FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/module/zstd/lib/common/error_private.h

     /*
      * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
      * All rights reserved.
      *
      * This source code is licensed under both the BSD-style license (found in the
      * LICENSE file in the root directory of this source tree) and the GPLv2 (found
      * in the COPYING file in the root directory of this source tree).
      * You may select, at your option, one of the above-listed licenses.
      */
    
    /* Note : this module is expected to remain private, do not expose it */
    
    #ifndef ERROR_H_MODULE
    #define ERROR_H_MODULE
    
    #if defined (__cplusplus)
    extern "C" {
    #endif
    
    
    /* ****************************************
    *  Dependencies
    ******************************************/
    #include <stddef.h>        /* size_t */
    #include "zstd_errors.h"  /* enum list */
    
    
    /* ****************************************
    *  Compiler-specific
    ******************************************/
    #if defined(__GNUC__)
    #  define ERR_STATIC static __attribute__((unused))
    #elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
    #  define ERR_STATIC static inline
    #elif defined(_MSC_VER)
    #  define ERR_STATIC static __inline
    #else
    #  define ERR_STATIC static  /* this version may generate warnings for unused static functions; disable the relevant warning */
    #endif
    
    
    /*-****************************************
    *  Customization (error_public.h)
    ******************************************/
    typedef ZSTD_ErrorCode ERR_enum;
    #define PREFIX(name) ZSTD_error_##name
    
    
    /*-****************************************
    *  Error codes handling
    ******************************************/
    #undef ERROR   /* already defined on Visual Studio */
    #define ERROR(name) ZSTD_ERROR(name)
    #define ZSTD_ERROR(name) ((size_t)-PREFIX(name))
    
    ERR_STATIC unsigned ERR_isError(size_t code) { return (code > ERROR(maxCode)); }
    
    ERR_STATIC ERR_enum ERR_getErrorCode(size_t code) { if (!ERR_isError(code)) return (ERR_enum)0; return (ERR_enum) (0-code); }
    
    /* check and forward error code */
    #define CHECK_V_F(e, f) size_t const e = f; if (ERR_isError(e)) return e
    #define CHECK_F(f)   { CHECK_V_F(_var_err__, f); }
    
    
    /*-****************************************
    *  Error Strings
    ******************************************/
    
    const char* ERR_getErrorString(ERR_enum code);   /* error_private.c */
    
    ERR_STATIC const char* ERR_getErrorName(size_t code)
    {
        return ERR_getErrorString(ERR_getErrorCode(code));
    }
    
    #if defined (__cplusplus)
    }
    #endif
    
    #endif /* ERROR_H_MODULE */

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