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

   1 /*      $NetBSD$        */
   2
   3 /*++
   4 /* NAME
   5 /*      neuter 3
   6 /* SUMMARY
   7 /*      neutralize characters before they can explode
   8 /* SYNOPSIS
   9 /*      #include <stringops.h>
  10 /*
  11 /*      char    *neuter(buffer, bad, replacement)
  12 /*      char    *buffer;
  13 /*      const char *bad;
  14 /*      int     replacement;
  15 /* DESCRIPTION
  16 /*      neuter() replaces bad characters in its input
  17 /*      by the given replacement.
  18 /*
  19 /*      Arguments:
  20 /* .IP buffer
  21 /*      The null-terminated input string.
  22 /* .IP bad
  23 /*      The null-terminated bad character string.
  24 /* .IP replacement
  25 /*      Replacement value for characters in \fIbuffer\fR that do not
  26 /*      pass the  bad character test.
  27 /* LICENSE
  28 /* .ad
  29 /* .fi
  30 /*      The Secure Mailer license must be distributed with this software.
  31 /* AUTHOR(S)
  32 /*      Wietse Venema
  33 /*      IBM T.J. Watson Research
  34 /*      P.O. Box 704
  35 /*      Yorktown Heights, NY 10598, USA
  36 /*--*/
  37
  38 /* System library. */
  39
  40 #include <sys_defs.h>
  41 #include <string.h>
  42
  43 /* Utility library. */
  44
  45 #include <stringops.h>
  46
  47 /* neuter - neutralize bad characters */
  48
  49 char   *neuter(char *string, const char *bad, int replacement)
  50 {
  51     char   *cp;
  52     int     ch;
  53
  54     for (cp = string; (ch = *(unsigned char *) cp) != 0; cp++)
  55         if (strchr(bad, ch) != 0)
  56             *cp = replacement;
  57     return (string);
  58 }