WebSVN – HelenOS – Diff – /branches/tracing/uspace/app/debug/cons.c


/*
 * Copyright (c) 2008 Jiri Svoboda
 * 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.
 */
 
/** @addtogroup debug
 * @{
 */
/** @file
 */
 
#include <stdio.h>
#include <stdlib.h>
 
#include "cons.h"
 
static char *line_buffer;
static int line_chars;
 
static int line_active = 0;
 
static void line_show(void)
{
    int i;
 
    printf("> ");
    for (i = 0; i < line_chars; ++i)
        putchar(line_buffer[i]);
}
 
static void line_hide(void)
{
    int i;
 
    printf("\b\b");
    for (i = 0; i < line_chars; ++i)
        putchar('\b');
}
 
void cons_printf(const char *fmt, ...)
{
    va_list ap;
 
    if (line_active) line_hide();
    va_start(ap, fmt);
    vprintf(fmt, ap);
    va_end(ap);
    if (line_active) line_show();
}
 
void cons_read_line(char *buffer, int n)
{
    char c;
 
 
    line_buffer = buffer;
    line_chars = 0;
 
    line_active = 1;
    line_show();
 
    line_chars = 0;
    while (line_chars < n - 1) {
        c = getchar();
        if (c == '\n') break;
        if (c == '\b') {
            if (line_chars > 0) {
                putchar('\b');
                --line_chars;
            }
            continue;
        }
       
        putchar(c);
        buffer[line_chars++] = c;
    }
 
    putchar('\n');
    buffer[line_chars] = '\0';
 
    line_active = 0;
}
 
/** @}
 */
 

Rev 2936	Rev 2946
1	/*	1	/*
2	* Copyright (c) 2008 Jiri Svoboda	2	* Copyright (c) 2008 Jiri Svoboda
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup debug	29	/** @addtogroup debug
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#include <stdio.h>	35	#include <stdio.h>
36	#include <stdlib.h>	36	#include <stdlib.h>
37		37
38	#include "cons.h"	38	#include "cons.h"
39		39
40	static char *line_buffer;	40	static char *line_buffer;
41	static int line_chars;	41	static int line_chars;
42		42
43	static int line_active = 0;	43	static int line_active = 0;
44		44
45	static void line_show(void)	45	static void line_show(void)
46	{	46	{
47	int i;	47	int i;
48		48
49	printf("> ");	49	printf("> ");
50	for (i = 0; i < line_chars; ++i)	50	for (i = 0; i < line_chars; ++i)
51	putchar(line_buffer[i]);	51	putchar(line_buffer[i]);
52	}	52	}
53		53
54	static void line_hide(void)	54	static void line_hide(void)
55	{	55	{
56	int i;	56	int i;
57		57
58	printf("\b\b");	58	printf("\b\b");
59	for (i = 0; i < line_chars; ++i)	59	for (i = 0; i < line_chars; ++i)
60	putchar('\b');	60	putchar('\b');
61	}	61	}
62		62
63	void cons_printf(const char *fmt, ...)	63	void cons_printf(const char *fmt, ...)
64	{	64	{
65	va_list ap;	65	va_list ap;
66		66
67	if (line_active) line_hide();	67	if (line_active) line_hide();
68	va_start(ap, fmt);	68	va_start(ap, fmt);
69	vprintf(fmt, ap);	69	vprintf(fmt, ap);
70	va_end(ap);	70	va_end(ap);
71	if (line_active) line_show();	71	if (line_active) line_show();
72	}	72	}
73		73
74	void cons_read_line(char *buffer, int n)	74	void cons_read_line(char *buffer, int n)
75	{	75	{
76	char c;	76	char c;
77	int i;	-
78		77
79	line_buffer = buffer;	78	line_buffer = buffer;
80	line_chars = 0;	79	line_chars = 0;
81		80
82	line_active = 1;	81	line_active = 1;
83	line_show();	82	line_show();
84		83
85	line_chars = 0;	84	line_chars = 0;
86	while (line_chars < n - 1) {	85	while (line_chars < n - 1) {
87	c = getchar();	86	c = getchar();
88	if (c == '\n') break;	87	if (c == '\n') break;
89	if (c == '\b') {	88	if (c == '\b') {
90	if (line_chars > 0) {	89	if (line_chars > 0) {
91	putchar('\b');	90	putchar('\b');
92	--line_chars;	91	--line_chars;
93	}	92	}
94	continue;	93	continue;
95	}	94	}
96		95
97	putchar(c);	96	putchar(c);
98	buffer[line_chars++] = c;	97	buffer[line_chars++] = c;
99	}	98	}
100		99
101	putchar('\n');	100	putchar('\n');
102	buffer[line_chars] = '\0';	101	buffer[line_chars] = '\0';
103		102
104	line_active = 0;	103	line_active = 0;
105	}	104	}
106		105
107	/** @}	106	/** @}
108	*/	107	*/
109		108

Subversion Repositories HelenOS

(root)/branches/tracing/uspace/app/debug/cons.c @ 4745 – Rev 2936 → 2946