src/tests/kits/net/sock/crlf.c

   1 /* -*- c-basic-offset: 8; -*-
   2  *
   3  * Copyright (c) 1993 W. Richard Stevens.  All rights reserved.
   4  * Permission to use or modify this software and its documentation only for
   5  * educational purposes and without fee is hereby granted, provided that
   6  * the above copyright notice appear in all copies.  The author makes no
   7  * representations about the suitability of this software for any purpose.
   8  * It is provided "as is" without express or implied warranty.
   9  */
  10
  11 #include        "sock.h"
  12
  13 /* Convert newline to return/newline. */
  14
  15 int
  16 crlf_add(char *dst, int dstsize, const char *src, int lenin)
  17 {
  18         int     lenout;
  19         char    c;
  20
  21         if ( (lenout = lenin) > dstsize)
  22                         err_quit("crlf_add: destination not big enough");
  23
  24         for ( ; lenin > 0; lenin--) {
  25                 if ( (c = *src++) == '\n') {
  26                         if (++lenout >= dstsize)
  27                                 err_quit("crlf_add: destination not big enough");
  28                         *dst++ = '\r';
  29                 }
  30                 *dst++ = c;
  31         }
  32
  33         return(lenout);
  34 }
  35
  36 int
  37 crlf_strip(char *dst, int dstsize, const char *src, int lenin)
  38 {
  39         int             lenout;
  40         char    c;
  41
  42         for (lenout = 0; lenin > 0; lenin--) {
  43                 if ( (c = *src++) != '\r') {
  44                         if (++lenout >= dstsize)
  45                                 err_quit("crlf_strip: destination not big enough");
  46                         *dst++ = c;
  47                 }
  48         }
  49
  50         return(lenout);
  51 }