code. compile. run. debug. share.
#include <iostream>
#include "util.h"
#include "headerImpl.h"
int main()
{
unsigned char uid[] = {0x00, 0x12, 0x00, 0x00, 0x34, 0x00, 0x59, 0xAF};
long long uidNbr = fromBigEndin<long long>(uid);
std::cout<<uidNbr;
return 0;
}
#pragma once
#include <cstdint>
template <class T>
T fromBigEndin(uint8_t *buf);
#pragma once
#include "util.h"
#include <cstring>
void handleOpenSession(uint8_t *data) {
uint8_t *uid = (uint8_t *)malloc(8);
memcpy(uid, data + 1, 8);
int64_t uidNbr = fromBigEndin<int64_t>(uid);
}
#include "util.h"
template<class T>
T fromBigEndin(uint8_t *buf) {
T number = 0;
uint8_t nBytes = sizeof(T);
uint8_t i;
for (i = 0; i < nBytes; i += 1) {
number += buf[i] << (16 * (nBytes - i - 1));
}
return number;
}
//no angle brackets used here
template int64_t fromBigEndin<int64_t>(uint8_t *buf);
template long long fromBigEndin<long long>(unsigned char *buf);
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