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/js/lib/Socket.IO-node/support/expresso/deps/jscoverage/js/jsbool.cpp

http://github.com/onedayitwillmake/RealtimeMultiplayerNodeJs
C++ | 182 lines | 123 code | 17 blank | 42 comment | 20 complexity | 4e0d2a7b89debc911876c3fa7f6c5eb0 MD5 | raw file
  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. */
 58JS_STATIC_ASSERT(JSVAL_VOID == JSVAL_TRUE + JSVAL_ALIGN);
 59JS_STATIC_ASSERT(JSVAL_HOLE == JSVAL_VOID + JSVAL_ALIGN);
 60JS_STATIC_ASSERT(JSVAL_ARETURN == JSVAL_HOLE + JSVAL_ALIGN);
 61
 62JSClass 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
 73static JSBool
 74bool_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
 94static JSBool
 95bool_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
112static JSBool
113bool_valueOf(JSContext *cx, uintN argc, jsval *vp)
114{
115    return js_GetPrimitiveThis(cx, vp, &js_BooleanClass, vp);
116}
117
118static 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
128static JSBool
129Boolean(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
144JSObject *
145js_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
157JSString *
158js_BooleanToString(JSContext *cx, JSBool b)
159{
160    return ATOM_TO_STRING(cx->runtime->atomState.booleanAtoms[b ? 1 : 0]);
161}
162
163JSBool
164js_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}