d30360e.c

#include "d30360e.h"

double d30360e(int y1, int m1, int d1, 
               int y2, int m2, int d2, 
               bool matu) 
{
    int diff_days = 0;
    diff_days += (360 * (y2 - y1));
    diff_days += ( 30 * (m2 - m1));
    
    if((m2 == 2) && (d2 >= 28)){
        if( matu ){
            diff_days += d2; 
        }else{
            diff_days += 30;
        }
    }else{
        diff_days += (d2 > 30 ? 30 : d2);
    }
    
    if((m1 == 2) && (d1 >= 28)){
        diff_days -= 30;
    }else{
        diff_days -= (d1 > 30 ? 30 : d1);
    }
    
    if( diff_days < 0){
        fprintf(stderr, "Newer date y2-m2-d2 is older than previous date y1-m1-d1."); 
        exit(-1);
    }else if(diff_days == 0){
        return 0e0;
    }else{
        return (double)(diff_days) / 360e0;
    }
}