RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 19:17:44 +00:00
Code Issues Activity Actions

Kernel: Move devices into Kernel/Devices/.

Browse source
This commit is contained in:
Andreas Kling 2019-04-03 12:36:40 +02:00
parent 072ea7eece
commit ab43658c55
42 changed files with 53 additions and 54 deletions
Download patch file Download diff file Expand all files Collapse all files

58
Kernel/RandomDevice.cpp
View file

@ -1,58 +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
int RandomDevice::random_value()
{
next = next * 1103515245 + 12345;
return((unsigned)(next/((MY_RAND_MAX + 1) * 2)) % (MY_RAND_MAX + 1));
}
float RandomDevice::random_percentage()
{
return (float)random_value() / (float)MY_RAND_MAX;
}
#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, ssize_t size)
{
const int range = 'z' - 'a';
ssize_t nread = min(size, GoodBufferSize);
for (ssize_t i = 0; i < nread; ++i) {
dword r = random_value() % range;
buffer[i] = (byte)('a' + r);
}
return nread;
}
ssize_t RandomDevice::write(Process&, const byte*, ssize_t size)
{
// FIXME: Use input for entropy? I guess that could be a neat feature?
return min(GoodBufferSize, size);
}