* Re: "cat -v" in zsh (and a minor bug)
[not found] <990925184831.ZM30850@candle.brasslantern.com>
@ 1999-09-26 14:31 ` Peter Stephenson
1999-09-26 20:15 ` Bart Schaefer
0 siblings, 1 reply; 2+ messages in thread
From: Peter Stephenson @ 1999-09-26 14:31 UTC (permalink / raw)
To: zsh-workers
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"Bart Schaefer" wrote:
> The bug is demonstrated by:
>
> a='å' # That's meta-a, or 228 decimal
> (( #a == #\å )) || echo oops
Seems to be 229, here.
Here's a function that allows you to enter a numeric argument to get a
character with a given number, sort of like quoted insert. Have I missed
something simpler (i.e. can you really not process a character code in
decimal)?
# Insert the ASCII character given by the numeric argument (0 -- 255)
typeset -i 16 x
x=${NUMERIC:-0}
if (( x < 0 || x > 255 )); then
return 1
else
eval LBUFFER=\$LBUFFER\$\'\\x${x##???}\'
fi
> The problem is that #a is unsigned but #\a is signed, so for values above
> 127 decimal the #\a form returns a negative number.
(except when it isn't, of course). The problem looks like it's in
getkeystring(), which converts a char to an int by direct casting instead
of taking the usual care with STOUC(). I can't imagine getkeystring() has
to be different from the rest of the shell in this respect.
--- Src/utils.c.stouc Sun Sep 26 15:32:08 1999
+++ Src/utils.c Sun Sep 26 16:20:07 1999
@@ -3407,7 +3407,7 @@
t++;
}
if (fromwhere == 6 && t != tmp) {
- *misc = (int) tmp[0];
+ *misc = STOUC(tmp[0]);
return s + 1;
}
}
--
Peter Stephenson <pws@ibmth.df.unipi.it> Tel: +39 050 844536
WWW: http://www.ifh.de/~pws/
Dipartimento di Fisica, Via Buonarroti 2, 56127 Pisa, Italy
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