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authorRandy Dunlap <rdunlap@xenotime.net>2006-05-21 23:57:42 -0400
committerDominik Brodowski <linux@dominikbrodowski.net>2006-06-30 16:09:10 -0400
commitd29693bf10f376870d9bfd34bde80dd061cc4575 (patch)
tree03979ead72d5d7813ca26789aa8c3c22752343d1 /Documentation
parentfec21889cd6ef5e604b410c08b50a8c1522d74d4 (diff)
[PATCH] pcmcia: expose tool in pcmcia/Documentation/pcmcia/
Expose example and tool source files in the Documentation/ directory in their own files instead of being buried (almost hidden) in readme/txt files. This will make them more visible/usable to users who may need to use them, to developers who may need to test with them, and to janitors who would update them if they were more visible. Also, if any of these possibly should not be in the kernel tree at all, it will be clearer that they are here and we can discuss if they should be removed. Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/pcmcia/crc32hash.c32
-rw-r--r--Documentation/pcmcia/devicetable.txt36
2 files changed, 35 insertions, 33 deletions
diff --git a/Documentation/pcmcia/crc32hash.c b/Documentation/pcmcia/crc32hash.c
new file mode 100644
index 000000000000..cbc36d299af8
--- /dev/null
+++ b/Documentation/pcmcia/crc32hash.c
@@ -0,0 +1,32 @@
1/* crc32hash.c - derived from linux/lib/crc32.c, GNU GPL v2 */
2/* Usage example:
3$ ./crc32hash "Dual Speed"
4*/
5
6#include <string.h>
7#include <stdio.h>
8#include <ctype.h>
9#include <stdlib.h>
10
11unsigned int crc32(unsigned char const *p, unsigned int len)
12{
13 int i;
14 unsigned int crc = 0;
15 while (len--) {
16 crc ^= *p++;
17 for (i = 0; i < 8; i++)
18 crc = (crc >> 1) ^ ((crc & 1) ? 0xedb88320 : 0);
19 }
20 return crc;
21}
22
23int main(int argc, char **argv) {
24 unsigned int result;
25 if (argc != 2) {
26 printf("no string passed as argument\n");
27 return -1;
28 }
29 result = crc32(argv[1], strlen(argv[1]));
30 printf("0x%x\n", result);
31 return 0;
32}
diff --git a/Documentation/pcmcia/devicetable.txt b/Documentation/pcmcia/devicetable.txt
index 3351c0355143..199afd100cf2 100644
--- a/Documentation/pcmcia/devicetable.txt
+++ b/Documentation/pcmcia/devicetable.txt
@@ -27,37 +27,7 @@ pcmcia:m0149cC1ABf06pfn00fn00pa725B842DpbF1EFEE84pc0877B627pd00000000
27The hex value after "pa" is the hash of product ID string 1, after "pb" for 27The hex value after "pa" is the hash of product ID string 1, after "pb" for
28string 2 and so on. 28string 2 and so on.
29 29
30Alternatively, you can use this small tool to determine the crc32 hash. 30Alternatively, you can use crc32hash (see Documentation/pcmcia/crc32hash.c)
31simply pass the string you want to evaluate as argument to this program, 31to determine the crc32 hash. Simply pass the string you want to evaluate
32e.g. 32as argument to this program, e.g.:
33$ ./crc32hash "Dual Speed" 33$ ./crc32hash "Dual Speed"
34
35-------------------------------------------------------------------------
36/* crc32hash.c - derived from linux/lib/crc32.c, GNU GPL v2 */
37#include <string.h>
38#include <stdio.h>
39#include <ctype.h>
40#include <stdlib.h>
41
42unsigned int crc32(unsigned char const *p, unsigned int len)
43{
44 int i;
45 unsigned int crc = 0;
46 while (len--) {
47 crc ^= *p++;
48 for (i = 0; i < 8; i++)
49 crc = (crc >> 1) ^ ((crc & 1) ? 0xedb88320 : 0);
50 }
51 return crc;
52}
53
54int main(int argc, char **argv) {
55 unsigned int result;
56 if (argc != 2) {
57 printf("no string passed as argument\n");
58 return -1;
59 }
60 result = crc32(argv[1], strlen(argv[1]));
61 printf("0x%x\n", result);
62 return 0;
63}