contrib/tar/lib/unicodeio.h

   1 /* Unicode character output to streams with locale dependent encoding.
   2
   3    Copyright (C) 2000, 2001 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 2, or (at your option)
   8    any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software Foundation,
  17    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  18
  19 #ifndef UNICODEIO_H
  20 # define UNICODEIO_H
  21
  22 # include <stdio.h>
  23
  24 # ifndef PARAMS
  25 #  if defined PROTOTYPES || (defined __STDC__ && __STDC__)
  26 #   define PARAMS(Args) Args
  27 #  else
  28 #   define PARAMS(Args) ()
  29 #  endif
  30 # endif
  31
  32 /* Converts the Unicode character CODE to its multibyte representation
  33    in the current locale and calls the CALLBACK on the resulting byte
  34    sequence.  If an error occurs, invokes ERROR_CALLBACK instead,
  35    passing it CODE with errno set appropriately.  Returns whatever the
  36    callback returns.  */
  37 extern int unicode_to_mb
  38             PARAMS ((unsigned int code,
  39                      int (*callback) PARAMS ((const char *buf, size_t buflen,
  40                                               void *callback_arg)),
  41                      int (*error_callback) PARAMS ((unsigned int code,
  42                                                     void * callback_arg)),
  43                      void *callback_arg));
  44
  45 /* Success callback that outputs the conversion of the character.  */
  46 extern int print_unicode_success PARAMS((const char *buf, size_t buflen,
  47                                          void *callback_arg));
  48
  49 /* Failure callback that outputs an ASCII representation.  */
  50 extern int print_unicode_failure PARAMS((unsigned int code,
  51                                          void *callback_arg));
  52
  53 /* Outputs the Unicode character CODE to the output stream STREAM.
  54    Returns -1 (setting errno) if unsuccessful.  */
  55 extern int print_unicode_char PARAMS((FILE *stream, unsigned int code));
  56
  57 #endif