SysErrorDetail.h

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/*
 * Copyright (C) 1996-2023 The Squid Software Foundation and contributors
 *
 * Squid software is distributed under GPLv2+ license and includes
 * contributions from numerous individuals and organizations.
 * Please see the COPYING and CONTRIBUTORS files for details.
 */
 
#ifndef _SQUID_SRC_ERROR_SYSERRORDETAIL_H
#define _SQUID_SRC_ERROR_SYSERRORDETAIL_H
 
#include "error/Detail.h"
#include "sbuf/forward.h"
 
class SysErrorDetail: public ErrorDetail
{
    MEMPROXY_CLASS(SysErrorDetail);
 
public:
    static ErrorDetail::Pointer NewIfAny(const int errorNo)
    {
        // we could optimize by caching results for (frequently used?) errnos
        return errorNo ? new SysErrorDetail(errorNo) : nullptr;
    }
 
    static SBuf Brief(int errorNo);
 
    /* ErrorDetail API */
    SBuf brief() const override;
    SBuf verbose(const HttpRequestPointer &) const override;
 
private:
    // hidden by NewIfAny() to avoid creating SysErrorDetail from zero errno
    explicit SysErrorDetail(const int anErrorNo): errorNo(anErrorNo) {}
 
    int errorNo; 
};
 
class ReportSysError
{
public:
    explicit ReportSysError(const int anErrorNo): errorNo(anErrorNo) {}
    int errorNo;
};
 
std::ostream &operator <<(std::ostream &, ReportSysError);
 
#endif /* _SQUID_SRC_ERROR_SYSERRORDETAIL_H */