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/*
* Copyright (c) 2017 Cisco and/or its affiliates.
* 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 <config.h>
#include <stdio.h>
#include <parc/algol/parc_Memory.h>
#include <parc/algol/parc_Hash.h>
#include <ccnx/forwarder/metis/processor/metis_HashTableFunction.h>
#include <ccnx/forwarder/metis/core/metis_Message.h>
#include <LongBow/runtime.h>
// ======================================================================
// Hash table key functions
// We use a MetisMessage as the key data type
bool
metisHashTableFunction_MessageNameEquals(const void *keyA, const void *keyB)
{
const MetisMessage *a = (const MetisMessage *) keyA;
const MetisMessage *b = (const MetisMessage *) keyB;
return metisTlvName_Equals(metisMessage_GetName(a), metisMessage_GetName(b));
}
HashCodeType
metisHashTableFunction_MessageNameHashCode(const void *keyA)
{
const MetisMessage *message = (const MetisMessage *) keyA;
MetisTlvName *name = metisMessage_GetName(message);
// we want the cumulative hash for the whole name
uint32_t hash = metisTlvName_HashCode(name);
return hash;
}
bool
metisHashTableFunction_MessageNameAndKeyIdEquals(const void *keyA, const void *keyB)
{
const MetisMessage *a = (const MetisMessage *) keyA;
const MetisMessage *b = (const MetisMessage *) keyB;
if (metisMessage_KeyIdEquals(a, b)) {
if (metisTlvName_Equals(metisMessage_GetName(a), metisMessage_GetName(b))) {
return true;
}
}
return false;
}
HashCodeType
metisHashTableFunction_MessageNameAndKeyIdHashCode(const void *keyA)
{
const MetisMessage *message = (const MetisMessage *) keyA;
uint32_t keyIdHash;
bool hasKeyId = metisMessage_GetKeyIdHash(message, &keyIdHash);
assertTrue(hasKeyId, "Called NameAndKeyIdHashCode for a message without a keyid");
// we want the cumulative hash for the whole name
MetisTlvName *name = metisMessage_GetName(message);
uint32_t nameHash = metisTlvName_HashCode(name);
// now combine the two hashes. The KeyId hash is mixed in to the name hash.
uint32_t hash = parcHash32_Data_Cumulative(&keyIdHash, sizeof(keyIdHash), nameHash);
return hash;
}
bool
metisHashTableFunction_MessageNameAndObjectHashEquals(const void *keyA, const void *keyB)
{
const MetisMessage *a = (const MetisMessage *) keyA;
const MetisMessage *b = (const MetisMessage *) keyB;
// due to lazy calculation of hash in content objects, need non-const
if (metisMessage_ObjectHashEquals((MetisMessage *) a, (MetisMessage *) b)) {
if (metisTlvName_Equals(metisMessage_GetName(a), metisMessage_GetName(b))) {
return true;
}
}
return false;
}
HashCodeType
metisHashTableFunction_MessageNameAndObjectHashHashCode(const void *keyA)
{
const MetisMessage *message = (const MetisMessage *) keyA;
uint32_t contentObjectHashHash;
bool hasObjectHash = metisMessage_GetContentObjectHashHash((MetisMessage *) message, &contentObjectHashHash);
assertTrue(hasObjectHash, "Called metisPit_NameAndObjectHashHashCode for an interest without a ContentObjectHash restriction");
// we want the cumulative hash for the whole name
MetisTlvName *name = metisMessage_GetName(message);
uint32_t nameHash = metisTlvName_HashCode(name);
// now combine the two hashes
uint32_t hash = parcHash32_Data_Cumulative(&contentObjectHashHash, sizeof(contentObjectHashHash), nameHash);
return hash;
}
// ======================================================================
// TlvName variety
bool
metisHashTableFunction_TlvNameEquals(const void *keyA, const void *keyB)
{
const MetisTlvName *a = (const MetisTlvName *) keyA;
const MetisTlvName *b = (const MetisTlvName *) keyB;
return metisTlvName_Equals(a, b);
}
int
metisHashTableFunction_TlvNameCompare(const void *keyA, const void *keyB)
{
const MetisTlvName *a = (const MetisTlvName *) keyA;
const MetisTlvName *b = (const MetisTlvName *) keyB;
return metisTlvName_Compare(a, b);
}
HashCodeType
metisHashTableFunction_TlvNameHashCode(const void *keyA)
{
MetisTlvName *name = (MetisTlvName *) keyA;
// we want the cumulative hash for the whole name
uint32_t hash = metisTlvName_HashCode(name);
return hash;
}
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