linux 2.6.16.38 w/ vs2.0.3-rc1

[linux-2.6.git] / Documentation / pcmcia / devicetable.txt

diff --git a/Documentation/pcmcia/devicetable.txt b/Documentation/pcmcia/devicetable.txt
index 199afd1..3351c03 100644 (file)
--- a/Documentation/pcmcia/devicetable.txt
+++ b/Documentation/pcmcia/devicetable.txt
@@ -27,7 +27,37 @@ 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 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.:
+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.
 $ ./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;
+}