time.inl

ecos为实时嵌入式操作系统

    for (__result->tm_mon = 0;
         __result->tm_mday > _months_p[__result->tm_mon];
         ++__result->tm_mon) {
        
        __result->tm_mday -= _months_p[__result->tm_mon];

    } // for

    // The month day is now in the range 0..30
    // We move it to 1..31
    ++__result->tm_mday;
    
    _tim -= __result->tm_yday*CYGNUM_LIBC_TIME_SECSPERDAY;

    // hours, mins secs
    __result->tm_hour = (int) (_tim / 3600);
    _tim %= 3600;
    __result->tm_min  = (int) (_tim / 60);
    __result->tm_sec  = (int) (_tim % 60);

    __result->tm_isdst = 0; // gmtime always returns non-DST

    CYG_REPORT_RETVAL(__result);

    return __result;
} // __gmtime_r()

# ifdef CYGFUN_LIBC_TIME_POSIX
#  define gmtime_r(__timer, __result) __gmtime_r(__timer, __result)
# endif

#else

extern struct tm *
__gmtime_r( const time_t *__timer, struct tm *__result );

#endif // ifdef CYGIMP_LIBC_TIME_GMTIME_R_INLINE

///////////////////////////////////
// localtime_r() - POSIX.1 8.3.7 //
///////////////////////////////////
//
// This converts a time_t into a struct tm expressed in local time, and
// stores the result in the space occupied by __result
//

#ifdef CYGIMP_LIBC_TIME_LOCALTIME_R_INLINE

#include <sys/timeutil.h>        // for cyg_libc_time_normalize_structtm()

CYGPRI_LIBC_TIME_LOCALTIME_R_INLINE struct tm *
__localtime_r( const time_t *__timer, struct tm *__result )
{
    time_t __stdoffset, __dstoffset;
    CYG_REPORT_FUNCNAMETYPE("__localtime_r", "returning %08x");
    CYG_CHECK_DATA_PTR(__timer, "__timer is not a valid pointer!");
    CYG_CHECK_DATA_PTR(__result, "__result is not a valid pointer!");
    CYG_REPORT_FUNCARG2("*__timer=%d, __result is at %08x",
                        *__timer, __result);

    __gmtime_r(__timer, __result);

    // Adjust for STD/DST
    __result->tm_isdst = cyg_libc_time_getzoneoffsets(&__stdoffset,
                                                      &__dstoffset);

    if (__result->tm_isdst == 0) { // STD
        __result->tm_sec += __stdoffset;
        cyg_libc_time_normalize_structtm( __result );
    } // if
    else if (__result->tm_isdst > 0) { // DST
        __result->tm_sec += __dstoffset;
        cyg_libc_time_normalize_structtm( __result );
    } // if
    // Don't do anything for tm_isdst == -1

    CYG_REPORT_RETVAL(__result);

    return __result;
} // __localtime_r()

# ifdef CYGFUN_LIBC_TIME_POSIX
#  define localtime_r(__timer, __result) __localtime_r(__timer, __result)
# endif

#else

extern struct tm *
__localtime_r( const time_t *__timer, struct tm *__result );

#endif // ifdef CYGIMP_LIBC_TIME_LOCALTIME_R_INLINE

///////////////////////////////
// ctime_r() - POSIX.1 8.3.5 //
///////////////////////////////
//
// This returns the equivalent of ctime() but writes to __buf
// to store the returned string
//

#ifdef CYGIMP_LIBC_TIME_CTIME_R_INLINE

CYGPRI_LIBC_TIME_CTIME_R_INLINE char *
__ctime_r( const time_t *__timer, char *__buf )
{
    struct tm _mytm;

    CYG_REPORT_FUNCNAMETYPE("__ctime_r", "returning \"%s\"");

    CYG_CHECK_DATA_PTR(__timer, "__timer is not a valid pointer!");
    CYG_CHECK_DATA_PTR(__buf, "__buf is not a valid pointer!");

    CYG_REPORT_FUNCARG2("*__timer = %d, __buf=%08x", *__timer, __buf);

    __localtime_r( __timer, &_mytm );

    __asctime_r(&_mytm, __buf);

    CYG_REPORT_RETVAL(__buf);

    return __buf;
} // __ctime_r()

# ifdef CYGFUN_LIBC_TIME_POSIX
#  define ctime_r(__timer, __buf) __ctime_r(__timer, __buf)
# endif

#else

extern char *
__ctime_r( const time_t *__timer, char *__buf );

#endif // ifdef CYGIMP_LIBC_TIME_CTIME_R_INLINE

//===========================================================================
//
// ISO C functions

// Time manipulation functions - ISO C 7.12.2

/////////////////////////////////
// difftime() - ISO C 7.12.2.2 //
/////////////////////////////////
//
// This returns (__time1 - __time0) in seconds
//

#ifdef CYGIMP_LIBC_TIME_DIFFTIME_INLINE

CYGPRI_LIBC_TIME_DIFFTIME_INLINE double
__difftime( time_t __time1, time_t __time0 )
{
    double _ret;
    
    CYG_REPORT_FUNCNAMETYPE("__difftime", "returning %f");
    CYG_REPORT_FUNCARG2("__time1=%d, __time0=%d", __time1, __time0);

    _ret = (double)(__time1 - __time0);
    
    CYG_REPORT_RETVAL(_ret);

    return _ret;
} // __difftime()

# define difftime(__time1, __time0) __difftime(__time1, __time0)

#else

extern double
__difftime( time_t __time1, time_t __time0 );

#endif // ifdef CYGIMP_LIBC_TIME_DIFFTIME_INLINE

///////////////////////////////
// mktime() - ISO C 7.12.2.3 //
///////////////////////////////
//
// This converts a "struct tm" to a "time_t"
//

#ifdef CYGIMP_LIBC_TIME_MKTIME_INLINE

#include <sys/timeutil.h>        // for cyg_libc_time_normalize_structtm()
                                 // and cyg_libc_time_month_lengths

CYGPRI_LIBC_TIME_MKTIME_INLINE time_t
__mktime( struct tm *__timeptr )
{
    time_t _ret;
    cyg_count16 _i;
    cyg_count32 _daycount;
    cyg_bool _leap;

    CYG_REPORT_FUNCNAMETYPE("__mktime", "returning %d");
    CYG_REPORT_FUNCARG1( "__timeptr is at address %08x", __timeptr);

    CYG_CHECK_DATA_PTR(__timeptr, "__timeptr is not a valid pointer!");

    // First deal with STD/DST. If tm_isdst==-1 (the "autodetect" value)
    // we assume its already in UTC. FIXME: is this correct behaviour? Hmm....

#if 0
// FIXME: This doesn't seem to be the way to go
    if (__timeptr->tm_isdst == 0) { // STD
        // take _off_ the std offset to get us back to UTC from localtime
        __timeptr->tm_sec -= (int)cyg_libc_time_current_std_offset;
    } // if
    else if (__timeptr->tm_isdst > 0) { // DST
        // take _off_ the dst offset to get us back to UTC from localtime
        __timeptr->tm_sec -= (int)cyg_libc_time_current_dst_offset;
    } // if
#endif
    
    cyg_libc_time_normalize_structtm(__timeptr);

    // check if a time_t can hold the year. FIXME: we assume it is
    // 32 bits which gives the year range 1902 - 2038
    if ( (__timeptr->tm_year <= 2) || (__timeptr->tm_year >= 138) ) {
        CYG_REPORT_RETVAL(-1);
        return (time_t)-1;
    }

    // fill in the rest of the struct tm i.e. tm_wday and tm_yday
    
    _leap = cyg_libc_time_year_is_leap(1900 + __timeptr->tm_year);

    for (_i=0, _daycount=0; _i<12; ++_i) {
        if (_i == __timeptr->tm_mon) {
            _daycount += __timeptr->tm_mday - 1;
            break;
        } // if
        else {
            _daycount += cyg_libc_time_month_lengths[_leap][_i];
        } // else
    } // for

    CYG_ASSERT(_i<12, "Reached end of year. __timeptr->tm_mon must be bad");

    __timeptr->tm_yday = _daycount;
    
    // now tm_wday

    if (__timeptr->tm_year > 70) {
        for (_i=70; _i < __timeptr->tm_year; ++_i)
            _daycount += (cyg_libc_time_year_is_leap(1900 + _i) ? 366 : 365);
    } // if
    else if (__timeptr->tm_year < 70) {
        for (_i=70; _i > __timeptr->tm_year; --_i)
            _daycount -= (cyg_libc_time_year_is_leap(1900 + _i-1) ? 366 : 365);
    } // else if

    __timeptr->tm_wday = (_daycount + CYGNUM_LIBC_TIME_EPOCH_WDAY) % 7;

    // if _daycount was negative, on some targets the modulo operator will
    // return negative, so we adjust for that

    if (__timeptr->tm_wday < 0)
        __timeptr->tm_wday += 7;

    // now finally work out return value

    _ret = __timeptr->tm_sec + 60*__timeptr->tm_min + 60*60*__timeptr->tm_hour;
    _ret += _daycount*24*60*60;
    
    CYG_REPORT_RETVAL(_ret);

    return _ret;
} // __mktime()

# define mktime(__timeptr) __mktime(__timeptr)

#else

extern time_t
__mktime( struct tm *__timeptr );

#endif // ifdef CYGIMP_LIBC_TIME_MKTIME_INLINE

// Time conversion functions - ISO C 7.12.3

////////////////////////////////
// asctime() - ISO C 7.12.3.1 //
////////////////////////////////
//
// This returns a textual representation of a struct tm
//

#ifdef CYGIMP_LIBC_TIME_ASCTIME_INLINE

extern char cyg_libc_time_asctime_buf[];

CYGPRI_LIBC_TIME_ASCTIME_INLINE char *
__asctime( const struct tm *__timeptr )
{
    CYG_REPORT_FUNCNAMETYPE("__asctime", "returning \"%s\"");
    CYG_REPORT_FUNCARG1("__timeptr = %08x", __timeptr);

    // paranoia
    CYG_CHECK_DATA_PTR(__timeptr, "__timeptr is not a valid pointer!");

    (void)__asctime_r( __timeptr, cyg_libc_time_asctime_buf );

    CYG_REPORT_RETVAL(cyg_libc_time_asctime_buf);

    return cyg_libc_time_asctime_buf;
} // __asctime()

# define asctime(__timeptr) __asctime(__timeptr)

#else

extern char *
__asctime( const struct tm *__timeptr );

#endif // ifdef CYGIMP_LIBC_TIME_ASCTIME_INLINE

///////////////////////////////
// gmtime() - ISO C 7.12.3.3 //
///////////////////////////////
//
// This converts a time_t into a struct tm expressed in UTC
//

#ifdef CYGIMP_LIBC_TIME_GMTIME_INLINE

extern struct tm cyg_libc_time_gmtime_buf;

CYGPRI_LIBC_TIME_GMTIME_INLINE struct tm *
__gmtime( const time_t *__timer )
{
    CYG_REPORT_FUNCNAMETYPE("__gmtime", "returning %08x");
    CYG_CHECK_DATA_PTR(__timer, "__timer is not a valid pointer!");
    CYG_REPORT_FUNCARG1("*__timer=%d", *__timer);

    __gmtime_r(__timer, &cyg_libc_time_gmtime_buf);

    CYG_REPORT_RETVAL(&cyg_libc_time_gmtime_buf);

    return &cyg_libc_time_gmtime_buf;
} // __gmtime()

# define gmtime(__timer) __gmtime(__timer)

#else

extern struct tm *
__gmtime( const time_t *__timer);

#endif // ifdef CYGIMP_LIBC_TIME_GMTIME_INLINE

//////////////////////////////////
// localtime() - ISO C 7.12.3.4 //
//////////////////////////////////
//
// This converts a time_t into a struct tm expressed in local time
//

#ifdef CYGIMP_LIBC_TIME_LOCALTIME_INLINE

extern struct tm cyg_libc_time_localtime_buf;

CYGPRI_LIBC_TIME_LOCALTIME_INLINE struct tm *
__localtime( const time_t *__timer )
{
    CYG_REPORT_FUNCNAMETYPE("__localtime", "returning %08x");
    CYG_CHECK_DATA_PTR(__timer, "__timer is not a valid pointer!");
    CYG_REPORT_FUNCARG1("*__timer=%d", *__timer);

    __localtime_r(__timer, &cyg_libc_time_localtime_buf);

    CYG_REPORT_RETVAL(&cyg_libc_time_localtime_buf);

    return &cyg_libc_time_localtime_buf;
} // __localtime()

# define localtime(__timer) __localtime(__timer)

#else

extern struct tm *
__localtime( const time_t *__timer );

#endif // ifdef CYGIMP_LIBC_TIME_LOCALTIME_INLINE

//////////////////////////////
// ctime() - ISO C 7.12.3.2 //
//////////////////////////////
//
// This returns asctime(localtime(__timeptr))
//

#ifdef CYGIMP_LIBC_TIME_CTIME_INLINE

CYGPRI_LIBC_TIME_CTIME_INLINE char *
__ctime( const time_t *__timer )
{
    char *_str;

    CYG_REPORT_FUNCNAMETYPE("__ctime", "returning \"%s\"");
    CYG_CHECK_DATA_PTR( __timer, "__timer is not a valid pointer!");
    CYG_REPORT_FUNCARG1("*__timer = %d", *__timer);

    _str = __asctime(__localtime(__timer));

    CYG_REPORT_RETVAL(_str);

    return _str;
} // __ctime()

# define ctime(__timer) __ctime(__timer)

#else

extern char *
__ctime( const time_t *__timer );

#endif // ifdef CYGIMP_LIBC_TIME_CTIME_INLINE


#ifdef __cplusplus
} // extern "C"
#endif

#endif // CYGONCE_LIBC_TIME_INL multiple inclusion protection

// EOF time.inl