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Re: Character Array vs String

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From James Kuyper <jameskuyper@verizon.net>
Newsgroups comp.lang.c
Subject Re: Character Array vs String
Date Wed, 09 Nov 2011 11:06:15 -0500
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On 11/09/2011 10:48 AM, Malcolm McLean wrote:
...
> For instance IFF files have 4-letter ASCII tags which indicate what
> sort of "chunk" you are reading. So the obvious thing to write is
> 
> fread(chunk, 1, 4, fp);
> if(!strncmp(chunk, "DATA", 4))
>   /* we've got a data chunk */
> 
> That will break on a non-ascii system. The solution is to hardcode the
> values. But then you can no longer read the word "DATA" and it becomes
> a lot harder to see that the chunk identifier is correct.

You can make it a macro, whose name is more informative than the
hardcoded values. However, the better solution (though not always
feasible) is to convert those files from ASCII to the native encoding on
that platform, as part of the process of porting them to that platform.
If a C implementation uses a non-ascii encoding when targeting that
platform, then it's likely to be the case that the local text oriented
utilities (such as file editors or browsers) will do so, as well.

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Thread

Character Array vs String Sheky <shekhar07.nitdgp@gmail.com> - 2011-11-09 03:09 -0800
  Re: Character Array vs String Malcolm McLean <malcolm.mclean5@btinternet.com> - 2011-11-09 03:28 -0800
  Re: Character Array vs String James Kuyper <jameskuyper@verizon.net> - 2011-11-09 06:52 -0500
  Re: Character Array vs String Quentin Carbonneaux <qcarbonn@invalid.com> - 2011-11-09 12:01 +0000
    Re: Character Array vs String 88888 Dihedral <dihedral88888@googlemail.com> - 2011-11-09 04:48 -0800
      Re: Character Array vs String Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-11-09 05:53 -0800
        Re: Character Array vs String "osmium" <r124c4u102@comcast.net> - 2011-11-09 09:44 -0600
          Re: Character Array vs String Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-11-10 00:57 -0800
            Re: Character Array vs String "osmium" <r124c4u102@comcast.net> - 2011-11-10 08:56 -0600
              Re: Character Array vs String Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-11-10 08:16 -0800
                Re: Character Array vs String "Joachim Schmitz" <nospam.jojo@schmitz-digital.de> - 2011-11-10 18:34 +0100
                Re: Character Array vs String Kenneth Brody <kenbrody@spamcop.net> - 2011-11-10 14:08 -0500
                Re: Character Array vs String Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-11-10 20:52 +0000
                Re: Character Array vs String Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-11-11 01:29 -0800
              Re: Character Array vs String Lowell Gilbert <lgusenet@be-well.ilk.org> - 2011-11-10 12:29 -0500
              Re: Character Array vs String lawrence.jones@siemens.com - 2011-11-10 12:32 -0500
                Re: Character Array vs String Keith Thompson <kst-u@mib.org> - 2011-11-10 12:41 -0800
                Re: Character Array vs String jt@toerring.de (Jens Thoms Toerring) - 2011-11-11 13:12 +0000
              Re: Character Array vs String David Thompson <dave.thompson2@verizon.net> - 2011-11-21 02:39 -0500
                Re: Character Array vs String Kenneth Brody <kenbrody@spamcop.net> - 2011-11-23 11:39 -0500
                Re: Character Array vs String "BartC" <bc@freeuk.com> - 2011-11-23 17:15 +0000
                Re: Character Array vs String Kaz Kylheku <kaz@kylheku.com> - 2011-11-23 18:48 +0000
                Re: Character Array vs String Ben Pfaff <blp@cs.stanford.edu> - 2011-11-23 10:58 -0800
                Re: Character Array vs String Patrick Scheible <kkt@zipcon.net> - 2011-11-27 20:21 -0800
                Re: Character Array vs String David Thompson <dave.thompson2@verizon.net> - 2012-01-19 02:43 -0500
        Re: Character Array vs String Malcolm McLean <malcolm.mclean5@btinternet.com> - 2011-11-09 07:48 -0800
          Re: Character Array vs String James Kuyper <jameskuyper@verizon.net> - 2011-11-09 11:06 -0500
            Re: Character Array vs String Willem <willem@toad.stack.nl> - 2011-11-09 16:24 +0000
              Re: Character Array vs String James Kuyper <jameskuyper@verizon.net> - 2011-11-09 11:30 -0500
                Re: Character Array vs String "BartC" <bc@freeuk.com> - 2011-11-09 16:53 +0000
                Re: Character Array vs String Willem <willem@toad.stack.nl> - 2011-11-09 17:05 +0000
                Re: Character Array vs String Malcolm McLean <malcolm.mclean5@btinternet.com> - 2011-11-09 08:54 -0800
                Re: Character Array vs String Tobias Blass <tobiasblass@gmx.net> - 2011-11-09 21:01 +0000
                Re: Character Array vs String "BartC" <bc@freeuk.com> - 2011-11-09 21:26 +0000
                Re: Character Array vs String Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-11-10 01:11 -0800
                Re: Character Array vs String David Thompson <dave.thompson2@verizon.net> - 2011-11-21 02:39 -0500
                Re: Character Array vs String Keith Thompson <kst-u@mib.org> - 2011-11-21 00:15 -0800
                Re: Character Array vs String Keith Thompson <kst-u@mib.org> - 2011-11-09 14:06 -0800
                Re: Character Array vs String Stephen Sprunk <stephen@sprunk.org> - 2011-11-09 19:32 -0600
                Re: Character Array vs String Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-11-10 03:21 +0000
                Re: Character Array vs String "BartC" <bc@freeuk.com> - 2011-11-10 11:00 +0000
                Re: Character Array vs String Keith Thompson <kst-u@mib.org> - 2011-11-10 03:26 -0800
                Re: Character Array vs String Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-11-10 12:04 +0000
                Re: Character Array vs String Lew Pitcher <lpitcher@teksavvy.com> - 2011-11-21 12:02 -0800
                Re: Character Array vs String Kenneth Brody <kenbrody@spamcop.net> - 2011-11-23 11:42 -0500
                Re: Character Array vs String Uno <merrilljensen@q.com> - 2011-11-27 22:46 -0700
                Re: Character Array vs String Lew Pitcher <lpitcher@teksavvy.com> - 2011-11-27 23:30 -0800
                Re: Character Array vs String Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-11-28 00:22 -0800
        Re: Character Array vs String Keith Thompson <kst-u@mib.org> - 2011-11-09 13:59 -0800
    Re: Character Array vs String James Kuyper <jameskuyper@verizon.net> - 2011-11-09 08:36 -0500
      Re: Character Array vs String Quentin Carbonneaux <qcarbonn@invalid.com> - 2011-11-09 14:06 +0000
    Re: Character Array vs String Malcolm McLean <malcolm.mclean5@btinternet.com> - 2011-11-09 05:38 -0800
    Re: Character Array vs String Keith Thompson <kst-u@mib.org> - 2011-11-09 13:52 -0800
  Re: Character Array vs String Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-11-09 07:39 -0500
  Re: Character Array vs String "BartC" <bc@freeuk.com> - 2011-11-09 13:51 +0000
  Re: Character Array vs String John Bode <jfbode1029@gmail.com> - 2011-11-23 19:32 -0800
    Re: Character Array vs String James Kuyper <jameskuyper@verizon.net> - 2011-11-24 11:49 -0500

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