Utils: new function to copy the content of a file into another file

src/utils.h

@@ -25,6 +25,20 @@
 #define ONE_IF_ZERO(x) (((x)==0)?1:(x))	/**< If x is equal to 0, x takes the value 1.
                                 	   	 */
 
+/**
+ * @brief Copy the content of a file into another file.
+ *
+ * @param src_file_path The path to the source file to copy.
+ * @param dest_file_path The path to the destination file.
+ *
+ * @retval 0 if the operation was successfully completed.
+ * @retval -1 if an error occurred.
+ *
+ * @since July 2017
+ * @author Celine Mercier (celine.mercier@metabarcoding.org)
+ */
+int copy_file(const char* src_file_path, const char* dest_file_path);
+
 
 /**
  * @brief Counts the number of digits of a number.