release/src/router/libncurses/ncurses/base/lib_insch.c

   1 /****************************************************************************
   2  * Copyright (c) 1998-2012,2013 Free Software Foundation, Inc.              *
   3  *                                                                          *
   4  * Permission is hereby granted, free of charge, to any person obtaining a  *
   5  * copy of this software and associated documentation files (the            *
   6  * "Software"), to deal in the Software without restriction, including      *
   7  * without limitation the rights to use, copy, modify, merge, publish,      *
   8  * distribute, distribute with modifications, sublicense, and/or sell       *
   9  * copies of the Software, and to permit persons to whom the Software is    *
  10  * furnished to do so, subject to the following conditions:                 *
  11  *                                                                          *
  12  * The above copyright notice and this permission notice shall be included  *
  13  * in all copies or substantial portions of the Software.                   *
  14  *                                                                          *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
  16  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
  18  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
  21  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
  22  *                                                                          *
  23  * Except as contained in this notice, the name(s) of the above copyright   *
  24  * holders shall not be used in advertising or otherwise to promote the     *
  25  * sale, use or other dealings in this Software without prior written       *
  26  * authorization.                                                           *
  27  ****************************************************************************/
  28
  29 /****************************************************************************
  30  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
  31  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
  32  *     and: Sven Verdoolaege                                                *
  33  *     and: Thomas E. Dickey                                                *
  34  ****************************************************************************/
  35
  36 /*
  37 **      lib_insch.c
  38 **
  39 **      The routine winsch().
  40 **
  41 */
  42
  43 #include <curses.priv.h>
  44 #include <ctype.h>
  45
  46 MODULE_ID("$Id: lib_insch.c,v 1.35 2013/05/18 21:58:56 tom Exp $")
  47
  48 /*
  49  * Insert the given character, updating the current location to simplify
  50  * inserting a string.
  51  */
  52 NCURSES_EXPORT(int)
  53 _nc_insert_ch(SCREEN *sp, WINDOW *win, chtype ch)
  54 {
  55     int code = OK;
  56     int ch8 = (int) ChCharOf(ch);
  57     NCURSES_CH_T wch;
  58     int count;
  59     NCURSES_CONST char *s;
  60     int tabsize = (
  61 #if USE_REENTRANT
  62                       sp->_TABSIZE
  63 #else
  64                       TABSIZE
  65 #endif
  66     );
  67
  68     switch (ch) {
  69     case '\t':
  70         for (count = (tabsize - (win->_curx % tabsize)); count > 0; count--) {
  71             if ((code = _nc_insert_ch(sp, win, ' ')) != OK)
  72                 break;
  73         }
  74         break;
  75     case '\n':
  76     case '\r':
  77     case '\b':
  78         SetChar2(wch, ch);
  79         _nc_waddch_nosync(win, wch);
  80         break;
  81     default:
  82         if (
  83 #if USE_WIDEC_SUPPORT
  84                WINDOW_EXT(win, addch_used) == 0 &&
  85 #endif
  86                (isprint(ch8) ||
  87                 (ChAttrOf(ch) & A_ALTCHARSET) ||
  88                 (sp != 0 && sp->_legacy_coding && !iscntrl(ch8)))) {
  89             if (win->_curx <= win->_maxx) {
  90                 struct ldat *line = &(win->_line[win->_cury]);
  91                 NCURSES_CH_T *end = &(line->text[win->_curx]);
  92                 NCURSES_CH_T *temp1 = &(line->text[win->_maxx]);
  93                 NCURSES_CH_T *temp2 = temp1 - 1;
  94
  95                 SetChar2(wch, ch);
  96
  97                 CHANGED_TO_EOL(line, win->_curx, win->_maxx);
  98                 while (temp1 > end)
  99                     *temp1-- = *temp2--;
 100
 101                 *temp1 = _nc_render(win, wch);
 102                 win->_curx++;
 103             }
 104         } else if (iscntrl(ch8)) {
 105             s = NCURSES_SP_NAME(unctrl) (NCURSES_SP_ARGx (chtype) ch8);
 106             while (*s != '\0') {
 107                 code = _nc_insert_ch(sp, win, ChAttrOf(ch) | UChar(*s));
 108                 if (code != OK)
 109                     break;
 110                 ++s;
 111             }
 112         }
 113 #if USE_WIDEC_SUPPORT
 114         else {
 115             /*
 116              * Handle multibyte characters here
 117              */
 118             SetChar2(wch, ch);
 119             wch = _nc_render(win, wch);
 120             count = _nc_build_wch(win, &wch);
 121             if (count > 0) {
 122                 code = _nc_insert_wch(win, &wch);
 123             } else if (count == -1) {
 124                 /* handle EILSEQ */
 125                 s = NCURSES_SP_NAME(unctrl) (NCURSES_SP_ARGx (chtype) ch8);
 126                 if (strlen(s) > 1) {
 127                     while (*s != '\0') {
 128                         code = _nc_insert_ch(sp, win,
 129                                              ChAttrOf(ch) | UChar(*s));
 130                         if (code != OK)
 131                             break;
 132                         ++s;
 133                     }
 134                 } else {
 135                     code = ERR;
 136                 }
 137             }
 138         }
 139 #endif
 140         break;
 141     }
 142     return code;
 143 }
 144
 145 NCURSES_EXPORT(int)
 146 winsch(WINDOW *win, chtype c)
 147 {
 148     NCURSES_SIZE_T oy;
 149     NCURSES_SIZE_T ox;
 150     int code = ERR;
 151
 152     T((T_CALLED("winsch(%p, %s)"), (void *) win, _tracechtype(c)));
 153
 154     if (win != 0) {
 155         oy = win->_cury;
 156         ox = win->_curx;
 157
 158         code = _nc_insert_ch(_nc_screen_of(win), win, c);
 159
 160         win->_curx = ox;
 161         win->_cury = oy;
 162         _nc_synchook(win);
 163     }
 164     returnCode(code);
 165 }