LAE

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Originally posted by: deepak

How TAP files can be read using LDR

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Originally posted by: rboccuzzi

Can you give us an example of a TAP file? Is there a spec for it?

Some formats have specs that are not complete enough on their own; there are other factors to consider. Think of a COBOL copybook specified file, which has a detailed spec, but you need to understand other things about it as well, like endian, padding, etc. Other formats regularly violate their spec, or have many places to put data, depending on the source of the data file, such as CABS.

The more information you can provide us, the more examples, the more we can help.

Cheers
Rich

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Originally posted by: Tim Meagher

Hi,

As Rich points out, in order to provide any assistance we'd first need a specification. You only provided a sample data file.
If you can point to a specification - which defines the file format, then we can probably help.

Tim.

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Originally posted by: deepak

I also tried to upload spec doc but due to size restriction I couldn't attach. (spec doc size is 4.7 MB after compression)

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Originally posted by: Tim Meagher

Interesting ... that's a very large spec then.

I've sent you a PM with my email details - can you email that through & I can take a look.

Tim.

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Originally posted by: deepak

Provided Spec over mai.

Originally posted by: Tim Meagher
					

Interesting ... that's a very large spec then.


I've sent you a PM with my email details - can you email that through & I can take a look.


Tim.
			

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Originally posted by: Tim Meagher

Hi,

Sorry for the delay.
I've looked into this format and while I've found it is a simple process to construct a reader for this using the development version of LDR 2.1 I am currently working on, I am having a couple of issues with LDR 2.0.1 (which was released with LAE 4.5.2).

I know that we have previously constructed readers for this file format against LDR 2.0.1, however, so I will look into this some more & provide you with additional information if you can't get this working. It could just be that my workspace is a bit messed up with multiple versions of everything piled on top of each other and that's why I'm having difficulty.

In any case, I thought this was a good opportunity to put together some walkthrough documentation on how to construct LDR readers for ASN.1 data in general (using this format as an example). Therefore, I've written this up into a word document that I've attached.

The document is a bit lengthy - mostly because I've tried to explain the process in terms of why things need to be done at various stages, and included a bunch of DRIX/DROX & asn1 snippets.

Regards,
Tim.
Attachments:
Setting up an LDR ASN1 Reader.zip