/home/vlg/develop/libASSA/libassa/assa/Logger_Impl.cpp

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// -*- c++ -*-
//------------------------------------------------------------------------------
//                              assa/Logger_Impl.cpp
//------------------------------------------------------------------------------
// $Id: Logger_Impl.cpp,v 1.5 2006/07/20 02:30:54 vlg Exp $
//------------------------------------------------------------------------------
//  Copyright (c) 2001 by Vladislav Grinchenko
//
//  This library is free software; you can redistribute it and/or
//  modify it under the terms of the GNU Library General Public
//  License as published by the Free Software Foundation; either
//  version 2 of the License, or (at your option) any later version.
//------------------------------------------------------------------------------

#include <iostream>
#include <iomanip>
#include <string.h>             // strerror(3)

#include "assa/TimeVal.h"
#include "assa/Logger_Impl.h"

#if defined (WIN32)
#  include <windows.h>          // for vsnprintf() bug
#endif

using namespace ASSA;

char Logger_Impl::m_msgbuf [LOGGER_MAXLINE];

u_short 
Logger_Impl::
add_timestamp (ostream& sink_)
{
    /*--- 'DD/MM/CC HH:MM:SS.MMMM ' - 23 chars ---*/
    u_short bytecount = 0;

    if (timestamp_enabled ()) {
        TimeVal tv = TimeVal::gettimeofday ();
        tv.tz (m_tz);
        sink_ << tv.fmtString ("%m/%d/%Y %H:%M:%S") << '.';
        char oldfill = sink_.fill('0');
        sink_ << std::setw (3) << (tv.msec () % 1000000)/1000 << ' ';
        sink_.fill (oldfill);
        bytecount = 23;
    }
    return bytecount;
}

u_short 
Logger_Impl::
indent_func_name (ostream&      sink_,  
                  const string& func_name_,
                  size_t        indent_level_,
                  marker_t      type_)
{
    u_short bytecount = 0;

    if (func_name_.size ()) {
        u_int i = 1; 
        while (i < indent_level_) { 
            sink_ << '|';
            for (u_short j = 0; j < m_indent_step-1; j++) {
                sink_ << ' ';
            }
            i++;
        }
        if (type_ == FUNC_ENTRY) {
            sink_ << '/' << func_name_ << "  ";
        }
        else if (type_ == FUNC_EXIT) {
            sink_ << '\\' << func_name_ << "  ";
        }
        else if (type_ == FUNC_MSG) {
            sink_ << '[' << func_name_ << "] ";
        }
        bytecount += indent_level_ * m_indent_step + func_name_.size () + 3;
    }
    return bytecount;
}

char* 
Logger_Impl::
format_msg (size_t      expected_sz_, 
            const char* fmt_, 
            va_list     vap_, 
            bool&       release_) // tell the caller it needs to release memory
{
    char* msg = m_msgbuf;       // Use internal buffer
    int ret = 0;

    release_ = false;
    expected_sz_++;             // Expected size includes '\0'

    if (expected_sz_ >= LOGGER_MAXLINE) { // Allocate temporary buffer
        msg = new char [expected_sz_];
        release_ = true;
    }

    ret = ::vsnprintf (msg, expected_sz_, fmt_, vap_);
#if NEVER
    if (ret < 0) {
        std::cout << "Logger_Impl: format_mg(expected_sz=" << expected_sz_
                  << ")=-1 failed! errno=" << errno << " ("
                  << strerror(errno) << "\n" << std::flush;
    }
#endif

    return (ret < 0 ? NULL : msg);
}

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