gecko-dev/js/src/jsatominlines.h

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
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 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Communicator client code, released
 * March 31, 1998.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
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 *
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 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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#ifndef jsatominlines_h___
#define jsatominlines_h___

#include "jsatom.h"
#include "jsnum.h"

/*
 * Convert v to an atomized string and wrap it as an id.
 */
inline bool
js_ValueToAtom(JSContext *cx, const js::Value &v, JSAtom **atomp)
{
    JSString *str;
    JSAtom *atom;

    /*
     * Optimize for the common case where v is an already-atomized string. The
     * comment in jsstr.h before JSString::flatSetAtomized explains why this is
     * thread-safe. The extra rooting via lastAtom (which would otherwise be
     * done in js_js_AtomizeString) ensures the caller that the resulting id at
     * is least weakly rooted.
     */
    if (v.isString()) {
        str = v.toString();
        if (str->isAtomized()) {
            *atomp = STRING_TO_ATOM(str);
            return true;
        }
    } else {
        str = js_ValueToString(cx, v);
        if (!str)
            return false;
    }
    atom = js_AtomizeString(cx, str, 0);
    if (!atom)
        return false;
    *atomp = atom;
    return true;
}

inline bool
js_ValueToStringId(JSContext *cx, const js::Value &v, jsid *idp)
{
    JSAtom *atom;
    if (js_ValueToAtom(cx, v, &atom)) {
        *idp = ATOM_TO_JSID(atom);
        return true;
    }
    return false;
}

inline bool
js_InternNonIntElementId(JSContext *cx, JSObject *obj, const js::Value &idval,
                         jsid *idp)
{
    JS_ASSERT(!idval.isInt32() || !INT_FITS_IN_JSID(idval.toInt32()));

#if JS_HAS_XML_SUPPORT
    extern bool js_InternNonIntElementIdSlow(JSContext *, JSObject *,
                                             const js::Value &, jsid *);
    if (idval.isObject())
        return js_InternNonIntElementIdSlow(cx, obj, idval, idp);
#endif

    return js_ValueToStringId(cx, idval, idp);
}

inline bool
js_InternNonIntElementId(JSContext *cx, JSObject *obj, const js::Value &idval,
                         jsid *idp, js::Value *vp)
{
    JS_ASSERT(!idval.isInt32() || !INT_FITS_IN_JSID(idval.toInt32()));

#if JS_HAS_XML_SUPPORT
    extern bool js_InternNonIntElementIdSlow(JSContext *, JSObject *,
                                             const js::Value &,
                                             jsid *, js::Value *);
    if (idval.isObject())
        return js_InternNonIntElementIdSlow(cx, obj, idval, idp, vp);
#endif

    JSAtom *atom;
    if (js_ValueToAtom(cx, idval, &atom)) {
        *idp = ATOM_TO_JSID(atom);
        vp->setString(ATOM_TO_STRING(atom));
        return true;
    }
    return false;
}

inline bool
js_Int32ToId(JSContext* cx, int32 index, jsid* id)
{
    if (INT_FITS_IN_JSID(index)) {
        *id = INT_TO_JSID(index);
        return true;
    }

    JSString* str = js_NumberToString(cx, index);
    if (!str)
        return false;

    return js_ValueToStringId(cx, js::StringValue(str), id);
}

#endif /* jsatominlines_h___ */