From: Stephen Leake <stephen.a.leake.1@gsfc.nasa.gov>
Subject: Re: Conversion to UNIX time
Date: 2000/07/19
Date: 2000-07-19T20:22:36+00:00 [thread overview]
Message-ID: <u4s5lop1z.fsf@gsfc.nasa.gov> (raw)
In-Reply-To: 20000719014423.05992.00000168@ng-fz1.aol.com
tennisbb@aol.com (Tennisbb) writes:
> My project has decided to name recording files (of which there will probably be
> MANY) by a number of fields, the first two of which will be Start Time and End
> Time in 8-digit Hex UNIX time. Despite our wide use of re-use, I can't locate
> any routines to convert Calendar Time to an 8-digit Hex string, and wondered if
> anyone has any procedures they'd be willing to share... The reason for the Hex
> times is to reduce the search time later.
Below is code to produce hex strings from unsigned integers. If you
can convert time to an unsigned integer, you're all set.
--
-- Stephe
-- Abstract:
--
-- Generic plain Hexadecimal image
--
generic
Width : Natural;
type Number_Type is mod <>;
function Sal.Generic_Hex_Image (Item : in Number_Type) return String;
-- Return a hexadecimal image of Item, padded with leading zeros to Width.
-- If Width is too small for Item, leading digits are silently truncated.
-- Abstract:
--
-- see spec
--
function Sal.Generic_Hex_Image (Item : in Number_Type) return String
is
Temp : Number_Type := Item;
Nibble : Number_Type;
Image : String (1 .. Width);
begin
for I in reverse Image'Range loop
Nibble := Temp mod 16;
Temp := Temp / 16;
if Nibble > 9 then
Image (I) := Character'Val (Character'Pos ('A') + Nibble - 10);
else
Image (I) := Character'Val (Character'Pos ('0') + Nibble);
end if;
end loop;
return Image;
end Sal.Generic_Hex_Image;
next prev parent reply other threads:[~2000-07-19 0:00 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-07-19 0:00 Conversion to UNIX time Tennisbb
2000-07-19 0:00 ` Stephen Leake [this message]
2000-07-20 0:00 ` tmoran
2000-07-20 0:00 ` Keith Thompson
2000-07-28 0:00 ` Robert I. Eachus
2000-07-27 0:00 ` Keith Thompson
replies disabled
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox