Mdthbs

I wrote a C program is about vigenere encrypt and decode.
And then, I want to add CPU and Memory usage in this program.

However, I don't know what to add CPU and Memory code in this program.
※I just want to know CPU and Memory usage in this program.
I hope everyone can help me. Thanks!!

The following code is my C program of vigenere encrypt and decode

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <sys/time.h>

#include <omp.h>



int char_to_index(char c)

{

    /*if(c>='A' && c<='Z'){

        c=c+32;

    }*/

    char x = c;

    char result = x - 'a';

    return (int)result;

}



char index_to_char(int c)

{

    int result = c + 97;

    return (char)result;

}



char * xorencrypt(char * message, char * key) {

    int i;

    size_t messagelen = strlen(message);

    size_t keylen = strlen(key);



    char * encrypted = malloc(messagelen+1);

    //start to parallel

    omp_set_num_threads(8);

    #pragma omp parallel 

    private(i)

#pragma omp for

    for (i = 0; i < messagelen; i++) {

        int buf1 = char_to_index(message[i]);

        int buf2 = char_to_index(key[i % keylen]);

        char r = index_to_char(buf1 ^ buf2);

        encrypted[i] = r;

    }



    encrypted[messagelen] = '';



    return encrypted;

}



char * xordecode(char * cript, char * key) {

    int i;

    size_t criptlen = strlen(cript);

    size_t keylen = strlen(key);



    char * message = malloc(criptlen+1);

    //start to parallel

    omp_set_num_threads(8);

    #pragma omp parallel 

    private(i)

#pragma omp for

    for (i = 0; i < criptlen; i++) {

        int buf1 = char_to_index(cript[i]);

        int buf2 = char_to_index(key[i % keylen]);

        char r = index_to_char(buf1 ^ buf2);

        message[i] = r;

    }



    message[criptlen] = '';



    return message;

}



int    time_substract(struct timeval *result, struct timeval *begin,struct timeval *end)

{

    if(begin->tv_sec > end->tv_sec)    return -1;

    if((begin->tv_sec == end->tv_sec) && (begin->tv_usec > end->tv_usec))    return -2;

    result->tv_sec    = (end->tv_sec - begin->tv_sec);

    result->tv_usec    = (end->tv_usec - begin->tv_usec);



    if(result->tv_usec < 0)

    {

        result->tv_sec--;

        result->tv_usec += 1000000;

    }

    return 0;

}



int main(int argc, const char * argv[]) {

    //count time!!!

    struct timeval start,stop,diff;

    memset(&start,0,sizeof(struct timeval));

    memset(&stop,0,sizeof(struct timeval));

    memset(&diff,0,sizeof(struct timeval));

    gettimeofday(&start,0);

    //count time!!!



    char * message = "By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. By using the article the, we’ve shown that it was one specific day that was long and one specific cup of tea that tasted good. ";

    printf("Input    : %sn",message);

    char * key = "key";



    char * encrypted = xorencrypt(message, key);

    printf("Encrypted: %sn", encrypted);



    char * message1 = xordecode(encrypted, key);

    printf("Decrypted: %sn", message1);



    //count time!!!

    gettimeofday(&stop,0);

    time_substract(&diff,&start,&stop);

    printf("Total time : %d s,%d usn",(int)diff.tv_sec,(int)diff.tv_usec);

    //count time!!!

    return 0;

}