From: hanslad@gmail.com
Subject: Re: Help with type definition
Date: Fri, 27 Jun 2014 15:05:30 -0700 (PDT)
Date: 2014-06-27T15:05:30-07:00 [thread overview]
Message-ID: <5b4a031b-b3b3-455f-b491-e161cc24af3d@googlegroups.com> (raw)
In-Reply-To: <8beec1c1-9ca2-44fc-9d7e-0cd0aa772dcc@googlegroups.com>
Hello again,
I still need some help with type definition in my program.
The specification of the protocol I try to implement the identifier type could be a byte string with similar specification as the string identifier type.
Is there a type in Ada for unbounded byte arrays similar to the unbounded string?
Belowis an excerpt from the protocol specification of how the bytestring is presented on the wire:
"A ByteString is encoded as sequence of bytes preceded by its length in bytes. The length is encoded as a 32-bit signed integer as described above.
If the length of the byte string is -1 then the byte string is 'null'."
I got a new version of my code:
package Types is
package SU renames Ada.Strings.Unbounded;
type StringIdentifier is new SU.Unbounded_String;
type ByteStringIdentifier is new ??;
type IdentifierType is
(
Identifier_Numeric,
Identifier_String,
Identifier_Bytestring
);
for IdentifierType use
(Identifier_Numeric => 1,
Identifier_String => 2,
Identifier_ByteString => 3,);
for IdentifierType'Size use 8;
type Node_Id (IdType : IdentifierType := IdentifierType_Numeric )is record
NamespaceIndex : Interfaces.Unsigned_16 := 0;
case IdType is
when Identifier_Numeric =>
Numeric : Interfaces.Unsigned_32 ;
when Identifier_String =>
String : StringIdentifier;
when Identifier_String =>
ByteString : ByteStringIdentifier;
end case;
end record;
end Types;
Thanks
HP
next prev parent reply other threads:[~2014-06-27 22:05 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-16 7:37 Help with type definition hanslad
2014-05-16 7:54 ` Dmitry A. Kazakov
2014-05-16 10:03 ` G.B.
2014-05-16 11:26 ` Jacob Sparre Andersen
2014-05-16 15:38 ` Shark8
2014-05-16 15:50 ` Simon Wright
2014-05-16 16:30 ` Shark8
2014-05-16 11:29 ` Jacob Sparre Andersen
2014-05-16 12:29 ` G.B.
2014-05-16 17:57 ` Jeffrey Carter
2014-05-21 20:45 ` hanslad
2014-06-27 22:05 ` hanslad [this message]
2014-06-28 7:26 ` Shark8
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