tools/crlf.c

   1 /* crlf.c
   2  * Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
   3  *
   4  * This file is free software; as a special exception the author gives
   5  * unlimited permission to copy and/or distribute it, with or without
   6  * modifications, as long as this notice is preserved.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
  10  * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  */
  12
  13 #include <stdio.h>
  14
  15 int
  16 main(int argc, char **argv)
  17 {
  18     int c, lc;
  19     int off=0;
  20
  21     if( argc > 1 ) {
  22         fprintf(stderr, "no arguments, please\n");
  23         return 1;
  24     }
  25
  26     lc = -1;
  27     while( (c=getchar()) != EOF ) {
  28 #if 0
  29         if( c == '\r' && lc == ' ' )
  30             fprintf(stderr,"SP,CR at %d\n", off );
  31         if( c == '\n' && lc == ' ' )
  32             fprintf(stderr,"SP,LF at %d\n", off );
  33 #endif
  34         if( c == '\n' && lc == '\r' )
  35             putchar(c);
  36         else if( c == '\n' ) {
  37             putchar('\r');
  38             putchar(c);
  39         }
  40         else if( c != '\n' && lc == '\r' ) {
  41             putchar('\n');
  42             putchar(c);
  43         }
  44         else
  45             putchar(c);
  46
  47         lc = c;
  48         off++;
  49     }
  50
  51     return 0;
  52 }