--- /dev/null
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/*
+ * The contents of this file are subject to the Mozilla Public
+ * License Version 1.1 (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.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ *
+ * The Original Code is the Netscape Portable Runtime (NSPR).
+ *
+ * The Initial Developer of the Original Code is Netscape
+ * Communications Corporation. Portions created by Netscape are
+ * Copyright (C) 1998-2000 Netscape Communications Corporation. All
+ * Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the
+ * terms of the GNU General Public License Version 2 or later (the
+ * "GPL"), in which case the provisions of the GPL are applicable
+ * instead of those above. If you wish to allow use of your
+ * version of this file only under the terms of the GPL and not to
+ * allow others to use your version of this file under the MPL,
+ * indicate your decision by deleting the provisions above and
+ * replace them with the notice and other provisions required by
+ * the GPL. If you do not delete the provisions above, a recipient
+ * may use your version of this file under either the MPL or the
+ * GPL.
+ */
+
+#ifndef plhash_h___
+#define plhash_h___
+/*
+ * API to portable hash table code.
+ */
+#include <stdio.h>
+#include <security_asn1/prtypes.h>
+// @@@ for Boolean
+#include <Security/SecBase.h>
+
+PR_BEGIN_EXTERN_C
+
+typedef struct PLHashEntry PLHashEntry;
+typedef struct PLHashTable PLHashTable;
+typedef PRUint32 PLHashNumber;
+#define PL_HASH_BITS 32 /* Number of bits in PLHashNumber */
+typedef PLHashNumber (PR_CALLBACK *PLHashFunction)(const void *key);
+typedef PRIntn (PR_CALLBACK *PLHashComparator)(const void *v1, const void *v2);
+
+#if defined(XP_OS2_VACPP) && defined(VACPP_FLIP) /* for nsSpaceManager.cpp */
+PR_END_EXTERN_C /* and nsHTMLDocument.cpp */
+#endif
+typedef PRIntn (PR_CALLBACK *PLHashEnumerator)(PLHashEntry *he, PRIntn i, void *arg);
+
+#if defined(XP_OS2_VACPP) && defined(VACPP_FLIP)
+PR_BEGIN_EXTERN_C
+#endif
+
+/* Flag bits in PLHashEnumerator's return value */
+#define HT_ENUMERATE_NEXT 0 /* continue enumerating entries */
+#define HT_ENUMERATE_STOP 1 /* stop enumerating entries */
+#define HT_ENUMERATE_REMOVE 2 /* remove and free the current entry */
+#define HT_ENUMERATE_UNHASH 4 /* just unhash the current entry */
+
+typedef struct PLHashAllocOps {
+ void * (PR_CALLBACK *allocTable)(void *pool, PRSize size);
+ void (PR_CALLBACK *freeTable)(void *pool, void *item);
+ PLHashEntry * (PR_CALLBACK *allocEntry)(void *pool, const void *key);
+ void (PR_CALLBACK *freeEntry)(void *pool, PLHashEntry *he, PRUintn flag);
+} PLHashAllocOps;
+
+#define HT_FREE_VALUE 0 /* just free the entry's value */
+#define HT_FREE_ENTRY 1 /* free value and entire entry */
+
+struct PLHashEntry {
+ PLHashEntry *next; /* hash chain linkage */
+ PLHashNumber keyHash; /* key hash function result */
+ const void *key; /* ptr to opaque key */
+ void *value; /* ptr to opaque value */
+};
+
+struct PLHashTable {
+ PLHashEntry **buckets; /* vector of hash buckets */
+ PRUint32 nentries; /* number of entries in table */
+ PRUint32 shift; /* multiplicative hash shift */
+ PLHashFunction keyHash; /* key hash function */
+ PLHashComparator keyCompare; /* key comparison function */
+ PLHashComparator valueCompare; /* value comparison function */
+ const PLHashAllocOps *allocOps; /* allocation operations */
+ void *allocPriv; /* allocation private data */
+#ifdef HASHMETER
+ PRUint32 nlookups; /* total number of lookups */
+ PRUint32 nsteps; /* number of hash chains traversed */
+ PRUint32 ngrows; /* number of table expansions */
+ PRUint32 nshrinks; /* number of table contractions */
+#endif
+};
+
+/*
+ * Create a new hash table.
+ * If allocOps is null, use default allocator ops built on top of malloc().
+ */
+PR_EXTERN(PLHashTable *)
+PL_NewHashTable(PRUint32 numBuckets, PLHashFunction keyHash,
+ PLHashComparator keyCompare, PLHashComparator valueCompare,
+ const PLHashAllocOps *allocOps, void *allocPriv);
+
+PR_EXTERN(void)
+PL_HashTableDestroy(PLHashTable *ht);
+
+/* Higher level access methods */
+PR_EXTERN(PLHashEntry *)
+PL_HashTableAdd(PLHashTable *ht, const void *key, void *value);
+
+PR_EXTERN(Boolean)
+PL_HashTableRemove(PLHashTable *ht, const void *key);
+
+PR_EXTERN(void *)
+PL_HashTableLookup(PLHashTable *ht, const void *key);
+
+PR_EXTERN(void *)
+PL_HashTableLookupConst(PLHashTable *ht, const void *key);
+
+PR_EXTERN(PRIntn)
+PL_HashTableEnumerateEntries(PLHashTable *ht, PLHashEnumerator f, void *arg);
+
+/* General-purpose C string hash function. */
+PR_EXTERN(PLHashNumber)
+PL_HashString(const void *key);
+
+/* Compare strings using strcmp(), return true if equal. */
+PR_EXTERN(PRIntn)
+PL_CompareStrings(const void *v1, const void *v2);
+
+/* Stub function just returns v1 == v2 */
+PR_EXTERN(PRIntn)
+PL_CompareValues(const void *v1, const void *v2);
+
+/* Low level access methods */
+PR_EXTERN(PLHashEntry **)
+PL_HashTableRawLookup(PLHashTable *ht, PLHashNumber keyHash, const void *key);
+
+PR_EXTERN(PLHashEntry **)
+PL_HashTableRawLookupConst(PLHashTable *ht, PLHashNumber keyHash,
+ const void *key);
+
+PR_EXTERN(PLHashEntry *)
+PL_HashTableRawAdd(PLHashTable *ht, PLHashEntry **hep, PLHashNumber keyHash,
+ const void *key, void *value);
+
+PR_EXTERN(void)
+PL_HashTableRawRemove(PLHashTable *ht, PLHashEntry **hep, PLHashEntry *he);
+
+/* This can be trivially implemented using PL_HashTableEnumerateEntries. */
+PR_EXTERN(PRIntn)
+PL_HashTableDump(PLHashTable *ht, PLHashEnumerator dump, FILE *fp);
+
+PR_END_EXTERN_C
+
+#endif /* plhash_h___ */
projects / apple / security.git / blobdiff