1 files changed, 0 insertions, 164 deletions
diff --git a/cisa/date.go b/cisa/date.go
deleted file mode 100644
index b3b6528..0000000
--- a/cisa/date.go
+++ /dev/null
@@ -1,164 +0,0 @@
-package cisa
-
-import (
-  "encoding/json"
-  "fmt"
-  "regexp"
-  "strconv"
-)
-
-// YYYY-MM-DD
-type Date uint16
-
-// Returns true if the year is a leap year, and false otherwise.
-//
-// Reference:
-// https://www.timeanddate.com/date/leapyear.html
-func isLeapYear(y uint16) bool {
-  // leap year rules:
-  //   1. year is evenly divisible by 4 and is not evenly divisible by 100
-  //   2. year is evenly divisible by 4 and is evenly divisible by 400
-  return (((y % 4) == 0) && ((y % 100) != 0)) || // rule 1
-         (((y % 4) == 0) && ((y % 400) == 0)) // rule 2
-}
-
-// maximum month days
-var maxMonthDays = []uint16 {
-  31, // jan
-  28, // feb (incorrect for leap years!)
-  31, // mar
-  30, // apr
-  31, // may
-  30, // jun
-  31, // jul
-  31, // aug
-  30, // sep
-  31, // oct
-  30, // nov
-  31, // dec
-}
-
-// Get the maximum day for the given year and month.
-func getMaxMonthDay(y, m uint16) uint16 {
-  if m == 2 && isLeapYear(y) {
-    return 29
-  } else {
-    return maxMonthDays[m - 1]
-  }
-}
-
-// Parse date component and check range.
-func parseDateComponent(name string, s []byte, min, max uint16) (uint16, error) {
-  // parse value
-  vr, err := strconv.ParseUint(string(s), 10, 32)
-  if err != nil {
-    return 0, err
-  }
-
-  v := uint16(vr)
-
-  // check range
-  if v < min || v > max {
-    return 0, fmt.Errorf("%s component out of range [%d, %d]: %d", name, v, min, max)
-  }
-
-  return uint16(v), nil
-}
-
-var dateRe = regexp.MustCompile(`^\d{4}-\d{2}-\d{2}$`)
-
-// Create date from byte slice.
-func NewDate(s []byte) (Date, error) {
-  var r Date
-
-  if !dateRe.Match(s) {
-    return r, fmt.Errorf("invalid date: \"%s\"", s)
-  }
-
-  // parse year
-  y, err := parseDateComponent("year", s[0:4], 1999, 2126)
-  if err != nil {
-    return r, err
-  }
-
-  // parse month
-  m, err := parseDateComponent("month", s[5:7], 1, 12)
-  if err != nil {
-    return r, err
-  }
-
-  // parse day
-  d, err := parseDateComponent("month", s[8:10], 1, getMaxMonthDay(y, m))
-  if err != nil {
-    return r, err
-  }
-
-  // encode return date
-  r = Date((((y - 1999) & 0x3f) << 9) |
-           (((m - 1) & 0xf) << 5) |
-           ((d - 1) & 0x1f))
-
-  // return result
-  return r, nil
-}
-
-// Get year, month, and day components.
-func (me Date) GetComponents() (uint16, uint16, uint16) {
-  // extract components
-  y := uint16((uint16(me) >> 9) + 1999)
-  m := uint16(((uint16(me) >> 5) & 0xf) + 1)
-  d := uint16((uint16(me) & 0x1f) + 1)
-
-  return y, m, d
-}
-
-// Get year component.
-func (me Date) Year() uint16 {
-  y, _, _ := me.GetComponents()
-  return y
-}
-
-// Get month component.
-func (me Date) Month() uint16 {
-  _, m, _ := me.GetComponents()
-  return m
-}
-
-// Get day component.
-func (me Date) Day() uint16 {
-  _, _, d := me.GetComponents()
-  return d
-}
-
-// Convert to string.
-func (me Date) String() string {
-  // extract date components
-  y, m, d := me.GetComponents()
-
-  // return string
-  return fmt.Sprintf("%04d-%02d-%02d", y, m, d)
-}
-
-// Unmarshal date from JSON string.
-func (me *Date) UnmarshalJSON(b []byte) error {
-  // decode json string
-  var s string
-  if err := json.Unmarshal(b, &s); err != nil {
-    return err
-  }
-
-  // create date
-  d, err := NewDate([]byte(s))
-  if err != nil {
-    return err
-  }
-
-  // save result, return success
-  *me = d
-  return nil
-}
-
-// Marshal Date as JSON string.
-func (d Date) MarshalJSON() ([]byte, error) {
-  return json.Marshal(d.String())
-}