some unusual errors

Michael Richardson mcr@solidum.com
Mon Sep 21 22:08:00 GMT 1998


>>>>> "Matthew" == Matthew O Persico <mpersico@erols.com> writes:

    Matthew> Michael Richardson wrote:
    >> 
    >> I get a lot of warnings like this:
    >> 
    >> strtod.c:1239: warning: subscript has type `char'
    >> 
    >> This line of code is actually:
    >> 
    >> for(s = s00; isspace(*s); s++)
    >> 
    >> which confuses me. What, if not "char" should isspace() take???
    >> 
    Matthew> int. In the bad old days (pre-ANSI) ints and chars swapped positions
    Matthew> more often than Clinton does, apparently. Try this (UNTESTED!)

    Matthew> for(s = s00; isspace((int)*s); s++)

    Matthew> You could have found this out a lot faster from any good 'C' book, esp
    Matthew> K&R. 

  Yes, I understand that. So? Promote the char to int. End of problem. I
shouldn't have to write that cast!

  I don't get this warning on any other system using GCC. (Linux, NetBSD,
Solaris). So I assume that there is something up with either the macro or the 
prototype of isspace() on Cygwin.

   :!mcr!:            |  Solidum Systems Corporation, http://www.solidum.com
   Michael Richardson |For a better connected world,where data flows faster<tm>
 Personal: <A HREF=" http://www.sandelman.ottawa.on.ca/People/Michael_Richardson/Bio.html ">mcr@sandelman.ottawa.on.ca</A>. PGP key available.
 Corporate: <A HREF=" mailto:mcr@solidum.com ">mcr@solidum.com</A>. 



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