lib/zstd/error_private.h

   1 /* SPDX-License-Identifier: (GPL-2.0 or BSD-3-Clause-Clear) */
   2 /**
   3  * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
   4  * All rights reserved.
   5  */
   6
   7 /* Note : this module is expected to remain private, do not expose it */
   8
   9 #ifndef ERROR_H_MODULE
  10 #define ERROR_H_MODULE
  11
  12 /* ****************************************
  13 *  Dependencies
  14 ******************************************/
  15 #include <linux/types.h> /* size_t */
  16 #include <linux/zstd.h>  /* enum list */
  17
  18 /* ****************************************
  19 *  Compiler-specific
  20 ******************************************/
  21 #define ERR_STATIC static __attribute__((unused))
  22
  23 /*-****************************************
  24 *  Customization (error_public.h)
  25 ******************************************/
  26 typedef ZSTD_ErrorCode ERR_enum;
  27 #define PREFIX(name) ZSTD_error_##name
  28
  29 /*-****************************************
  30 *  Error codes handling
  31 ******************************************/
  32 #define ERROR(name) ((size_t)-PREFIX(name))
  33
  34 ERR_STATIC unsigned ERR_isError(size_t code) { return (code > ERROR(maxCode)); }
  35
  36 ERR_STATIC ERR_enum ERR_getErrorCode(size_t code)
  37 {
  38         if (!ERR_isError(code))
  39                 return (ERR_enum)0;
  40         return (ERR_enum)(0 - code);
  41 }
  42
  43 #endif /* ERROR_H_MODULE */