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28
29 /*
30 ** lib_cchar.c
31 **
32 ** The routines setcchar() and getcchar().
33 **
34 */
35
36 #include <curses.priv.h>
37
38 MODULE_ID("$Id: lib_cchar.c,v 1.11 2005/01/29 21:29:16 tom Exp $")
39
40 /*
41 * The SuSv2 description leaves some room for interpretation. We'll assume wch
42 * points to a string which is L'\0' terminated, contains at least one
43 * character with strictly positive width, which must be the first, and
44 * contains no characters of negative width.
45 */
NCURSES_EXPORT(int)46 NCURSES_EXPORT(int)
47 setcchar(cchar_t *wcval,
48 const wchar_t *wch,
49 const attr_t attrs,
50 short color_pair,
51 const void *opts)
52 {
53 int i;
54 int len;
55 int code = OK;
56
57 TR(TRACE_CCALLS, (T_CALLED("setcchar(%p,%s,%ld,%d,%p)"),
58 wcval, _nc_viswbuf(wch), attrs, color_pair, opts));
59
60 len = wcslen(wch);
61 if (opts != NULL
62 || (len > 1 && wcwidth(wch[0]) < 0)) {
63 code = ERR;
64 } else {
65 if (len > CCHARW_MAX)
66 len = CCHARW_MAX;
67
68 /*
69 * If we have a following spacing-character, stop at that point. We
70 * are only interested in adding non-spacing characters.
71 */
72 for (i = 1; i < len; ++i) {
73 if (wcwidth(wch[i]) != 0) {
74 len = i;
75 break;
76 }
77 }
78
79 memset(wcval, 0, sizeof(*wcval));
80
81 if (len != 0) {
82 SetAttr(*wcval, attrs | COLOR_PAIR(color_pair));
83 SetPair(CHDEREF(wcval), color_pair);
84 memcpy(&wcval->chars, wch, len * sizeof(wchar_t));
85 TR(TRACE_CCALLS, ("copy %d wchars, first is %s", len,
86 _tracecchar_t(wcval)));
87 }
88 }
89
90 TR(TRACE_CCALLS, (T_RETURN("%d"), code));
91 return (code);
92 }
93
94 NCURSES_EXPORT(int)
getcchar(const cchar_t * wcval,wchar_t * wch,attr_t * attrs,short * color_pair,void * opts)95 getcchar(const cchar_t *wcval,
96 wchar_t *wch,
97 attr_t *attrs,
98 short *color_pair,
99 void *opts)
100 {
101 wchar_t *wp;
102 int len;
103 int code = ERR;
104
105 TR(TRACE_CCALLS, (T_CALLED("getcchar(%p,%p,%p,%p,%p)"),
106 wcval, wch, attrs, color_pair, opts));
107
108 if (opts == NULL) {
109 len = (wp = wmemchr(wcval->chars, L'\0', CCHARW_MAX))
110 ? wp - wcval->chars
111 : CCHARW_MAX;
112
113 if (wch == NULL) {
114 code = len;
115 } else if (attrs == 0 || color_pair == 0) {
116 code = ERR;
117 } else if (len >= 0) {
118 *attrs = AttrOf(*wcval) & A_ATTRIBUTES;
119 *color_pair = GetPair(*wcval);
120 wmemcpy(wch, wcval->chars, (unsigned) len);
121 wch[len] = L'\0';
122 code = OK;
123 }
124 }
125
126 TR(TRACE_CCALLS, (T_RETURN("%d"), code));
127 return (code);
128 }
129