diff options
author | joeybloggs <Dean.Karn@gmail.com> | 2016-08-16 04:59:49 +0300 |
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committer | joeybloggs <Dean.Karn@gmail.com> | 2016-08-16 04:59:49 +0300 |
commit | aaa28727a7fc0cc7add5d60b31abfe62b983bedd (patch) | |
tree | 032798ba24e7ab36f7532d5ae66df80805029538 /gv_IM | |
parent | 5e30685010ab9c6da8cc729a3e7eab0b1ae964ae (diff) |
add accounting currency formatting logic + function
Diffstat (limited to 'gv_IM')
-rw-r--r-- | gv_IM/gv_IM.go | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/gv_IM/gv_IM.go b/gv_IM/gv_IM.go index 4efd477c..49e6afd9 100644 --- a/gv_IM/gv_IM.go +++ b/gv_IM/gv_IM.go @@ -172,3 +172,79 @@ func (gv *gv_IM) FmtCurrency(num float64, v uint64, currency currency.Type) []by return b } + +// FmtAccounting returns the currency representation of 'num' with digits/precision of 'v' for 'gv_IM' +// 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 (gv *gv_IM) FmtAccounting(num float64, v uint64, currency currency.Type) []byte { + + s := strconv.FormatFloat(math.Abs(num), 'f', int(v), 64) + symbol := gv.currencies[currency] + l := len(s) + len(gv.decimal) + len(gv.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] == '.' { + for j := len(gv.decimal) - 1; j >= 0; j-- { + b = append(b, gv.decimal[j]) + } + + inWhole = true + + continue + } + + if inWhole { + if count == 3 { + for j := len(gv.group) - 1; j >= 0; j-- { + b = append(b, gv.group[j]) + } + + 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(gv.minus) - 1; j >= 0; j-- { + b = append(b, gv.minus[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, gv.decimal...) + } + + for i := 0; i < 2-int(v); i++ { + b = append(b, '0') + } + } + + return b +} |