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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "ctypes.h"
#include "jsapi.h"
#include "mozilla/ModuleUtils.h"
#include "nsMemory.h"
#include "nsString.h"
#include "nsNativeCharsetUtils.h"
#include "mozilla/Preferences.h"
#include "mozJSComponentLoader.h"
#include "nsZipArchive.h"
#include "xpc_make_class.h"
#define JSCTYPES_CONTRACTID \
"@mozilla.org/jsctypes;1"
#define JSCTYPES_CID \
{ 0xc797702, 0x1c60, 0x4051, { 0x9d, 0xd7, 0x4d, 0x74, 0x5, 0x60, 0x56, 0x42 } }
namespace mozilla {
namespace ctypes {
static char*
UnicodeToNative(JSContext *cx, const char16_t *source, size_t slen)
{
nsAutoCString native;
nsDependentString unicode(reinterpret_cast<const char16_t*>(source), slen);
nsresult rv = NS_CopyUnicodeToNative(unicode, native);
if (NS_FAILED(rv)) {
JS_ReportErrorASCII(cx, "could not convert string to native charset");
return nullptr;
}
char* result = static_cast<char*>(JS_malloc(cx, native.Length() + 1));
if (!result)
return nullptr;
memcpy(result, native.get(), native.Length() + 1);
return result;
}
static JSCTypesCallbacks sCallbacks = {
UnicodeToNative
};
NS_GENERIC_FACTORY_CONSTRUCTOR(Module)
NS_IMPL_ISUPPORTS(Module, nsIXPCScriptable)
Module::Module()
{
}
Module::~Module()
{
}
#define XPC_MAP_CLASSNAME Module
#define XPC_MAP_QUOTED_CLASSNAME "Module"
#define XPC_MAP_WANT_CALL
#define XPC_MAP_FLAGS nsIXPCScriptable::WANT_CALL
#include "xpc_map_end.h"
static bool
SealObjectAndPrototype(JSContext* cx, JS::Handle<JSObject *> parent, const char* name)
{
JS::Rooted<JS::Value> prop(cx);
if (!JS_GetProperty(cx, parent, name, &prop))
return false;
if (prop.isUndefined()) {
// Pretend we sealed the object.
return true;
}
JS::Rooted<JSObject*> obj(cx, prop.toObjectOrNull());
if (!JS_GetProperty(cx, obj, "prototype", &prop))
return false;
JS::Rooted<JSObject*> prototype(cx, prop.toObjectOrNull());
return JS_FreezeObject(cx, obj) && JS_FreezeObject(cx, prototype);
}
static bool
InitAndSealCTypesClass(JSContext* cx, JS::Handle<JSObject*> global)
{
// Init the ctypes object.
if (!JS_InitCTypesClass(cx, global))
return false;
// Set callbacks for charset conversion and such.
JS::Rooted<JS::Value> ctypes(cx);
if (!JS_GetProperty(cx, global, "ctypes", &ctypes))
return false;
JS_SetCTypesCallbacks(ctypes.toObjectOrNull(), &sCallbacks);
// Seal up Object, Function, Array and Error and their prototypes. (This
// single object instance is shared amongst everyone who imports the ctypes
// module.)
if (!SealObjectAndPrototype(cx, global, "Object") ||
!SealObjectAndPrototype(cx, global, "Function") ||
!SealObjectAndPrototype(cx, global, "Array") ||
!SealObjectAndPrototype(cx, global, "Error"))
return false;
return true;
}
NS_IMETHODIMP
Module::Call(nsIXPConnectWrappedNative* wrapper,
JSContext* cx,
JSObject* obj,
const JS::CallArgs& args,
bool* _retval)
{
mozJSComponentLoader* loader = mozJSComponentLoader::Get();
JS::Rooted<JSObject*> targetObj(cx);
nsresult rv = loader->FindTargetObject(cx, &targetObj);
NS_ENSURE_SUCCESS(rv, rv);
*_retval = InitAndSealCTypesClass(cx, targetObj);
return NS_OK;
}
} // namespace ctypes
} // namespace mozilla
NS_DEFINE_NAMED_CID(JSCTYPES_CID);
static const mozilla::Module::CIDEntry kCTypesCIDs[] = {
{ &kJSCTYPES_CID, false, nullptr, mozilla::ctypes::ModuleConstructor },
{ nullptr }
};
static const mozilla::Module::ContractIDEntry kCTypesContracts[] = {
{ JSCTYPES_CONTRACTID, &kJSCTYPES_CID },
{ nullptr }
};
static const mozilla::Module kCTypesModule = {
mozilla::Module::kVersion,
kCTypesCIDs,
kCTypesContracts
};
NSMODULE_DEFN(jsctypes) = &kCTypesModule;
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