WebSVN – HelenOS – Diff – /SPARTAN/trunk/src/debug/print.c


/*
 * Copyright (C) 2001-2004 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 <putchar.h>
#include <print.h>
#include <synch/spinlock.h>
#include <arch/arg.h>
 
 
static char digits[] = "0123456789abcdef";
static spinlock_t printflock;
 
void print_str(char *str)
{
        int i = 0;
    char c;
   
    while (c = str[i++])
        putchar(c);
}
 
 
/*
 * This is a universal function for printing hexadecimal numbers of fixed
 * width.
 */
void print_fixed_hex(__u32 num, int width)
{
    int i;
   
    for (i = width*8 - 4; i >= 0; i -= 4)
        putchar(digits[(num>>i) & 0xf]);
}
 
/*
 * This is a universal function for printing decimal and hexadecimal numbers.
 * It prints only significant digits.
 */
void print_number(__u32 num, int base)
{
    char d[32+1];       /* this is good enough even for base == 2 */
        int i = 31;
   
    do {
        d[i--] = digits[num % base];
    } while (num /= base);
   
    d[32] = 0; 
    print_str(&d[i + 1]);
}
 
/*
 * This is our function for printing formatted text.
 * It's much simpler than the user-space one.
 * We are greateful for this function.
 */
void printf(char *fmt, ...)
{
    int irqpri, i = 0;
    va_list ap;
    char c;
 
    va_start(ap, fmt);
 
    irqpri = cpu_priority_high();
    spinlock_lock(&printflock);
 
    while (c = fmt[i++]) {
        switch (c) {
 
            /* control character */
            case '%':
                switch (c = fmt[i++]) {
 
                /* percentile itself */
                case '%':
                    break;
 
                /*
                 * String and character conversions.
                 */
                case 's':
                    print_str(va_arg(ap, char_ptr));
                    goto loop;
 
                case 'c':
                    c = va_arg(ap, char);
                    break;
 
                /*
                         * Hexadecimal conversions with fixed width.
                         */
                case 'L':
                    print_str("0x");
                case 'l':
                        print_fixed_hex(va_arg(ap, __native), INT32);
                    goto loop;
 
                case 'W':
                    print_str("0x");
                case 'w':
                        print_fixed_hex(va_arg(ap, __native), INT16);
                    goto loop;
 
                case 'B':
                    print_str("0x");
                case 'b':
                        print_fixed_hex(va_arg(ap, __native), INT8);
                    goto loop;
 
                /*
                         * Decimal and hexadecimal conversions.
                         */
                case 'd':
                        print_number(va_arg(ap, __native), 10);
                    goto loop;
 
                case 'X':
                            print_str("0x");
                case 'x':
                        print_number(va_arg(ap, __native), 16);
                    goto loop;
       
                /*
                 * Bad formatting.
                 */
                default:
                    goto out;
                }
 
            default: putchar(c);
        }
   
loop:
        ;
    }
 
out:
    spinlock_unlock(&printflock);
    cpu_priority_restore(irqpri);
   
    va_end(ap);
}
 

Rev 1	Rev 40
1	/*	1	/*
2	* Copyright (C) 2001-2004 Jakub Jermar	2	* Copyright (C) 2001-2004 Jakub Jermar
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	#include <putchar.h>	29	#include <putchar.h>
30	#include <print.h>	30	#include <print.h>
31	#include <synch/spinlock.h>	31	#include <synch/spinlock.h>
-		32	#include <arch/arg.h>
-		33
32		34
33	static char digits[] = "0123456789abcdef";	35	static char digits[] = "0123456789abcdef";
34	static spinlock_t printflock;	36	static spinlock_t printflock;
35		37
36	void print_str(char *str)	38	void print_str(char *str)
37	{	39	{
38	int i = 0;	40	int i = 0;
39	char c;	41	char c;
40		42
41	while (c = str[i++])	43	while (c = str[i++])
42	putchar(c);	44	putchar(c);
43	}	45	}
44		46
45		47
46	/*	48	/*
47	* This is a universal function for printing hexadecimal numbers of fixed	49	* This is a universal function for printing hexadecimal numbers of fixed
48	* width.	50	* width.
49	*/	51	*/
50	void print_fixed_hex(__u32 num, int width)	52	void print_fixed_hex(__u32 num, int width)
51	{	53	{
52	int i;	54	int i;
53		55
54	for (i = width*8 - 4; i >= 0; i -= 4)	56	for (i = width*8 - 4; i >= 0; i -= 4)
55	putchar(digits[(num>>i) & 0xf]);	57	putchar(digits[(num>>i) & 0xf]);
56	}	58	}
57		59
58	/*	60	/*
59	* This is a universal function for printing decimal and hexadecimal numbers.	61	* This is a universal function for printing decimal and hexadecimal numbers.
60	* It prints only significant digits.	62	* It prints only significant digits.
61	*/	63	*/
62	void print_number(__u32 num, int base)	64	void print_number(__u32 num, int base)
63	{	65	{
64	char d[32+1]; /* this is good enough even for base == 2 */	66	char d[32+1]; /* this is good enough even for base == 2 */
65	int i = 31;	67	int i = 31;
66		68
67	do {	69	do {
68	d[i--] = digits[num % base];	70	d[i--] = digits[num % base];
69	} while (num /= base);	71	} while (num /= base);
70		72
71	d[32] = 0;	73	d[32] = 0;
72	print_str(&d[i + 1]);	74	print_str(&d[i + 1]);
73	}	75	}
74		76
75	/*	77	/*
76	* This is our function for printing formatted text.	78	* This is our function for printing formatted text.
77	* It's much simpler than the user-space one.	79	* It's much simpler than the user-space one.
78	* We are greateful for this function.	80	* We are greateful for this function.
79	*/	81	*/
80	void printf(char *fmt, ...)	82	void printf(char *fmt, ...)
81	{	83	{
82	int irqpri, i = 0, pos = 0;	84	int irqpri, i = 0;
-		85	va_list ap;
83	char c;	86	char c;
-		87
-		88	va_start(ap, fmt);
84		89
85	irqpri = cpu_priority_high();	90	irqpri = cpu_priority_high();
86	spinlock_lock(&printflock);	91	spinlock_lock(&printflock);
-		92
87	while (c = fmt[i++]) {	93	while (c = fmt[i++]) {
88	switch (c) {	94	switch (c) {
89		95
90	/* control character */	96	/* control character */
91	case '%':	97	case '%':
92	switch (c = fmt[i++]) {	98	switch (c = fmt[i++]) {
93		99
94	/* percentile itself */	100	/* percentile itself */
95	case '%':	101	case '%':
96	break;	102	break;
97		103
98	/*	104	/*
99	* String and character conversions.	105	* String and character conversions.
100	*/	106	*/
101	case 's':	107	case 's':
102	print_str((char ) (((__address *) &fmt + (++pos))));	108	print_str(va_arg(ap, char_ptr));
103	goto loop;	109	goto loop;
104		110
105	case 'c':	111	case 'c':
106	c = ((char ) ((__address *)(&fmt + (++pos))));	112	c = va_arg(ap, char);
107	break;	113	break;
108		114
109	/*	115	/*
110	* Hexadecimal conversions with fixed width.	116	* Hexadecimal conversions with fixed width.
111	*/	117	*/
112	case 'L':	118	case 'L':
113	print_str("0x");	119	print_str("0x");
114	case 'l':	120	case 'l':
115	print_fixed_hex(((__address )(&fmt + (++pos))),INT32);	121	print_fixed_hex(va_arg(ap, __native), INT32);
116	goto loop;	122	goto loop;
117		123
118	case 'W':	124	case 'W':
119	print_str("0x");	125	print_str("0x");
120	case 'w':	126	case 'w':
121	print_fixed_hex(((__address )(&fmt + (++pos))),INT16);	127	print_fixed_hex(va_arg(ap, __native), INT16);
122	goto loop;	128	goto loop;
123		129
124	case 'B':	130	case 'B':
125	print_str("0x");	131	print_str("0x");
126	case 'b':	132	case 'b':
127	print_fixed_hex(((__address )(&fmt + (++pos))),INT8);	133	print_fixed_hex(va_arg(ap, __native), INT8);
128	goto loop;	134	goto loop;
129		135
130	/*	136	/*
131	* Decimal and hexadecimal conversions.	137	* Decimal and hexadecimal conversions.
132	*/	138	*/
133	case 'd':	139	case 'd':
134	print_number(((__address )(&fmt + (++pos))), 10);	140	print_number(va_arg(ap, __native), 10);
135	goto loop;	141	goto loop;
136		142
137	case 'X':	143	case 'X':
138	print_str("0x");	144	print_str("0x");
139	case 'x':	145	case 'x':
140	print_number(((__address )(&fmt + (++pos))), 16);	146	print_number(va_arg(ap, __native), 16);
141	goto loop;	147	goto loop;
142		148
143	/*	149	/*
144	* Bad formatting.	150	* Bad formatting.
145	*/	151	*/
146	default:	152	default:
147	goto out;	153	goto out;
148	}	154	}
149		155
150	default: putchar(c);	156	default: putchar(c);
151	}	157	}
152		158
153	loop:	159	loop:
154	;	160	;
155	}	161	}
156		162
157	out:	163	out:
158	spinlock_unlock(&printflock);	164	spinlock_unlock(&printflock);
159	cpu_priority_restore(irqpri);	165	cpu_priority_restore(irqpri);
-		166
-		167	va_end(ap);
160	}	168	}
161		169

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(root)/SPARTAN/trunk/src/debug/print.c @ 255 – Rev 1 → 40