* Constructing and Manipulating Raw Strings
@ 2010-10-13 12:13 Nordlöw
2010-10-13 15:53 ` Pascal J. Bourguignon
0 siblings, 1 reply; 3+ messages in thread
From: Nordlöw @ 2010-10-13 12:13 UTC (permalink / raw)
To: help-gnu-emacs
What is the best way to extract the individual bytes from hexadecimal
string (output from md5) and using them as input into a call to
unibyte-string()?
I want to use this raw string as a key in a hash table for file types
and then I don't want to waste space (size halves if we go from a
hexadecimal string to a raw byte string).
Does read() (or some of its variants) support reading raw unibyte
strings (that may contain zero bytes).
Thanks in advance,
Per Nordlöw
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Constructing and Manipulating Raw Strings
2010-10-13 12:13 Constructing and Manipulating Raw Strings Nordlöw
@ 2010-10-13 15:53 ` Pascal J. Bourguignon
2010-10-13 17:23 ` Nordlöw
0 siblings, 1 reply; 3+ messages in thread
From: Pascal J. Bourguignon @ 2010-10-13 15:53 UTC (permalink / raw)
To: help-gnu-emacs
Nordlöw <per.nordlow@gmail.com> writes:
> What is the best way to extract the individual bytes from hexadecimal
> string (output from md5) and using them as input into a call to
> unibyte-string()?
>
> I want to use this raw string as a key in a hash table for file types
> and then I don't want to waste space (size halves if we go from a
> hexadecimal string to a raw byte string).
>
> Does read() (or some of its variants) support reading raw unibyte
> strings (that may contain zero bytes).
You can use decode-hex-string instead:
(decode-hex-string "4142434445464748494a4b4c4d4e4f")
--> "ABCDEFGHIJKLMNO"
--
__Pascal Bourguignon__ http://www.informatimago.com/
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Constructing and Manipulating Raw Strings
2010-10-13 15:53 ` Pascal J. Bourguignon
@ 2010-10-13 17:23 ` Nordlöw
0 siblings, 0 replies; 3+ messages in thread
From: Nordlöw @ 2010-10-13 17:23 UTC (permalink / raw)
To: help-gnu-emacs
On 13 Okt, 17:53, p...@informatimago.com (Pascal J. Bourguignon)
wrote:
> Nordlöw <per.nord...@gmail.com> writes:
> > What is the best way to extract the individual bytes from hexadecimal
> > string (output from md5) and using them as input into a call to
> > unibyte-string()?
>
> > I want to use this raw string as a key in a hash table for file types
> > and then I don't want to waste space (size halves if we go from a
> > hexadecimal string to a raw byte string).
>
> > Does read() (or some of its variants) support reading raw unibyte
> > strings (that may contain zero bytes).
>
> You can use decode-hex-string instead:
>
> (decode-hex-string "4142434445464748494a4b4c4d4e4f")
> --> "ABCDEFGHIJKLMNO"
>
> --
> __Pascal Bourguignon__ http://www.informatimago.com/
Thanks,
Per
^ permalink raw reply [flat|nested] 3+ messages in thread
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2010-10-13 17:23 ` Nordlöw
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