mirror of
https://github.com/sbrl/Minetest-WorldEditAdditions.git
synced 2024-06-03 05:03:02 +00:00
84 lines
2.3 KiB
Lua
84 lines
2.3 KiB
Lua
function is_whitespace(char)
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return char == " " or char == "\t" or char == "\r" or char == "\n"
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end
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function split_shell(text)
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local text_length = #text
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local scan_pos = 1
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local result = { }
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local acc = {}
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local mode = "NORMAL" -- NORMAL, INSIDE_QUOTES_SINGLE, INSIDE_QUOTES_DOUBLE
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for i=1,text_length do
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local prevchar = ""
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local curchar = text:sub(i,i)
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local nextchar = ""
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local nextnextchar = ""
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if i > 1 then prevchar = text:sub(i-1, i-1) end
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if i < text_length then nextchar = text:sub(i+1, i+1) end
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if i+1 < text_length then nextnextchar = text:sub(i+2, i+2) end
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if mode == "NORMAL" then
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if is_whitespace(curchar) and #acc > 0 then
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table.insert(result, table.concat(acc, ""))
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acc = {}
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elseif (curchar == "\"" or curchar == "'") and #acc == 0 and prevchar ~= "\\" then
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if curchar == "\"" then
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mode = "INSIDE_QUOTES_DOUBLE"
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else
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mode = "INSIDE_QUOTES_SINGLE"
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end
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else
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table.insert(acc, curchar)
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end
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elseif mode == "INSIDE_QUOTES_DOUBLE" then
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if curchar == "\"" and prevchar ~= "\\" and is_whitespace(nextchar) then
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-- It's the end of a quote!
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mode = "NORMAL"
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elseif (curchar == "\\" and (
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nextchar ~= "\""
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or (nextchar == "\"" and not is_whitespace(nextnextchar))
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)) or curchar ~= "\\" then
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-- It's a regular character
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table.insert(acc, curchar)
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end
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elseif mode == "INSIDE_QUOTES_SINGLE" then
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if curchar == "'" and prevchar ~= "\\" and is_whitespace(nextchar) then
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-- It's the end of a quote!
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mode = "NORMAL"
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elseif (curchar == "\\" and (
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nextchar ~= "'"
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or (nextchar == "'" and not is_whitespace(nextnextchar))
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)) or curchar ~= "\\" then
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-- It's a regular character
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table.insert(acc, curchar)
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end
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end
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end
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if #acc > 0 then
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table.insert(result, table.concat(acc, ""))
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end
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return result
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end
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function test(text)
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print("Source", text)
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for i,value in ipairs(split_shell(text)) do
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print("i", i, "→", value)
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end
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print("************")
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end
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test("yay yay yay")
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test("yay \"yay yay\" yay")
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test("yay \"yay\\\" yay\" yay")
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test("yay \"yay 'inside quotes' yay\" yay")
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test("yay 'inside quotes' another")
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test("y\"ay \"yay 'in\\\"side quotes' yay\" y\\\"ay")
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-- for i=1,10000 do
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-- split_shell("y\"ay \"yay 'in\\\"side quotes' yay\" y\\\"ay")
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-- end
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