[Mingw-notify] [ mingw-Bugs-899213 ] strtoul

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Bugs item #899213, was opened at 2004-02-18 00:01
Message generated for change (Comment added) made by darrinf
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=102435&aid=899213&group_id=2435

Category: mingw runtime
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Darrin Forelle (darrinf)
Assigned to: Danny Smith (dannysmith)
Summary: strtoul

Initial Comment:
1.c:
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
//include: stdio.h, stdlib.h, errno.h

int main(int argc, char *argv[]){
 unsigned long number = strtoul(argv[1], 0, 10);

 if (errno)
 {
  perror("Incorrect integer value");
  return 1;
 }

 printf("number = %lu\n", number);
 return 0;
}

gcc 1.c -o 1.exe & 1 abc
number = 0

Function strtoul doesn't set errno if the conversion can 
not be performed.

Tested with gcc v3.3.1 (mingw special 20030804-1).

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>Comment By: Darrin Forelle (darrinf)
Date: 2004-02-18 01:55

Message:
Logged In: YES 
user_id=760771

I'm sorry for the false report. This is an erratum in my C book. 
According to the C standard the behaviour is correct.

----------------------------------------------------------------------

Comment By: Luke Dunstan (infidel)
Date: 2004-02-18 01:33

Message:
Logged In: YES 
user_id=30442

According to the MSDN documentation this is how it is 
supposed to work. It says that errno is set only if an 
underflow or overflow occurs, and in a real program you can 
use endptr (arg 2) to distinguish between an invalid number 
and a valid zero value.


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