Time time_t and string (char*) format to go with each other

In the program, we often use the transformation of the time format, such as speaking time_t into a string, or turn around, the following is the implementation of the Code. It is divided into two kinds of time formats: 2009-3-24 and 2009-3-24 0:00:08.
Time Format: 2009-3-24:

#include<sys/time.h>
/*
String to time_t
Time format, 2009-3-24
*/
intApi_stringtotime (ConstString &strdatestr,time_t &timedata)
{
Char*pbeginpos = (Char*) Strdatestr.c_str ();
Char*ppos = Strstr (Pbeginpos, "-");
if(PPOs = NULL)
{
Api_error_log (Lm_error, "strdatestr[%s] err", strdatestr.c_str ());
return-1;
}
intIyear = Atoi (Pbeginpos);
intImonth = atoi (PPOs + 1);
PPOs = strstr (PPOs + 1, "-");
if(PPOs = NULL)
{
Api_error_log (Lm_error, "strdatestr[%s] err", strdatestr.c_str ());
return-1;
}
intIday = atoi (PPOs + 1);
structTM Sourcedate;
Bzero (void*) &sourcedate,sizeof(sourcedate));
Sourcedate.tm_mday = Iday;
Sourcedate.tm_mon = iMonth-1;
Sourcedate.tm_year = iYear-1900;
Timedata = Mktime (&sourcedate);
return0;
}
/*
time_t to String
*/
intApi_timetostring (String &strdatestr,Consttime_t &timedata)
{
CharCHTMP[15];
Bzero (Chtmp,sizeof(chtmp));
structTM *p;
p = localtime (&timedata);
P->tm_year = p->tm_year + 1900;
P->tm_mon = P->tm_mon + 1;
snprintf (Chtmp,sizeof(chtmp), "%04d-%02d-%02d",
P->tm_year, P->tm_mon, P->tm_mday);
Strdatestr = chtmp;
return0;
}

Time Format 2009-3-24 0:00:08:

/*
String to time_t
Time format 2009-3-24 0:00:08 or 2009-3-24
*/
intApi_stringtotimeex (ConstString &strdatestr,time_t &timedata)
{
Char*pbeginpos = (Char*) Strdatestr.c_str ();
Char*ppos = Strstr (Pbeginpos, "-");
if(PPOs = NULL)
{
printf ("strdatestr[%s] err/n", strdatestr.c_str ());
return-1;
}
intIyear = Atoi (Pbeginpos);
intImonth = atoi (PPOs + 1);
PPOs = strstr (PPOs + 1, "-");
if(PPOs = NULL)
{
printf ("strdatestr[%s] err/n", strdatestr.c_str ());
return-1;
}
intIday = atoi (PPOs + 1);
intihour=0;
intimin=0;
intisec=0;
PPOs = strstr (PPOs + 1, "");
In order to be compatible some not accurate to the time of the seconds
if(PPOs!= NULL)
{
Ihour=atoi (PPOs + 1);
PPOs = strstr (PPOs + 1, ":");
if(PPOs!= NULL)
{
Imin=atoi (PPOs + 1);
PPOs = strstr (PPOs + 1, ":");
if(PPOs!= NULL)
{
Isec=atoi (PPOs + 1);
}
}
}
structTM Sourcedate;
Bzero (void*) &sourcedate,sizeof(sourcedate));
Sourcedate.tm_sec = ISec;
Sourcedate.tm_min = Imin;
Sourcedate.tm_hour = Ihour;
Sourcedate.tm_mday = Iday;
Sourcedate.tm_mon = iMonth-1;
Sourcedate.tm_year = iYear-1900;
Timedata = Mktime (&sourcedate);
return0;
}
/*
time_t to string time format 2009-3-24 0:00:08
*/
intApi_timetostringex (String &strdatestr,Consttime_t &timedata)
{
CharCHTMP[100];
Bzero (Chtmp,sizeof(chtmp));
structTM *p;
p = localtime (&timedata);
P->tm_year = p->tm_year + 1900;
P->tm_mon = P->tm_mon + 1;
snprintf (Chtmp,sizeof(chtmp), "%04d-%02d-%02d%02d:%02d:%02d",
P->tm_year, P->tm_mon, p->tm_mday,p->tm_hour,p->tm_min,p->tm_sec);
Strdatestr = chtmp;
return0;
}

All the code has been tested, there will be no memory leaks and handle leaks, you can safely use ~

Also attached:

The structure TM is defined as
struct TM
{
int tm_sec;
int tm_min;
int Tm_hour;
int tm_mday;
int Tm_mon;
int tm_year;
int tm_wday;
int tm_yday;
int tm_isdst;
};
int Tm_sec represents the current number of seconds, with a normal range of 0-59, but allowed to 61 seconds
int Tm_min represents current score, range 0-59
int Tm_hour The number of hours from midnight, with a range of 0-23
int Tm_mday The number of days of the current month, range 01-31
int Tm_mon represents the current month, starting from January, ranging from 0-11
int tm_year number of years since 1900
int Tm_wday The number of days in a week, starting from Monday, the range is 0-6
int Tm_yday The number of days since January 1 this year, with a range of 0-365
int TM_ISDST flag for daylight saving time

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