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

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Revision 460 - (show annotations)
Sat Sep 26 23:15:22 2009 UTC (10 years, 1 month ago) by siliconforks
File size: 5633 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 "jslock.h"
52 #include "jsnum.h"
53 #include "jsobj.h"
54 #include "jsstr.h"
55
56 /* Check pseudo-booleans values. */
57 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
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 JS_FN(js_toJSON_str, bool_valueOf, 0, JSFUN_THISP_BOOLEAN),
127 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 if (!JS_IsConstructing(cx)) {
139 *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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