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 ERR_isError(size_t code)44ERR_STATIC unsigned ERR_isError(size_t code) { return (code > ERROR(maxCode)); } 45 ERR_getErrorCode(size_t code)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