4f1b913a559dcf576a9d59fed7635296e7427877
8 * ldisc.c: PuTTY line disciplines
11 static void c_write (char *buf
, int len
) {
13 int new_head
= (inbuf_head
+ 1) & INBUF_MASK
;
14 if (new_head
!= inbuf_reap
) {
15 inbuf
[inbuf_head
] = *buf
++;
16 inbuf_head
= new_head
;
21 static char *term_buf
= NULL
;
22 static int term_buflen
= 0, term_bufsiz
= 0, term_quotenext
= 0;
24 static int plen(unsigned char c
) {
25 if ((c
>= 32 && c
<= 126) ||
29 return 2; /* ^x for some x */
31 return 4; /* <XY> for hex XY */
34 static void pwrite(unsigned char c
) {
35 if ((c
>= 32 && c
<= 126) ||
41 cc
[1] = (c
== 127 ?
'?' : c
+ 0x40);
46 sprintf(cc
, "<%02X>", c
);
51 static void bsb(int n
) {
53 c_write("\010 \010", 3);
56 #define CTRL(x) (x^'@')
58 static void term_send(char *buf
, int len
) {
62 switch (term_quotenext ?
' ' : c
) {
64 * ^h/^?: delete one char and output one BSB
65 * ^w: delete, and output BSBs, to return to last space/nonspace
67 * ^u: delete, and output BSBs, to return to BOL
68 * ^c: Do a ^u then send a telnet IP
69 * ^z: Do a ^u then send a telnet SUSP
70 * ^\: Do a ^u then send a telnet ABORT
71 * ^r: echo "^R\n" and redraw line
73 * ^d: if at BOL, end of file and close connection, else send line
75 * ^m: send line-plus-\r\n and reset to BOL
77 case CTRL('H'): case CTRL('?'): /* backspace/delete */
78 if (term_buflen
> 0) {
79 bsb(plen(term_buf
[term_buflen
-1]));
83 case CTRL('W'): /* delete word */
84 while (term_buflen
> 0) {
85 bsb(plen(term_buf
[term_buflen
-1]));
87 if (term_buflen
> 0 &&
88 isspace(term_buf
[term_buflen
-1]) &&
89 !isspace(term_buf
[term_buflen
]))
93 case CTRL('U'): /* delete line */
94 case CTRL('C'): /* Send IP */
95 case CTRL('\\'): /* Quit */
96 case CTRL('Z'): /* Suspend */
97 while (term_buflen
> 0) {
98 bsb(plen(term_buf
[term_buflen
-1]));
101 if( c
== CTRL('C') ) back
->special (TS_IP
);
102 if( c
== CTRL('Z') ) back
->special (TS_SUSP
);
103 if( c
== CTRL('\\') ) back
->special (TS_ABORT
);
105 case CTRL('R'): /* redraw line */
106 c_write("^R\r\n", 4);
109 for (i
= 0; i
< term_buflen
; i
++)
113 case CTRL('V'): /* quote next char */
114 term_quotenext
= TRUE
;
116 case CTRL('D'): /* logout or send */
117 if (term_buflen
== 0) {
118 back
->special (TS_EOF
);
120 back
->send(term_buf
, term_buflen
);
124 case CTRL('M'): /* send with newline */
125 back
->send(term_buf
, term_buflen
);
126 back
->send("\r\n", 2);
130 default: /* get to this label from ^V handler */
131 if (term_buflen
>= term_bufsiz
) {
132 term_bufsiz
= term_buflen
+ 256;
133 term_buf
= saferealloc(term_buf
, term_bufsiz
);
135 term_buf
[term_buflen
++] = c
;
137 term_quotenext
= FALSE
;
143 static void simple_send(char *buf
, int len
) {
144 if( term_buflen
!= 0 )
146 back
->send(term_buf
, term_buflen
);
147 while (term_buflen
> 0) {
148 bsb(plen(term_buf
[term_buflen
-1]));
152 back
->send(buf
, len
);
155 Ldisc ldisc_term
= { term_send
};
156 Ldisc ldisc_simple
= { simple_send
};