// compile: gcc -o test test.c upstream_blake3/c/blake3.c upstream_blake3/c/blake3_dispatch.c upstream_blake3/c/blake3_portable.c -DBLAKE3_NO_SSE2 -DBLAKE3_NO_AVX2 -DBLAKE3_NO_AVX512 -DBLAKE3_NO_NEON -DBLAKE3_NO_SSE41
// gcc -o test test.c upstream_blake3/c/blake3.c upstream_blake3/c/blake3_dispatch.c upstream_blake3/c/blake3_portable.c upstream_blake3/c/blake3_sse2_x86-64_unix.S upstream_blake3/c/blake3_sse41_x86-64_unix.S upstream_blake3/c/blake3_avx2_x86-64_unix.S upstream_blake3/c/blake3_avx512_x86-64_unix.S
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include "upstream_blake3/c/blake3.h"
#include <sys/time.h>
#include <stdlib.h>
#include <math.h>
#include <time.h>

int64_t nanoseconds()
{
    struct timespec ts;
    clock_gettime(CLOCK_REALTIME, &ts);
    return (int64_t)ts.tv_sec * 1000000000 + (int64_t)ts.tv_nsec;
}

int main(int argc, char *argv[])
{
    if (argc != 2)
    {
        printf("Usage: %s <iterations>\n", argv[0]);
        return 1;
    }
    int iterations = atoi(argv[1]);
    char teststr[16 * 1024] = "Hello World!"; // 16kb is an important size: it's the size of the TLS record buffer.
    int64_t best = INT64_MAX;
    for (int i = 0; i < iterations; i++)
    {
        int64_t start = nanoseconds();
        blake3_hasher hasher;
        blake3_hasher_init(&hasher);
        blake3_hasher_update(&hasher, teststr, sizeof(teststr));
        uint8_t output[BLAKE3_OUT_LEN];
        blake3_hasher_finalize(&hasher, output, BLAKE3_OUT_LEN);
        int64_t end = nanoseconds();
        int64_t elapsed = end - start;
        if (elapsed < best)
        {
            best = elapsed;
        }
    }
    //printf("Best time: %ld nanoseconds\n", best);
    printf("%ld\n", best);
    printf("\n");
    return 0;
}