUID(0)
+{
+    memcpy(baseUUID, longUUID, LENGTH_OF_LONG_UUID);
+    shortUUID = (uint16_t)((longUUID[2] << 8) | (longUUID[3]));
+
+    /* Check if this is a short of a long UUID */
+    unsigned index;
+    for (index = 0; index < LENGTH_OF_LONG_UUID; index++) {
+        if ((index == 2) || (index == 3)) {
+            continue; /* we should not consider bytes 2 and 3 because that's
+                       * where the 16-bit relative UUID is placed. */
+        }
+
+        if (baseUUID[index] != 0) {
+            type = UUID_TYPE_LONG;
+
+            /* zero out the 16-bit part in the base; this will help equate long
+             * UUIDs when they differ only in this 16-bit relative part.*/
+            baseUUID[2] = 0;
+            baseUUID[3] = 0;
+
+            return;
+        }
+    }
+}
+
+/**************************************************************************/
+/*!
+    @brief  Creates a short (16-bit) UUID
+
+    @param[in]  ble_uuid
+                The 16-bit BLE UUID value.
+*/
+/**************************************************************************/
+UUID::UUID(ShortUUID_t shortUUID) : type(UUID_TYPE_SHORT), baseUUID(), shortUUID(shortUUID)
+{
+    /* empty */
+}
+
+/**************************************************************************/
+/*!
+    @brief  UUID destructor
+*/
+/**************************************************************************/
+UUID::~UUID(void)
+{
+}