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61 lines
1.2 KiB
61 lines
1.2 KiB
package storage
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import (
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"fmt"
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"strconv"
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"strings"
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)
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// Date - [0000-00-00]
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type Date struct {
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Year int16
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Month byte
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Day byte
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}
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// String output in yyyy-mm-dd format
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func (d Date) String() string {
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return fmt.Sprintf("%04d-%02d-%02d", d.Year, d.Month, d.Day)
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}
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// IsZero true if date is 0000-00-00
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func (d Date) IsZero() bool {
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return d.Day == 0 && d.Month == 0 && d.Year == 0
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}
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// Convert string date in format YYYY-MM-DD to Date.
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// Leading and trailing spaces are ignored. If format is invalid returns zero.
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func parseDate(str string) (d Date, err error) {
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str = strings.TrimSpace(str)
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if str == "0000-00-00" {
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return
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}
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var (
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y, m, n int
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)
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if len(str) != 10 || str[4] != '-' || str[7] != '-' {
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err = fmt.Errorf("Invalid 0000-00-000 style DATE string: " + str)
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return
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}
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if y, err = strconv.Atoi(str[0:4]); err != nil {
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return
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}
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if m, err = strconv.Atoi(str[5:7]); err != nil {
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return
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}
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if m < 1 || m > 12 {
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err = fmt.Errorf("Invalid 0000-00-000 style DATE string: " + str)
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return
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}
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if n, err = strconv.Atoi(str[8:10]); err != nil {
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return
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}
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if n < 1 || n > 31 {
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err = fmt.Errorf("Invalid 0000-00-000 style DATE string: " + str)
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return
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}
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d.Year = int16(y)
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d.Month = byte(m)
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d.Day = byte(n)
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return
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}
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