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

   1 /*      $NetBSD$        */
   2
   3 /*++
   4 /* NAME
   5 /*      translit 3
   6 /* SUMMARY
   7 /*      transliterate characters
   8 /* SYNOPSIS
   9 /*      #include <stringops.h>
  10 /*
  11 /*      char    *translit(buf, original, replacement)
  12 /*      char    *buf;
  13 /*      char    *original;
  14 /*      char    *replacement;
  15 /* DESCRIPTION
  16 /*      translit() takes a null-terminated string, and replaces characters
  17 /*      given in its \fIoriginal\fR argument by the corresponding characters
  18 /*      in the \fIreplacement\fR string. The result value is the \fIbuf\fR
  19 /*      argument.
  20 /* BUGS
  21 /*      Cannot replace null characters.
  22 /* LICENSE
  23 /* .ad
  24 /* .fi
  25 /*      The Secure Mailer license must be distributed with this software.
  26 /* AUTHOR(S)
  27 /*      Wietse Venema
  28 /*      IBM T.J. Watson Research
  29 /*      P.O. Box 704
  30 /*      Yorktown Heights, NY 10598, USA
  31 /*--*/
  32
  33 /* System library. */
  34
  35 #include "sys_defs.h"
  36 #include <string.h>
  37
  38 /* Utility library. */
  39
  40 #include "stringops.h"
  41
  42 char   *translit(char *string, const char *original, const char *replacement)
  43 {
  44     char   *cp;
  45     const char *op;
  46
  47     /*
  48      * For large inputs, should use a lookup table.
  49      */
  50     for (cp = string; *cp != 0; cp++) {
  51         for (op = original; *op != 0; op++) {
  52             if (*cp == *op) {
  53                 *cp = replacement[op - original];
  54                 break;
  55             }
  56         }
  57     }
  58     return (string);
  59 }
  60
  61 #ifdef TEST
  62
  63  /*
  64   * Usage: translit string1 string2
  65   *
  66   * test program to perform the most basic operation of the UNIX tr command.
  67   */
  68 #include <msg.h>
  69 #include <vstring.h>
  70 #include <vstream.h>
  71 #include <vstring_vstream.h>
  72
  73 #define STR     vstring_str
  74
  75 int     main(int argc, char **argv)
  76 {
  77     VSTRING *buf = vstring_alloc(100);
  78
  79     if (argc != 3)
  80         msg_fatal("usage: %s string1 string2", argv[0]);
  81     while (vstring_fgets(buf, VSTREAM_IN))
  82         vstream_fputs(translit(STR(buf), argv[1], argv[2]), VSTREAM_OUT);
  83     vstream_fflush(VSTREAM_OUT);
  84     vstring_free(buf);
  85     return (0);
  86 }
  87
  88 #endif