8 * ldisc.c: PuTTY line disciplines
11 static void c_write (char *buf, int len) {
16 static char *term_buf = NULL;
17 static int term_buflen = 0, term_bufsiz = 0, term_quotenext = 0;
19 static int plen(unsigned char c) {
20 if ((c >= 32 && c <= 126) ||
24 return 2; /* ^x for some x */
26 return 4; /* <XY> for hex XY */
29 static void pwrite(unsigned char c) {
30 if ((c >= 32 && c <= 126) ||
35 cc[1] = (c == 127 ? '?' : c + 0x40);
40 sprintf(cc, "<%02X>", c);
45 static void bsb(int n) {
47 c_write("\010 \010", 3);
50 #define CTRL(x) (x^'@')
52 static void term_send(char *buf, int len) {
56 switch (term_quotenext ? ' ' : c) {
58 * ^h/^?: delete one char and output one BSB
59 * ^w: delete, and output BSBs, to return to last space/nonspace
61 * ^u: delete, and output BSBs, to return to BOL
62 * ^c: Do a ^u then send a telnet IP
63 * ^z: Do a ^u then send a telnet SUSP
64 * ^\: Do a ^u then send a telnet ABORT
65 * ^r: echo "^R\n" and redraw line
67 * ^d: if at BOL, end of file and close connection, else send line
69 * ^m: send line-plus-\r\n and reset to BOL
71 case CTRL('H'): case CTRL('?'): /* backspace/delete */
72 if (term_buflen > 0) {
73 bsb(plen(term_buf[term_buflen-1]));
77 case CTRL('W'): /* delete word */
78 while (term_buflen > 0) {
79 bsb(plen(term_buf[term_buflen-1]));
81 if (term_buflen > 0 &&
82 isspace(term_buf[term_buflen-1]) &&
83 !isspace(term_buf[term_buflen]))
87 case CTRL('U'): /* delete line */
88 case CTRL('C'): /* Send IP */
89 case CTRL('\\'): /* Quit */
90 case CTRL('Z'): /* Suspend */
91 while (term_buflen > 0) {
92 bsb(plen(term_buf[term_buflen-1]));
95 back->special (TS_EL);
96 if( c == CTRL('C') ) back->special (TS_IP);
97 if( c == CTRL('Z') ) back->special (TS_SUSP);
98 if( c == CTRL('\\') ) back->special (TS_ABORT);
100 case CTRL('R'): /* redraw line */
101 c_write("^R\r\n", 4);
104 for (i = 0; i < term_buflen; i++)
108 case CTRL('V'): /* quote next char */
109 term_quotenext = TRUE;
111 case CTRL('D'): /* logout or send */
112 if (term_buflen == 0) {
113 back->special (TS_EOF);
115 back->send(term_buf, term_buflen);
119 case CTRL('M'): /* send with newline */
121 back->send(term_buf, term_buflen);
122 if (cfg.protocol == PROT_RAW)
123 back->send("\r\n", 2);
129 default: /* get to this label from ^V handler */
130 if (term_buflen >= term_bufsiz) {
131 term_bufsiz = term_buflen + 256;
132 term_buf = saferealloc(term_buf, term_bufsiz);
134 term_buf[term_buflen++] = c;
136 term_quotenext = FALSE;
142 static void simple_send(char *buf, int len) {
143 if( term_buflen != 0 )
145 back->send(term_buf, term_buflen);
146 while (term_buflen > 0) {
147 bsb(plen(term_buf[term_buflen-1]));
152 back->send(buf, len);
155 Ldisc ldisc_term = { term_send };
156 Ldisc ldisc_simple = { simple_send };