mirror of
https://github.com/sbrl/Minetest-WorldEditAdditions.git
synced 2024-07-02 01:44:55 +00:00
100 lines
2.8 KiB
Lua
100 lines
2.8 KiB
Lua
-- Licence: GPLv2 (MPL-2.0 is compatible, so we can use this here)
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-- Source: https://stackoverflow.com/a/43582076/1460422
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-- gsplit: iterate over substrings in a string separated by a pattern
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--
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-- Parameters:
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-- text (string) - the string to iterate over
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-- pattern (string) - the separator pattern
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-- plain (boolean) - if true (or truthy), pattern is interpreted as a plain
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-- string, not a Lua pattern
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--
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-- Returns: iterator
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--
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-- Usage:
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-- for substr in gsplit(text, pattern, plain) do
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-- doSomething(substr)
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-- end
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function worldeditadditions.gsplit(text, pattern, plain)
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local splitStart, length = 1, #text
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return function ()
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if splitStart then
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local sepStart, sepEnd = string.find(text, pattern, splitStart, plain)
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local ret
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if not sepStart then
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ret = string.sub(text, splitStart)
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splitStart = nil
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elseif sepEnd < sepStart then
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-- Empty separator!
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ret = string.sub(text, splitStart, sepStart)
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if sepStart < length then
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splitStart = sepStart + 1
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else
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splitStart = nil
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end
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else
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ret = sepStart > splitStart and string.sub(text, splitStart, sepStart - 1) or ''
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splitStart = sepEnd + 1
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end
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return ret
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end
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end
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end
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-- split: split a string into substrings separated by a pattern.
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--
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-- Parameters:
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-- text (string) - the string to iterate over
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-- pattern (string) - the separator pattern
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-- plain (boolean) - if true (or truthy), pattern is interpreted as a plain
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-- string, not a Lua pattern
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--
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-- Returns: table (a sequence table containing the substrings)
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function worldeditadditions.split(text, pattern, plain)
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local ret = {}
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for match in worldeditadditions.gsplit(text, pattern, plain) do
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table.insert(ret, match)
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end
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return ret
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end
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--- Pads str to length len with char from right
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-- @source https://snipplr.com/view/13092/strlpad--pad-string-to-the-left
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function worldeditadditions.str_padend(str, len, char)
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if char == nil then char = ' ' end
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return str .. string.rep(char, len - #str)
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end
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--- Pads str to length len with char from left
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-- Adapted from the above
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function worldeditadditions.str_padstart(str, len, char)
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if char == nil then char = ' ' end
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return string.rep(char, len - #str) .. str
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end
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function worldeditadditions.make_ascii_table(data)
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local extra_padding = 2
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local result = {}
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local max_lengths = {}
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for y = 1, #data, 1 do
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for x = 1, #data[y], 1 do
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if not max_lengths[x] then
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max_lengths[x] = 0
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end
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max_lengths[x] = math.max(max_lengths[x], #tostring(data[y][x]) + extra_padding)
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end
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end
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for _key, row in ipairs(data) do
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local row_result = {}
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for i = 1, #row, 1 do
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row_result[#row_result + 1] = worldeditadditions.str_padend(tostring(row[i]), max_lengths[i], " ")
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end
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result[#result+1] = table.concat(row_result, "")
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end
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-- TODO: Add multi-column support here
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return table.concat(result, "\n")
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end
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