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

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Revision 399 - (show annotations)
Tue Dec 9 03:37:47 2008 UTC (10 years, 11 months ago) by siliconforks
File size: 5526 byte(s)
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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 "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 JS_FN(js_toJSON_str, bool_valueOf, 0, JSFUN_THISP_BOOLEAN),
125 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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