#include "pcre.h"
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <errno.h>

unsigned int filesize(const char *filename) {
    struct stat sb;

    if (stat(filename, &sb)) {
        printf("Stat error: %s\n", strerror(errno));
        return 0;
    }

    return sb.st_size;
}

int main() {
    char *regexp = "(?s)(?:\\pL+\\n){5000}";

    const char *error;
    int erroffset;

    pcre16 *re = pcre16_compile(
        (PCRE_SPTR16) regexp,
        PCRE_UTF16 | PCRE_UCP,
        &error,
        &erroffset,
        NULL
    );

    printf("PCRE version: %s\n", pcre16_version());

    if (!re) {
        printf("Compile error: %s\n", error);
        return 1;
    }

    char *filename = "utf16.txt";

    size_t size = filesize(filename);
    char *str = malloc(size + 1);
    FILE *fp = fopen(filename, "r");

    fread(str, sizeof(char), size, fp);
    fclose(fp);

    int match;
    int offsets[3];

    for (int i = 0; i<10; i++) {
        match = pcre16_exec(re, NULL, (PCRE_SPTR16) str, size, 0, 0, offsets, 3);
        printf(match == PCRE_ERROR_NOMATCH ? "No!\n" : "Yes!\n");
    }

    free(str);


}