WebSVN – HelenOS-historic – Diff – /kernel/trunk/generic/src/lib/memstr.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 <memstr.h>
#include <arch/types.h>
 
 
/** Copy block of memory
 *
 * Copy cnt bytes from src address to dst address.
 * The copying is done byte-by-byte. The source
 * and destination memory areas cannot overlap.
 *
 * @param src Origin address to copy from.
 * @param dst Origin address to copy to.
 * @param cnt Number of bytes to copy.
 *
 */
char *_memcopy(void * dst, const void *src, size_t cnt)
{
    int i;
   
    for (i=0; i<cnt; i++)
        *((__u8 *) (dst + i)) = *((__u8 *) (src + i));
       
    return (char *)src;
}
 
 
/** Fill block of memory
 *
 * Fill cnt bytes at dst address with the value x.
 * The filling is done byte-by-byte.
 *
 * @param dst Origin address to fill.
 * @param cnt Number of bytes to fill.
 * @param x   Value to fill.
 *
 */
void _memsetb(__address dst, size_t cnt, __u8 x)
{
    int i;
    __u8 *p = (__u8 *) dst;
   
    for(i=0; i<cnt; i++)
        p[i] = x;
}
 
/** Fill block of memory
 *
 * Fill cnt words at dst address with the value x.
 * The filling is done word-by-word.
 *
 * @param dst Origin address to fill.
 * @param cnt Number of words to fill.
 * @param x   Value to fill.
 *
 */
void _memsetw(__address dst, size_t cnt, __u16 x)
{
    int i;
    __u16 *p = (__u16 *) dst;
   
    for(i=0; i<cnt; i++)
        p[i] = x;  
}
 

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/src/lib/memstr.c @ 1757 – Rev 200 → 202

Rev 200		Rev 202
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 <memstr.h>	29	#include <memstr.h>
30	#include <arch/types.h>	30	#include <arch/types.h>
31		31
32		32
33	/** Copy block of memory	33	/** Copy block of memory
34	*	34	*
35	* Copy cnt bytes from src address to dst address.	35	* Copy cnt bytes from src address to dst address.
36	* The copying is done byte-by-byte. The source	36	* The copying is done byte-by-byte. The source
37	* and destination memory areas cannot overlap.	37	* and destination memory areas cannot overlap.
38	*	38	*
39	* @param src Origin address to copy from.	39	* @param src Origin address to copy from.
40	* @param dst Origin address to copy to.	40	* @param dst Origin address to copy to.
41	* @param cnt Number of bytes to copy.	41	* @param cnt Number of bytes to copy.
42	*	42	*
43	*/	43	*/
44	char _memcopy(void dst, const void *src, size_t cnt)	44	char _memcopy(void dst, const void *src, size_t cnt)
45	{	45	{
46	int i;	46	int i;
47		47
48	for (i=0; i<cnt; i++)	48	for (i=0; i<cnt; i++)
49	((__u8 ) (dst + i)) = ((__u8 ) (src + i));	49	((__u8 ) (dst + i)) = ((__u8 ) (src + i));
50		50
51	return (char *)src;	51	return (char *)src;
52	}	52	}
53		53
54		54
55	/** Fill block of memory	55	/** Fill block of memory
56	*	56	*
57	* Fill cnt bytes at dst address with the value x.	57	* Fill cnt bytes at dst address with the value x.
58	* The filling is done byte-by-byte.	58	* The filling is done byte-by-byte.
59	*	59	*
60	* @param dst Origin address to fill.	60	* @param dst Origin address to fill.
61	* @param cnt Number of bytes to fill.	61	* @param cnt Number of bytes to fill.
62	* @param x Value to fill.	62	* @param x Value to fill.
63	*	63	*
64	*/	64	*/
65	void _memsetb(__address dst, size_t cnt, __u8 x)	65	void _memsetb(__address dst, size_t cnt, __u8 x)
66	{	66	{
67	int i;	67	int i;
68	__u8 p = (__u8 ) dst;	68	__u8 p = (__u8 ) dst;
69		69
70	for(i=0; i<cnt; i++)	70	for(i=0; i<cnt; i++)
71	p[i] = x;	71	p[i] = x;
72	}	72	}
73		73
74	/** Fill block of memory	74	/** Fill block of memory
75	*	75	*
76	* Fill cnt words at dst address with the value x.	76	* Fill cnt words at dst address with the value x.
77	* The filling is done word-by-word.	77	* The filling is done word-by-word.
78	*	78	*
79	* @param dst Origin address to fill.	79	* @param dst Origin address to fill.
80	* @param cnt Number of words to fill.	80	* @param cnt Number of words to fill.
81	* @param x Value to fill.	81	* @param x Value to fill.
82	*	82	*
83	*/	83	*/
84	void _memsetw(__address dst, size_t cnt, __u16 x)	84	void _memsetw(__address dst, size_t cnt, __u16 x)
85	{	85	{
86	int i;	86	int i;
87	__u8 p = (__u8 ) dst;	87	__u16 p = (__u16 ) dst;
88		88
89	for(i=0; i<cnt; i++)	89	for(i=0; i<cnt; i++)
90	p[i] = x;	90	p[i] = x;
91	}	91	}
92		92