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authorMike Buland <eichlan@xagasoft.com>2012-11-09 17:20:11 +0000
committerMike Buland <eichlan@xagasoft.com>2012-11-09 17:20:11 +0000
commitd534a56d95bca7bdd812be024d9eacba4734e2b7 (patch)
treef9b98ee2b80e645a7b54e7934882be6c9f73c165 /c++-qt/src/float.cpp
parent61ccc86fdf06f12cb72a8b7e65286f812cf62154 (diff)
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Many changes: tabconv'd the C++ code, added a license, BSD, and docs.
Diffstat (limited to '')
-rw-r--r--c++-qt/src/float.cpp193
1 files changed, 100 insertions, 93 deletions
diff --git a/c++-qt/src/float.cpp b/c++-qt/src/float.cpp
index fedecf3..03ff755 100644
--- a/c++-qt/src/float.cpp
+++ b/c++-qt/src/float.cpp
@@ -1,15 +1,22 @@
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-qt/float.h" 8#include "gats-qt/float.h"
2#include "gats-qt/integer.h" 9#include "gats-qt/integer.h"
3 10
4#include <math.h> 11#include <math.h>
5 12
6Gats::Float::Float() : 13Gats::Float::Float() :
7 fVal( 0.0 ) 14 fVal( 0.0 )
8{ 15{
9} 16}
10 17
11Gats::Float::Float( double f ) : 18Gats::Float::Float( double f ) :
12 fVal( f ) 19 fVal( f )
13{ 20{
14} 21}
15 22
@@ -19,109 +26,109 @@ Gats::Float::~Float()
19 26
20Gats::Object *Gats::Float::clone() const 27Gats::Object *Gats::Float::clone() const
21{ 28{
22 return new Gats::Float( fVal ); 29 return new Gats::Float( fVal );
23} 30}
24 31
25void Gats::Float::write( QIODevice &rOut ) const 32void Gats::Float::write( QIODevice &rOut ) const
26{ 33{
27 if( fVal == 0.0 ) 34 if( fVal == 0.0 )
28 { 35 {
29 if( signbit( fVal ) ) 36 if( signbit( fVal ) )
30 rOut.write("FZ", 2 ); 37 rOut.write("FZ", 2 );
31 else 38 else
32 rOut.write("Fz", 2 ); 39 rOut.write("Fz", 2 );
33 } 40 }
34 else if( !isfinite( fVal ) ) 41 else if( !isfinite( fVal ) )
35 { 42 {
36 if( isnan( fVal ) ) 43 if( isnan( fVal ) )
37 { 44 {
38 if( signbit( fVal ) ) 45 if( signbit( fVal ) )
39 rOut.write("FN", 2 ); 46 rOut.write("FN", 2 );
40 else 47 else
41 rOut.write("Fn", 2 ); 48 rOut.write("Fn", 2 );
42 } 49 }
43 else 50 else
44 { 51 {
45 if( signbit( fVal ) ) 52 if( signbit( fVal ) )
46 rOut.write("FI", 2 ); 53 rOut.write("FI", 2 );
47 else 54 else
48 rOut.write("Fi", 2 ); 55 rOut.write("Fi", 2 );
49 } 56 }
50 } 57 }
51 else 58 else
52 { 59 {
53 rOut.write("f", 1 ); 60 rOut.write("f", 1 );
54 double d = fVal; 61 double d = fVal;
55 bool bNeg = false; 62 bool bNeg = false;
56 int64_t iScale=0; 63 int64_t iScale=0;
57 if( signbit( d ) ) 64 if( signbit( d ) )
58 { 65 {
59 bNeg = true; 66 bNeg = true;
60 d = -d; 67 d = -d;
61 } 68 }
62 69
63 iScale = log( d ) / 0x1.62e42fefa39efp+2; // log( 256.0 ) 70 iScale = log( d ) / 0x1.62e42fefa39efp+2; // log( 256.0 )
64 if( iScale < 0 ) iScale--; 71 if( iScale < 0 ) iScale--;
65 d /= pow( 256.0, iScale ); 72 d /= pow( 256.0, iScale );
66 73
67 QByteArray s; 74 QByteArray s;
68 s += (uint8_t)(d); 75 s += (uint8_t)(d);
69 d -= (int)d; 76 d -= (int)d;
70 for( int j = 0; j < 150 && d; j++ ) 77 for( int j = 0; j < 150 && d; j++ )
71 { 78 {
72 d = d*256.0; 79 d = d*256.0;
73 s += (uint8_t)d; 80 s += (uint8_t)d;
74 d -= (int)d; 81 d -= (int)d;
75 } 82 }
76 Gats::Integer::writePackedInt( rOut, bNeg?-s.size():s.size() ); 83 Gats::Integer::writePackedInt( rOut, bNeg?-s.size():s.size() );
77 rOut.write( s.constData(), s.size() ); 84 rOut.write( s.constData(), s.size() );
78 Gats::Integer::writePackedInt( rOut, iScale ); 85 Gats::Integer::writePackedInt( rOut, iScale );
79 } 86 }
80} 87}
81 88
82void Gats::Float::read( QIODevice &rIn, char cType ) 89void Gats::Float::read( QIODevice &rIn, char cType )
83{ 90{
84 if( cType == 'F' ) 91 if( cType == 'F' )
85 { 92 {
86 char buf; 93 char buf;
87 rIn.read( &buf, 1 ); 94 rIn.read( &buf, 1 );
88 switch( buf ) 95 switch( buf )
89 { 96 {
90 case 'N': fVal = -NAN; break; 97 case 'N': fVal = -NAN; break;
91 case 'n': fVal = NAN; break; 98 case 'n': fVal = NAN; break;
92 case 'I': fVal = -INFINITY; break; 99 case 'I': fVal = -INFINITY; break;
93 case 'i': fVal = INFINITY; break; 100 case 'i': fVal = INFINITY; break;
94 case 'Z': fVal = -0.0; break; 101 case 'Z': fVal = -0.0; break;
95 case 'z': fVal = 0.0; break; 102 case 'z': fVal = 0.0; break;
96 } 103 }
97 } 104 }
98 else if( cType == 'f' ) 105 else if( cType == 'f' )
99 { 106 {
100 int64_t iStr; 107 int64_t iStr;
101 Gats::Integer::readPackedInt( rIn, iStr ); 108 Gats::Integer::readPackedInt( rIn, iStr );
102 bool bNeg = false; 109 bool bNeg = false;
103 if( iStr < 0 ) 110 if( iStr < 0 )
104 { 111 {
105 bNeg = true; 112 bNeg = true;
106 iStr = -iStr; 113 iStr = -iStr;
107 } 114 }
108 QByteArray s( iStr, '\0' ); 115 QByteArray s( iStr, '\0' );
109 rIn.read( s.data(), iStr ); 116 rIn.read( s.data(), iStr );
110 fVal = 0.0; 117 fVal = 0.0;
111 for( int j = iStr-1; j > 0; j-- ) 118 for( int j = iStr-1; j > 0; j-- )
112 { 119 {
113 fVal = (fVal+(uint8_t)s[j])*0x1p-8; 120 fVal = (fVal+(uint8_t)s[j])*0x1p-8;
114 } 121 }
115 fVal += (uint8_t)s[0]; 122 fVal += (uint8_t)s[0];
116 int64_t iScale; 123 int64_t iScale;
117 Gats::Integer::readPackedInt( rIn, iScale ); 124 Gats::Integer::readPackedInt( rIn, iScale );
118 fVal *= pow( 256.0, iScale ); 125 fVal *= pow( 256.0, iScale );
119 if( bNeg ) fVal = -fVal; 126 if( bNeg ) fVal = -fVal;
120 } 127 }
121} 128}
122/* 129/*
123Bu::Formatter &operator<<( Bu::Formatter &f, const Gats::Float &flt ) 130Bu::Formatter &operator<<( Bu::Formatter &f, const Gats::Float &flt )
124{ 131{
125 return f << "(float) " << flt.getValue(); 132 return f << "(float) " << flt.getValue();
126}*/ 133}*/
127 134
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