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Re: Function to trim trailing spaces

From "Pascal J. Bourguignon" <pjb@informatimago.com>
Newsgroups comp.lang.c
Subject Re: Function to trim trailing spaces
Date 2019-01-24 20:04 +0100
Organization Informatimago
Message-ID <m27eetj2r6.fsf@despina.home> (permalink)
References <p_82E.54640$G14.18982@fx29.iad> <549145a8-950f-4027-9495-b909ab34a6a9@googlegroups.com> <20190124145622.e1d84994616505480789e27b@g{oogle}mail.com> <87d0olyjli.fsf@bsb.me.uk>

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Ben Bacarisse <ben.usenet@bsb.me.uk> writes:

> Anton Shepelev <anton.txt@g{oogle}mail.com> writes:
> <snip>
>> Here is my single-pass version:
>>
>> void rtrim( char * s )
>> {  char *cur, *trim;
>>    cur  = s;
>>    trim = s;
>>    while( *cur != '\0' )
>>    {  if( *cur != ' ' ) trim = cur;
>>       cur++;
>>    }
>>    *(trim+1) = '\0';
>> }
>
> That trims " " to " " and leaves " " unaltered.  I would not expect
> that, though trimming spaces when that means all of them is, I suppose,
> not well-specified.

What's not specified, is mutating literal data, DUH!

-- 
__Pascal J. Bourguignon__
http://www.informatimago.com

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Function to trim trailing spaces DFS <nospam@dfs.com> - 2019-01-23 21:00 -0500
  Re: Function to trim trailing spaces Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2019-01-23 19:14 -0700
    Re: Function to trim trailing spaces DFS <nospam@dfs.com> - 2019-01-23 23:41 -0500
      Re: Function to trim trailing spaces Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2019-01-23 22:40 -0700
        Re: Function to trim trailing spaces Bart <bc@freeuk.com> - 2019-01-24 10:44 +0000
        Re: Function to trim trailing spaces DFS <nospam@dfs.com> - 2019-01-24 11:20 -0500
          Re: Function to trim trailing spaces Bart <bc@freeuk.com> - 2019-01-24 16:47 +0000
            Re: Function to trim trailing spaces DFS <nospam@dfs.com> - 2019-01-24 13:51 -0500
          Re: Function to trim trailing spaces Manfred <noname@invalid.add> - 2019-01-24 17:49 +0100
        Re: Function to trim trailing spaces James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-01-24 08:52 -0800
          Re: Function to trim trailing spaces Bart <bc@freeuk.com> - 2019-01-24 17:40 +0000
          Re: Function to trim trailing spaces James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-01-24 12:08 -0800
            Re: Function to trim trailing spaces Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2019-01-24 14:47 -0700
              Re: Function to trim trailing spaces scott@slp53.sl.home (Scott Lurndal) - 2019-01-25 14:40 +0000
          Re: Function to trim trailing spaces Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2019-01-24 14:44 -0700
      Re: Function to trim trailing spaces Barry Schwarz <schwarzb@dqel.com> - 2019-01-23 23:39 -0800
        Re: Function to trim trailing spaces Rosario19 <Ros@invalid.invalid> - 2019-01-24 10:49 +0100
          Re: Function to trim trailing spaces mark.bluemel@gmail.com - 2019-01-24 01:55 -0800
    Re: Function to trim trailing spaces "Pascal J. Bourguignon" <pjb@informatimago.com> - 2019-01-24 12:58 +0100
    Re: Function to trim trailing spaces Nathan Wagner <nw@hydaspes.if.org> - 2019-01-24 03:01 +0000
  Re: Function to trim trailing spaces Keith Thompson <kst-u@mib.org> - 2019-01-23 18:46 -0800
    Re: Function to trim trailing spaces DFS <nospam@dfs.com> - 2019-01-23 23:38 -0500
      Re: Function to trim trailing spaces Barry Schwarz <schwarzb@dqel.com> - 2019-01-23 23:39 -0800
        Re: Function to trim trailing spaces DFS <nospam@dfs.com> - 2019-01-24 11:25 -0500
          Re: Function to trim trailing spaces mark.bluemel@gmail.com - 2019-01-24 08:34 -0800
          Re: Function to trim trailing spaces Barry Schwarz <schwarzb@dqel.com> - 2019-01-24 15:05 -0800
            Re: Function to trim trailing spaces DFS <nospam@dfs.com> - 2019-01-24 18:40 -0500
      Re: Function to trim trailing spaces Keith Thompson <kst-u@mib.org> - 2019-01-24 02:29 -0800
        Re: Function to trim trailing spaces DFS <nospam@dfs.com> - 2019-01-24 15:06 -0500
          Re: Function to trim trailing spaces Mateusz Viste <mateusz@wont.tell> - 2019-01-24 20:07 +0000
            Re: Function to trim trailing spaces scott@slp53.sl.home (Scott Lurndal) - 2019-01-24 20:24 +0000
              Re: Function to trim trailing spaces Mateusz Viste <mateusz@wont.tell> - 2019-01-24 20:34 +0000
                Re: Function to trim trailing spaces scott@slp53.sl.home (Scott Lurndal) - 2019-01-24 21:37 +0000
          Re: Function to trim trailing spaces Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2019-01-24 15:34 -0500
          Re: Function to trim trailing spaces James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-01-24 13:19 -0800
          Re: Function to trim trailing spaces Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2019-01-24 14:52 -0700
            Re: Function to trim trailing spaces James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-01-24 14:30 -0800
              Re: Function to trim trailing spaces Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2019-01-24 16:59 -0700
          Re: Function to trim trailing spaces Keith Thompson <kst-u@mib.org> - 2019-01-24 14:51 -0800
  Re: Function to trim trailing spaces mark.bluemel@gmail.com - 2019-01-24 01:06 -0800
    Re: Function to trim trailing spaces Keith Thompson <kst-u@mib.org> - 2019-01-24 02:13 -0800
      Re: Function to trim trailing spaces mark.bluemel@gmail.com - 2019-01-24 03:46 -0800
    Re: Function to trim trailing spaces Anton Shepelev <anton.txt@g{oogle}mail.com> - 2019-01-24 14:56 +0300
      Re: Function to trim trailing spaces mark.bluemel@gmail.com - 2019-01-24 05:14 -0800
      Re: Function to trim trailing spaces Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-01-24 18:51 +0000
        Re: Function to trim trailing spaces "Pascal J. Bourguignon" <pjb@informatimago.com> - 2019-01-24 20:04 +0100
          Re: Function to trim trailing spaces Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-01-24 20:25 +0000
          Re: Function to trim trailing spaces Anton Shepelev <anton.txt@gmail.com> - 2019-01-24 23:50 +0300
        Re: Function to trim trailing spaces Anton Shepelev <anton.txt@gmail.com> - 2019-01-24 23:45 +0300
          Re: Function to trim trailing spaces Anton Shepelev <anton.txt@gmail.com> - 2019-01-24 23:54 +0300
      Re: Function to trim trailing spaces Ralf Damaschke <rwspam@gmx.de> - 2019-01-24 22:43 +0000
  Re: Function to trim trailing spaces Bart <bc@freeuk.com> - 2019-01-24 10:57 +0000
    Re: Function to trim trailing spaces Bart <bc@freeuk.com> - 2019-01-24 23:05 +0000
  Function to trim trailing spaces "I Set My Girlfriend's Pantyhose on Fire" <cdalten@gmail.com> - 2019-01-24 03:53 -0800

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