[Bug libc/15973] New: glibc should provide strnspn() and strncspn()

[Bug libc/15973] New: glibc should provide strnspn() and strncspn()

[ooprala at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=15973

            Bug ID: 15973
           Summary: glibc should provide strnspn() and strncspn()
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: ooprala at redhat dot com
                CC: drepper.fsp at gmail dot com

Strspn should have an 'n'-variant similar to its string-handling siblings.

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[Bug libc/15973] glibc should provide strnspn() and strncspn()

[ooprala at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=15973

Ondrej Oprala <ooprala at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ooprala at redhat dot com

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Re: [Bug libc/15973] New: glibc should provide strnspn() and strncspn()

[Ondřej Bílka]

On Sat, Sep 21, 2013 at 05:19:17PM +0000, ooprala at redhat dot com wrote:
> 
> Strspn should have an 'n'-variant similar to its string-handling siblings.
> 
What are use cases where it is needed?

[Bug libc/15973] glibc should provide strnspn() and strncspn()

[neleai at seznam dot cz]

http://sourceware.org/bugzilla/show_bug.cgi?id=15973

--- Comment #1 from Ondrej Bilka <neleai at seznam dot cz> ---
On Sat, Sep 21, 2013 at 05:19:17PM +0000, ooprala at redhat dot com wrote:
> 
> Strspn should have an 'n'-variant similar to its string-handling siblings.
> 
What are use cases where it is needed?

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[Bug libc/15973] glibc should provide strnspn() and strncspn()

[bugdal at aerifal dot cx]

https://sourceware.org/bugzilla/show_bug.cgi?id=15973

Rich Felker <bugdal at aerifal dot cx> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bugdal at aerifal dot cx

--- Comment #2 from Rich Felker <bugdal at aerifal dot cx> ---
Why should more nonstandard functions with no precedent be added? At the very
least, a usage case for where it's important to have such a function and have a
highly optimized implementation in libc (as opposed to a trivial implementation
in the application that needs it) should be provided before this is even
considered.

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[Bug libc/15973] glibc should provide strnspn() and strncspn()

[allachan at au1 dot ibm.com]

https://sourceware.org/bugzilla/show_bug.cgi?id=15973

paxdiablo <allachan at au1 dot ibm.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |allachan at au1 dot ibm.com

--- Comment #3 from paxdiablo <allachan at au1 dot ibm.com> ---
Have to agree with Rich here, strspn is mandated by ISO C but I cannot find the
n-variant in either ISO or POSIX.

It will need a very good reason for being added, beyond programmers who can't
write safe code without the crutch of so-called safe functions :-)

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[Bug libc/15973] glibc should provide strnspn() and strncspn()

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=15973

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |WONTFIX
              Flags|                            |security-

--- Comment #4 from Florian Weimer <fweimer at redhat dot com> ---
The existing strspn function isn't even such a great model for an API.  In most
cases, it would be beneficial to pre-compile the pattern.  I don't think it
makes sense to add more interfaces with the same issue.

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[Bug libc/15973] glibc should provide strnspn() and strncspn()

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=15973

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |fweimer at redhat dot com

--- Comment #5 from Florian Weimer <fweimer at redhat dot com> ---
The existing strspn function isn't even such a great model for an API.  In most
cases, it would be beneficial to pre-compile the pattern.  I don't think it
makes sense to add more interfaces with the same issue.

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Re: [Bug libc/15973] glibc should provide strnspn() and strncspn()

[Ondřej Bílka]

On Fri, Jun 13, 2014 at 12:48:04PM +0000, fweimer at redhat dot com wrote:
> https://sourceware.org/bugzilla/show_bug.cgi?id=15973
> 
> Florian Weimer <fweimer at redhat dot com> changed:
> 
>            What    |Removed                     |Added
> ----------------------------------------------------------------------------
>                  CC|                            |fweimer at redhat dot com
> 
> --- Comment #5 from Florian Weimer <fweimer at redhat dot com> ---
> The existing strspn function isn't even such a great model for an API.  In most
> cases, it would be beneficial to pre-compile the pattern.  I don't think it
> makes sense to add more interfaces with the same issue.
> 
You could do caching on-line but it is not on my priority list.

[Bug libc/15973] glibc should provide strnspn() and strncspn()

[neleai at seznam dot cz]

https://sourceware.org/bugzilla/show_bug.cgi?id=15973

--- Comment #6 from Ondrej Bilka <neleai at seznam dot cz> ---
On Fri, Jun 13, 2014 at 12:48:04PM +0000, fweimer at redhat dot com wrote:
> https://sourceware.org/bugzilla/show_bug.cgi?id=15973
> 
> Florian Weimer <fweimer at redhat dot com> changed:
> 
>            What    |Removed                     |Added
> ----------------------------------------------------------------------------
>                  CC|                            |fweimer at redhat dot com
> 
> --- Comment #5 from Florian Weimer <fweimer at redhat dot com> ---
> The existing strspn function isn't even such a great model for an API.  In most
> cases, it would be beneficial to pre-compile the pattern.  I don't think it
> makes sense to add more interfaces with the same issue.
> 
You could do caching on-line but it is not on my priority list.

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