/[jscoverage]/trunk/js/jsbool.cpp
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Annotation of /trunk/js/jsbool.cpp

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Revision 399 - (hide annotations)
Tue Dec 9 03:37:47 2008 UTC (11 years, 1 month ago) by siliconforks
File size: 5526 byte(s)
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1 siliconforks 332 /* -*- 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 "jsstddef.h"
44     #include "jstypes.h"
45     #include "jsutil.h" /* Added by JSIFY */
46     #include "jsapi.h"
47     #include "jsatom.h"
48     #include "jsbool.h"
49     #include "jscntxt.h"
50     #include "jsversion.h"
51     #include "jsinterp.h"
52     #include "jslock.h"
53     #include "jsnum.h"
54     #include "jsobj.h"
55     #include "jsstr.h"
56    
57     /* Check pseudo-booleans values. */
58     JS_STATIC_ASSERT(JSVAL_VOID == JSVAL_TRUE + JSVAL_ALIGN);
59     JS_STATIC_ASSERT(JSVAL_HOLE == JSVAL_VOID + JSVAL_ALIGN);
60     JS_STATIC_ASSERT(JSVAL_ARETURN == JSVAL_HOLE + JSVAL_ALIGN);
61    
62     JSClass js_BooleanClass = {
63     "Boolean",
64     JSCLASS_HAS_PRIVATE | JSCLASS_HAS_CACHED_PROTO(JSProto_Boolean),
65     JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_PropertyStub,
66     JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, JS_FinalizeStub,
67     JSCLASS_NO_OPTIONAL_MEMBERS
68     };
69    
70     #if JS_HAS_TOSOURCE
71     #include "jsprf.h"
72    
73     static JSBool
74     bool_toSource(JSContext *cx, uintN argc, jsval *vp)
75     {
76     jsval v;
77     char buf[32];
78     JSString *str;
79    
80     if (!js_GetPrimitiveThis(cx, vp, &js_BooleanClass, &v))
81     return JS_FALSE;
82     JS_ASSERT(JSVAL_IS_BOOLEAN(v));
83     JS_snprintf(buf, sizeof buf, "(new %s(%s))",
84     js_BooleanClass.name,
85     JS_BOOLEAN_STR(JSVAL_TO_BOOLEAN(v)));
86     str = JS_NewStringCopyZ(cx, buf);
87     if (!str)
88     return JS_FALSE;
89     *vp = STRING_TO_JSVAL(str);
90     return JS_TRUE;
91     }
92     #endif
93    
94     static JSBool
95     bool_toString(JSContext *cx, uintN argc, jsval *vp)
96     {
97     jsval v;
98     JSAtom *atom;
99     JSString *str;
100    
101     if (!js_GetPrimitiveThis(cx, vp, &js_BooleanClass, &v))
102     return JS_FALSE;
103     JS_ASSERT(JSVAL_IS_BOOLEAN(v));
104     atom = cx->runtime->atomState.booleanAtoms[JSVAL_TO_BOOLEAN(v) ? 1 : 0];
105     str = ATOM_TO_STRING(atom);
106     if (!str)
107     return JS_FALSE;
108     *vp = STRING_TO_JSVAL(str);
109     return JS_TRUE;
110     }
111    
112     static JSBool
113     bool_valueOf(JSContext *cx, uintN argc, jsval *vp)
114     {
115     return js_GetPrimitiveThis(cx, vp, &js_BooleanClass, vp);
116     }
117    
118     static JSFunctionSpec boolean_methods[] = {
119     #if JS_HAS_TOSOURCE
120     JS_FN(js_toSource_str, bool_toSource, 0, JSFUN_THISP_BOOLEAN),
121     #endif
122     JS_FN(js_toString_str, bool_toString, 0, JSFUN_THISP_BOOLEAN),
123     JS_FN(js_valueOf_str, bool_valueOf, 0, JSFUN_THISP_BOOLEAN),
124 siliconforks 399 JS_FN(js_toJSON_str, bool_valueOf, 0, JSFUN_THISP_BOOLEAN),
125 siliconforks 332 JS_FS_END
126     };
127    
128     static JSBool
129     Boolean(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
130     {
131     jsval bval;
132    
133     bval = (argc != 0)
134     ? BOOLEAN_TO_JSVAL(js_ValueToBoolean(argv[0]))
135     : JSVAL_FALSE;
136     if (!(cx->fp->flags & JSFRAME_CONSTRUCTING)) {
137     *rval = bval;
138     return JS_TRUE;
139     }
140     STOBJ_SET_SLOT(obj, JSSLOT_PRIVATE, bval);
141     return JS_TRUE;
142     }
143    
144     JSObject *
145     js_InitBooleanClass(JSContext *cx, JSObject *obj)
146     {
147     JSObject *proto;
148    
149     proto = JS_InitClass(cx, obj, NULL, &js_BooleanClass, Boolean, 1,
150     NULL, boolean_methods, NULL, NULL);
151     if (!proto)
152     return NULL;
153     STOBJ_SET_SLOT(proto, JSSLOT_PRIVATE, JSVAL_FALSE);
154     return proto;
155     }
156    
157     JSString *
158     js_BooleanToString(JSContext *cx, JSBool b)
159     {
160     return ATOM_TO_STRING(cx->runtime->atomState.booleanAtoms[b ? 1 : 0]);
161     }
162    
163     JSBool
164     js_ValueToBoolean(jsval v)
165     {
166     if (JSVAL_IS_NULL(v) || JSVAL_IS_VOID(v))
167     return JS_FALSE;
168     if (JSVAL_IS_OBJECT(v))
169     return JS_TRUE;
170     if (JSVAL_IS_STRING(v))
171     return JSSTRING_LENGTH(JSVAL_TO_STRING(v)) != 0;
172     if (JSVAL_IS_INT(v))
173     return JSVAL_TO_INT(v) != 0;
174     if (JSVAL_IS_DOUBLE(v)) {
175     jsdouble d;
176    
177     d = *JSVAL_TO_DOUBLE(v);
178     return !JSDOUBLE_IS_NaN(d) && d != 0;
179     }
180     JS_ASSERT(JSVAL_IS_BOOLEAN(v));
181     return JSVAL_TO_BOOLEAN(v);
182     }

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