1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/toolkit/components/ctypes/ctypes.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,152 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "ctypes.h"
1.10 +#include "jsapi.h"
1.11 +#include "mozilla/ModuleUtils.h"
1.12 +#include "nsMemory.h"
1.13 +#include "nsString.h"
1.14 +#include "nsNativeCharsetUtils.h"
1.15 +#include "mozilla/Preferences.h"
1.16 +#include "mozJSComponentLoader.h"
1.17 +#include "nsZipArchive.h"
1.18 +
1.19 +#define JSCTYPES_CONTRACTID \
1.20 + "@mozilla.org/jsctypes;1"
1.21 +
1.22 +
1.23 +#define JSCTYPES_CID \
1.24 +{ 0xc797702, 0x1c60, 0x4051, { 0x9d, 0xd7, 0x4d, 0x74, 0x5, 0x60, 0x56, 0x42 } }
1.25 +
1.26 +namespace mozilla {
1.27 +namespace ctypes {
1.28 +
1.29 +static char*
1.30 +UnicodeToNative(JSContext *cx, const jschar *source, size_t slen)
1.31 +{
1.32 + nsAutoCString native;
1.33 + nsDependentString unicode(reinterpret_cast<const char16_t*>(source), slen);
1.34 + nsresult rv = NS_CopyUnicodeToNative(unicode, native);
1.35 + if (NS_FAILED(rv)) {
1.36 + JS_ReportError(cx, "could not convert string to native charset");
1.37 + return nullptr;
1.38 + }
1.39 +
1.40 + char* result = static_cast<char*>(JS_malloc(cx, native.Length() + 1));
1.41 + if (!result)
1.42 + return nullptr;
1.43 +
1.44 + memcpy(result, native.get(), native.Length() + 1);
1.45 + return result;
1.46 +}
1.47 +
1.48 +static JSCTypesCallbacks sCallbacks = {
1.49 + UnicodeToNative
1.50 +};
1.51 +
1.52 +NS_GENERIC_FACTORY_CONSTRUCTOR(Module)
1.53 +
1.54 +NS_IMPL_ISUPPORTS(Module, nsIXPCScriptable)
1.55 +
1.56 +Module::Module()
1.57 +{
1.58 +}
1.59 +
1.60 +Module::~Module()
1.61 +{
1.62 +}
1.63 +
1.64 +#define XPC_MAP_CLASSNAME Module
1.65 +#define XPC_MAP_QUOTED_CLASSNAME "Module"
1.66 +#define XPC_MAP_WANT_CALL
1.67 +#define XPC_MAP_FLAGS nsIXPCScriptable::WANT_CALL
1.68 +#include "xpc_map_end.h"
1.69 +
1.70 +static bool
1.71 +SealObjectAndPrototype(JSContext* cx, JS::Handle<JSObject *> parent, const char* name)
1.72 +{
1.73 + JS::Rooted<JS::Value> prop(cx);
1.74 + if (!JS_GetProperty(cx, parent, name, &prop))
1.75 + return false;
1.76 +
1.77 + if (prop.isUndefined()) {
1.78 + // Pretend we sealed the object.
1.79 + return true;
1.80 + }
1.81 +
1.82 + JS::Rooted<JSObject*> obj(cx, prop.toObjectOrNull());
1.83 + if (!JS_GetProperty(cx, obj, "prototype", &prop))
1.84 + return false;
1.85 +
1.86 + JS::Rooted<JSObject*> prototype(cx, prop.toObjectOrNull());
1.87 + return JS_FreezeObject(cx, obj) && JS_FreezeObject(cx, prototype);
1.88 +}
1.89 +
1.90 +static bool
1.91 +InitAndSealCTypesClass(JSContext* cx, JS::Handle<JSObject*> global)
1.92 +{
1.93 + // Init the ctypes object.
1.94 + if (!JS_InitCTypesClass(cx, global))
1.95 + return false;
1.96 +
1.97 + // Set callbacks for charset conversion and such.
1.98 + JS::Rooted<JS::Value> ctypes(cx);
1.99 + if (!JS_GetProperty(cx, global, "ctypes", &ctypes))
1.100 + return false;
1.101 +
1.102 + JS_SetCTypesCallbacks(JSVAL_TO_OBJECT(ctypes), &sCallbacks);
1.103 +
1.104 + // Seal up Object, Function, Array and Error and their prototypes. (This
1.105 + // single object instance is shared amongst everyone who imports the ctypes
1.106 + // module.)
1.107 + if (!SealObjectAndPrototype(cx, global, "Object") ||
1.108 + !SealObjectAndPrototype(cx, global, "Function") ||
1.109 + !SealObjectAndPrototype(cx, global, "Array") ||
1.110 + !SealObjectAndPrototype(cx, global, "Error"))
1.111 + return false;
1.112 +
1.113 + // Finally, seal the global object, for good measure. (But not recursively;
1.114 + // this breaks things.)
1.115 + return JS_FreezeObject(cx, global);
1.116 +}
1.117 +
1.118 +NS_IMETHODIMP
1.119 +Module::Call(nsIXPConnectWrappedNative* wrapper,
1.120 + JSContext* cx,
1.121 + JSObject* obj,
1.122 + const JS::CallArgs& args,
1.123 + bool* _retval)
1.124 +{
1.125 + mozJSComponentLoader* loader = mozJSComponentLoader::Get();
1.126 + JS::Rooted<JSObject*> targetObj(cx);
1.127 + nsresult rv = loader->FindTargetObject(cx, &targetObj);
1.128 + NS_ENSURE_SUCCESS(rv, rv);
1.129 +
1.130 + *_retval = InitAndSealCTypesClass(cx, targetObj);
1.131 + return NS_OK;
1.132 +}
1.133 +
1.134 +}
1.135 +}
1.136 +
1.137 +NS_DEFINE_NAMED_CID(JSCTYPES_CID);
1.138 +
1.139 +static const mozilla::Module::CIDEntry kCTypesCIDs[] = {
1.140 + { &kJSCTYPES_CID, false, nullptr, mozilla::ctypes::ModuleConstructor },
1.141 + { nullptr }
1.142 +};
1.143 +
1.144 +static const mozilla::Module::ContractIDEntry kCTypesContracts[] = {
1.145 + { JSCTYPES_CONTRACTID, &kJSCTYPES_CID },
1.146 + { nullptr }
1.147 +};
1.148 +
1.149 +static const mozilla::Module kCTypesModule = {
1.150 + mozilla::Module::kVersion,
1.151 + kCTypesCIDs,
1.152 + kCTypesContracts
1.153 +};
1.154 +
1.155 +NSMODULE_DEFN(jsctypes) = &kCTypesModule;
