diff options
author | joeybloggs <Dean.Karn@gmail.com> | 2016-08-13 05:28:58 +0300 |
---|---|---|
committer | joeybloggs <Dean.Karn@gmail.com> | 2016-08-13 05:28:58 +0300 |
commit | fb2acb93602d54a9be9ff735bcabbe17a66cb876 (patch) | |
tree | d492be134bef8c8cea3187a5bd47c6159ad12740 /yav_CM | |
parent | c934af383da7fcfcc5581f5474c094e703c86ff4 (diff) |
add FmtPercent logic.
Diffstat (limited to 'yav_CM')
-rw-r--r-- | yav_CM/yav_CM.go | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/yav_CM/yav_CM.go b/yav_CM/yav_CM.go index c02e898c..5a7a9e2d 100644 --- a/yav_CM/yav_CM.go +++ b/yav_CM/yav_CM.go @@ -112,3 +112,42 @@ func (yav *yav_CM) FmtNumber(num float64, v uint64) []byte { return b } + +// FmtPercent returns 'num' with digits/precision of 'v' for 'yav_CM' and handles both Whole and Real numbers based on 'v' +// returned as a []byte just in case the caller wishes to add more and can help +// avoid allocations; otherwise just cast as string. +// NOTE: 'num' passed into FmtPercent is assumed to be in percent already +func (yav *yav_CM) FmtPercent(num float64, v uint64) []byte { + + s := strconv.FormatFloat(math.Abs(num), 'f', int(v), 64) + l := len(s) + len(yav.decimal) + + b := make([]byte, 0, l) + + for i := len(s) - 1; i >= 0; i-- { + + if s[i] == '.' { + b = append(b, yav.decimal[0]) + continue + } + + b = append(b, s[i]) + } + + if num < 0 { + for j := len(yav.minus) - 1; j >= 0; j-- { + b = append(b, yav.minus[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] + } + + for j := len(yav.percent) - 1; j >= 0; j-- { + b = append(b, yav.percent[j]) + } + + return b +} |