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-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 0000000..cbc36d2
--- /dev/null
+++ b/Documentation/pcmcia/crc32hash.c
@@ -0,0 +1,32 @@
+/* crc32hash.c - derived from linux/lib/crc32.c, GNU GPL v2 */
+/* Usage example:
+$ ./crc32hash "Dual Speed"
+*/
+
+#include <string.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <stdlib.h>
+
+unsigned int crc32(unsigned char const *p, unsigned int len)
+{
+ int i;
+ unsigned int crc = 0;
+ while (len--) {
+ crc ^= *p++;
+ for (i = 0; i < 8; i++)
+ crc = (crc >> 1) ^ ((crc & 1) ? 0xedb88320 : 0);
+ }
+ return crc;
+}
+
+int main(int argc, char **argv) {
+ unsigned int result;
+ if (argc != 2) {
+ printf("no string passed as argument\n");
+ return -1;
+ }
+ result = crc32(argv[1], strlen(argv[1]));
+ printf("0x%x\n", result);
+ return 0;
+}
diff --git a/Documentation/pcmcia/devicetable.txt b/Documentation/pcmcia/devicetable.txt
index 3351c035..199afd1 100644
--- a/Documentation/pcmcia/devicetable.txt
+++ b/Documentation/pcmcia/devicetable.txt
@@ -27,37 +27,7 @@ pcmcia:m0149cC1ABf06pfn00fn00pa725B842DpbF1EFEE84pc0877B627pd00000000
The hex value after "pa" is the hash of product ID string 1, after "pb" for
string 2 and so on.
-Alternatively, you can use this small tool to determine the crc32 hash.
-simply pass the string you want to evaluate as argument to this program,
-e.g.
+Alternatively, you can use crc32hash (see Documentation/pcmcia/crc32hash.c)
+to determine the crc32 hash. Simply pass the string you want to evaluate
+as argument to this program, e.g.:
$ ./crc32hash "Dual Speed"
-
--------------------------------------------------------------------------
-/* crc32hash.c - derived from linux/lib/crc32.c, GNU GPL v2 */
-#include <string.h>
-#include <stdio.h>
-#include <ctype.h>
-#include <stdlib.h>
-
-unsigned int crc32(unsigned char const *p, unsigned int len)
-{
- int i;
- unsigned int crc = 0;
- while (len--) {
- crc ^= *p++;
- for (i = 0; i < 8; i++)
- crc = (crc >> 1) ^ ((crc & 1) ? 0xedb88320 : 0);
- }
- return crc;
-}
-
-int main(int argc, char **argv) {
- unsigned int result;
- if (argc != 2) {
- printf("no string passed as argument\n");
- return -1;
- }
- result = crc32(argv[1], strlen(argv[1]));
- printf("0x%x\n", result);
- return 0;
-}
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