tmach-swap.3 - plan9port - [fork] Plan 9 from user space
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tmach-swap.3 (2239B)
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1 .TH MACH-SWAP 3
2 .SH NAME
3 beswap2, beswap4, beswap8, beieeeftoa32, beieeeftoa64, beieeeftoa80,
4 beload2, beload4, beload8,
5 leswap2, leswap4, leswap8, leieeeftoa32, leieeeftoa64, leieeeftoa80,
6 leload2, leload4, leload8, ieeeftoa32, ieeeftoa64 \- machine-independent access to byte-ordered data
7 .SH SYNOPSIS
8 .B #include <u.h>
9 .br
10 .B #include <libc.h>
11 .br
12 .B #include <mach.h>
13 .PP
14 .ta \w'\fBu64intxx'u
15 .B
16 u16int beswap2(u16int u)
17 .br
18 u32int beswap4(u32int u)
19 .br
20 u64int beswap8(u64int u)
21 .PP
22 .B
23 int beieeeftoa32(char *a, uint n, void *f)
24 .br
25 int beieeeftoa64(char *a, uint n, void *f)
26 .br
27 int beieeeftoa80(char *a, uint n, void *f)
28 .PP
29 .B
30 u16int beload2(uchar *p)
31 .br
32 u32int beload4(uchar *p)
33 .br
34 u64int beload8(uchar *p)
35 .PP
36 .B
37 u16int leswap2(u16int u)
38 .br
39 u32int leswap4(u32int u)
40 .br
41 u64int leswap8(u64int u)
42 .PP
43 .B
44 int leieeeftoa32(char *a, uint n, void *f)
45 .br
46 int leieeeftoa64(char *a, uint n, void *f)
47 .br
48 int leieeeftoa80(char *a, uint n, void *f)
49 .PP
50 .B
51 u16int leload2(uchar *p)
52 .br
53 u32int leload4(uchar *p)
54 .br
55 u64int leload8(uchar *p)
56 .PP
57 .B
58 int ieeeftoa32(char *a, uint n, u32int u)
59 .br
60 int ieeeftoa64(char *a, uint n, u32int hi, u32int lo)
61 .SH DESCRIPTION
62 These functions provide
63 machine-independent access to data in a particular byte order.
64 .PP
65 .IR Beswap2 ,
66 .IR beswap4 ,
67 and
68 .I beswap8
69 return the 2-byte, 4-byte, and 8-byte
70 big-endian representation of the bytes in
71 .IR val ,
72 respectively.
73 .PP
74 .IR Beload2 ,
75 .IR beload4 ,
76 and
77 .I beload8
78 return the 2-byte, 4-byte, and 8-byte
79 big-endian interpretation of the bytes at
80 .IR p ,
81 respectively.
82 .PP
83 .IR Beieeeftoa32 ,
84 .IR beieeeftoa64 ,
85 and
86 .I beieeeftoa80
87 format the big-endian 4-byte, 8-byte, or 10-byte IEEE floating-point value
88 at
89 .IR f
90 into the
91 .IR n -byte
92 string buffer
93 .IR a .
94 .PP
95 .IR Leswap2 ,
96 .IR leswap4 ,
97 etc. are the little-endian equivalents of the routines just described.
98 .PP
99 .I Ieeeftoa32
100 and
101 .I ieeeftoa64
102 format a local machine byte-order floating-point value into the
103 .IR n -byte
104 string buffer
105 .IR a .
106 .I Ieeeftoa32
107 expects a 32-bit floating-point value stored in the bits of
108 .IR u .
109 .I Ieeeftoa64
110 expects a 64-bit floating-point value whose high 32-bits are in
111 .I hi
112 and low 32-bits are in
113 .IR lo .
114 .SH SOURCE
115 .B \*9/src/libmach
116 .SH "SEE ALSO"
117 .MR mach (3)