+/*
+ * ldisc.c: PuTTY line discipline. Sits between the input coming
+ * from keypresses in the window, and the output channel leading to
+ * the back end. Implements echo and/or local line editing,
+ * depending on what's currently configured.
+ */
+
#include <windows.h>
#include <stdio.h>
#include <ctype.h>
#include "putty.h"
-/*
- * ldisc.c: PuTTY line disciplines
- */
+#define ECHOING (cfg.localecho == LD_YES || \
+ (cfg.localecho == LD_BACKEND && \
+ (back->ldisc(LD_ECHO) || term_ldisc(LD_ECHO))))
+#define EDITING (cfg.localedit == LD_YES || \
+ (cfg.localedit == LD_BACKEND && \
+ (back->ldisc(LD_EDIT) || term_ldisc(LD_EDIT))))
-static void c_write (char *buf, int len) {
- while (len--) {
- int new_head = (inbuf_head + 1) & INBUF_MASK;
- if (new_head != inbuf_reap) {
- inbuf[inbuf_head] = *buf++;
- inbuf_head = new_head;
- }
- }
+static void c_write(char *buf, int len)
+{
+ from_backend(0, buf, len);
}
static char *term_buf = NULL;
static int term_buflen = 0, term_bufsiz = 0, term_quotenext = 0;
-static int plen(unsigned char c) {
- if ((c >= 32 && c <= 126) ||
- (c >= 160))
- return 1;
+static int plen(unsigned char c)
+{
+ if ((c >= 32 && c <= 126) || (c >= 160))
+ return 1;
else if (c < 128)
- return 2; /* ^x for some x */
+ return 2; /* ^x for some x */
else
- return 4; /* <XY> for hex XY */
+ return 4; /* <XY> for hex XY */
}
-static void pwrite(unsigned char c) {
- if ((c >= 32 && c <= 126) ||
- (c >= 160)) {
- char cc = (char)c;
- c_write(&cc, 1);
+static void pwrite(unsigned char c)
+{
+ if ((c >= 32 && c <= 126) || (c >= 160)) {
+ c_write(&c, 1);
} else if (c < 128) {
- char cc[2];
- cc[1] = (c == 127 ? '?' : c + 0x40);
- cc[0] = '^';
- c_write(cc, 2);
+ char cc[2];
+ cc[1] = (c == 127 ? '?' : c + 0x40);
+ cc[0] = '^';
+ c_write(cc, 2);
} else {
- char cc[5];
- sprintf(cc, "<%02X>", c);
- c_write(cc, 4);
+ char cc[5];
+ sprintf(cc, "<%02X>", c);
+ c_write(cc, 4);
}
}
-static void bsb(int n) {
+static void bsb(int n)
+{
while (n--)
c_write("\010 \010", 3);
}
-static void term_send(char *buf, int len) {
- while (len--) {
- char c;
- c = *buf++;
- switch (term_quotenext ? ' ' : c) {
- /*
- * ^h/^?: delete one char and output one BSB
- * ^w: delete, and output BSBs, to return to last space/nonspace
- * boundary
- * ^u: delete, and output BSBs, to return to BOL
- * ^r: echo "^R\n" and redraw line
- * ^v: quote next char
- * ^d: if at BOL, end of file and close connection, else send line
- * and reset to BOL
- * ^m/^j: send line-plus-\r\n and reset to BOL
- */
- case 8: case 127: /* backspace/delete */
- if (term_buflen > 0) {
- bsb(plen(term_buf[term_buflen-1]));
- term_buflen--;
- }
- break;
- case 23: /* ^W delete word */
- while (term_buflen > 0) {
- bsb(plen(term_buf[term_buflen-1]));
- term_buflen--;
- if (term_buflen > 0 &&
- isspace(term_buf[term_buflen-1]) &&
- !isspace(term_buf[term_buflen]))
- break;
- }
- break;
- case 21: /* ^U delete line */
- while (term_buflen > 0) {
- bsb(plen(term_buf[term_buflen-1]));
- term_buflen--;
- }
- break;
- case 18: /* ^R redraw line */
- c_write("^R\r\n", 4);
- {
- int i;
- for (i = 0; i < term_buflen; i++)
- pwrite(term_buf[i]);
- }
- break;
- case 22: /* ^V quote next char */
- term_quotenext = TRUE;
- break;
- case 4: /* ^D logout or send */
- if (term_buflen == 0) {
- /* FIXME: eof */;
- } else {
- back->send(term_buf, term_buflen);
+#define CTRL(x) (x^'@')
+
+void ldisc_send(char *buf, int len)
+{
+ /*
+ * Called with len=0 when the options change. We must inform
+ * the front end in case it needs to know.
+ */
+ if (len == 0) {
+ void ldisc_update(int echo, int edit);
+ ldisc_update(ECHOING, EDITING);
+ }
+ /*
+ * Either perform local editing, or just send characters.
+ */
+ if (EDITING) {
+ while (len--) {
+ char c;
+ c = *buf++;
+ switch (term_quotenext ? ' ' : c) {
+ /*
+ * ^h/^?: delete one char and output one BSB
+ * ^w: delete, and output BSBs, to return to last
+ * space/nonspace boundary
+ * ^u: delete, and output BSBs, to return to BOL
+ * ^c: Do a ^u then send a telnet IP
+ * ^z: Do a ^u then send a telnet SUSP
+ * ^\: Do a ^u then send a telnet ABORT
+ * ^r: echo "^R\n" and redraw line
+ * ^v: quote next char
+ * ^d: if at BOL, end of file and close connection,
+ * else send line and reset to BOL
+ * ^m: send line-plus-\r\n and reset to BOL
+ */
+ case CTRL('H'):
+ case CTRL('?'): /* backspace/delete */
+ if (term_buflen > 0) {
+ if (ECHOING)
+ bsb(plen(term_buf[term_buflen - 1]));
+ term_buflen--;
+ }
+ break;
+ case CTRL('W'): /* delete word */
+ while (term_buflen > 0) {
+ if (ECHOING)
+ bsb(plen(term_buf[term_buflen - 1]));
+ term_buflen--;
+ if (term_buflen > 0 &&
+ isspace(term_buf[term_buflen - 1]) &&
+ !isspace(term_buf[term_buflen]))
+ break;
+ }
+ break;
+ case CTRL('U'): /* delete line */
+ case CTRL('C'): /* Send IP */
+ case CTRL('\\'): /* Quit */
+ case CTRL('Z'): /* Suspend */
+ while (term_buflen > 0) {
+ if (ECHOING)
+ bsb(plen(term_buf[term_buflen - 1]));
+ term_buflen--;
+ }
+ back->special(TS_EL);
+ if (c == CTRL('C'))
+ back->special(TS_IP);
+ if (c == CTRL('Z'))
+ back->special(TS_SUSP);
+ if (c == CTRL('\\'))
+ back->special(TS_ABORT);
+ break;
+ case CTRL('R'): /* redraw line */
+ if (ECHOING) {
+ int i;
+ c_write("^R\r\n", 4);
+ for (i = 0; i < term_buflen; i++)
+ pwrite(term_buf[i]);
+ }
+ break;
+ case CTRL('V'): /* quote next char */
+ term_quotenext = TRUE;
+ break;
+ case CTRL('D'): /* logout or send */
+ if (term_buflen == 0) {
+ back->special(TS_EOF);
+ } else {
+ back->send(term_buf, term_buflen);
+ term_buflen = 0;
+ }
+ break;
+ case CTRL('M'): /* send with newline */
+ if (term_buflen > 0)
+ back->send(term_buf, term_buflen);
+ if (cfg.protocol == PROT_RAW)
+ back->send("\r\n", 2);
+ else
+ back->send("\r", 1);
+ if (ECHOING)
+ c_write("\r\n", 2);
term_buflen = 0;
+ break;
+ default: /* get to this label from ^V handler */
+ if (term_buflen >= term_bufsiz) {
+ term_bufsiz = term_buflen + 256;
+ term_buf = saferealloc(term_buf, term_bufsiz);
+ }
+ term_buf[term_buflen++] = c;
+ if (ECHOING)
+ pwrite(c);
+ term_quotenext = FALSE;
+ break;
}
- break;
- case 13: case 10: /* ^M/^J send with newline */
+ }
+ } else {
+ if (term_buflen != 0) {
back->send(term_buf, term_buflen);
- back->send("\r\n", 2);
- c_write("\r\n", 2);
- term_buflen = 0;
- break;
- default: /* get to this label from ^V handler */
- if (term_buflen >= term_bufsiz) {
- term_bufsiz = term_buflen + 256;
- term_buf = saferealloc(term_buf, term_bufsiz);
+ while (term_buflen > 0) {
+ bsb(plen(term_buf[term_buflen - 1]));
+ term_buflen--;
}
- term_buf[term_buflen++] = c;
- pwrite(c);
- term_quotenext = FALSE;
- break;
+ }
+ if (len > 0) {
+ if (ECHOING)
+ c_write(buf, len);
+ back->send(buf, len);
}
}
}
-
-static void simple_send(char *buf, int len) {
- back->send(buf, len);
-}
-
-Ldisc ldisc_term = { term_send };
-Ldisc ldisc_simple = { simple_send };
projects / u / mdw / putty / blobdiff