Source code of Windows XP (NT5)
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//+-------------------------------------------------------------------------
//
// Microsoft Windows
//
// Copyright (C) Microsoft Corporation, 2000
//
// File: print.cpp
//
//--------------------------------------------------------------------------
#include "pch.h"
#pragma hdrstop
#include <stdio.h>
#include "print.h"
CPrint::CPrint(
BOOL bVerbose,
LPCWSTR pszLogFile // optional. Default is NULL.
) : m_bVerbose(bVerbose),
m_pfLog(NULL)
{
if (NULL != pszLogFile)
{
//
// Open the log file.
//
m_pfLog = _wfopen(pszLogFile, L"w");
if (NULL == m_pfLog)
{
fwprintf(stderr, L"Unable to open log file \"%s\"\n", pszLogFile);
fprintf(stderr, _strerror("Reason: "));
fwprintf(stderr, L"Output will go to stderr\n");
}
}
if (NULL == m_pfLog)
{
//
// If no log file is specified or if we failed to open the specified
// log file, default to stderr.
//
m_pfLog = stderr;
}
}
CPrint::~CPrint(
void
)
{
if (NULL != m_pfLog && stderr != m_pfLog)
{
fclose(m_pfLog);
}
}
//
// Some simple printing functions that handle verbose vs. non-verbose mode.
// The output is directed at whatever stream m_pfLog refers to.
// If the user specified a log file on the command line, and that file
// could be opened, all output goes to that file. Otherwise, it
// defaults to stderr.
//
void
CPrint::_Print(
LPCWSTR pszFmt,
va_list args
) const
{
TraceAssert(NULL != m_pfLog);
TraceAssert(NULL != pszFmt);
vfwprintf(m_pfLog, pszFmt, args);
}
//
// Output regardless of "verbose" mode.
//
void
CPrint::PrintAlways(
LPCWSTR pszFmt,
...
) const
{
va_list args;
va_start(args, pszFmt);
_Print(pszFmt, args);
va_end(args);
}
//
// Output only in "verbose" mode.
// Verbose is turned on with the -v cmd line switch.
//
void
CPrint::PrintVerbose(
LPCWSTR pszFmt,
...
) const
{
if (m_bVerbose)
{
va_list args;
va_start(args, pszFmt);
_Print(pszFmt, args);
va_end(args);
}
}