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/* $Id$ */
/***************************************************************
** I/O subsystem for PForth based on 'C'
**
** Author: Phil Burk
** Copyright 1994 3DO, Phil Burk, Larry Polansky, David Rosenboom
**
** Permission to use, copy, modify, and/or distribute this
** software for any purpose with or without fee is hereby granted.
**
** THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
** WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
** WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
** THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
** CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
** FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
** CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
** OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
**
****************************************************************
** 941004 PLB Extracted IO calls from pforth_main.c
** 090220 PLB Fixed broken sdQueryTerminal on Mac. It always returned true.
***************************************************************/
#include "../pf_all.h"
/* Configure console so that characters are not buffered.
* This allows KEY and ?TERMINAL to work and also HISTORY.ON
*/
#include <unistd.h>
#include <sys/time.h>
#ifdef sun
#include <sys/int_types.h> /* Needed on Solaris for uint32_t in termio.h */
#endif
#include <termios.h>
#include <sys/poll.h>
static struct termios save_termios;
static int stdin_is_tty;
/* poll() is broken in Mac OS X Tiger OS so use select() instead. */
#ifndef PF_USE_SELECT
#define PF_USE_SELECT (1)
#endif
/* Default portable terminal I/O. */
int sdTerminalOut( char c )
{
return putchar(c);
}
int sdTerminalEcho( char c )
{
putchar(c);
return 0;
}
int sdTerminalIn( void )
{
return getchar();
}
int sdTerminalFlush( void )
{
#ifdef PF_NO_FILEIO
return -1;
#else
return fflush(PF_STDOUT);
#endif
}
/****************************************************/
int sdQueryTerminal( void )
{
#if PF_USE_SELECT
int select_retval;
fd_set readfds;
struct timeval tv;
FD_ZERO(&readfds);
FD_SET(STDIN_FILENO, &readfds);
/* Set timeout to zero so that we just poll and return. */
tv.tv_sec = 0;
tv.tv_usec = 0;
select_retval = select(STDIN_FILENO+1, &readfds, NULL, NULL, &tv);
if (select_retval < 0)
{
perror("sdTerminalInit: select");
}
return FD_ISSET(STDIN_FILENO,&readfds) ? FTRUE : FFALSE;
#else
int result;
struct pollfd pfd = { 0 };
sdTerminalFlush();
pfd.fd = STDIN_FILENO;
pfd.events = POLLIN;
result = poll( &pfd, 1, 0 );
/* On a Mac it may set revents to POLLNVAL because poll() is broken on Tiger. */
if( pfd.revents & POLLNVAL )
{
PRT(("sdQueryTerminal: poll got POLLNVAL, stdin not open\n"));
return FFALSE;
}
else
{
return (pfd.revents & POLLIN) ? FTRUE : FFALSE;
}
#endif
}
/****************************************************/
void sdTerminalInit(void)
{
struct termios term;
stdin_is_tty = isatty(STDIN_FILENO);
if (stdin_is_tty)
{
/* Get current terminal attributes and save them so we can restore them. */
tcgetattr(STDIN_FILENO, &term);
save_termios = term;
/* ICANON says to wait upon read until a character is received,
* and then to return it immediately (or soon enough....)
* ECHOCTL says not to echo backspaces and other control chars as ^H */
term.c_lflag &= ~( ECHO | ECHONL | ECHOCTL | ICANON );
term.c_cc[VTIME] = 0;
term.c_cc[VMIN] = 1;
if( tcsetattr(STDIN_FILENO, TCSANOW, &term) < 0 )
{
perror("sdTerminalInit: tcsetattr");
}
if (setvbuf(stdout, NULL, _IONBF, (size_t) 0) != 0)
{
perror("sdTerminalInit: setvbuf");
}
}
}
/****************************************************/
void sdTerminalTerm(void)
{
if (stdin_is_tty)
{
tcsetattr(STDIN_FILENO, TCSANOW, &save_termios);
}
}
cell_t sdSleepMillis(cell_t msec)
{
const cell_t kMaxMicros = 500000; /* to be safe, usleep() limit is 1000000 */
cell_t micros;
cell_t napTime;
if (msec < 0) return 0;
micros = msec * 1000;
while (micros > 0)
{
napTime = (micros > kMaxMicros) ? kMaxMicros : micros;
if (usleep(napTime))
{
perror("sdSleepMillis: usleep failed");
return -1;
}
micros -= napTime;
}
return 0;
}
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