#include "config.h"
#if !defined(lint) && !defined(SCCSID)
#if 0
static char sccsid[] = "@(#)read.c 8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: read.c,v 1.21 2002/03/18 16:00:57 christos Exp $");
#endif
#endif
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include "el.h"
#define OKCMD -1
private int read__fixio(int, int);
private int read_preread(EditLine *);
private int read_char(EditLine *, char *);
private int read_getcmd(EditLine *, el_action_t *, char *);
protected int
read_init(EditLine *el)
{
el->el_read.read_char = read_char;
return 0;
}
protected int
el_read_setfn(EditLine *el, el_rfunc_t rc)
{
el->el_read.read_char = (rc == EL_BUILTIN_GETCFN) ? read_char : rc;
return 0;
}
protected el_rfunc_t
el_read_getfn(EditLine *el)
{
return (el->el_read.read_char == read_char) ?
EL_BUILTIN_GETCFN : el->el_read.read_char;
}
#ifdef DEBUG_EDIT
private void
read_debug(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
private int
read__fixio(int fd, int e)
{
switch (e) {
case -1:
#ifdef EWOULDBLOCK
case EWOULDBLOCK:
#ifndef TRY_AGAIN
#define TRY_AGAIN
#endif
#endif
#if defined(POSIX) && defined(EAGAIN)
#if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN
case EAGAIN:
#ifndef TRY_AGAIN
#define TRY_AGAIN
#endif
#endif
#endif
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
#ifdef FIONBIO
{
int zero = 0;
if (ioctl(fd, FIONBIO, (ioctl_t) & zero) == -1)
return (-1);
else
e = 1;
}
#endif
#endif
return (e ? 0 : -1);
case EINTR:
return (0);
default:
return (-1);
}
}
private int
read_preread(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->el_chared.c_macro.nline);
}
}
#endif
return (chrs > 0);
}
public void
el_push(EditLine *el, 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] = str;
} else {
term_beep(el);
term__flush();
}
}
private int
read_getcmd(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)
return (num);
#ifdef KANJI
if ((*ch & 0200)) {
el->el_state.metanext = 0;
cmd = CcViMap[' '];
break;
} else
#endif
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:
RunCommand(val.str);
break;
#endif
default:
EL_ABORT((el->el_errfile, "Bad XK_ type \n"));
break;
}
}
if (el->el_map.alt == NULL)
el->el_map.current = el->el_map.key;
}
*cmdnum = cmd;
return (OKCMD);
}
private int
read_char(EditLine *el, char *cp)
{
int num_read;
int tried = 0;
while ((num_read = read(el->el_infd, cp, 1)) == -1)
if (!tried && read__fixio(el->el_infd, errno) == 0)
tried = 1;
else {
*cp = '\0';
return (-1);
}
return (num_read);
}
public int
el_getc(EditLine *el, char *cp)
{
int num_read;
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) {
ma->level--;
}
return (1);
}
#ifdef DEBUG_READ
(void) fprintf(el->el_errfile, "Turning raw mode on\n");
#endif
if (tty_rawmode(el) < 0)
return (0);
#ifdef DEBUG_READ
(void) fprintf(el->el_errfile, "Reading a character\n");
#endif
num_read = (*el->el_read.read_char)(el, cp);
#ifdef DEBUG_READ
(void) fprintf(el->el_errfile, "Got it %c\n", *cp);
#endif
return (num_read);
}
public const char *
el_gets(EditLine *el, int *nread)
{
int retval;
el_action_t cmdnum = 0;
int num;
char ch;
#ifdef FIONREAD
c_macro_t *ma = &el->el_chared.c_macro;
#endif
if (el->el_flags & HANDLE_SIGNALS)
sig_set(el);
if (el->el_flags & NO_TTY) {
char *cp = el->el_line.buffer;
size_t idx;
while ((*el->el_read.read_char)(el, cp) == 1) {
if (cp + 1 >= el->el_line.limit) {
idx = (cp - el->el_line.buffer);
if (!ch_enlargebufs(el, 2))
break;
cp = &el->el_line.buffer[idx];
}
cp++;
if (cp[-1] == '\r' || cp[-1] == '\n')
break;
}
el->el_line.cursor = el->el_line.lastchar = cp;
*cp = '\0';
if (nread)
*nread = el->el_line.cursor - el->el_line.buffer;
return (el->el_line.buffer);
}
re_clear_display(el);
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
re_refresh(el);
if (el->el_flags & EDIT_DISABLED) {
char *cp = el->el_line.buffer;
size_t idx;
term__flush();
while ((*el->el_read.read_char)(el, cp) == 1) {
if (cp + 1 >= el->el_line.limit) {
idx = (cp - el->el_line.buffer);
if (!ch_enlargebufs(el, 2))
break;
cp = &el->el_line.buffer[idx];
}
cp++;
if (cp[-1] == '\r' || cp[-1] == '\n')
break;
}
el->el_line.cursor = el->el_line.lastchar = cp;
*cp = '\0';
if (nread)
*nread = el->el_line.cursor - el->el_line.buffer;
return (el->el_line.buffer);
}
for (num = OKCMD; num == OKCMD;) {
#ifdef DEBUG_EDIT
read_debug(el);
#endif
if ((num = read_getcmd(el, &cmdnum, &ch)) != OKCMD) {
#ifdef DEBUG_READ
(void) fprintf(el->el_errfile,
"Returning from el_gets %d\n", num);
#endif
break;
}
if ((int) cmdnum >= el->el_map.nfunc) {
#ifdef DEBUG_EDIT
(void) fprintf(el->el_errfile,
"ERROR: illegal command from key 0%o\r\n", ch);
#endif
continue;
}
#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
retval = (*el->el_map.func[cmdnum]) (el, ch);
el->el_state.lastcmd = cmdnum;
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);
case CC_REFRESH:
el->el_state.argument = 1;
el->el_state.doingarg = 0;
re_refresh(el);
break;
case CC_REFRESH_BEEP:
el->el_state.argument = 1;
el->el_state.doingarg = 0;
re_refresh(el);
term_beep(el);
break;
case CC_NORM:
el->el_state.argument = 1;
el->el_state.doingarg = 0;
break;
case CC_ARGHACK:
break;
case CC_EOF:
num = 0;
break;
case CC_NEWLINE:
num = el->el_line.lastchar - el->el_line.buffer;
break;
case CC_FATAL:
#ifdef DEBUG_READ
(void) fprintf(el->el_errfile,
"*** editor fatal ERROR ***\r\n\n");
#endif
re_clear_display(el);
ch_reset(el);
re_refresh(el);
el->el_state.argument = 1;
el->el_state.doingarg = 0;
break;
case CC_ERROR:
default:
#ifdef DEBUG_READ
(void) fprintf(el->el_errfile,
"*** editor ERROR ***\r\n\n");
#endif
el->el_state.argument = 1;
el->el_state.doingarg = 0;
term_beep(el);
term__flush();
break;
}
}
(void) tty_cookedmode(el);
term__flush();
if (el->el_flags & HANDLE_SIGNALS)
sig_clr(el);
if (nread)
*nread = num;
return (num ? el->el_line.buffer : NULL);
}