1/*
2 * Copyright (c) 2016-present, 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#if defined (__cplusplus)
17extern "C" {
18#endif
19
20
21/* ****************************************
22* Dependencies
23******************************************/
24#include <stddef.h> /* size_t */
25#include "zstd_errors.h" /* enum list */
26
27
28/* ****************************************
29* Compiler-specific
30******************************************/
31#if defined(__GNUC__)
32# define ERR_STATIC static __attribute__((unused))
33#elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
34# define ERR_STATIC static inline
35#elif defined(_MSC_VER)
36# define ERR_STATIC static __inline
37#else
38# define ERR_STATIC static /* this version may generate warnings for unused static functions; disable the relevant warning */
39#endif
40
41
42/*-****************************************
43* Customization (error_public.h)
44******************************************/
45typedef ZSTD_ErrorCode ERR_enum;
46#define PREFIX(name) ZSTD_error_##name
47
48
49/*-****************************************
50* Error codes handling
51******************************************/
52#undef ERROR /* reported already defined on VS 2015 (Rich Geldreich) */
53#define ERROR(name) ZSTD_ERROR(name)
54#define ZSTD_ERROR(name) ((size_t)-PREFIX(name))
55
56ERR_STATIC unsigned ERR_isError(size_t code) { return (code > ERROR(maxCode)); }
57
58ERR_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
65const char* ERR_getErrorString(ERR_enum code); /* error_private.c */
66
67ERR_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 */
77