X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/2c94fd1cbf32093be173ea6c4378caa109f73dd4..0965bee0865fd8ea129b2de62a3c50e09c59a184:/ldisc.c diff --git a/ldisc.c b/ldisc.c index 80659cca..1ab832dd 100644 --- a/ldisc.c +++ b/ldisc.c @@ -1,21 +1,27 @@ +/* + * 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 #include #include #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) { from_backend(0, buf, len); } -static void c_write1 (char c) { - c_write(&c, 1); -} - static char *term_buf = NULL; static int term_buflen = 0, term_bufsiz = 0, term_quotenext = 0; @@ -32,7 +38,7 @@ static int plen(unsigned char c) { static void pwrite(unsigned char c) { if ((c >= 32 && c <= 126) || (c >= 160)) { - c_write1(c); + c_write(&c, 1); } else if (c < 128) { char cc[2]; cc[1] = (c == 127 ? '?' : c + 0x40); @@ -52,108 +58,124 @@ static void bsb(int n) { #define CTRL(x) (x^'@') -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 - * ^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) { - bsb(plen(term_buf[term_buflen-1])); - term_buflen--; - } - break; - case CTRL('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 CTRL('U'): /* delete line */ - case CTRL('C'): /* Send IP */ - case CTRL('\\'): /* Quit */ - case CTRL('Z'): /* Suspend */ - while (term_buflen > 0) { - 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 */ - c_write("^R\r\n", 4); - { - int i; - 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); - 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; - pwrite(c); - term_quotenext = FALSE; - break; - } +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); } -} - -static void simple_send(char *buf, int len) { - if( term_buflen != 0 ) - { - back->send(term_buf, term_buflen); - while (term_buflen > 0) { - bsb(plen(term_buf[term_buflen-1])); - term_buflen--; - } + /* + * 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; + } + } + } else { + if( term_buflen != 0 ) + { + back->send(term_buf, term_buflen); + while (term_buflen > 0) { + bsb(plen(term_buf[term_buflen-1])); + term_buflen--; + } + } + if (len > 0) { + if (ECHOING) + c_write(buf, len); + back->send(buf, len); + } } - if (len > 0) - back->send(buf, len); } - -Ldisc ldisc_term = { term_send }; -Ldisc ldisc_simple = { simple_send };