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1 | #include <windows.h> |
2 | #include <stdio.h> |
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3 | #include <ctype.h> |
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4 | |
5 | #include "putty.h" |
6 | |
7 | /* |
8 | * ldisc.c: PuTTY line disciplines |
9 | */ |
10 | |
11 | static void c_write (char *buf, int len) { |
12 | while (len--) { |
13 | int new_head = (inbuf_head + 1) & INBUF_MASK; |
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14 | if (new_head != inbuf_reap) { |
15 | inbuf[inbuf_head] = *buf++; |
16 | inbuf_head = new_head; |
17 | } |
18 | } |
19 | } |
20 | |
21 | static char *term_buf = NULL; |
22 | static int term_buflen = 0, term_bufsiz = 0, term_quotenext = 0; |
23 | |
24 | static int plen(unsigned char c) { |
25 | if ((c >= 32 && c <= 126) || |
26 | (c >= 160)) |
27 | return 1; |
28 | else if (c < 128) |
29 | return 2; /* ^x for some x */ |
30 | else |
31 | return 4; /* <XY> for hex XY */ |
32 | } |
33 | |
34 | static void pwrite(unsigned char c) { |
35 | if ((c >= 32 && c <= 126) || |
36 | (c >= 160)) { |
37 | char cc = (char)c; |
38 | c_write(&cc, 1); |
39 | } else if (c < 128) { |
40 | char cc[2]; |
41 | cc[1] = (c == 127 ? '?' : c + 0x40); |
42 | cc[0] = '^'; |
43 | c_write(cc, 2); |
44 | } else { |
45 | char cc[5]; |
46 | sprintf(cc, "<%02X>", c); |
47 | c_write(cc, 4); |
48 | } |
49 | } |
50 | |
51 | static void bsb(int n) { |
52 | while (n--) |
53 | c_write("\010 \010", 3); |
54 | } |
55 | |
56 | static void term_send(char *buf, int len) { |
57 | while (len--) { |
58 | char c; |
59 | c = *buf++; |
60 | switch (term_quotenext ? ' ' : c) { |
61 | /* |
62 | * ^h/^?: delete one char and output one BSB |
63 | * ^w: delete, and output BSBs, to return to last space/nonspace |
64 | * boundary |
65 | * ^u: delete, and output BSBs, to return to BOL |
66 | * ^r: echo "^R\n" and redraw line |
67 | * ^v: quote next char |
68 | * ^d: if at BOL, end of file and close connection, else send line |
69 | * and reset to BOL |
70 | * ^m/^j: send line-plus-\r\n and reset to BOL |
71 | */ |
72 | case 8: case 127: /* backspace/delete */ |
73 | if (term_buflen > 0) { |
74 | bsb(plen(term_buf[term_buflen-1])); |
75 | term_buflen--; |
76 | } |
77 | break; |
78 | case 23: /* ^W delete word */ |
79 | while (term_buflen > 0) { |
80 | bsb(plen(term_buf[term_buflen-1])); |
81 | term_buflen--; |
82 | if (term_buflen > 0 && |
83 | isspace(term_buf[term_buflen-1]) && |
84 | !isspace(term_buf[term_buflen])) |
85 | break; |
86 | } |
87 | break; |
88 | case 21: /* ^U delete line */ |
89 | while (term_buflen > 0) { |
90 | bsb(plen(term_buf[term_buflen-1])); |
91 | term_buflen--; |
92 | } |
93 | break; |
94 | case 18: /* ^R redraw line */ |
95 | c_write("^R\r\n", 4); |
96 | { |
97 | int i; |
98 | for (i = 0; i < term_buflen; i++) |
99 | pwrite(term_buf[i]); |
100 | } |
101 | break; |
102 | case 22: /* ^V quote next char */ |
103 | term_quotenext = TRUE; |
104 | break; |
105 | case 4: /* ^D logout or send */ |
106 | if (term_buflen == 0) { |
107 | /* FIXME: eof */; |
108 | } else { |
109 | back->send(term_buf, term_buflen); |
110 | term_buflen = 0; |
111 | } |
112 | break; |
113 | case 13: case 10: /* ^M/^J send with newline */ |
114 | back->send(term_buf, term_buflen); |
115 | back->send("\r\n", 2); |
116 | c_write("\r\n", 2); |
117 | term_buflen = 0; |
118 | break; |
119 | default: /* get to this label from ^V handler */ |
120 | if (term_buflen >= term_bufsiz) { |
121 | term_bufsiz = term_buflen + 256; |
122 | term_buf = saferealloc(term_buf, term_bufsiz); |
123 | } |
124 | term_buf[term_buflen++] = c; |
125 | pwrite(c); |
126 | term_quotenext = FALSE; |
127 | break; |
128 | } |
129 | } |
130 | } |
131 | |
132 | static void simple_send(char *buf, int len) { |
133 | back->send(buf, len); |
134 | } |
135 | |
136 | Ldisc ldisc_term = { term_send }; |
137 | Ldisc ldisc_simple = { simple_send }; |