modules/plugin/base/src/PluginPRLibrary.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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  16  * The Original Code is Mozilla Plugin App.
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  18  * The Initial Developer of the Original Code is
  19  *   Josh Aas <josh@mozilla.com>
  20  * Portions created by the Initial Developer are Copyright (C) 2009
  21  * the Initial Developer. All Rights Reserved.
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  38
  39 #include "mozilla/PluginPRLibrary.h"
  40
  41 // Some plugins on Windows, notably Quake Live, implement NP_Initialize using
  42 // cdecl instead of the documented stdcall. In order to work around this,
  43 // we force the caller to use a frame pointer.
  44 #if defined(XP_WIN) && defined(_M_IX86)
  45 #include <malloc.h>
  46
  47 // gNotOptimized exists so that the compiler will not optimize the alloca
  48 // below.
  49 static int gNotOptimized;
  50 #define CALLING_CONVENTION_HACK void* foo = _alloca(gNotOptimized);
  51 #else
  52 #define CALLING_CONVENTION_HACK
  53 #endif
  54
  55 namespace mozilla {
  56
  57 #if defined(XP_UNIX) && !defined(XP_MACOSX)
  58 nsresult
  59 PluginPRLibrary::NP_Initialize(NPNetscapeFuncs* bFuncs,
  60                                NPPluginFuncs* pFuncs, NPError* error)
  61 {
  62   if (mNP_Initialize) {
  63     *error = mNP_Initialize(bFuncs, pFuncs);
  64   } else {
  65     NP_InitializeFunc pfNP_Initialize = (NP_InitializeFunc)
  66       PR_FindFunctionSymbol(mLibrary, "NP_Initialize");
  67     if (!pfNP_Initialize)
  68       return NS_ERROR_FAILURE;
  69     *error = pfNP_Initialize(bFuncs, pFuncs);
  70   }
  71
  72   // save NPP_New
  73   mNPP_New = pFuncs->newp;
  74   return NS_OK;
  75 }
  76 #else
  77 nsresult
  78 PluginPRLibrary::NP_Initialize(NPNetscapeFuncs* bFuncs, NPError* error)
  79 {
  80   CALLING_CONVENTION_HACK
  81
  82   if (mNP_Initialize) {
  83     *error = mNP_Initialize(bFuncs);
  84   } else {
  85     NP_InitializeFunc pfNP_Initialize = (NP_InitializeFunc)
  86       PR_FindFunctionSymbol(mLibrary, "NP_Initialize");
  87     if (!pfNP_Initialize)
  88       return NS_ERROR_FAILURE;
  89     *error = pfNP_Initialize(bFuncs);
  90   }
  91
  92   return NS_OK;
  93 }
  94 #endif
  95
  96 nsresult
  97 PluginPRLibrary::NP_Shutdown(NPError* error)
  98 {
  99   CALLING_CONVENTION_HACK
 100
 101   if (mNP_Shutdown) {
 102     *error = mNP_Shutdown();
 103   } else {
 104     NP_ShutdownFunc pfNP_Shutdown = (NP_ShutdownFunc)
 105       PR_FindFunctionSymbol(mLibrary, "NP_Shutdown");
 106     if (!pfNP_Shutdown)
 107       return NS_ERROR_FAILURE;
 108     *error = pfNP_Shutdown();
 109   }
 110
 111   return NS_OK;
 112 }
 113
 114 nsresult
 115 PluginPRLibrary::NP_GetMIMEDescription(const char** mimeDesc)
 116 {
 117   CALLING_CONVENTION_HACK
 118
 119   if (mNP_GetMIMEDescription) {
 120     *mimeDesc = mNP_GetMIMEDescription();
 121   }
 122   else {
 123     NP_GetMIMEDescriptionFunc pfNP_GetMIMEDescription =
 124       (NP_GetMIMEDescriptionFunc)
 125       PR_FindFunctionSymbol(mLibrary, "NP_GetMIMEDescription");
 126     if (!pfNP_GetMIMEDescription) {
 127       *mimeDesc = "";
 128       return NS_ERROR_FAILURE;
 129     }
 130     *mimeDesc = pfNP_GetMIMEDescription();
 131   }
 132
 133   return NS_OK;
 134 }
 135
 136 nsresult
 137 PluginPRLibrary::NP_GetValue(void *future, NPPVariable aVariable,
 138                              void *aValue, NPError* error)
 139 {
 140   if (mNP_GetValue) {
 141     *error = mNP_GetValue(future, aVariable, aValue);
 142   } else {
 143     NP_GetValueFunc pfNP_GetValue = (NP_GetValueFunc)
 144       PR_FindFunctionSymbol(mLibrary, "NP_GetValue");
 145     if (!pfNP_GetValue)
 146       return NS_ERROR_FAILURE;
 147     *error = pfNP_GetValue(future, aVariable, aValue);
 148   }
 149
 150   return NS_OK;
 151 }
 152
 153 #if defined(XP_WIN) || defined(XP_MACOSX) || defined(XP_OS2)
 154 nsresult
 155 PluginPRLibrary::NP_GetEntryPoints(NPPluginFuncs* pFuncs, NPError* error)
 156 {
 157   CALLING_CONVENTION_HACK
 158
 159   if (mNP_GetEntryPoints) {
 160     *error = mNP_GetEntryPoints(pFuncs);
 161   } else {
 162     NP_GetEntryPointsFunc pfNP_GetEntryPoints = (NP_GetEntryPointsFunc)
 163       PR_FindFunctionSymbol(mLibrary, "NP_GetEntryPoints");
 164     if (!pfNP_GetEntryPoints)
 165       return NS_ERROR_FAILURE;
 166     *error = pfNP_GetEntryPoints(pFuncs);
 167   }
 168
 169   // save NPP_New
 170   mNPP_New = pFuncs->newp;
 171   return NS_OK;
 172 }
 173 #endif
 174
 175 nsresult
 176 PluginPRLibrary::NPP_New(NPMIMEType pluginType, NPP instance,
 177                          uint16_t mode, int16_t argc, char* argn[],
 178                          char* argv[], NPSavedData* saved,
 179                          NPError* error)
 180 {
 181   if (!mNPP_New)
 182     return NS_ERROR_FAILURE;
 183   *error = mNPP_New(pluginType, instance, mode, argc, argn, argv, saved);
 184   return NS_OK;
 185 }
 186
 187 } // namespace mozilla