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authorShuah Khan <shuahkh@osg.samsung.com>2016-09-22 01:54:36 +0300
committerShuah Khan <shuahkh@osg.samsung.com>2016-09-23 22:07:27 +0300
commita67cd5482f37a255b9990ddb942aa7009dcba12f (patch)
treea12daae75e787e134d2b0813fa089ce2365e2ac8 /tools/pcmcia/crc32hash.c
parent3ca9760fdfa411f7e5db54b3437fbb858d2ec825 (diff)
downloadlinux-a67cd5482f37a255b9990ddb942aa7009dcba12f.tar.xz
tools: move pcmcia crc32hash tool from Documentation
Move pcmcia crc32hash tool from Documentation to tools/pcmcia and remove it from Documentation Makefile. Update location information for this tool. Create a new Makefile to build pcmcia. It can be built from top level directory or from pcmcia directory: Run make -C tools/pcmcia or cd tools/pcmcia; make Acked-by: Dominik Brodowski <linux@dominikbrodowski.net> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
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;
+}