external/ibm-public/postfix/dist/src/util/printable.c

   1 /*      $NetBSD$        */
   2
   3 /*++
   4 /* NAME
   5 /*      printable 3
   6 /* SUMMARY
   7 /*      mask non-printable characters
   8 /* SYNOPSIS
   9 /*      #include <stringops.h>
  10 /*
  11 /*      char    *printable(buffer, replacement)
  12 /*      char    *buffer;
  13 /*      int     replacement;
  14 /* DESCRIPTION
  15 /*      printable() replaces non-ASCII or non-printable characters in its input
  16 /*      by the given replacement.
  17 /*
  18 /*      Arguments:
  19 /* .IP buffer
  20 /*      The null-terminated input string.
  21 /* .IP replacement
  22 /*      Replacement value for characters in \fIbuffer\fR that do not
  23 /*      pass the isprint(3) test.
  24 /* LICENSE
  25 /* .ad
  26 /* .fi
  27 /*      The Secure Mailer license must be distributed with this software.
  28 /* AUTHOR(S)
  29 /*      Wietse Venema
  30 /*      IBM T.J. Watson Research
  31 /*      P.O. Box 704
  32 /*      Yorktown Heights, NY 10598, USA
  33 /*--*/
  34
  35 /* System library. */
  36
  37 #include "sys_defs.h"
  38 #include <ctype.h>
  39
  40 /* Utility library. */
  41
  42 #include "stringops.h"
  43
  44 char   *printable(char *string, int replacement)
  45 {
  46     char   *cp;
  47     int     ch;
  48
  49     for (cp = string; (ch = *(unsigned char *) cp) != 0; cp++)
  50         if (!ISASCII(ch) || !ISPRINT(ch))
  51             *cp = replacement;
  52     return (string);
  53 }