contrib/nvi2/common/conv.h

   1 /*-
   2  * Copyright (c) 1992, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  * Copyright (c) 1992, 1993, 1994, 1995, 1996
   5  *      Keith Bostic.  All rights reserved.
   6  * Copyright (c) 2011, 2012
   7  *      Zhihao Yuan.  All rights reserved.
   8  *
   9  * See the LICENSE file for redistribution information.
  10  *
  11  *      $Id: conv.h,v 2.32 2013/03/11 01:20:53 zy Exp $
  12  */
  13
  14 #ifdef USE_ICONV
  15 #include <iconv.h>
  16 #ifdef ICONV_TRADITIONAL
  17 typedef char **         iconv_src_t;
  18 #else
  19 typedef char const **   iconv_src_t;
  20 #endif
  21 #else
  22 typedef int     iconv_t;
  23 #endif
  24
  25 /*
  26  * XXX
  27  * We can not use MB_CUR_MAX here, since UTF-8 may report it as 6, but
  28  * a sequence longer than 4 is deprecated by RFC 3629.
  29  */
  30 #define KEY_NEEDSWIDE(sp, ch)                                           \
  31         (INTISWIDE(ch) && KEY_LEN(sp, ch) <= 4)
  32 #define KEY_COL(sp, ch)                                                 \
  33         (KEY_NEEDSWIDE(sp, ch) ? CHAR_WIDTH(sp, ch) : KEY_LEN(sp, ch))
  34
  35 enum { IC_FE_CHAR2INT, IC_FE_INT2CHAR, IC_IE_CHAR2INT, IC_IE_TO_UTF16 };
  36
  37 struct _conv_win {
  38         union {
  39                 char    *c;
  40                 CHAR_T  *wc;
  41         }       bp1;
  42         size_t  blen1;
  43 };
  44
  45 typedef int (*char2wchar_t)
  46     (SCR *, const char *, ssize_t, struct _conv_win *, size_t *, CHAR_T **);
  47 typedef int (*wchar2char_t)
  48     (SCR *, const CHAR_T *, ssize_t, struct _conv_win *, size_t *, char **);
  49
  50 struct _conv {
  51         char2wchar_t    sys2int;
  52         wchar2char_t    int2sys;
  53         char2wchar_t    file2int;
  54         wchar2char_t    int2file;
  55         char2wchar_t    input2int;
  56         iconv_t         id[IC_IE_TO_UTF16 + 1];
  57 };