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/* Test the Modern GNU Objective-C Runtime API.
This is test 'method', covering all functions starting with 'method'. */
/* { dg-do run } */
/* { dg-skip-if "No API#2 pre-Darwin9" { *-*-darwin[5-8]* } { "-fnext-runtime" } { "" } } */
/* { dg-xfail-run-if "Needs OBJC2 ABI" { *-*-darwin* && { lp64 && { ! objc2 } } } { "-fnext-runtime" } { "" } } */
/* { dg-additional-options "-Wno-objc-root-class" } */
/* To get the modern GNU Objective-C Runtime API, you include
objc/runtime.h. */
#include <objc/runtime.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
@interface MyRootClass
{ Class isa; }
+ alloc;
- init;
+ initialize;
@end
@implementation MyRootClass
+ alloc { return class_createInstance (self, 0); }
- init { return self; }
+ initialize { return self; }
@end
@protocol MyProtocol
- (id) variable;
@end
@protocol MySecondProtocol
- (id) setVariable: (id)value;
@end
@interface MySubClass : MyRootClass <MyProtocol>
{ id variable_ivar; }
- (void) setVariable: (id)value;
- (id) variable;
- (id) constant;
@end
@implementation MySubClass
- (void) setVariable: (id)value { variable_ivar = value; }
- (id) variable { return variable_ivar; }
- (id) constant { return nil; }
@end
int main(int argc, void **args)
{
/* Functions are tested in alphabetical order. */
printf ("Testing method_copyArgumentType () ...\n");
{
Method method = class_getInstanceMethod (objc_getClass ("MySubClass"),
@selector (setVariable:));
char *type = method_copyArgumentType (method, 2);
if (type == NULL || type[0] != '@')
abort ();
}
printf ("Testing method_copyReturnType () ...\n");
{
Method method = class_getClassMethod (objc_getClass ("MyRootClass"),
@selector (alloc));
char *type = method_copyReturnType (method);
/* Check that it returns an object. */
if (type == NULL || type[0] != '@')
abort ();
}
printf ("Testing method_exchangeImplementations () ...\n");
{
Method method_a = class_getInstanceMethod (objc_getClass ("MySubClass"),
@selector (variable));
Method method_b = class_getInstanceMethod (objc_getClass ("MySubClass"),
@selector (constant));
MySubClass *object = [[MySubClass alloc] init];
/* Check that things work as expected before the swap. */
[object setVariable: object];
if ([object variable] != object || [object constant] != nil)
abort ();
/* Swap the methods. */
method_exchangeImplementations (method_a, method_b);
/* Check that behavior has changed. */
if ([object variable] != nil || [object constant] != object)
abort ();
/* Swap the methods again. */
method_exchangeImplementations (method_a, method_b);
/* Check that behavior is back to normal. */
if ([object variable] != object || [object constant] != nil)
abort ();
}
printf ("Testing method_getArgumentType () ...\n");
{
Method method = class_getInstanceMethod (objc_getClass ("MyRootClass"),
@selector (init));
char type[16];
method_getArgumentType (method, 1, type, 16);
/* Check the second argument (_cmd), which should be a SEL. */
if (type[0] != ':')
abort ();
}
printf ("Testing method_getDescription () ...\n");
{
Method method = class_getInstanceMethod (objc_getClass ("MySubClass"),
@selector (variable));
struct objc_method_description *description = method_getDescription (method);
if (strcmp (sel_getName (description->name), "variable") != 0)
abort ();
if (method_getDescription (NULL) != NULL)
abort ();
}
printf ("Testing method_getImplementation () ...\n");
{
typedef void (*set_variable_function) (id receiver, SEL _cmd, id variable);
Method method = class_getInstanceMethod (objc_getClass ("MySubClass"),
@selector (setVariable:));
set_variable_function imp;
MySubClass *object = [[MySubClass alloc] init];
imp = (set_variable_function)(method_getImplementation (method));
(*imp)(object, @selector (setVariable:), object);
if ([object variable] != object)
abort ();
}
printf ("Testing method_getName () ...\n");
{
Method method = class_getInstanceMethod (objc_getClass ("MySubClass"),
@selector (setVariable:));
if (strcmp (sel_getName (method_getName (method)), "setVariable:") != 0)
abort ();
}
printf ("Testing method_getNumberOfArguments () ...\n");
{
Method method = class_getInstanceMethod (objc_getClass ("MySubClass"),
@selector (setVariable:));
if (method_getNumberOfArguments (method) != 3)
abort ();
method = class_getInstanceMethod (objc_getClass ("MySubClass"),
@selector (variable));
if (method_getNumberOfArguments (method) != 2)
abort ();
}
printf ("Testing method_getTypeEncoding () ...\n");
{
Method method = class_getInstanceMethod (objc_getClass ("MySubClass"),
@selector (setVariable:));
const char *types = method_getTypeEncoding (method);
/* Check that method type string starts with 'v' (void) */
if (types == NULL || types[0] != 'v')
abort ();
}
printf ("Testing method_getReturnType () ...\n");
{
Method method = class_getInstanceMethod (objc_getClass ("MySubClass"),
@selector (setVariable:));
char type[16];
method_getReturnType (method, type, 16);
if (type[0] != 'v')
abort ();
method_getReturnType (NULL, type, 16);
if (type[0] != 0)
abort ();
}
printf ("Testing method_setImplementation () ...\n");
{
Method method_a = class_getInstanceMethod (objc_getClass ("MySubClass"),
@selector (variable));
Method method_b = class_getInstanceMethod (objc_getClass ("MySubClass"),
@selector (constant));
IMP original_imp_a = method_getImplementation (method_a);
IMP original_imp_b = method_getImplementation (method_b);
MySubClass *object = [[MySubClass alloc] init];
/* Check that things work as expected before the swap. */
[object setVariable: object];
if ([object variable] != object || [object constant] != nil)
abort ();
/* Have 'variable' use the same implementation as 'constant'. */
if (method_setImplementation (method_a, original_imp_b) != original_imp_a)
abort ();
/* Check that behavior has changed. */
if ([object variable] != nil || [object constant] != nil)
abort ();
/* Put the original method back. */
if (method_setImplementation (method_a, original_imp_a) != original_imp_b)
abort ();
/* Check that behavior is back to normal. */
if ([object variable] != object || [object constant] != nil)
abort ();
}
return 0;
}
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