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Added missing ivar access functions.

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This commit is contained in:
theraven 2011-04-28 18:39:48 +00:00
parent 12385fcb1e
commit 79b67ad044
2 changed files with 57 additions and 0 deletions
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33
ivar.c
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@ -108,3 +108,36 @@ PRIVATE void objc_compute_ivar_offsets(Class class)
abort();
}
}
////////////////////////////////////////////////////////////////////////////////
// Public API functions
////////////////////////////////////////////////////////////////////////////////
void object_setIvar(id object, Ivar ivar, id value)
{
char *addr = (char*)&object;
addr += ivar_getOffset(ivar);
*(id*)addr = value;
}
Ivar object_setInstanceVariable(id obj, const char *name, void *value)
{
Ivar ivar = class_getInstanceVariable(object_getClass(obj), name);
object_setIvar(obj, ivar, value);
return ivar;
}
id object_getIvar(id object, Ivar ivar)
{
return *(id*)(((char*)&object) + ivar_getOffset(ivar));
}
Ivar object_getInstanceVariable(id obj, const char *name, void **outValue)
{
Ivar ivar = class_getInstanceVariable(object_getClass(obj), name);
if (NULL != outValue)
{
*outValue = object_getIvar(obj, ivar);
}
return ivar;
}

24
objc/runtime.h
View File

@ -266,6 +266,30 @@ size_t class_getInstanceSize(Class cls);
*/
Ivar class_getInstanceVariable(Class cls, const char* name);
/**
* Sets the object value of a specified instance variable.
*/
void object_setIvar(id object, Ivar ivar, id value);
/**
* Sets a named instance variable to the value specified by *value. Note that
* the instance variable must be a pointer-sized quantity.
*/
Ivar object_setInstanceVariable(id obj, const char *name, void *value);
/**
* Returns the value of the named instance variable. This should not be used
* with instance variables that are not pointers.
*/
id object_getIvar(id object, Ivar ivar);
/**
* Returns a named instance variable via the final parameter. Note that
* calling object_getIvar() on the value returned from this function is faster.
*
* Note that the instance variable must be a pointer-sized quantity.
*/
Ivar object_getInstanceVariable(id obj, const char *name, void **outValue);
/**
* Returns a pointer to the function used to handle the specified message. If
* the receiver does not have a method corresponding to this message then this