diff options
Diffstat (limited to 'ncurses-5.3/ncurses/widechar/lib_get_wch.c')
| -rw-r--r-- | ncurses-5.3/ncurses/widechar/lib_get_wch.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/ncurses-5.3/ncurses/widechar/lib_get_wch.c b/ncurses-5.3/ncurses/widechar/lib_get_wch.c new file mode 100644 index 0000000..8a71352 --- /dev/null +++ b/ncurses-5.3/ncurses/widechar/lib_get_wch.c @@ -0,0 +1,99 @@ +/**************************************************************************** + * Copyright (c) 2002 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 * + ****************************************************************************/ + +/* +** lib_get_wch.c +** +** The routine get_wch(). +** +*/ + +#include <curses.priv.h> + +MODULE_ID("$Id$") + +NCURSES_EXPORT(int) +wget_wch(WINDOW *win, wint_t * result) +{ + int code; + char buffer[(MB_LEN_MAX * 9) + 1]; /* allow some redundant shifts */ + int status; + mbstate_t state; + size_t count = 0; + unsigned long value; + wchar_t wch; + + T((T_CALLED("wget_wch(%p)"), 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. + */ + for (;;) { + T(("reading %d of %d", count + 1, sizeof(buffer))); + code = _nc_wgetch(win, &value, TRUE); + 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) { + ungetch(value); + code = ERR; + } + break; + } else if (count + 1 >= sizeof(buffer)) { + ungetch(value); + code = ERR; + break; + } else { + buffer[count++] = UChar(value); + memset(&state, 0, sizeof(state)); + status = mbrlen(buffer, count, &state); + if (status >= 0) { + memset(&state, 0, sizeof(state)); + if ((int) mbrtowc(&wch, buffer, count, &state) != status) { + code = ERR; /* the two calls should match */ + } + value = wch; + break; + } + } + } + *result = value; + T(("result %#lo", value)); + returnCode(code); +} |