Glynn,
2007/11/25, Glynn Clements <[EMAIL PROTECTED]>:
> > I would like to add to the GIS library (strings.c) new fns
> > G_is_double(char *str) and G_is_int(char *str). Any objections?
>
> With what definition? E.g. does G_is_double() recognise numbers
> without a point? Does it use the locale's decimal separator or always
> a dot? Does G_is_int() recognise octal/hex? What about a leading "+"
> sign?
>
> Personally, I suggest leaving this to the modules. Otherwise,
> whichever syntax you choose, code well tend to use the library
> functions regardless of whether their syntax is appropriate for the
> specific purpose.
hm, I was thinking simply about
int G_is_double(char *str)
{
char *tail;
if (strtod (str, &tail),
tail == str || *tail != '\0') {
/* doesn't look like a number,
or has extra characters after what looks to be a number */
return 0;
}
return 1;
}
int G_is_int(char *str, int base)
{
char *tail;
if (strtol (str, &tail, base),
tail == str || *tail != '\0') {
/* doesn't look like a number,
or has extra characters after what looks to be a number */
return 0;
}
return 1;
}
Maybe doesn't make sense so much.
Martin
--
Martin Landa <[EMAIL PROTECTED]> * http://gama.fsv.cvut.cz/~landa *
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