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67 lines
1.5 KiB
Go
67 lines
1.5 KiB
Go
// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
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package currency
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import (
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"time"
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"golang.org/x/text/language"
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)
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// This file contains code common to gen.go and the package code.
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const (
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cashShift = 3
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roundMask = 0x7
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nonTenderBit = 0x8000
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)
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// currencyInfo contains information about a currency.
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// bits 0..2: index into roundings for standard rounding
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// bits 3..5: index into roundings for cash rounding
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type currencyInfo byte
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// roundingType defines the scale (number of fractional decimals) and increments
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// in terms of units of size 10^-scale. For example, for scale == 2 and
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// increment == 1, the currency is rounded to units of 0.01.
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type roundingType struct {
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scale, increment uint8
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}
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// roundings contains rounding data for currencies. This struct is
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// created by hand as it is very unlikely to change much.
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var roundings = [...]roundingType{
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{2, 1}, // default
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{0, 1},
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{1, 1},
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{3, 1},
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{4, 1},
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{2, 5}, // cash rounding alternative
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{2, 50},
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}
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// regionToCode returns a 16-bit region code. Only two-letter codes are
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// supported. (Three-letter codes are not needed.)
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func regionToCode(r language.Region) uint16 {
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if s := r.String(); len(s) == 2 {
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return uint16(s[0])<<8 | uint16(s[1])
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}
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return 0
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}
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func toDate(t time.Time) uint32 {
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y := t.Year()
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if y == 1 {
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return 0
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}
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date := uint32(y) << 4
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date |= uint32(t.Month())
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date <<= 5
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date |= uint32(t.Day())
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return date
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}
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func fromDate(date uint32) time.Time {
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return time.Date(int(date>>9), time.Month((date>>5)&0xf), int(date&0x1f), 0, 0, 0, 0, time.UTC)
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}
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