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6febd292ea
We want to remove flat strings (JSFlatString). With this patch we only expose linear strings (JSLinearString) to API consumers. This is very mechanical for the most part, because code typically only cares about linear strings and not the null-termination aspect. CTypes's Library.cpp has some Windows-specific code where we relied on null-terminated strings. This patch adds JS_CopyStringCharsZ for that use case. Differential Revision: https://phabricator.services.mozilla.com/D48314 --HG-- extra : moz-landing-system : lando
100 lines
3.6 KiB
C++
100 lines
3.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_WebIDLGlobalNameHash_h__
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#define mozilla_dom_WebIDLGlobalNameHash_h__
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#include "js/RootingAPI.h"
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#include "nsTArray.h"
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#include "mozilla/dom/BindingDeclarations.h"
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class JSLinearString;
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namespace mozilla {
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namespace dom {
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namespace constructors {
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namespace id {
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enum ID : uint16_t;
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} // namespace id
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} // namespace constructors
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struct WebIDLNameTableEntry {
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// Check whether a constructor should be enabled for the given object.
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// Note that the object should NOT be an Xray, since Xrays will end up
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// defining constructors on the underlying object.
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typedef bool (*ConstructorEnabled)(JSContext* cx, JS::Handle<JSObject*> obj);
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uint16_t mNameOffset;
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uint16_t mNameLength;
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constructors::id::ID mConstructorId;
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CreateInterfaceObjectsMethod mCreate;
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// May be null if enabled unconditionally
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ConstructorEnabled mEnabled;
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};
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class WebIDLGlobalNameHash {
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public:
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typedef WebIDLNameTableEntry::ConstructorEnabled ConstructorEnabled;
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// Returns false if something failed. aFound is set to true if the name is in
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// the hash, whether it's enabled or not.
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static bool DefineIfEnabled(JSContext* aCx, JS::Handle<JSObject*> aObj,
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JS::Handle<jsid> aId,
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JS::MutableHandle<JS::PropertyDescriptor> aDesc,
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bool* aFound);
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static bool MayResolve(jsid aId);
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// The type of names we're asking for.
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enum NameType {
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// All WebIDL names enabled for aObj.
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AllNames,
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// Only the names that are enabled for aObj and have not been resolved for
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// aObj in the past (and therefore can't have been deleted).
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UnresolvedNamesOnly
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};
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// Returns false if an exception has been thrown on aCx.
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static bool GetNames(JSContext* aCx, JS::Handle<JSObject*> aObj,
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NameType aNameType,
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JS::MutableHandleVector<jsid> aNames);
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// Helpers for resolving & enumerating names on the system global.
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// NOTE: These are distinct as it currently lacks a ProtoAndIfaceCache, and is
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// an XPCOM global.
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static bool ResolveForSystemGlobal(JSContext* aCx, JS::Handle<JSObject*> aObj,
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JS::Handle<jsid> aId, bool* aResolvedp);
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static bool NewEnumerateSystemGlobal(
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JSContext* aCx, JS::Handle<JSObject*> aObj,
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JS::MutableHandleVector<jsid> aProperties, bool aEnumerableOnly);
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private:
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friend struct WebIDLNameTableEntry;
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// Look up an entry by key name. `nullptr` if the entry was not found.
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// The impl of GetEntry is generated by Codegen.py in RegisterBindings.cpp
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static const WebIDLNameTableEntry* GetEntry(JSLinearString* aKey);
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// The total number of names in the hash.
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// The value of sCount is generated by Codegen.py in RegisterBindings.cpp.
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static const uint32_t sCount;
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// The name table entries in the hash.
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// The value of sEntries is generated by Codegen.py in RegisterBindings.cpp.
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static const WebIDLNameTableEntry sEntries[];
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// The names registered in the hash, concatenated as one big string with \0
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// as a separator between names.
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// The value of sNames is generated by Codegen.py in RegisterBindings.cpp.
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static const char sNames[];
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};
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_WebIDLGlobalNameHash_h__
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