#include <vm/fzl_vm.h>
#include <vm/internals/opcode.h>

int op_not(fzl_vm_t *vm)
{
  if (vm->dtop < 1)
  {
    snprintf(last_err, sizeof(last_err),
             "runtime error - expected value in data stack");
    print_err_data(vm);
    return -1;
  }

  fzl_value_t notval = vm->dstack[--vm->dtop];
  vm->dstack[vm->dtop++] =
      (fzl_value_t){.type = FZL_TYPE_BOOL, .as.b = !notval.as.b};
  return 0;
}