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8e9db35f PB |
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 | ** | |
1f99f95d S |
8 | ** Permission to use, copy, modify, and/or distribute this |
9 | ** software for any purpose with or without fee is hereby granted. | |
10 | ** | |
11 | ** THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL | |
12 | ** WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED | |
13 | ** WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL | |
14 | ** THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR | |
15 | ** CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING | |
16 | ** FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF | |
17 | ** CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
18 | ** OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
8e9db35f PB |
19 | ** |
20 | **************************************************************** | |
21 | ** 941004 PLB Extracted IO calls from pforth_main.c | |
22 | ** 090220 PLB Fixed broken sdQueryTerminal on Mac. It always returned true. | |
23 | ***************************************************************/ | |
24 | ||
25 | #include "../pf_all.h" | |
26 | ||
27 | /* Configure console so that characters are not buffered. | |
28 | * This allows KEY and ?TERMINAL to work and also HISTORY.ON | |
29 | */ | |
30 | ||
31 | #include <unistd.h> | |
32 | #include <sys/time.h> | |
33 | #ifdef sun | |
34 | #include <sys/int_types.h> /* Needed on Solaris for uint32_t in termio.h */ | |
35 | #endif | |
36 | #include <termios.h> | |
37 | #include <sys/poll.h> | |
38 | ||
39 | static struct termios save_termios; | |
40 | static int stdin_is_tty; | |
41 | ||
42 | /* poll() is broken in Mac OS X Tiger OS so use select() instead. */ | |
43 | #ifndef PF_USE_SELECT | |
44 | #define PF_USE_SELECT (1) | |
45 | #endif | |
46 | ||
47 | /* Default portable terminal I/O. */ | |
48 | int sdTerminalOut( char c ) | |
49 | { | |
50 | return putchar(c); | |
51 | } | |
52 | ||
53 | int sdTerminalEcho( char c ) | |
54 | { | |
55 | putchar(c); | |
56 | return 0; | |
57 | } | |
58 | ||
59 | int sdTerminalIn( void ) | |
60 | { | |
61 | return getchar(); | |
62 | } | |
63 | ||
64 | int sdTerminalFlush( void ) | |
65 | { | |
66 | #ifdef PF_NO_FILEIO | |
67 | return -1; | |
68 | #else | |
69 | return fflush(PF_STDOUT); | |
70 | #endif | |
71 | } | |
72 | ||
73 | /****************************************************/ | |
74 | int sdQueryTerminal( void ) | |
75 | { | |
76 | #if PF_USE_SELECT | |
77 | int select_retval; | |
78 | fd_set readfds; | |
79 | struct timeval tv; | |
80 | FD_ZERO(&readfds); | |
81 | FD_SET(STDIN_FILENO, &readfds); | |
82 | /* Set timeout to zero so that we just poll and return. */ | |
83 | tv.tv_sec = 0; | |
84 | tv.tv_usec = 0; | |
85 | select_retval = select(STDIN_FILENO+1, &readfds, NULL, NULL, &tv); | |
86 | if (select_retval < 0) | |
87 | { | |
88 | perror("sdTerminalInit: select"); | |
89 | } | |
90 | return FD_ISSET(STDIN_FILENO,&readfds) ? FTRUE : FFALSE; | |
91 | ||
92 | #else | |
93 | int result; | |
94 | struct pollfd pfd = { 0 }; | |
95 | sdTerminalFlush(); | |
96 | pfd.fd = STDIN_FILENO; | |
97 | pfd.events = POLLIN; | |
98 | result = poll( &pfd, 1, 0 ); | |
99 | /* On a Mac it may set revents to POLLNVAL because poll() is broken on Tiger. */ | |
100 | if( pfd.revents & POLLNVAL ) | |
101 | { | |
102 | PRT(("sdQueryTerminal: poll got POLLNVAL, stdin not open\n")); | |
103 | return FFALSE; | |
104 | } | |
105 | else | |
106 | { | |
107 | return (pfd.revents & POLLIN) ? FTRUE : FFALSE; | |
108 | } | |
109 | #endif | |
110 | } | |
111 | ||
112 | /****************************************************/ | |
113 | void sdTerminalInit(void) | |
114 | { | |
115 | struct termios term; | |
116 | ||
117 | stdin_is_tty = isatty(STDIN_FILENO); | |
118 | if (stdin_is_tty) | |
119 | { | |
120 | /* Get current terminal attributes and save them so we can restore them. */ | |
121 | tcgetattr(STDIN_FILENO, &term); | |
122 | save_termios = term; | |
123 | ||
124 | /* ICANON says to wait upon read until a character is received, | |
125 | * and then to return it immediately (or soon enough....) | |
126 | * ECHOCTL says not to echo backspaces and other control chars as ^H */ | |
127 | term.c_lflag &= ~( ECHO | ECHONL | ECHOCTL | ICANON ); | |
128 | term.c_cc[VTIME] = 0; | |
129 | term.c_cc[VMIN] = 1; | |
130 | if( tcsetattr(STDIN_FILENO, TCSANOW, &term) < 0 ) | |
131 | { | |
132 | perror("sdTerminalInit: tcsetattr"); | |
133 | } | |
134 | } | |
135 | } | |
136 | ||
137 | /****************************************************/ | |
138 | void sdTerminalTerm(void) | |
139 | { | |
140 | if (stdin_is_tty) | |
141 | { | |
142 | tcsetattr(STDIN_FILENO, TCSANOW, &save_termios); | |
143 | } | |
144 | } |