Re: [xml] xmlChar to int conversion

[Nick Torenvliet <torenvliet ispnet ca>]

There isn't some xmlCharToInt type of function already in  libxml?

On Tue, 2003-04-08 at 16:25, Stefan Seefeld wrote:
> Nick Torenvliet wrote:
> > I guess at the same time I should ask how to get an int back to an
> > xmlChar.
> > 
> > On Tue, 2003-03-11 at 13:59, Nick Torenvliet wrote:
> > 
> >>Hi, I have a property of a tag and I need to convert it into an integer.
> >>
> >>I am really unfamiliar with UTF8 so I am not sure how to take something
> >>from an xmlChar * to an integer.  How can I succesfully complete the
> >>following?
> >>
> >>int i;
> >>i = xmlGetProp(cur,"val");
> > 
> 
> what do you mean by 'convert' ? Is the character actually a number in 
> the range [0,9] ? If that's what you want, you can do it like this:
> 
> int i;
> xmlChar *attr = xmlGetProp(cur, "val");
> if (*attr >= '0' && *attr <= '9') i = (int)*attr;
> 
> If you expect an ascii letter and want to map that to an int, you
> should test whether *attr really represents an ascii char, and then
> cast it. Otherwise the conversion won't work, since arbitrary utf8
> characters may be larger than an int can hold.
> 
> Oh, and if the attribute contains a *string* such as "42", you really
> have to parse it, one character at a time, using the above technique
> (i.e. to exclude non-ascii chars).
> 
> Regards,
> 		Stefan
> 
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-- 
Nick Torenvliet B.A.,B.Eng.
FieldStone Solutions
www.fieldstonesolutions.com