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Rework DiskDevice's read() and write() to be non-virtual wrappers.

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This way subclasses only have to implement readBlock() and writeBlock().
read() and write() require that the offset and length are both divisible
by the blockSize().
This commit is contained in:
Andreas Kling
2018-10-16 14:11:58 +02:00
parent cafb5b2ad6
commit 8293a0ff36
5 changed files with 47 additions and 10 deletions
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8
VirtualFileSystem/FileBackedDiskDevice.cpp
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@@ -35,16 +35,16 @@ unsigned FileBackedDiskDevice::blockSize() const
bool FileBackedDiskDevice::readBlock(unsigned index, byte* out) const
{
qword offset = index * m_blockSize;
return read(offset, blockSize(), out);
return readInternal(offset, blockSize(), out);
}
bool FileBackedDiskDevice::writeBlock(unsigned index, const byte* data)
{
qword offset = index * m_blockSize;
return write(offset, blockSize(), data);
return writeInternal(offset, blockSize(), data);
}
bool FileBackedDiskDevice::read(qword offset, unsigned length, byte* out) const
bool FileBackedDiskDevice::readInternal(qword offset, unsigned length, byte* out) const
{
#ifndef IGNORE_FILE_LENGTH
if (offset + length >= m_fileLength)
@@ -59,7 +59,7 @@ bool FileBackedDiskDevice::read(qword offset, unsigned length, byte* out) const
return true;
}
bool FileBackedDiskDevice::write(qword offset, unsigned length, const byte* data)
bool FileBackedDiskDevice::writeInternal(qword offset, unsigned length, const byte* data)
{
#ifndef IGNORE_FILE_LENGTH
if (offset + length >= m_fileLength)