year_slot

SFL
Version 2.11

`year_slot_clear`

#include "sflslot.h"
int
year_slot_clear (byte *range, int day_from, int day_to)

Synopsis

Clears the slots for the specified day range. If day_to is zero, it is ignored; only the slot for day_from is cleared. Returns 0 if okay, -1 if the specified range is invalid.

Source Code - (sflslot.c)

{
    if (day_to == 0)
        day_to = day_from;              /*  Range is just one day            */

    if (day_from > day_to)
        return (-1);                    /*  Bad range                        */

    while (day_from <= day_to)          /*  Find and clear each bit          */
      {
        ASSERT (day_from >= 0 && day_from < MAX_DAY);
        range [BYTE (day_from)] &= 255 - BIT (day_from);
        day_from++;
      }
    return (0);                         /*  No errors                        */
}

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