Reduce extern's.

[unix-history] / usr / src / usr.bin / telnet / terminal.c

#include <arpa/telnet.h>
#include <sys/types.h>

#include "ring.h"

#include "externs.h"
#include "types.h"

Ring    ttyoring, ttyiring;
char    ttyobuf[2*BUFSIZ], ttyibuf[BUFSIZ];

char
   termEofChar,
   termEraseChar,
   termFlushChar,
   termIntChar,
   termKillChar,
   termLiteralNextChar,
   termQuitChar;

/*
* initialize the terminal data structures.
*/

init_terminal()
{
   ring_init(&ttyoring, ttyobuf, sizeof ttyobuf);
   ring_init(&ttyiring, ttyibuf, sizeof ttyibuf);
   autoflush = TerminalAutoFlush();
}


/*
*              Send as much data as possible to the terminal.
*
*              The return value indicates whether we did any
*      useful work.
*/


int
ttyflush(drop)
int drop;
{
   register int n, n0, n1;

   n0 = ring_full_count(&ttyoring);
   if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) {
       if (drop) {
           TerminalFlushOutput();
           /* we leave 'n' alone! */
       } else {
           n = TerminalWrite(ttyoring.consume, n);
       }
   }
   if (n > 0) {
       /*
        * If we wrote everything, and the full count is
        * larger than what we wrote, then write the
        * rest of the buffer.
        */
       if (n1 == n && n0 > n) {
               n1 = n0 - n;
               if (!drop)
                       n1 = TerminalWrite(ttyoring.bottom, n1);
               n += n1;
       }
       ring_consumed(&ttyoring, n);
   }
   return n > 0;
}

\f
/*
* These routines decides on what the mode should be (based on the values
* of various global variables).
*/


int
getconnmode()
{
   static char newmode[16] =
                       { 4, 5, 3, 3, 2, 2, 1, 1, 6, 6, 6, 6, 6, 6, 6, 6 };
   int modeindex = 0;

   if (dontlecho && (clocks.echotoggle > clocks.modenegotiated)) {
       modeindex += 1;
   }
   if (hisopts[TELOPT_ECHO]) {
       modeindex += 2;
   }
   if (hisopts[TELOPT_SGA]) {
       modeindex += 4;
   }
   if (In3270) {
       modeindex += 8;
   }
   return newmode[modeindex];
}

void
setconnmode()
{
   TerminalNewMode(getconnmode());
}


void
setcommandmode()
{
   TerminalNewMode(0);
}