#include <stdio.h>
#include <stdint.h>
#include <string.h>

#define SIZE 30

//~ #pragma pack(push, 1)
struct sensor 
{
 uint16_t year;
 uint8_t month;
 uint8_t day;
 int8_t t;
};    
//~ #pragma pack(pop)

void cgangeIJ(struct sensor* info,int i, int j){
struct sensor temp;
    temp=info[i];
    info[i]=info[j];
    info[j]=temp;
}

//упорядочивающую его по неубыванию температуры
void SortByT(struct sensor* info,int n){
    for(int i=0; i<n; ++i)
        for(int j=i; j<n; ++j)
            if(info[i].t>=info[j].t)
                cgangeIJ(info,i,j);
}

unsigned int DateToInt(struct sensor* info){
    return info->year << 16 | info->month << 8 | info->day;
}
//упорядочивающую его по дате
void SortByDate(struct sensor* info,int n){
    for(int i=0; i<n; ++i)
        for(int j=i; j<n; ++j)
            if(DateToInt(info+i)>= DateToInt(info+j))
                cgangeIJ(info,i,j);
}

void AddRecord(struct sensor info[],int number,uint16_t year,uint8_t month,uint8_t day,int8_t t){
    info[number].year = year;
    info[number].month = month;
    info[number].day = day;
    info[number].t = t;
}


int AddInfo(struct sensor info[])
{
int counter=0;
    AddRecord(info,counter++,2021,9,16,9);
    AddRecord(info,counter++,2022,9,2,-9);
    AddRecord(info,counter++,2021,1,7,8);
    AddRecord(info,counter++,2021,9,5,1);
    return counter;    
}    

void print(struct sensor* info,int number){
    printf("===================================\n");
    for(int i=0;i<number;i++)
        printf("%04d-%02d-%02d t=%3d\n",
        info[i].year,
        info[i].month,
        info[i].day,
        info[i].t);
}



void load_bin(struct sensor* info,int number)
{
    //Проверка на открытие файла
    FILE* f = fopen("sensor.bin","rb");    
    //Проверка на считанные данные
    //~ int result = 
    fread(info,number*sizeof(struct sensor),1,f);    
    fclose(f);
}

void save_bin(struct sensor* info,int number)
{
    //Проверка на открытие файла
    FILE* f = fopen("sensor.bin","wb");    
    //Проверка на считанные данные
    //~ int result = 
    fwrite(info,number*sizeof(struct sensor),1,f);    
    fclose(f);
}


struct data
{
    uint32_t number;
    struct sensor info[SIZE];
};

void print_data(struct data* d){
    printf("===================================\n");
    for(int i=0;i<d->number;i++)
        printf("%04d-%02d-%02d t=%3d\n",
        d->info[i].year,
        d->info[i].month,
        d->info[i].day,
        d->info[i].t);
}

union sensor_serdes
{
    struct data _data;
    uint8_t bytes[sizeof(struct data)];
};

void load_bin_des(union sensor_serdes * d)
{
    FILE* f = fopen("sensor.bin","rb");
    fread(d->bytes,sizeof(d->_data.number),1,f);   
    fread(d->bytes+sizeof(d->_data.number),d->_data.number*sizeof(struct sensor),1,f);     
    fclose(f);    
}    

void save_bin_ser(union sensor_serdes* d)
{
    FILE* f = fopen("sensor.bin","wb");
    fwrite(d->bytes,sizeof(d->_data.number),1,f);
    fwrite(d->bytes+sizeof(d->_data.number),d->_data.number*sizeof(struct sensor),1,f);
    fclose(f);
}
    
int main(void)
{
    struct data d;
    union sensor_serdes* ds = (union sensor_serdes*)&d;
    d.number=AddInfo(d.info);
    print(d.info,d.number);
    save_bin_ser(ds);
    printf("\nSort by t\n");
    SortByT(d.info,d.number);
    print(d.info,d.number);
    printf("\nSort by date\n");
    SortByDate(d.info,d.number);
    print(d.info,d.number);
    load_bin_des(ds);
    print(d.info,d.number);   
    return 0;
}