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bluepython508
2026-02-19 10:07:43 +00:00
parent 007438e372
commit 6e637ecf77
1763 changed files with 60820 additions and 279516 deletions
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199
vendor/github.com/go-json-experiment/json/arshal_time.go generated vendored
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@@ -2,6 +2,8 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build !goexperiment.jsonv2 || !go1.25
package json
import (
@@ -48,8 +50,11 @@ func makeTimeArshaler(fncs *arshaler, t reflect.Type) *arshaler {
if !m.initFormat(mo.Format) {
return newInvalidFormatError(enc, t, mo)
}
} else if mo.Flags.Get(jsonflags.FormatTimeWithLegacySemantics) {
} else if mo.Flags.Get(jsonflags.FormatDurationAsNano) {
return marshalNano(enc, va, mo)
} else {
// TODO(https://go.dev/issue/71631): Decide on default duration representation.
return newMarshalErrorBefore(enc, t, errors.New("no default representation (see https://go.dev/issue/71631); specify an explicit format"))
}
// TODO(https://go.dev/issue/62121): Use reflect.Value.AssertTo.
@@ -71,8 +76,11 @@ func makeTimeArshaler(fncs *arshaler, t reflect.Type) *arshaler {
if !u.initFormat(uo.Format) {
return newInvalidFormatError(dec, t, uo)
}
} else if uo.Flags.Get(jsonflags.FormatTimeWithLegacySemantics) {
} else if uo.Flags.Get(jsonflags.FormatDurationAsNano) {
return unmarshalNano(dec, va, uo)
} else {
// TODO(https://go.dev/issue/71631): Decide on default duration representation.
return newUnmarshalErrorBeforeWithSkipping(dec, uo, t, errors.New("no default representation (see https://go.dev/issue/71631); specify an explicit format"))
}
stringify := !u.isNumeric() || xd.Tokens.Last.NeedObjectName() || uo.Flags.Get(jsonflags.StringifyNumbers)
@@ -142,7 +150,7 @@ func makeTimeArshaler(fncs *arshaler, t reflect.Type) *arshaler {
if !u.initFormat(uo.Format) {
return newInvalidFormatError(dec, t, uo)
}
} else if uo.Flags.Get(jsonflags.FormatTimeWithLegacySemantics) {
} else if uo.Flags.Get(jsonflags.ParseTimeWithLooseRFC3339) {
u.looseRFC3339 = true
}
@@ -198,6 +206,7 @@ type durationArshaler struct {
// - 0 uses time.Duration.String
// - 1e0, 1e3, 1e6, or 1e9 use a decimal encoding of the duration as
// nanoseconds, microseconds, milliseconds, or seconds.
// - 8601 uses ISO 8601
base uint64
}
@@ -213,6 +222,8 @@ func (a *durationArshaler) initFormat(format string) (ok bool) {
a.base = 1e3
case "nano":
a.base = 1e0
case "iso8601":
a.base = 8601
default:
return false
}
@@ -220,13 +231,15 @@ func (a *durationArshaler) initFormat(format string) (ok bool) {
}
func (a *durationArshaler) isNumeric() bool {
return a.base != 0 && a.base != 60
return a.base != 0 && a.base != 8601
}
func (a *durationArshaler) appendMarshal(b []byte) ([]byte, error) {
switch a.base {
case 0:
return append(b, a.td.String()...), nil
case 8601:
return appendDurationISO8601(b, a.td), nil
default:
return appendDurationBase10(b, a.td, a.base), nil
}
@@ -236,6 +249,8 @@ func (a *durationArshaler) unmarshal(b []byte) (err error) {
switch a.base {
case 0:
a.td, err = time.ParseDuration(string(b))
case 8601:
a.td, err = parseDurationISO8601(b)
default:
a.td, err = parseDurationBase10(b, a.base)
}
@@ -410,7 +425,7 @@ func appendDurationBase10(b []byte, d time.Duration, pow10 uint64) []byte {
// parseDurationBase10 parses d from a decimal fractional number,
// where pow10 is a power-of-10 used to scale up the number.
func parseDurationBase10(b []byte, pow10 uint64) (time.Duration, error) {
suffix, neg := consumeSign(b) // consume sign
suffix, neg := consumeSign(b, false) // consume sign
wholeBytes, fracBytes := bytesCutByte(suffix, '.', true) // consume whole and frac fields
whole, okWhole := jsonwire.ParseUint(wholeBytes) // parse whole field; may overflow
frac, okFrac := parseFracBase10(fracBytes, pow10) // parse frac field
@@ -426,6 +441,166 @@ func parseDurationBase10(b []byte, pow10 uint64) (time.Duration, error) {
}
}
// appendDurationISO8601 appends an ISO 8601 duration with a restricted grammar,
// where leading and trailing zeroes and zero-value designators are omitted.
// It only uses hour, minute, and second designators since ISO 8601 defines
// those as being "accurate", while year, month, week, and day are "nominal".
func appendDurationISO8601(b []byte, d time.Duration) []byte {
if d == 0 {
return append(b, "PT0S"...)
}
b, n := mayAppendDurationSign(b, d)
b = append(b, "PT"...)
n, nsec := bits.Div64(0, n, 1e9) // compute nsec field
n, sec := bits.Div64(0, n, 60) // compute sec field
hour, min := bits.Div64(0, n, 60) // compute hour and min fields
if hour > 0 {
b = append(strconv.AppendUint(b, hour, 10), 'H')
}
if min > 0 {
b = append(strconv.AppendUint(b, min, 10), 'M')
}
if sec > 0 || nsec > 0 {
b = append(appendFracBase10(strconv.AppendUint(b, sec, 10), nsec, 1e9), 'S')
}
return b
}
// daysPerYear is the exact average number of days in a year according to
// the Gregorian calender, which has an extra day each year that is
// a multiple of 4, unless it is evenly divisible by 100 but not by 400.
// This does not take into account leap seconds, which are not deterministic.
const daysPerYear = 365.2425
var errInaccurateDateUnits = errors.New("inaccurate year, month, week, or day units")
// parseDurationISO8601 parses a duration according to ISO 8601-1:2019,
// section 5.5.2.2 and 5.5.2.3 with the following restrictions or extensions:
//
// - A leading minus sign is permitted for negative duration according
// to ISO 8601-2:2019, section 4.4.1.9. We do not permit negative values
// for each "time scale component", which is permitted by section 4.4.1.1,
// but rarely supported by parsers.
//
// - A leading plus sign is permitted (and ignored).
// This is not required by ISO 8601, but not forbidden either.
// There is some precedent for this as it is supported by the principle of
// duration arithmetic as specified in ISO 8601-2-2019, section 14.1.
// Of note, the JavaScript grammar for ISO 8601 permits a leading plus sign.
//
// - A fractional value is only permitted for accurate units
// (i.e., hour, minute, and seconds) in the last time component,
// which is permissible by ISO 8601-1:2019, section 5.5.2.3.
//
// - Both periods ('.') and commas (',') are supported as the separator
// between the integer part and fraction part of a number,
// as specified in ISO 8601-1:2019, section 3.2.6.
// While ISO 8601 recommends comma as the default separator,
// most formatters uses a period.
//
// - Leading zeros are ignored. This is not required by ISO 8601,
// but also not forbidden by the standard. Many parsers support this.
//
// - Lowercase designators are supported. This is not required by ISO 8601,
// but also not forbidden by the standard. Many parsers support this.
//
// If the nominal units of year, month, week, or day are present,
// this produces a best-effort value and also reports [errInaccurateDateUnits].
//
// The accepted grammar is identical to JavaScript's Duration:
//
// https://tc39.es/proposal-temporal/#prod-Duration
//
// We follow JavaScript's grammar as JSON itself is derived from JavaScript.
// The Temporal.Duration.toJSON method is guaranteed to produce an output
// that can be parsed by this function so long as arithmetic in JavaScript
// do not use a largestUnit value higher than "hours" (which is the default).
// Even if it does, this will do a best-effort parsing with inaccurate units,
// but report [errInaccurateDateUnits].
func parseDurationISO8601(b []byte) (time.Duration, error) {
var invalid, overflow, inaccurate, sawFrac bool
var sumNanos, n, co uint64
// cutBytes is like [bytes.Cut], but uses either c0 or c1 as the separator.
cutBytes := func(b []byte, c0, c1 byte) (prefix, suffix []byte, ok bool) {
for i, c := range b {
if c == c0 || c == c1 {
return b[:i], b[i+1:], true
}
}
return b, nil, false
}
// mayParseUnit attempts to parse another date or time number
// identified by the desHi and desLo unit characters.
// If the part is absent for current unit, it returns b as is.
mayParseUnit := func(b []byte, desHi, desLo byte, unit time.Duration) []byte {
number, suffix, ok := cutBytes(b, desHi, desLo)
if !ok || sawFrac {
return b // designator is not present or already saw fraction, which can only be in the last component
}
// Parse the number.
// A fraction allowed for the accurate units in the last part.
whole, frac, ok := cutBytes(number, '.', ',')
if ok {
sawFrac = true
invalid = invalid || len(frac) == len("") || unit > time.Hour
if unit == time.Second {
n, ok = parsePaddedBase10(frac, uint64(time.Second))
invalid = invalid || !ok
} else {
f, err := strconv.ParseFloat("0."+string(frac), 64)
invalid = invalid || err != nil || len(bytes.Trim(frac[len("."):], "0123456789")) > 0
n = uint64(math.Round(f * float64(unit))) // never overflows since f is within [0..1]
}
sumNanos, co = bits.Add64(sumNanos, n, 0) // overflow if co > 0
overflow = overflow || co > 0
}
for len(whole) > 1 && whole[0] == '0' {
whole = whole[len("0"):] // trim leading zeros
}
n, ok := jsonwire.ParseUint(whole) // overflow if !ok && MaxUint64
hi, lo := bits.Mul64(n, uint64(unit)) // overflow if hi > 0
sumNanos, co = bits.Add64(sumNanos, lo, 0) // overflow if co > 0
invalid = invalid || (!ok && n != math.MaxUint64)
overflow = overflow || (!ok && n == math.MaxUint64) || hi > 0 || co > 0
inaccurate = inaccurate || unit > time.Hour
return suffix
}
suffix, neg := consumeSign(b, true)
prefix, suffix, okP := cutBytes(suffix, 'P', 'p')
durDate, durTime, okT := cutBytes(suffix, 'T', 't')
invalid = invalid || len(prefix) > 0 || !okP || (okT && len(durTime) == 0) || len(durDate)+len(durTime) == 0
if len(durDate) > 0 { // nominal portion of the duration
durDate = mayParseUnit(durDate, 'Y', 'y', time.Duration(daysPerYear*24*60*60*1e9))
durDate = mayParseUnit(durDate, 'M', 'm', time.Duration(daysPerYear/12*24*60*60*1e9))
durDate = mayParseUnit(durDate, 'W', 'w', time.Duration(7*24*60*60*1e9))
durDate = mayParseUnit(durDate, 'D', 'd', time.Duration(24*60*60*1e9))
invalid = invalid || len(durDate) > 0 // unknown elements
}
if len(durTime) > 0 { // accurate portion of the duration
durTime = mayParseUnit(durTime, 'H', 'h', time.Duration(60*60*1e9))
durTime = mayParseUnit(durTime, 'M', 'm', time.Duration(60*1e9))
durTime = mayParseUnit(durTime, 'S', 's', time.Duration(1e9))
invalid = invalid || len(durTime) > 0 // unknown elements
}
d := mayApplyDurationSign(sumNanos, neg)
overflow = overflow || (neg != (d < 0) && d != 0) // overflows signed duration
switch {
case invalid:
return 0, fmt.Errorf("invalid ISO 8601 duration %q: %w", b, strconv.ErrSyntax)
case overflow:
return 0, fmt.Errorf("invalid ISO 8601 duration %q: %w", b, strconv.ErrRange)
case inaccurate:
return d, fmt.Errorf("invalid ISO 8601 duration %q: %w", b, errInaccurateDateUnits)
default:
return d, nil
}
}
// mayAppendDurationSign appends a negative sign if n is negative.
func mayAppendDurationSign(b []byte, d time.Duration) ([]byte, uint64) {
if d < 0 {
@@ -469,7 +644,7 @@ func appendTimeUnix(b []byte, t time.Time, pow10 uint64) []byte {
// parseTimeUnix parses t formatted as a decimal fractional number,
// where pow10 is a power-of-10 used to scale down the number.
func parseTimeUnix(b []byte, pow10 uint64) (time.Time, error) {
suffix, neg := consumeSign(b) // consume sign
suffix, neg := consumeSign(b, false) // consume sign
wholeBytes, fracBytes := bytesCutByte(suffix, '.', true) // consume whole and frac fields
whole, okWhole := jsonwire.ParseUint(wholeBytes) // parse whole field; may overflow
frac, okFrac := parseFracBase10(fracBytes, 1e9/pow10) // parse frac field
@@ -568,10 +743,14 @@ func parsePaddedBase10(b []byte, max10 uint64) (n uint64, ok bool) {
return n, true
}
// consumeSign consumes an optional leading negative sign.
func consumeSign(b []byte) ([]byte, bool) {
if len(b) > 0 && b[0] == '-' {
return b[len("-"):], true
// consumeSign consumes an optional leading negative or positive sign.
func consumeSign(b []byte, allowPlus bool) ([]byte, bool) {
if len(b) > 0 {
if b[0] == '-' {
return b[len("-"):], true
} else if b[0] == '+' && allowPlus {
return b[len("+"):], false
}
}
return b, false
}