#include "useinfo.h"

void get_usage_info(struct rusage **info) {
    (*info) = (struct rusage *)malloc(sizeof(struct rusage));
    getrusage(RUSAGE_SELF, *info);
}

float user_time_info(struct rusage *info1, struct rusage *info2) {
    float utime;

    utime = (info2->ru_utime).tv_sec - (info1->ru_utime).tv_sec +
            ((info2->ru_utime).tv_usec - (info1->ru_utime).tv_usec) *
            0.000001;

    return utime * 1000000; /* we want it in milliseconds */
}

float system_time_info(struct rusage *info1, struct rusage *info2) {
    float stime;

    stime = (info2->ru_stime).tv_sec - (info1->ru_stime).tv_sec +
            ((info2->ru_stime).tv_usec - (info1->ru_stime).tv_usec) *
            0.000001;

    return stime * 1000000; /* we want it in milliseconds */
}

void print_usage_info(struct rusage *info1, struct rusage *info2) {
    float utime, stime;

    utime = (info2->ru_utime).tv_sec - (info1->ru_utime).tv_sec +
            ((info2->ru_utime).tv_usec - (info1->ru_utime).tv_usec) *
            0.000001;

    stime = (info2->ru_stime).tv_sec - (info1->ru_stime).tv_sec +
            ((info2->ru_stime).tv_usec - (info1->ru_stime).tv_usec) *
            0.000001;


    printf("User time: %f\n", utime);
    printf("System time: %f\n", stime);
    printf("Max resident set size: %ld\n", info2->ru_maxrss);
    printf("Integral shared text memory size: %ld\n", info2->ru_ixrss);
    printf("Integral unshared data size: %ld\n", info2->ru_idrss);
    printf("Integral unshared stack size: %ld\n", info2->ru_isrss);
    printf("Page reclaims: %ld\n", info2->ru_minflt);
    printf("Page faults: %ld\n", info2->ru_majflt);
    printf("Swaps: %ld\n", info2->ru_nswap);
    printf("Block input operations: %ld\n", info2->ru_inblock);
    printf("Block output operations: %ld\n", info2->ru_oublock);
    printf("Messages sent: %ld\n", info2->ru_msgsnd);
    printf("Messages received: %ld\n", info2->ru_msgrcv);
    printf("Signals received: %ld\n", info2->ru_nsignals);
    printf("Voluntary context switches: %ld\n", info2->ru_nvcsw);
    printf("Involuntary context switches: %ld\n", info2->ru_nivcsw);
}