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

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Revision 460 - (hide annotations)
Sat Sep 26 23:15:22 2009 UTC (10 years, 10 months ago) by siliconforks
File size: 5633 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 "jslock.h"
52     #include "jsnum.h"
53     #include "jsobj.h"
54     #include "jsstr.h"
55    
56     /* Check pseudo-booleans values. */
57 siliconforks 460 JS_STATIC_ASSERT(!(JSVAL_TRUE & JSVAL_HOLE_FLAG));
58     JS_STATIC_ASSERT(!(JSVAL_FALSE & JSVAL_HOLE_FLAG));
59     JS_STATIC_ASSERT(!(JSVAL_VOID & JSVAL_HOLE_FLAG));
60     JS_STATIC_ASSERT((JSVAL_HOLE & JSVAL_HOLE_FLAG));
61     JS_STATIC_ASSERT((JSVAL_HOLE & ~JSVAL_HOLE_FLAG) == JSVAL_VOID);
62     JS_STATIC_ASSERT(!(JSVAL_ARETURN & JSVAL_HOLE_FLAG));
63 siliconforks 332
64     JSClass js_BooleanClass = {
65     "Boolean",
66     JSCLASS_HAS_PRIVATE | JSCLASS_HAS_CACHED_PROTO(JSProto_Boolean),
67     JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_PropertyStub,
68     JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, JS_FinalizeStub,
69     JSCLASS_NO_OPTIONAL_MEMBERS
70     };
71    
72     #if JS_HAS_TOSOURCE
73     #include "jsprf.h"
74    
75     static JSBool
76     bool_toSource(JSContext *cx, uintN argc, jsval *vp)
77     {
78     jsval v;
79     char buf[32];
80     JSString *str;
81    
82     if (!js_GetPrimitiveThis(cx, vp, &js_BooleanClass, &v))
83     return JS_FALSE;
84     JS_ASSERT(JSVAL_IS_BOOLEAN(v));
85     JS_snprintf(buf, sizeof buf, "(new %s(%s))",
86     js_BooleanClass.name,
87     JS_BOOLEAN_STR(JSVAL_TO_BOOLEAN(v)));
88     str = JS_NewStringCopyZ(cx, buf);
89     if (!str)
90     return JS_FALSE;
91     *vp = STRING_TO_JSVAL(str);
92     return JS_TRUE;
93     }
94     #endif
95    
96     static JSBool
97     bool_toString(JSContext *cx, uintN argc, jsval *vp)
98     {
99     jsval v;
100     JSAtom *atom;
101     JSString *str;
102    
103     if (!js_GetPrimitiveThis(cx, vp, &js_BooleanClass, &v))
104     return JS_FALSE;
105     JS_ASSERT(JSVAL_IS_BOOLEAN(v));
106     atom = cx->runtime->atomState.booleanAtoms[JSVAL_TO_BOOLEAN(v) ? 1 : 0];
107     str = ATOM_TO_STRING(atom);
108     if (!str)
109     return JS_FALSE;
110     *vp = STRING_TO_JSVAL(str);
111     return JS_TRUE;
112     }
113    
114     static JSBool
115     bool_valueOf(JSContext *cx, uintN argc, jsval *vp)
116     {
117     return js_GetPrimitiveThis(cx, vp, &js_BooleanClass, vp);
118     }
119    
120     static JSFunctionSpec boolean_methods[] = {
121     #if JS_HAS_TOSOURCE
122     JS_FN(js_toSource_str, bool_toSource, 0, JSFUN_THISP_BOOLEAN),
123     #endif
124     JS_FN(js_toString_str, bool_toString, 0, JSFUN_THISP_BOOLEAN),
125     JS_FN(js_valueOf_str, bool_valueOf, 0, JSFUN_THISP_BOOLEAN),
126 siliconforks 399 JS_FN(js_toJSON_str, bool_valueOf, 0, JSFUN_THISP_BOOLEAN),
127 siliconforks 332 JS_FS_END
128     };
129    
130     static JSBool
131     Boolean(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
132     {
133     jsval bval;
134    
135     bval = (argc != 0)
136     ? BOOLEAN_TO_JSVAL(js_ValueToBoolean(argv[0]))
137     : JSVAL_FALSE;
138 siliconforks 460 if (!JS_IsConstructing(cx)) {
139 siliconforks 332 *rval = bval;
140     return JS_TRUE;
141     }
142     STOBJ_SET_SLOT(obj, JSSLOT_PRIVATE, bval);
143     return JS_TRUE;
144     }
145    
146     JSObject *
147     js_InitBooleanClass(JSContext *cx, JSObject *obj)
148     {
149     JSObject *proto;
150    
151     proto = JS_InitClass(cx, obj, NULL, &js_BooleanClass, Boolean, 1,
152     NULL, boolean_methods, NULL, NULL);
153     if (!proto)
154     return NULL;
155     STOBJ_SET_SLOT(proto, JSSLOT_PRIVATE, JSVAL_FALSE);
156     return proto;
157     }
158    
159     JSString *
160     js_BooleanToString(JSContext *cx, JSBool b)
161     {
162     return ATOM_TO_STRING(cx->runtime->atomState.booleanAtoms[b ? 1 : 0]);
163     }
164    
165     JSBool
166     js_ValueToBoolean(jsval v)
167     {
168     if (JSVAL_IS_NULL(v) || JSVAL_IS_VOID(v))
169     return JS_FALSE;
170     if (JSVAL_IS_OBJECT(v))
171     return JS_TRUE;
172     if (JSVAL_IS_STRING(v))
173     return JSSTRING_LENGTH(JSVAL_TO_STRING(v)) != 0;
174     if (JSVAL_IS_INT(v))
175     return JSVAL_TO_INT(v) != 0;
176     if (JSVAL_IS_DOUBLE(v)) {
177     jsdouble d;
178    
179     d = *JSVAL_TO_DOUBLE(v);
180     return !JSDOUBLE_IS_NaN(d) && d != 0;
181     }
182     JS_ASSERT(JSVAL_IS_BOOLEAN(v));
183     return JSVAL_TO_BOOLEAN(v);
184     }

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