#include <stdio.h>
#include "utarray.h"

typedef struct {
    int a;
    int b;
} intpair_t;

int main()
{
    UT_array *pairs, *pairs_cpy;
    intpair_t it, *ip;
    UT_icd pairicd = { sizeof(intpair_t),NULL,NULL,NULL};
    size_t zero=0;
    utarray_new(pairs, &pairicd);
    printf("length is %u\n", utarray_len(pairs));
    it.a = 1;
    it.b=2;
    utarray_push_back(pairs, &it);
    printf("push\n");
    printf("length is %u\n", utarray_len(pairs));
    ip = (intpair_t*)utarray_back(pairs);
    printf("back is %d %d\n", ip->a, ip->b);
    utarray_pop_back(pairs);
    printf("pop\n");
    printf("length is %u\n", utarray_len(pairs));
    it.a = 1;
    it.b=2;
    utarray_push_back(pairs, &it);
    printf("push\n");
    it.a = 3;
    it.b=4;
    utarray_push_back(pairs, &it);
    printf("push\n");
    printf("length is %u\n", utarray_len(pairs));
    ip=NULL;
    while( (ip=(intpair_t*)utarray_next(pairs,ip)) != NULL ) {
        printf("%d %d\n", ip->a, ip->b);
    }
    utarray_erase(pairs,0,1);
    printf("erase [0]\n");
    printf("length is %u\n", utarray_len(pairs));
    while( (ip=(intpair_t*)utarray_next(pairs,ip)) != NULL ) {
        printf("%d %d\n", ip->a, ip->b);
    }
    it.a = 1;
    it.b=2;
    utarray_push_back(pairs, &it);
    printf("push\n");
    while( (ip=(intpair_t*)utarray_next(pairs,ip)) != NULL ) {
        printf("%d %d\n", ip->a, ip->b);
    }
    utarray_clear(pairs);
    printf("clear\n");
    printf("length is %u\n", utarray_len(pairs));
    utarray_extend_back(pairs);
    printf("extend\n");
    ip = (intpair_t*)utarray_back(pairs);
    printf("length is %u\n", utarray_len(pairs));
    printf("ip points to [0] ? %s\n", (ip==(intpair_t*)utarray_front(pairs)) ? "yes" : "no");
    it.a = 1;
    it.b=2;
    utarray_push_back(pairs, &it);
    printf("push\n");
    ip=NULL;
    while( (ip=(intpair_t*)utarray_next(pairs,ip)) != NULL ) {
        printf("%d %d\n", ip->a, ip->b);
    }
    utarray_erase(pairs,1,1);
    printf("erase [1]\n");
    printf("length is %u\n", utarray_len(pairs));
    while( (ip=(intpair_t*)utarray_next(pairs,ip)) != NULL ) {
        printf("%d %d\n", ip->a, ip->b);
    }
    it.a = 3;
    it.b=4;
    utarray_push_back(pairs, &it);
    printf("push\n");
    for(ip=(intpair_t*)utarray_front(pairs); ip!=NULL; ip=(intpair_t*)utarray_next(pairs,ip)) {
        printf("%d %d\n", ip->a,ip->b);
    }
    ip = (intpair_t*)utarray_back(pairs);
    printf("back is %d %d\n", ip->a, ip->b);
    utarray_new(pairs_cpy, &pairicd);
    utarray_concat(pairs_cpy, pairs);
    printf("copy\n");
    printf("cpy length is %u\n", utarray_len(pairs_cpy));
    ip=NULL;
    while( (ip=(intpair_t*)utarray_next(pairs_cpy,ip)) != NULL ) {
        printf("cpy %d %d\n", ip->a, ip->b);
    }
    it.a=5;
    it.b=6;
    utarray_insert(pairs_cpy, &it, 0);
    printf("insert cpy[0]\n");
    printf("cpy length is %u\n", utarray_len(pairs_cpy));
    while( (ip=(intpair_t*)utarray_next(pairs_cpy,ip)) != NULL ) {
        printf("cpy %d %d\n", ip->a, ip->b);
    }
    utarray_erase(pairs_cpy,0,2);
    printf("erase cpy [0] [1]\n");
    printf("cpy length is %u\n", utarray_len(pairs_cpy));
    while( (ip=(intpair_t*)utarray_next(pairs_cpy,ip)) != NULL ) {
        printf("cpy %d %d\n", ip->a, ip->b);
    }
    utarray_inserta(pairs_cpy, pairs, 1);
    printf("inserta at cpy[1]\n");
    printf("cpy length is %u\n", utarray_len(pairs_cpy));
    while( (ip=(intpair_t*)utarray_next(pairs_cpy,ip)) != NULL ) {
        printf("cpy %d %d\n", ip->a, ip->b);
    }
    utarray_free(pairs_cpy);
    printf("free cpy\n");
    printf("length is %u\n", utarray_len(pairs));
    utarray_resize(pairs, 30);
    printf("resize to 30\n");
    printf("length is %u\n", utarray_len(pairs));
    while( (ip=(intpair_t*)utarray_next(pairs,ip)) != NULL ) {
        printf("%d %d\n", ip->a, ip->b);
    }
    utarray_resize(pairs, 1);
    printf("resize to 1\n");
    printf("length is %u\n", utarray_len(pairs));
    utarray_resize(pairs, zero);
    printf("resize to 0\n");
    printf("length is %u\n", utarray_len(pairs));
    utarray_free(pairs);
    printf("free\n");
    return 0;
}