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From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: A few questions
Date: Tue, 3 Nov 2015 00:25:05 -0600
Organization: JSA Research & Innovation
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Date: 2015-11-03T00:25:05-06:00
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"Jeffrey R. Carter" <spam.jrcarter.not@spam.not.acm.org> wrote in message 
news:n13m1a$p3c$1@dont-email.me...
> On 10/31/2015 01:29 PM, Laurent wrote:
>>
>> I need a range of Dates.
>>
>> So is there an existing package which generates a range of Dates from .. 
>> to
>> ?
>>
>> PS: need this range of dates because the log files I want to read and 
>> extract
>> informations from are all named like this: vba-yyyymmdd.log where 
>> obviously
>> yyyymmdd is the date. The program generates a new file every date an 
>> stores
>> the communication it treated in it.
>>
>> I want to read this files and extract the messages which passed. Is more 
>> an
>> exercise than actually a need to do it.
>
> I'm not aware of any such pkg. On the other hand, I'm not sure you need 
> it. Do
> you really need to store all the dates in the range? You could process the 
> file
> for date D, then the file for date D + 1, ..., until you have processed 
> all the
> desired files.
>
> Conceptually the idea of an operation
>
> function "+" (Left : in Dates.Object; Right : in Integer) return 
> Dates.Object;
>
> makes sense; without knowing the details of the implementation of 
> Dates.Object I
> have no idea how easy it would be. For Ada.Calendar.Time, one would simply 
> add
> Right * Ada.Calendar.Day_Duration'Last.

Or easier still, just use Ada.Calendar.Arithmetic, which has operations for 
adding numbers of days to a Ada.Calendar.Time (added in Ada 2005). (This is 
hard to do in Ada 95 if you need to add more than one day at a time.)

                                         Randy.