libs-base/Source/ObjectiveC2/caps.c

#include "capabilities.h"
#include <stdint.h>

/**
 * Bitmask of all of the capabilities compiled into this version of the
 * runtime.
 */
static const int32_t caps = 0
  | (1 << OBJC_CAP_EXCEPTIONS)
  | (1 << OBJC_CAP_SYNCRONIZE)
  | (1 << OBJC_CAP_PROPERTIES);

int objc_test_capability(int x)
{
  if (x >= 32)
    {
      return 0;
    }
  if (caps & (1 << x))
    {
      return 1;
    }
  return 0;
}