custom-virtual-memory-model/program.c at main · 098tarik/custom-virtual-memory-model · GitHub

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/*
Do not modify this file.
Make all of your changes to main.c instead.
*/

#include "program.h"

#include <stdio.h>
#include <stdlib.h>

static int compare_bytes(const void *pa, const void *pb)
{
    int a = *(char *)pa;
    int b = *(char *)pb;

    if (a < b)
    {
        return -1;
    }
    else if (a == b)
    {
        return 0;
    }
    else
    {
        return 1;
    }
}

void alpha_program(char *data, int length)
{
    int total = 0;
    int i, j;

    srand48(38290);

    for (i = 0; i < length; i++)
    {
        data[i] = 0;
    }

    for (j = 0; j < 100; j++)
    {
        int start = lrand48() % length;
        int size = 25;
        for (i = 0; i < 100; i++)
        {
            data[(start + lrand48() % size) % length] = lrand48();
        }
    }

    for (i = 0; i < length; i++)
    {
        total += data[i];
    }

    printf("alpha result is %d\n", total);
}

void beta_program(char *data, int length)
{
    int total = 0;
    int i;

    srand48(4856);

    for (i = 0; i < length; i++)
    {
        data[i] = lrand48();
    }

    qsort(data, length, 1, compare_bytes);

    for (i = 0; i < length; i++)
    {
        total += data[i];
    }

    printf("beta result is %d\n", total);
}

void gamma_program(char *cdata, int length)
{
    unsigned i, j;
    unsigned char *data = (unsigned char *)cdata;
    unsigned total = 0;

    for (i = 0; i < length; i++)
    {
        data[i] = i % 256;
    }

    for (j = 0; j < 10; j++)
    {
        for (i = 0; i < length; i++)
        {
            total += data[i];
        }
    }

    printf("gamma result is %d\n", total);
}

void delta_program(char *cdata, int length)
{
    unsigned i, j;
    unsigned char *data = (unsigned char *)cdata;
    unsigned total = 0;

    for (i = 0; i < length; i++)
    {
        data[i] = i % 256;
    }

    for (j = 0; j < 10; j++)
    {
        for (i = 0; i < length; i++)
        {
            total += data[i];
        }
        // error fixed 04/10/2018
        for (i = length - 1; i > 0; i--)
        {
            total += data[i];
        }
    }

    printf("delta result is %d\n", total);
}