diff options
Diffstat (limited to 'ncurses-5.9/ncurses/widechar/lib_unget_wch.c')
| -rw-r--r-- | ncurses-5.9/ncurses/widechar/lib_unget_wch.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/ncurses-5.9/ncurses/widechar/lib_unget_wch.c b/ncurses-5.9/ncurses/widechar/lib_unget_wch.c new file mode 100644 index 0000000..15f9366 --- /dev/null +++ b/ncurses-5.9/ncurses/widechar/lib_unget_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 * + ****************************************************************************/ + +/* +** lib_unget_wch.c +** +** The routine unget_wch(). +** +*/ + +#include <curses.priv.h> + +MODULE_ID("$Id$") + +/* + * Wrapper for wcrtomb() which obtains the length needed for the given + * wide-character 'source'. + */ +NCURSES_EXPORT(size_t) +_nc_wcrtomb(char *target, wchar_t source, mbstate_t * state) +{ + int result; + + if (target == 0) { + wchar_t temp[2]; + const wchar_t *tempp = temp; + temp[0] = source; + temp[1] = 0; + result = (int) wcsrtombs(NULL, &tempp, 0, state); + } else { + result = (int) wcrtomb(target, source, state); + } + if (!isEILSEQ(result) && (result == 0)) + result = 1; + return (size_t) result; +} + +NCURSES_EXPORT(int) +NCURSES_SP_NAME(unget_wch) (NCURSES_SP_DCLx const wchar_t wch) +{ + int result = OK; + mbstate_t state; + size_t length; + int n; + + T((T_CALLED("unget_wch(%p, %#lx)"), (void *) SP_PARM, (unsigned long) wch)); + + init_mb(state); + length = _nc_wcrtomb(0, wch, &state); + + if (length != (size_t) (-1) + && length != 0) { + char *string; + + if ((string = (char *) malloc(length)) != 0) { + init_mb(state); + /* ignore the result, since we already validated the character */ + IGNORE_RC((int) wcrtomb(string, wch, &state)); + + for (n = (int) (length - 1); n >= 0; --n) { + if (NCURSES_SP_NAME(ungetch) (NCURSES_SP_ARGx + UChar(string[n])) !=OK) { + result = ERR; + break; + } + } + free(string); + } else { + result = ERR; + } + } else { + result = ERR; + } + + returnCode(result); +} + +#if NCURSES_SP_FUNCS +NCURSES_EXPORT(int) +unget_wch(const wchar_t wch) +{ + return NCURSES_SP_NAME(unget_wch) (CURRENT_SCREEN, wch); +} +#endif |