1 files changed, 26 insertions, 0 deletions
diff --git a/package/system/mtd/src/crc32.h b/package/system/mtd/src/crc32.h
new file mode 100644
index 0000000000..68f8ee4feb
--- /dev/null
+++ b/package/system/mtd/src/crc32.h
@@ -0,0 +1,26 @@
+#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;
+}
+
+static inline unsigned int crc32buf(char *buf, size_t len)
+{
+	return crc32(0xFFFFFFFF, buf, len);
+}
+
+
+
+#endif