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 this source tree. An additional grant

     7  * of patent rights can be found in the PATENTS file in the same directory.

     8  */

     9 

    10 /* Note : this module is expected to remain private, do not expose it */

    11 

    12 #ifndef ERROR_H_MODULE

    13 #define ERROR_H_MODULE

    14 

    15 #if defined (__cplusplus)

    16 extern "C" {

    17 #endif

    18 

    19 

    20 /* ****************************************

    21 *  Dependencies

    22 ******************************************/

    23 #include <stddef.h>        /* size_t */

    24 #include "zstd_errors.h"  /* enum list */

    25 

    26 

    27 /* ****************************************

    28 *  Compiler-specific

    29 ******************************************/

    30 #if defined(__GNUC__)

    31 #  define ERR_STATIC static __attribute__((unused))

    32 #elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)

    33 #  define ERR_STATIC static inline

    34 #elif defined(_MSC_VER)

    35 #  define ERR_STATIC static __inline

    36 #else

    37 #  define ERR_STATIC static  /* this version may generate warnings for unused static functions; disable the relevant warning */

    38 #endif

    39 

    40 

    41 /*-****************************************

    42 *  Customization (error_public.h)

    43 ******************************************/

    44 typedef ZSTD_ErrorCode ERR_enum;

    45 #define PREFIX(name) ZSTD_error_##name

    46 

    47 

    48 /*-****************************************

    49 *  Error codes handling

    50 ******************************************/

    51 #ifdef ERROR

    52 #  undef ERROR   /* reported already defined on VS 2015 (Rich Geldreich) */

    53 #endif

    54 #define ERROR(name) ((size_t)-PREFIX(name))

    55 

    56 ERR_STATIC unsigned ERR_isError(size_t code) { return (code > ERROR(maxCode)); }

    57 

    58 ERR_STATIC ERR_enum ERR_getErrorCode(size_t code) { if (!ERR_isError(code)) return (ERR_enum)0; return (ERR_enum) (0-code); }

    59 

    60 

    61 /*-****************************************

    62 *  Error Strings

    63 ******************************************/

    64 

    65 const char* ERR_getErrorString(ERR_enum code);   /* error_private.c */

    66 

    67 ERR_STATIC const char* ERR_getErrorName(size_t code)

    68 {

    69     return ERR_getErrorString(ERR_getErrorCode(code));

    70 }

    71 

    72 #if defined (__cplusplus)

    73 }

    74 #endif

    75 

    76 #endif /* ERROR_H_MODULE */