1 //////////////////////////////////////////////////////////////////////
3 // Tiny XDR implementation for flightgear
4 // written by Oliver Schroeder
5 // released to the public domain
7 // This implementation is not complete, but implements
10 // For further reading on XDR read RFC 1832.
14 //////////////////////////////////////////////////////////////////////
16 #ifndef TINY_XDR_HEADER
17 #define TINY_XDR_HEADER
19 #if defined HAVE_CONFIG_H
23 #include <simgear/misc/stdint.hxx>
25 #define SWAP32(arg) sgIsLittleEndian() ? sg_bswap_32(arg) : arg
26 #define SWAP64(arg) sgIsLittleEndian() ? sg_bswap_64(arg) : arg
28 #define XDR_BYTES_PER_UNIT 4
30 typedef uint32_t xdr_data_t; /* 4 Bytes */
31 typedef uint64_t xdr_data2_t; /* 8 Bytes */
33 /* XDR 8bit integers */
34 xdr_data_t XDR_encode_int8 ( const int8_t & n_Val );
35 xdr_data_t XDR_encode_uint8 ( const uint8_t & n_Val );
36 int8_t XDR_decode_int8 ( const xdr_data_t & n_Val );
37 uint8_t XDR_decode_uint8 ( const xdr_data_t & n_Val );
39 /* XDR 16bit integers */
40 xdr_data_t XDR_encode_int16 ( const int16_t & n_Val );
41 xdr_data_t XDR_encode_uint16 ( const uint16_t & n_Val );
42 int16_t XDR_decode_int16 ( const xdr_data_t & n_Val );
43 uint16_t XDR_decode_uint16 ( const xdr_data_t & n_Val );
45 /* XDR 32bit integers */
46 xdr_data_t XDR_encode_int32 ( const int32_t & n_Val );
47 xdr_data_t XDR_encode_uint32 ( const uint32_t & n_Val );
48 int32_t XDR_decode_int32 ( const xdr_data_t & n_Val );
49 uint32_t XDR_decode_uint32 ( const xdr_data_t & n_Val );
51 /* XDR 64bit integers */
52 xdr_data2_t XDR_encode_int64 ( const int64_t & n_Val );
53 xdr_data2_t XDR_encode_uint64 ( const uint64_t & n_Val );
54 int64_t XDR_decode_int64 ( const xdr_data2_t & n_Val );
55 uint64_t XDR_decode_uint64 ( const xdr_data2_t & n_Val );
57 //////////////////////////////////////////////////
59 // FIXME: #1 these funtions must be fixed for
60 // none IEEE-encoding architecturs
61 // (eg. vax, big suns etc)
62 // FIXME: #2 some compilers return 'double'
63 // regardless of return-type 'float'
64 // this must be fixed, too
65 // FIXME: #3 some machines may need to use a
66 // different endianess for floats!
68 //////////////////////////////////////////////////
70 xdr_data_t XDR_encode_float ( const float & f_Val );
71 float XDR_decode_float ( const xdr_data_t & f_Val );
74 xdr_data2_t XDR_encode_double ( const double & d_Val );
75 double XDR_decode_double ( const xdr_data2_t & d_Val );