警告:已弃用从字符串常量到"char*"的转换
warning: deprecated conversion from string constant to âchar*â
我有一段c++代码,它与gcc版本4.1.2 20071124一起工作良好,但与gcc版本4.4.6 20120305一起发出警告。请建议:
代码:WriteLog(sgca_log_file,"Exception occured in load_sgsn_cdr_arch n",true);
警告:deprecated conversion from string constant to 'char*'
其中Writelog是打印指定日志文件中的日志的功能:
void WriteLog(const char* fileName, const char* pLogMsg, bool pTimeRequired)
{
FILE *lFileDesc = NULL;
char lMessage[1000];
char lBuffer[1000];
char lDate[1000];
time_t lRawtime;
struct tm * lTimeinfo;
char LoaderLogFile[80];
char loaderHome[30];
char * pch;
char szdir[30];
try
{
memset(LoaderLogFile, ' ',80);
memset(lMessage, ' ', 1000);
memset(lBuffer, ' ', 1000);
memset(lDate, ' ', 1000);
time(&lRawtime);
lTimeinfo = localtime(&lRawtime);
strftime(lBuffer, 1000, "| %x - %X | ", lTimeinfo);
strftime(lDate, 1000, "%Y_%m_%d", lTimeinfo);
if (!strcmp(fileName,"default"))
{
strcpy(loaderHome, getenv("LOADER_HOME"));
sprintf(LoaderLogFile,"%s/log/Loader_%s.log",loaderHome,lDate);
}
else
sprintf(LoaderLogFile,"%s_%s.log",fileName,lDate);
if (!file_exists(LoaderLogFile))
{
if((pch=strrchr(LoaderLogFile,'/')) != ' ')
{
strncpy(szdir,LoaderLogFile,pch-LoaderLogFile+1);
if(file_exists(szdir))
{
lFileDesc = fopen(LoaderLogFile, "a");
fflush(lFileDesc);
fclose(lFileDesc);
}
else
{
sprintf (lBuffer,"Directory %s doesnot exist. Please check the configurations. Stopping the System. n",szdir);
WriteLog("default",lBuffer,true);
StopSystem("default",lBuffer);
}
}
else
{
sprintf (lBuffer,"Invalid log file name %s n",LoaderLogFile);
WriteLog("default",lBuffer,true);
StopSystem("default",lBuffer);
}
}
//! Check whether the timestamp also has to be written in the log file
if(pTimeRequired)
{
sprintf(lMessage, "%s%sn", lBuffer, pLogMsg);
}
else
{
sprintf(lMessage, "%sn", pLogMsg);
}
//! Open the log file in append mode
lFileDesc = fopen(LoaderLogFile, "a");
if(lFileDesc != NULL)
{
fprintf(lFileDesc, lMessage);
fflush(lFileDesc);
fclose(lFileDesc);
}
else
{
printf("Unable to open the file n");
}
}
catch(...)
{
printf("Exception occured in WriteLog n");
}
}
我要声明
void WriteLog(const char* fileName, const char* pLogMsg,
bool pTimeRequired);
因为很可能你不会改变fileName
或者pLogMsg
这是因为字符串字面值是不可修改的。但是为了向后兼容,它们被允许被处理为char*
而不是const char*
。
通过将函数更改为:
来消除警告void WriteLog(char* fileName, const char* pLogMsg, bool pTimeRequired);
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