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From: =?UTF-8?Q?Arne_Vajh=C3=B8j?= <arne@vajhoej.dk>
Newsgroups: comp.os.vms
Subject: Re: Clair Grant on VMS code base
Date: Tue, 8 Apr 2025 08:29:15 -0400
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On 4/8/2025 8:20 AM, Simon Clubley wrote:
> On 2025-04-06, Arne Vajhøj <arne@vajhoej.dk> wrote:
>> On 4/4/2025 2:00 PM, Simon Clubley wrote:
>>> The problem with that analysis is what DCL does.
>>>
>>> It basically parses, validates, and executes commands it has been given.
>>> That is something which can be implemented a lot more easily and concisely
>>> in a HLL with abstracted data structure capabilities (which includes
>>> even C) than an assembly language with no such capabilities.
>>
>> It is not obvious to me that:
>>
>> (LOC/FP for Macro-32) / (LOC/FP for C)
>>
>> is a lot higher for a shell than for the average application - data
>> structures are not anything special for shells.
>>
>> But maybe.
> 
> It's a lot more complicated than that.
> 
> For example, take a LL(1) RD parser. Even ignoring the processing
> of the results from the parser, how much code (and how much effort)
> do you think it would take to implement it in Macro-32 compared to C ?

Still not obvious to me that it would not follow normal LOC/FP
ratios.

Effort is a different issue. If someone said:

x1.6 LOC
x16 hours for initial write of code
x160 hours for maintenance of code

then I would consider it likely.

It has been hinted a few time that the DCL code is not easy to
understand and modify.

Arne