1 //////////////////////////////////////////////////////////////////////
3 // Tiny XDR implementation for flightgear
4 // written by Oliver Schroeder
5 // released to the puiblic 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>
26 #if BYTE_ORDER == BIG_ENDIAN
27 # define SWAP32(arg) arg
28 # define SWAP64(arg) arg
32 # define SWAP32(arg) sg_bswap_32(arg)
33 # define SWAP64(arg) sg_bswap_64(arg)
38 #define XDR_BYTES_PER_UNIT 4
40 typedef uint32_t xdr_data_t; /* 4 Bytes */
41 typedef uint64_t xdr_data2_t; /* 8 Bytes */
43 /* XDR 8bit integers */
44 xdr_data_t XDR_encode_int8 ( const int8_t & n_Val );
45 xdr_data_t XDR_encode_uint8 ( const uint8_t & n_Val );
46 int8_t XDR_decode_int8 ( const xdr_data_t & n_Val );
47 uint8_t XDR_decode_uint8 ( const xdr_data_t & n_Val );
49 /* XDR 16bit integers */
50 xdr_data_t XDR_encode_int16 ( const int16_t & n_Val );
51 xdr_data_t XDR_encode_uint16 ( const uint16_t & n_Val );
52 int16_t XDR_decode_int16 ( const xdr_data_t & n_Val );
53 uint16_t XDR_decode_uint16 ( const xdr_data_t & n_Val );
55 /* XDR 32bit integers */
56 xdr_data_t XDR_encode_int32 ( const int32_t & n_Val );
57 xdr_data_t XDR_encode_uint32 ( const uint32_t & n_Val );
58 int32_t XDR_decode_int32 ( const xdr_data_t & n_Val );
59 uint32_t XDR_decode_uint32 ( const xdr_data_t & n_Val );
61 /* XDR 64bit integers */
62 xdr_data2_t XDR_encode_int64 ( const int64_t & n_Val );
63 xdr_data2_t XDR_encode_uint64 ( const uint64_t & n_Val );
64 int64_t XDR_decode_int64 ( const xdr_data2_t & n_Val );
65 uint64_t XDR_decode_uint64 ( const xdr_data2_t & n_Val );
67 //////////////////////////////////////////////////
69 // FIXME: #1 these funtions must be fixed for
70 // none IEEE-encoding architecturs
71 // (eg. vax, big suns etc)
72 // FIXME: #2 some compilers return 'double'
73 // regardless of return-type 'float'
74 // this must be fixed, too
75 // FIXME: #3 some machines may need to use a
76 // different endianess for floats!
78 //////////////////////////////////////////////////
80 xdr_data_t XDR_encode_float ( const float & f_Val );
81 float XDR_decode_float ( const xdr_data_t & f_Val );
84 xdr_data2_t XDR_encode_double ( const double & d_Val );
85 double XDR_decode_double ( const xdr_data2_t & d_Val );