Initial commit

Signed-off-by: Robert Baldyga <robert.baldyga@intel.com>

modules/cas_cache/utils/utils_data.h

@@ -0,0 +1,31 @@
+/*
+* Copyright(c) 2012-2019 Intel Corporation
+* SPDX-License-Identifier: BSD-3-Clause-Clear
+*/
+
+#ifndef UTILS_DATA_H_
+#define UTILS_DATA_H_
+
+/**
+ * @brief Copy data from a data vector to another one
+ *
+ * This function copies number of bytes from source IO vector to destination
+ * IO vector. It starts coping to specified offset in destination IO vector. If
+ * there is not enough space it will return number of bytes that was
+ * successfully copied.
+ *
+ * @param dst destination IO vector
+ * @param dst_num size of destination IO vector
+ * @param src source IO vector
+ * @param src_num size of source IO vector
+ * @param to dst offset where write to will start
+ * @param from src offset where write from will start
+ * @param bytes number of bytes to be copied
+ *
+ * @return number of bytes written from src to dst
+ */
+uint64_t cas_data_cpy(struct bio_vec *dst, uint64_t dst_num,
+		struct bio_vec *src, uint64_t src_num,
+		uint64_t to, uint64_t from, uint64_t bytes);
+
+#endif /* UTILS_DATA_H_ */