cat.c

[maxime]

Hi,

in the coreutils source of cat

/* cat -- concatenate files and print on the standard output.
  Copyright (C) 88, 90, 91, 1995-2009 Free Software Foundation, Inc.

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

/* Differences from the Unix cat:
  * Always unbuffered, -u is ignored.
  * Usually much faster than other versions of cat, the difference
  is especially apparent when using the -v option.

  By address@hidden, Torbjorn Granlund, advised by rms, Richard Stallman.  */

... many understandable lines ...
 while (++argind < argc);
... some lines...

coreutil 7.2
file cat.c
line 776

I realy don't understand why U use a while loop in this case...

Ive test that :

#include <stdio.h>
#include <stdlib.h>

int ok(int i, int j){
   while(++ i < j);
   return i;
}

int ok2(int i, int j){
   if (i < j) i = j;
   else i++;
   return i;
}

void test(int i, int j){
   printf("%d %d\n", ok(i, j), ok2(i, j));
}

int main(){
   test(1,1);
   test(1,3);
   test(3,1);
   test(2,1);
   test(1,2);
   return 0;
}


the functions ok and ok2 returns same values, but ok2 is better.

plz say me why U write a loop to do that...