[PATCH] gethex doesn't cope with multibyte decimalpoints

Corinna Vinschen vinschen@redhat.com
Fri Feb 6 19:32:00 GMT 2009

On Feb  6 12:31, Howland Craig D (Craig) wrote:
> A question related to the decimal point search, new method:
> +	while (s0 < s1) {
> +		if (!strncmp ((char *) s0, (char *) decimalpoint,
> dplen)) {
> +			s0 += dplen;
> This appears to assume that the decimal is either a single normal or
> multi-byte character--as opposed to the original code which assumed that
> it was a single byte (plain char).  (It also assumes that if it is mb,

Well, sure.  Isn't that what I wrote in my OP?  Treating decimalpoint
as singlebyte char is not working in multibyte charsets.  That's the
whole reason for my patch.

> So perhaps should it be the following instead?
> +	while (s0 < s1) {
> +		if (!strncmp ((char *) s0, (char *) decimalpoint,
> dplen)) {
> +			s0++;
> (That is, step through 1 byte at a time instead of by dlen at a time?)

That's incorrect.  If decimalpoint is some multibyte char you will hit
the next followup byte of the MB char in the next iteration.  It will be
incorrectly converted to a hex digit.  If you recognize a certain MB
char, you must skip it entirely.


Corinna Vinschen
Cygwin Project Co-Leader
Red Hat

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