Sterling Hughes' provided initial DNS cache source code.

lib/hash.h

@@ -0,0 +1,86 @@
+#ifndef __HASH_H
+#define __HASH_H
+/*****************************************************************************
+ *                                  _   _ ____  _     
+ *  Project                     ___| | | |  _ \| |    
+ *                             / __| | | | |_) | |    
+ *                            | (__| |_| |  _ <| |___ 
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 2000, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * In order to be useful for every potential user, curl and libcurl are
+ * dual-licensed under the MPL and the MIT/X-derivate licenses.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the MPL or the MIT/X-derivate
+ * licenses. You may pick one of these licenses.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ * $Id$
+ *****************************************************************************/
+
+#include "setup.h"
+
+#include "setup.h"
+
+#include <stddef.h>
+
+#include "llist.h"
+
+#define CURL_HASH_KEY_IS_STRING 0
+#define CURL_HASH_KEY_IS_NUM    1
+
+typedef void (*curl_hash_dtor)(void *);
+
+typedef struct _curl_hash {
+  curl_llist     **table;
+  curl_hash_dtor   dtor;
+  int              slots;
+  size_t           size;
+} curl_hash;
+
+typedef struct _curl_hash_key {
+  union {
+    struct {
+      char *val;
+      unsigned int len;
+    } str;
+
+    unsigned long num;
+  } value;
+
+  int type;
+} curl_hash_key;
+
+typedef struct _curl_hash_element {
+  curl_hash_key  key;
+  void          *ptr;
+} curl_hash_element;
+
+
+void curl_hash_init(curl_hash *h, int slots, curl_hash_dtor dtor);
+curl_hash *curl_hash_alloc(int slots, curl_hash_dtor dtor);
+int curl_hash_add_or_update(curl_hash *h, char *str_key, unsigned int str_key_len, 
+			     unsigned long num_key, const void *p);
+int curl_hash_extended_delete(curl_hash *h, char *str_key, unsigned int str_key_len, 
+			       unsigned long num_key);
+int curl_hash_extended_find(curl_hash *h, char *str_key, unsigned int str_key_len, 
+			     unsigned long num_key, void **p);
+void curl_hash_apply(curl_hash *h, void *user, void (*cb)(void *, curl_hash_element *));
+void curl_hash_clean(curl_hash *h);
+void curl_hash_destroy(curl_hash *h);
+
+#define curl_hash_find(h, key, key_len, p) curl_hash_extended_find(h, key, key_len, 0, p)
+#define curl_hash_delete(h, key, key_len) curl_hash_extended_delete(h, key, key_len, 0)
+#define curl_hash_add(h, key, key_len, p) curl_hash_add_or_update(h, key, key_len, 0, p)
+#define curl_hash_update curl_hash_add
+#define curl_hash_index_find(h, key, p) curl_hash_extended_find(h, NULL, 0, key, p)
+#define curl_hash_index_delete(h, key) curl_hash_extended_delete(h, NULL, 0, key)
+#define curl_hash_index_add(h, key, p) curl_hash_add_or_update(h, NULL, 0, key, p)
+#define curl_hash_index_update curl_hash_index_add
+
+#endif