sep_copy_hff - copy header format file from one SEP3d file to another
#include <sep3d.h>
int sep_copy_hff(char *tag_in, char *tag_out)
tag of input History File
tag of output History File
+1 if tag_history is an Sep77 History File
0 if successful
-1 if fails for other reasons
copies hff
sep3d