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tpprim.c
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/***********************************************************************
** **
** tpprim - terminal handling primatives for ssmp emulation **
** using the UNIX termcap database. **
** **
***********************************************************************/
#include <stdio.h>
#include "st.typ.h"
#include "local.h"
#include <sys/ioctl.h>
#include <fcntl.h>
#include <signal.h>
#include "iso.h"
/*
** definitions for all mode array indexes
*/
#define TLEVEL 0
#define TMAXROW 1
#define TMAXCOL 2
#define DSINVALID 3
#define NOTIFY 4
#define SELECTGR 5
#define REQSHIFT 6
#define CURSOR 7
#define ICHARMODE 8
#define ILINEROW 9
#define INTSIGNAL 10
#define KINTHOST 11
#define KSUSPEND 12
#define KRESTART 13
#define KENTER 14
#define KCSRUP 15
#define KCSRDOWN 16
#define KCSRLEFT 17
#define KCSRRIGHT 18
#define KNEXTTAB 19
#define KPREVTAB 20
#define KLEFTUPD 21
#define KFIRSTNS 22
#define KALASTNS 23
#define KINSMODE 24
#define KERARIGHT 25
#define KINSSPAC 26
#define KDELCHAR 27
#define KERAPREV 28
#define KINSLINE 29
#define KDELLINE 30
#define KERALINE 31
#define KAPPLINE 32
#define KSPLLINE 33
#define KNEXTFLD 34
#define KPREVFLD 35
#define KHOMEFLD 36
#define KNEWLINE 37
static char tempstr[ZMAXCOL+1];
static char bline[ZMAXCOL+1];
static char tcbuf[1024];
static char iobuffer[BUFSIZ];
static char *AL;
static char *BC;
static char *CE;
static char *CM;
static char *DC;
static char *DL;
static int HZ;
static char *IC;
static char *SE;
static char *SO;
static char *UE;
static char *US;
static int CO = 0;
static int LI = 0;
static int concealed = 0;
static imtype imptr;
static modearray mptr;
/***********************************************************************
** **
** UINITSCRN - initialise the screen, and look up a series of useful **
** values from the termcap database **
** **
***********************************************************************/
UINITSCRN(im,mod)
imtype im;
modearray mod;
{
#define INITBUF 128
char *getenv();
char *s;
char buf[INITBUF];
register int rc;
register char *term;
int fd;
register int c;
static char tcdata[1024]; /* decoded termcap buffer */
static char *tcptr; /* and its pointer */
char *tgetstr();
/*
** first pick up the terminal type and its capability array
*/
if ( (term = getenv("TERM")) == 0)
return(-1);
if ( (rc = tgetent(tcbuf,term)) < 1)
return(-2);
/*
** Set the terminal as buffered
*/
setbuf(stdout,iobuffer);
/*
** Now look for some initialisation string for the terminal
*/
tcptr = tcdata;
if (s = tgetstr("is",&tcptr))
pwrite(s);
else if (s = tgetstr("if",&tcptr))
{
fd = open(s,0);
while ( (c = read(fd,buf,INITBUF)) > 0)
pwrite(buf);
close(fd);
}
/* else assume no initialisation needed */
/*
** Now look up the capabilities that are used later
*/
if ( !( (CM = tgetstr("cm",&tcptr))
&& (DC = tgetstr("dc",&tcptr))
&& (IC = tgetstr("ic",&tcptr))
) )
{
pwrite("\r\nError bad termcap entry\r\n");
fflush(stdout);
kill(getpid(),15);
return(-3);
}
AL = tgetstr("al",&tcptr);
CE = tgetstr("ce",&tcptr);
DL = tgetstr("dl",&tcptr);
HZ = tgetflag("hz");
SE = tgetstr("se",&tcptr);
SO = tgetstr("so",&tcptr);
UE = tgetstr("ue",&tcptr);
US = tgetstr("us",&tcptr);
if ( (CO = tgetnum("co")) < 0)
CO = 0;
if ( (LI = tgetnum("li")) < 0)
LI = 0;
else
LI--;
/*
** save our pointer to the screen image for rowcopy etc.
** save our pointer to the mode array for character substitution etc.
*/
imptr = im;
mptr = mod;
/*
** Set up a line of spaces for UERASEROW
*/
for (c=0; c<=ZMAXCOL; c++)
bline[c] = ' ';
/*
** Perform the necessary stty operations
*/
raw(1);
return(0);
}
/***********************************************************************
** **
** UENDSCRN - tidy up for end of session **
** **
***********************************************************************/
UENDSCRN()
{
int rc;
USETMODE(0,&rc);
UTOKEN(0);
USETCURSOR(LI,0);
UERASEROW(LI,0,(CO-1));
raw(0);
}
/***********************************************************************
** **
** UINTHOST - send an interrupt signal to the host (current process) **
** **
***********************************************************************/
UINTHOST()
{
int pid;
pid = getpid();
kill(pid,SIGINT);
}
/***********************************************************************
** **
** USETCURSOR - set cursor to specified row, col **
** **
***********************************************************************/
USETCURSOR(row,col)
rowtype row;
coltype col;
{
char *ostring;
char *tgoto();
ostring = tgoto(CM,col,row);
pwrite(ostring);
}
/***********************************************************************
** **
** UERASEROW - erase specified row, over column range **
** **
***********************************************************************/
UERASEROW(row,cola,colb)
rowtype row;
coltype cola;
coltype colb;
{
register int count;
USETCURSOR(row,cola);
if (colb == (CO-1) && CE)
pwrite(CE);
else
{
count = colb - cola + 1;
strncpy(tempstr,bline,count);
tempstr[count] = '\0';
pwrite(tempstr);
}
}
/***********************************************************************
** **
** UROWCOPY - copy rowa to rowb over column range **
** **
***********************************************************************/
UROWCOPY(rowa,rowb,cola,colb)
rowtype rowa;
rowtype rowb;
coltype cola;
coltype colb;
{
register int count;
register imtype rowp;
USETCURSOR(rowb,cola);
rowp = imptr + ((ZMAXCOL+1) * rowa);
rowp += cola;
count = colb - cola + 1;
while( count-- ) {
UCHAR( (isochar) *rowp++);
}
}
/***********************************************************************
** **
** URIGHTSHIFT - shift specified row right by num character **
** positions, over column range **
** **
***********************************************************************/
URIGHTSHIFT(row,cola,colb,num)
rowtype row;
coltype cola;
coltype colb;
int num;
{
register int i;
if (colb < CO)
{
USETCURSOR(row, (colb - num + 1) );
for (i = 0; i< num; i++)
pwrite(DC);
}
USETCURSOR(row,cola);
for (i = 0; i < num; i++)
pwrite(IC);
}
/***********************************************************************
** **
** ULEFTSHIFT - shift row left num character places between **
** specified column limits **
** **
***********************************************************************/
ULEFTSHIFT(row,cola,colb,num)
rowtype row;
coltype cola;
coltype colb;
int num;
{
register int i;
USETCURSOR(row,cola);
for (i = 0; i < num; i++)
pwrite(DC);
if (colb < CO)
{
USETCURSOR(row, (colb - num + 1) );
for (i = 0; i< num; i++)
pwrite(IC);
}
}
/***********************************************************************
** **
** USCROLLUP - scroll box up by specified number of lines **
** **
***********************************************************************/
USCROLLUP(rowa, rowb, cola, colb, num)
rowtype rowa;
rowtype rowb;
coltype cola;
coltype colb;
int num;
{
register rowtype trow;
if (cola == 0 && colb == (CO-1) && AL && DL)
{
for(trow = 0; trow < num; trow++)
{
USETCURSOR(rowa,0);
pwrite(DL);
USETCURSOR(rowb,0);
pwrite(AL);
}
}
else
{
for (trow = rowa; trow <= (rowb - num); trow++)
{
UROWCOPY( (trow + num), trow, cola, colb);
}
for ( (trow = rowb - num + 1); trow <= rowb; trow++)
{
UERASEROW(trow,cola,colb);
}
}
}
/***********************************************************************
** **
** USCROLLDOWN - scroll box down by specified number of lines **
** **
***********************************************************************/
USCROLLDOWN(rowa, rowb, cola, colb, num)
rowtype rowa;
rowtype rowb;
coltype cola;
coltype colb;
int num;
{
register rowtype trow;
if (cola == 0 && colb == (CO-1) && AL && DL)
{
for(trow = 0; trow < num; trow++)
{
USETCURSOR(rowb,0);
pwrite(DL);
USETCURSOR(rowa,0);
pwrite(AL);
}
}
else
{
for (trow = rowb; trow >= (rowa + num); trow--)
{
UROWCOPY( (trow - num), trow, cola, colb);
}
for ( (trow = rowa + num - 1); trow >= rowa; trow--)
{
UERASEROW(trow,cola,colb);
}
}
}
/***********************************************************************
** **
** UDELETECHAR - delete one char at current cursor position **
** **
***********************************************************************/
UDELETECHAR()
{
pwrite(DC);
}
/***********************************************************************
** **
** UINSERTSPACE - insert one space at current character position **
** **
***********************************************************************/
UINSERTSPACE()
{
pwrite(IC);
}
/***********************************************************************
** **
** UCHAR - output character at current cursor position **
** **
***********************************************************************/
UCHAR(ch)
isochar ch;
{
if (ch < BLANK || ch >= (HZ ? CTILDE : DEL) )
ch = GRAVE;
if (concealed)
ch = BLANK;
fputc(ch, stdout);
}
/***********************************************************************
** **
** UALARM - sound alarm bell **
** **
***********************************************************************/
UALARM()
{
static char bell = CTLG;
write(2,&bell,1);
}
/***********************************************************************
** **
** USETMODE - set graphic mode **
** **
***********************************************************************/
USETMODE(mode,rc)
smallint mode;
int *rc;
{
static smallint c_mode = 0;
*rc = c_mode;
if (mode == c_mode)
return;
/*
** first un-set the current mode
*/
switch(c_mode)
{
case 4: /* underlined */
pwrite(UE);
break;
case 7: /* negativeimage */
pwrite(SE);
break;
case 8: /* concealed */
concealed = 0;
break;
}
switch(mode)
{
case 0: /* default */
c_mode = 0;
break;
case 4: /* underlined */
if ( US && UE ) {
pwrite(US);
c_mode = 4;
} else {
c_mode = 0;
*rc = -1;
}
break;
case 7: /* negativeimage */
if ( SO && SE) {
pwrite(SO);
c_mode = 7;
} else {
c_mode = 0;
*rc = -1;
}
break;
case 8: /* concealed */
concealed = 1;
c_mode = 8;
break;
default:
*rc = -1;
c_mode = 0;
break;
}
}
/***********************************************************************
** **
** UGETSIZE - get screen sizes **
** **
***********************************************************************/
UGETSIZE(row,col)
rowtype *row;
coltype *col;
{
*row = (rowtype) LI;
*col = (coltype) CO;
}
/***********************************************************************
** **
** UERASEPREV - erase previous char **
** **
***********************************************************************/
UERASEPREV()
{
UCHAR('\b');
UCHAR(' ');
UCHAR('\b');
}
/***********************************************************************
** **
** UTOKEN - Transfer the token to/from the host (logically). In this **
** local implementation the actions performed are:- **
** **
** Flag == 1 (token -> host): **
** Switch on the token light **
** Make the output of characters buffered **
** **
** Flag == 0 (token -> user/terminal): **
** Switch off the token light **
** Un-buffer the output **
** **
***********************************************************************/
UTOKEN(flag)
int flag;
{
int rc;
if (flag)
{
USETCURSOR(LI+1,0);
USETMODE(7,&rc);
pwrite(" TOKEN ");
USETMODE(rc,&rc);
fflush(stdout);
setbuf(stdout,iobuffer);
}
else
{
USETCURSOR(LI+1,0);
USETMODE(0,&rc);
pwrite(" ");
USETMODE(rc,&rc);
fflush(stdout);
setbuf(stdout,(char *)NULL);
}
}
/***********************************************************************
** **
** UREAD - read the next character from the keyboard **
** **
***********************************************************************/
UREAD(ch)
isochar *ch;
{
*ch = getkey();
}
/***********************************************************************
** **
** pwrite - put the supplied character string out to the terminal **
** **
***********************************************************************/
static pwrite(st)
char *st;
{
printf("%s",st);
}
/***********************************************************************
** **
** UDEBUG - put out the arguments on standard error **
** **
***********************************************************************/
UDEBUG(s,x,y,z)
char *s;
int x;
int y;
int z;
{
register char *sp;
char sc[25];
char str[80];
strncpy(sc,s,24);
sc[24] = '\0';
for (sp = sc; *sp; sp++)
if ( *sp == '&' )
*sp = '\0';
sprintf(str,"%s %d %d %d\r\n",sc,x,y,z);
write(2,str,strlen(str));
}
static readtty()
{
char c;
if ( read(0,&c,1) <= 0)
return (EOF);
else
return ( (int) (c & 0177) );
}
static getkey()
{
int c;
static p1 = EOF;
static p2 = EOF;
if (p1 != EOF)
{
c = p1;
p1 = p2;
p2 = EOF;
}
else
{
c = readtty();
}
if ( c == ESC )
{
#ifdef MG1
now(1);
#endif
if (p1 == EOF)
p1 = readtty();
if (p1 == LBRACK || p1 == CAPO )
p2 = readtty();
#ifdef MG1
now(0);
#endif
if (p1 == LBRACK)
{
switch (p2)
{
case CAPA:
p1 = p2 = EOF;
if (mptr[KCSRUP ])
c = (char) mptr[KCSRUP ];
else
c = getkey();
break;
case CAPB:
p1 = p2 = EOF;
if (mptr[KCSRDOWN])
c = (char) mptr[KCSRDOWN];
else
c = getkey();
break;
case CAPC:
p1 = p2 = EOF;
if (mptr[KCSRRIGHT])
c = (char) mptr[KCSRRIGHT];
else
c = getkey();
break;
case CAPD:
p1 = p2 = EOF;
if (mptr[KCSRLEFT])
c = (char) mptr[KCSRLEFT];
else
c = getkey();
break;
} /* of switch */
} /* of LBRACK - cursor key processing */
else if (p1 == CAPO)
{
switch (p2)
{
case CAPP:
case CAPQ:
case CAPR:
case CAPS:
case CAPT:
case CAPU:
case CAPV:
case CAPW:
case CAPX:
p1 = p2 + DIG1 - CAPP;
p2 = EOF;
break;
case CAPY:
p1 = DIG0;
p2 = EOF;
break;
} /* of switch */
} /* of CAPO - Function key processing */
} /* of escape processing */
if ( c == EOF )
return ( ENDFILE );
else
return ( (isochar) c);
}
static raw(flag)
int flag;
{
static struct sgttyb ttymode;
static int ttyflags;
if (flag)
{
ioctl(1,TIOCGETP,(char *)&ttymode);
ttyflags = ttymode.sg_flags;
ttymode.sg_flags = RAW;
ioctl(1,TIOCSETP,(char *)&ttymode);
}
else
{
ttymode.sg_flags = ttyflags;
ioctl(1,TIOCSETP,(char *)&ttymode);
}
}
static now(flag)
int flag;
{
int fcntl_flags;
if (flag)
{
fcntl(0,F_GETFL,fcntl_flags);
fcntl_flags |= FNDELAY;
fcntl(0,F_SETFL,fcntl_flags);
}
else
{
fcntl(0,F_GETFL,fcntl_flags);
fcntl_flags &= (~FNDELAY);
fcntl(0,F_SETFL,fcntl_flags);
}
}