winamp/Src/id3v2/id3_field_integer.cpp

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2024-09-24 13:54:57 +01:00
// The authors have released ID3Lib as Public Domain (PD) and claim no copyright,
// patent or other intellectual property protection in this work. This means that
// it may be modified, redistributed and used in commercial and non-commercial
// software and hardware without restrictions. ID3Lib is distributed on an "AS IS"
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.
//
// The ID3Lib authors encourage improvements and optimisations to be sent to the
// ID3Lib coordinator, currently Dirk Mahoney (dirk@id3.org). Approved
// submissions may be altered, and will be included and released under these terms.
//
// Mon Nov 23 18:34:01 1998
// improved/optimized/whatever 10/30/00 JF
// improved/optimized/whatEVER jan-08-2006 benski
#include "id3_field.h"
#if 0 // taking out operators
ID3_Field& ID3_Field::operator=(luint newData)
{
Set(newData);
return *this;
}
#endif
void ID3_Field::Set(luint newData)
{
Clear();
data = reinterpret_cast<uchar *>(newData);
size = sizeof(luint);
type = ID3FTY_INTEGER;
hasChanged = true;
}
luint ID3_Field::Get(void)
{
return (luint) data;
}
luint ID3_Field::ParseInteger(uchar *buffer, luint posn, luint buffSize)
{
luint bytesUsed = 0;
if(buffer && buffSize)
{
luint i;
luint temp = 0;
bytesUsed = 4;
if(fixedLength != -1)
bytesUsed = MIN(fixedLength, bytesUsed);
for(i = 0; i < bytesUsed; i++)
temp |=(buffer[ posn + i ] <<(((bytesUsed - i) - 1) * 8));
Set(temp);
hasChanged = false;
}
return bytesUsed;
}
luint ID3_Field::RenderInteger(uchar *buffer)
{
luint bytesUsed = 0;
luint length = BinSize();
for(luint i = 0; i < length; i++)
buffer[ i ] = (uchar)((((luint) data) >>(((length - i) - 1) * 8)) & 0xFF);
bytesUsed = length;
hasChanged = false;
return bytesUsed;
}