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