text: /****************************************************************************
   * Copyright (c) 1998-2004,2006 Free Software Foundation, Inc.              *
   *                                                                          *
   * Permission is hereby granted, free of charge, to any person obtaining a  *
   * copy of this software and associated documentation files (the            *
   * "Software"), to deal in the Software without restriction, including      *
   * without limitation the rights to use, copy, modify, merge, publish,      *
   * distribute, distribute with modifications, sublicense, and/or sell       *
   * copies of the Software, and to permit persons to whom the Software is    *
   * furnished to do so, subject to the following conditions:                 *
   *                                                                          *
   * The above copyright notice and this permission notice shall be included  *
   * in all copies or substantial portions of the Software.                   *
   *                                                                          *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
   * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
   * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
   * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
   * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
   * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
   *                                                                          *
   * Except as contained in this notice, the name(s) of the above copyright   *
   * holders shall not be used in advertising or otherwise to promote the     *
   * sale, use or other dealings in this Software without prior written       *
   * authorization.                                                           *
   ****************************************************************************/
  
  /****************************************************************************
   *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
   *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
   *                                                                          *
   *  Rewritten 2001-2004 to support wide-characters by                       *
   *	Sven Verdoolaege                                                    *
   *	Thomas Dickey                                                       *
   ****************************************************************************/
  
  /*
  **	lib_addstr.c
  *
  **	The routines waddnstr(), waddchnstr().
  **
  */
  
  #include <curses.priv.h>
  
  MODULE_ID("$Id: lib_addstr.c,v 1.46 2006/05/27 19:22:19 tom Exp $")
  
  NCURSES_EXPORT(int)
  waddnstr(WINDOW *win, const char *astr, int n)
  {
      const char *str = astr;
      int code = ERR;
  
      T((T_CALLED("waddnstr(%p,%s,%d)"), win, _nc_visbufn(astr, n), n));
  
      if (win && (str != 0)) {
  	TR(TRACE_VIRTPUT | TRACE_ATTRS,
  	   ("... current %s", _traceattr(WINDOW_ATTRS(win))));
  	code = OK;
  	if (n < 0)
  	    n = (int) strlen(astr);
  
  	TR(TRACE_VIRTPUT, ("str is not null, length = %d", n));
  	while ((n-- > 0) && (*str != '\0')) {
  	    NCURSES_CH_T ch;
  	    TR(TRACE_VIRTPUT, ("*str = %#o", UChar(*str)));
  	    SetChar(ch, UChar(*str++), A_NORMAL);
  	    if (_nc_waddch_nosync(win, ch) == ERR) {
  		code = ERR;
  		break;
  	    }
  	}
  	_nc_synchook(win);
      }
      TR(TRACE_VIRTPUT, ("waddnstr returns %d", code));
      returnCode(code);
  }
  
  NCURSES_EXPORT(int)
  waddchnstr(WINDOW *win, const chtype *astr, int n)
  {
      NCURSES_SIZE_T y = win->_cury;
      NCURSES_SIZE_T x = win->_curx;
      int code = OK;
      int i;
      struct ldat *line;
  
      T((T_CALLED("waddchnstr(%p,%p,%d)"), win, astr, n));
  
      if (!win)
  	returnCode(ERR);
  
      if (n < 0) {
  	const chtype *str;
  	n = 0;
  	for (str = (const chtype *) astr; *str != 0; str++)
  	    n++;
      }
      if (n > win->_maxx - x + 1)
  	n = win->_maxx - x + 1;
      if (n == 0)
  	returnCode(code);
  
      line = &(win->_line[y]);
      for (i = 0; i < n && ChCharOf(astr[i]) != '\0'; ++i) {
  	SetChar2(line->text[i + x], astr[i]);
      }
      CHANGED_RANGE(line, x, x + n - 1);
  
      _nc_synchook(win);
      returnCode(code);
  }
  
  #if USE_WIDEC_SUPPORT
  
  NCURSES_EXPORT(int)
  _nc_wchstrlen(const cchar_t *s)
  {
      int result = 0;
      while (CharOf(s[result]) != L'\0') {
  	result++;
      }
      return result;
  }
  
  NCURSES_EXPORT(int)
  wadd_wchnstr(WINDOW *win, const cchar_t *astr, int n)
  {
      static const NCURSES_CH_T blank = NewChar(BLANK_TEXT);
      NCURSES_SIZE_T y = win->_cury;
      NCURSES_SIZE_T x = win->_curx;
      int code = OK;
      struct ldat *line;
      int i, j, start, len, end;
  
      T((T_CALLED("wadd_wchnstr(%p,%s,%d)"), win, _nc_viscbuf(astr, n), n));
  
      if (!win)
  	returnCode(ERR);
  
      if (n < 0) {
  	n = _nc_wchstrlen(astr);
      }
      if (n > win->_maxx - x + 1)
  	n = win->_maxx - x + 1;
      if (n == 0)
  	returnCode(code);
  
      line = &(win->_line[y]);
      start = x;
      end = x + n - 1;
  
      /*
       * Reset orphaned cells of multi-column characters that extend up to the
       * new string's location to blanks.
       */
      if (x > 0 && isWidecExt(line->text[x])) {
  	for (i = 0; i <= x; ++i) {
  	    if (!isWidecExt(line->text[x - i])) {
  		/* must be isWidecBase() */
  		start -= i;
  		while (i > 0) {
  		    line->text[x - i--] = _nc_render(win, blank);
  		}
  		break;
  	    }
  	}
      }
  
      /*
       * Copy the new string to the window.
       */
      for (i = 0; i < n && CharOf(astr[i]) != L'\0' && x <= win->_maxx; ++i) {
  	if (isWidecExt(astr[i]))
  	    continue;
  
  	len = wcwidth(CharOf(astr[i]));
  
  	if (x + len - 1 <= win->_maxx) {
  	    line->text[x] = _nc_render(win, astr[i]);
  	    if (len > 1) {
  		for (j = 0; j < len; ++j) {
  		    if (j != 0) {
  			line->text[x + j] = line->text[x];
  		    }
  		    SetWidecExt(line->text[x + j], j);
  		}
  	    }
  	    x += len;
  	    end += len - 1;
  	} else {
  	    break;
  	}
      }
  
      /*
       * Set orphaned cells of multi-column characters which lie after the new
       * string to blanks.
       */
      while (x <= win->_maxx && isWidecExt(line->text[x])) {
  	line->text[x] = _nc_render(win, blank);
  	++end;
  	++x;
      }
      CHANGED_RANGE(line, start, end);
  
      _nc_synchook(win);
      returnCode(code);
  }
  
  NCURSES_EXPORT(int)
  waddnwstr(WINDOW *win, const wchar_t *str, int n)
  {
      int code = ERR;
  
      T((T_CALLED("waddnwstr(%p,%s,%d)"), win, _nc_viswbufn(str, n), n));
  
      if (win && (str != 0)) {
  	TR(TRACE_VIRTPUT | TRACE_ATTRS,
  	   ("... current %s", _traceattr(WINDOW_ATTRS(win))));
  	code = OK;
  	if (n < 0)
  	    n = (int) wcslen(str);
  
  	TR(TRACE_VIRTPUT, ("str is not null, length = %d", n));
  	while ((n-- > 0) && (*str != L('\0'))) {
  	    NCURSES_CH_T ch;
  	    TR(TRACE_VIRTPUT, ("*str[0] = %#lx", (unsigned long) *str));
  	    SetChar(ch, *str++, A_NORMAL);
  	    if (wadd_wch(win, &ch) == ERR) {
  		code = ERR;
  		break;
  	    }
  	}
  	_nc_synchook(win);
      }
      TR(TRACE_VIRTPUT, ("waddnwstr returns %d", code));
      returnCode(code);
  }
  
  #endif
  