/[jscoverage]/trunk/js/jshash.h
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Annotation of /trunk/js/jshash.h

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Revision 332 - (hide annotations)
Thu Oct 23 19:03:33 2008 UTC (13 years, 8 months ago) by siliconforks
File MIME type: text/plain
File size: 5923 byte(s)
Add SpiderMonkey from Firefox 3.1b1.

The following directories and files were removed:
correct/, correct.js
liveconnect/
nanojit/
t/
v8/
vprof/
xpconnect/
all JavaScript files (Y.js, call.js, if.js, math-partial-sums.js, md5.js, perfect.js, trace-test.js, trace.js)


1 siliconforks 332 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2     *
3     * ***** BEGIN LICENSE BLOCK *****
4     * Version: MPL 1.1/GPL 2.0/LGPL 2.1
5     *
6     * The contents of this file are subject to the Mozilla Public License Version
7     * 1.1 (the "License"); you may not use this file except in compliance with
8     * the License. You may obtain a copy of the License at
9     * http://www.mozilla.org/MPL/
10     *
11     * Software distributed under the License is distributed on an "AS IS" basis,
12     * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13     * for the specific language governing rights and limitations under the
14     * License.
15     *
16     * The Original Code is Mozilla Communicator client code, released
17     * March 31, 1998.
18     *
19     * The Initial Developer of the Original Code is
20     * Netscape Communications Corporation.
21     * Portions created by the Initial Developer are Copyright (C) 1998
22     * the Initial Developer. All Rights Reserved.
23     *
24     * Contributor(s):
25     *
26     * Alternatively, the contents of this file may be used under the terms of
27     * either of the GNU General Public License Version 2 or later (the "GPL"),
28     * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
29     * in which case the provisions of the GPL or the LGPL are applicable instead
30     * of those above. If you wish to allow use of your version of this file only
31     * under the terms of either the GPL or the LGPL, and not to allow others to
32     * use your version of this file under the terms of the MPL, indicate your
33     * decision by deleting the provisions above and replace them with the notice
34     * and other provisions required by the GPL or the LGPL. If you do not delete
35     * the provisions above, a recipient may use your version of this file under
36     * the terms of any one of the MPL, the GPL or the LGPL.
37     *
38     * ***** END LICENSE BLOCK ***** */
39    
40     #ifndef jshash_h___
41     #define jshash_h___
42     /*
43     * API to portable hash table code.
44     */
45     #include <stddef.h>
46     #include <stdio.h>
47     #include "jstypes.h"
48     #include "jscompat.h"
49    
50     JS_BEGIN_EXTERN_C
51    
52     typedef uint32 JSHashNumber;
53     typedef struct JSHashEntry JSHashEntry;
54     typedef struct JSHashTable JSHashTable;
55    
56     #define JS_HASH_BITS 32
57     #define JS_GOLDEN_RATIO 0x9E3779B9U
58    
59     typedef JSHashNumber (* JSHashFunction)(const void *key);
60     typedef intN (* JSHashComparator)(const void *v1, const void *v2);
61     typedef intN (* JSHashEnumerator)(JSHashEntry *he, intN i, void *arg);
62    
63     /* Flag bits in JSHashEnumerator's return value */
64     #define HT_ENUMERATE_NEXT 0 /* continue enumerating entries */
65     #define HT_ENUMERATE_STOP 1 /* stop enumerating entries */
66     #define HT_ENUMERATE_REMOVE 2 /* remove and free the current entry */
67    
68     typedef struct JSHashAllocOps {
69     void * (*allocTable)(void *pool, size_t size);
70     void (*freeTable)(void *pool, void *item);
71     JSHashEntry * (*allocEntry)(void *pool, const void *key);
72     void (*freeEntry)(void *pool, JSHashEntry *he, uintN flag);
73     } JSHashAllocOps;
74    
75     #define HT_FREE_VALUE 0 /* just free the entry's value */
76     #define HT_FREE_ENTRY 1 /* free value and entire entry */
77    
78     struct JSHashEntry {
79     JSHashEntry *next; /* hash chain linkage */
80     JSHashNumber keyHash; /* key hash function result */
81     const void *key; /* ptr to opaque key */
82     void *value; /* ptr to opaque value */
83     };
84    
85     struct JSHashTable {
86     JSHashEntry **buckets; /* vector of hash buckets */
87     uint32 nentries; /* number of entries in table */
88     uint32 shift; /* multiplicative hash shift */
89     JSHashFunction keyHash; /* key hash function */
90     JSHashComparator keyCompare; /* key comparison function */
91     JSHashComparator valueCompare; /* value comparison function */
92     JSHashAllocOps *allocOps; /* allocation operations */
93     void *allocPriv; /* allocation private data */
94     #ifdef JS_HASHMETER
95     uint32 nlookups; /* total number of lookups */
96     uint32 nsteps; /* number of hash chains traversed */
97     uint32 ngrows; /* number of table expansions */
98     uint32 nshrinks; /* number of table contractions */
99     #endif
100     };
101    
102     /*
103     * Create a new hash table.
104     * If allocOps is null, use default allocator ops built on top of malloc().
105     */
106     extern JS_PUBLIC_API(JSHashTable *)
107     JS_NewHashTable(uint32 n, JSHashFunction keyHash,
108     JSHashComparator keyCompare, JSHashComparator valueCompare,
109     JSHashAllocOps *allocOps, void *allocPriv);
110    
111     extern JS_PUBLIC_API(void)
112     JS_HashTableDestroy(JSHashTable *ht);
113    
114     /* Low level access methods */
115     extern JS_PUBLIC_API(JSHashEntry **)
116     JS_HashTableRawLookup(JSHashTable *ht, JSHashNumber keyHash, const void *key);
117    
118     extern JS_PUBLIC_API(JSHashEntry *)
119     JS_HashTableRawAdd(JSHashTable *ht, JSHashEntry **hep, JSHashNumber keyHash,
120     const void *key, void *value);
121    
122     extern JS_PUBLIC_API(void)
123     JS_HashTableRawRemove(JSHashTable *ht, JSHashEntry **hep, JSHashEntry *he);
124    
125     /* Higher level access methods */
126     extern JS_PUBLIC_API(JSHashEntry *)
127     JS_HashTableAdd(JSHashTable *ht, const void *key, void *value);
128    
129     extern JS_PUBLIC_API(JSBool)
130     JS_HashTableRemove(JSHashTable *ht, const void *key);
131    
132     extern JS_PUBLIC_API(intN)
133     JS_HashTableEnumerateEntries(JSHashTable *ht, JSHashEnumerator f, void *arg);
134    
135     extern JS_PUBLIC_API(void *)
136     JS_HashTableLookup(JSHashTable *ht, const void *key);
137    
138     extern JS_PUBLIC_API(intN)
139     JS_HashTableDump(JSHashTable *ht, JSHashEnumerator dump, FILE *fp);
140    
141     /* General-purpose C string hash function. */
142     extern JS_PUBLIC_API(JSHashNumber)
143     JS_HashString(const void *key);
144    
145     /* Stub function just returns v1 == v2 */
146     extern JS_PUBLIC_API(intN)
147     JS_CompareValues(const void *v1, const void *v2);
148    
149     JS_END_EXTERN_C
150    
151     #endif /* jshash_h___ */

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