LCOV - code coverage report
Current view: directory - js/src - jsbool.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 79 69 87.3 %
Date: 2012-06-02 Functions: 8 8 100.0 %

       1                 : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
       2                 :  *
       3                 :  * ***** BEGIN LICENSE BLOCK *****
       4                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       5                 :  *
       6                 :  * The contents of this file are subject to the Mozilla Public License Version
       7                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       8                 :  * the License. You may obtain a copy of the License at
       9                 :  * http://www.mozilla.org/MPL/
      10                 :  *
      11                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      12                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      13                 :  * for the specific language governing rights and limitations under the
      14                 :  * License.
      15                 :  *
      16                 :  * The Original Code is Mozilla Communicator client code, released
      17                 :  * March 31, 1998.
      18                 :  *
      19                 :  * The Initial Developer of the Original Code is
      20                 :  * Netscape Communications Corporation.
      21                 :  * Portions created by the Initial Developer are Copyright (C) 1998
      22                 :  * the Initial Developer. All Rights Reserved.
      23                 :  *
      24                 :  * Contributor(s):
      25                 :  *
      26                 :  * Alternatively, the contents of this file may be used under the terms of
      27                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      28                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      29                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      30                 :  * of those above. If you wish to allow use of your version of this file only
      31                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      32                 :  * use your version of this file under the terms of the MPL, indicate your
      33                 :  * decision by deleting the provisions above and replace them with the notice
      34                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      35                 :  * the provisions above, a recipient may use your version of this file under
      36                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      37                 :  *
      38                 :  * ***** END LICENSE BLOCK ***** */
      39                 : 
      40                 : /*
      41                 :  * JS boolean implementation.
      42                 :  */
      43                 : #include "jstypes.h"
      44                 : #include "jsutil.h"
      45                 : #include "jsapi.h"
      46                 : #include "jsatom.h"
      47                 : #include "jsbool.h"
      48                 : #include "jscntxt.h"
      49                 : #include "jsinfer.h"
      50                 : #include "jsversion.h"
      51                 : #include "jslock.h"
      52                 : #include "jsnum.h"
      53                 : #include "jsobj.h"
      54                 : #include "jsstr.h"
      55                 : 
      56                 : #include "vm/GlobalObject.h"
      57                 : 
      58                 : #include "jsinferinlines.h"
      59                 : #include "jsobjinlines.h"
      60                 : 
      61                 : #include "vm/BooleanObject-inl.h"
      62                 : #include "vm/MethodGuard-inl.h"
      63                 : #include "vm/StringBuffer-inl.h"
      64                 : 
      65                 : using namespace js;
      66                 : using namespace js::types;
      67                 : 
      68                 : Class js::BooleanClass = {
      69                 :     "Boolean",
      70                 :     JSCLASS_HAS_RESERVED_SLOTS(1) | JSCLASS_HAS_CACHED_PROTO(JSProto_Boolean),    JS_PropertyStub,         /* addProperty */
      71                 :     JS_PropertyStub,         /* delProperty */
      72                 :     JS_PropertyStub,         /* getProperty */
      73                 :     JS_StrictPropertyStub,   /* setProperty */
      74                 :     JS_EnumerateStub,
      75                 :     JS_ResolveStub,
      76                 :     JS_ConvertStub
      77                 : };
      78                 : 
      79                 : #if JS_HAS_TOSOURCE
      80                 : static JSBool
      81             110 : bool_toSource(JSContext *cx, unsigned argc, Value *vp)
      82                 : {
      83             110 :     CallArgs args = CallArgsFromVp(argc, vp);
      84                 : 
      85                 :     bool b, ok;
      86             110 :     if (!BoxedPrimitiveMethodGuard(cx, args, bool_toSource, &b, &ok))
      87              63 :         return ok;
      88                 : 
      89              94 :     StringBuffer sb(cx);
      90              47 :     if (!sb.append("(new Boolean(") || !BooleanToStringBuffer(cx, b, sb) || !sb.append("))"))
      91               0 :         return false;
      92                 : 
      93              47 :     JSString *str = sb.finishString();
      94              47 :     if (!str)
      95               0 :         return false;
      96              47 :     args.rval().setString(str);
      97              47 :     return true;
      98                 : }
      99                 : #endif
     100                 : 
     101                 : static JSBool
     102             111 : bool_toString(JSContext *cx, unsigned argc, Value *vp)
     103                 : {
     104             111 :     CallArgs args = CallArgsFromVp(argc, vp);
     105                 : 
     106                 :     bool b, ok;
     107             111 :     if (!BoxedPrimitiveMethodGuard<bool>(cx, args, bool_toString, &b, &ok))
     108              72 :         return ok;
     109                 : 
     110              39 :     args.rval().setString(cx->runtime->atomState.booleanAtoms[b ? 1 : 0]);
     111              39 :     return true;
     112                 : }
     113                 : 
     114                 : static JSBool
     115             216 : bool_valueOf(JSContext *cx, unsigned argc, Value *vp)
     116                 : {
     117             216 :     CallArgs args = CallArgsFromVp(argc, vp);
     118                 : 
     119                 :     bool b, ok;
     120             216 :     if (!BoxedPrimitiveMethodGuard(cx, args, bool_valueOf, &b, &ok))
     121              63 :         return ok;
     122                 : 
     123             153 :     args.rval().setBoolean(b);
     124             153 :     return true;
     125                 : }
     126                 : 
     127                 : static JSFunctionSpec boolean_methods[] = {
     128                 : #if JS_HAS_TOSOURCE
     129                 :     JS_FN(js_toSource_str,  bool_toSource,  0, 0),
     130                 : #endif
     131                 :     JS_FN(js_toString_str,  bool_toString,  0, 0),
     132                 :     JS_FN(js_valueOf_str,   bool_valueOf,   0, 0),
     133                 :     JS_FS_END
     134                 : };
     135                 : 
     136                 : static JSBool
     137             345 : Boolean(JSContext *cx, unsigned argc, Value *vp)
     138                 : {
     139             345 :     CallArgs args = CallArgsFromVp(argc, vp);
     140                 : 
     141             345 :     bool b = args.length() != 0 ? js_ValueToBoolean(args[0]) : false;
     142                 : 
     143             345 :     if (IsConstructing(vp)) {
     144             288 :         JSObject *obj = BooleanObject::create(cx, b);
     145             288 :         if (!obj)
     146               0 :             return false;
     147             288 :         args.rval().setObject(*obj);
     148                 :     } else {
     149              57 :         args.rval().setBoolean(b);
     150                 :     }
     151             345 :     return true;
     152                 : }
     153                 : 
     154                 : JSObject *
     155            1058 : js_InitBooleanClass(JSContext *cx, JSObject *obj)
     156                 : {
     157            1058 :     JS_ASSERT(obj->isNative());
     158                 : 
     159            1058 :     GlobalObject *global = &obj->asGlobal();
     160                 : 
     161            1058 :     JSObject *booleanProto = global->createBlankPrototype(cx, &BooleanClass);
     162            1058 :     if (!booleanProto)
     163               0 :         return NULL;
     164            1058 :     booleanProto->setFixedSlot(BooleanObject::PRIMITIVE_VALUE_SLOT, BooleanValue(false));
     165                 : 
     166                 :     JSFunction *ctor = global->createConstructor(cx, Boolean, &BooleanClass,
     167            1058 :                                                  CLASS_ATOM(cx, Boolean), 1);
     168            1058 :     if (!ctor)
     169               0 :         return NULL;
     170                 : 
     171            1058 :     if (!LinkConstructorAndPrototype(cx, ctor, booleanProto))
     172               0 :         return NULL;
     173                 : 
     174            1058 :     if (!DefinePropertiesAndBrand(cx, booleanProto, NULL, boolean_methods))
     175               0 :         return NULL;
     176                 : 
     177            1058 :     if (!DefineConstructorAndPrototype(cx, global, JSProto_Boolean, ctor, booleanProto))
     178               0 :         return NULL;
     179                 : 
     180            1058 :     return booleanProto;
     181                 : }
     182                 : 
     183                 : JSString *
     184          121861 : js_BooleanToString(JSContext *cx, JSBool b)
     185                 : {
     186          121861 :     return cx->runtime->atomState.booleanAtoms[b ? 1 : 0];
     187                 : }
     188                 : 
     189                 : namespace js {
     190                 : 
     191                 : bool
     192               9 : BooleanGetPrimitiveValueSlow(JSContext *cx, JSObject &obj, Value *vp)
     193                 : {
     194               9 :     JS_ASSERT(ObjectClassIs(obj, ESClass_Boolean, cx));
     195               9 :     JS_ASSERT(obj.isProxy());
     196                 : 
     197                 :     /*
     198                 :      * To respect the proxy abstraction, we can't simply unwrap and call
     199                 :      * getPrimitiveThis on the wrapped object. All we know is that obj says
     200                 :      * its [[Class]] is "Boolean". Boolean.prototype.valueOf is specified to
     201                 :      * return the [[PrimitiveValue]] internal property, so call that instead.
     202                 :      */
     203              18 :     InvokeArgsGuard ag;
     204               9 :     if (!cx->stack.pushInvokeArgs(cx, 0, &ag))
     205               0 :         return false;
     206               9 :     ag.calleev().setUndefined();
     207               9 :     ag.thisv().setObject(obj);
     208               9 :     if (!GetProxyHandler(&obj)->nativeCall(cx, &obj, &BooleanClass, bool_valueOf, ag))
     209               0 :         return false;
     210               9 :     *vp = ag.rval();
     211               9 :     return true;
     212                 : }
     213                 : 
     214                 : }  /* namespace js */
     215                 : 
     216                 : JSBool
     217        10656554 : js_ValueToBoolean(const Value &v)
     218                 : {
     219        10656554 :     if (v.isInt32())
     220         5050419 :         return v.toInt32() != 0;
     221         5606135 :     if (v.isString())
     222          478847 :         return v.toString()->length() != 0;
     223         5127288 :     if (v.isObject())
     224         1089661 :         return JS_TRUE;
     225         4037627 :     if (v.isNullOrUndefined())
     226         1124234 :         return JS_FALSE;
     227         2913393 :     if (v.isDouble()) {
     228                 :         double d;
     229                 : 
     230          880478 :         d = v.toDouble();
     231          880478 :         return !JSDOUBLE_IS_NaN(d) && d != 0;
     232                 :     }
     233         2032915 :     JS_ASSERT(v.isBoolean());
     234         2032915 :     return v.toBoolean();
     235                 : }

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