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

   1 /*      $NetBSD$        */
   2
   3 /*++
   4 /* NAME
   5 /*      split_at 3
   6 /* SUMMARY
   7 /*      trivial token splitter
   8 /* SYNOPSIS
   9 /*      #include <split_at.h>
  10 /*
  11 /*      char    *split_at(string, delimiter)
  12 /*      char    *string;
  13 /*      int     delimiter
  14 /*
  15 /*      char    *split_at_right(string, delimiter)
  16 /*      char    *string;
  17 /*      int     delimiter
  18 /* DESCRIPTION
  19 /*      split_at() null-terminates the \fIstring\fR at the first
  20 /*      occurrence of the \fIdelimiter\fR character found, and
  21 /*      returns a pointer to the remainder.
  22 /*
  23 /*      split_at_right() looks for the rightmost delimiter
  24 /*      occurrence, but is otherwise identical to split_at().
  25 /* DIAGNOSTICS
  26 /*      The result is a null pointer when the delimiter character
  27 /*      was not found.
  28 /* HISTORY
  29 /* .ad
  30 /* .fi
  31 /*      A split_at() routine appears in the TCP Wrapper software
  32 /*      by Wietse Venema.
  33 /* LICENSE
  34 /* .ad
  35 /* .fi
  36 /*      The Secure Mailer license must be distributed with this software.
  37 /* AUTHOR(S)
  38 /*      Wietse Venema
  39 /*      IBM T.J. Watson Research
  40 /*      P.O. Box 704
  41 /*      Yorktown Heights, NY 10598, USA
  42 /*--*/
  43
  44 /* System libraries */
  45
  46 #include <sys_defs.h>
  47 #include <string.h>
  48
  49 /* Utility library. */
  50
  51 #include "split_at.h"
  52
  53 /* split_at - break string at first delimiter, return remainder */
  54
  55 char   *split_at(char *string, int delimiter)
  56 {
  57     char   *cp;
  58
  59     if ((cp = strchr(string, delimiter)) != 0)
  60         *cp++ = 0;
  61     return (cp);
  62 }
  63
  64 /* split_at_right - break string at last delimiter, return remainder */
  65
  66 char   *split_at_right(char *string, int delimiter)
  67 {
  68     char   *cp;
  69
  70     if ((cp = strrchr(string, delimiter)) != 0)
  71         *cp++ = 0;
  72     return (cp);
  73 }