RE: strtod() and errno question.

["James Stevenson" <james@stev.org>]

Hi,

Try taking a copy of errno before calling fprintf.
See if that helps any.

	James

> -----Original Message-----
> From: linux-c-programming-owner@vger.kernel.org [mailto:linux-c-
> programming-owner@vger.kernel.org] On Behalf Of J.
> Sent: 10 January 2006 21:43
> To: linux-c-programming@vger.kernel.org
> Subject: strtod() and errno question.
> 
> Tuesday, January 10 22:35:50
> 
> Hi people,
> 
> I have a question regarding errno and strtod() error checking. I have a
> function [listed below] that extracts a number from a string. In case of
> an error, strerror() in conjunction with errno is used to display a user
> friendly error message. However on a strtod() error; `Success' is
> returned.
> 
> Error - strtod(ca4)`c': Success
> 
> Since I am a bit confused by the strtod() manual page, what would be the
> correct way to handle this ?
> 
> Thankx !
> 
> J.
> 
> int extrnumber(char *str) {
>  int retv = 0;
>  char *nptr = NULL;
> 
>  retv = strtod(str, &nptr);
>  if(retv == 0 && nptr != NULL) {
>   fprintf(stderr, "%s: Error - strtod(%s)`%c': %s\n", PACKAGE,
>     str, *nptr, strerror(errno));
>   exit(EXIT_FAILURE);
>  }
> 
>  return retv;
> }
> 
> -
> To unsubscribe from this list: send the line "unsubscribe linux-c-
> programming" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html