diff options
Diffstat (limited to 'sk')
-rw-r--r-- | sk/sk.go | 77 |
1 files changed, 77 insertions, 0 deletions
@@ -269,3 +269,80 @@ func (sk *sk) FmtCurrency(num float64, v uint64, currency currency.Type) []byte return b } + +// FmtAccounting returns the currency representation of 'num' with digits/precision of 'v' for 'sk' +// 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 (sk *sk) FmtAccounting(num float64, v uint64, currency currency.Type) []byte { + + s := strconv.FormatFloat(math.Abs(num), 'f', int(v), 64) + symbol := sk.currencies[currency] + l := len(s) + len(sk.decimal) + len(sk.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, sk.decimal[0]) + inWhole = true + + continue + } + + if inWhole { + if count == 3 { + for j := len(sk.group) - 1; j >= 0; j-- { + b = append(b, sk.group[j]) + } + + count = 1 + } else { + count++ + } + } + + b = append(b, s[i]) + } + + if num < 0 { + + for j := len(sk.currencyNegativePrefix) - 1; j >= 0; j-- { + b = append(b, sk.currencyNegativePrefix[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, sk.decimal...) + } + + for i := 0; i < 2-int(v); i++ { + b = append(b, '0') + } + } + + if num < 0 { + + b = append(b, sk.currencyNegativeSuffix...) + + b = append(b, symbol...) + + } else { + + b = append(b, sk.currencyPositiveSuffix...) + + b = append(b, symbol...) + + } + + return b +} |