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add function ExportScript.Tools.trim

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add function ExportScript.Tools.ltrim
add function ExportScript.Tools.rtrim
add function ExportScript.Tools.subst
This commit is contained in:
mcmicha 2016-12-22 01:58:45 +01:00
parent 6aea21b3bd
commit 923cc06b00
1 changed files with 37 additions and 0 deletions
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37
Scripts/DCS-ExportScript/lib/Tools.lua
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@ -85,6 +85,43 @@ function ExportScript.Tools.StrSplit(str, delim, maxNb)
return lResult
end
-- remove trailing and leading whitespace from string.
function ExportScript.Tools.trim(s)
return (s:gsub("^%s*(.-)%s*$", "%1"))
end
-- remove leading whitespace from string.
function ExportScript.Tools.ltrim(s)
return (s:gsub("^%s*", ""))
end
-- remove trailing whitespace from string.
function ExportScript.Tools.rtrim(s)
local n = #s
while n > 0 and s:find("^%s", n) do n = n - 1 end
return s:sub(1, n)
end
-- The following more obvious implementation is generally not
-- as efficient, particularly for long strings since Lua pattern matching
-- starts at the left (though in special cases it is more efficient).
-- Related discussion on p.197 of book "Beginning Lua Programming".
--[[
function ExportScript.Tools.rtrim(s)
return (s:gsub("%s*$", ""))
end
]]
-- substitute variables into string.
-- Example: subst("a=$(a),b=$(b)", {a=1, b=2}) --> "a=1,b=2".
function ExportScript.Tools.subst(s, t)
-- note: handle {a=false} substitution
s = s:gsub("%$%(([%w_]+)%)", function(name)
local val = t[name]
return val ~= nil and tostring(val)
end)
return s
end
function ExportScript.Tools.round(num, idp)
local lMult = 10^(idp or 0)
return math.floor(num * lMult + 0.5) / lMult