.TH caldate 3
.SH NAME
caldate \- calendar dates
.SH SYNTAX
.B #include <caldate.h>

unsigned int \fBcaldate_fmt\fP(\fIs\fR,&\fIcd\fR);
.br
unsigned int \fBcaldate_scan\fP(\fIs\fR,&\fIcd\fR);

struct caldate \fIcd\fR;
.br
char *\fIs\fR;
.SH DESCRIPTION
A
.B struct caldate
value is a calendar date.
It has three components:
.BR year ,
.B month
(1...12),
and
.B day
(1...31).

.B caldate_fmt
prints
.I cd
in ISO style (yyyy-mm-dd)
into the character buffer
.IR s ,
without a terminating NUL.
It returns the number of characters printed.
.I s
may be zero;
then
.B caldate_fmt
returns the number of characters that would have been printed.

.B caldate_scan
reads a calendar date in ISO style
from the beginning of the character buffer
.I s
and puts it into
.IR cd .
It returns the number of characters read.
If
.I s
does not start with an ISO-style date,
.B caldate_scan
returns 0.
.SH "SEE ALSO"
caldate_mjd(3),
caltime(3)