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time: make Weekday a method.

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Weekday is redundant information for a Time structure.
When parsing a time with a weekday specified, it can create an
incorrect Time value.
When parsing a time without a weekday specified, people
expect the weekday to be set.
Fix all three problems by computing the weekday on demand.

This is hard to gofix, since we must change the type of the node.
Since uses are rare and existing code will be caught by the compiler,
there is no gofix module here.

Fixes #2245.

R=golang-dev, bradfitz, rsc
CC=golang-dev
https://golang.org/cl/4974077
This commit is contained in:
Rob Pike 2011-09-12 11:47:55 -07:00
parent 9c6265d339
commit 7d43b84282
7 changed files with 57 additions and 47 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
src/pkg/asn1/asn1_test.go
View File

@ -206,10 +206,10 @@ type timeTest struct {
} }
var utcTestData = []timeTest{ var utcTestData = []timeTest{
{"910506164540-0700", true, &time.Time{1991, 05, 06, 16, 45, 40, 0, 0, -7 * 60 * 60, ""}}, {"910506164540-0700", true, &time.Time{1991, 05, 06, 16, 45, 40, 0, -7 * 60 * 60, ""}},
{"910506164540+0730", true, &time.Time{1991, 05, 06, 16, 45, 40, 0, 0, 7*60*60 + 30*60, ""}}, {"910506164540+0730", true, &time.Time{1991, 05, 06, 16, 45, 40, 0, 7*60*60 + 30*60, ""}},
{"910506234540Z", true, &time.Time{1991, 05, 06, 23, 45, 40, 0, 0, 0, "UTC"}}, {"910506234540Z", true, &time.Time{1991, 05, 06, 23, 45, 40, 0, 0, "UTC"}},
{"9105062345Z", true, &time.Time{1991, 05, 06, 23, 45, 0, 0, 0, 0, "UTC"}}, {"9105062345Z", true, &time.Time{1991, 05, 06, 23, 45, 0, 0, 0, "UTC"}},
{"a10506234540Z", false, nil}, {"a10506234540Z", false, nil},
{"91a506234540Z", false, nil}, {"91a506234540Z", false, nil},
{"9105a6234540Z", false, nil}, {"9105a6234540Z", false, nil},
@ -235,10 +235,10 @@ func TestUTCTime(t *testing.T) {
} }
var generalizedTimeTestData = []timeTest{ var generalizedTimeTestData = []timeTest{
{"20100102030405Z", true, &time.Time{2010, 01, 02, 03, 04, 05, 0, 0, 0, "UTC"}}, {"20100102030405Z", true, &time.Time{2010, 01, 02, 03, 04, 05, 0, 0, "UTC"}},
{"20100102030405", false, nil}, {"20100102030405", false, nil},
{"20100102030405+0607", true, &time.Time{2010, 01, 02, 03, 04, 05, 0, 0, 6*60*60 + 7*60, ""}}, {"20100102030405+0607", true, &time.Time{2010, 01, 02, 03, 04, 05, 0, 6*60*60 + 7*60, ""}},
{"20100102030405-0607", true, &time.Time{2010, 01, 02, 03, 04, 05, 0, 0, -6*60*60 - 7*60, ""}}, {"20100102030405-0607", true, &time.Time{2010, 01, 02, 03, 04, 05, 0, -6*60*60 - 7*60, ""}},
} }
func TestGeneralizedTime(t *testing.T) { func TestGeneralizedTime(t *testing.T) {
@ -475,7 +475,7 @@ var derEncodedSelfSignedCert = Certificate{
RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 3}, Value: "false.example.com"}}, RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 3}, Value: "false.example.com"}},
RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{1, 2, 840, 113549, 1, 9, 1}, Value: "false@example.com"}}, RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{1, 2, 840, 113549, 1, 9, 1}, Value: "false@example.com"}},
}, },
Validity: Validity{NotBefore: &time.Time{Year: 2009, Month: 10, Day: 8, Hour: 0, Minute: 25, Second: 53, Weekday: 0, ZoneOffset: 0, Zone: "UTC"}, NotAfter: &time.Time{Year: 2010, Month: 10, Day: 8, Hour: 0, Minute: 25, Second: 53, Weekday: 0, ZoneOffset: 0, Zone: "UTC"}}, Validity: Validity{NotBefore: &time.Time{Year: 2009, Month: 10, Day: 8, Hour: 0, Minute: 25, Second: 53, ZoneOffset: 0, Zone: "UTC"}, NotAfter: &time.Time{Year: 2010, Month: 10, Day: 8, Hour: 0, Minute: 25, Second: 53, ZoneOffset: 0, Zone: "UTC"}},
Subject: RDNSequence{ Subject: RDNSequence{
RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 6}, Value: "XX"}}, RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 6}, Value: "XX"}},
RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 8}, Value: "Some-State"}}, RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 8}, Value: "Some-State"}},

2
src/pkg/crypto/ocsp/ocsp_test.go
View File

@ -15,7 +15,7 @@ func TestOCSPDecode(t *testing.T) {
t.Error(err) t.Error(err)
} }
expected := Response{Status: 0, SerialNumber: []byte{0x1, 0xd0, 0xfa}, RevocationReason: 0, ThisUpdate: &time.Time{Year: 2010, Month: 7, Day: 7, Hour: 15, Minute: 1, Second: 5, Weekday: 0, ZoneOffset: 0, Zone: "UTC"}, NextUpdate: &time.Time{Year: 2010, Month: 7, Day: 7, Hour: 18, Minute: 35, Second: 17, Weekday: 0, ZoneOffset: 0, Zone: "UTC"}} expected := Response{Status: 0, SerialNumber: []byte{0x1, 0xd0, 0xfa}, RevocationReason: 0, ThisUpdate: &time.Time{Year: 2010, Month: 7, Day: 7, Hour: 15, Minute: 1, Second: 5, ZoneOffset: 0, Zone: "UTC"}, NextUpdate: &time.Time{Year: 2010, Month: 7, Day: 7, Hour: 18, Minute: 35, Second: 17, ZoneOffset: 0, Zone: "UTC"}}
if !reflect.DeepEqual(resp.ThisUpdate, resp.ThisUpdate) { if !reflect.DeepEqual(resp.ThisUpdate, resp.ThisUpdate) {
t.Errorf("resp.ThisUpdate: got %d, want %d", resp.ThisUpdate, expected.ThisUpdate) t.Errorf("resp.ThisUpdate: got %d, want %d", resp.ThisUpdate, expected.ThisUpdate)

2
src/pkg/http/cookie_test.go
View File

@ -124,7 +124,7 @@ var readSetCookiesTests = []struct {
Path: "/", Path: "/",
Domain: ".google.ch", Domain: ".google.ch",
HttpOnly: true, HttpOnly: true,
Expires: time.Time{Year: 2011, Month: 11, Day: 23, Hour: 1, Minute: 5, Second: 3, Weekday: 3, ZoneOffset: 0, Zone: "GMT"}, Expires: time.Time{Year: 2011, Month: 11, Day: 23, Hour: 1, Minute: 5, Second: 3, ZoneOffset: 0, Zone: "GMT"},
RawExpires: "Wed, 23-Nov-2011 01:05:03 GMT", RawExpires: "Wed, 23-Nov-2011 01:05:03 GMT",
Raw: "NID=99=YsDT5i3E-CXax-; expires=Wed, 23-Nov-2011 01:05:03 GMT; path=/; domain=.google.ch; HttpOnly", Raw: "NID=99=YsDT5i3E-CXax-; expires=Wed, 23-Nov-2011 01:05:03 GMT; path=/; domain=.google.ch; HttpOnly",
}}, }},

1
src/pkg/mail/message_test.go
View File

@ -94,7 +94,6 @@ func TestDateParsing(t *testing.T) {
Hour: 9, Hour: 9,
Minute: 55, Minute: 55,
Second: 6, Second: 6,
Weekday: 5, // Fri
ZoneOffset: -6 * 60 * 60, ZoneOffset: -6 * 60 * 60,
}, },
}, },

12
src/pkg/time/format.go
View File

@ -296,9 +296,9 @@ func (t *Time) Format(layout string) string {
case stdZeroMonth: case stdZeroMonth:
p = zeroPad(t.Month) p = zeroPad(t.Month)
case stdWeekDay: case stdWeekDay:
p = shortDayNames[t.Weekday] p = shortDayNames[t.Weekday()]
case stdLongWeekDay: case stdLongWeekDay:
p = longDayNames[t.Weekday] p = longDayNames[t.Weekday()]
case stdDay: case stdDay:
p = strconv.Itoa(t.Day) p = strconv.Itoa(t.Day)
case stdUnderDay: case stdUnderDay:
@ -485,7 +485,8 @@ func skip(value, prefix string) (string, os.Error) {
// (such as having the wrong day of the week), the returned value will also // (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 // 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 1..31, etc. // sane: hours in 0..23, minutes in 0..59, day of month in 1..31, etc.
// Years must be in the range 0000..9999. // Years must be in the range 0000..9999. The day of the week is checked
// for syntax but it is otherwise ignored.
func Parse(alayout, avalue string) (*Time, os.Error) { func Parse(alayout, avalue string) (*Time, os.Error) {
var t Time var t Time
rangeErrString := "" // set if a value is out of range rangeErrString := "" // set if a value is out of range
@ -538,9 +539,10 @@ func Parse(alayout, avalue string) (*Time, os.Error) {
rangeErrString = "month" rangeErrString = "month"
} }
case stdWeekDay: case stdWeekDay:
t.Weekday, value, err = lookup(shortDayNames, value) // Ignore weekday except for error checking.
_, value, err = lookup(shortDayNames, value)
case stdLongWeekDay: case stdLongWeekDay:
t.Weekday, value, err = lookup(longDayNames, value) _, value, err = lookup(longDayNames, value)
case stdDay, stdUnderDay, stdZeroDay: case stdDay, stdUnderDay, stdZeroDay:
if std == stdUnderDay && len(value) > 0 && value[0] == ' ' { if std == stdUnderDay && len(value) > 0 && value[0] == ' ' {
value = value[1:] value = value[1:]

23
src/pkg/time/time.go
View File

@ -22,7 +22,6 @@ type Time struct {
Month, Day int // Jan-2 is 1, 2 Month, Day int // Jan-2 is 1, 2
Hour, Minute, Second int // 15:04:05 is 15, 4, 5. Hour, Minute, Second int // 15:04:05 is 15, 4, 5.
Nanosecond int // Fractional second. Nanosecond int // Fractional second.
Weekday int // Sunday, Monday, ...
ZoneOffset int // seconds east of UTC, e.g. -7*60*60 for -0700 ZoneOffset int // seconds east of UTC, e.g. -7*60*60 for -0700
Zone string // e.g., "MST" Zone string // e.g., "MST"
} }
@ -63,12 +62,6 @@ func SecondsToUTC(sec int64) *Time {
t.Minute = int((sec / 60) % 60) t.Minute = int((sec / 60) % 60)
t.Second = int(sec % 60) t.Second = int(sec % 60)
// Day 0 = January 1, 1970 was a Thursday
t.Weekday = int((day + Thursday) % 7)
if t.Weekday < 0 {
t.Weekday += 7
}
// Change day from 0 = 1970 to 0 = 2001, // Change day from 0 = 1970 to 0 = 2001,
// to make leap year calculations easier // to make leap year calculations easier
// (2001 begins 4-, 100-, and 400-year cycles ending in a leap year.) // (2001 begins 4-, 100-, and 400-year cycles ending in a leap year.)
@ -228,3 +221,19 @@ func (t *Time) Seconds() int64 {
func (t *Time) Nanoseconds() int64 { func (t *Time) Nanoseconds() int64 {
return t.Seconds()*1e9 + int64(t.Nanosecond) return t.Seconds()*1e9 + int64(t.Nanosecond)
} }
// Weekday returns the time's day of the week. Sunday is day 0.
func (t *Time) Weekday() int {
sec := t.Seconds() + int64(t.ZoneOffset)
day := sec / secondsPerDay
sec -= day * secondsPerDay
if sec < 0 {
day--
}
// Day 0 = January 1, 1970 was a Thursday
weekday := int((day + Thursday) % 7)
if weekday < 0 {
weekday += 7
}
return weekday
}

48
src/pkg/time/time_test.go
View File

@ -30,31 +30,31 @@ type TimeTest struct {
} }
var utctests = []TimeTest{ var utctests = []TimeTest{
{0, Time{1970, 1, 1, 0, 0, 0, 0, Thursday, 0, "UTC"}}, {0, Time{1970, 1, 1, 0, 0, 0, 0, 0, "UTC"}},
{1221681866, Time{2008, 9, 17, 20, 4, 26, 0, Wednesday, 0, "UTC"}}, {1221681866, Time{2008, 9, 17, 20, 4, 26, 0, 0, "UTC"}},
{-1221681866, Time{1931, 4, 16, 3, 55, 34, 0, Thursday, 0, "UTC"}}, {-1221681866, Time{1931, 4, 16, 3, 55, 34, 0, 0, "UTC"}},
{-11644473600, Time{1601, 1, 1, 0, 0, 0, 0, Monday, 0, "UTC"}}, {-11644473600, Time{1601, 1, 1, 0, 0, 0, 0, 0, "UTC"}},
{599529660, Time{1988, 12, 31, 0, 1, 0, 0, Saturday, 0, "UTC"}}, {599529660, Time{1988, 12, 31, 0, 1, 0, 0, 0, "UTC"}},
{978220860, Time{2000, 12, 31, 0, 1, 0, 0, Sunday, 0, "UTC"}}, {978220860, Time{2000, 12, 31, 0, 1, 0, 0, 0, "UTC"}},
{1e18, Time{31688740476, 10, 23, 1, 46, 40, 0, Friday, 0, "UTC"}}, {1e18, Time{31688740476, 10, 23, 1, 46, 40, 0, 0, "UTC"}},
{-1e18, Time{-31688736537, 3, 10, 22, 13, 20, 0, Tuesday, 0, "UTC"}}, {-1e18, Time{-31688736537, 3, 10, 22, 13, 20, 0, 0, "UTC"}},
{0x7fffffffffffffff, Time{292277026596, 12, 4, 15, 30, 7, 0, Sunday, 0, "UTC"}}, {0x7fffffffffffffff, Time{292277026596, 12, 4, 15, 30, 7, 0, 0, "UTC"}},
{-0x8000000000000000, Time{-292277022657, 1, 27, 8, 29, 52, 0, Sunday, 0, "UTC"}}, {-0x8000000000000000, Time{-292277022657, 1, 27, 8, 29, 52, 0, 0, "UTC"}},
} }
var nanoutctests = []TimeTest{ var nanoutctests = []TimeTest{
{0, Time{1970, 1, 1, 0, 0, 0, 1e8, Thursday, 0, "UTC"}}, {0, Time{1970, 1, 1, 0, 0, 0, 1e8, 0, "UTC"}},
{1221681866, Time{2008, 9, 17, 20, 4, 26, 2e8, Wednesday, 0, "UTC"}}, {1221681866, Time{2008, 9, 17, 20, 4, 26, 2e8, 0, "UTC"}},
} }
var localtests = []TimeTest{ var localtests = []TimeTest{
{0, Time{1969, 12, 31, 16, 0, 0, 0, Wednesday, -8 * 60 * 60, "PST"}}, {0, Time{1969, 12, 31, 16, 0, 0, 0, -8 * 60 * 60, "PST"}},
{1221681866, Time{2008, 9, 17, 13, 4, 26, 0, Wednesday, -7 * 60 * 60, "PDT"}}, {1221681866, Time{2008, 9, 17, 13, 4, 26, 0, -7 * 60 * 60, "PDT"}},
} }
var nanolocaltests = []TimeTest{ var nanolocaltests = []TimeTest{
{0, Time{1969, 12, 31, 16, 0, 0, 1e8, Wednesday, -8 * 60 * 60, "PST"}}, {0, Time{1969, 12, 31, 16, 0, 0, 1e8, -8 * 60 * 60, "PST"}},
{1221681866, Time{2008, 9, 17, 13, 4, 26, 3e8, Wednesday, -7 * 60 * 60, "PDT"}}, {1221681866, Time{2008, 9, 17, 13, 4, 26, 3e8, -7 * 60 * 60, "PDT"}},
} }
func same(t, u *Time) bool { func same(t, u *Time) bool {
@ -65,7 +65,7 @@ func same(t, u *Time) bool {
t.Minute == u.Minute && t.Minute == u.Minute &&
t.Second == u.Second && t.Second == u.Second &&
t.Nanosecond == u.Nanosecond && t.Nanosecond == u.Nanosecond &&
t.Weekday == u.Weekday && t.Weekday() == u.Weekday() &&
t.ZoneOffset == u.ZoneOffset && t.ZoneOffset == u.ZoneOffset &&
t.Zone == u.Zone t.Zone == u.Zone
} }
@ -173,9 +173,9 @@ type TimeFormatTest struct {
} }
var rfc3339Formats = []TimeFormatTest{ var rfc3339Formats = []TimeFormatTest{
{Time{2008, 9, 17, 20, 4, 26, 0, Wednesday, 0, "UTC"}, "2008-09-17T20:04:26Z"}, {Time{2008, 9, 17, 20, 4, 26, 0, 0, "UTC"}, "2008-09-17T20:04:26Z"},
{Time{1994, 9, 17, 20, 4, 26, 0, Wednesday, -18000, "EST"}, "1994-09-17T20:04:26-05:00"}, {Time{1994, 9, 17, 20, 4, 26, 0, -18000, "EST"}, "1994-09-17T20:04:26-05:00"},
{Time{2000, 12, 26, 1, 15, 6, 0, Wednesday, 15600, "OTO"}, "2000-12-26T01:15:06+04:20"}, {Time{2000, 12, 26, 1, 15, 6, 0, 15600, "OTO"}, "2000-12-26T01:15:06+04:20"},
} }
func TestRFC3339Conversion(t *testing.T) { func TestRFC3339Conversion(t *testing.T) {
@ -323,8 +323,8 @@ func checkTime(time *Time, test *ParseTest, t *testing.T) {
if test.hasTZ && time.ZoneOffset != -28800 { if test.hasTZ && time.ZoneOffset != -28800 {
t.Errorf("%s: bad tz offset: %d not %d", test.name, time.ZoneOffset, -28800) t.Errorf("%s: bad tz offset: %d not %d", test.name, time.ZoneOffset, -28800)
} }
if test.hasWD && time.Weekday != 4 { if test.hasWD && time.Weekday() != 4 {
t.Errorf("%s: bad weekday: %d not %d", test.name, time.Weekday, 4) t.Errorf("%s: bad weekday: %d not %d", test.name, time.Weekday(), 4)
} }
} }
@ -450,11 +450,11 @@ func Test12AMIsMidnight(t *testing.T) {
// Check that a time without a Zone still produces a (numeric) time zone // Check that a time without a Zone still produces a (numeric) time zone
// when formatted with MST as a requested zone. // when formatted with MST as a requested zone.
func TestMissingZone(t *testing.T) { func TestMissingZone(t *testing.T) {
time, err := Parse(RubyDate, "Tue Feb 02 16:10:03 -0500 2006") time, err := Parse(RubyDate, "Thu Feb 02 16:10:03 -0500 2006")
if err != nil { if err != nil {
t.Fatal("error parsing date:", err) t.Fatal("error parsing date:", err)
} }
expect := "Tue Feb 2 16:10:03 -0500 2006" // -0500 not EST expect := "Thu Feb 2 16:10:03 -0500 2006" // -0500 not EST
str := time.Format(UnixDate) // uses MST as its time zone str := time.Format(UnixDate) // uses MST as its time zone
if str != expect { if str != expect {
t.Errorf("expected %q got %q", expect, str) t.Errorf("expected %q got %q", expect, str)