| 1 | /* $Id$ */ |
| 2 | /*************************************************************** |
| 3 | ** I/O subsystem for PForth based on 'C' |
| 4 | ** |
| 5 | ** Author: Phil Burk |
| 6 | ** Copyright 1994 3DO, Phil Burk, Larry Polansky, David Rosenboom |
| 7 | ** |
| 8 | ** The pForth software code is dedicated to the public domain, |
| 9 | ** and any third party may reproduce, distribute and modify |
| 10 | ** the pForth software code or any derivative works thereof |
| 11 | ** without any compensation or license. The pForth software |
| 12 | ** code is provided on an "as is" basis without any warranty |
| 13 | ** of any kind, including, without limitation, the implied |
| 14 | ** warranties of merchantability and fitness for a particular |
| 15 | ** purpose and their equivalents under the laws of any jurisdiction. |
| 16 | ** |
| 17 | **************************************************************** |
| 18 | ** 941004 PLB Extracted IO calls from pforth_main.c |
| 19 | ** 090220 PLB Fixed broken sdQueryTerminal on Mac. It always returned true. |
| 20 | ***************************************************************/ |
| 21 | |
| 22 | #include "../pf_all.h" |
| 23 | |
| 24 | /* Configure console so that characters are not buffered. |
| 25 | * This allows KEY and ?TERMINAL to work and also HISTORY.ON |
| 26 | */ |
| 27 | |
| 28 | #include <unistd.h> |
| 29 | #include <sys/time.h> |
| 30 | #ifdef sun |
| 31 | #include <sys/int_types.h> /* Needed on Solaris for uint32_t in termio.h */ |
| 32 | #endif |
| 33 | #include <termios.h> |
| 34 | #include <sys/poll.h> |
| 35 | |
| 36 | static struct termios save_termios; |
| 37 | static int stdin_is_tty; |
| 38 | |
| 39 | /* poll() is broken in Mac OS X Tiger OS so use select() instead. */ |
| 40 | #ifndef PF_USE_SELECT |
| 41 | #define PF_USE_SELECT (1) |
| 42 | #endif |
| 43 | |
| 44 | /* Default portable terminal I/O. */ |
| 45 | int sdTerminalOut( char c ) |
| 46 | { |
| 47 | return putchar(c); |
| 48 | } |
| 49 | |
| 50 | int sdTerminalEcho( char c ) |
| 51 | { |
| 52 | putchar(c); |
| 53 | return 0; |
| 54 | } |
| 55 | |
| 56 | int sdTerminalIn( void ) |
| 57 | { |
| 58 | return getchar(); |
| 59 | } |
| 60 | |
| 61 | int sdTerminalFlush( void ) |
| 62 | { |
| 63 | #ifdef PF_NO_FILEIO |
| 64 | return -1; |
| 65 | #else |
| 66 | return fflush(PF_STDOUT); |
| 67 | #endif |
| 68 | } |
| 69 | |
| 70 | /****************************************************/ |
| 71 | int sdQueryTerminal( void ) |
| 72 | { |
| 73 | #if PF_USE_SELECT |
| 74 | int select_retval; |
| 75 | fd_set readfds; |
| 76 | struct timeval tv; |
| 77 | FD_ZERO(&readfds); |
| 78 | FD_SET(STDIN_FILENO, &readfds); |
| 79 | /* Set timeout to zero so that we just poll and return. */ |
| 80 | tv.tv_sec = 0; |
| 81 | tv.tv_usec = 0; |
| 82 | select_retval = select(STDIN_FILENO+1, &readfds, NULL, NULL, &tv); |
| 83 | if (select_retval < 0) |
| 84 | { |
| 85 | perror("sdTerminalInit: select"); |
| 86 | } |
| 87 | return FD_ISSET(STDIN_FILENO,&readfds) ? FTRUE : FFALSE; |
| 88 | |
| 89 | #else |
| 90 | int result; |
| 91 | struct pollfd pfd = { 0 }; |
| 92 | sdTerminalFlush(); |
| 93 | pfd.fd = STDIN_FILENO; |
| 94 | pfd.events = POLLIN; |
| 95 | result = poll( &pfd, 1, 0 ); |
| 96 | /* On a Mac it may set revents to POLLNVAL because poll() is broken on Tiger. */ |
| 97 | if( pfd.revents & POLLNVAL ) |
| 98 | { |
| 99 | PRT(("sdQueryTerminal: poll got POLLNVAL, stdin not open\n")); |
| 100 | return FFALSE; |
| 101 | } |
| 102 | else |
| 103 | { |
| 104 | return (pfd.revents & POLLIN) ? FTRUE : FFALSE; |
| 105 | } |
| 106 | #endif |
| 107 | } |
| 108 | |
| 109 | /****************************************************/ |
| 110 | void sdTerminalInit(void) |
| 111 | { |
| 112 | struct termios term; |
| 113 | |
| 114 | stdin_is_tty = isatty(STDIN_FILENO); |
| 115 | if (stdin_is_tty) |
| 116 | { |
| 117 | /* Get current terminal attributes and save them so we can restore them. */ |
| 118 | tcgetattr(STDIN_FILENO, &term); |
| 119 | save_termios = term; |
| 120 | |
| 121 | /* ICANON says to wait upon read until a character is received, |
| 122 | * and then to return it immediately (or soon enough....) |
| 123 | * ECHOCTL says not to echo backspaces and other control chars as ^H */ |
| 124 | term.c_lflag &= ~( ECHO | ECHONL | ECHOCTL | ICANON ); |
| 125 | term.c_cc[VTIME] = 0; |
| 126 | term.c_cc[VMIN] = 1; |
| 127 | if( tcsetattr(STDIN_FILENO, TCSANOW, &term) < 0 ) |
| 128 | { |
| 129 | perror("sdTerminalInit: tcsetattr"); |
| 130 | } |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | /****************************************************/ |
| 135 | void sdTerminalTerm(void) |
| 136 | { |
| 137 | if (stdin_is_tty) |
| 138 | { |
| 139 | tcsetattr(STDIN_FILENO, TCSANOW, &save_termios); |
| 140 | } |
| 141 | } |