From 621e49bb465f500cc46d47e39e828cf76d6381d7 Mon Sep 17 00:00:00 2001 From: Dimitri Sokolyuk Date: Tue, 24 Jul 2018 14:35:44 +0200 Subject: update vendor --- vendor/golang.org/x/text/currency/currency.go | 185 ++++++++++++++++++++++++++ 1 file changed, 185 insertions(+) create mode 100644 vendor/golang.org/x/text/currency/currency.go (limited to 'vendor/golang.org/x/text/currency/currency.go') diff --git a/vendor/golang.org/x/text/currency/currency.go b/vendor/golang.org/x/text/currency/currency.go new file mode 100644 index 0000000..598ddef --- /dev/null +++ b/vendor/golang.org/x/text/currency/currency.go @@ -0,0 +1,185 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:generate go run gen.go gen_common.go -output tables.go + +// Package currency contains currency-related functionality. +// +// NOTE: the formatting functionality is currently under development and may +// change without notice. +package currency // import "golang.org/x/text/currency" + +import ( + "errors" + "sort" + + "golang.org/x/text/internal/tag" + "golang.org/x/text/language" +) + +// TODO: +// - language-specific currency names. +// - currency formatting. +// - currency information per region +// - register currency code (there are no private use area) + +// TODO: remove Currency type from package language. + +// Kind determines the rounding and rendering properties of a currency value. +type Kind struct { + rounding rounding + // TODO: formatting type: standard, accounting. See CLDR. +} + +type rounding byte + +const ( + standard rounding = iota + cash +) + +var ( + // Standard defines standard rounding and formatting for currencies. + Standard Kind = Kind{rounding: standard} + + // Cash defines rounding and formatting standards for cash transactions. + Cash Kind = Kind{rounding: cash} + + // Accounting defines rounding and formatting standards for accounting. + Accounting Kind = Kind{rounding: standard} +) + +// Rounding reports the rounding characteristics for the given currency, where +// scale is the number of fractional decimals and increment is the number of +// units in terms of 10^(-scale) to which to round to. +func (k Kind) Rounding(cur Unit) (scale, increment int) { + info := currency.Elem(int(cur.index))[3] + switch k.rounding { + case standard: + info &= roundMask + case cash: + info >>= cashShift + } + return int(roundings[info].scale), int(roundings[info].increment) +} + +// Unit is an ISO 4217 currency designator. +type Unit struct { + index uint16 +} + +// String returns the ISO code of u. +func (u Unit) String() string { + if u.index == 0 { + return "XXX" + } + return currency.Elem(int(u.index))[:3] +} + +// Amount creates an Amount for the given currency unit and amount. +func (u Unit) Amount(amount interface{}) Amount { + // TODO: verify amount is a supported number type + return Amount{amount: amount, currency: u} +} + +var ( + errSyntax = errors.New("currency: tag is not well-formed") + errValue = errors.New("currency: tag is not a recognized currency") +) + +// ParseISO parses a 3-letter ISO 4217 currency code. It returns an error if s +// is not well-formed or not a recognized currency code. +func ParseISO(s string) (Unit, error) { + var buf [4]byte // Take one byte more to detect oversize keys. + key := buf[:copy(buf[:], s)] + if !tag.FixCase("XXX", key) { + return Unit{}, errSyntax + } + if i := currency.Index(key); i >= 0 { + if i == xxx { + return Unit{}, nil + } + return Unit{uint16(i)}, nil + } + return Unit{}, errValue +} + +// MustParseISO is like ParseISO, but panics if the given currency unit +// cannot be parsed. It simplifies safe initialization of Unit values. +func MustParseISO(s string) Unit { + c, err := ParseISO(s) + if err != nil { + panic(err) + } + return c +} + +// FromRegion reports the currency unit that is currently legal tender in the +// given region according to CLDR. It will return false if region currently does +// not have a legal tender. +func FromRegion(r language.Region) (currency Unit, ok bool) { + x := regionToCode(r) + i := sort.Search(len(regionToCurrency), func(i int) bool { + return regionToCurrency[i].region >= x + }) + if i < len(regionToCurrency) && regionToCurrency[i].region == x { + return Unit{regionToCurrency[i].code}, true + } + return Unit{}, false +} + +// FromTag reports the most likely currency for the given tag. It considers the +// currency defined in the -u extension and infers the region if necessary. +func FromTag(t language.Tag) (Unit, language.Confidence) { + if cur := t.TypeForKey("cu"); len(cur) == 3 { + c, _ := ParseISO(cur) + return c, language.Exact + } + r, conf := t.Region() + if cur, ok := FromRegion(r); ok { + return cur, conf + } + return Unit{}, language.No +} + +var ( + // Undefined and testing. + XXX Unit = Unit{} + XTS Unit = Unit{xts} + + // G10 currencies https://en.wikipedia.org/wiki/G10_currencies. + USD Unit = Unit{usd} + EUR Unit = Unit{eur} + JPY Unit = Unit{jpy} + GBP Unit = Unit{gbp} + CHF Unit = Unit{chf} + AUD Unit = Unit{aud} + NZD Unit = Unit{nzd} + CAD Unit = Unit{cad} + SEK Unit = Unit{sek} + NOK Unit = Unit{nok} + + // Additional common currencies as defined by CLDR. + BRL Unit = Unit{brl} + CNY Unit = Unit{cny} + DKK Unit = Unit{dkk} + INR Unit = Unit{inr} + RUB Unit = Unit{rub} + HKD Unit = Unit{hkd} + IDR Unit = Unit{idr} + KRW Unit = Unit{krw} + MXN Unit = Unit{mxn} + PLN Unit = Unit{pln} + SAR Unit = Unit{sar} + THB Unit = Unit{thb} + TRY Unit = Unit{try} + TWD Unit = Unit{twd} + ZAR Unit = Unit{zar} + + // Precious metals. + XAG Unit = Unit{xag} + XAU Unit = Unit{xau} + XPT Unit = Unit{xpt} + XPD Unit = Unit{xpd} +) -- cgit v1.2.3