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1 | /* |
1 | /* |
2 | * Copyright (C) 2003 Josef Cejka |
2 | * Copyright (C) 2003 Josef Cejka |
3 | * Copyright (C) 2005 Jakub Jermar |
3 | * Copyright (C) 2005 Jakub Jermar |
4 | * All rights reserved. |
4 | * All rights reserved. |
5 | * |
5 | * |
6 | * Redistribution and use in source and binary forms, with or without |
6 | * Redistribution and use in source and binary forms, with or without |
7 | * modification, are permitted provided that the following conditions |
7 | * modification, are permitted provided that the following conditions |
8 | * are met: |
8 | * are met: |
9 | * |
9 | * |
10 | * - Redistributions of source code must retain the above copyright |
10 | * - Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * - Redistributions in binary form must reproduce the above copyright |
12 | * - Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
14 | * documentation and/or other materials provided with the distribution. |
15 | * - The name of the author may not be used to endorse or promote products |
15 | * - The name of the author may not be used to endorse or promote products |
16 | * derived from this software without specific prior written permission. |
16 | * derived from this software without specific prior written permission. |
17 | * |
17 | * |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
28 | */ |
28 | */ |
29 | 29 | ||
30 | #include <console/console.h> |
30 | #include <console/console.h> |
31 | #include <console/chardev.h> |
31 | #include <console/chardev.h> |
32 | #include <synch/waitq.h> |
32 | #include <synch/waitq.h> |
33 | #include <synch/spinlock.h> |
33 | #include <synch/spinlock.h> |
34 | #include <arch/types.h> |
34 | #include <arch/types.h> |
35 | #include <typedefs.h> |
35 | #include <typedefs.h> |
36 | #include <arch.h> |
36 | #include <arch.h> |
37 | 37 | ||
38 | /** Standard input character device. */ |
38 | /** Standard input character device. */ |
39 | chardev_t *stdin = NULL; |
39 | chardev_t *stdin = NULL; |
40 | chardev_t *stdout = NULL; |
40 | chardev_t *stdout = NULL; |
41 | 41 | ||
42 | /** Get character from character device. |
42 | /** Get character from character device. Do not echo character. |
43 | * |
43 | * |
44 | * @param chardev Character device. |
44 | * @param chardev Character device. |
45 | * |
45 | * |
46 | * @return Character read. |
46 | * @return Character read. |
47 | */ |
47 | */ |
48 | static __u8 _getc(chardev_t *chardev) |
48 | __u8 _getc(chardev_t *chardev) |
49 | { |
49 | { |
50 | __u8 ch; |
50 | __u8 ch; |
51 | ipl_t ipl; |
51 | ipl_t ipl; |
52 | 52 | ||
53 | waitq_sleep(&chardev->wq); |
53 | waitq_sleep(&chardev->wq); |
54 | ipl = interrupts_disable(); |
54 | ipl = interrupts_disable(); |
55 | spinlock_lock(&chardev->lock); |
55 | spinlock_lock(&chardev->lock); |
56 | ch = chardev->buffer[(chardev->index - chardev->counter) % CHARDEV_BUFLEN]; |
56 | ch = chardev->buffer[(chardev->index - chardev->counter) % CHARDEV_BUFLEN]; |
57 | chardev->counter--; |
57 | chardev->counter--; |
58 | spinlock_unlock(&chardev->lock); |
58 | spinlock_unlock(&chardev->lock); |
59 | interrupts_restore(ipl); |
59 | interrupts_restore(ipl); |
60 | 60 | ||
61 | chardev->op->resume(chardev); |
61 | chardev->op->resume(chardev); |
62 | 62 | ||
63 | return ch; |
63 | return ch; |
64 | } |
64 | } |
65 | 65 | ||
66 | /** Get string from character device. |
66 | /** Get string from character device. |
67 | * |
67 | * |
68 | * Read characters from character device until first occurrence |
68 | * Read characters from character device until first occurrence |
69 | * of newline character. |
69 | * of newline character. |
70 | * |
70 | * |
71 | * @param chardev Character device. |
71 | * @param chardev Character device. |
72 | * @param buf Buffer where to store string terminated by '\0'. |
72 | * @param buf Buffer where to store string terminated by '\0'. |
73 | * @param len Size of the buffer. |
73 | * @param len Size of the buffer. |
74 | * |
74 | * |
75 | * @return Number of characters read. |
75 | * @return Number of characters read. |
76 | */ |
76 | */ |
77 | count_t gets(chardev_t *chardev, char *buf, size_t buflen) |
77 | count_t gets(chardev_t *chardev, char *buf, size_t buflen) |
78 | { |
78 | { |
79 | index_t index = 0; |
79 | index_t index = 0; |
80 | char ch; |
80 | char ch; |
81 | 81 | ||
82 | while (index < buflen) { |
82 | while (index < buflen) { |
83 | ch = _getc(chardev); |
83 | ch = _getc(chardev); |
84 | if (ch == '\b') { |
84 | if (ch == '\b') { |
85 | if (index > 0) { |
85 | if (index > 0) { |
86 | index--; |
86 | index--; |
87 | /* Space backspace, space */ |
87 | /* Space backspace, space */ |
88 | putchar('\b'); |
88 | putchar('\b'); |
89 | putchar(' '); |
89 | putchar(' '); |
90 | putchar('\b'); |
90 | putchar('\b'); |
91 | } |
91 | } |
92 | continue; |
92 | continue; |
93 | } |
93 | } |
94 | putchar(ch); |
94 | putchar(ch); |
95 | 95 | ||
96 | if (ch == '\n') { /* end of string => write 0, return */ |
96 | if (ch == '\n') { /* end of string => write 0, return */ |
97 | buf[index] = '\0'; |
97 | buf[index] = '\0'; |
98 | return (count_t) index; |
98 | return (count_t) index; |
99 | } |
99 | } |
100 | buf[index++] = ch; |
100 | buf[index++] = ch; |
101 | } |
101 | } |
102 | return (count_t) index; |
102 | return (count_t) index; |
103 | } |
103 | } |
104 | 104 | ||
105 | /** Get character from device & echo it to screen */ |
105 | /** Get character from device & echo it to screen */ |
106 | __u8 getc(chardev_t *chardev) |
106 | __u8 getc(chardev_t *chardev) |
107 | { |
107 | { |
108 | __u8 ch; |
108 | __u8 ch; |
109 | 109 | ||
110 | ch = _getc(chardev); |
110 | ch = _getc(chardev); |
111 | putchar(ch); |
111 | putchar(ch); |
112 | return ch; |
112 | return ch; |
113 | } |
113 | } |
114 | 114 | ||
115 | void putchar(char c) |
115 | void putchar(char c) |
116 | { |
116 | { |
117 | stdout->op->write(stdout, c); |
117 | stdout->op->write(stdout, c); |
118 | } |
118 | } |
119 | 119 |