1 files changed, 32 insertions, 0 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 @@
+/* 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;
+}