1/*
2 * Copyright (C) 2010 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "NPRuntimeUtilities.h"
28
29#if ENABLE(NETSCAPE_PLUGIN_API)
30
31#include <string.h>
32#include <wtf/text/CString.h>
33
34namespace WebKit {
35
36void* npnMemAlloc(uint32_t size)
37{
38    // We could use fastMalloc here, but there might be plug-ins that mix NPN_MemAlloc/NPN_MemFree with malloc and free,
39    // so having them be equivalent seems like a good idea.
40    return malloc(size);
41}
42
43void npnMemFree(void* ptr)
44{
45    // We could use fastFree here, but there might be plug-ins that mix NPN_MemAlloc/NPN_MemFree with malloc and free,
46    // so having them be equivalent seems like a good idea.
47    free(ptr);
48}
49
50NPString createNPString(const CString& string)
51{
52    char* utf8Characters = npnMemNewArray<char>(string.length());
53    memcpy(utf8Characters, string.data(), string.length());
54
55    NPString npString;
56    npString.UTF8Characters = utf8Characters;
57    npString.UTF8Length = string.length();
58
59    return npString;
60}
61
62NPObject* createNPObject(NPP npp, NPClass* npClass)
63{
64    ASSERT(npClass);
65
66    NPObject* npObject;
67    if (npClass->allocate)
68        npObject = npClass->allocate(npp, npClass);
69    else
70        npObject = npnMemNew<NPObject>();
71
72    npObject->_class = npClass;
73    npObject->referenceCount = 1;
74
75    return npObject;
76}
77
78void deallocateNPObject(NPObject* npObject)
79{
80    ASSERT(npObject);
81    if (!npObject)
82        return;
83
84    if (npObject->_class->deallocate)
85        npObject->_class->deallocate(npObject);
86    else
87        npnMemFree(npObject);
88}
89
90void retainNPObject(NPObject* npObject)
91{
92    ASSERT(npObject);
93    if (!npObject)
94        return;
95
96    npObject->referenceCount++;
97}
98
99bool trySafeReleaseNPObject(NPObject* npObject)
100{
101    ASSERT(npObject);
102    if (!npObject)
103        return true;
104
105    ASSERT(npObject->referenceCount >= 1);
106
107    npObject->referenceCount--;
108    if (npObject->referenceCount)
109        return true;
110    if (npObject->_class->deallocate)
111        return false;
112    deallocateNPObject(npObject);
113    return true;
114}
115
116void releaseNPObject(NPObject* npObject)
117{
118    ASSERT(npObject);
119    if (!npObject)
120        return;
121
122    ASSERT(npObject->referenceCount >= 1);
123    npObject->referenceCount--;
124    if (!npObject->referenceCount)
125        deallocateNPObject(npObject);
126}
127
128void releaseNPVariantValue(NPVariant* variant)
129{
130    ASSERT(variant);
131
132    switch (variant->type) {
133    case NPVariantType_Void:
134    case NPVariantType_Null:
135    case NPVariantType_Bool:
136    case NPVariantType_Int32:
137    case NPVariantType_Double:
138        // Nothing to do.
139        break;
140
141    case NPVariantType_String:
142        npnMemFree(const_cast<NPUTF8*>(variant->value.stringValue.UTF8Characters));
143        variant->value.stringValue.UTF8Characters = 0;
144        variant->value.stringValue.UTF8Length = 0;
145        break;
146    case NPVariantType_Object:
147        releaseNPObject(variant->value.objectValue);
148        variant->value.objectValue = 0;
149        break;
150    }
151
152    variant->type = NPVariantType_Void;
153}
154
155} // namespace WebKit
156
157#endif // ENABLE(NETSCAPE_PLUGIN_API)
158