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1 // 1 //
2 // ******************************************* 2 // ********************************************************************
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4 // * 4 // * *
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19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. *
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24 // ******************************************* 24 // ********************************************************************
25 // 25 //
26 // 26 //
>> 27 // $Id: G4RTOutBitStream.cc 66373 2012-12-18 09:41:34Z gcosmo $
27 // 28 //
28 // 29 //
29 // 30 //
30 31
31 #include <string.h> 32 #include <string.h>
32 #include "G4RTJpeg.hh" 33 #include "G4RTJpeg.hh"
33 #include "G4RTOutBitStream.hh" 34 #include "G4RTOutBitStream.hh"
34 35
35 36
36 37
37 G4OutBitStream::G4OutBitStream(int size) 38 G4OutBitStream::G4OutBitStream(int size)
38 { 39 {
39 if(size < 1) 40 if(size < 1)
40 throw( G4MemoryError( size, "G4OutBitS 41 throw( G4MemoryError( size, "G4OutBitStream" ) );
41 42
42 mHeadOfBuf = mBuf = new u_char[size]; 43 mHeadOfBuf = mBuf = new u_char[size];
43 if( mHeadOfBuf == 0 ) 44 if( mHeadOfBuf == 0 )
44 throw( G4MemoryError( size, "G4OutBitS 45 throw( G4MemoryError( size, "G4OutBitStream" ) );
45 46
46 mEndOfBuf = mBuf + size; 47 mEndOfBuf = mBuf + size;
47 48
48 memset( mHeadOfBuf, 0, size ); 49 memset( mHeadOfBuf, 0, size );
49 50
50 mBitPos = 7; 51 mBitPos = 7;
51 mWriteFlag = 1; 52 mWriteFlag = 1;
52 } 53 }
53 54
54 G4OutBitStream::~G4OutBitStream() 55 G4OutBitStream::~G4OutBitStream()
55 { 56 {
56 delete mBuf; 57 delete mBuf;
57 } 58 }
58 59
59 void 60 void
60 G4OutBitStream::IncBuf( void ) 61 G4OutBitStream::IncBuf( void )
61 { 62 {
62 if( ++mBuf >= mEndOfBuf ) 63 if( ++mBuf >= mEndOfBuf )
63 mWriteFlag = 0; 64 mWriteFlag = 0;
64 } 65 }
65 66
66 67
67 68
68 void 69 void
69 G4OutBitStream::SetBits(int v, int numBits) 70 G4OutBitStream::SetBits(int v, int numBits)
70 { 71 {
71 if( numBits == 0 ) 72 if( numBits == 0 )
72 return; 73 return;
73 if( numBits > 16 ) 74 if( numBits > 16 )
74 throw( G4BufferError( "SetBits:Max Bit 75 throw( G4BufferError( "SetBits:Max Bit Over" ) );
75 if( numBits > 8 ){ 76 if( numBits > 8 ){
76 Set8Bits( u_char(v>>8), numBits-8 ); 77 Set8Bits( u_char(v>>8), numBits-8 );
77 numBits = 8; 78 numBits = 8;
78 } 79 }
79 Set8Bits( u_char(v), numBits ); 80 Set8Bits( u_char(v), numBits );
80 } 81 }
81 82
82 void 83 void
83 G4OutBitStream::SetFewBits(u_char v, int numBi 84 G4OutBitStream::SetFewBits(u_char v, int numBits)
84 { 85 {
85 v &= BitFullMaskT[numBits-1]; 86 v &= BitFullMaskT[numBits-1];
86 *mBuf |= v << (mBitPos + 1 - numBits); 87 *mBuf |= v << (mBitPos + 1 - numBits);
87 if( (mBitPos -= numBits) < 0 ){ 88 if( (mBitPos -= numBits) < 0 ){
88 if( *mBuf == 0xff ){ 89 if( *mBuf == 0xff ){
89 IncBuf(); 90 IncBuf();
90 *mBuf = 0; 91 *mBuf = 0;
91 } 92 }
92 IncBuf(); 93 IncBuf();
93 mBitPos = 7; 94 mBitPos = 7;
94 } 95 }
95 } 96 }
96 97
97 void 98 void
98 G4OutBitStream::SetBits2Byte(u_char v, int num 99 G4OutBitStream::SetBits2Byte(u_char v, int numBits)
99 { 100 {
100 v &= BitFullMaskT[numBits-1]; 101 v &= BitFullMaskT[numBits-1];
101 int nextBits = numBits - (mBitPos + 1); 102 int nextBits = numBits - (mBitPos + 1);
102 *mBuf |= ( v >> nextBits ) & BitFullMaskT[mB 103 *mBuf |= ( v >> nextBits ) & BitFullMaskT[mBitPos];
103 if( *mBuf == 0xff ){ 104 if( *mBuf == 0xff ){
104 IncBuf(); 105 IncBuf();
105 *mBuf = 0; 106 *mBuf = 0;
106 } 107 }
107 IncBuf(); 108 IncBuf();
108 109
109 *mBuf = v << (8 - nextBits); 110 *mBuf = v << (8 - nextBits);
110 mBitPos = 7 - nextBits; 111 mBitPos = 7 - nextBits;
111 } 112 }
112 113
113 void 114 void
114 G4OutBitStream::Set8Bits(u_char v, int numBits 115 G4OutBitStream::Set8Bits(u_char v, int numBits)
115 { 116 {
116 if( mBitPos + 1 >= numBits ) 117 if( mBitPos + 1 >= numBits )
117 SetFewBits( (u_char)v, numBits ); 118 SetFewBits( (u_char)v, numBits );
118 else 119 else
119 SetBits2Byte( (u_char)v, numBits ); 120 SetBits2Byte( (u_char)v, numBits );
120 } 121 }
121 122
122 123
123 void 124 void
124 G4OutBitStream::FullBit( void ) 125 G4OutBitStream::FullBit( void )
125 { 126 {
126 if( mBitPos != 7 ) 127 if( mBitPos != 7 )
127 SetFewBits( BitFullMaskT[mBitPos], mBi 128 SetFewBits( BitFullMaskT[mBitPos], mBitPos+1 );
128 } 129 }
129 130
130 void 131 void
131 G4OutBitStream::SetByte(u_char dat) 132 G4OutBitStream::SetByte(u_char dat)
132 { 133 {
133 if( mWriteFlag ){ 134 if( mWriteFlag ){
134 FullBit(); 135 FullBit();
135 *mBuf = dat; 136 *mBuf = dat;
136 IncBuf(); 137 IncBuf();
137 return; 138 return;
138 } 139 }
139 throw( G4BufferError( "SetByte" ) ); 140 throw( G4BufferError( "SetByte" ) );
140 } 141 }
141 142
142 void 143 void
143 G4OutBitStream::SetWord(u_int dat) 144 G4OutBitStream::SetWord(u_int dat)
144 { 145 {
145 if( mWriteFlag ){ 146 if( mWriteFlag ){
146 FullBit(); 147 FullBit();
147 *mBuf = (dat >> 8) & 0xff; 148 *mBuf = (dat >> 8) & 0xff;
148 IncBuf(); 149 IncBuf();
149 *mBuf = dat & 0xff; 150 *mBuf = dat & 0xff;
150 IncBuf(); 151 IncBuf();
151 return; 152 return;
152 } 153 }
153 throw( G4BufferError( "SetWord" ) ); 154 throw( G4BufferError( "SetWord" ) );
154 } 155 }
155 156
156 void 157 void
157 G4OutBitStream::CopyByte(const char* src, int 158 G4OutBitStream::CopyByte(const char* src, int n)
158 { 159 {
159 if( mBuf+n < mEndOfBuf ){ 160 if( mBuf+n < mEndOfBuf ){
160 FullBit(); 161 FullBit();
161 memcpy( mBuf, src, n ); 162 memcpy( mBuf, src, n );
162 mBuf += n; 163 mBuf += n;
163 return; 164 return;
164 } 165 }
165 throw( G4BufferError( "CopyByte" ) ); 166 throw( G4BufferError( "CopyByte" ) );
166 } 167 }
167 168
168 169