1 /* 2 * Copyright (c) Yann Collet, Facebook, Inc. 3 * All rights reserved. 4 * 5 * This source code is licensed under both the BSD-style license (found in the 6 * LICENSE file in the root directory of this source tree) and the GPLv2 (found 7 * in the COPYING file in the root directory of this source tree). 8 * You may select, at your option, one of the above-listed licenses. 9 */ 10 11 /* Note : this module is expected to remain private, do not expose it */ 12 13 #ifndef ERROR_H_MODULE 14 #define ERROR_H_MODULE 15 16 17 18 /* **************************************** 19 * Dependencies 20 ******************************************/ 21 #include "zstd_deps.h" /* size_t */ 22 #include <linux/zstd_errors.h> /* enum list */ 23 24 25 /* **************************************** 26 * Compiler-specific 27 ******************************************/ 28 #define ERR_STATIC static __attribute__((unused)) 29 30 31 /*-**************************************** 32 * Customization (error_public.h) 33 ******************************************/ 34 typedef ZSTD_ErrorCode ERR_enum; 35 #define PREFIX(name) ZSTD_error_##name 36 37 38 /*-**************************************** 39 * Error codes handling 40 ******************************************/ 41 #undef ERROR /* already defined on Visual Studio */ 42 #define ERROR(name) ZSTD_ERROR(name) 43 #define ZSTD_ERROR(name) ((size_t)-PREFIX(name)) 44 45 ERR_STATIC unsigned ERR_isError(size_t code) { return (code > ERROR(maxCode)); } 46 47 ERR_STATIC ERR_enum ERR_getErrorCode(size_t code) { if (!ERR_isError(code)) return (ERR_enum)0; return (ERR_enum) (0-code); } 48 49 /* check and forward error code */ 50 #define CHECK_V_F(e, f) size_t const e = f; if (ERR_isError(e)) return e 51 #define CHECK_F(f) { CHECK_V_F(_var_err__, f); } 52 53 54 /*-**************************************** 55 * Error Strings 56 ******************************************/ 57 58 const char* ERR_getErrorString(ERR_enum code); /* error_private.c */ 59 60 ERR_STATIC const char* ERR_getErrorName(size_t code) 61 { 62 return ERR_getErrorString(ERR_getErrorCode(code)); 63 } 64 65 66 #endif /* ERROR_H_MODULE */ 67