2 * ldisc.c: PuTTY line discipline. Sits between the input coming
3 * from keypresses in the window, and the output channel leading to
4 * the back end. Implements echo and/or local line editing,
5 * depending on what's currently configured.
15 void lpage_send(void *handle,
16 int codepage, char *buf, int len, int interactive)
18 Ldisc ldisc = (Ldisc)handle;
19 wchar_t *widebuffer = 0;
24 ldisc_send(ldisc, buf, len, interactive);
29 widebuffer = snewn(widesize, wchar_t);
31 wclen = mb_to_wc(codepage, 0, buf, len, widebuffer, widesize);
32 luni_send(ldisc, widebuffer, wclen, interactive);
37 void luni_send(void *handle, wchar_t * widebuf, int len, int interactive)
39 Ldisc ldisc = (Ldisc)handle;
40 int ratio = (in_utf(ldisc->term))?3:1;
46 linesize = len * ratio * 2;
47 linebuffer = snewn(linesize, char);
49 if (in_utf(ldisc->term)) {
50 /* UTF is a simple algorithm */
51 for (p = linebuffer, i = 0; i < len; i++) {
52 unsigned long ch = widebuf[i];
54 if ((ch & 0xF800) == 0xD800) {
55 #ifdef PLATFORM_IS_UTF16
57 unsigned long ch2 = widebuf[i+1];
58 if ((ch & 0xFC00) == 0xD800 &&
59 (ch2 & 0xFC00) == 0xDC00) {
60 ch = 0x10000 + ((ch & 0x3FF) << 10) + (ch2 & 0x3FF);
66 /* Unrecognised UTF-16 sequence */
73 } else if (ch < 0x800) {
74 *p++ = (char) (0xC0 | (ch >> 6));
75 *p++ = (char) (0x80 | (ch & 0x3F));
76 } else if (ch < 0x10000) {
77 *p++ = (char) (0xE0 | (ch >> 12));
78 *p++ = (char) (0x80 | ((ch >> 6) & 0x3F));
79 *p++ = (char) (0x80 | (ch & 0x3F));
81 *p++ = (char) (0xF0 | (ch >> 18));
82 *p++ = (char) (0x80 | ((ch >> 12) & 0x3F));
83 *p++ = (char) (0x80 | ((ch >> 6) & 0x3F));
84 *p++ = (char) (0x80 | (ch & 0x3F));
89 rv = wc_to_mb(ldisc->term->ucsdata->line_codepage, 0, widebuf, len,
90 linebuffer, linesize, NULL, NULL, ldisc->term->ucsdata);
97 ldisc_send(ldisc, linebuffer, p - linebuffer, interactive);