NetBSD-5.0.2/dist/nvi/ip/ip_read.c
/* $NetBSD: ip_read.c,v 1.1.1.2 2008/05/18 14:31:24 aymeric Exp $ */
/*-
* Copyright (c) 1996
* Keith Bostic. All rights reserved.
*
* See the LICENSE file for redistribution information.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "Id: ip_read.c,v 8.23 2001/06/25 15:19:24 skimo Exp (Berkeley) Date: 2001/06/25 15:19:24";
#endif /* not lint */
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/time.h>
#include <bitstring.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>
#include <netinet/in.h>
#include "../common/common.h"
#include "../ex/script.h"
#include "../ipc/ip.h"
#include "extern.h"
extern GS *__global_list;
VIPFUNLIST const vipfuns[] = {
/* VI_C_BOL Cursor to start of line. */
{"", E_IPCOMMAND},
/* VI_C_BOTTOM 2 /* Cursor to bottom. */
{"", E_IPCOMMAND},
/* VI_C_DEL 3 /* Cursor delete. */
{"", E_IPCOMMAND},
/* VI_C_DOWN Cursor down N lines: IPO_INT. */
{"1", E_IPCOMMAND},
/* VI_C_EOL 5 /* Cursor to end of line. */
{"", E_IPCOMMAND},
/* VI_C_INSERT 6 /* Cursor: enter insert mode. */
{"", E_IPCOMMAND},
/* VI_C_LEFT 7 /* Cursor left. */
{"", E_IPCOMMAND},
/* VI_C_PGDOWN 8 /* Cursor down N pages: IPO_INT. */
{"1", E_IPCOMMAND},
/* VI_C_PGUP 9 /* Cursor up N lines: IPO_INT. */
{"1", E_IPCOMMAND},
/* VI_C_RIGHT 10 /* Cursor right. */
{"", E_IPCOMMAND},
/* VI_C_SEARCH 11 /* Cursor: search: IPO_INT, IPO_STR. */
{"a1", E_IPCOMMAND},
/* VI_C_SETTOP 12 /* Cursor: set screen top line: IPO_INT. */
{"1", E_IPCOMMAND},
/* VI_C_TOP 13 /* Cursor to top. */
{"", E_IPCOMMAND},
/* VI_C_UP 14 /* Cursor up N lines: IPO_INT. */
{"1", E_IPCOMMAND},
/* VI_EDIT 15 /* Edit a file: IPO_STR. */
{"a", E_IPCOMMAND},
/* VI_EDITOPT 16 /* Edit option: 2 * IPO_STR, IPO_INT. */
{"ab1", E_IPCOMMAND},
/* VI_EDITSPLIT 17 /* Split to a file: IPO_STR. */
{"a", E_IPCOMMAND},
/* VI_EOF 18 /* End of input (NOT ^D). */
{"", E_EOF},
/* VI_ERR 19 /* Input error. */
{"", E_ERR},
/* VI_FLAGS Flags */
{"1", E_FLAGS},
/* VI_INTERRUPT 20 /* Interrupt. */
{"", E_INTERRUPT},
/* VI_MOUSE_MOVE 21 /* Mouse click move: IPO_INT, IPO_INT. */
{"12", E_IPCOMMAND},
/* VI_QUIT 22 /* Quit. */
{"", E_IPCOMMAND},
/* VI_RESIZE Screen resize: IPO_INT, IPO_INT. */
{"12", E_WRESIZE},
/* VI_SEL_END 24 /* Select end: IPO_INT, IPO_INT. */
{"12", E_IPCOMMAND},
/* VI_SEL_START 25 /* Select start: IPO_INT, IPO_INT. */
{"12", E_IPCOMMAND},
/* VI_SIGHUP 26 /* SIGHUP. */
{"", E_SIGHUP},
/* VI_SIGTERM 27 /* SIGTERM. */
{"", E_SIGTERM},
/* VI_STRING Input string: IPO_STR. */
{"a", E_STRING},
/* VI_TAG 29 /* Tag. */
{"", E_IPCOMMAND},
/* VI_TAGAS 30 /* Tag to a string: IPO_STR. */
{"a", E_IPCOMMAND},
/* VI_TAGSPLIT 31 /* Split to a tag. */
{"", E_IPCOMMAND},
/* VI_UNDO 32 /* Undo. */
{"", E_IPCOMMAND},
/* VI_WQ 33 /* Write and quit. */
{"", E_IPCOMMAND},
/* VI_WRITE 34 /* Write. */
{"", E_IPCOMMAND},
/* VI_WRITEAS 35 /* Write as another file: IPO_STR. */
{"a", E_IPCOMMAND},
/* VI_EVENT_SUP */
};
typedef enum { INP_OK=0, INP_EOF, INP_ERR, INP_TIMEOUT } input_t;
static input_t ip_read __P((SCR *, IP_PRIVATE *, struct timeval *, int, int*));
static int ip_resize __P((SCR *, u_int32_t, u_int32_t));
static int ip_trans __P((SCR *, IP_PRIVATE *, EVENT *));
/*
* ip_event --
* Return a single event.
*
* PUBLIC: int ip_event __P((SCR *, EVENT *, u_int32_t, int));
*/
int
ip_event(SCR *sp, EVENT *evp, u_int32_t flags, int ms)
{
return ip_wevent(sp->wp, sp, evp, flags, ms);
}
/*
* XXX probably better to require new_window to send size
* so we never have to call ip_wevent with sp == NULL
*
* ip_wevent --
* Return a single event.
*
* PUBLIC: int ip_wevent __P((WIN *, SCR *, EVENT *, u_int32_t, int));
*/
int
ip_wevent(WIN *wp, SCR *sp, EVENT *evp, u_int32_t flags, int ms)
{
IP_PRIVATE *ipp;
struct timeval t, *tp;
int termread;
int nr;
if (LF_ISSET(EC_INTERRUPT)) { /* XXX */
evp->e_event = E_TIMEOUT;
return (0);
}
ipp = sp == NULL ? WIPP(wp) : IPP(sp);
/* Discard the last command. */
if (ipp->iskip != 0) {
ipp->iblen -= ipp->iskip;
memmove(ipp->ibuf, ipp->ibuf + ipp->iskip, ipp->iblen);
ipp->iskip = 0;
}
termread = F_ISSET(ipp, IP_IN_EX) ||
(sp && F_ISSET(sp, SC_SCR_EXWROTE));
/* Process possible remaining commands */
if (!termread && ipp->iblen >= IPO_CODE_LEN && ip_trans(sp, ipp, evp))
return 0;
/* Set timer. */
if (ms == 0)
tp = NULL;
else {
t.tv_sec = ms / 1000;
t.tv_usec = (ms % 1000) * 1000;
tp = &t;
}
/* Read input events. */
for (;;) {
switch (ip_read(sp, ipp, tp, termread, &nr)) {
case INP_OK:
if (termread) {
evp->e_csp = ipp->tbuf;
evp->e_len = nr;
evp->e_event = E_STRING;
} else if (!ip_trans(sp, ipp, evp))
continue;
break;
case INP_EOF:
evp->e_event = E_EOF;
break;
case INP_ERR:
evp->e_event = E_ERR;
break;
case INP_TIMEOUT:
evp->e_event = E_TIMEOUT;
break;
default:
abort();
}
break;
}
return (0);
}
/*
* ip_read --
* Read characters from the input.
*/
static input_t
ip_read(SCR *sp, IP_PRIVATE *ipp, struct timeval *tp, int termread, int *nr)
{
struct timeval poll;
GS *gp;
fd_set rdfd;
input_t rval;
size_t blen;
int maxfd;
char *bp;
int fd;
CHAR_T *wp;
size_t wlen;
gp = sp == NULL ? __global_list : sp->gp;
bp = ipp->ibuf + ipp->iblen;
blen = sizeof(ipp->ibuf) - ipp->iblen;
fd = termread ? ipp->t_fd : ipp->i_fd;
/*
* 1: A read with an associated timeout, e.g., trying to complete
* a map sequence. If input exists, we fall into #2.
*/
FD_ZERO(&rdfd);
poll.tv_sec = 0;
poll.tv_usec = 0;
if (tp != NULL) {
FD_SET(fd, &rdfd);
switch (select(fd + 1,
&rdfd, NULL, NULL, tp == NULL ? &poll : tp)) {
case 0:
return (INP_TIMEOUT);
case -1:
goto err;
default:
break;
}
}
/*
* 2: Wait for input.
*
* Select on the command input and scripting window file descriptors.
* It's ugly that we wait on scripting file descriptors here, but it's
* the only way to keep from locking out scripting windows.
*/
if (sp != NULL && F_ISSET(gp, G_SCRWIN)) {
FD_ZERO(&rdfd);
FD_SET(fd, &rdfd);
maxfd = fd;
if (sscr_check_input(sp, &rdfd, maxfd))
goto err;
}
/*
* 3: Read the input.
*/
switch (*nr = read(fd, termread ? (char *)ipp->tbuf : bp,
termread ? sizeof(ipp->tbuf)/sizeof(CHAR_T)
: blen)) {
case 0: /* EOF. */
rval = INP_EOF;
break;
case -1: /* Error or interrupt. */
err: rval = INP_ERR;
msgq(sp, M_SYSERR, "input");
break;
default: /* Input characters. */
if (!termread) ipp->iblen += *nr;
else {
CHAR2INT(sp, (char *)ipp->tbuf, *nr, wp, wlen);
MEMMOVEW(ipp->tbuf, wp, wlen);
}
rval = INP_OK;
break;
}
return (rval);
}
/*
* ip_trans --
* Translate messages into events.
*/
static int
ip_trans(SCR *sp, IP_PRIVATE *ipp, EVENT *evp)
{
u_int32_t skip, val;
char *fmt;
CHAR_T *wp;
size_t wlen;
if (ipp->ibuf[0] == CODE_OOB ||
ipp->ibuf[0] >= VI_EVENT_SUP)
{
/*
* XXX: Protocol is out of sync?
*/
abort();
}
fmt = vipfuns[ipp->ibuf[0]-1].format;
evp->e_event = vipfuns[ipp->ibuf[0]-1].e_event;
evp->e_ipcom = ipp->ibuf[0];
for (skip = IPO_CODE_LEN; *fmt != '\0'; ++fmt)
switch (*fmt) {
case '1':
case '2':
if (ipp->iblen < skip + IPO_INT_LEN)
return (0);
memcpy(&val, ipp->ibuf + skip, IPO_INT_LEN);
val = ntohl(val);
if (*fmt == '1')
evp->e_val1 = val;
else
evp->e_val2 = val;
skip += IPO_INT_LEN;
break;
case 'a':
case 'b':
if (ipp->iblen < skip + IPO_INT_LEN)
return (0);
memcpy(&val, ipp->ibuf + skip, IPO_INT_LEN);
val = ntohl(val);
skip += IPO_INT_LEN;
if (ipp->iblen < skip + val)
return (0);
if (*fmt == 'a') {
CHAR2INT(sp, ipp->ibuf + skip, val,
wp, wlen);
MEMCPYW(ipp->tbuf, wp, wlen);
evp->e_str1 = ipp->tbuf;
evp->e_len1 = wlen;
} else {
CHAR2INT(sp, ipp->ibuf + skip, val,
wp, wlen);
MEMCPYW(ipp->tbuf, wp, wlen);
evp->e_str2 = ipp->tbuf;
evp->e_len2 = wlen;
}
skip += val;
break;
}
ipp->iskip = skip;
if (evp->e_event == E_WRESIZE)
(void)ip_resize(sp, evp->e_val1, evp->e_val2);
return (1);
}
/*
* ip_resize --
* Reset the options for a resize event.
*/
static int
ip_resize(SCR *sp, u_int32_t lines, u_int32_t columns)
{
GS *gp;
int rval;
/*
* XXX
* The IP screen has to know the lines and columns before anything
* else happens. So, we may not have a valid SCR pointer, and we
* have to deal with that.
*/
if (sp == NULL) {
gp = __global_list;
OG_VAL(gp, GO_LINES) = OG_D_VAL(gp, GO_LINES) = lines;
OG_VAL(gp, GO_COLUMNS) = OG_D_VAL(gp, GO_COLUMNS) = columns;
return (0);
}
rval = api_opts_set(sp, L("lines"), NULL, lines, 0);
if (api_opts_set(sp, L("columns"), NULL, columns, 0))
rval = 1;
return (rval);
}