diff options
author | joeybloggs <Dean.Karn@gmail.com> | 2016-08-16 04:59:49 +0300 |
---|---|---|
committer | joeybloggs <Dean.Karn@gmail.com> | 2016-08-16 04:59:49 +0300 |
commit | aaa28727a7fc0cc7add5d60b31abfe62b983bedd (patch) | |
tree | 032798ba24e7ab36f7532d5ae66df80805029538 /en | |
parent | 5e30685010ab9c6da8cc729a3e7eab0b1ae964ae (diff) |
add accounting currency formatting logic + function
Diffstat (limited to 'en')
-rw-r--r-- | en/en.go | 78 | ||||
-rw-r--r-- | en/en_test.go | 39 |
2 files changed, 116 insertions, 1 deletions
@@ -76,8 +76,8 @@ func (en *en) CardinalPluralRule(num float64, v uint64) locales.PluralRule { func (en *en) OrdinalPluralRule(num float64, v uint64) locales.PluralRule { n := math.Abs(num) - nMod10 := math.Mod(n, 10) nMod100 := math.Mod(n, 100) + nMod10 := math.Mod(n, 10) if nMod10 == 1 && nMod100 != 11 { return locales.PluralRuleOne @@ -233,3 +233,79 @@ func (en *en) FmtCurrency(num float64, v uint64, currency currency.Type) []byte return b } + +// FmtAccounting returns the currency representation of 'num' with digits/precision of 'v' for 'en' +// in accounting notation. returned as a []byte just in case the caller wishes to add more and can help +// avoid allocations; otherwise just cast as string. +func (en *en) FmtAccounting(num float64, v uint64, currency currency.Type) []byte { + + s := strconv.FormatFloat(math.Abs(num), 'f', int(v), 64) + symbol := en.currencies[currency] + l := len(s) + len(en.decimal) + len(en.group)*len(s[:len(s)-int(v)-1])/3 + count := 0 + inWhole := v == 0 + b := make([]byte, 0, l) + + for i := len(s) - 1; i >= 0; i-- { + + if s[i] == '.' { + b = append(b, en.decimal[0]) + inWhole = true + + continue + } + + if inWhole { + if count == 3 { + b = append(b, en.group[0]) + count = 1 + } else { + count++ + } + } + + b = append(b, s[i]) + } + + if num < 0 { + + for j := len(symbol) - 1; j >= 0; j-- { + b = append(b, symbol[j]) + } + + for j := len(en.currencyNegativePrefix) - 1; j >= 0; j-- { + b = append(b, en.currencyNegativePrefix[j]) + } + + } else { + + for j := len(symbol) - 1; j >= 0; j-- { + b = append(b, symbol[j]) + } + + } + + // reverse + for i, j := 0, len(b)-1; i < j; i, j = i+1, j-1 { + b[i], b[j] = b[j], b[i] + } + + if int(v) < 2 { + + if v == 0 { + b = append(b, en.decimal...) + } + + for i := 0; i < 2-int(v); i++ { + b = append(b, '0') + } + } + + if num < 0 { + + b = append(b, en.currencyNegativeSuffix...) + + } + + return b +} diff --git a/en/en_test.go b/en/en_test.go index 45ab2255..335feefa 100644 --- a/en/en_test.go +++ b/en/en_test.go @@ -44,3 +44,42 @@ func TestCurrency(t *testing.T) { } } } + +func TestAccounting(t *testing.T) { + + tests := []struct { + num float64 + v uint64 + expected string + }{ + { + num: 1123456.5643, + v: 2, + expected: "$1,123,456.56", + }, + { + num: 1123456.5643, + v: 1, + expected: "$1,123,456.60", + }, + { + num: 221123456.5643, + v: 3, + expected: "$221,123,456.564", + }, + { + num: -221123456.5643, + v: 3, + expected: "($221,123,456.564)", + }, + } + + trans := New() + + for _, tt := range tests { + s := string(trans.FmtAccounting(tt.num, tt.v, currency.USD)) + if s != tt.expected { + t.Errorf("Expected '%s' Got '%s", tt.expected, s) + } + } +} |