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1 .TH libtws 3 "08 November 1986"
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2 .SH NAME
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3 libtws \- alternate date and time routines including parsing
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4 .SH SYNOPSIS
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5 .nf
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6 .fc ^ ~
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7 .ta \w'char *dtimezone( offset, flags ); 'u
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8 include "tws.h"
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9 .PP
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10 ^struct tws *dlocaltime( clock );~^/* local clock into tws */
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11 long *clock;
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12 .PP
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13 ^struct tws *gmtime( clock );~^/* GMT clock into tws */
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14 long *clock;
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15 .PP
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16 ^char *dtime( clock );~^/* clock into string */
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17 long *clock;
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18 .PP
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19 ^long twclock( t );~^/* tws into clock */
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20 struct tws *t;
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21 .PP
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22 ^long twjuliandate( t );~^/* tws into Julian day number */
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23 struct tws *t;
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24 .PP
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25 ^struct tws *dparsetime( str );~^/* string into tws */
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26 char *str;
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27 .PP
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28 ^char *dctime( t );~^/* tws into string */
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29 struct tws *t;
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30 .PP
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31 ^char *dasctime( t, flags );~^/* tws into string */
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32 struct tws *t;
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33 int flags;
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34 .PP
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35 ^char *dtimezone( offset, flags );~^/* timezone into string */
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36 int offset, flags;
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37 .PP
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38 ^char *dtwszone( t );~^/* tws's timezone into string */
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39 struct tws *t;
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40 .PP
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41 ^char *dtimemow( );~^/* current time into string */
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42 .PP
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43 ^struct tws *dtwstime( );~^/* current time into tws */
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44 .PP
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45 ^void twscopy( tot, fromt );~^/* copy a tws */
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46 struct tws *tot, *fromt;
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47 .PP
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48 ^int twsort( t1, t2 );~^/* compare two tws's */
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49 struct tws *t1, *t2;
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50 .PP
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51 ^long twsubtract( t1, t2 );~^/* seconds between t2 and t1 */
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52 struct tws *t1, *t2;
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53 .fi
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54 .SH DESCRIPTION
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55 .I Libtws
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56 is a fairly complete date/time library.
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57 Unlike the standard Unix date/time routines,
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58 .I libtws
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59 will parse date/time strings into internal form.
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60 The format for specifying date/time strings is pretty loose - basically
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61 the same as the format for date/times in network mail.
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62 .PP
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63 Most of the routines do not use the Unix(R) "clock" time
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64 format, and therefore are not limited to dates after 01 January 1970.
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65 In particular, twsubtract() lets you subtract two dates without
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66 converting them to "clock" form.
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67 .SH "SEE\ ALSO"
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68 .IR ctime(3),
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69 .IR time(3)
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70 .SH AUTHOR
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71 Most of
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72 .I libtws
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73 came from version 6.5 of the MH message
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74 handling system, courtesy of Marshall Rose.
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75 Some improvements (?) were added by Jef Poskanzer.
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76 .SH BUGS
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77 The return values point to static data whose contents are overwritten
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78 by the next call.
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79 .PP
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80 The basic Unix time format (clock) only goes back to 1970, limiting
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81 applications somewhat.
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