C code include files for the BYU-MERS "SIR" image file format These provide prototype calls for the various routines. The file sir3.h include the #define statement that define machine byte order. It should be edited according to the machine. Note: multibyte values are stored in SIR files in big endian order, so byte swapping is required on little endian machines. Last revised: 12 Oct 2022 DGL (c) 1999, 2000, 2002, 2014, 2019, 2022 BYU MERS