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computers / comp.os.vms / Re: Name shortening in C

SubjectAuthor
* Name shortening in CJoukj
+- Re: Name shortening in Chb
`* Re: Name shortening in CCraig A. Berry
 +- Re: Name shortening in CJoukj
 `- Re: Name shortening in CJoukj

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Name shortening in C

<sj4fof$v0j$1@gioia.aioe.org>

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From: jou...@hrem.nano.tudelft.nl (Joukj)
Newsgroups: comp.os.vms
Subject: Name shortening in C
Date: Thu, 30 Sep 2021 15:57:33 +0200
Organization: Aioe.org NNTP Server
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 by: Joukj - Thu, 30 Sep 2021 13:57 UTC

Hi all,

when I use the option /name=short when compiling C-code long names are
mangled in a 32-character string. All is documented in the
CXX$DEMANGLER_DB. files.
I would like to create a routine that I can feed with a string and which
gives the shortened string as output, without needing to (inefficiently)
read all the CXX$DEMANGLER_DB. files.

The question is : is the algorithm which is used documented/available?

Regards
Jouk

Re: Name shortening in C

<sj4isi$h1j$1@gioia.aioe.org>

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From: end...@inter.net (hb)
Newsgroups: comp.os.vms
Subject: Re: Name shortening in C
Date: Thu, 30 Sep 2021 16:50:58 +0200
Organization: Aioe.org NNTP Server
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 by: hb - Thu, 30 Sep 2021 14:50 UTC

On 9/30/21 3:57 PM, Joukj wrote:
> Hi all,
>
> when I use the option /name=short when compiling C-code long names are
> mangled in a 32-character string. All is documented in the
> CXX$DEMANGLER_DB. files.
> I would like to create a routine that I can feed with a string and which
> gives the shortened string as output, without needing to (inefficiently)
> read all the  CXX$DEMANGLER_DB. files.
>
> The question is : is the algorithm which is used documented/available?
>
>
>           Regards
>               Jouk
It's documented, try "$ help cc /names":

A shortened name consists of the first 23 characters of the
name followed by a 7-character Cyclic Redundancy Check (CRC)
computed by looking at the full name, and then a "$".
....

Re: Name shortening in C

<sj4nsk$llb$1@dont-email.me>

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From: craigbe...@nospam.mac.com (Craig A. Berry)
Newsgroups: comp.os.vms
Subject: Re: Name shortening in C
Date: Thu, 30 Sep 2021 11:16:18 -0500
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 by: Craig A. Berry - Thu, 30 Sep 2021 16:16 UTC

On 9/30/21 8:57 AM, Joukj wrote:
> Hi all,
>
> when I use the option /name=short when compiling C-code long names are
> mangled in a 32-character string. All is documented in the
> CXX$DEMANGLER_DB. files.
> I would like to create a routine that I can feed with a string and which
> gives the shortened string as output, without needing to (inefficiently)
> read all the  CXX$DEMANGLER_DB. files.
>
> The question is : is the algorithm which is used documented/available?

I've got implementations in C and Perl here:

https://sourceforge.net/p/vms-ports/vmsshortsym/ci/default/tree/

Re: Name shortening in C

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From: jou...@hrem.nano.tudelft.nl (Joukj)
Newsgroups: comp.os.vms
Subject: Re: Name shortening in C
Date: Fri, 01 Oct 2021 08:24:26 +0200
Organization: Aioe.org NNTP Server
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 by: Joukj - Fri, 1 Oct 2021 06:24 UTC

Craig A. Berry wrote:
> On 9/30/21 8:57 AM, Joukj wrote:
>> Hi all,
>>
>> when I use the option /name=short when compiling C-code long names are
>> mangled in a 32-character string. All is documented in the
>> CXX$DEMANGLER_DB. files.
>> I would like to create a routine that I can feed with a string and
>> which gives the shortened string as output, without needing to
>> (inefficiently) read all the CXX$DEMANGLER_DB. files.
>>
>> The question is : is the algorithm which is used documented/available?
>
> I've got implementations in C and Perl here:
>
> https://sourceforge.net/p/vms-ports/vmsshortsym/ci/default/tree/
Thanks,

I'll check it out

Jouk

Re: Name shortening in C

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From: jou...@hrem.nano.tudelft.nl (Joukj)
Newsgroups: comp.os.vms
Subject: Re: Name shortening in C
Date: Mon, 04 Oct 2021 11:53:13 +0200
Organization: Aioe.org NNTP Server
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 by: Joukj - Mon, 4 Oct 2021 09:53 UTC

Craig A. Berry wrote:
> On 9/30/21 8:57 AM, Joukj wrote:
>> Hi all,
>>
>> when I use the option /name=short when compiling C-code long names are
>> mangled in a 32-character string. All is documented in the
>> CXX$DEMANGLER_DB. files.
>> I would like to create a routine that I can feed with a string and
>> which gives the shortened string as output, without needing to
>> (inefficiently) read all the CXX$DEMANGLER_DB. files.
>>
>> The question is : is the algorithm which is used documented/available?
>
> I've got implementations in C and Perl here:
>
> https://sourceforge.net/p/vms-ports/vmsshortsym/ci/default/tree/

The C-version worked fine for me. A version with only the main-program
#ifdef'd out will be inserted in the Freetype package.
(They designed a method to create an .opt file for creating a shareable
image from the C-header files. You need a proper shertening for "long"
names in that case)

Thanks again Craig

Jouk

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