74cea548 |
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; |
3d88e64d |
29 | widebuffer = snewn(widesize, wchar_t); |
74cea548 |
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; |
3d88e64d |
47 | linebuffer = snewn(linesize, char); |
74cea548 |
48 | |
49 | if (in_utf(ldisc->term)) { |
50 | /* UTF is a simple algorithm */ |
51 | for (p = linebuffer, i = 0; i < len; i++) { |
61ef0c16 |
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 | } |
74cea548 |
70 | |
71 | if (ch < 0x80) { |
72 | *p++ = (char) (ch); |
73 | } else if (ch < 0x800) { |
806c9d94 |
74 | *p++ = (char) (0xC0 | (ch >> 6)); |
75 | *p++ = (char) (0x80 | (ch & 0x3F)); |
61ef0c16 |
76 | } else if (ch < 0x10000) { |
806c9d94 |
77 | *p++ = (char) (0xE0 | (ch >> 12)); |
78 | *p++ = (char) (0x80 | ((ch >> 6) & 0x3F)); |
79 | *p++ = (char) (0x80 | (ch & 0x3F)); |
61ef0c16 |
80 | } else { |
806c9d94 |
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)); |
74cea548 |
85 | } |
86 | } |
87 | } else { |
88 | int rv; |
21d2b241 |
89 | rv = wc_to_mb(ldisc->term->ucsdata->line_codepage, 0, widebuf, len, |
90 | linebuffer, linesize, NULL, NULL, ldisc->term->ucsdata); |
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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 | } |