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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* 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/. */
#ifndef vm_JSAtom_h
#define vm_JSAtom_h
#include "mozilla/HashFunctions.h"
#include "mozilla/Maybe.h"
#include "NamespaceImports.h"
#include "gc/MaybeRooted.h"
#include "js/TypeDecls.h"
#include "js/Utility.h"
namespace js {
class AtomSet;
/*
* Return a printable, lossless char[] representation of a string-type atom.
* The returned string is guaranteed to contain only ASCII characters.
*/
extern UniqueChars AtomToPrintableString(JSContext* cx, JSAtom* atom);
class PropertyName;
} /* namespace js */
namespace js {
/*
* Atom tracing and garbage collection hooks.
*/
void TraceAtoms(JSTracer* trc);
extern JSAtom* Atomize(
JSContext* cx, const char* bytes, size_t length,
const mozilla::Maybe<uint32_t>& indexValue = mozilla::Nothing());
extern JSAtom* AtomizeWithoutActiveZone(JSContext* cx, const char* bytes,
size_t length);
template <typename CharT>
extern JSAtom* AtomizeChars(JSContext* cx, const CharT* chars, size_t length);
/*
* Optimized entry points for atomization.
*
* The meaning of suffix:
* * "NonStatic": characters don't match StaticStrings
* * "ValidLength": length fits JSString::MAX_LENGTH
*/
/* Atomize characters when the value of HashString is already known. */
template <typename CharT>
extern JSAtom* AtomizeCharsNonStaticValidLength(JSContext* cx,
mozilla::HashNumber hash,
const CharT* chars,
size_t length);
/**
* Permanently atomize characters.
*
* `chars` shouldn't match any of StaticStrings entry.
* `length` should be validated by JSString::validateLength.
*/
extern JSAtom* PermanentlyAtomizeCharsNonStaticValidLength(
JSContext* cx, AtomSet& atomSet, mozilla::HashNumber hash,
const Latin1Char* chars, size_t length);
/**
* Create an atom whose contents are those of the |utf8ByteLength| code units
* starting at |utf8Chars|, interpreted as UTF-8.
*
* Throws if the code units do not contain valid UTF-8.
*/
extern JSAtom* AtomizeUTF8Chars(JSContext* cx, const char* utf8Chars,
size_t utf8ByteLength);
extern JSAtom* AtomizeString(JSContext* cx, JSString* str);
template <AllowGC allowGC>
extern JSAtom* ToAtom(JSContext* cx,
typename MaybeRooted<JS::Value, allowGC>::HandleType v);
/*
* Pin an atom so that it is never collected. Avoid using this if possible.
*
* This function does not GC.
*/
extern bool PinAtom(JSContext* cx, JSAtom* atom);
#ifdef ENABLE_RECORD_TUPLE
extern bool EnsureAtomized(JSContext* cx, MutableHandleValue v, bool* updated);
#endif
extern JS::Handle<PropertyName*> ClassName(JSProtoKey key, JSContext* cx);
#ifdef DEBUG
bool AtomIsMarked(JS::Zone* zone, JSAtom* atom);
bool AtomIsMarked(JS::Zone* zone, jsid id);
bool AtomIsMarked(JS::Zone* zone, const JS::Value& value);
#endif // DEBUG
} /* namespace js */
#endif /* vm_JSAtom_h */
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