bindings/npruntime.cpp

   1 /*
   2  * Copyright (C) 2004, 2006 Apple Computer, 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 COMPUTER, INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27
  28 #if ENABLE(NETSCAPE_API)
  29
  30 #include "npruntime_internal.h"
  31 #include "npruntime_impl.h"
  32 #include "npruntime_priv.h"
  33
  34 #include "JSLock.h"
  35 #include "c_utility.h"
  36 #include "identifier.h"
  37 #include <wtf/Assertions.h>
  38 #include <wtf/HashMap.h>
  39
  40 using namespace KJS::Bindings;
  41
  42 typedef HashMap<RefPtr<KJS::UString::Rep>, PrivateIdentifier*> StringIdentifierMap;
  43
  44 static StringIdentifierMap* getStringIdentifierMap()
  45 {
  46     static StringIdentifierMap* stringIdentifierMap = 0;
  47     if (!stringIdentifierMap)
  48         stringIdentifierMap = new StringIdentifierMap;
  49     return stringIdentifierMap;
  50 }
  51
  52 typedef HashMap<int, PrivateIdentifier*> IntIdentifierMap;
  53
  54 static IntIdentifierMap* getIntIdentifierMap()
  55 {
  56     static IntIdentifierMap* intIdentifierMap = 0;
  57     if (!intIdentifierMap)
  58         intIdentifierMap = new IntIdentifierMap;
  59     return intIdentifierMap;
  60 }
  61
  62 NPIdentifier _NPN_GetStringIdentifier(const NPUTF8* name)
  63 {
  64     ASSERT(name);
  65
  66     if (name) {
  67         PrivateIdentifier* identifier = 0;
  68
  69         KJS::JSLock lock;
  70
  71         identifier = getStringIdentifierMap()->get(identifierFromNPIdentifier(name).ustring().rep());
  72         if (identifier == 0) {
  73             identifier = (PrivateIdentifier*)malloc(sizeof(PrivateIdentifier));
  74             // We never release identifier names, so this dictionary will grow, as will
  75             // the memory for the identifier name strings.
  76             identifier->isString = true;
  77             identifier->value.string = strdup(name);
  78
  79             getStringIdentifierMap()->set(identifierFromNPIdentifier(name).ustring().rep(), identifier);
  80         }
  81         return (NPIdentifier)identifier;
  82     }
  83
  84     return 0;
  85 }
  86
  87 void _NPN_GetStringIdentifiers(const NPUTF8** names, int32_t nameCount, NPIdentifier* identifiers)
  88 {
  89     ASSERT(names);
  90     ASSERT(identifiers);
  91
  92     if (names && identifiers)
  93         for (int i = 0; i < nameCount; i++)
  94             identifiers[i] = _NPN_GetStringIdentifier(names[i]);
  95 }
  96
  97 NPIdentifier _NPN_GetIntIdentifier(int32_t intid)
  98 {
  99     PrivateIdentifier* identifier;
 100
 101     if (intid == 0 || intid == -1) {
 102         static PrivateIdentifier* negativeOneAndZeroIdentifiers[2];
 103
 104         identifier = negativeOneAndZeroIdentifiers[intid + 1];
 105         if (!identifier) {
 106             identifier = (PrivateIdentifier*)malloc(sizeof(PrivateIdentifier));
 107             identifier->isString = false;
 108             identifier->value.number = intid;
 109
 110             negativeOneAndZeroIdentifiers[intid + 1] = identifier;
 111         }
 112     } else {
 113         identifier = getIntIdentifierMap()->get(intid);
 114         if (!identifier) {
 115             identifier = (PrivateIdentifier*)malloc(sizeof(PrivateIdentifier));
 116             // We never release identifier names, so this dictionary will grow.
 117             identifier->isString = false;
 118             identifier->value.number = intid;
 119
 120             getIntIdentifierMap()->set(intid, identifier);
 121         }
 122     }
 123     return (NPIdentifier)identifier;
 124 }
 125
 126 bool _NPN_IdentifierIsString(NPIdentifier identifier)
 127 {
 128     PrivateIdentifier* i = (PrivateIdentifier*)identifier;
 129     return i->isString;
 130 }
 131
 132 NPUTF8 *_NPN_UTF8FromIdentifier(NPIdentifier identifier)
 133 {
 134     PrivateIdentifier* i = (PrivateIdentifier*)identifier;
 135     if (!i->isString || !i->value.string)
 136         return NULL;
 137
 138     return (NPUTF8 *)strdup(i->value.string);
 139 }
 140
 141 int32_t _NPN_IntFromIdentifier(NPIdentifier identifier)
 142 {
 143     PrivateIdentifier* i = (PrivateIdentifier*)identifier;
 144     if (!i->isString)
 145         return 0;
 146     return i->value.number;
 147 }
 148
 149 void NPN_InitializeVariantWithStringCopy(NPVariant* variant, const NPString* value)
 150 {
 151     variant->type = NPVariantType_String;
 152     variant->value.stringValue.UTF8Length = value->UTF8Length;
 153     variant->value.stringValue.UTF8Characters = (NPUTF8 *)malloc(sizeof(NPUTF8) * value->UTF8Length);
 154     memcpy((void*)variant->value.stringValue.UTF8Characters, value->UTF8Characters, sizeof(NPUTF8) * value->UTF8Length);
 155 }
 156
 157 void _NPN_ReleaseVariantValue(NPVariant* variant)
 158 {
 159     ASSERT(variant);
 160
 161     if (variant->type == NPVariantType_Object) {
 162         _NPN_ReleaseObject(variant->value.objectValue);
 163         variant->value.objectValue = 0;
 164     } else if (variant->type == NPVariantType_String) {
 165         free((void*)variant->value.stringValue.UTF8Characters);
 166         variant->value.stringValue.UTF8Characters = 0;
 167         variant->value.stringValue.UTF8Length = 0;
 168     }
 169
 170     variant->type = NPVariantType_Void;
 171 }
 172
 173 NPObject *_NPN_CreateObject(NPP npp, NPClass* aClass)
 174 {
 175     ASSERT(aClass);
 176
 177     if (aClass) {
 178         NPObject* obj;
 179         if (aClass->allocate != NULL)
 180             obj = aClass->allocate(npp, aClass);
 181         else
 182             obj = (NPObject*)malloc(sizeof(NPObject));
 183
 184         obj->_class = aClass;
 185         obj->referenceCount = 1;
 186
 187         return obj;
 188     }
 189
 190     return 0;
 191 }
 192
 193 NPObject* _NPN_RetainObject(NPObject* obj)
 194 {
 195     ASSERT(obj);
 196
 197     if (obj)
 198         obj->referenceCount++;
 199
 200     return obj;
 201 }
 202
 203 void _NPN_ReleaseObject(NPObject* obj)
 204 {
 205     ASSERT(obj);
 206     ASSERT(obj->referenceCount >= 1);
 207
 208     if (obj && obj->referenceCount >= 1) {
 209         if (--obj->referenceCount == 0)
 210             _NPN_DeallocateObject(obj);
 211     }
 212 }
 213
 214 void _NPN_DeallocateObject(NPObject *obj)
 215 {
 216     ASSERT(obj);
 217
 218     if (obj) {
 219         if (obj->_class->deallocate)
 220             obj->_class->deallocate(obj);
 221         else
 222             free(obj);
 223     }
 224 }
 225
 226 #endif // ENABLE(NETSCAPE_API)