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-rw-r--r--c++-libbu++/src/float.cpp193
1 files changed, 100 insertions, 93 deletions
diff --git a/c++-libbu++/src/float.cpp b/c++-libbu++/src/float.cpp
index c01d824..f7c2737 100644
--- a/c++-libbu++/src/float.cpp
+++ b/c++-libbu++/src/float.cpp
@@ -1,3 +1,10 @@
1/*
2 * Copyright (C) 2007-2012 Xagasoft, All rights reserved.
3 *
4 * This file is part of the libgats library and is released under the
5 * terms of the license contained in the file LICENSE.
6 */
7
1#include "gats/float.h" 8#include "gats/float.h"
2#include "gats/integer.h" 9#include "gats/integer.h"
3 10
@@ -7,12 +14,12 @@
7#include <bu/sio.h> 14#include <bu/sio.h>
8using namespace Bu; 15using namespace Bu;
9Gats::Float::Float() : 16Gats::Float::Float() :
10 fVal( 0.0 ) 17 fVal( 0.0 )
11{ 18{
12} 19}
13 20
14Gats::Float::Float( double f ) : 21Gats::Float::Float( double f ) :
15 fVal( f ) 22 fVal( f )
16{ 23{
17} 24}
18 25
@@ -22,109 +29,109 @@ Gats::Float::~Float()
22 29
23Gats::Object *Gats::Float::clone() const 30Gats::Object *Gats::Float::clone() const
24{ 31{
25 return new Gats::Float( fVal ); 32 return new Gats::Float( fVal );
26} 33}
27 34
28void Gats::Float::write( Bu::Stream &rOut ) const 35void Gats::Float::write( Bu::Stream &rOut ) const
29{ 36{
30 if( fVal == 0.0 ) 37 if( fVal == 0.0 )
31 { 38 {
32 if( signbit( fVal ) ) 39 if( signbit( fVal ) )
33 rOut.write("FZ", 2 ); 40 rOut.write("FZ", 2 );
34 else 41 else
35 rOut.write("Fz", 2 ); 42 rOut.write("Fz", 2 );
36 } 43 }
37 else if( !isfinite( fVal ) ) 44 else if( !isfinite( fVal ) )
38 { 45 {
39 if( isnan( fVal ) ) 46 if( isnan( fVal ) )
40 { 47 {
41 if( signbit( fVal ) ) 48 if( signbit( fVal ) )
42 rOut.write("FN", 2 ); 49 rOut.write("FN", 2 );
43 else 50 else
44 rOut.write("Fn", 2 ); 51 rOut.write("Fn", 2 );
45 } 52 }
46 else 53 else
47 { 54 {
48 if( signbit( fVal ) ) 55 if( signbit( fVal ) )
49 rOut.write("FI", 2 ); 56 rOut.write("FI", 2 );
50 else 57 else
51 rOut.write("Fi", 2 ); 58 rOut.write("Fi", 2 );
52 } 59 }
53 } 60 }
54 else 61 else
55 { 62 {
56 rOut.write("f", 1 ); 63 rOut.write("f", 1 );
57 double d = fVal; 64 double d = fVal;
58 bool bNeg = false; 65 bool bNeg = false;
59 int64_t iScale=0; 66 int64_t iScale=0;
60 if( signbit( d ) ) 67 if( signbit( d ) )
61 { 68 {
62 bNeg = true; 69 bNeg = true;
63 d = -d; 70 d = -d;
64 } 71 }
65 72
66 iScale = log( d ) / 0x1.62e42fefa39efp+2; // log( 256.0 ) 73 iScale = log( d ) / 0x1.62e42fefa39efp+2; // log( 256.0 )
67 if( iScale < 0 ) iScale--; 74 if( iScale < 0 ) iScale--;
68 d /= pow( 256.0, iScale ); 75 d /= pow( 256.0, iScale );
69 76
70 Bu::String s; 77 Bu::String s;
71 s += (uint8_t)(d); 78 s += (uint8_t)(d);
72 d -= (int)d; 79 d -= (int)d;
73 for( int j = 0; j < 150 && d; j++ ) 80 for( int j = 0; j < 150 && d; j++ )
74 { 81 {
75 d = d*256.0; 82 d = d*256.0;
76 s += (uint8_t)d; 83 s += (uint8_t)d;
77 d -= (int)d; 84 d -= (int)d;
78 } 85 }
79 Gats::Integer::writePackedInt( rOut, bNeg?-s.getSize():s.getSize() ); 86 Gats::Integer::writePackedInt( rOut, bNeg?-s.getSize():s.getSize() );
80 rOut.write( s.getStr(), s.getSize() ); 87 rOut.write( s.getStr(), s.getSize() );
81 Gats::Integer::writePackedInt( rOut, iScale ); 88 Gats::Integer::writePackedInt( rOut, iScale );
82 } 89 }
83} 90}
84 91
85void Gats::Float::read( Bu::Stream &rIn, char cType ) 92void Gats::Float::read( Bu::Stream &rIn, char cType )
86{ 93{
87 if( cType == 'F' ) 94 if( cType == 'F' )
88 { 95 {
89 char buf; 96 char buf;
90 rIn.read( &buf, 1 ); 97 rIn.read( &buf, 1 );
91 switch( buf ) 98 switch( buf )
92 { 99 {
93 case 'N': fVal = -NAN; break; 100 case 'N': fVal = -NAN; break;
94 case 'n': fVal = NAN; break; 101 case 'n': fVal = NAN; break;
95 case 'I': fVal = -INFINITY; break; 102 case 'I': fVal = -INFINITY; break;
96 case 'i': fVal = INFINITY; break; 103 case 'i': fVal = INFINITY; break;
97 case 'Z': fVal = -0.0; break; 104 case 'Z': fVal = -0.0; break;
98 case 'z': fVal = 0.0; break; 105 case 'z': fVal = 0.0; break;
99 } 106 }
100 } 107 }
101 else if( cType == 'f' ) 108 else if( cType == 'f' )
102 { 109 {
103 int64_t iStr; 110 int64_t iStr;
104 Gats::Integer::readPackedInt( rIn, iStr ); 111 Gats::Integer::readPackedInt( rIn, iStr );
105 bool bNeg = false; 112 bool bNeg = false;
106 if( iStr < 0 ) 113 if( iStr < 0 )
107 { 114 {
108 bNeg = true; 115 bNeg = true;
109 iStr = -iStr; 116 iStr = -iStr;
110 } 117 }
111 Bu::String s( iStr ); 118 Bu::String s( iStr );
112 rIn.read( s.getStr(), iStr ); 119 rIn.read( s.getStr(), iStr );
113 fVal = 0.0; 120 fVal = 0.0;
114 for( int j = iStr-1; j > 0; j-- ) 121 for( int j = iStr-1; j > 0; j-- )
115 { 122 {
116 fVal = (fVal+(uint8_t)s[j])*0x1p-8; 123 fVal = (fVal+(uint8_t)s[j])*0x1p-8;
117 } 124 }
118 fVal += (uint8_t)s[0]; 125 fVal += (uint8_t)s[0];
119 int64_t iScale; 126 int64_t iScale;
120 Gats::Integer::readPackedInt( rIn, iScale ); 127 Gats::Integer::readPackedInt( rIn, iScale );
121 fVal *= pow( 256.0, iScale ); 128 fVal *= pow( 256.0, iScale );
122 if( bNeg ) fVal = -fVal; 129 if( bNeg ) fVal = -fVal;
123 } 130 }
124} 131}
125 132
126Bu::Formatter &operator<<( Bu::Formatter &f, const Gats::Float &flt ) 133Bu::Formatter &operator<<( Bu::Formatter &f, const Gats::Float &flt )
127{ 134{
128 return f << "(float) " << flt.getValue(); 135 return f << "(float) " << flt.getValue();
129} 136}
130 137
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