test/ivar.m

   1 // TEST_CONFIG
   2
   3 #include "test.h"
   4 #include <stdint.h>
   5 #include <string.h>
   6 #include <objc/objc-runtime.h>
   7
   8 @interface Super {
   9   @public
  10     id isa;
  11   char superIvar;
  12 }
  13 @end
  14
  15 @implementation Super
  16 +(void)initialize { }
  17 +class { return self; }
  18 +new { return class_createInstance(self, 0); }
  19 @end
  20
  21
  22 @interface Sub : Super {
  23   @public
  24     uintptr_t subIvar;
  25 }
  26 @end
  27
  28 @implementation Sub @end
  29
  30
  31 int main()
  32 {
  33     /*
  34        Runtime layout of Sub:
  35          [0] isa
  36          [1] superIvar
  37          [2] subIvar
  38     */
  39
  40     Ivar ivar;
  41     uintptr_t value;
  42     Sub *sub = [Sub new];
  43     sub->subIvar = 10;
  44     testassert(((uintptr_t *)sub)[2] == 10);
  45
  46     ivar = class_getInstanceVariable([Sub class], "subIvar");
  47     testassert(ivar);
  48     testassert(2*sizeof(intptr_t) == (size_t)ivar_getOffset(ivar));
  49     testassert(0 == strcmp(ivar_getName(ivar), "subIvar"));
  50 #if __LP64__
  51     testassert(0 == strcmp(ivar_getTypeEncoding(ivar), "Q"));
  52 #elif __clang__
  53     testassert(0 == strcmp(ivar_getTypeEncoding(ivar), "L"));
  54 #else
  55     testassert(0 == strcmp(ivar_getTypeEncoding(ivar), "I"));
  56 #endif
  57
  58     ivar = class_getInstanceVariable([Super class], "superIvar");
  59     testassert(ivar);
  60     testassert(sizeof(intptr_t) == (size_t)ivar_getOffset(ivar));
  61     testassert(0 == strcmp(ivar_getName(ivar), "superIvar"));
  62     testassert(0 == strcmp(ivar_getTypeEncoding(ivar), "c"));
  63     testassert(ivar == class_getInstanceVariable([Sub class], "superIvar"));
  64
  65     ivar = class_getInstanceVariable([Super class], "subIvar");
  66     testassert(!ivar);
  67
  68     ivar = class_getInstanceVariable([Sub class]->isa, "subIvar");
  69     testassert(!ivar);
  70
  71
  72     sub->subIvar = 10;
  73     value = 0;
  74     object_getInstanceVariable(sub, "subIvar", (void **)&value);
  75     testassert(value == 10);
  76
  77     object_setInstanceVariable(sub, "subIvar", (void *)11);
  78     testassert(sub->subIvar == 11);
  79
  80     ivar = class_getInstanceVariable([Sub class], "subIvar");
  81     object_setIvar(sub, ivar, (id)12);
  82     testassert(sub->subIvar == 12);
  83     testassert((id)12 == object_getIvar(sub, ivar));
  84
  85     ivar = class_getInstanceVariable([Sub class], "subIvar");
  86     testassert(ivar == object_getInstanceVariable(sub, "subIvar", NULL));
  87
  88
  89     testassert(NULL == class_getInstanceVariable(NULL, "foo"));
  90     testassert(NULL == class_getInstanceVariable([Sub class], NULL));
  91     testassert(NULL == class_getInstanceVariable(NULL, NULL));
  92
  93     testassert(NULL == object_getIvar(sub, NULL));
  94     testassert(NULL == object_getIvar(NULL, ivar));
  95     testassert(NULL == object_getIvar(NULL, NULL));
  96
  97     testassert(NULL == object_getInstanceVariable(sub, NULL, NULL));
  98     testassert(NULL == object_getInstanceVariable(NULL, "foo", NULL));
  99     testassert(NULL == object_getInstanceVariable(NULL, NULL, NULL));
 100     value = 10;
 101     testassert(NULL == object_getInstanceVariable(sub, NULL, (void **)&value));
 102     testassert(value == 0);
 103     value = 10;
 104     testassert(NULL == object_getInstanceVariable(NULL, "foo", (void **)&value));
 105     testassert(value == 0);
 106     value = 10;
 107     testassert(NULL == object_getInstanceVariable(NULL, NULL, (void **)&value));
 108     testassert(value == 0);
 109
 110     object_setIvar(sub, NULL, NULL);
 111     object_setIvar(NULL, ivar, NULL);
 112     object_setIvar(NULL, NULL, NULL);
 113
 114     testassert(NULL == object_setInstanceVariable(sub, NULL, NULL));
 115     testassert(NULL == object_setInstanceVariable(NULL, "foo", NULL));
 116     testassert(NULL == object_setInstanceVariable(NULL, NULL, NULL));
 117
 118     succeed(__FILE__);
 119     return 0;
 120 }