aboutsummaryrefslogtreecommitdiffstats
path: root/package/mtd/src/crc32.h
diff options
context:
space:
mode:
Diffstat (limited to 'package/mtd/src/crc32.h')
-rw-r--r--package/mtd/src/crc32.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/package/mtd/src/crc32.h b/package/mtd/src/crc32.h
new file mode 100644
index 0000000000..ee3145bc15
--- /dev/null
+++ b/package/mtd/src/crc32.h
@@ -0,0 +1,19 @@
+#ifndef CRC32_H
+#define CRC32_H
+
+#include <stdint.h>
+
+extern const uint32_t crc32_table[256];
+
+/* Return a 32-bit CRC of the contents of the buffer. */
+
+ static inline uint32_t
+crc32(uint32_t val, const void *ss, int len)
+{
+ const unsigned char *s = ss;
+ while (--len >= 0)
+ val = crc32_table[(val ^ *s++) & 0xff] ^ (val >> 8);
+ return val;
+}
+
+#endif