js/src/jsscriptinlines.h

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
   2  * vim: set ts=8 sw=4 et tw=79 ft=cpp:
   3  *
   4  * ***** BEGIN LICENSE BLOCK *****
   5  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   6  *
   7  * The contents of this file are subject to the Mozilla Public License Version
   8  * 1.1 (the "License"); you may not use this file except in compliance with
   9  * the License. You may obtain a copy of the License at
  10  * http://www.mozilla.org/MPL/
  11  *
  12  * Software distributed under the License is distributed on an "AS IS" basis,
  13  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  14  * for the specific language governing rights and limitations under the
  15  * License.
  16  *
  17  * The Original Code is SpiderMonkey JavaScript engine.
  18  *
  19  * The Initial Developer of the Original Code is
  20  * Mozilla Corporation.
  21  * Portions created by the Initial Developer are Copyright (C) 2009
  22  * the Initial Developer. All Rights Reserved.
  23  *
  24  * Contributor(s):
  25  *   Jason Orendorff <jorendorff@mozilla.com>
  26  *
  27  * Alternatively, the contents of this file may be used under the terms of
  28  * either the GNU General Public License Version 2 or later (the "GPL"), or
  29  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  30  * in which case the provisions of the GPL or the LGPL are applicable instead
  31  * of those above. If you wish to allow use of your version of this file only
  32  * under the terms of either the GPL or the LGPL, and not to allow others to
  33  * use your version of this file under the terms of the MPL, indicate your
  34  * decision by deleting the provisions above and replace them with the notice
  35  * and other provisions required by the GPL or the LGPL. If you do not delete
  36  * the provisions above, a recipient may use your version of this file under
  37  * the terms of any one of the MPL, the GPL or the LGPL.
  38  *
  39  * ***** END LICENSE BLOCK ***** */
  40
  41 #ifndef jsscriptinlines_h___
  42 #define jsscriptinlines_h___
  43
  44 #include "jscntxt.h"
  45 #include "jsfun.h"
  46 #include "jsopcode.h"
  47 #include "jsregexp.h"
  48 #include "jsscript.h"
  49 #include "jsscope.h"
  50
  51 namespace js {
  52
  53 inline
  54 Bindings::Bindings(JSContext *cx)
  55   : lastBinding(cx->compartment->emptyCallShape), nargs(0), nvars(0), nupvars(0)
  56 {
  57 }
  58
  59 inline void
  60 Bindings::transfer(JSContext *cx, Bindings *bindings)
  61 {
  62     JS_ASSERT(lastBinding == cx->compartment->emptyCallShape);
  63
  64     *this = *bindings;
  65 #ifdef DEBUG
  66     bindings->lastBinding = NULL;
  67 #endif
  68
  69     /* Preserve back-pointer invariants across the lastBinding transfer. */
  70     if (lastBinding->inDictionary())
  71         lastBinding->listp = &this->lastBinding;
  72 }
  73
  74 inline void
  75 Bindings::clone(JSContext *cx, Bindings *bindings)
  76 {
  77     JS_ASSERT(lastBinding == cx->compartment->emptyCallShape);
  78
  79     /*
  80      * Non-dictionary bindings are fine to share, as are dictionary bindings if
  81      * they're copy-on-modification.
  82      */
  83     JS_ASSERT(!bindings->lastBinding->inDictionary() || bindings->lastBinding->frozen());
  84
  85     *this = *bindings;
  86 }
  87
  88 const Shape *
  89 Bindings::lastShape() const
  90 {
  91     JS_ASSERT(lastBinding);
  92     JS_ASSERT_IF(lastBinding->inDictionary(), lastBinding->frozen());
  93     return lastBinding;
  94 }
  95
  96 } // namespace js
  97
  98 inline JSFunction *
  99 JSScript::getFunction(size_t index)
 100 {
 101     JSObject *funobj = getObject(index);
 102     JS_ASSERT(funobj->isFunction());
 103     JS_ASSERT(funobj == (JSObject *) funobj->getPrivate());
 104     JSFunction *fun = (JSFunction *) funobj;
 105     JS_ASSERT(FUN_INTERPRETED(fun));
 106     return fun;
 107 }
 108
 109 inline JSObject *
 110 JSScript::getRegExp(size_t index)
 111 {
 112     JSObjectArray *arr = regexps();
 113     JS_ASSERT((uint32) index < arr->length);
 114     JSObject *obj = arr->vector[index];
 115     JS_ASSERT(obj->getClass() == &js_RegExpClass);
 116     return obj;
 117 }
 118
 119 inline bool
 120 JSScript::isEmpty() const
 121 {
 122     if (length > 3)
 123         return false;
 124
 125     jsbytecode *pc = code;
 126     if (noScriptRval && JSOp(*pc) == JSOP_FALSE)
 127         ++pc;
 128     return JSOp(*pc) == JSOP_STOP;
 129 }
 130
 131 #endif /* jsscriptinlines_h___ */