Initial VES for DANOS vRouter

[demo.git] / vnfs / VESreporting_vFW5.0_DANOS / evel / evel-library / code / evel_library / hashtable.h

diff --git a/vnfs/VESreporting_vFW5.0_DANOS/evel/evel-library/code/evel_library/hashtable.h b/vnfs/VESreporting_vFW5.0_DANOS/evel/evel-library/code/evel_library/hashtable.h
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+++ b/vnfs/VESreporting_vFW5.0_DANOS/evel/evel-library/code/evel_library/hashtable.h
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+#ifndef HASHTABLE_INCLUDED
+#define HASHTABLE_INCLUDED
+
+/*************************************************************************//**
+ *
+ * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
+ *
+ * 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.
+ *
+ ****************************************************************************/
+
+/**************************************************************************//**
+ * @file
+ * A simple hashtable.
+ *
+ * @note  No thread protection so you will need to use appropriate
+ * synchronization if use spans multiple threads.
+*****************************************************************************/
+
+typedef struct entry_s {
+       char *key;
+       void *value;
+       struct entry_s *next;
+} ENTRY_T;
+
+/**************************************************************************//**
+ * Hashtable structure
+ *****************************************************************************/
+
+typedef struct hashtable_s {
+       size_t size;
+       struct entry_s **table; 
+} HASHTABLE_T;
+
+/**************************************************************************//**
+ * Hashtable initialization.
+ *
+ * Initialize the list supplied to be empty.
+ *
+ * @param   size  Size of hashtable
+
+ * @returns Hashtable pointer
+******************************************************************************/
+/* Create a new hashtable. */
+HASHTABLE_T *ht_create( size_t size );
+
+/**************************************************************************//**
+ * Hash a string for a particular hash table.
+ *
+ * Initialize the list supplied to be empty.
+ *
+ * @param   hashtable    Pointer to the hashtable
+ * @param   key          String
+
+ * @returns hashvalue
+******************************************************************************/
+size_t ht_hash( HASHTABLE_T *hashtable, char *key );
+
+/**************************************************************************//**
+ * Create a key-value pair.
+ *
+ * @param   key     key string
+ * @param   value   value string
+ *
+ * @returns hashtable entry
+******************************************************************************/
+ENTRY_T *ht_newpair( char *key, void *value );
+
+/**************************************************************************//**
+ * Insert a key-value pair into a hash table.
+ *
+ * @param   key     key string
+ * @param   value   value string
+ *
+ * @returns Nothing
+******************************************************************************/
+void ht_set( HASHTABLE_T *hashtable, char *key, void *value );
+
+/**************************************************************************//**
+ *  Retrieve a key-value pair from a hash table.
+ *
+ * @param   key     key string
+ *
+ * @returns  value string
+******************************************************************************/
+void *ht_get( HASHTABLE_T *hashtable, char *key );
+
+#endif