mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 15:42:44 +00:00
1b2ef8582c
Asking a File if we could possibly read or write it will never mutate the asking FileDescription&, so it should be const.
29 lines
522 B
C++
29 lines
522 B
C++
#include "ZeroDevice.h"
|
|
#include <AK/StdLibExtras.h>
|
|
#include <AK/kstdio.h>
|
|
|
|
ZeroDevice::ZeroDevice()
|
|
: CharacterDevice(1, 5)
|
|
{
|
|
}
|
|
|
|
ZeroDevice::~ZeroDevice()
|
|
{
|
|
}
|
|
|
|
bool ZeroDevice::can_read(const FileDescription&) const
|
|
{
|
|
return true;
|
|
}
|
|
|
|
ssize_t ZeroDevice::read(FileDescription&, u8* buffer, ssize_t size)
|
|
{
|
|
ssize_t count = min(PAGE_SIZE, size);
|
|
memset(buffer, 0, (size_t)count);
|
|
return count;
|
|
}
|
|
|
|
ssize_t ZeroDevice::write(FileDescription&, const u8*, ssize_t size)
|
|
{
|
|
return min(PAGE_SIZE, size);
|
|
}
|