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  * An additional grant of patent rights can be found in the PATENTS file in the
   8  * same directory.
   9  *
  10  * This program is free software; you can redistribute it and/or modify it under
  11  * the terms of the GNU General Public License version 2 as published by the
  12  * Free Software Foundation. This program is dual-licensed; you may select
  13  * either version 2 of the GNU General Public License ("GPL") or BSD license
  14  * ("BSD").
  15  */
  16
  17 /* Note : this module is expected to remain private, do not expose it */
  18
  19 #ifndef ERROR_H_MODULE
  20 #define ERROR_H_MODULE
  21
  22 /* ****************************************
  23 *  Dependencies
  24 ******************************************/
  25 #include <linux/types.h> /* size_t */
  26 #include <linux/zstd.h>  /* enum list */
  27
  28 /* ****************************************
  29 *  Compiler-specific
  30 ******************************************/
  31 #define ERR_STATIC static __attribute__((unused))
  32
  33 /*-****************************************
  34 *  Customization (error_public.h)
  35 ******************************************/
  36 typedef ZSTD_ErrorCode ERR_enum;
  37 #define PREFIX(name) ZSTD_error_##name
  38
  39 /*-****************************************
  40 *  Error codes handling
  41 ******************************************/
  42 #define ERROR(name) ((size_t)-PREFIX(name))
  43
  44 ERR_STATIC unsigned ERR_isError(size_t code) { return (code > ERROR(maxCode)); }
  45
  46 ERR_STATIC ERR_enum ERR_getErrorCode(size_t code)
  47 {
  48         if (!ERR_isError(code))
  49                 return (ERR_enum)0;
  50         return (ERR_enum)(0 - code);
  51 }
  52
  53 #endif /* ERROR_H_MODULE */