/usr/include/ZenLib/BitStream_LE.h is in libzen-dev 0.4.37-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 | /* Copyright (c) MediaArea.net SARL. All Rights Reserved.
*
* Use of this source code is governed by a zlib-style license that can
* be found in the License.txt file in the root of the source tree.
*/
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//
// Read a stream bit per bit, Little Endian version (rarely used!!!)
// Can read up to 32 bits at once
//
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//---------------------------------------------------------------------------
#ifndef ZenBitStream_LEH
#define ZenBitStream_LEH
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
#include "ZenLib/BitStream.h"
//---------------------------------------------------------------------------
namespace ZenLib
{
class BitStream_LE : public BitStream
{
public:
BitStream_LE () :BitStream() {};
BitStream_LE (const int8u* Buffer_, size_t Size_) :BitStream(Buffer_, Size_) {};
void Attach(const int8u* Buffer_, size_t Size_)
{
endbyte=0;
endbit=0;
buffer=Buffer_;
ptr=Buffer_;
storage=(long)Size_;
};
int32u Get (size_t HowMany)
{
ptr_BeforeLastCall=ptr;
long ret;
static const int32u Mask[33]={
0x00000000,
0x00000001, 0x00000003, 0x00000007, 0x0000000f,
0x0000001f, 0x0000003f, 0x0000007f, 0x000000ff,
0x000001ff, 0x000003ff, 0x000007ff, 0x00000fff,
0x00001fff, 0x00003fff, 0x00007fff, 0x0000ffff,
0x0001ffff, 0x0003ffff, 0x0007ffff, 0x000fffff,
0x001fffff, 0x003fffff, 0x007fffff, 0x00ffffff,
0x01ffffff, 0x03ffffff, 0x07ffffff, 0x0fffffff,
0x1fffffff, 0x3fffffff, 0x7fffffff, 0xffffffff,
};
unsigned long m=Mask[HowMany];
HowMany+=endbit;
if(endbyte+4>=storage){
ret=-1L;
if(endbyte*8+(long)HowMany>storage*8){
Attach(NULL, 0);
goto overflow;
}
}
ret=ptr[0]>>endbit;
if(HowMany>8){
ret|=ptr[1]<<(8-endbit);
if(HowMany>16){
ret|=ptr[2]<<(16-endbit);
if(HowMany>24){
ret|=ptr[3]<<(24-endbit);
if(HowMany>32 && endbit){
ret|=ptr[4]<<(32-endbit);
}
}
}
}
ret&=m;
ptr+=HowMany/8;
endbyte+=(long)HowMany/8;
endbit=(long)HowMany&7;
overflow:
return(ret);
};
void Skip(size_t bits)
{
Get(bits);
}
int32u Remain () //How many bits remain?
{
return storage*8-(endbyte*8+endbit);
};
void Byte_Align()
{
};
size_t Offset_Get()
{
return ptr-buffer;
};
size_t BitOffset_Get()
{
return endbit;
};
size_t OffsetBeforeLastCall_Get()
{
return ptr_BeforeLastCall-buffer;
};
private :
long endbyte;
int endbit;
const unsigned char *buffer;
const unsigned char *ptr;
const unsigned char *ptr_BeforeLastCall;
long storage;
};
} //namespace ZenLib
#endif
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