Commit | Line | Data |
---|---|---|
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 | ** | |
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 | } |