project3.c

/* 
 * Project 3 ---- Edited by Edward Schembor
 */

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

unsigned long int next =1;

void Get_next_op( char *random_op, int *random_int, int range );
int  rand( void ); 
void srand( unsigned int seed );
void usage( int agrc, char *argv[]);

int Max_range = 100;
int num_op;
unsigned int s;
int percentage;

main( int argc, char *argv[] )
{
    int    rand_key; 
    char   rand_op;
    int    ret; 
    int	   ret_data;
    int    i;

    unsigned int sum_data;
    int num_get, num_delete, num_insert;

    num_op = 1000000;
    s = 1;
    percentage = 50;

    usage( argc, argv);

    printf("Repository project\n");
    printf("\nGenerating %d operations with range %d and random seed %d \n", num_op, Max_range, s);
    printf("-------------------------------------------------------------------------\n");

    srand( s );

    sum_data   = 0;

    num_get    = 0;
    num_delete = 0;
    num_insert = 0;

    Repository_init( percentage );

    for( i = 1; i <= num_op; i++ )
    {
        Get_next_op( &rand_op, &rand_key, Max_range );

	/* printf("%c %8d %d\n", rand_op, rand_key, Max_range ); */

	switch( rand_op )
	{
	    case 'G':
                num_get++;
		ret = Repository_get( rand_key, &ret_data );
		if( ret < 0 ) {
			printf("\nError in Get with return value %d \n", ret );
		}
		if( ret == 1 ) sum_data = sum_data + (ret_data%100);
		break;

	    case 'I':
                num_insert++;
		ret = Repository_insert( rand_key, i );
		if( ret < 0 ) {
			printf("\nError in Insert with return value %d \n", ret );
		}
		break;

	    case 'D':
                num_delete++;
		ret = Repository_delete( rand_key );
		if( ret < 0 ) {
			printf("\nError in Delete with return value %d \n", ret );
		}
		break;

	    default:
		printf("\nError!!!, Illegal operation %c\n", rand_op );
		return 0;
	}

        if( (i % (num_op/10)) == 0 )
	{
		printf("Printing after %d operations\n", i );
		if( Max_range <= 100 )
		{
			if( num_op <= 10000)
			{
				Repository_print( 2 );
			}
			else Repository_print( 1 );
		}
		else Repository_print( 0 );
	}
    }
    printf("Operation summary: get %d, delete %d, insert %d\n", num_get, num_delete, num_insert );
    printf("Sum of all Repository_get data modulo 100 is %d\n", sum_data );
}

void Get_next_op( char *random_op, int *random_int, int range )
{
    int  random_number;
    int  limit;

    random_number = rand() % 4;

    switch( random_number )
    {
	case 0:
	case 1:
		*random_op = 'G';
		break;
	case 2:
		*random_op = 'D';
		break;
	case 3:
		*random_op = 'I';
    }

    limit = (32768 / range ) * range;
    while( ( random_number = rand() ) >= limit ) ;

    *random_int = random_number % range + 1;
    
}

/* Pseudo random generator on 0..32767 */
int  rand(void)
{
    next = next *1103515245 + 12345;
    return (unsigned int)(next/65536)%32768;
}

void srand( unsigned int seed )
{
    next = seed;
}

void usage(int argc, char *argv[])
{
	while( --argc > 0)
	{
		argv++;

		if( !strncmp( *argv, "-r", 2) )
		{
			sscanf(argv[1], "%d", &Max_range );
			argc--; argv++;
		}else if( !strncmp( *argv, "-o", 2) ){
			sscanf(argv[1], "%d", &num_op );
			argc--; argv++;
		}else if( !strncmp( *argv, "-s", 2) ){
			sscanf(argv[1], "%d", &s );
			argc--; argv++;
		}else if( !strncmp( *argv, "-p", 2) ){
			sscanf(argv[1], "%d", &percentage );
			argc--; argv++;
		}
	}
}