release/src/router/libncurses/ncurses/widechar/lib_inwstr.c

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  28
  29 /****************************************************************************
  30  * Author: Thomas Dickey                                                    *
  31  ****************************************************************************/
  32
  33 /*
  34 **      lib_inwstr.c
  35 **
  36 **      The routines winnwstr() and winwstr().
  37 **
  38 */
  39
  40 #include <curses.priv.h>
  41
  42 MODULE_ID("$Id: lib_inwstr.c,v 1.6 2011/05/28 22:49:49 tom Exp $")
  43
  44 NCURSES_EXPORT(int)
  45 winnwstr(WINDOW *win, wchar_t *wstr, int n)
  46 {
  47     int row, col, inx;
  48     int count = 0;
  49     int last = 0;
  50     cchar_t *text;
  51     wchar_t wch;
  52
  53     T((T_CALLED("winnwstr(%p,%p,%d)"), (void *) win, (void *) wstr, n));
  54     if (wstr != 0) {
  55         if (win) {
  56             getyx(win, row, col);
  57
  58             text = win->_line[row].text;
  59             while (count < n && count != ERR) {
  60                 if (!isWidecExt(text[col])) {
  61                     for (inx = 0; (inx < CCHARW_MAX)
  62                          && ((wch = text[col].chars[inx]) != 0);
  63                          ++inx) {
  64                         if (count + 1 > n) {
  65                             if ((count = last) == 0) {
  66                                 count = ERR;    /* error if we store nothing */
  67                             }
  68                             break;
  69                         }
  70                         wstr[count++] = wch;
  71                     }
  72                 }
  73                 last = count;
  74                 if (++col > win->_maxx) {
  75                     break;
  76                 }
  77             }
  78         }
  79         if (count > 0) {
  80             wstr[count] = '\0';
  81             T(("winnwstr returns %s", _nc_viswbuf(wstr)));
  82         }
  83     }
  84     returnCode(count);
  85 }
  86
  87 /*
  88  * X/Open says winwstr() returns OK if not ERR.  If that is not a blunder, it
  89  * must have a null termination on the string (see above).  Unlike winnstr(),
  90  * it does not define what happens for a negative count with winnwstr().
  91  */
  92 NCURSES_EXPORT(int)
  93 winwstr(WINDOW *win, wchar_t *wstr)
  94 {
  95     int result = OK;
  96
  97     T((T_CALLED("winwstr(%p,%p)"), (void *) win, (void *) wstr));
  98     if (win == 0) {
  99         result = ERR;
 100     } else if (winnwstr(win, wstr,
 101                         CCHARW_MAX * (win->_maxx - win->_curx + 1)) == ERR) {
 102         result = ERR;
 103     }
 104     returnCode(result);
 105 }