pack.c

#include <string.h>
#include <stdlib.h>
#include <arpa/inet.h>
#include "pack.h"


uint8_t unpack_u8(const uint8_t **buf) {
    uint8_t val = **buf;
    (*buf)++;
    return val;
}

uint16_t unpack_u16(const uint8_t **buf) {
    uint16_t val;
    memcpy(&val,*buf,sizeof(uint16_t));
    (*buf) += sizeof(uint16_t);
    return ntohs(val);
}

uint32_t unpack_u32(const uint8_t **buf) {
    uint32_t val;
    memcpy(&val, *buf, sizeof(uint32_t));
    (*buf) += sizeof(uint32_t);
    return ntohl(val);
}

uint8_t *unpack_bytes(const uint8_t **buf,size_t len,uint8_t *str) {
    memcpy(str, *buf, len);
    str[len]='\0';
    (*buf) += len;
    return str;

}

void pack_u8(uint8_t **buf, uint8_t val) {
    **buf = val;
    (*buf) += sizeof(uint8_t);

}

void pack_u16(uint8_t **buf, uint16_t val) {
    uint16_t htonsval = htons(val);
    memcpy(*buf, &htonsval , sizeof(uint16_t));
    *buf += sizeof(uint16_t);
}

void pack_u32(uint8_t **buf, uint32_t val) {
    uint32_t htonlval = htonl(val);
    memcpy(*buf, &htonlval, sizeof(uint32_t));
    (*buf) += sizeof(uint8_t);
}