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Move VFS sources into Kernel/.

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This commit is contained in:
Andreas Kling 2019-01-23 05:13:17 +01:00
parent 19104570cc
commit 754037874c
49 changed files with 35 additions and 37 deletions
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53
VirtualFileSystem/RandomDevice.cpp
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@ -1,53 +0,0 @@
#include "RandomDevice.h"
#include "Limits.h"
#include <AK/StdLibExtras.h>
RandomDevice::RandomDevice()
: CharacterDevice(1, 8)
{
}
RandomDevice::~RandomDevice()
{
}
// Simple rand() and srand() borrowed from the POSIX standard:
static unsigned long next = 1;
#define MY_RAND_MAX 32767
static int myrand()
{
next = next * 1103515245 + 12345;
return((unsigned)(next/((MY_RAND_MAX + 1) * 2)) % (MY_RAND_MAX + 1));
}
#if 0
static void mysrand(unsigned seed)
{
next = seed;
}
#endif
bool RandomDevice::can_read(Process&) const
{
return true;
}
ssize_t RandomDevice::read(Process&, byte* buffer, size_t bufferSize)
{
const int range = 'z' - 'a';
ssize_t nread = min(bufferSize, GoodBufferSize);
for (ssize_t i = 0; i < nread; ++i) {
dword r = myrand() % range;
buffer[i] = 'a' + r;
}
return nread;
}
ssize_t RandomDevice::write(Process&, const byte*, size_t bufferSize)
{
// FIXME: Use input for entropy? I guess that could be a neat feature?
return min(GoodBufferSize, bufferSize);
}