text: /*
   * Copyright (c) 2015-2017 Dmitry V. Levin <ldv@altlinux.org>
   * Copyright (c) 2017-2018 The strace developers.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. The name of the author may not be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef STRACE_NEGATED_ERRNO_H
  #define STRACE_NEGATED_ERRNO_H
  
  /*
   * Check the syscall return value register value for whether it is
   * a negated errno code indicating an error, or a success return value.
   */
  static inline bool
  is_negated_errno(kernel_ulong_t val)
  {
  	kernel_ulong_t max = -(kernel_long_t) MAX_ERRNO_VALUE;
  
  #ifndef current_klongsize
  	if (current_klongsize < sizeof(val)) {
  		val = (uint32_t) val;
  		max = (uint32_t) max;
  	}
  #endif /* !current_klongsize */
  
  	return val >= max;
  }
  
  #endif /* !STRACE_NEGATED_ERRNO_H */
  