void _Block_object_assign()

in src/BlocksRuntime/runtime.c [672:733]

• 25 lines of code
• 9 McCabe index (conditional complexity)

void _Block_object_assign(void *destAddr, const void *object, const int flags) {
    switch (os_assumes(flags & BLOCK_ALL_COPY_DISPOSE_FLAGS)) {
      case BLOCK_FIELD_IS_OBJECT:
        /*******
        id object = ...;
        [^{ object; } copy];
        ********/
            
        _Block_retain_object(object);
        _Block_assign((void *)object, destAddr);
        break;

      case BLOCK_FIELD_IS_BLOCK:
        /*******
        void (^object)(void) = ...;
        [^{ object; } copy];
        ********/

        _Block_assign(_Block_copy_internal(object, false), destAddr);
        break;
    
      case BLOCK_FIELD_IS_BYREF | BLOCK_FIELD_IS_WEAK:
      case BLOCK_FIELD_IS_BYREF:
        /*******
         // copy the onstack __block container to the heap
         __block ... x;
         __weak __block ... x;
         [^{ x; } copy];
         ********/
        
        _Block_byref_assign_copy(destAddr, object, flags);
        break;
        
      case BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT:
      case BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK:
        /*******
         // copy the actual field held in the __block container
         __block id object;
         __block void (^object)(void);
         [^{ object; } copy];
         ********/

        // under manual retain release __block object/block variables are dangling
        _Block_assign((void *)object, destAddr);
        break;

      case BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT | BLOCK_FIELD_IS_WEAK:
      case BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK  | BLOCK_FIELD_IS_WEAK:
        /*******
         // copy the actual field held in the __block container
         __weak __block id object;
         __weak __block void (^object)(void);
         [^{ object; } copy];
         ********/

        _Block_assign_weak(object, destAddr);
        break;

      default:
        break;
    }
}