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| author | Philipp Gesang <phg@phi-gamma.net> | 2017-02-04 13:50:34 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2017-02-04 13:50:34 +0100 |
| commit | 42f669beab39df38d2f4955b651541272126a04e (patch) | |
| tree | f68d918629725f9306698bf0641910d1f714714b /lualibs-number.lua | |
| parent | 144f6d16fd79bd0496b3ae379b69227e0d9bbfa9 (diff) | |
| parent | 1b2f8c0355210dbfd34b10ed4ff7f0c90fda062d (diff) | |
| download | lualibs-master.tar.gz | |
v2.5
Diffstat (limited to 'lualibs-number.lua')
| -rw-r--r-- | lualibs-number.lua | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/lualibs-number.lua b/lualibs-number.lua index 001ca31..c6f1e33 100644 --- a/lualibs-number.lua +++ b/lualibs-number.lua @@ -13,6 +13,7 @@ local tostring, tonumber = tostring, tonumber local format, floor, match, rep = string.format, math.floor, string.match, string.rep local concat, insert = table.concat, table.insert local lpegmatch = lpeg.match +local floor = math.floor number = number or { } local number = number @@ -205,3 +206,25 @@ end function number.bits(n) return { bits(n,1) } end + +function number.bytetodecimal(b) + local d = floor(b * 100 / 255 + 0.5) + if d > 100 then + return 100 + elseif d < -100 then + return -100 + else + return d + end +end + +function number.decimaltobyte(d) + local b = floor(d * 255 / 100 + 0.5) + if b > 255 then + return 255 + elseif b < -255 then + return -255 + else + return b + end +end |