wmframepic/src/age_calc.c

   1 #include "age_calc.h"
   2
   3 static int months_table[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
   4
   5 static void calc_day_year_month(time_t today, int day_birth, int month_birth, int year_birth, int *result) {
   6         int day_curr, month_curr, year_curr, total_days, total_months, total_years;
   7         struct tm *struct_today;
   8
   9         struct_today = localtime(&today);
  10
  11         day_curr = struct_today->tm_mday;
  12         month_curr = struct_today->tm_mon + 1;
  13         year_curr = struct_today->tm_year + 1900;
  14
  15         if((year_curr%4==0 && year_curr%100 !=0) || year_curr%400==0)
  16                 months_table[2] = 29;
  17         else
  18                 months_table[2] = 28;
  19
  20         total_years = year_curr - year_birth;
  21         total_months = month_curr - month_birth;
  22         total_days = day_curr - day_birth;
  23
  24         if(total_days < 0) {
  25                 total_days += months_table[month_curr==1 ? 12 : month_curr-1];
  26                 total_months--;
  27         }
  28
  29         if(total_months < 0) {
  30                 total_months += 12;
  31                 total_years--;
  32         }
  33
  34         result[0] = total_days;
  35         result[1] = total_months;
  36         result[2] = total_years;
  37
  38 }
  39
  40 static void construct_phrases(int *result, char **buffer) {
  41         sprintf(buffer[0], "%02d %s", result[2], result[2] > 1 ? "years" : "year");
  42         sprintf(buffer[1], "%02d %s", result[1], result[1] > 1 ? "months" : "month");
  43         sprintf(buffer[2], "%02d %s", result[0], result[0] > 1 ? "days" : "day");
  44
  45 }
  46
  47 static char **alloc_phrases() {
  48         char **phrases;
  49         phrases = malloc(NUMBER_OF_ROWS * sizeof(char *));
  50         int i;
  51
  52         for(i = 0; i < NUMBER_OF_ROWS; i++)
  53                 phrases[i] = malloc(NUMBER_OF_COLUMNS * sizeof(char));
  54
  55         return phrases;
  56
  57 }
  58
  59 void clear_phrases(char **phrases) {
  60         int i;
  61
  62         for(i = 0; i < NUMBER_OF_ROWS; i++)
  63                 free(phrases[i]);
  64
  65         free(phrases);
  66
  67 }
  68
  69 char **get_phrases(int day, int month, int year) {
  70         time_t today;
  71         time(&today);
  72         char **phrases = alloc_phrases();
  73         int result[3];
  74
  75         calc_day_year_month(today, day, month, year, result);
  76         construct_phrases(result, phrases);
  77
  78         return phrases;
  79
  80 }
  81