* Copyright 2009-2014, Ingo Weinhold, ingo_weinhold@gmx.de.
* Distributed under the terms of the MIT License.
*/
#include <package/hpkg/DataReader.h>
#include <DataIO.h>
#include <string.h>
#if defined(_KERNEL_MODE) && !defined(_BOOT_MODE)
#include <KernelExport.h>
#include <kernel.h>
#endif
namespace BPackageKit {
namespace BHPKG {
BDataReader::~BDataReader()
{
}
BAbstractBufferedDataReader::~BAbstractBufferedDataReader()
{
}
status_t
BAbstractBufferedDataReader::ReadData(off_t offset, void* buffer, size_t size)
{
BMemoryIO output(buffer, size);
return ReadDataToOutput(offset, size, &output);
}
BBufferDataReader::BBufferDataReader(const void* data, size_t size)
:
fData(data),
fSize(size)
{
}
status_t
BBufferDataReader::ReadData(off_t offset, void* buffer, size_t size)
{
if (size == 0)
return B_OK;
if (offset < 0)
return B_BAD_VALUE;
if (size > fSize || offset > (off_t)fSize - (off_t)size)
return B_ERROR;
#if defined(_KERNEL_MODE) && !defined(_BOOT_MODE)
if (IS_USER_ADDRESS(buffer)) {
if (user_memcpy(buffer, (const uint8*)fData + offset, size) != B_OK)
return B_BAD_ADDRESS;
} else
#endif
memcpy(buffer, (const uint8*)fData + offset, size);
return B_OK;
}
status_t
BBufferDataReader::ReadDataToOutput(off_t offset, size_t size, BDataIO* output)
{
if (size == 0)
return B_OK;
if (offset < 0)
return B_BAD_VALUE;
if (size > fSize || offset > (off_t)fSize - (off_t)size)
return B_ERROR;
return output->WriteExactly((const uint8*)fData + offset, size);
}
}
}
