WebSVN – HelenOS-historic – Diff – /kernel/trunk/generic/src/console/console.c


/*
 * Copyright (C) 2003 Josef Cejka
 * Copyright (C) 2005 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#include <console/console.h>
#include <console/chardev.h>
#include <synch/waitq.h>
#include <synch/spinlock.h>
#include <arch/types.h>
#include <typedefs.h>
#include <arch.h>
#include <func.h>
#include <print.h>
 
/** Standard input character device. */
chardev_t *stdin = NULL;
chardev_t *stdout = NULL;
 
/** Get character from character device. Do not echo character.
 *
 * @param chardev Character device.
 *
 * @return Character read.
 */
__u8 _getc(chardev_t *chardev)
{
    __u8 ch;
    ipl_t ipl;
 
    if (haltstate) {
        /* If we are here, we are hopefully on the processor, that
         * issued the 'halt' command, so proceed to read the character
         * directly from input
         */
        if (chardev->op->read)
            return chardev->op->read(chardev);
        /* no other way of interacting with user, halt */
        printf("cpu: halted - no kconsole\n");
        cpu_halt();
    }
 
    waitq_sleep(&chardev->wq);
    ipl = interrupts_disable();
    spinlock_lock(&chardev->lock);
    ch = chardev->buffer[(chardev->index - chardev->counter) % CHARDEV_BUFLEN];
    chardev->counter--;
    spinlock_unlock(&chardev->lock);
    interrupts_restore(ipl);
 
    chardev->op->resume(chardev);
 
    return ch;
}
 
/** Get string from character device.
 *
 * Read characters from character device until first occurrence
 * of newline character.
 *
 * @param chardev Character device.
 * @param buf Buffer where to store string terminated by '\0'.
 * @param len Size of the buffer.
 *
 * @return Number of characters read.
 */
count_t gets(chardev_t *chardev, char *buf, size_t buflen)
{
    index_t index = 0;
    char ch;
 
    while (index < buflen) {
        ch = _getc(chardev);
        if (ch == '\b') {
            if (index > 0) {
                index--;
                /* Space backspace, space */
                putchar('\b');
                putchar(' ');
                putchar('\b');
            }
            continue;
        }
        putchar(ch);
 
        if (ch == '\n') { /* end of string => write 0, return */
            buf[index] = '\0';
            return (count_t) index;
        }
        buf[index++] = ch;
    }
    return (count_t) index;
}
 
/** Get character from device & echo it to screen */
__u8 getc(chardev_t *chardev)
{
    __u8 ch;
 
    ch = _getc(chardev);
    putchar(ch);
    return ch;
}
 
void putchar(char c)
{
    if (stdout->op->write)
        stdout->op->write(stdout, c);
}
 

Rev 601	Rev 607
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	#include <func.h>
-		38	#include <print.h>
37		39
38	/** Standard input character device. */	40	/** Standard input character device. */
39	chardev_t *stdin = NULL;	41	chardev_t *stdin = NULL;
40	chardev_t *stdout = NULL;	42	chardev_t *stdout = NULL;
41		43
42	/** Get character from character device. Do not echo character.	44	/** Get character from character device. Do not echo character.
43	*	45	*
44	* @param chardev Character device.	46	* @param chardev Character device.
45	*	47	*
46	* @return Character read.	48	* @return Character read.
47	*/	49	*/
48	__u8 _getc(chardev_t *chardev)	50	__u8 _getc(chardev_t *chardev)
49	{	51	{
50	__u8 ch;	52	__u8 ch;
51	ipl_t ipl;	53	ipl_t ipl;
52		54
-		55	if (haltstate) {
-		56	/* If we are here, we are hopefully on the processor, that
-		57	* issued the 'halt' command, so proceed to read the character
-		58	* directly from input
-		59	*/
-		60	if (chardev->op->read)
-		61	return chardev->op->read(chardev);
-		62	/* no other way of interacting with user, halt */
-		63	printf("cpu: halted - no kconsole\n");
-		64	cpu_halt();
-		65	}
-		66
53	waitq_sleep(&chardev->wq);	67	waitq_sleep(&chardev->wq);
54	ipl = interrupts_disable();	68	ipl = interrupts_disable();
55	spinlock_lock(&chardev->lock);	69	spinlock_lock(&chardev->lock);
56	ch = chardev->buffer[(chardev->index - chardev->counter) % CHARDEV_BUFLEN];	70	ch = chardev->buffer[(chardev->index - chardev->counter) % CHARDEV_BUFLEN];
57	chardev->counter--;	71	chardev->counter--;
58	spinlock_unlock(&chardev->lock);	72	spinlock_unlock(&chardev->lock);
59	interrupts_restore(ipl);	73	interrupts_restore(ipl);
60		74
61	chardev->op->resume(chardev);	75	chardev->op->resume(chardev);
62		76
63	return ch;	77	return ch;
64	}	78	}
65		79
66	/** Get string from character device.	80	/** Get string from character device.
67	*	81	*
68	* Read characters from character device until first occurrence	82	* Read characters from character device until first occurrence
69	* of newline character.	83	* of newline character.
70	*	84	*
71	* @param chardev Character device.	85	* @param chardev Character device.
72	* @param buf Buffer where to store string terminated by '\0'.	86	* @param buf Buffer where to store string terminated by '\0'.
73	* @param len Size of the buffer.	87	* @param len Size of the buffer.
74	*	88	*
75	* @return Number of characters read.	89	* @return Number of characters read.
76	*/	90	*/
77	count_t gets(chardev_t chardev, char buf, size_t buflen)	91	count_t gets(chardev_t chardev, char buf, size_t buflen)
78	{	92	{
79	index_t index = 0;	93	index_t index = 0;
80	char ch;	94	char ch;
81		95
82	while (index < buflen) {	96	while (index < buflen) {
83	ch = _getc(chardev);	97	ch = _getc(chardev);
84	if (ch == '\b') {	98	if (ch == '\b') {
85	if (index > 0) {	99	if (index > 0) {
86	index--;	100	index--;
87	/* Space backspace, space */	101	/* Space backspace, space */
88	putchar('\b');	102	putchar('\b');
89	putchar(' ');	103	putchar(' ');
90	putchar('\b');	104	putchar('\b');
91	}	105	}
92	continue;	106	continue;
93	}	107	}
94	putchar(ch);	108	putchar(ch);
95		109
96	if (ch == '\n') { /* end of string => write 0, return */	110	if (ch == '\n') { /* end of string => write 0, return */
97	buf[index] = '\0';	111	buf[index] = '\0';
98	return (count_t) index;	112	return (count_t) index;
99	}	113	}
100	buf[index++] = ch;	114	buf[index++] = ch;
101	}	115	}
102	return (count_t) index;	116	return (count_t) index;
103	}	117	}
104		118
105	/** Get character from device & echo it to screen */	119	/** Get character from device & echo it to screen */
106	__u8 getc(chardev_t *chardev)	120	__u8 getc(chardev_t *chardev)
107	{	121	{
108	__u8 ch;	122	__u8 ch;
109		123
110	ch = _getc(chardev);	124	ch = _getc(chardev);
111	putchar(ch);	125	putchar(ch);
112	return ch;	126	return ch;
113	}	127	}
114		128
115	void putchar(char c)	129	void putchar(char c)
116	{	130	{
-		131	if (stdout->op->write)
117	stdout->op->write(stdout, c);	132	stdout->op->write(stdout, c);
118	}	133	}
119		134

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/src/console/console.c – Rev 601 → 607