diff options
Diffstat (limited to 'ncurses-5.9/ncurses/widechar/lib_get_wch.c')
-rw-r--r-- | ncurses-5.9/ncurses/widechar/lib_get_wch.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/ncurses-5.9/ncurses/widechar/lib_get_wch.c b/ncurses-5.9/ncurses/widechar/lib_get_wch.c new file mode 100644 index 0000000..095b1f7 --- /dev/null +++ b/ncurses-5.9/ncurses/widechar/lib_get_wch.c @@ -0,0 +1,113 @@ +/**************************************************************************** + * Copyright (c) 2002-2009,2010 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: Thomas E. Dickey 2002-on * + ****************************************************************************/ + +/* +** lib_get_wch.c +** +** The routine get_wch(). +** +*/ + +#include <curses.priv.h> +#include <ctype.h> + +MODULE_ID("$Id$") + +NCURSES_EXPORT(int) +wget_wch(WINDOW *win, wint_t *result) +{ + SCREEN *sp; + int code; + char buffer[(MB_LEN_MAX * 9) + 1]; /* allow some redundant shifts */ + int status; + size_t count = 0; + int value = 0; + wchar_t wch; +#ifndef state_unused + mbstate_t state; +#endif + + T((T_CALLED("wget_wch(%p)"), (void *) win)); + + /* + * We can get a stream of single-byte characters and KEY_xxx codes from + * _nc_wgetch(), while we want to return a wide character or KEY_xxx code. + */ + _nc_lock_global(curses); + sp = _nc_screen_of(win); + if (sp != 0) { + for (;;) { + T(("reading %d of %d", (int) count + 1, (int) sizeof(buffer))); + code = _nc_wgetch(win, &value, TRUE EVENTLIST_2nd((_nc_eventlist + *) 0)); + if (code == ERR) { + break; + } else if (code == KEY_CODE_YES) { + /* + * If we were processing an incomplete multibyte character, + * return an error since we have a KEY_xxx code which + * interrupts it. For some cases, we could improve this by + * writing a new version of lib_getch.c(!), but it is not clear + * whether the improvement would be worth the effort. + */ + if (count != 0) { + safe_ungetch(SP_PARM, value); + code = ERR; + } + break; + } else if (count + 1 >= sizeof(buffer)) { + safe_ungetch(SP_PARM, value); + code = ERR; + break; + } else { + buffer[count++] = (char) UChar(value); + reset_mbytes(state); + status = count_mbytes(buffer, count, state); + if (status >= 0) { + reset_mbytes(state); + if (check_mbytes(wch, buffer, count, state) != status) { + code = ERR; /* the two calls should match */ + safe_ungetch(SP_PARM, value); + } + value = wch; + break; + } + } + } + } else { + code = ERR; + } + *result = (wint_t) value; + _nc_unlock_global(curses); + T(("result %#o", value)); + returnCode(code); +} |