ahoy/src/utils/helper.cpp

//-----------------------------------------------------------------------------
// 2022 Ahoy, https://github.com/lumpapu/ahoy
// Creative Commons - http://creativecommons.org/licenses/by-nc-sa/3.0/de/
//-----------------------------------------------------------------------------

#include "helper.h"

namespace ah {
    void ip2Arr(uint8_t ip[], const char *ipStr) {
        char tmp[16];
        memset(ip, 0, 4);
        memset(tmp, 0, 16);
        snprintf(tmp, 16, ipStr);
        char *p = strtok(tmp, ".");
        uint8_t i = 0;
        while(NULL != p) {
            ip[i++] = atoi(p);
            p = strtok(NULL, ".");
        }
    }

    // note: char *str needs to be at least 16 bytes long
    void ip2Char(uint8_t ip[], char *str) {
        if(0 == ip[0])
            str[0] = '\0';
        else
            snprintf(str, 16, "%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
    }

    double round3(double value) {
        return (int)(value * 1000 + 0.5) / 1000.0;
    }

    String getDateTimeStr(time_t t) {
        char str[20];
        if(0 == t)
            sprintf(str, "n/a");
        else
            sprintf(str, "%04d-%02d-%02d %02d:%02d:%02d", year(t), month(t), day(t), hour(t), minute(t), second(t));
        return String(str);
    }

    uint64_t Serial2u64(const char *val) {
        char tmp[3];
        uint64_t ret = 0ULL;
        uint64_t u64;
        memset(tmp, 0, 3);
        for(uint8_t i = 0; i < 6; i++) {
            tmp[0] = val[i*2];
            tmp[1] = val[i*2 + 1];
            if((tmp[0] == '\0') || (tmp[1] == '\0'))
                break;
            u64 = strtol(tmp, NULL, 16);
            ret |= (u64 << ((5-i) << 3));
        }
        return ret;
    }
}