15 * ldisc.c: PuTTY line disciplines
18 static void c_write (char *buf
, int len
) {
19 from_backend(0, buf
, len
);
22 static void c_write1 (char c
) {
26 static char *term_buf
= NULL
;
27 static int term_buflen
= 0, term_bufsiz
= 0, term_quotenext
= 0;
29 static int plen(unsigned char c
) {
30 if ((c
>= 32 && c
<= 126) ||
34 return 2; /* ^x for some x */
36 return 4; /* <XY> for hex XY */
39 static void pwrite(unsigned char c
) {
40 if ((c
>= 32 && c
<= 126) ||
45 cc
[1] = (c
== 127 ?
'?' : c
+ 0x40);
50 sprintf(cc
, "<%02X>", c
);
55 static void bsb(int n
) {
57 c_write("\010 \010", 3);
60 #define CTRL(x) (x^'@')
62 static void term_send(char *buf
, int len
) {
66 switch (term_quotenext ?
' ' : c
) {
68 * ^h/^?: delete one char and output one BSB
69 * ^w: delete, and output BSBs, to return to last space/nonspace
71 * ^u: delete, and output BSBs, to return to BOL
72 * ^c: Do a ^u then send a telnet IP
73 * ^z: Do a ^u then send a telnet SUSP
74 * ^\: Do a ^u then send a telnet ABORT
75 * ^r: echo "^R\n" and redraw line
77 * ^d: if at BOL, end of file and close connection, else send line
79 * ^m: send line-plus-\r\n and reset to BOL
81 case CTRL('H'): case CTRL('?'): /* backspace/delete */
82 if (term_buflen
> 0) {
83 bsb(plen(term_buf
[term_buflen
-1]));
87 case CTRL('W'): /* delete word */
88 while (term_buflen
> 0) {
89 bsb(plen(term_buf
[term_buflen
-1]));
91 if (term_buflen
> 0 &&
92 isspace(term_buf
[term_buflen
-1]) &&
93 !isspace(term_buf
[term_buflen
]))
97 case CTRL('U'): /* delete line */
98 case CTRL('C'): /* Send IP */
99 case CTRL('\\'): /* Quit */
100 case CTRL('Z'): /* Suspend */
101 while (term_buflen
> 0) {
102 bsb(plen(term_buf
[term_buflen
-1]));
105 back
->special (TS_EL
);
106 if( c
== CTRL('C') ) back
->special (TS_IP
);
107 if( c
== CTRL('Z') ) back
->special (TS_SUSP
);
108 if( c
== CTRL('\\') ) back
->special (TS_ABORT
);
110 case CTRL('R'): /* redraw line */
111 c_write("^R\r\n", 4);
114 for (i
= 0; i
< term_buflen
; i
++)
118 case CTRL('V'): /* quote next char */
119 term_quotenext
= TRUE
;
121 case CTRL('D'): /* logout or send */
122 if (term_buflen
== 0) {
123 back
->special (TS_EOF
);
125 back
->send(term_buf
, term_buflen
);
129 case CTRL('M'): /* send with newline */
131 back
->send(term_buf
, term_buflen
);
132 if (cfg
.protocol
== PROT_RAW
)
133 back
->send("\r\n", 2);
139 default: /* get to this label from ^V handler */
140 if (term_buflen
>= term_bufsiz
) {
141 term_bufsiz
= term_buflen
+ 256;
142 term_buf
= saferealloc(term_buf
, term_bufsiz
);
144 term_buf
[term_buflen
++] = c
;
146 term_quotenext
= FALSE
;
152 static void simple_send(char *buf
, int len
) {
153 if( term_buflen
!= 0 )
155 back
->send(term_buf
, term_buflen
);
156 while (term_buflen
> 0) {
157 bsb(plen(term_buf
[term_buflen
-1]));
162 back
->send(buf
, len
);
165 Ldisc ldisc_term
= { term_send
};
166 Ldisc ldisc_simple
= { simple_send
};