447 lines
11 KiB
C
447 lines
11 KiB
C
/*-
|
|
* Copyright (c) 1992, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Christos Zoulas of Cornell University.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#if !defined(lint) && !defined(SCCSID)
|
|
static char sccsid[] = "@(#)read.c 8.1 (Berkeley) 6/4/93";
|
|
|
|
#endif /* not lint && not SCCSID */
|
|
/*
|
|
* read.c: Clean this junk up! This is horrible code.
|
|
* Terminal read functions
|
|
*/
|
|
#include "sys.h"
|
|
#include <sys/errno.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
extern int errno;
|
|
#include "el.h"
|
|
|
|
#define OKCMD -1
|
|
|
|
private int read__fixio __P((int, int));
|
|
private int read_preread __P((EditLine *));
|
|
private int read_getcmd __P((EditLine *, el_action_t *, char *));
|
|
|
|
#ifdef DEBUG_EDIT
|
|
private void
|
|
read_debug(el)
|
|
EditLine *el;
|
|
{
|
|
|
|
if (el->el_line.cursor > el->el_line.lastchar)
|
|
(void) fprintf(el->el_errfile, "cursor > lastchar\r\n");
|
|
if (el->el_line.cursor < el->el_line.buffer)
|
|
(void) fprintf(el->el_errfile, "cursor < buffer\r\n");
|
|
if (el->el_line.cursor > el->el_line.limit)
|
|
(void) fprintf(el->el_errfile, "cursor > limit\r\n");
|
|
if (el->el_line.lastchar > el->el_line.limit)
|
|
(void) fprintf(el->el_errfile, "lastchar > limit\r\n");
|
|
if (el->el_line.limit != &el->el_line.buffer[EL_BUFSIZ - 2])
|
|
(void) fprintf(el->el_errfile, "limit != &buffer[EL_BUFSIZ-2]\r\n");
|
|
}
|
|
#endif /* DEBUG_EDIT */
|
|
|
|
/* read__fixio():
|
|
* Try to recover from a read error
|
|
*/
|
|
private int
|
|
read__fixio(fd, e)
|
|
int fd, e;
|
|
{
|
|
switch (e) {
|
|
case -1: /* Make sure that the code is reachable */
|
|
|
|
#ifdef EWOULDBLOCK
|
|
case EWOULDBLOCK:
|
|
# ifndef TRY_AGAIN
|
|
# define TRY_AGAIN
|
|
# endif
|
|
#endif /* EWOULDBLOCK */
|
|
|
|
#if defined(POSIX) && defined(EAGAIN)
|
|
# if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN
|
|
case EAGAIN:
|
|
# ifndef TRY_AGAIN
|
|
# define TRY_AGAIN
|
|
# endif
|
|
# endif /* EWOULDBLOCK && EWOULDBLOCK != EAGAIN */
|
|
#endif /* POSIX && EAGAIN */
|
|
|
|
e = 0;
|
|
#ifdef TRY_AGAIN
|
|
# if defined(F_SETFL) && defined(O_NDELAY)
|
|
if ((e = fcntl(fd, F_GETFL, 0)) == -1)
|
|
return -1;
|
|
|
|
if (fcntl(fd, F_SETFL, e & ~O_NDELAY) == -1)
|
|
return -1;
|
|
else
|
|
e = 1;
|
|
# endif /* F_SETFL && O_NDELAY */
|
|
|
|
# ifdef FIONBIO
|
|
if (ioctl(fd, FIONBIO, (ioctl_t) &e) == -1)
|
|
return -1;
|
|
else
|
|
e = 1;
|
|
# endif /* FIONBIO */
|
|
|
|
#endif /* TRY_AGAIN */
|
|
return e ? 0 : -1;
|
|
|
|
case EINTR:
|
|
return 0;
|
|
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
|
|
/* read_preread():
|
|
* Try to read the stuff in the input queue;
|
|
*/
|
|
private int
|
|
read_preread(el)
|
|
EditLine *el;
|
|
{
|
|
int chrs = 0;
|
|
|
|
if (el->el_chared.c_macro.nline) {
|
|
el_free((ptr_t) el->el_chared.c_macro.nline);
|
|
el->el_chared.c_macro.nline = NULL;
|
|
}
|
|
|
|
if (el->el_tty.t_mode == ED_IO)
|
|
return 0;
|
|
|
|
#ifdef FIONREAD
|
|
(void) ioctl(el->el_infd, FIONREAD, (ioctl_t) &chrs);
|
|
if (chrs > 0) {
|
|
char buf[EL_BUFSIZ];
|
|
|
|
chrs = read(el->el_infd, buf, (size_t) MIN(chrs, EL_BUFSIZ - 1));
|
|
if (chrs > 0) {
|
|
buf[chrs] = '\0';
|
|
el->el_chared.c_macro.nline = strdup(buf);
|
|
el_push(el->el_chared.c_macro.nline);
|
|
}
|
|
}
|
|
#endif /* FIONREAD */
|
|
|
|
return chrs > 0;
|
|
}
|
|
|
|
|
|
/* el_push():
|
|
* Push a macro
|
|
*/
|
|
public void
|
|
el_push(el, str)
|
|
EditLine *el;
|
|
const char *str;
|
|
{
|
|
c_macro_t *ma = &el->el_chared.c_macro;
|
|
|
|
if (str != NULL && ma->level + 1 < EL_MAXMACRO) {
|
|
ma->level++;
|
|
ma->macro[ma->level] = (char *) str;
|
|
}
|
|
else {
|
|
term_beep(el);
|
|
term__flush();
|
|
}
|
|
}
|
|
|
|
|
|
/* read_getcmd():
|
|
* Return next command from the input stream.
|
|
*/
|
|
private int
|
|
read_getcmd(el, cmdnum, ch)
|
|
EditLine *el;
|
|
el_action_t *cmdnum;
|
|
char *ch;
|
|
{
|
|
el_action_t cmd = ED_UNASSIGNED;
|
|
int num;
|
|
|
|
while (cmd == ED_UNASSIGNED || cmd == ED_SEQUENCE_LEAD_IN) {
|
|
if ((num = el_getc(el, ch)) != 1) /* if EOF or error */
|
|
return num;
|
|
|
|
#ifdef KANJI
|
|
if ((*ch & 0200)) {
|
|
el->el_state.metanext = 0;
|
|
cmd = CcViMap[' '];
|
|
break;
|
|
}
|
|
else
|
|
#endif /* KANJI */
|
|
|
|
if (el->el_state.metanext) {
|
|
el->el_state.metanext = 0;
|
|
*ch |= 0200;
|
|
}
|
|
cmd = el->el_map.current[(unsigned char) *ch];
|
|
if (cmd == ED_SEQUENCE_LEAD_IN) {
|
|
key_value_t val;
|
|
switch (key_get(el, ch, &val)) {
|
|
case XK_CMD:
|
|
cmd = val.cmd;
|
|
break;
|
|
case XK_STR:
|
|
el_push(el, val.str);
|
|
break;
|
|
#ifdef notyet
|
|
case XK_EXE:
|
|
/* XXX: In the future to run a user function */
|
|
RunCommand(val.str);
|
|
break;
|
|
#endif
|
|
default:
|
|
abort();
|
|
break;
|
|
}
|
|
}
|
|
if (el->el_map.alt == NULL)
|
|
el->el_map.current = el->el_map.key;
|
|
}
|
|
*cmdnum = cmd;
|
|
return OKCMD;
|
|
}
|
|
|
|
|
|
/* el_getc():
|
|
* Read a character
|
|
*/
|
|
public int
|
|
el_getc(el, cp)
|
|
EditLine *el;
|
|
char *cp;
|
|
{
|
|
int num_read;
|
|
unsigned char tcp;
|
|
int tried = 0;
|
|
|
|
c_macro_t *ma = &el->el_chared.c_macro;
|
|
|
|
term__flush();
|
|
for (;;) {
|
|
if (ma->level < 0) {
|
|
if (!read_preread(el))
|
|
break;
|
|
}
|
|
if (ma->level < 0)
|
|
break;
|
|
|
|
if (*ma->macro[ma->level] == 0) {
|
|
ma->level--;
|
|
continue;
|
|
}
|
|
*cp = *ma->macro[ma->level]++ & 0377;
|
|
if (*ma->macro[ma->level] == 0) { /* Needed for QuoteMode On */
|
|
ma->level--;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
#ifdef DEBUG_READ
|
|
(void) fprintf(el->el_errfile, "Turning raw mode on\n");
|
|
#endif /* DEBUG_READ */
|
|
if (tty_rawmode(el) < 0) /* make sure the tty is set up correctly */
|
|
return 0;
|
|
|
|
#ifdef DEBUG_READ
|
|
(void) fprintf(el->el_errfile, "Reading a character\n");
|
|
#endif /* DEBUG_READ */
|
|
while ((num_read = read(el->el_infd, (char *) &tcp, 1)) == -1)
|
|
if (!tried && read__fixio(el->el_infd, errno) == 0)
|
|
tried = 1;
|
|
else {
|
|
*cp = '\0';
|
|
return -1;
|
|
}
|
|
#ifdef DEBUG_READ
|
|
(void) fprintf(el->el_errfile, "Got it %c\n", tcp);
|
|
#endif /* DEBUG_READ */
|
|
*cp = tcp;
|
|
return num_read;
|
|
}
|
|
|
|
|
|
|
|
public const char *
|
|
el_gets(el, nread)
|
|
EditLine *el;
|
|
int *nread;
|
|
{
|
|
int retval;
|
|
el_action_t cmdnum = 0;
|
|
int num; /* how many chars we have read at NL */
|
|
char ch;
|
|
|
|
if (el->el_flags & HANDLE_SIGNALS)
|
|
sig_set(el);
|
|
|
|
re_clear_display(el); /* reset the display stuff */
|
|
ch_reset(el);
|
|
|
|
#ifdef FIONREAD
|
|
if (el->el_tty.t_mode == EX_IO && ma->level < 0) {
|
|
long chrs = 0;
|
|
|
|
(void) ioctl(el->el_infd, FIONREAD, (ioctl_t) &chrs);
|
|
if (chrs == 0) {
|
|
if (tty_rawmode(el) < 0) {
|
|
if (nread)
|
|
*nread = 0;
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
#endif /* FIONREAD */
|
|
|
|
re_refresh(el); /* print the prompt */
|
|
|
|
for (num = OKCMD; num == OKCMD;) { /* while still editing this line */
|
|
#ifdef DEBUG_EDIT
|
|
read_debug(el);
|
|
#endif /* DEBUG_EDIT */
|
|
/* if EOF or error */
|
|
if ((num = read_getcmd(el, &cmdnum, &ch)) != OKCMD) {
|
|
#ifdef DEBUG_READ
|
|
(void) fprintf(el->el_errfile, "Returning from el_gets %d\n", num);
|
|
#endif /* DEBUG_READ */
|
|
break;
|
|
}
|
|
|
|
if (cmdnum >= el->el_map.nfunc) { /* BUG CHECK command */
|
|
#ifdef DEBUG_EDIT
|
|
(void) fprintf(el->el_errfile,
|
|
"ERROR: illegal command from key 0%o\r\n", ch);
|
|
#endif /* DEBUG_EDIT */
|
|
continue; /* try again */
|
|
}
|
|
|
|
/* now do the real command */
|
|
#ifdef DEBUG_READ
|
|
{
|
|
el_bindings_t *b;
|
|
for (b = el->el_map.help; b->name; b++)
|
|
if (b->func == cmdnum)
|
|
break;
|
|
if (b->name)
|
|
(void) fprintf(el->el_errfile, "Executing %s\n", b->name);
|
|
else
|
|
(void) fprintf(el->el_errfile, "Error command = %d\n", cmdnum);
|
|
}
|
|
#endif /* DEBUG_READ */
|
|
retval = (*el->el_map.func[cmdnum])(el, ch);
|
|
|
|
/* save the last command here */
|
|
el->el_state.lastcmd = cmdnum;
|
|
|
|
/* use any return value */
|
|
switch (retval) {
|
|
case CC_CURSOR:
|
|
el->el_state.argument = 1;
|
|
el->el_state.doingarg = 0;
|
|
re_refresh_cursor(el);
|
|
break;
|
|
|
|
case CC_REDISPLAY:
|
|
re_clear_lines(el);
|
|
re_clear_display(el);
|
|
/* FALLTHROUGH */
|
|
|
|
case CC_REFRESH:
|
|
el->el_state.argument = 1;
|
|
el->el_state.doingarg = 0;
|
|
re_refresh(el);
|
|
break;
|
|
|
|
case CC_NORM: /* normal char */
|
|
el->el_state.argument = 1;
|
|
el->el_state.doingarg = 0;
|
|
break;
|
|
|
|
case CC_ARGHACK: /* Suggested by Rich Salz */
|
|
/* <rsalz@pineapple.bbn.com> */
|
|
break; /* keep going... */
|
|
|
|
case CC_EOF: /* end of file typed */
|
|
num = 0;
|
|
break;
|
|
|
|
case CC_NEWLINE: /* normal end of line */
|
|
num = el->el_line.lastchar - el->el_line.buffer;
|
|
break;
|
|
|
|
case CC_FATAL: /* fatal error, reset to known state */
|
|
#ifdef DEBUG_READ
|
|
(void) fprintf(el->el_errfile, "*** editor fatal ERROR ***\r\n\n");
|
|
#endif /* DEBUG_READ */
|
|
/* put (real) cursor in a known place */
|
|
re_clear_display(el); /* reset the display stuff */
|
|
ch_reset(el); /* reset the input pointers */
|
|
re_refresh(el); /* print the prompt again */
|
|
el->el_state.argument = 1;
|
|
el->el_state.doingarg = 0;
|
|
break;
|
|
|
|
case CC_ERROR:
|
|
default: /* functions we don't know about */
|
|
#ifdef DEBUG_READ
|
|
(void) fprintf(el->el_errfile, "*** editor ERROR ***\r\n\n");
|
|
#endif /* DEBUG_READ */
|
|
el->el_state.argument = 1;
|
|
el->el_state.doingarg = 0;
|
|
term_beep(el);
|
|
term__flush();
|
|
break;
|
|
}
|
|
}
|
|
|
|
(void) tty_cookedmode(el); /* make sure the tty is set up correctly */
|
|
term__flush(); /* flush any buffered output */
|
|
if (el->el_flags & HANDLE_SIGNALS)
|
|
sig_clr(el);
|
|
if (nread)
|
|
*nread = num;
|
|
return num ? el->el_line.buffer : NULL;
|
|
}
|