8 * ldisc.c: PuTTY line disciplines
11 static void c_write (char *buf, int len) {
12 from_backend(0, buf, len);
15 static void c_write1 (char c) {
19 static char *term_buf = NULL;
20 static int term_buflen = 0, term_bufsiz = 0, term_quotenext = 0;
22 static int plen(unsigned char c) {
23 if ((c >= 32 && c <= 126) ||
27 return 2; /* ^x for some x */
29 return 4; /* <XY> for hex XY */
32 static void pwrite(unsigned char c) {
33 if ((c >= 32 && c <= 126) ||
38 cc[1] = (c == 127 ? '?' : c + 0x40);
43 sprintf(cc, "<%02X>", c);
48 static void bsb(int n) {
50 c_write("\010 \010", 3);
53 #define CTRL(x) (x^'@')
55 static void term_send(char *buf, int len) {
59 switch (term_quotenext ? ' ' : c) {
61 * ^h/^?: delete one char and output one BSB
62 * ^w: delete, and output BSBs, to return to last space/nonspace
64 * ^u: delete, and output BSBs, to return to BOL
65 * ^c: Do a ^u then send a telnet IP
66 * ^z: Do a ^u then send a telnet SUSP
67 * ^\: Do a ^u then send a telnet ABORT
68 * ^r: echo "^R\n" and redraw line
70 * ^d: if at BOL, end of file and close connection, else send line
72 * ^m: send line-plus-\r\n and reset to BOL
74 case CTRL('H'): case CTRL('?'): /* backspace/delete */
75 if (term_buflen > 0) {
76 bsb(plen(term_buf[term_buflen-1]));
80 case CTRL('W'): /* delete word */
81 while (term_buflen > 0) {
82 bsb(plen(term_buf[term_buflen-1]));
84 if (term_buflen > 0 &&
85 isspace(term_buf[term_buflen-1]) &&
86 !isspace(term_buf[term_buflen]))
90 case CTRL('U'): /* delete line */
91 case CTRL('C'): /* Send IP */
92 case CTRL('\\'): /* Quit */
93 case CTRL('Z'): /* Suspend */
94 while (term_buflen > 0) {
95 bsb(plen(term_buf[term_buflen-1]));
98 back->special (TS_EL);
99 if( c == CTRL('C') ) back->special (TS_IP);
100 if( c == CTRL('Z') ) back->special (TS_SUSP);
101 if( c == CTRL('\\') ) back->special (TS_ABORT);
103 case CTRL('R'): /* redraw line */
104 c_write("^R\r\n", 4);
107 for (i = 0; i < term_buflen; i++)
111 case CTRL('V'): /* quote next char */
112 term_quotenext = TRUE;
114 case CTRL('D'): /* logout or send */
115 if (term_buflen == 0) {
116 back->special (TS_EOF);
118 back->send(term_buf, term_buflen);
122 case CTRL('M'): /* send with newline */
124 back->send(term_buf, term_buflen);
125 if (cfg.protocol == PROT_RAW)
126 back->send("\r\n", 2);
132 default: /* get to this label from ^V handler */
133 if (term_buflen >= term_bufsiz) {
134 term_bufsiz = term_buflen + 256;
135 term_buf = saferealloc(term_buf, term_bufsiz);
137 term_buf[term_buflen++] = c;
139 term_quotenext = FALSE;
145 static void simple_send(char *buf, int len) {
146 if( term_buflen != 0 )
148 back->send(term_buf, term_buflen);
149 while (term_buflen > 0) {
150 bsb(plen(term_buf[term_buflen-1]));
155 back->send(buf, len);
158 Ldisc ldisc_term = { term_send };
159 Ldisc ldisc_simple = { simple_send };