src/snprintf/wcio.h

   1 /*      $OpenBSD: wcio.h,v 1.1 2005/06/17 20:40:32 espie Exp $  */
   2 /* $NetBSD: wcio.h,v 1.3 2003/01/18 11:30:00 thorpej Exp $ */
   3
   4 /*
   5  * SPDX-License-Identifier: BSD-2-Clause
   6  *
   7  * Copyright (C)2001 Citrus Project,
   8  * All rights reserved.
   9  *
  10  * $Citrus$
  11  */
  12
  13 #ifndef _WCIO_H_
  14 #define _WCIO_H_
  15
  16 #include <stddef.h>
  17 #include <wchar.h>
  18
  19 /* minimal requirement of SUSv2 */
  20 #define WCIO_UNGETWC_BUFSIZE 1
  21
  22 struct wchar_io_data {
  23         mbstate_t wcio_mbstate_in;
  24         mbstate_t wcio_mbstate_out;
  25
  26         wchar_t wcio_ungetwc_buf[WCIO_UNGETWC_BUFSIZE];
  27         size_t wcio_ungetwc_inbuf;
  28
  29         int wcio_mode; /* orientation */
  30 };
  31
  32 #define WCIO_GET(fp) \
  33         (_EXT(fp) ? &(_EXT(fp)->_wcio) : (struct wchar_io_data *)0)
  34
  35 #define WCIO_GET_NONULL(fp) \
  36         (&(_EXT(fp)->_wcio))
  37
  38 #define _SET_ORIENTATION(fp, mode) \
  39 do {\
  40         struct wchar_io_data *_wcio = WCIO_GET(fp); \
  41         if (_wcio && _wcio->wcio_mode == 0) \
  42                 _wcio->wcio_mode = (mode);\
  43 } while (0)
  44
  45 /*
  46  * WCIO_FREE should be called by fclose
  47  */
  48 #define WCIO_FREE(fp) \
  49 do {\
  50         struct wchar_io_data *_wcio = WCIO_GET(fp); \
  51         if (_wcio) { \
  52                 _wcio->wcio_mode = 0;\
  53                 _wcio->wcio_ungetwc_inbuf = 0;\
  54         } \
  55 } while (0)
  56
  57 #define WCIO_FREEUB(fp) \
  58 do {\
  59         struct wchar_io_data *_wcio = WCIO_GET(fp); \
  60         if (_wcio) { \
  61                 _wcio->wcio_ungetwc_inbuf = 0;\
  62         } \
  63 } while (0)
  64
  65 #define WCIO_INIT(fp) \
  66         memset(WCIO_GET_NONULL(fp), 0, sizeof(struct wchar_io_data))
  67
  68 #endif /*_WCIO_H_*/