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gecko/js/jsd/jsd_val.c

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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
* JavaScript Debugging support - Value and Property support
*/
#include "jsd.h"
#include "jsapi.h"
#include "jspubtd.h"
/*
* Lifted with slight modification from jsobj.h
*/
#define OBJ_TO_OUTER_OBJECT(cx, obj) \
do { \
JSClass *clasp_ = JS_GetClass(cx, obj); \
if (clasp_->flags & JSCLASS_IS_EXTENDED) { \
JSExtendedClass *xclasp_ = (JSExtendedClass*) clasp_; \
if (xclasp_->outerObject) \
obj = xclasp_->outerObject(cx, obj); \
} \
} while(0)
#ifdef DEBUG
void JSD_ASSERT_VALID_VALUE(JSDValue* jsdval)
{
JS_ASSERT(jsdval);
JS_ASSERT(jsdval->nref > 0);
if(!JS_CLIST_IS_EMPTY(&jsdval->props))
{
JS_ASSERT(CHECK_BIT_FLAG(jsdval->flags, GOT_PROPS));
JS_ASSERT(JSVAL_IS_OBJECT(jsdval->val));
}
if(jsdval->proto)
{
JS_ASSERT(CHECK_BIT_FLAG(jsdval->flags, GOT_PROTO));
JS_ASSERT(jsdval->proto->nref > 0);
}
if(jsdval->parent)
{
JS_ASSERT(CHECK_BIT_FLAG(jsdval->flags, GOT_PARENT));
JS_ASSERT(jsdval->parent->nref > 0);
}
if(jsdval->ctor)
{
JS_ASSERT(CHECK_BIT_FLAG(jsdval->flags, GOT_CTOR));
JS_ASSERT(jsdval->ctor->nref > 0);
}
}
void JSD_ASSERT_VALID_PROPERTY(JSDProperty* jsdprop)
{
JS_ASSERT(jsdprop);
JS_ASSERT(jsdprop->name);
JS_ASSERT(jsdprop->name->nref > 0);
JS_ASSERT(jsdprop->val);
JS_ASSERT(jsdprop->val->nref > 0);
if(jsdprop->alias)
JS_ASSERT(jsdprop->alias->nref > 0);
}
#endif
JSBool
jsd_IsValueObject(JSDContext* jsdc, JSDValue* jsdval)
{
return JSVAL_IS_OBJECT(jsdval->val);
}
JSBool
jsd_IsValueNumber(JSDContext* jsdc, JSDValue* jsdval)
{
return JSVAL_IS_NUMBER(jsdval->val);
}
JSBool
jsd_IsValueInt(JSDContext* jsdc, JSDValue* jsdval)
{
return JSVAL_IS_INT(jsdval->val);
}
JSBool
jsd_IsValueDouble(JSDContext* jsdc, JSDValue* jsdval)
{
return JSVAL_IS_DOUBLE(jsdval->val);
}
JSBool
jsd_IsValueString(JSDContext* jsdc, JSDValue* jsdval)
{
return JSVAL_IS_STRING(jsdval->val);
}
JSBool
jsd_IsValueBoolean(JSDContext* jsdc, JSDValue* jsdval)
{
return JSVAL_IS_BOOLEAN(jsdval->val);
}
JSBool
jsd_IsValueNull(JSDContext* jsdc, JSDValue* jsdval)
{
return JSVAL_IS_NULL(jsdval->val);
}
JSBool
jsd_IsValueVoid(JSDContext* jsdc, JSDValue* jsdval)
{
return JSVAL_IS_VOID(jsdval->val);
}
JSBool
jsd_IsValuePrimitive(JSDContext* jsdc, JSDValue* jsdval)
{
return JSVAL_IS_PRIMITIVE(jsdval->val);
}
JSBool
jsd_IsValueFunction(JSDContext* jsdc, JSDValue* jsdval)
{
return !JSVAL_IS_PRIMITIVE(jsdval->val) &&
JS_ObjectIsFunction(jsdc->dumbContext, JSVAL_TO_OBJECT(jsdval->val));
}
JSBool
jsd_IsValueNative(JSDContext* jsdc, JSDValue* jsdval)
{
JSContext* cx = jsdc->dumbContext;
jsval val = jsdval->val;
JSFunction* fun;
JSExceptionState* exceptionState;
if(jsd_IsValueFunction(jsdc, jsdval))
{
JSBool ok = JS_FALSE;
JS_BeginRequest(cx);
exceptionState = JS_SaveExceptionState(cx);
fun = JS_ValueToFunction(cx, val);
JS_RestoreExceptionState(cx, exceptionState);
if(fun)
ok = JS_GetFunctionScript(cx, fun) ? JS_FALSE : JS_TRUE;
JS_EndRequest(cx);
JS_ASSERT(fun);
return ok;
}
return !JSVAL_IS_PRIMITIVE(val);
}
/***************************************************************************/
JSBool
jsd_GetValueBoolean(JSDContext* jsdc, JSDValue* jsdval)
{
jsval val = jsdval->val;
if(!JSVAL_IS_BOOLEAN(val))
return JS_FALSE;
return JSVAL_TO_BOOLEAN(val);
}
int32
jsd_GetValueInt(JSDContext* jsdc, JSDValue* jsdval)
{
jsval val = jsdval->val;
if(!JSVAL_IS_INT(val))
return 0;
return JSVAL_TO_INT(val);
}
jsdouble*
jsd_GetValueDouble(JSDContext* jsdc, JSDValue* jsdval)
{
jsval val = jsdval->val;
if(!JSVAL_IS_DOUBLE(val))
return 0;
return JSVAL_TO_DOUBLE(val);
}
JSString*
jsd_GetValueString(JSDContext* jsdc, JSDValue* jsdval)
{
JSContext* cx = jsdc->dumbContext;
JSExceptionState* exceptionState;
if(!jsdval->string)
{
/* if the jsval is a string, then we don't need to double root it */
if(JSVAL_IS_STRING(jsdval->val))
jsdval->string = JSVAL_TO_STRING(jsdval->val);
else
{
JS_BeginRequest(cx);
exceptionState = JS_SaveExceptionState(cx);
jsdval->string = JS_ValueToString(cx, jsdval->val);
JS_RestoreExceptionState(cx, exceptionState);
if(jsdval->string)
{
if(!JS_AddNamedRoot(cx, &jsdval->string, "ValueString"))
jsdval->string = NULL;
}
JS_EndRequest(cx);
}
}
return jsdval->string;
}
const char*
jsd_GetValueFunctionName(JSDContext* jsdc, JSDValue* jsdval)
{
JSContext* cx = jsdc->dumbContext;
JSFunction* fun;
JSExceptionState* exceptionState;
if(!jsdval->funName && jsd_IsValueFunction(jsdc, jsdval))
{
JS_BeginRequest(cx);
exceptionState = JS_SaveExceptionState(cx);
fun = JS_ValueToFunction(cx, jsdval->val);
JS_RestoreExceptionState(cx, exceptionState);
JS_EndRequest(cx);
if(!fun)
return NULL;
jsdval->funName = JS_GetFunctionName(fun);
}
return jsdval->funName;
}
/***************************************************************************/
JSDValue*
jsd_NewValue(JSDContext* jsdc, jsval val)
{
JSDValue* jsdval;
if(!(jsdval = (JSDValue*) calloc(1, sizeof(JSDValue))))
return NULL;
if(JSVAL_IS_GCTHING(val))
{
JSBool ok = JS_FALSE;
JS_BeginRequest(jsdc->dumbContext);
ok = JS_AddNamedRoot(jsdc->dumbContext, &jsdval->val, "JSDValue");
JS_EndRequest(jsdc->dumbContext);
if(!ok)
{
free(jsdval);
return NULL;
}
}
jsdval->val = val;
jsdval->nref = 1;
JS_INIT_CLIST(&jsdval->props);
return jsdval;
}
void
jsd_DropValue(JSDContext* jsdc, JSDValue* jsdval)
{
JS_ASSERT(jsdval->nref > 0);
if(0 == --jsdval->nref)
{
jsd_RefreshValue(jsdc, jsdval);
if(JSVAL_IS_GCTHING(jsdval->val))
{
JS_BeginRequest(jsdc->dumbContext);
JS_RemoveRoot(jsdc->dumbContext, &jsdval->val);
JS_EndRequest(jsdc->dumbContext);
}
free(jsdval);
}
}
jsval
jsd_GetValueWrappedJSVal(JSDContext* jsdc, JSDValue* jsdval)
{
JSObject* obj;
JSContext* cx;
jsval val = jsdval->val;
if (!JSVAL_IS_PRIMITIVE(val)) {
cx = JSD_GetDefaultJSContext(jsdc);
obj = JSVAL_TO_OBJECT(val);
OBJ_TO_OUTER_OBJECT(cx, obj);
if (!obj)
{
JS_ClearPendingException(cx);
val = JSVAL_NULL;
}
else
val = OBJECT_TO_JSVAL(obj);
}
return val;
}
static JSDProperty* _newProperty(JSDContext* jsdc, JSPropertyDesc* pd,
uintN additionalFlags)
{
JSDProperty* jsdprop;
if(!(jsdprop = (JSDProperty*) calloc(1, sizeof(JSDProperty))))
return NULL;
JS_INIT_CLIST(&jsdprop->links);
jsdprop->nref = 1;
jsdprop->flags = pd->flags | additionalFlags;
jsdprop->slot = pd->slot;
if(!(jsdprop->name = jsd_NewValue(jsdc, pd->id)))
goto new_prop_fail;
if(!(jsdprop->val = jsd_NewValue(jsdc, pd->value)))
goto new_prop_fail;
if((jsdprop->flags & JSDPD_ALIAS) &&
!(jsdprop->alias = jsd_NewValue(jsdc, pd->alias)))
goto new_prop_fail;
return jsdprop;
new_prop_fail:
jsd_DropProperty(jsdc, jsdprop);
return NULL;
}
static void _freeProps(JSDContext* jsdc, JSDValue* jsdval)
{
JSDProperty* jsdprop;
while(jsdprop = (JSDProperty*)jsdval->props.next,
jsdprop != (JSDProperty*)&jsdval->props)
{
JS_REMOVE_AND_INIT_LINK(&jsdprop->links);
jsd_DropProperty(jsdc, jsdprop);
}
JS_ASSERT(JS_CLIST_IS_EMPTY(&jsdval->props));
CLEAR_BIT_FLAG(jsdval->flags, GOT_PROPS);
}
static JSBool _buildProps(JSDContext* jsdc, JSDValue* jsdval)
{
JSContext* cx = jsdc->dumbContext;
JSPropertyDescArray pda;
uintN i;
JS_ASSERT(JS_CLIST_IS_EMPTY(&jsdval->props));
JS_ASSERT(!(CHECK_BIT_FLAG(jsdval->flags, GOT_PROPS)));
JS_ASSERT(JSVAL_IS_OBJECT(jsdval->val));
if(!JSVAL_IS_OBJECT(jsdval->val) || JSVAL_IS_NULL(jsdval->val))
return JS_FALSE;
JS_BeginRequest(cx);
if(!JS_GetPropertyDescArray(cx, JSVAL_TO_OBJECT(jsdval->val), &pda))
{
JS_EndRequest(cx);
return JS_FALSE;
}
for(i = 0; i < pda.length; i++)
{
JSDProperty* prop = _newProperty(jsdc, &pda.array[i], 0);
if(!prop)
{
_freeProps(jsdc, jsdval);
break;
}
JS_APPEND_LINK(&prop->links, &jsdval->props);
}
JS_PutPropertyDescArray(cx, &pda);
JS_EndRequest(cx);
SET_BIT_FLAG(jsdval->flags, GOT_PROPS);
return !JS_CLIST_IS_EMPTY(&jsdval->props);
}
#undef DROP_CLEAR_VALUE
#define DROP_CLEAR_VALUE(jsdc, x) if(x){jsd_DropValue(jsdc,x); x = NULL;}
void
jsd_RefreshValue(JSDContext* jsdc, JSDValue* jsdval)
{
JSContext* cx = jsdc->dumbContext;
if(jsdval->string)
{
/* if the jsval is a string, then we didn't need to root the string */
if(!JSVAL_IS_STRING(jsdval->val))
{
JS_BeginRequest(cx);
JS_RemoveRoot(cx, &jsdval->string);
JS_EndRequest(cx);
}
jsdval->string = NULL;
}
jsdval->funName = NULL;
jsdval->className = NULL;
DROP_CLEAR_VALUE(jsdc, jsdval->proto);
DROP_CLEAR_VALUE(jsdc, jsdval->parent);
DROP_CLEAR_VALUE(jsdc, jsdval->ctor);
_freeProps(jsdc, jsdval);
jsdval->flags = 0;
}
/***************************************************************************/
uintN
jsd_GetCountOfProperties(JSDContext* jsdc, JSDValue* jsdval)
{
JSDProperty* jsdprop;
uintN count = 0;
if(!(CHECK_BIT_FLAG(jsdval->flags, GOT_PROPS)))
if(!_buildProps(jsdc, jsdval))
return 0;
for(jsdprop = (JSDProperty*)jsdval->props.next;
jsdprop != (JSDProperty*)&jsdval->props;
jsdprop = (JSDProperty*)jsdprop->links.next)
{
count++;
}
return count;
}
JSDProperty*
jsd_IterateProperties(JSDContext* jsdc, JSDValue* jsdval, JSDProperty **iterp)
{
JSDProperty* jsdprop = *iterp;
if(!(CHECK_BIT_FLAG(jsdval->flags, GOT_PROPS)))
{
JS_ASSERT(!jsdprop);
if(!_buildProps(jsdc, jsdval))
return NULL;
}
if(!jsdprop)
jsdprop = (JSDProperty*)jsdval->props.next;
if(jsdprop == (JSDProperty*)&jsdval->props)
return NULL;
*iterp = (JSDProperty*)jsdprop->links.next;
JS_ASSERT(jsdprop);
jsdprop->nref++;
return jsdprop;
}
JSDProperty*
jsd_GetValueProperty(JSDContext* jsdc, JSDValue* jsdval, JSString* name)
{
JSContext* cx = jsdc->dumbContext;
JSDProperty* jsdprop;
JSDProperty* iter = NULL;
JSObject* obj;
uintN attrs = 0;
JSBool found;
JSPropertyDesc pd;
const jschar * nameChars;
size_t nameLen;
jsval val;
if(!jsd_IsValueObject(jsdc, jsdval))
return NULL;
/* If we already have the prop, then return it */
while(NULL != (jsdprop = jsd_IterateProperties(jsdc, jsdval, &iter)))
{
JSString* propName = jsd_GetValueString(jsdc, jsdprop->name);
if(propName && !JS_CompareStrings(propName, name))
return jsdprop;
JSD_DropProperty(jsdc, jsdprop);
}
/* Not found in property list, look it up explicitly */
if(!(obj = JSVAL_TO_OBJECT(jsdval->val)))
return NULL;
nameChars = JS_GetStringChars(name);
nameLen = JS_GetStringLength(name);
JS_BeginRequest(cx);
JS_GetUCPropertyAttributes(cx, obj, nameChars, nameLen, &attrs, &found);
if (!found)
{
JS_EndRequest(cx);
return NULL;
}
JS_ClearPendingException(cx);
if(!JS_GetUCProperty(cx, obj, nameChars, nameLen, &val))
{
if (JS_IsExceptionPending(cx))
{
if (!JS_GetPendingException(cx, &pd.value))
{
JS_EndRequest(cx);
return NULL;
}
pd.flags = JSPD_EXCEPTION;
}
else
{
pd.flags = JSPD_ERROR;
pd.value = JSVAL_VOID;
}
}
else
{
pd.value = val;
}
JS_EndRequest(cx);
pd.id = STRING_TO_JSVAL(name);
pd.alias = pd.slot = pd.spare = 0;
pd.flags |= (attrs & JSPROP_ENUMERATE) ? JSPD_ENUMERATE : 0
| (attrs & JSPROP_READONLY) ? JSPD_READONLY : 0
| (attrs & JSPROP_PERMANENT) ? JSPD_PERMANENT : 0;
return _newProperty(jsdc, &pd, JSDPD_HINTED);
}
JSDValue*
jsd_GetValuePrototype(JSDContext* jsdc, JSDValue* jsdval)
{
if(!(CHECK_BIT_FLAG(jsdval->flags, GOT_PROTO)))
{
JSObject* obj;
JSObject* proto;
JS_ASSERT(!jsdval->proto);
SET_BIT_FLAG(jsdval->flags, GOT_PROTO);
if(!JSVAL_IS_OBJECT(jsdval->val))
return NULL;
if(!(obj = JSVAL_TO_OBJECT(jsdval->val)))
return NULL;
JS_BeginRequest(jsdc->dumbContext);
proto = JS_GetPrototype(jsdc->dumbContext, obj);
JS_EndRequest(jsdc->dumbContext);
if(!proto)
return NULL;
jsdval->proto = jsd_NewValue(jsdc, OBJECT_TO_JSVAL(proto));
}
if(jsdval->proto)
jsdval->proto->nref++;
return jsdval->proto;
}
JSDValue*
jsd_GetValueParent(JSDContext* jsdc, JSDValue* jsdval)
{
if(!(CHECK_BIT_FLAG(jsdval->flags, GOT_PARENT)))
{
JSObject* obj;
JSObject* parent;
JS_ASSERT(!jsdval->parent);
SET_BIT_FLAG(jsdval->flags, GOT_PARENT);
if(!JSVAL_IS_OBJECT(jsdval->val))
return NULL;
if(!(obj = JSVAL_TO_OBJECT(jsdval->val)))
return NULL;
JS_BeginRequest(jsdc->dumbContext);
parent = JS_GetParent(jsdc->dumbContext,obj);
JS_EndRequest(jsdc->dumbContext);
if(!parent)
return NULL;
jsdval->parent = jsd_NewValue(jsdc, OBJECT_TO_JSVAL(parent));
}
if(jsdval->parent)
jsdval->parent->nref++;
return jsdval->parent;
}
JSDValue*
jsd_GetValueConstructor(JSDContext* jsdc, JSDValue* jsdval)
{
if(!(CHECK_BIT_FLAG(jsdval->flags, GOT_CTOR)))
{
JSObject* obj;
JSObject* proto;
JSObject* ctor;
JS_ASSERT(!jsdval->ctor);
SET_BIT_FLAG(jsdval->flags, GOT_CTOR);
if(!JSVAL_IS_OBJECT(jsdval->val))
return NULL;
if(!(obj = JSVAL_TO_OBJECT(jsdval->val)))
return NULL;
JS_BeginRequest(jsdc->dumbContext);
proto = JS_GetPrototype(jsdc->dumbContext,obj);
if(!proto)
{
JS_EndRequest(jsdc->dumbContext);
return NULL;
}
ctor = JS_GetConstructor(jsdc->dumbContext,proto);
JS_EndRequest(jsdc->dumbContext);
if(!ctor)
return NULL;
jsdval->ctor = jsd_NewValue(jsdc, OBJECT_TO_JSVAL(ctor));
}
if(jsdval->ctor)
jsdval->ctor->nref++;
return jsdval->ctor;
}
const char*
jsd_GetValueClassName(JSDContext* jsdc, JSDValue* jsdval)
{
jsval val = jsdval->val;
if(!jsdval->className && JSVAL_IS_OBJECT(val))
{
JSObject* obj;
if(!(obj = JSVAL_TO_OBJECT(val)))
return NULL;
JS_BeginRequest(jsdc->dumbContext);
if(JS_GET_CLASS(jsdc->dumbContext, obj))
jsdval->className = JS_GET_CLASS(jsdc->dumbContext, obj)->name;
JS_EndRequest(jsdc->dumbContext);
}
return jsdval->className;
}
/***************************************************************************/
/***************************************************************************/
JSDValue*
jsd_GetPropertyName(JSDContext* jsdc, JSDProperty* jsdprop)
{
jsdprop->name->nref++;
return jsdprop->name;
}
JSDValue*
jsd_GetPropertyValue(JSDContext* jsdc, JSDProperty* jsdprop)
{
jsdprop->val->nref++;
return jsdprop->val;
}
JSDValue*
jsd_GetPropertyAlias(JSDContext* jsdc, JSDProperty* jsdprop)
{
if(jsdprop->alias)
jsdprop->alias->nref++;
return jsdprop->alias;
}
uintN
jsd_GetPropertyFlags(JSDContext* jsdc, JSDProperty* jsdprop)
{
return jsdprop->flags;
}
uintN
jsd_GetPropertyVarArgSlot(JSDContext* jsdc, JSDProperty* jsdprop)
{
return jsdprop->slot;
}
void
jsd_DropProperty(JSDContext* jsdc, JSDProperty* jsdprop)
{
JS_ASSERT(jsdprop->nref > 0);
if(0 == --jsdprop->nref)
{
JS_ASSERT(JS_CLIST_IS_EMPTY(&jsdprop->links));
DROP_CLEAR_VALUE(jsdc, jsdprop->val);
DROP_CLEAR_VALUE(jsdc, jsdprop->name);
DROP_CLEAR_VALUE(jsdc, jsdprop->alias);
free(jsdprop);
}
}
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