ff5f50c52c
Update to current version of Go library. Update testsuite for removed types. * go-lang.c (go_langhook_init): Omit float_type_size when calling go_create_gogo. * go-c.h: Update declaration of go_create_gogo. From-SVN: r169098
619 lines
15 KiB
Go
619 lines
15 KiB
Go
package time
|
|
|
|
import (
|
|
"bytes"
|
|
"os"
|
|
"strconv"
|
|
)
|
|
|
|
const (
|
|
numeric = iota
|
|
alphabetic
|
|
separator
|
|
plus
|
|
minus
|
|
)
|
|
|
|
// These are predefined layouts for use in Time.Format.
|
|
// The standard time used in the layouts is:
|
|
// Mon Jan 2 15:04:05 MST 2006 (MST is GMT-0700)
|
|
// which is Unix time 1136243045.
|
|
// (Think of it as 01/02 03:04:05PM '06 -0700.)
|
|
// To define your own format, write down what the standard
|
|
// time would look like formatted your way.
|
|
//
|
|
// Within the format string, an underscore _ represents a space that may be
|
|
// replaced by a digit if the following number (a day) has two digits; for
|
|
// compatibility with fixed-width Unix time formats.
|
|
//
|
|
// Numeric time zone offsets format as follows:
|
|
// -0700 ±hhmm
|
|
// -07:00 ±hh:mm
|
|
// Replacing the sign in the format with a Z triggers
|
|
// the ISO 8601 behavior of printing Z instead of an
|
|
// offset for the UTC zone. Thus:
|
|
// Z0700 Z or ±hhmm
|
|
// Z07:00 Z or ±hh:mm
|
|
const (
|
|
ANSIC = "Mon Jan _2 15:04:05 2006"
|
|
UnixDate = "Mon Jan _2 15:04:05 MST 2006"
|
|
RubyDate = "Mon Jan 02 15:04:05 -0700 2006"
|
|
RFC822 = "02 Jan 06 1504 MST"
|
|
// RFC822 with Zulu time.
|
|
RFC822Z = "02 Jan 06 1504 -0700"
|
|
RFC850 = "Monday, 02-Jan-06 15:04:05 MST"
|
|
RFC1123 = "Mon, 02 Jan 2006 15:04:05 MST"
|
|
RFC3339 = "2006-01-02T15:04:05Z07:00"
|
|
Kitchen = "3:04PM"
|
|
)
|
|
|
|
const (
|
|
stdLongMonth = "January"
|
|
stdMonth = "Jan"
|
|
stdNumMonth = "1"
|
|
stdZeroMonth = "01"
|
|
stdLongWeekDay = "Monday"
|
|
stdWeekDay = "Mon"
|
|
stdDay = "2"
|
|
stdUnderDay = "_2"
|
|
stdZeroDay = "02"
|
|
stdHour = "15"
|
|
stdHour12 = "3"
|
|
stdZeroHour12 = "03"
|
|
stdMinute = "4"
|
|
stdZeroMinute = "04"
|
|
stdSecond = "5"
|
|
stdZeroSecond = "05"
|
|
stdLongYear = "2006"
|
|
stdYear = "06"
|
|
stdPM = "PM"
|
|
stdpm = "pm"
|
|
stdTZ = "MST"
|
|
stdISO8601TZ = "Z0700" // prints Z for UTC
|
|
stdISO8601ColonTZ = "Z07:00" // prints Z for UTC
|
|
stdNumTZ = "-0700" // always numeric
|
|
stdNumShortTZ = "-07" // always numeric
|
|
stdNumColonTZ = "-07:00" // always numeric
|
|
)
|
|
|
|
// nextStdChunk finds the first occurrence of a std string in
|
|
// layout and returns the text before, the std string, and the text after.
|
|
func nextStdChunk(layout string) (prefix, std, suffix string) {
|
|
for i := 0; i < len(layout); i++ {
|
|
switch layout[i] {
|
|
case 'J': // January, Jan
|
|
if len(layout) >= i+7 && layout[i:i+7] == stdLongMonth {
|
|
return layout[0:i], stdLongMonth, layout[i+7:]
|
|
}
|
|
if len(layout) >= i+3 && layout[i:i+3] == stdMonth {
|
|
return layout[0:i], stdMonth, layout[i+3:]
|
|
}
|
|
|
|
case 'M': // Monday, Mon, MST
|
|
if len(layout) >= i+6 && layout[i:i+6] == stdLongWeekDay {
|
|
return layout[0:i], stdLongWeekDay, layout[i+6:]
|
|
}
|
|
if len(layout) >= i+3 {
|
|
if layout[i:i+3] == stdWeekDay {
|
|
return layout[0:i], stdWeekDay, layout[i+3:]
|
|
}
|
|
if layout[i:i+3] == stdTZ {
|
|
return layout[0:i], stdTZ, layout[i+3:]
|
|
}
|
|
}
|
|
|
|
case '0': // 01, 02, 03, 04, 05, 06
|
|
if len(layout) >= i+2 && '1' <= layout[i+1] && layout[i+1] <= '6' {
|
|
return layout[0:i], layout[i : i+2], layout[i+2:]
|
|
}
|
|
|
|
case '1': // 15, 1
|
|
if len(layout) >= i+2 && layout[i+1] == '5' {
|
|
return layout[0:i], stdHour, layout[i+2:]
|
|
}
|
|
return layout[0:i], stdNumMonth, layout[i+1:]
|
|
|
|
case '2': // 2006, 2
|
|
if len(layout) >= i+4 && layout[i:i+4] == stdLongYear {
|
|
return layout[0:i], stdLongYear, layout[i+4:]
|
|
}
|
|
return layout[0:i], stdDay, layout[i+1:]
|
|
|
|
case '_': // _2
|
|
if len(layout) >= i+2 && layout[i+1] == '2' {
|
|
return layout[0:i], stdUnderDay, layout[i+2:]
|
|
}
|
|
|
|
case '3', '4', '5': // 3, 4, 5
|
|
return layout[0:i], layout[i : i+1], layout[i+1:]
|
|
|
|
case 'P': // PM
|
|
if len(layout) >= i+2 && layout[i+1] == 'M' {
|
|
return layout[0:i], layout[i : i+2], layout[i+2:]
|
|
}
|
|
|
|
case 'p': // pm
|
|
if len(layout) >= i+2 && layout[i+1] == 'm' {
|
|
return layout[0:i], layout[i : i+2], layout[i+2:]
|
|
}
|
|
|
|
case '-': // -0700, -07:00, -07
|
|
if len(layout) >= i+5 && layout[i:i+5] == stdNumTZ {
|
|
return layout[0:i], layout[i : i+5], layout[i+5:]
|
|
}
|
|
if len(layout) >= i+6 && layout[i:i+6] == stdNumColonTZ {
|
|
return layout[0:i], layout[i : i+6], layout[i+6:]
|
|
}
|
|
if len(layout) >= i+3 && layout[i:i+3] == stdNumShortTZ {
|
|
return layout[0:i], layout[i : i+3], layout[i+3:]
|
|
}
|
|
case 'Z': // Z0700, Z07:00
|
|
if len(layout) >= i+5 && layout[i:i+5] == stdISO8601TZ {
|
|
return layout[0:i], layout[i : i+5], layout[i+5:]
|
|
}
|
|
if len(layout) >= i+6 && layout[i:i+6] == stdISO8601ColonTZ {
|
|
return layout[0:i], layout[i : i+6], layout[i+6:]
|
|
}
|
|
}
|
|
}
|
|
return layout, "", ""
|
|
}
|
|
|
|
var longDayNames = []string{
|
|
"Sunday",
|
|
"Monday",
|
|
"Tuesday",
|
|
"Wednesday",
|
|
"Thursday",
|
|
"Friday",
|
|
"Saturday",
|
|
}
|
|
|
|
var shortDayNames = []string{
|
|
"Sun",
|
|
"Mon",
|
|
"Tue",
|
|
"Wed",
|
|
"Thu",
|
|
"Fri",
|
|
"Sat",
|
|
}
|
|
|
|
var shortMonthNames = []string{
|
|
"---",
|
|
"Jan",
|
|
"Feb",
|
|
"Mar",
|
|
"Apr",
|
|
"May",
|
|
"Jun",
|
|
"Jul",
|
|
"Aug",
|
|
"Sep",
|
|
"Oct",
|
|
"Nov",
|
|
"Dec",
|
|
}
|
|
|
|
var longMonthNames = []string{
|
|
"---",
|
|
"January",
|
|
"February",
|
|
"March",
|
|
"April",
|
|
"May",
|
|
"June",
|
|
"July",
|
|
"August",
|
|
"September",
|
|
"October",
|
|
"November",
|
|
"December",
|
|
}
|
|
|
|
func lookup(tab []string, val string) (int, string, os.Error) {
|
|
for i, v := range tab {
|
|
if len(val) >= len(v) && val[0:len(v)] == v {
|
|
return i, val[len(v):], nil
|
|
}
|
|
}
|
|
return -1, val, errBad
|
|
}
|
|
|
|
func pad(i int, padding string) string {
|
|
s := strconv.Itoa(i)
|
|
if i < 10 {
|
|
s = padding + s
|
|
}
|
|
return s
|
|
}
|
|
|
|
func zeroPad(i int) string { return pad(i, "0") }
|
|
|
|
// Format returns a textual representation of the time value formatted
|
|
// according to layout. The layout defines the format by showing the
|
|
// representation of a standard time, which is then used to describe
|
|
// the time to be formatted. Predefined layouts ANSIC, UnixDate,
|
|
// RFC3339 and others describe standard representations. For more
|
|
// information about the formats, see the documentation for ANSIC.
|
|
func (t *Time) Format(layout string) string {
|
|
b := new(bytes.Buffer)
|
|
// Each iteration generates one std value.
|
|
for {
|
|
prefix, std, suffix := nextStdChunk(layout)
|
|
b.WriteString(prefix)
|
|
if std == "" {
|
|
break
|
|
}
|
|
var p string
|
|
switch std {
|
|
case stdYear:
|
|
p = strconv.Itoa64(t.Year % 100)
|
|
case stdLongYear:
|
|
p = strconv.Itoa64(t.Year)
|
|
case stdMonth:
|
|
p = shortMonthNames[t.Month]
|
|
case stdLongMonth:
|
|
p = longMonthNames[t.Month]
|
|
case stdNumMonth:
|
|
p = strconv.Itoa(t.Month)
|
|
case stdZeroMonth:
|
|
p = zeroPad(t.Month)
|
|
case stdWeekDay:
|
|
p = shortDayNames[t.Weekday]
|
|
case stdLongWeekDay:
|
|
p = longDayNames[t.Weekday]
|
|
case stdDay:
|
|
p = strconv.Itoa(t.Day)
|
|
case stdUnderDay:
|
|
p = pad(t.Day, " ")
|
|
case stdZeroDay:
|
|
p = zeroPad(t.Day)
|
|
case stdHour:
|
|
p = zeroPad(t.Hour)
|
|
case stdHour12:
|
|
p = strconv.Itoa(t.Hour % 12)
|
|
case stdZeroHour12:
|
|
p = zeroPad(t.Hour % 12)
|
|
case stdMinute:
|
|
p = strconv.Itoa(t.Minute)
|
|
case stdZeroMinute:
|
|
p = zeroPad(t.Minute)
|
|
case stdSecond:
|
|
p = strconv.Itoa(t.Second)
|
|
case stdZeroSecond:
|
|
p = zeroPad(t.Second)
|
|
case stdISO8601TZ, stdISO8601ColonTZ, stdNumTZ, stdNumColonTZ:
|
|
// Ugly special case. We cheat and take the "Z" variants
|
|
// to mean "the time zone as formatted for ISO 8601".
|
|
if t.ZoneOffset == 0 && std[0] == 'Z' {
|
|
p = "Z"
|
|
break
|
|
}
|
|
zone := t.ZoneOffset / 60 // convert to minutes
|
|
if zone < 0 {
|
|
p = "-"
|
|
zone = -zone
|
|
} else {
|
|
p = "+"
|
|
}
|
|
p += zeroPad(zone / 60)
|
|
if std == stdISO8601ColonTZ || std == stdNumColonTZ {
|
|
p += ":"
|
|
}
|
|
p += zeroPad(zone % 60)
|
|
case stdPM:
|
|
if t.Hour >= 12 {
|
|
p = "PM"
|
|
} else {
|
|
p = "AM"
|
|
}
|
|
case stdpm:
|
|
if t.Hour >= 12 {
|
|
p = "pm"
|
|
} else {
|
|
p = "am"
|
|
}
|
|
case stdTZ:
|
|
if t.Zone != "" {
|
|
p = t.Zone
|
|
} else {
|
|
// No time zone known for this time, but we must print one.
|
|
// Use the -0700 format.
|
|
zone := t.ZoneOffset / 60 // convert to minutes
|
|
if zone < 0 {
|
|
p = "-"
|
|
zone = -zone
|
|
} else {
|
|
p = "+"
|
|
}
|
|
p += zeroPad(zone / 60)
|
|
p += zeroPad(zone % 60)
|
|
}
|
|
}
|
|
b.WriteString(p)
|
|
layout = suffix
|
|
}
|
|
return b.String()
|
|
}
|
|
|
|
// String returns a Unix-style representation of the time value.
|
|
func (t *Time) String() string {
|
|
if t == nil {
|
|
return "<nil>"
|
|
}
|
|
return t.Format(UnixDate)
|
|
}
|
|
|
|
var errBad = os.ErrorString("bad") // just a marker; not returned to user
|
|
|
|
// ParseError describes a problem parsing a time string.
|
|
type ParseError struct {
|
|
Layout string
|
|
Value string
|
|
LayoutElem string
|
|
ValueElem string
|
|
Message string
|
|
}
|
|
|
|
// String is the string representation of a ParseError.
|
|
func (e *ParseError) String() string {
|
|
if e.Message == "" {
|
|
return "parsing time " +
|
|
strconv.Quote(e.Value) + " as " +
|
|
strconv.Quote(e.Layout) + ": cannot parse " +
|
|
strconv.Quote(e.ValueElem) + " as " +
|
|
strconv.Quote(e.LayoutElem)
|
|
}
|
|
return "parsing time " +
|
|
strconv.Quote(e.Value) + e.Message
|
|
}
|
|
|
|
// getnum parses s[0:1] or s[0:2] (fixed forces the latter)
|
|
// as a decimal integer and returns the integer and the
|
|
// remainder of the string.
|
|
func getnum(s string, fixed bool) (int, string, os.Error) {
|
|
if len(s) == 0 || s[0] < '0' || s[0] > '9' {
|
|
return 0, s, errBad
|
|
}
|
|
if len(s) == 1 || s[1] < '0' || s[1] > '9' {
|
|
if fixed {
|
|
return 0, s, errBad
|
|
}
|
|
return int(s[0] - '0'), s[1:], nil
|
|
}
|
|
return int(s[0]-'0')*10 + int(s[1]-'0'), s[2:], nil
|
|
}
|
|
|
|
func cutspace(s string) string {
|
|
for len(s) > 0 && s[0] == ' ' {
|
|
s = s[1:]
|
|
}
|
|
return s
|
|
}
|
|
|
|
// skip removes the given prefix from value,
|
|
// treating runs of space characters as equivalent.
|
|
func skip(value, prefix string) (string, os.Error) {
|
|
for len(prefix) > 0 {
|
|
if prefix[0] == ' ' {
|
|
if len(value) > 0 && value[0] != ' ' {
|
|
return "", errBad
|
|
}
|
|
prefix = cutspace(prefix)
|
|
value = cutspace(value)
|
|
continue
|
|
}
|
|
if len(value) == 0 || value[0] != prefix[0] {
|
|
return "", errBad
|
|
}
|
|
prefix = prefix[1:]
|
|
value = value[1:]
|
|
}
|
|
return value, nil
|
|
}
|
|
|
|
// Parse parses a formatted string and returns the time value it represents.
|
|
// The layout defines the format by showing the representation of a standard
|
|
// time, which is then used to describe the string to be parsed. Predefined
|
|
// layouts ANSIC, UnixDate, RFC3339 and others describe standard
|
|
// representations.For more information about the formats, see the
|
|
// documentation for ANSIC.
|
|
//
|
|
// Only those elements present in the value will be set in the returned time
|
|
// structure. Also, if the input string represents an inconsistent time
|
|
// (such as having the wrong day of the week), the returned value will also
|
|
// be inconsistent. In any case, the elements of the returned time will be
|
|
// sane: hours in 0..23, minutes in 0..59, day of month in 0..31, etc.
|
|
// Years must be in the range 0000..9999.
|
|
func Parse(alayout, avalue string) (*Time, os.Error) {
|
|
var t Time
|
|
rangeErrString := "" // set if a value is out of range
|
|
pmSet := false // do we need to add 12 to the hour?
|
|
layout, value := alayout, avalue
|
|
// Each iteration processes one std value.
|
|
for {
|
|
var err os.Error
|
|
prefix, std, suffix := nextStdChunk(layout)
|
|
value, err = skip(value, prefix)
|
|
if err != nil {
|
|
return nil, &ParseError{alayout, avalue, prefix, value, ""}
|
|
}
|
|
if len(std) == 0 {
|
|
if len(value) != 0 {
|
|
return nil, &ParseError{alayout, avalue, "", value, ": extra text: " + value}
|
|
}
|
|
break
|
|
}
|
|
layout = suffix
|
|
var p string
|
|
switch std {
|
|
case stdYear:
|
|
if len(value) < 2 {
|
|
err = errBad
|
|
break
|
|
}
|
|
p, value = value[0:2], value[2:]
|
|
t.Year, err = strconv.Atoi64(p)
|
|
if t.Year >= 69 { // Unix time starts Dec 31 1969 in some time zones
|
|
t.Year += 1900
|
|
} else {
|
|
t.Year += 2000
|
|
}
|
|
case stdLongYear:
|
|
if len(value) < 4 || value[0] < '0' || value[0] > '9' {
|
|
err = errBad
|
|
break
|
|
}
|
|
p, value = value[0:4], value[4:]
|
|
t.Year, err = strconv.Atoi64(p)
|
|
case stdMonth:
|
|
t.Month, value, err = lookup(shortMonthNames, value)
|
|
case stdLongMonth:
|
|
t.Month, value, err = lookup(longMonthNames, value)
|
|
case stdNumMonth, stdZeroMonth:
|
|
t.Month, value, err = getnum(value, std == stdZeroMonth)
|
|
if t.Month <= 0 || 12 < t.Month {
|
|
rangeErrString = "month"
|
|
}
|
|
case stdWeekDay:
|
|
t.Weekday, value, err = lookup(shortDayNames, value)
|
|
case stdLongWeekDay:
|
|
t.Weekday, value, err = lookup(longDayNames, value)
|
|
case stdDay, stdUnderDay, stdZeroDay:
|
|
if std == stdUnderDay && len(value) > 0 && value[0] == ' ' {
|
|
value = value[1:]
|
|
}
|
|
t.Day, value, err = getnum(value, std == stdZeroDay)
|
|
if t.Day < 0 || 31 < t.Day {
|
|
// TODO: be more thorough in date check?
|
|
rangeErrString = "day"
|
|
}
|
|
case stdHour:
|
|
t.Hour, value, err = getnum(value, false)
|
|
if t.Hour < 0 || 24 <= t.Hour {
|
|
rangeErrString = "hour"
|
|
}
|
|
case stdHour12, stdZeroHour12:
|
|
t.Hour, value, err = getnum(value, std == stdZeroHour12)
|
|
if t.Hour < 0 || 12 < t.Hour {
|
|
rangeErrString = "hour"
|
|
}
|
|
case stdMinute, stdZeroMinute:
|
|
t.Minute, value, err = getnum(value, std == stdZeroMinute)
|
|
if t.Minute < 0 || 60 <= t.Minute {
|
|
rangeErrString = "minute"
|
|
}
|
|
case stdSecond, stdZeroSecond:
|
|
t.Second, value, err = getnum(value, std == stdZeroSecond)
|
|
if t.Second < 0 || 60 <= t.Second {
|
|
rangeErrString = "second"
|
|
}
|
|
case stdISO8601TZ, stdISO8601ColonTZ, stdNumTZ, stdNumShortTZ, stdNumColonTZ:
|
|
if std[0] == 'Z' && len(value) >= 1 && value[0] == 'Z' {
|
|
value = value[1:]
|
|
t.Zone = "UTC"
|
|
break
|
|
}
|
|
var sign, hh, mm string
|
|
if std == stdISO8601ColonTZ || std == stdNumColonTZ {
|
|
if len(value) < 6 {
|
|
err = errBad
|
|
break
|
|
}
|
|
if value[3] != ':' {
|
|
err = errBad
|
|
break
|
|
}
|
|
sign, hh, mm, value = value[0:1], value[1:3], value[4:6], value[6:]
|
|
} else if std == stdNumShortTZ {
|
|
if len(value) < 3 {
|
|
err = errBad
|
|
break
|
|
}
|
|
sign, hh, mm, value = value[0:1], value[1:3], "00", value[3:]
|
|
} else {
|
|
if len(value) < 5 {
|
|
err = errBad
|
|
break
|
|
}
|
|
sign, hh, mm, value = value[0:1], value[1:3], value[3:5], value[5:]
|
|
}
|
|
var hr, min int
|
|
hr, err = strconv.Atoi(hh)
|
|
if err == nil {
|
|
min, err = strconv.Atoi(mm)
|
|
}
|
|
t.ZoneOffset = (hr*60 + min) * 60 // offset is in seconds
|
|
switch sign[0] {
|
|
case '+':
|
|
case '-':
|
|
t.ZoneOffset = -t.ZoneOffset
|
|
default:
|
|
err = errBad
|
|
}
|
|
case stdPM:
|
|
if len(value) < 2 {
|
|
err = errBad
|
|
break
|
|
}
|
|
p, value = value[0:2], value[2:]
|
|
if p == "PM" {
|
|
pmSet = true
|
|
} else if p != "AM" {
|
|
err = errBad
|
|
}
|
|
case stdpm:
|
|
if len(value) < 2 {
|
|
err = errBad
|
|
break
|
|
}
|
|
p, value = value[0:2], value[2:]
|
|
if p == "pm" {
|
|
pmSet = true
|
|
} else if p != "am" {
|
|
err = errBad
|
|
}
|
|
case stdTZ:
|
|
// Does it look like a time zone?
|
|
if len(value) >= 3 && value[0:3] == "UTC" {
|
|
t.Zone, value = value[0:3], value[3:]
|
|
break
|
|
}
|
|
|
|
if len(value) >= 3 && value[2] == 'T' {
|
|
p, value = value[0:3], value[3:]
|
|
} else if len(value) >= 4 && value[3] == 'T' {
|
|
p, value = value[0:4], value[4:]
|
|
} else {
|
|
err = errBad
|
|
break
|
|
}
|
|
for i := 0; i < len(p); i++ {
|
|
if p[i] < 'A' || 'Z' < p[i] {
|
|
err = errBad
|
|
}
|
|
}
|
|
if err != nil {
|
|
break
|
|
}
|
|
// It's a valid format.
|
|
t.Zone = p
|
|
// Can we find its offset?
|
|
if offset, found := lookupByName(p); found {
|
|
t.ZoneOffset = offset
|
|
}
|
|
}
|
|
if rangeErrString != "" {
|
|
return nil, &ParseError{alayout, avalue, std, value, ": " + rangeErrString + " out of range"}
|
|
}
|
|
if err != nil {
|
|
return nil, &ParseError{alayout, avalue, std, value, ""}
|
|
}
|
|
}
|
|
if pmSet && t.Hour < 12 {
|
|
t.Hour += 12
|
|
}
|
|
return &t, nil
|
|
}
|