test/ivar.m

   1 // TEST_CONFIG
   2
   3 #include "test.h"
   4 #include "testroot.i"
   5 #include <stdint.h>
   6 #include <string.h>
   7 #include <objc/objc-runtime.h>
   8
   9 @interface Super : TestRoot {
  10   @public
  11     char superIvar;
  12 }
  13 @end
  14
  15 @interface Sub : Super {
  16   @public
  17     id subIvar;
  18 }
  19 @end
  20
  21 @implementation Super @end
  22 @implementation Sub @end
  23
  24
  25 int main()
  26 {
  27     /*
  28        Runtime layout of Sub:
  29          [0] isa
  30          [1] superIvar
  31          [2] subIvar
  32     */
  33
  34     Ivar ivar;
  35     Sub *sub = [Sub new];
  36     sub->subIvar = [Sub class];
  37     testassert(((Class *)objc_unretainedPointer(sub))[2] == [Sub class]);
  38
  39     ivar = class_getInstanceVariable([Sub class], "subIvar");
  40     testassert(ivar);
  41     testassert(2*sizeof(intptr_t) == (size_t)ivar_getOffset(ivar));
  42     testassert(0 == strcmp(ivar_getName(ivar), "subIvar"));
  43     testassert(0 == strcmp(ivar_getTypeEncoding(ivar), "@"));
  44
  45     ivar = class_getInstanceVariable([Super class], "superIvar");
  46     testassert(ivar);
  47     testassert(sizeof(intptr_t) == (size_t)ivar_getOffset(ivar));
  48     testassert(0 == strcmp(ivar_getName(ivar), "superIvar"));
  49     testassert(0 == strcmp(ivar_getTypeEncoding(ivar), "c"));
  50     testassert(ivar == class_getInstanceVariable([Sub class], "superIvar"));
  51
  52     ivar = class_getInstanceVariable([Super class], "subIvar");
  53     testassert(!ivar);
  54
  55     ivar = class_getInstanceVariable(object_getClass([Sub class]), "subIvar");
  56     testassert(!ivar);
  57
  58     ivar = class_getInstanceVariable([Sub class], "subIvar");
  59     object_setIvar(sub, ivar, sub);
  60     testassert(sub->subIvar == sub);
  61     testassert(sub == object_getIvar(sub, ivar));
  62
  63     testassert(NULL == class_getInstanceVariable(NULL, "foo"));
  64     testassert(NULL == class_getInstanceVariable([Sub class], NULL));
  65     testassert(NULL == class_getInstanceVariable(NULL, NULL));
  66
  67     testassert(NULL == object_getIvar(sub, NULL));
  68     testassert(NULL == object_getIvar(NULL, ivar));
  69     testassert(NULL == object_getIvar(NULL, NULL));
  70
  71     object_setIvar(sub, NULL, NULL);
  72     object_setIvar(NULL, ivar, NULL);
  73     object_setIvar(NULL, NULL, NULL);
  74
  75 #if !__has_feature(objc_arc)
  76
  77     uintptr_t value;
  78
  79     sub->subIvar = (id)10;
  80     value = 0;
  81     object_getInstanceVariable(sub, "subIvar", (void **)&value);
  82     testassert(value == 10);
  83
  84     object_setInstanceVariable(sub, "subIvar", (id)11);
  85     testassert(sub->subIvar == (id)11);
  86
  87     ivar = class_getInstanceVariable([Sub class], "subIvar");
  88     testassert(ivar == object_getInstanceVariable(sub, "subIvar", NULL));
  89
  90     testassert(NULL == object_getInstanceVariable(sub, NULL, NULL));
  91     testassert(NULL == object_getInstanceVariable(NULL, "foo", NULL));
  92     testassert(NULL == object_getInstanceVariable(NULL, NULL, NULL));
  93     value = 10;
  94     testassert(NULL == object_getInstanceVariable(sub, NULL, (void **)&value));
  95     testassert(value == 0);
  96     value = 10;
  97     testassert(NULL == object_getInstanceVariable(NULL, "foo", (void **)&value));
  98     testassert(value == 0);
  99     value = 10;
 100     testassert(NULL == object_getInstanceVariable(NULL, NULL, (void **)&value));
 101     testassert(value == 0);
 102
 103     testassert(NULL == object_setInstanceVariable(sub, NULL, NULL));
 104     testassert(NULL == object_setInstanceVariable(NULL, "foo", NULL));
 105     testassert(NULL == object_setInstanceVariable(NULL, NULL, NULL));
 106 #endif
 107
 108     succeed(__FILE__);
 109     return 0;
 110 }