WebSVN – HelenOS-historic – Diff – /kernel/trunk/generic/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>
#include <arch/asm.h>
 
#include <arch.h>
 
static char digits[] = "0123456789abcdef";  /**< Hexadecimal characters */
SPINLOCK_INITIALIZE(printflock);        /**< printf spinlock */
 
 
/** Print NULL terminated string
 *
 * Print characters from str using putchar() until
 * \\0 character is reached.
 *
 * @param str Characters to print.
 *
 */
static void print_str(const char *str)
{
    int i = 0;
    char c;
   
    while ((c = str[i++]))
        putchar(c);
}
 
 
/** Print hexadecimal digits
 *
 * Print fixed count of hexadecimal digits from
 * the number num. The digits are printed in
 * natural left-to-right order starting with
 * the width-th digit.
 *
 * @param num   Number containing digits.
 * @param width Count of digits to print.
 *
 */
static void print_fixed_hex(const __u64 num, const int width)
{
    int i;
   
    for (i = width*8 - 4; i >= 0; i -= 4)
        putchar(digits[(num>>i) & 0xf]);
}
 
 
/** Print number in given base
 *
 * Print significant digits of a number in given
 * base.
 *
 * @param num  Number to print.
 * @param base Base to print the number in (should
 *             be in range 2 .. 16).
 *
 */
static void print_number(const __native num, const unsigned int base)
{
    int val = num;
    char d[sizeof(__native)*8+1];       /* this is good enough even for base == 2 */
    int i = sizeof(__native)*8-1;
   
    do {
        d[i--] = digits[val % base];
    } while (val /= base);
   
    d[sizeof(__native)*8] = 0; 
    print_str(&d[i + 1]);
}
 
 
 
/** General formatted text print
 *
 * Print text formatted according the fmt parameter
 * and variant arguments. Each formatting directive
 * begins with \% (percentage) character and one of the
 * following character:
 *
 * \%    Prints the percentage character.
 *
 * s    The next variant argument is treated as char*
 *      and printed as a NULL terminated string.
 *
 * c    The next variant argument is treated as a single char.
 *
 * p    The next variant argument is treated as a maximum
 *      bit-width integer with respect to architecture
 *      and printed in full hexadecimal width.
 *
 * P    As with 'p', but '0x' is prefixed.
 *
 * q    The next variant argument is treated as a 64b integer
 *      and printed in full hexadecimal width.
 *
 * Q    As with 'q', but '0x' is prefixed.
 *
 * l    The next variant argument is treated as a 32b integer
 *      and printed in full hexadecimal width.
 *
 * L    As with 'l', but '0x' is prefixed.
 *
 * w    The next variant argument is treated as a 16b integer
 *      and printed in full hexadecimal width.
 *
 * W    As with 'w', but '0x' is prefixed.
 *
 * b    The next variant argument is treated as a 8b integer
 *      and printed in full hexadecimal width.
 *
 * B    As with 'b', but '0x' is prefixed.
 *
 * d    The next variant argument is treated as integer
 *      and printed in standard decimal format (only significant
 *      digits).
 *
 * x    The next variant argument is treated as integer
 *      and printed in standard hexadecimal format (only significant
 *      digits).
 *
 * X    As with 'x', but '0x' is prefixed.
 *
 
 
 
 
 * All other characters from fmt except the formatting directives
 * are printed in verbatim.
 *
 * @param fmt Formatting NULL terminated string.
 */
void printf(const char *fmt, ...)
{
    int irqpri, i = 0;
    va_list ap;
    char c;
   
    va_start(ap, fmt);
 
    irqpri = interrupts_disable();
    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 = (char) va_arg(ap, int);
                break;
 
                /*
                     * Hexadecimal conversions with fixed width.
                     */
                case 'P':
                print_str("0x");
                case 'p':
                    print_fixed_hex(va_arg(ap, __native), sizeof(__native));
                goto loop;
 
                case 'Q':
                print_str("0x");
                case 'q':
                    print_fixed_hex(va_arg(ap, __u64), INT64);
                goto loop;
 
                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);
    interrupts_restore(irqpri);
   
    va_end(ap);
}
 

Rev 674	Rev 675
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>	32	#include <arch/arg.h>
33	#include <arch/asm.h>	33	#include <arch/asm.h>
34		34
35	#include <arch.h>	35	#include <arch.h>
36		36
37	static char digits[] = "0123456789abcdef"; /*< Hexadecimal characters /	37	static char digits[] = "0123456789abcdef"; /*< Hexadecimal characters /
38	SPINLOCK_INITIALIZE(printflock); /*< printf spinlock /	38	SPINLOCK_INITIALIZE(printflock); /*< printf spinlock /
39		39
40		40
41	/** Print NULL terminated string	41	/** Print NULL terminated string
42	*	42	*
43	* Print characters from str using putchar() until	43	* Print characters from str using putchar() until
44	* \\0 character is reached.	44	* \\0 character is reached.
45	*	45	*
46	* @param str Characters to print.	46	* @param str Characters to print.
47	*	47	*
48	*/	48	*/
49	static void print_str(const char *str)	49	static void print_str(const char *str)
50	{	50	{
51	int i = 0;	51	int i = 0;
52	char c;	52	char c;
53		53
54	while ((c = str[i++]))	54	while ((c = str[i++]))
55	putchar(c);	55	putchar(c);
56	}	56	}
57		57
58		58
59	/** Print hexadecimal digits	59	/** Print hexadecimal digits
60	*	60	*
61	* Print fixed count of hexadecimal digits from	61	* Print fixed count of hexadecimal digits from
62	* the number num. The digits are printed in	62	* the number num. The digits are printed in
63	* natural left-to-right order starting with	63	* natural left-to-right order starting with
64	* the width-th digit.	64	* the width-th digit.
65	*	65	*
66	* @param num Number containing digits.	66	* @param num Number containing digits.
67	* @param width Count of digits to print.	67	* @param width Count of digits to print.
68	*	68	*
69	*/	69	*/
70	static void print_fixed_hex(const __u64 num, const int width)	70	static void print_fixed_hex(const __u64 num, const int width)
71	{	71	{
72	int i;	72	int i;
73		73
74	for (i = width*8 - 4; i >= 0; i -= 4)	74	for (i = width*8 - 4; i >= 0; i -= 4)
75	putchar(digits[(num>>i) & 0xf]);	75	putchar(digits[(num>>i) & 0xf]);
76	}	76	}
77		77
78		78
79	/** Print number in given base	79	/** Print number in given base
80	*	80	*
81	* Print significant digits of a number in given	81	* Print significant digits of a number in given
82	* base.	82	* base.
83	*	83	*
84	* @param num Number to print.	84	* @param num Number to print.
85	* @param base Base to print the number in (should	85	* @param base Base to print the number in (should
86	* be in range 2 .. 16).	86	* be in range 2 .. 16).
87	*	87	*
88	*/	88	*/
89	static void print_number(const __native num, const unsigned int base)	89	static void print_number(const __native num, const unsigned int base)
90	{	90	{
91	int val = num;	91	int val = num;
92	char d[sizeof(__native)8+1]; / this is good enough even for base == 2 */	92	char d[sizeof(__native)8+1]; / this is good enough even for base == 2 */
93	int i = sizeof(__native)*8-1;	93	int i = sizeof(__native)*8-1;
94		94
95	do {	95	do {
96	d[i--] = digits[val % base];	96	d[i--] = digits[val % base];
97	} while (val /= base);	97	} while (val /= base);
98		98
99	d[sizeof(__native)*8] = 0;	99	d[sizeof(__native)*8] = 0;
100	print_str(&d[i + 1]);	100	print_str(&d[i + 1]);
101	}	101	}
102		102
103		103
104		104
105	/** General formatted text print	105	/** General formatted text print
106	*	106	*
107	* Print text formatted according the fmt parameter	107	* Print text formatted according the fmt parameter
108	* and variant arguments. Each formatting directive	108	* and variant arguments. Each formatting directive
109	* begins with \% (percentage) character and one of the	109	* begins with \% (percentage) character and one of the
110	* following character:	110	* following character:
111	*	111	*
112	* \% Prints the percentage character.	112	* \% Prints the percentage character.
113	*	113	*
114	* s The next variant argument is treated as char*	114	* s The next variant argument is treated as char*
115	* and printed as a NULL terminated string.	115	* and printed as a NULL terminated string.
116	*	116	*
117	* c The next variant argument is treated as a single char.	117	* c The next variant argument is treated as a single char.
118	*	118	*
119	* p The next variant argument is treated as a maximum	119	* p The next variant argument is treated as a maximum
120	* bit-width integer with respect to architecture	120	* bit-width integer with respect to architecture
121	* and printed in full hexadecimal width.	121	* and printed in full hexadecimal width.
122	*	122	*
123	* P As with 'p', but '0x' is prefixed.	123	* P As with 'p', but '0x' is prefixed.
124	*	124	*
125	* q The next variant argument is treated as a 64b integer	125	* q The next variant argument is treated as a 64b integer
126	* and printed in full hexadecimal width.	126	* and printed in full hexadecimal width.
127	*	127	*
128	* Q As with 'q', but '0x' is prefixed.	128	* Q As with 'q', but '0x' is prefixed.
129	*	129	*
130	* l The next variant argument is treated as a 32b integer	130	* l The next variant argument is treated as a 32b integer
131	* and printed in full hexadecimal width.	131	* and printed in full hexadecimal width.
132	*	132	*
133	* L As with 'l', but '0x' is prefixed.	133	* L As with 'l', but '0x' is prefixed.
134	*	134	*
135	* w The next variant argument is treated as a 16b integer	135	* w The next variant argument is treated as a 16b integer
136	* and printed in full hexadecimal width.	136	* and printed in full hexadecimal width.
137	*	137	*
138	* W As with 'w', but '0x' is prefixed.	138	* W As with 'w', but '0x' is prefixed.
139	*	139	*
140	* b The next variant argument is treated as a 8b integer	140	* b The next variant argument is treated as a 8b integer
141	* and printed in full hexadecimal width.	141	* and printed in full hexadecimal width.
142	*	142	*
143	* B As with 'b', but '0x' is prefixed.	143	* B As with 'b', but '0x' is prefixed.
144	*	144	*
145	* d The next variant argument is treated as integer	145	* d The next variant argument is treated as integer
146	* and printed in standard decimal format (only significant	146	* and printed in standard decimal format (only significant
147	* digits).	147	* digits).
148	*	148	*
149	* x The next variant argument is treated as integer	149	* x The next variant argument is treated as integer
150	* and printed in standard hexadecimal format (only significant	150	* and printed in standard hexadecimal format (only significant
151	* digits).	151	* digits).
152	*	152	*
153	* X As with 'x', but '0x' is prefixed.	153	* X As with 'x', but '0x' is prefixed.
154	*	154	*
155	* . The decimal number following period will be treated as precision	-
156	* for printing floating point numbers. One of 'e', 'E', 'f' or 'F'	-
157	* must follow.	-
158	*	-
159	* All other characters from fmt except the formatting directives	155	* All other characters from fmt except the formatting directives
160	* are printed in verbatim.	156	* are printed in verbatim.
161	*	157	*
162	* @param fmt Formatting NULL terminated string.	158	* @param fmt Formatting NULL terminated string.
163	*/	159	*/
164	void printf(const char *fmt, ...)	160	void printf(const char *fmt, ...)
165	{	161	{
166	int irqpri, i = 0;	162	int irqpri, i = 0;
167	va_list ap;	163	va_list ap;
168	char c;	164	char c;
169		165
170	va_start(ap, fmt);	166	va_start(ap, fmt);
171		167
172	irqpri = interrupts_disable();	168	irqpri = interrupts_disable();
173	spinlock_lock(&printflock);	169	spinlock_lock(&printflock);
174		170
175	while ((c = fmt[i++])) {	171	while ((c = fmt[i++])) {
176	switch (c) {	172	switch (c) {
177		173
178	/* control character */	174	/* control character */
179	case '%':	175	case '%':
180		176
181	switch (c = fmt[i++]) {	177	switch (c = fmt[i++]) {
182		178
183	/* percentile itself */	179	/* percentile itself */
184	case '%':	180	case '%':
185	break;	181	break;
186		182
187	/*	183	/*
188	* String and character conversions.	184	* String and character conversions.
189	*/	185	*/
190	case 's':	186	case 's':
191	print_str(va_arg(ap, char_ptr));	187	print_str(va_arg(ap, char_ptr));
192	goto loop;	188	goto loop;
193		189
194	case 'c':	190	case 'c':
195	c = (char) va_arg(ap, int);	191	c = (char) va_arg(ap, int);
196	break;	192	break;
197		193
198	/*	194	/*
199	* Hexadecimal conversions with fixed width.	195	* Hexadecimal conversions with fixed width.
200	*/	196	*/
201	case 'P':	197	case 'P':
202	print_str("0x");	198	print_str("0x");
203	case 'p':	199	case 'p':
204	print_fixed_hex(va_arg(ap, __native), sizeof(__native));	200	print_fixed_hex(va_arg(ap, __native), sizeof(__native));
205	goto loop;	201	goto loop;
206		202
207	case 'Q':	203	case 'Q':
208	print_str("0x");	204	print_str("0x");
209	case 'q':	205	case 'q':
210	print_fixed_hex(va_arg(ap, __u64), INT64);	206	print_fixed_hex(va_arg(ap, __u64), INT64);
211	goto loop;	207	goto loop;
212		208
213	case 'L':	209	case 'L':
214	print_str("0x");	210	print_str("0x");
215	case 'l':	211	case 'l':
216	print_fixed_hex(va_arg(ap, __native), INT32);	212	print_fixed_hex(va_arg(ap, __native), INT32);
217	goto loop;	213	goto loop;
218		214
219	case 'W':	215	case 'W':
220	print_str("0x");	216	print_str("0x");
221	case 'w':	217	case 'w':
222	print_fixed_hex(va_arg(ap, __native), INT16);	218	print_fixed_hex(va_arg(ap, __native), INT16);
223	goto loop;	219	goto loop;
224		220
225	case 'B':	221	case 'B':
226	print_str("0x");	222	print_str("0x");
227	case 'b':	223	case 'b':
228	print_fixed_hex(va_arg(ap, __native), INT8);	224	print_fixed_hex(va_arg(ap, __native), INT8);
229	goto loop;	225	goto loop;
230		226
231	/*	227	/*
232	* Decimal and hexadecimal conversions.	228	* Decimal and hexadecimal conversions.
233	*/	229	*/
234	case 'd':	230	case 'd':
235	print_number(va_arg(ap, __native), 10);	231	print_number(va_arg(ap, __native), 10);
236	goto loop;	232	goto loop;
237		233
238	case 'X':	234	case 'X':
239	print_str("0x");	235	print_str("0x");
240	case 'x':	236	case 'x':
241	print_number(va_arg(ap, __native), 16);	237	print_number(va_arg(ap, __native), 16);
242	goto loop;	238	goto loop;
243		239
244	/*	240	/*
245	* Bad formatting.	241	* Bad formatting.
246	*/	242	*/
247	default:	243	default:
248	goto out;	244	goto out;
249	}	245	}
250		246
251	default: putchar(c);	247	default: putchar(c);
252	}	248	}
253		249
254	loop:	250	loop:
255	;	251	;
256	}	252	}
257		253
258	out:	254	out:
259	spinlock_unlock(&printflock);	255	spinlock_unlock(&printflock);
260	interrupts_restore(irqpri);	256	interrupts_restore(irqpri);
261		257
262	va_end(ap);	258	va_end(ap);
263	}	259	}
264		260

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(root)/kernel/trunk/generic/src/debug/print.c – Rev 674 → 675