方便、好用、强大的Symbian日志类，请务必收藏～

来源：互联网发布：caffe 中文教程编辑：程序博客网时间：2024/04/28 04:52

Symbian平台上高效调试软件是一个大问题，相对而言，使用文件系统写日志是比较靠得住的方法。但Symbian本身提供的日志类有多种不方便的限制，所以提供以下方便好用、且能直接编译通过的日志类给大家使用（基本没有任何多余的代码，精简高效），希望大家多多收藏使用。

备注：下列代码适合单线程使用，若想使用在多线程工程项目中，请自行替换RFs对象，自己管理该对象。这样就完全可以放心的在多线程中使用，让你快速有效的抓臭虫。（解决不了的可以私下找我。呵呵，写这么多还是因为我没有一点分数，赚点分，想发另一个更深层次的问题）

CTraceLog类头文件：

/*
============================================================================
Name : TraceLog.h
Author : Alex
Version : 1.0
Copyright : Your copyright notice
Description : CTraceLog declaration
============================================================================
*/
#ifndef TRACELOG_H
#define TRACELOG_H
// INCLUDES
#include <e32std.h>
#include <e32base.h>
#include <f32file.h>
#include <S32FILE.H>
#include <e32def.h>
// CLASS DECLARATION
class CTraceLog;
extern CTraceLog* g_TraceLog;
#define LOCAL_TRACE
#ifdef LOCAL_TRACE
#define TRACE g_TraceLog->OutPutlog
#else
#define TRACE
#endif
/**
* CTraceLog
*
*/
class CTraceLog : public CBase
{
public:
// Constructors and destructor
/**
* Destructor.
*/
~CTraceLog();
/**
* Two-phased constructor.
*/
static void BeginDebugL(const TDesC& aLogFileName);
static void StopDebugL();
void OutPutlog(TRefByValue< const TDesC16 > aFmt,...);
void OutPutlog(TRefByValue< const TDesC8 > aFmt,...);
void OutPutlog(const char *aFmt,...);
void OutPutlog(const char *aFmt, VA_LIST aParamList);
private:
/**
* Two-phased constructor.
*/
static CTraceLog* NewLC(const TDesC& aLogFileName);
/**
* Constructor for performing 1st stage construction
*/
CTraceLog();
/**
* EPOC default constructor for performing 2nd stage construction
*/
void ConstructL(const TDesC& aLogFileName);
private:
RFile iFile;
RFileWriteStream iOutputStream;
TTime iTraceTime;
HBufC* iLogBuf16;
HBufC8* iLogBuf8;
};
#endif // TRACELOG_H

复制代码

CTraceLog类实现代码：

/*
============================================================================
Name : TraceLog.cpp
Author : Alex
Version : 1.0
Copyright : Your copyright notice
Description : CTraceLog implementation
============================================================================
*/
#include "TraceLog.h"
#include <COEMAIN.H>
_LIT(KTimeFormat,"[%Y%M%D%1-%2-%3 %H:%T:%S] ");
_LIT(KLogFileFormat,"C://data//%S_log.txt");
_LIT(K16LogLevel0," <Trace >: ");
_LIT(K16LogLevel1," <Error>: ");
_LIT(K16LogEOF,"/r/n");
_LIT8(K8LogLevel0," <Info >: ");
_LIT8(K8LogLevel1," <Error>: ");
_LIT8(K8LogEOF,"/r/n");
const TInt KMaxLogSize = 1024;
CTraceLog* g_TraceLog = NULL;
CTraceLog::CTraceLog()
{
// No implementation required
}
CTraceLog::~CTraceLog()
{
delete iLogBuf16;
iLogBuf16 = NULL;
delete iLogBuf8;
iLogBuf8 = NULL;
iOutputStream.Close();
iFile.Close();
}
CTraceLog* CTraceLog::NewLC(const TDesC& aLogFileName)
{
CTraceLog* self = new (ELeave) CTraceLog();
CleanupStack::PushL(self);
self->ConstructL(aLogFileName);
return self;
}
void CTraceLog::BeginDebugL(const TDesC& aLogFileName)
{
#ifdef LOCAL_TRACE
g_TraceLog = CTraceLog::NewLC(aLogFileName);
CleanupStack::Pop();
#endif
}
void CTraceLog::StopDebugL()
{
if(g_TraceLog != NULL)
{
delete g_TraceLog;
g_TraceLog = NULL;
}
}
void CTraceLog::ConstructL(const TDesC& aLogFileName)
{
TInt ret;
TFileName fileName;
fileName.Format(KLogFileFormat,&aLogFileName);
ret = CCoeEnv::Static()->FsSession().MkDirAll(fileName);
if( (KErrNone!=ret) && (KErrAlreadyExists!=ret) )
{
ASSERT(0);
}
User::LeaveIfError(iFile.Replace(CCoeEnv::Static()->FsSession(),
fileName,
EFileWrite|EFileRead|EFileShareAny) );
iOutputStream.Attach(iFile);
iLogBuf16 = HBufC16::NewL(KMaxLogSize);
iLogBuf8 = HBufC8::NewL(KMaxLogSize);
}
void CTraceLog::OutPutlog(TRefByValue< const TDesC16 > aFmt,...)
{
TPtr logBufPtr = iLogBuf16->Des();
iTraceTime.HomeTime();
iTraceTime.FormatL(logBufPtr,KTimeFormat);
VA_LIST ap;
VA_START(ap,aFmt);
logBufPtr.AppendFormatList(aFmt,ap);
VA_END(ap);
logBufPtr.Append(K16LogEOF);
iOutputStream.WriteL(logBufPtr);
iOutputStream.CommitL();
}
void CTraceLog::OutPutlog(TRefByValue< const TDesC8 > aFmt,...)
{
TBuf<30> tmpTimeBuf;
iTraceTime.HomeTime();
iTraceTime.FormatL(tmpTimeBuf,KTimeFormat);
TPtr logBufPtr = iLogBuf16->Des();
TPtr8 logBuf8Ptr = iLogBuf8->Des();
VA_LIST ap;
VA_START(ap,aFmt);
logBuf8Ptr.FormatList(aFmt,ap);
VA_END(ap);
logBuf8Ptr.Append(K8LogEOF);
logBufPtr.Copy(logBuf8Ptr);
logBufPtr.Insert(0,tmpTimeBuf);
iOutputStream.WriteL(logBufPtr);
iOutputStream.CommitL();
}
void CTraceLog::OutPutlog(const char *aFmt,...)
{
TBuf<30> tmpTimeBuf;
iTraceTime.HomeTime();
iTraceTime.FormatL(tmpTimeBuf,KTimeFormat);
TPtr logBufPtr = iLogBuf16->Des();
TPtr8 logBuf8Ptr = iLogBuf8->Des();
TPtrC8 fmt((TUint8*)aFmt);
VA_LIST ap;
VA_START(ap,aFmt);
logBuf8Ptr.FormatList(fmt,ap);
VA_END(ap);
logBuf8Ptr.Append(K8LogEOF);
logBufPtr.Copy(logBuf8Ptr);
logBufPtr.Insert(0,tmpTimeBuf);
iOutputStream.WriteL(logBufPtr);
iOutputStream.CommitL();
}
void CTraceLog::OutPutlog(const char *aFmt, VA_LIST aParamList)
{
TBuf<30> tmpTimeBuf;
iTraceTime.HomeTime();
iTraceTime.FormatL(tmpTimeBuf,KTimeFormat);
TPtr logBufPtr = iLogBuf16->Des();
TPtr8 logBuf8Ptr = iLogBuf8->Des();
TPtrC8 fmt((TUint8*)aFmt);
logBuf8Ptr.FormatList(fmt,aParamList);
logBuf8Ptr.Append(K8LogEOF);
logBufPtr.Copy(logBuf8Ptr);
logBufPtr.Insert(0,tmpTimeBuf);
iOutputStream.WriteL(logBufPtr);
iOutputStream.CommitL();
}