ceph/src/zstd/contrib/linux-kernel/lib/zstd/error_private.h

   1 /**
   2  * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
   3  * All rights reserved.
   4  *
   5  * This source code is licensed under the BSD-style license found in the
   6  * LICENSE file in the root directory of https://github.com/facebook/zstd.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it under
   9  * the terms of the GNU General Public License version 2 as published by the
  10  * Free Software Foundation. This program is dual-licensed; you may select
  11  * either version 2 of the GNU General Public License ("GPL") or BSD license
  12  * ("BSD").
  13  */
  14
  15 /* Note : this module is expected to remain private, do not expose it */
  16
  17 #ifndef ERROR_H_MODULE
  18 #define ERROR_H_MODULE
  19
  20 /* ****************************************
  21 *  Dependencies
  22 ******************************************/
  23 #include <linux/types.h> /* size_t */
  24 #include <linux/zstd.h>  /* enum list */
  25
  26 /* ****************************************
  27 *  Compiler-specific
  28 ******************************************/
  29 #define ERR_STATIC static __attribute__((unused))
  30
  31 /*-****************************************
  32 *  Customization (error_public.h)
  33 ******************************************/
  34 typedef ZSTD_ErrorCode ERR_enum;
  35 #define PREFIX(name) ZSTD_error_##name
  36
  37 /*-****************************************
  38 *  Error codes handling
  39 ******************************************/
  40 #define ERROR(name) ((size_t)-PREFIX(name))
  41
  42 ERR_STATIC unsigned ERR_isError(size_t code) { return (code > ERROR(maxCode)); }
  43
  44 ERR_STATIC ERR_enum ERR_getErrorCode(size_t code)
  45 {
  46         if (!ERR_isError(code))
  47                 return (ERR_enum)0;
  48         return (ERR_enum)(0 - code);
  49 }
  50
  51 #endif /* ERROR_H_MODULE */