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 /dz/dz.go | |
parent | 5e30685010ab9c6da8cc729a3e7eab0b1ae964ae (diff) |
add accounting currency formatting logic + function
Diffstat (limited to 'dz/dz.go')
-rw-r--r-- | dz/dz.go | 77 |
1 files changed, 77 insertions, 0 deletions
@@ -230,3 +230,80 @@ func (dz *dz) FmtCurrency(num float64, v uint64, currency currency.Type) []byte return b } + +// FmtAccounting returns the currency representation of 'num' with digits/precision of 'v' for 'dz' +// 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 (dz *dz) FmtAccounting(num float64, v uint64, currency currency.Type) []byte { + + s := strconv.FormatFloat(math.Abs(num), 'f', int(v), 64) + symbol := dz.currencies[currency] + l := len(s) + len(dz.decimal) + len(dz.group)*len(s[:len(s)-int(v)-1])/3 + count := 0 + inWhole := v == 0 + inSecondary := false + groupThreshold := 3 + + b := make([]byte, 0, l) + + for i := len(s) - 1; i >= 0; i-- { + + if s[i] == '.' { + b = append(b, dz.decimal[0]) + inWhole = true + + continue + } + + if inWhole { + + if count == groupThreshold { + b = append(b, dz.group[0]) + count = 1 + + if !inSecondary { + inSecondary = true + groupThreshold = 2 + } + } else { + count++ + } + } + + b = append(b, s[i]) + } + + if num < 0 { + + for j := len(symbol) - 1; j >= 0; j-- { + b = append(b, symbol[j]) + } + + b = append(b, dz.minus[0]) + + } 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, dz.decimal...) + } + + for i := 0; i < 2-int(v); i++ { + b = append(b, '0') + } + } + + return b +} |