Groups > microsoft.public.scripting.vbscript > #12467

Re: Using CHRW to speed up writing binary files

From	"Mayayana" <mayayana@invalid.nospam>
Newsgroups	microsoft.public.scripting.vbscript
Subject	Re: Using CHRW to speed up writing binary files
Date	2022-10-10 08:06 -0400
Organization	A noiseless patient Spider
Message-ID	<ti11tl$q7v4$1@dont-email.me> (permalink)
References	<661f1763-6f55-44ce-8360-ca5f9f99aeb5n@googlegroups.com>

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"Antoni Gual Via" <antonigualvia@gmail.com> wrote

> Hello. I'm experimenting on creating bmp files in VBScript

https://www.jsware.net/jsware/scrfiles.php5#bints

  No ADODB needed. Straight Textstream. The only limitation
is that it won't work on DBCS systems. (Japanese, Chinese,
Korean.) It requires a true ANSI read/write: 1 byte = 1 character.

  If you start getting into writing two bytes at a time you
open yourself up to endless complications. The whole point
of a binary file is that it's a byte stream. So any edit that's
not an even number of bytes would corrupt your file. It
might be OK for BMPs, with their simple header and their
even-numbered grid lines, but once you try to touch anything
else you'll likely be in trouble.

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Thread

Using CHRW to speed up writing binary files Antoni Gual Via <antonigualvia@gmail.com> - 2022-10-08 09:45 -0700
  Re: Using CHRW to speed up writing binary files Antoni Gual Via <antonigualvia@gmail.com> - 2022-10-08 12:19 -0700
    Re: Using CHRW to speed up writing binary files JJ <jj4public@outlook.com> - 2022-10-09 20:26 +0700
  Re: Using CHRW to speed up writing binary files "Mayayana" <mayayana@invalid.nospam> - 2022-10-10 08:06 -0400
    Re: Using CHRW to speed up writing binary files Antoni Gual Via <antonigualvia@gmail.com> - 2022-10-10 08:23 -0700
      Re: Using CHRW to speed up writing binary files "Mayayana" <mayayana@invalid.nospam> - 2022-10-10 17:40 -0400

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