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/* GNU Objective C Runtime ivar related functions.
Copyright (C) 2010 Free Software Foundation, Inc.
Contributed by Nicola Pero
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include "objc-private/common.h"
#include "objc/objc.h"
#include "objc/objc-api.h"
#include "objc-private/runtime.h" /* the kitchen sink */
#include <string.h> /* For strcmp */
struct objc_ivar *
class_getInstanceVariable (Class class_, const char *name)
{
if (class_ != Nil && name != NULL)
{
objc_mutex_lock (__objc_runtime_mutex);
while (class_ != Nil)
{
struct objc_ivar_list *ivars = class_->ivars;
if (ivars != NULL)
{
int i;
for (i = 0; i < ivars->ivar_count; i++)
{
struct objc_ivar *ivar = &(ivars->ivar_list[i]);
if (!strcmp (ivar->ivar_name, name))
{
objc_mutex_unlock (__objc_runtime_mutex);
return ivar;
}
}
}
class_ = class_->super_class;
}
objc_mutex_unlock (__objc_runtime_mutex);
}
return NULL;
}
void *
object_getIndexedIvars (id object)
{
if (object == nil)
return NULL;
else
{
return (void *)(((char *)object)
+ object->class_pointer->instance_size);
}
}
struct objc_ivar *
object_getInstanceVariable (id object, const char *name, void **returnValue)
{
if (object == nil || name == NULL)
return NULL;
else
{
struct objc_ivar * variable = class_getInstanceVariable (object->class_pointer, name);
if (variable != NULL && returnValue != NULL)
{
char *location = (char *)object + variable->ivar_offset;
*returnValue = *((id *)location);
}
return variable;
}
}
struct objc_ivar *
object_setInstanceVariable (id object, const char *name, void *newValue)
{
if (object == nil || name == NULL)
return NULL;
else
{
struct objc_ivar * variable = class_getInstanceVariable (object->class_pointer, name);
if (variable != NULL)
{
char *location = (char *)object + variable->ivar_offset;
*((id *)location) = (id)newValue;
}
return variable;
}
}
id object_getIvar (id object, struct objc_ivar * variable)
{
if (object == nil || variable == NULL)
return nil;
else
{
char *location = (char *)object + variable->ivar_offset;
return *((id *)location);
}
}
void object_setIvar (id object, struct objc_ivar * variable, id value)
{
if (object == nil || variable == NULL)
return;
else
{
char *location = (char *)object + variable->ivar_offset;
*((id *)location) = value;
}
}
const char * ivar_getName (struct objc_ivar * variable)
{
return variable->ivar_name;
}
ptrdiff_t ivar_getOffset (struct objc_ivar * variable)
{
return (ptrdiff_t)(variable->ivar_offset);
}
const char * ivar_getTypeEncoding (struct objc_ivar * variable)
{
return variable->ivar_type;
}
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