#include "fs/devices/Random.h"
#include "config.h"
#include "rand/Mersenne.h"
#include "render/TextRenderer.h"
#include "std/stdio.h"
#include "std/stdlib.h"
#include "std/string.h"

VFS::Node* RandomDevice::create_new(const char* devname)
{
    VFS::Node* dev = new VFS::Node;
    dev->read_func = RandomDevice::read;
    dev->inode = 0;
    dev->length = 0;
    dev->type = VFS_DEVICE;
    dev->flags = 0;
    strncpy(dev->name, devname, sizeof(dev->name));
    return dev;
}

ssize_t RandomDevice::read(VFS::Node* node, size_t, size_t size, char* buffer)
{
    if (!node) return -1;
    size_t nread = size;
    while (size >= sizeof(uint64_t))
    {
        *(uint64_t*)buffer = Mersenne::get();
        size -= sizeof(uint64_t);
        buffer += sizeof(uint64_t);
    }
    while (size)
    {
        *buffer = (char)(Mersenne::get() & 0xFF);
        size--;
        buffer++;
    }
    return (ssize_t)nread;
}