1 a84cbb2a 2004-04-19 devnull #include <u.h>
  2 a84cbb2a 2004-04-19 devnull #include <libc.h>
  3 a84cbb2a 2004-04-19 devnull #include <bio.h>
  4 a84cbb2a 2004-04-19 devnull #include <mach.h>
  5 a84cbb2a 2004-04-19 devnull 
  6 a84cbb2a 2004-04-19 devnull /*
  7 a84cbb2a 2004-04-19 devnull  * big-endian short
  8 a84cbb2a 2004-04-19 devnull  */
  9 a84cbb2a 2004-04-19 devnull u16int
 10 a84cbb2a 2004-04-19 devnull beswap2(u16int s)
 11 a84cbb2a 2004-04-19 devnull {
 12 a84cbb2a 2004-04-19 devnull 	uchar *p;
 13 a84cbb2a 2004-04-19 devnull 
 14 a84cbb2a 2004-04-19 devnull 	p = (uchar*)&s;
 15 a84cbb2a 2004-04-19 devnull 	return (p[0]<<8) | p[1];
 16 a84cbb2a 2004-04-19 devnull }
 17 a84cbb2a 2004-04-19 devnull 
 18 a84cbb2a 2004-04-19 devnull /*
 19 a84cbb2a 2004-04-19 devnull  * big-endian long
 20 a84cbb2a 2004-04-19 devnull  */
 21 a84cbb2a 2004-04-19 devnull u32int
 22 a84cbb2a 2004-04-19 devnull beswap4(u32int l)
 23 a84cbb2a 2004-04-19 devnull {
 24 a84cbb2a 2004-04-19 devnull 	uchar *p;
 25 a84cbb2a 2004-04-19 devnull 
 26 a84cbb2a 2004-04-19 devnull 	p = (uchar*)&l;
 27 a84cbb2a 2004-04-19 devnull 	return (p[0]<<24) | (p[1]<<16) | (p[2]<<8) | p[3];
 28 a84cbb2a 2004-04-19 devnull }
 29 a84cbb2a 2004-04-19 devnull 
 30 a84cbb2a 2004-04-19 devnull /*
 31 a84cbb2a 2004-04-19 devnull  * big-endian vlong
 32 a84cbb2a 2004-04-19 devnull  */
 33 a84cbb2a 2004-04-19 devnull u64int
 34 a84cbb2a 2004-04-19 devnull beswap8(u64int v)
 35 a84cbb2a 2004-04-19 devnull {
 36 a84cbb2a 2004-04-19 devnull 	uchar *p;
 37 a84cbb2a 2004-04-19 devnull 
 38 a84cbb2a 2004-04-19 devnull 	p = (uchar*)&v;
 39 a84cbb2a 2004-04-19 devnull 	return ((u64int)p[0]<<56) | ((u64int)p[1]<<48) | ((u64int)p[2]<<40)
 40 a84cbb2a 2004-04-19 devnull 				 | ((u64int)p[3]<<32) | ((u64int)p[4]<<24)
 41 a84cbb2a 2004-04-19 devnull 				 | ((u64int)p[5]<<16) | ((u64int)p[6]<<8)
 42 a84cbb2a 2004-04-19 devnull 				 | (u64int)p[7];
 43 a84cbb2a 2004-04-19 devnull }
 44 a84cbb2a 2004-04-19 devnull 
 45 a84cbb2a 2004-04-19 devnull /*
 46 a84cbb2a 2004-04-19 devnull  * little-endian short
 47 a84cbb2a 2004-04-19 devnull  */
 48 a84cbb2a 2004-04-19 devnull u16int
 49 a84cbb2a 2004-04-19 devnull leswap2(u16int s)
 50 a84cbb2a 2004-04-19 devnull {
 51 a84cbb2a 2004-04-19 devnull 	uchar *p;
 52 a84cbb2a 2004-04-19 devnull 
 53 a84cbb2a 2004-04-19 devnull 	p = (uchar*)&s;
 54 a84cbb2a 2004-04-19 devnull 	return (p[1]<<8) | p[0];
 55 a84cbb2a 2004-04-19 devnull }
 56 a84cbb2a 2004-04-19 devnull 
 57 a84cbb2a 2004-04-19 devnull /*
 58 a84cbb2a 2004-04-19 devnull  * little-endian long
 59 a84cbb2a 2004-04-19 devnull  */
 60 a84cbb2a 2004-04-19 devnull u32int
 61 a84cbb2a 2004-04-19 devnull leswap4(u32int l)
 62 a84cbb2a 2004-04-19 devnull {
 63 a84cbb2a 2004-04-19 devnull 	uchar *p;
 64 a84cbb2a 2004-04-19 devnull 
 65 a84cbb2a 2004-04-19 devnull 	p = (uchar*)&l;
 66 a84cbb2a 2004-04-19 devnull 	return (p[3]<<24) | (p[2]<<16) | (p[1]<<8) | p[0];
 67 a84cbb2a 2004-04-19 devnull }
 68 a84cbb2a 2004-04-19 devnull 
 69 a84cbb2a 2004-04-19 devnull /*
 70 a84cbb2a 2004-04-19 devnull  * little-endian vlong
 71 a84cbb2a 2004-04-19 devnull  */
 72 a84cbb2a 2004-04-19 devnull u64int
 73 a84cbb2a 2004-04-19 devnull leswap8(u64int v)
 74 a84cbb2a 2004-04-19 devnull {
 75 a84cbb2a 2004-04-19 devnull 	uchar *p;
 76 a84cbb2a 2004-04-19 devnull 
 77 a84cbb2a 2004-04-19 devnull 	p = (uchar*)&v;
 78 a84cbb2a 2004-04-19 devnull 	return ((u64int)p[7]<<56) | ((u64int)p[6]<<48) | ((u64int)p[5]<<40)
 79 a84cbb2a 2004-04-19 devnull 				 | ((u64int)p[4]<<32) | ((u64int)p[3]<<24)
 80 a84cbb2a 2004-04-19 devnull 				 | ((u64int)p[2]<<16) | ((u64int)p[1]<<8)
 81 a84cbb2a 2004-04-19 devnull 				 | (u64int)p[0];
 82 a84cbb2a 2004-04-19 devnull }
 83 a84cbb2a 2004-04-19 devnull 
 84 a84cbb2a 2004-04-19 devnull u16int
 85 a84cbb2a 2004-04-19 devnull leload2(uchar *b)
 86 a84cbb2a 2004-04-19 devnull {
 87 a84cbb2a 2004-04-19 devnull 	return b[0] | (b[1]<<8);
 88 a84cbb2a 2004-04-19 devnull }
 89 a84cbb2a 2004-04-19 devnull 
 90 a84cbb2a 2004-04-19 devnull u32int
 91 a84cbb2a 2004-04-19 devnull leload4(uchar *b)
 92 a84cbb2a 2004-04-19 devnull {
 93 a84cbb2a 2004-04-19 devnull 	return b[0] | (b[1]<<8) | (b[2]<<16) | (b[3]<<24);
 94 a84cbb2a 2004-04-19 devnull }
 95 a84cbb2a 2004-04-19 devnull 
 96 a84cbb2a 2004-04-19 devnull u64int
 97 a84cbb2a 2004-04-19 devnull leload8(uchar *b)
 98 a84cbb2a 2004-04-19 devnull {
 99 a84cbb2a 2004-04-19 devnull 	return leload4(b) | ((uvlong)leload4(b+4) << 32);
100 a84cbb2a 2004-04-19 devnull }
101 a84cbb2a 2004-04-19 devnull 
102 a84cbb2a 2004-04-19 devnull u16int
103 a84cbb2a 2004-04-19 devnull beload2(uchar *b)
104 a84cbb2a 2004-04-19 devnull {
105 a84cbb2a 2004-04-19 devnull 	return (b[0]<<8) | b[1];
106 a84cbb2a 2004-04-19 devnull }
107 a84cbb2a 2004-04-19 devnull 
108 a84cbb2a 2004-04-19 devnull u32int
109 a84cbb2a 2004-04-19 devnull beload4(uchar *b)
110 a84cbb2a 2004-04-19 devnull {
111 a84cbb2a 2004-04-19 devnull 	return (b[0]<<24) | (b[1]<<16) | (b[2]<<8) | b[3];
112 a84cbb2a 2004-04-19 devnull }
113 a84cbb2a 2004-04-19 devnull 
114 a84cbb2a 2004-04-19 devnull u64int
115 a84cbb2a 2004-04-19 devnull beload8(uchar *b)
116 a84cbb2a 2004-04-19 devnull {
117 a84cbb2a 2004-04-19 devnull 	return ((uvlong)beload4(b) << 32) | beload4(b+4);
118 a84cbb2a 2004-04-19 devnull }