utils.h

#ifndef UTILS_H
#define UTILS_H

#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <netinet/in.h>
#include <math.h>
#include <unistd.h>
#include <netinet/tcp.h>
#include <vector>
#include <poll.h>
#include <unordered_map>
#include <string>
#include <unordered_set>
#include <arpa/inet.h>
#include <regex>

#define short_real_tcp_t uint16_t
#define MAXBUF 1552

#define DIE(assertion, reason)      \
    if (assertion) {    \
        fprintf(stderr, "ERROR: " reason);  \
        exit(EXIT_FAILURE);     \
    }

    

struct udp_message_t {
    char topic[50];
    uint8_t data_type;
    char content[1501];
}   __attribute__((packed));

struct tcp_message_t {
    char type[11];
    uint8_t data_type;
    uint16_t port;
    char ip_addr[16];
    char payload[1501];
    char topic[51];
}   __attribute__((packed));


struct tcp_client_request {
    bool subscribe;
    char topic[51];
} __attribute__((packed));

struct int_tcp_t {
    int8_t sign_byte;
    uint32_t integer;
} __attribute__((packed));

struct float_tcp_t {
    int8_t sign_byte;
    uint32_t value;
    uint8_t negative_exp;
} __attribute__((packed));

int decode_for_tcp_clients(udp_message_t *udp_msg, tcp_message_t *tcp_msg);

void create_buffer_confirmation(char *buffer, bool connected);

bool is_wildcard(std::string topic);

std::string build_regex(std::string& wildcard);


#endif // UTILS_H