static NSUInteger FBGetMinimumIvarIndex()

in FBRetainCycleDetector/Layout/Classes/FBClassStrongLayout.mm [141:155]

• 12 lines of code
• 2 McCabe index (conditional complexity)

static NSUInteger FBGetMinimumIvarIndex(__unsafe_unretained Class aCls) {
  NSUInteger minimumIndex = 1;
  unsigned int count;
  Ivar *ivars = class_copyIvarList(aCls, &count);

  if (count > 0) {
    Ivar ivar = ivars[0];
    ptrdiff_t offset = ivar_getOffset(ivar);
    minimumIndex = offset / (sizeof(void *));
  }

  free(ivars);

  return minimumIndex;
}