LXR linux/lib/zstd/error

   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******************************************/
  36typedef 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
  44ERR_STATIC unsigned ERR_isError(size_t code) { return (code > ERROR(maxCode)); }
  45
  46ERR_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 */
  54