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1 | \ ========== Copyright Header Begin ========================================== |
2 | \ | |
3 | \ Hypervisor Software File: methods.fth | |
4 | \ | |
5 | \ Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. | |
6 | \ | |
7 | \ - Do no alter or remove copyright notices | |
8 | \ | |
9 | \ - Redistribution and use of this software in source and binary forms, with | |
10 | \ or without modification, are permitted provided that the following | |
11 | \ conditions are met: | |
12 | \ | |
13 | \ - Redistribution of source code must retain the above copyright notice, | |
14 | \ this list of conditions and the following disclaimer. | |
15 | \ | |
16 | \ - Redistribution in binary form must reproduce the above copyright notice, | |
17 | \ this list of conditions and the following disclaimer in the | |
18 | \ documentation and/or other materials provided with the distribution. | |
19 | \ | |
20 | \ Neither the name of Sun Microsystems, Inc. or the names of contributors | |
21 | \ may be used to endorse or promote products derived from this software | |
22 | \ without specific prior written permission. | |
23 | \ | |
24 | \ This software is provided "AS IS," without a warranty of any kind. | |
25 | \ ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, | |
26 | \ INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A | |
27 | \ PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN | |
28 | \ MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR | |
29 | \ ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR | |
30 | \ DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN | |
31 | \ OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR | |
32 | \ FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE | |
33 | \ DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, | |
34 | \ ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF | |
35 | \ SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. | |
36 | \ | |
37 | \ You acknowledge that this software is not designed, licensed or | |
38 | \ intended for use in the design, construction, operation or maintenance of | |
39 | \ any nuclear facility. | |
40 | \ | |
41 | \ ========== Copyright Header End ============================================ | |
42 | id: @(#)methods.fth 1.1 06/02/16 | |
43 | purpose: | |
44 | copyright: Copyright 2006 Sun Microsystems, Inc. All Rights Reserved. | |
45 | copyright: Use is subject to license terms. | |
46 | ||
47 | headerless | |
48 | ||
49 | alias ubreak? hyperbreak? | |
50 | alias (ukey?) hyperkey? | |
51 | alias (ukey) hyperkey | |
52 | alias uemit hyperemit | |
53 | ||
54 | d# 90 constant ubufsize | |
55 | ubufsize buffer: ubuf | |
56 | 0 value getptr | |
57 | 0 value putptr | |
58 | 0 value endptr | |
59 | ||
60 | variable ttylock | |
61 | ||
62 | : initubuf ( -- ) | |
63 | ubuf dup is getptr | |
64 | dup is putptr | |
65 | ubufsize + is endptr | |
66 | ; | |
67 | ||
68 | : ubuf-empty? ( -- flag ) getptr putptr = ; | |
69 | ||
70 | \ Read a key into the buffer, ignoring overrun | |
71 | : bput ( key -- ) | |
72 | putptr endptr >= if ubuf is putptr then | |
73 | putptr c! putptr 1+ is putptr | |
74 | ; | |
75 | ||
76 | \ Clear the buffer | |
77 | : bputclr ( -- ) getptr is putptr ; | |
78 | ||
79 | \ Read a key from the buffer | |
80 | : bget ( -- key ) | |
81 | getptr endptr >= if ubuf is getptr then | |
82 | getptr c@ getptr 1+ is getptr | |
83 | ; | |
84 | ||
85 | : uread ( -- ) | |
86 | ttylock on | |
87 | begin (ukey?) while (ukey) bput repeat | |
88 | ttylock off | |
89 | ; | |
90 | ||
91 | : ukey? ( -- flag ) uread ubuf-empty? 0= ; | |
92 | : ukey ( -- char ) begin ukey? until bget ; | |
93 | ||
94 | ||
95 | : clear-break ( -- ) | |
96 | ukey? drop bputclr false to ubreak? | |
97 | ; | |
98 | ||
99 | : poll-tty ( -- ) | |
100 | ttylock @ if exit then | |
101 | ubreak? if clear-break user-abort then | |
102 | \ Give lower levels chance to work. | |
103 | ukey? drop | |
104 | ; | |
105 | ||
106 | h# 7f constant mask-#data | |
107 | ||
108 | : /string ( adr len cnt -- adr+cnt len-cnt ) tuck 2swap + -rot - ; | |
109 | ||
110 | external | |
111 | ||
112 | : open ( -- ok? ) initubuf ttylock off true ; | |
113 | ||
114 | : close ( -- ) ; | |
115 | ||
116 | : read ( adr len -- #read ) | |
117 | ukey? 0= if 2drop -2 exit then ( adr len ) | |
118 | tuck ( len adr len ) | |
119 | begin dup 0<> ukey? 0<> and while ( len adr len ) | |
120 | over ukey mask-#data and swap c! ( len adr len ) | |
121 | 1 /string ( len adr' len' ) | |
122 | repeat ( len adr' len' ) | |
123 | nip - ( #read ) | |
124 | ; | |
125 | ||
126 | : write ( adr len -- #written ) | |
127 | tuck bounds ?do ( len ) | |
128 | i c@ uemit ( len ) | |
129 | loop ( len ) | |
130 | ; | |
131 | ||
132 | : install-abort ( -- ) ['] poll-tty d# 10 alarm ; | |
133 | ||
134 | : remove-abort ( -- ) ['] poll-tty 0 alarm ; | |
135 | ||
136 | : restore ( -- ) ; | |
137 | ||
138 | : ring-bell ( -- ) ; | |
139 | ||
140 | headerless |