15 * ldisc.c: PuTTY line disciplines
18 static void c_write (char *buf
, int len
) {
23 static char *term_buf
= NULL
;
24 static int term_buflen
= 0, term_bufsiz
= 0, term_quotenext
= 0;
26 static int plen(unsigned char c
) {
27 if ((c
>= 32 && c
<= 126) ||
31 return 2; /* ^x for some x */
33 return 4; /* <XY> for hex XY */
36 static void pwrite(unsigned char c
) {
37 if ((c
>= 32 && c
<= 126) ||
42 cc
[1] = (c
== 127 ?
'?' : c
+ 0x40);
47 sprintf(cc
, "<%02X>", c
);
52 static void bsb(int n
) {
54 c_write("\010 \010", 3);
57 #define CTRL(x) (x^'@')
59 static void term_send(char *buf
, int len
) {
63 switch (term_quotenext ?
' ' : c
) {
65 * ^h/^?: delete one char and output one BSB
66 * ^w: delete, and output BSBs, to return to last space/nonspace
68 * ^u: delete, and output BSBs, to return to BOL
69 * ^c: Do a ^u then send a telnet IP
70 * ^z: Do a ^u then send a telnet SUSP
71 * ^\: Do a ^u then send a telnet ABORT
72 * ^r: echo "^R\n" and redraw line
74 * ^d: if at BOL, end of file and close connection, else send line
76 * ^m: send line-plus-\r\n and reset to BOL
78 case CTRL('H'): case CTRL('?'): /* backspace/delete */
79 if (term_buflen
> 0) {
80 bsb(plen(term_buf
[term_buflen
-1]));
84 case CTRL('W'): /* delete word */
85 while (term_buflen
> 0) {
86 bsb(plen(term_buf
[term_buflen
-1]));
88 if (term_buflen
> 0 &&
89 isspace(term_buf
[term_buflen
-1]) &&
90 !isspace(term_buf
[term_buflen
]))
94 case CTRL('U'): /* delete line */
95 case CTRL('C'): /* Send IP */
96 case CTRL('\\'): /* Quit */
97 case CTRL('Z'): /* Suspend */
98 while (term_buflen
> 0) {
99 bsb(plen(term_buf
[term_buflen
-1]));
102 back
->special (TS_EL
);
103 if( c
== CTRL('C') ) back
->special (TS_IP
);
104 if( c
== CTRL('Z') ) back
->special (TS_SUSP
);
105 if( c
== CTRL('\\') ) back
->special (TS_ABORT
);
107 case CTRL('R'): /* redraw line */
108 c_write("^R\r\n", 4);
111 for (i
= 0; i
< term_buflen
; i
++)
115 case CTRL('V'): /* quote next char */
116 term_quotenext
= TRUE
;
118 case CTRL('D'): /* logout or send */
119 if (term_buflen
== 0) {
120 back
->special (TS_EOF
);
122 back
->send(term_buf
, term_buflen
);
126 case CTRL('M'): /* send with newline */
128 back
->send(term_buf
, term_buflen
);
129 if (cfg
.protocol
== PROT_RAW
)
130 back
->send("\r\n", 2);
136 default: /* get to this label from ^V handler */
137 if (term_buflen
>= term_bufsiz
) {
138 term_bufsiz
= term_buflen
+ 256;
139 term_buf
= saferealloc(term_buf
, term_bufsiz
);
141 term_buf
[term_buflen
++] = c
;
143 term_quotenext
= FALSE
;
149 static void simple_send(char *buf
, int len
) {
150 if( term_buflen
!= 0 )
152 back
->send(term_buf
, term_buflen
);
153 while (term_buflen
> 0) {
154 bsb(plen(term_buf
[term_buflen
-1]));
159 back
->send(buf
, len
);
162 Ldisc ldisc_term
= { term_send
};
163 Ldisc ldisc_simple
= { simple_send
};