diff options
Diffstat (limited to 'ln_CF')
-rw-r--r-- | ln_CF/ln_CF.go | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/ln_CF/ln_CF.go b/ln_CF/ln_CF.go index a21957a2..69f09dd6 100644 --- a/ln_CF/ln_CF.go +++ b/ln_CF/ln_CF.go @@ -194,3 +194,75 @@ func (ln *ln_CF) FmtCurrency(num float64, v uint64, currency currency.Type) []by return b } + +// FmtAccounting returns the currency representation of 'num' with digits/precision of 'v' for 'ln_CF' +// 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 (ln *ln_CF) FmtAccounting(num float64, v uint64, currency currency.Type) []byte { + + s := strconv.FormatFloat(math.Abs(num), 'f', int(v), 64) + symbol := ln.currencies[currency] + l := len(s) + len(ln.decimal) + len(ln.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, ln.decimal[0]) + inWhole = true + + continue + } + + if inWhole { + if count == 3 { + b = append(b, ln.group[0]) + count = 1 + } else { + count++ + } + } + + b = append(b, s[i]) + } + + if num < 0 { + + b = append(b, ln.minus[0]) + + } + + // 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, ln.decimal...) + } + + for i := 0; i < 2-int(v); i++ { + b = append(b, '0') + } + } + + if num < 0 { + + b = append(b, ln.currencyNegativeSuffix...) + + b = append(b, symbol...) + + } else { + + b = append(b, ln.currencyPositiveSuffix...) + + b = append(b, symbol...) + + } + + return b +} |