1 /****************************************************************************
2 * Copyright 2019,2020 Thomas E. Dickey *
3 * Copyright 2001-2016,2017 Free Software Foundation, Inc. *
4 * *
5 * Permission is hereby granted, free of charge, to any person obtaining a *
6 * copy of this software and associated documentation files (the *
7 * "Software"), to deal in the Software without restriction, including *
8 * without limitation the rights to use, copy, modify, merge, publish, *
9 * distribute, distribute with modifications, sublicense, and/or sell *
10 * copies of the Software, and to permit persons to whom the Software is *
11 * furnished to do so, subject to the following conditions: *
12 * *
13 * The above copyright notice and this permission notice shall be included *
14 * in all copies or substantial portions of the Software. *
15 * *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * *
24 * Except as contained in this notice, the name(s) of the above copyright *
25 * holders shall not be used in advertising or otherwise to promote the *
26 * sale, use or other dealings in this Software without prior written *
27 * authorization. *
28 ****************************************************************************/
29
30 /*
31 ** lib_cchar.c
32 **
33 ** The routines setcchar() and getcchar().
34 **
35 */
36
37 #include <curses.priv.h>
38
39 MODULE_ID("$Id: lib_cchar.c,v 1.33 2020/02/02 23:34:34 tom Exp $")
40
41 /*
42 * The SuSv2 description leaves some room for interpretation. We'll assume wch
43 * points to a string which is L'\0' terminated, contains at least one
44 * character with strictly positive width, which must be the first, and
45 * contains no characters of negative width.
46 */
NCURSES_EXPORT(int)47 NCURSES_EXPORT(int)
48 setcchar(cchar_t *wcval,
49 const wchar_t *wch,
50 const attr_t attrs,
51 NCURSES_PAIRS_T pair_arg,
52 const void *opts)
53 {
54 int code = OK;
55 int color_pair = pair_arg;
56 unsigned len;
57
58 TR(TRACE_CCALLS, (T_CALLED("setcchar(%p,%s,%lu,%d,%p)"),
59 (void *) wcval, _nc_viswbuf(wch),
60 (unsigned long) attrs, color_pair, opts));
61
62 set_extended_pair(opts, color_pair);
63 if (wch == NULL
64 || ((len = (unsigned) wcslen(wch)) > 1 && _nc_wacs_width(wch[0]) < 0)
65 || color_pair < 0) {
66 code = ERR;
67 } else {
68 unsigned i;
69
70 if (len > CCHARW_MAX)
71 len = CCHARW_MAX;
72
73 /*
74 * If we have a following spacing-character, stop at that point. We
75 * are only interested in adding non-spacing characters.
76 */
77 for (i = 1; i < len; ++i) {
78 if (_nc_wacs_width(wch[i]) != 0) {
79 len = i;
80 break;
81 }
82 }
83
84 memset(wcval, 0, sizeof(*wcval));
85
86 if (len != 0) {
87 SetAttr(*wcval, attrs);
88 SetPair(CHDEREF(wcval), color_pair);
89 memcpy(&wcval->chars, wch, len * sizeof(wchar_t));
90 TR(TRACE_CCALLS, ("copy %d wchars, first is %s", len,
91 _tracecchar_t(wcval)));
92 }
93 }
94
95 TR(TRACE_CCALLS, (T_RETURN("%d"), code));
96 return (code);
97 }
98
99 NCURSES_EXPORT(int)
getcchar(const cchar_t * wcval,wchar_t * wch,attr_t * attrs,NCURSES_PAIRS_T * pair_arg,void * opts)100 getcchar(const cchar_t *wcval,
101 wchar_t *wch,
102 attr_t *attrs,
103 NCURSES_PAIRS_T *pair_arg,
104 void *opts)
105 {
106 int code = ERR;
107 int color_pair;
108
109 TR(TRACE_CCALLS, (T_CALLED("getcchar(%p,%p,%p,%p,%p)"),
110 (const void *) wcval,
111 (void *) wch,
112 (void *) attrs,
113 (void *) pair_arg,
114 opts));
115
116 if (opts == NULL && wcval != NULL) {
117 wchar_t *wp;
118 int len;
119
120 len = ((wp = wmemchr(wcval->chars, L'\0', (size_t) CCHARW_MAX))
121 ? (int) (wp - wcval->chars)
122 : CCHARW_MAX);
123
124 if (wch == NULL) {
125 /*
126 * If the value is a null, set the length to 1.
127 * If the value is not a null, return the length plus 1 for null.
128 */
129 code = (len < CCHARW_MAX) ? (len + 1) : CCHARW_MAX;
130 } else if (attrs == 0 || pair_arg == 0) {
131 code = ERR;
132 } else if (len >= 0) {
133 *attrs = AttrOf(*wcval) & A_ATTRIBUTES;
134 color_pair = GetPair(*wcval);
135 get_extended_pair(opts, color_pair);
136 *pair_arg = limit_PAIRS(color_pair);
137 wmemcpy(wch, wcval->chars, (size_t) len);
138 wch[len] = L'\0';
139 if (*pair_arg >= 0)
140 code = OK;
141 }
142 }
143
144 TR(TRACE_CCALLS, (T_RETURN("%d"), code));
145 return (code);
146 }
147