diff options
Diffstat (limited to 'ncurses-5.9/ncurses/widechar/lib_cchar.c')
| -rw-r--r-- | ncurses-5.9/ncurses/widechar/lib_cchar.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/ncurses-5.9/ncurses/widechar/lib_cchar.c b/ncurses-5.9/ncurses/widechar/lib_cchar.c new file mode 100644 index 0000000..4d344e9 --- /dev/null +++ b/ncurses-5.9/ncurses/widechar/lib_cchar.c @@ -0,0 +1,137 @@ +/**************************************************************************** + * Copyright (c) 2001-2009,2010 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. * + ****************************************************************************/ + +/* +** lib_cchar.c +** +** The routines setcchar() and getcchar(). +** +*/ + +#include <curses.priv.h> + +MODULE_ID("$Id$") + +/* + * The SuSv2 description leaves some room for interpretation. We'll assume wch + * points to a string which is L'\0' terminated, contains at least one + * character with strictly positive width, which must be the first, and + * contains no characters of negative width. + */ +NCURSES_EXPORT(int) +setcchar(cchar_t *wcval, + const wchar_t *wch, + const attr_t attrs, + short color_pair, + const void *opts) +{ + unsigned i; + unsigned len; + int code = OK; + + TR(TRACE_CCALLS, (T_CALLED("setcchar(%p,%s,%lu,%d,%p)"), + (void *) wcval, _nc_viswbuf(wch), + (unsigned long) attrs, color_pair, opts)); + + len = (unsigned) wcslen(wch); + if (opts != NULL + || (len > 1 && wcwidth(wch[0]) < 0)) { + code = ERR; + } else { + if (len > CCHARW_MAX) + len = CCHARW_MAX; + + /* + * If we have a following spacing-character, stop at that point. We + * are only interested in adding non-spacing characters. + */ + for (i = 1; i < len; ++i) { + if (wcwidth(wch[i]) != 0) { + len = i; + break; + } + } + + memset(wcval, 0, sizeof(*wcval)); + + if (len != 0) { + SetAttr(*wcval, attrs | (attr_t) ColorPair(color_pair)); + SetPair(CHDEREF(wcval), color_pair); + memcpy(&wcval->chars, wch, len * sizeof(wchar_t)); + TR(TRACE_CCALLS, ("copy %d wchars, first is %s", len, + _tracecchar_t(wcval))); + } + } + + TR(TRACE_CCALLS, (T_RETURN("%d"), code)); + return (code); +} + +NCURSES_EXPORT(int) +getcchar(const cchar_t *wcval, + wchar_t *wch, + attr_t *attrs, + short *color_pair, + void *opts) +{ + wchar_t *wp; + int len; + int code = ERR; + + TR(TRACE_CCALLS, (T_CALLED("getcchar(%p,%p,%p,%p,%p)"), + (const void *) wcval, + (void *) wch, + (void *) attrs, + (void *) color_pair, + opts)); + + if (opts == NULL) { + len = ((wp = wmemchr(wcval->chars, L'\0', CCHARW_MAX)) + ? (int) (wp - wcval->chars) + : CCHARW_MAX); + + if (wch == NULL) { + /* + * If the value is a null, set the length to 1. + * If the value is not a null, return the length plus 1 for null. + */ + code = (len < CCHARW_MAX) ? (len + 1) : CCHARW_MAX; + } else if (attrs == 0 || color_pair == 0) { + code = ERR; + } else if (len >= 0) { + *attrs = AttrOf(*wcval) & A_ATTRIBUTES; + *color_pair = (short) GetPair(*wcval); + wmemcpy(wch, wcval->chars, (unsigned) len); + wch[len] = L'\0'; + code = OK; + } + } + + TR(TRACE_CCALLS, (T_RETURN("%d"), code)); + return (code); +} |