llliiibbbtttwwwsss(((333)))          UUUNNNIIIXXX 555...000 (((000888 NNNooovvveeemmmbbbeeerrr 111999888666)))          llliiibbbtttwwwsss(((333)))     NNNAAAMMMEEE          libtws - alternate date and time routines including parsing     SSSYYYNNNOOOPPPSSSIIISSS          include "tws.h"          struct tws *dlocaltime( clock );   /* local clock into tws */          long *clock;          struct tws *gmtime( clock );       /* GMT clock into tws */          long *clock;          char *dtime( clock );              /* clock into string */          long *clock;          long twclock( t );                 /* tws into clock */          struct tws *t;          long twjuliandate( t );            /* tws into Julian day number */          struct tws *t;          struct tws *dparsetime( str );     /* string into tws */          char *str;          char *dctime( t );                 /* tws into string */          struct tws *t;          char *dasctime( t, flags );        /* tws into string */          struct tws *t;          int flags;          char *dtimezone( offset, flags );  /* timezone into string */          int offset, flags;          char *dtwszone( t );               /* tws's timezone into string */          struct tws *t;          char *dtimemow( );                 /* current time into string */          struct tws *dtwstime( );           /* current time into tws */          void twscopy( tot, fromt );        /* copy a tws */          struct tws *tot, *fromt;          int twsort( t1, t2 );              /* compare two tws's */          struct tws *t1, *t2;          long twsubtract( t1, t2 );         /* seconds between t2 and t1 */          struct tws *t1, *t2;     DDDEEESSSCCCRRRIIIPPPTTTIIIOOONNN          _L_i_b_t_w_s is a fairly complete date/time library.  Unlike the     Page 1                                           (printed 8/1/88)     llliiibbbtttwwwsss(((333)))          UUUNNNIIIXXX 555...000 (((000888 NNNooovvveeemmmbbbeeerrr 111999888666)))          llliiibbbtttwwwsss(((333)))          standard Unix* date/time routines, _l_i_b_t_w_s will parse          date/time strings into internal form.  The format for          specifying date/time strings is pretty loose - basically the          same as the format for date/times in network mail.          Most of the routines do not use the Unix* "clock" time          format, and therefore are not limited to dates after 01          January 1970.  In particular, twsubtract() lets you subtract          two dates without converting them to "clock" form.     SSSEEEEEE AAALLLSSSOOO          _c_t_i_m_e(_3), _t_i_m_e(_3)     AAAUUUTTTHHHOOORRR          Most of _l_i_b_t_w_s came from version 6.5 of the MH message          handling system, courtesy of Marshall Rose.  Some          improvements (?) were added by Jef Poskanzer.     BBBUUUGGGSSS          The return values point to static data whose contents are          overwritten by the next call.          The basic Unix* time format (clock) only goes back to 1970,          limiting applications somewhat.     NNNOOOTTTEEE          * Unix is a virus from outer space.     Page 2                                           (printed 8/1/88)