0005063: Unix module does not offer access to tzname

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Date Submitted

Last Update

0005063

OCaml

OCaml general

public

2010-05-28 18:47

2011-06-01 23:01

Reporter

dario

Assigned To

Priority

normal

Severity

feature

Reproducibility

N/A

Status

acknowledged

Resolution

open

Platform

OS Version

Product Version

3.11.2

Target Version

Fixed in Version

Summary

0005063: Unix module does not offer access to tzname

Description

The "Time Functions" in the Unix module provide comprehensive coverage of the time-related operations available in Libc. There is one conspicuous absence, however: the tzname variable, which provides access to the DST-adjusted abbreviated name of the current timezone. Presently, accessing this value from an Ocaml program requires writing a small C function.

Additional Information

The function 'sprint_timestamp' listed below returns a string with the given timestamp pretty-printed in a complete form, ie, including also the abbreviated timezone name adjusted for daylight-savings. It must be written in C, since the Unix module offers no access to the tzname variable.

CAMLprim value sprint_timestamp (value v_time)

        {
        CAMLparam1 (v_time);
        CAMLlocal1 (v_res);

        time_t time = Double_val (v_time);
        struct tm* lt = localtime (&time);
        char res [40];
        snprintf (res, sizeof (res), "%04d-%02d-%02d %02d:%02d:%02d (%s)",
                (lt->tm_year) + 1900, (lt->tm_mon) + 1, lt->tm_mday, lt->tm_hour, lt->tm_min, lt->tm_sec, tzname [lt->tm_isdst]);
        v_res = caml_copy_string (res);

        CAMLreturn (v_res);
        }

Issue History
Date Modified	Username	Field	Change
2010-05-28 18:47	dario	New Issue
2011-06-01 23:01	doligez	Status	new => acknowledged

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