| 1 | /* |
| 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. |
| 6 | */ |
| 7 | |
| 8 | #include <stdio.h> |
| 9 | #include <ctype.h> |
| 10 | |
| 11 | #include "putty.h" |
| 12 | #include "terminal.h" |
| 13 | #include "ldisc.h" |
| 14 | |
| 15 | void lpage_send(void *handle, |
| 16 | int codepage, char *buf, int len, int interactive) |
| 17 | { |
| 18 | Ldisc ldisc = (Ldisc)handle; |
| 19 | wchar_t *widebuffer = 0; |
| 20 | int widesize = 0; |
| 21 | int wclen; |
| 22 | |
| 23 | if (codepage < 0) { |
| 24 | ldisc_send(ldisc, buf, len, interactive); |
| 25 | return; |
| 26 | } |
| 27 | |
| 28 | widesize = len * 2; |
| 29 | widebuffer = snewn(widesize, wchar_t); |
| 30 | |
| 31 | wclen = mb_to_wc(codepage, 0, buf, len, widebuffer, widesize); |
| 32 | luni_send(ldisc, widebuffer, wclen, interactive); |
| 33 | |
| 34 | sfree(widebuffer); |
| 35 | } |
| 36 | |
| 37 | void luni_send(void *handle, wchar_t * widebuf, int len, int interactive) |
| 38 | { |
| 39 | Ldisc ldisc = (Ldisc)handle; |
| 40 | int ratio = (in_utf(ldisc->term))?3:1; |
| 41 | char *linebuffer; |
| 42 | int linesize; |
| 43 | int i; |
| 44 | char *p; |
| 45 | |
| 46 | linesize = len * ratio * 2; |
| 47 | linebuffer = snewn(linesize, char); |
| 48 | |
| 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]; |
| 53 | |
| 54 | if ((ch & 0xF800) == 0xD800) { |
| 55 | #ifdef PLATFORM_IS_UTF16 |
| 56 | if (i+1 < len) { |
| 57 | unsigned long ch2 = widebuf[i+1]; |
| 58 | if ((ch & 0xFC00) == 0xD800 && |
| 59 | (ch2 & 0xFC00) == 0xDC00) { |
| 60 | ch = 0x10000 + ((ch & 0x3FF) << 10) + (ch2 & 0x3FF); |
| 61 | i++; |
| 62 | } |
| 63 | } else |
| 64 | #endif |
| 65 | { |
| 66 | /* Unrecognised UTF-16 sequence */ |
| 67 | ch = '.'; |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | if (ch < 0x80) { |
| 72 | *p++ = (char) (ch); |
| 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)); |
| 80 | } else { |
| 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)); |
| 85 | } |
| 86 | } |
| 87 | } else { |
| 88 | int rv; |
| 89 | rv = wc_to_mb(ldisc->term->ucsdata->line_codepage, 0, widebuf, len, |
| 90 | linebuffer, linesize, NULL, NULL, ldisc->term->ucsdata); |
| 91 | if (rv >= 0) |
| 92 | p = linebuffer + rv; |
| 93 | else |
| 94 | p = linebuffer; |
| 95 | } |
| 96 | if (p > linebuffer) |
| 97 | ldisc_send(ldisc, linebuffer, p - linebuffer, interactive); |
| 98 | |
| 99 | sfree(linebuffer); |
| 100 | } |