winamp/Src/id3v2/id3_field_binary.cpp

83 lines
1.8 KiB
C++

// 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
#include <windows.h>
#include <stdio.h>
#include <memory.h>
#include "id3_field.h"
void ID3_Field::Set(uchar *newData, luint newSize)
{
Clear();
if (newSize)
{
if (newSize == 4294967295/*-1*/)
{
ID3_THROW(ID3E_NoMemory);
return;
}
if (!(data = (unsigned char *)calloc(newSize, sizeof(unsigned char))))
{
ID3_THROW(ID3E_NoMemory);
}
else
{
memcpy (data, newData, newSize);
size = newSize;
type = ID3FTY_BINARY;
hasChanged = true;
}
}
return;
}
void ID3_Field::Get(uchar *buffer, luint buffLength)
{
if (data && size && buffLength && buffer)
{
luint actualBytes = MIN(buffLength, size);
memcpy(buffer, data, actualBytes);
}
}
luint ID3_Field::ParseBinary (uchar *buffer, luint posn, luint buffSize)
{
luint bytesUsed = 0;
bytesUsed = buffSize - posn;
if (fixedLength != -1)
bytesUsed = MIN (fixedLength, bytesUsed);
Set(&buffer[ posn ], bytesUsed);
hasChanged = false;
return bytesUsed;
}
luint ID3_Field::RenderBinary (uchar *buffer)
{
luint bytesUsed = 0;
bytesUsed = BinSize();
memcpy(buffer, data, bytesUsed);
hasChanged = false;
return bytesUsed;
}