summaryrefslogtreecommitdiffstats
path: root/tools/pcmcia/crc32hash.c
diff options
context:
space:
mode:
authorDavid S. Miller <davem@davemloft.net>2016-10-30 12:42:58 -0400
committerDavid S. Miller <davem@davemloft.net>2016-10-30 12:42:58 -0400
commit27058af401e49d88a905df000dd26f443fcfa8ce (patch)
tree819f32113d3b8374b9fbf72e2202d4c4d4511a60 /tools/pcmcia/crc32hash.c
parent357f4aae859b5d74554b0ccbb18556f1df4166c3 (diff)
parent2a26d99b251b8625d27aed14e97fc10707a3a81f (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Mostly simple overlapping changes. For example, David Ahern's adjacency list revamp in 'net-next' conflicted with an adjacency list traversal bug fix in 'net'. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/pcmcia/crc32hash.c')
-rw-r--r--tools/pcmcia/crc32hash.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/tools/pcmcia/crc32hash.c b/tools/pcmcia/crc32hash.c
new file mode 100644
index 000000000000..44f8beea7260
--- /dev/null
+++ b/tools/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>
+
+static 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((unsigned char const *)argv[1], strlen(argv[1]));
+ printf("0x%x\n", result);
+ return 0;
+}