Much faster attribute range lookup - look through short list of attributes and compar...

[pub/USBasp.git] / Demos / Host / Incomplete / BluetoothHost / Lib / ServiceDiscoveryProtocol.c

diff --git a/Demos/Host/Incomplete/BluetoothHost/Lib/ServiceDiscoveryProtocol.c b/Demos/Host/Incomplete/BluetoothHost/Lib/ServiceDiscoveryProtocol.c
index 82cb60e..3731e1f 100644 (file)
--- a/Demos/Host/Incomplete/BluetoothHost/Lib/ServiceDiscoveryProtocol.c
+++ b/Demos/Host/Incomplete/BluetoothHost/Lib/ServiceDiscoveryProtocol.c
@@ -116,11 +116,10 @@ static void SDP_ProcessServiceSearch(const SDP_PDUHeader_t* const SDPHeader, Blu
        /* Search through the list of UUIDs one at a time looking for matching search Attributes */
        for (uint8_t CurrUUIDItem = 0; CurrUUIDItem < TotalUUIDs; CurrUUIDItem++)
        {
+               ServiceAttributeTable_t* AttributeTable;
+
                /* Retrieve the attribute table of the current search UUID from the global UUID table if it exists */
-               ServiceAttributeTable_t* AttributeTable = SDP_GetAttributeTable(UUIDList[CurrUUIDItem]);
-               
-               /* If the UUID does not exist in the global UUID table, continue on to the next search UUID */
-               if (AttributeTable == NULL)
+               if ((AttributeTable = SDP_GetAttributeTable(UUIDList[CurrUUIDItem])) == NULL)
                  continue;
                  
                BT_SDP_DEBUG(2, " -- Found UUID %d in table", CurrUUIDItem);
@@ -216,9 +215,12 @@ static void SDP_ProcessServiceAttribute(const SDP_PDUHeader_t* const SDPHeader,
                /* Get the size of the header for the Service Record Handle */
                uint8_t AttrHeaderSize;
                SDP_GetLocalAttributeContainerSize(ServiceRecord, &AttrHeaderSize);
-
+               
+               /* Retrieve the endian-swapped service handle of the current service being examined */
+               uint32_t CurrServiceHandle = SwapEndian_32(pgm_read_dword(ServiceRecord + AttrHeaderSize));
+               
                /* Check if the current service in the service table has the requested service handle */
-               if (memcmp_P(ServiceRecord + AttrHeaderSize, &ServiceHandle, sizeof(uint32_t)) == 0)
+               if (ServiceHandle == CurrServiceHandle)
                {
                        *TotalResponseSize += SDP_AddListedAttributesToResponse(CurrAttributeTable, AttributeList, TotalAttributes,
                                                                            &CurrResponsePos);
@@ -300,15 +302,15 @@ static void SDP_ProcessServiceSearchAttribute(const SDP_PDUHeader_t* const SDPHe
        /* Search through the list of UUIDs one at a time looking for matching search Attributes */
        for (uint8_t CurrUUIDItem = 0; CurrUUIDItem < TotalUUIDs; CurrUUIDItem++)
        {
+               ServiceAttributeTable_t* AttributeTable;
+
                /* Retrieve the attribute table of the current search UUID from the global UUID table if it exists */
-               ServiceAttributeTable_t* AttributeTable = SDP_GetAttributeTable(UUIDList[CurrUUIDItem]);
-               
-               /* If the UUID does not exist in the global UUID table, continue on to the next search UUID */
-               if (AttributeTable == NULL)
+               if ((AttributeTable = SDP_GetAttributeTable(UUIDList[CurrUUIDItem])) == NULL)
                  continue;
                  
                BT_SDP_DEBUG(2, " -- Found UUID %d in table", CurrUUIDItem);
 
+               /* Add the listed attributes for the found UUID to the response */
                *TotalResponseSize += SDP_AddListedAttributesToResponse(AttributeTable, AttributeList, TotalAttributes,
                                                                        &CurrResponsePos);
        }
@@ -361,21 +363,24 @@ static uint16_t SDP_AddListedAttributesToResponse(const ServiceAttributeTable_t*
        for (uint8_t CurrAttribute = 0; CurrAttribute < TotalAttributes; CurrAttribute++)
        {
                uint16_t* AttributeIDRange = AttributeList[CurrAttribute];
-       
-               /* Look in the current Attribute Range for a matching Attribute ID in the UUID's Attribute table */
-               for (uint32_t CurrAttributeID = AttributeIDRange[0]; CurrAttributeID <= AttributeIDRange[1]; CurrAttributeID++)
+               void*     AttributeValue;
+               
+               /* Look through the current service's attribute list, examining all the attributes */
+               while ((AttributeValue = (void*)pgm_read_word(&AttributeTable->Data)) != NULL)
                {
-                       /* Retrieve a PROGMEM pointer to the value of the current Attribute ID, if it exists in the UUID's Attribute table */
-                       const void* AttributeValue = SDP_GetAttributeValue(AttributeTable, CurrAttributeID);
-                       
-                       /* If the Attribute does not exist in the current UUID's Attribute table, continue to the next Attribute ID */
-                       if (AttributeValue == NULL)
-                         continue;
-                       
-                       BT_SDP_DEBUG(2, " -- Add Attribute 0x%04X", CurrAttributeID);
+                       /* Get the current Attribute's ID from the current attribute table entry */
+                       uint16_t CurrAttributeID = pgm_read_word(&AttributeTable->AttributeID);
+
+                       /* Check if the current Attribute's ID is within the current Attribute range */
+                       if ((CurrAttributeID >= AttributeIDRange[0]) && (CurrAttributeID <= AttributeIDRange[1]))
+                       {
+                               BT_SDP_DEBUG(2, " -- Add Attribute 0x%04X", CurrAttributeID);
 
-                       /* Increment the current UUID's returned Attribute container size by the number of added bytes */
-                       *AttributeListSize += SDP_AddAttributeToResponse(CurrAttributeID, AttributeValue, BufferPos);
+                               /* Increment the current UUID's returned Attribute container size by the number of added bytes */
+                               *AttributeListSize += SDP_AddAttributeToResponse(CurrAttributeID, AttributeValue, BufferPos);                   
+                       }
+                       
+                       AttributeTable++;
                }
 
                /* Increment the outer container size by the number of added bytes */
@@ -551,12 +556,8 @@ static uint8_t SDP_GetUUIDList(uint8_t UUIDList[][UUID_SIZE_BYTES], const void**
                /* Copy over the base UUID value to the free UUID slot in the list */
                memcpy_P(CurrentUUID, &BaseUUID, sizeof(BaseUUID));
 
-               /* Copy over UUID from the container to the free slot - if a short UUID (<= 4 bytes) it replaces the lower
-                  4 bytes of the base UUID, otherwise it replaces the UUID completely */
-               if (UUIDLength <= 4)
-                 memcpy(&CurrentUUID[UUID_SIZE_BYTES - UUIDLength], *CurrentParameter, UUIDLength);
-               else
-                 memcpy(&CurrentUUID[0], *CurrentParameter, UUIDLength);               
+               /* Copy over UUID from the container to the free slot */
+               memcpy(&CurrentUUID[UUID_SIZE_BYTES - UUIDLength], *CurrentParameter, UUIDLength);
                
                BT_SDP_DEBUG(2, "-- UUID (%d): %02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X",
                                UUIDLength,