445 lines
12 KiB
Lua
445 lines
12 KiB
Lua
-- Minetest: builtin/misc_helpers.lua
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--------------------------------------------------------------------------------
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function basic_dump(o)
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local tp = type(o)
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if tp == "number" then
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return tostring(o)
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elseif tp == "string" then
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return string.format("%q", o)
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elseif tp == "boolean" then
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return tostring(o)
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elseif tp == "nil" then
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return "nil"
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-- Uncomment for full function dumping support.
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-- Not currently enabled because bytecode isn't very human-readable and
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-- dump's output is intended for humans.
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--elseif tp == "function" then
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-- return string.format("loadstring(%q)", string.dump(o))
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else
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return string.format("<%s>", tp)
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end
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end
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--------------------------------------------------------------------------------
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-- Dumps values in a line-per-value format.
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-- For example, {test = {"Testing..."}} becomes:
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-- _["test"] = {}
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-- _["test"][1] = "Testing..."
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-- This handles tables as keys and circular references properly.
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-- It also handles multiple references well, writing the table only once.
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-- The dumped argument is internal-only.
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function dump2(o, name, dumped)
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name = name or "_"
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-- "dumped" is used to keep track of serialized tables to handle
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-- multiple references and circular tables properly.
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-- It only contains tables as keys. The value is the name that
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-- the table has in the dump, eg:
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-- {x = {"y"}} -> dumped[{"y"}] = '_["x"]'
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dumped = dumped or {}
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if type(o) ~= "table" then
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return string.format("%s = %s\n", name, basic_dump(o))
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end
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if dumped[o] then
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return string.format("%s = %s\n", name, dumped[o])
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end
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dumped[o] = name
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-- This contains a list of strings to be concatenated later (because
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-- Lua is slow at individual concatenation).
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local t = {}
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for k, v in pairs(o) do
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local keyStr
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if type(k) == "table" then
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if dumped[k] then
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keyStr = dumped[k]
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else
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-- Key tables don't have a name, so use one of
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-- the form _G["table: 0xFFFFFFF"]
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keyStr = string.format("_G[%q]", tostring(k))
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-- Dump key table
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table.insert(t, dump2(k, keyStr, dumped))
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end
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else
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keyStr = basic_dump(k)
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end
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local vname = string.format("%s[%s]", name, keyStr)
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table.insert(t, dump2(v, vname, dumped))
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end
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return string.format("%s = {}\n%s", name, table.concat(t))
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end
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--------------------------------------------------------------------------------
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-- This dumps values in a one-line format, like serialize().
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-- For example, {test = {"Testing..."}} becomes {["test"] = {[1] = "Testing..."}}
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-- This supports tables as keys, but not circular references.
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-- It performs poorly with multiple references as it writes out the full
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-- table each time.
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-- The dumped argument is internal-only.
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function dump(o, dumped)
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-- Same as "dumped" in dump2. The difference is that here it can only
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-- contain boolean (and nil) values since multiple references aren't
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-- handled properly.
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dumped = dumped or {}
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if type(o) == "table" then
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if dumped[o] then
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return "<circular reference>"
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end
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dumped[o] = true
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local t = {}
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for k, v in pairs(o) do
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k = dump(k, dumped)
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v = dump(v, dumped)
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table.insert(t, string.format("[%s] = %s", k, v))
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end
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return string.format("{%s}", table.concat(t, ", "))
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else
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return basic_dump(o)
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end
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end
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--------------------------------------------------------------------------------
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function string:split(sep)
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local sep, fields = sep or ",", {}
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local pattern = string.format("([^%s]+)", sep)
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self:gsub(pattern, function(c) fields[#fields+1] = c end)
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return fields
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end
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--------------------------------------------------------------------------------
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function file_exists(filename)
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local f = io.open(filename, "r")
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if f==nil then
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return false
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else
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f:close()
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return true
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end
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end
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--------------------------------------------------------------------------------
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function string:trim()
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return (self:gsub("^%s*(.-)%s*$", "%1"))
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end
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assert(string.trim("\n \t\tfoo bar\t ") == "foo bar")
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--------------------------------------------------------------------------------
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function math.hypot(x, y)
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local t
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x = math.abs(x)
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y = math.abs(y)
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t = math.min(x, y)
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x = math.max(x, y)
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if x == 0 then return 0 end
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t = t / x
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return x * math.sqrt(1 + t * t)
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end
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--------------------------------------------------------------------------------
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function get_last_folder(text,count)
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local parts = text:split(DIR_DELIM)
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if count == nil then
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return parts[#parts]
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end
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local retval = ""
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for i=1,count,1 do
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retval = retval .. parts[#parts - (count-i)] .. DIR_DELIM
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end
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return retval
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end
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--------------------------------------------------------------------------------
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function cleanup_path(temppath)
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local parts = temppath:split("-")
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temppath = ""
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for i=1,#parts,1 do
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if temppath ~= "" then
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temppath = temppath .. "_"
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end
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temppath = temppath .. parts[i]
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end
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parts = temppath:split(".")
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temppath = ""
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for i=1,#parts,1 do
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if temppath ~= "" then
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temppath = temppath .. "_"
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end
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temppath = temppath .. parts[i]
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end
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parts = temppath:split("'")
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temppath = ""
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for i=1,#parts,1 do
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if temppath ~= "" then
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temppath = temppath .. ""
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end
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temppath = temppath .. parts[i]
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end
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parts = temppath:split(" ")
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temppath = ""
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for i=1,#parts,1 do
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if temppath ~= "" then
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temppath = temppath
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end
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temppath = temppath .. parts[i]
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end
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return temppath
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end
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function core.formspec_escape(text)
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if text ~= nil then
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text = string.gsub(text,"\\","\\\\")
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text = string.gsub(text,"%]","\\]")
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text = string.gsub(text,"%[","\\[")
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text = string.gsub(text,";","\\;")
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text = string.gsub(text,",","\\,")
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end
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return text
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end
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function core.splittext(text,charlimit)
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local retval = {}
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local current_idx = 1
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local start,stop = string.find(text," ",current_idx)
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local nl_start,nl_stop = string.find(text,"\n",current_idx)
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local gotnewline = false
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if nl_start ~= nil and (start == nil or nl_start < start) then
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start = nl_start
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stop = nl_stop
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gotnewline = true
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end
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local last_line = ""
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while start ~= nil do
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if string.len(last_line) + (stop-start) > charlimit then
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table.insert(retval,last_line)
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last_line = ""
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end
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if last_line ~= "" then
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last_line = last_line .. " "
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end
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last_line = last_line .. string.sub(text,current_idx,stop -1)
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if gotnewline then
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table.insert(retval,last_line)
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last_line = ""
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gotnewline = false
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end
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current_idx = stop+1
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start,stop = string.find(text," ",current_idx)
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nl_start,nl_stop = string.find(text,"\n",current_idx)
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if nl_start ~= nil and (start == nil or nl_start < start) then
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start = nl_start
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stop = nl_stop
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gotnewline = true
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end
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end
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--add last part of text
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if string.len(last_line) + (string.len(text) - current_idx) > charlimit then
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table.insert(retval,last_line)
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table.insert(retval,string.sub(text,current_idx))
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else
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last_line = last_line .. " " .. string.sub(text,current_idx)
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table.insert(retval,last_line)
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end
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return retval
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end
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--------------------------------------------------------------------------------
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if INIT == "game" then
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local dirs1 = {9, 18, 7, 12}
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local dirs2 = {20, 23, 22, 21}
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function core.rotate_and_place(itemstack, placer, pointed_thing,
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infinitestacks, orient_flags)
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orient_flags = orient_flags or {}
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local unode = core.get_node_or_nil(pointed_thing.under)
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if not unode then
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return
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end
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local undef = core.registered_nodes[unode.name]
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if undef and undef.on_rightclick then
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undef.on_rightclick(pointed_thing.under, unode, placer,
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itemstack, pointed_thing)
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return
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end
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local pitch = placer:get_look_pitch()
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local fdir = core.dir_to_facedir(placer:get_look_dir())
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local wield_name = itemstack:get_name()
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local above = pointed_thing.above
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local under = pointed_thing.under
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local iswall = (above.y == under.y)
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local isceiling = not iswall and (above.y < under.y)
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local anode = core.get_node_or_nil(above)
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if not anode then
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return
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end
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local pos = pointed_thing.above
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local node = anode
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if undef and undef.buildable_to then
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pos = pointed_thing.under
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node = unode
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iswall = false
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end
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if core.is_protected(pos, placer:get_player_name()) then
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core.record_protection_violation(pos,
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placer:get_player_name())
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return
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end
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local ndef = core.registered_nodes[node.name]
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if not ndef or not ndef.buildable_to then
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return
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end
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if orient_flags.force_floor then
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iswall = false
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isceiling = false
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elseif orient_flags.force_ceiling then
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iswall = false
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isceiling = true
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elseif orient_flags.force_wall then
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iswall = true
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isceiling = false
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elseif orient_flags.invert_wall then
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iswall = not iswall
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end
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if iswall then
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core.set_node(pos, {name = wield_name,
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param2 = dirs1[fdir+1]})
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elseif isceiling then
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if orient_flags.force_facedir then
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core.set_node(pos, {name = wield_name,
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param2 = 20})
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else
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core.set_node(pos, {name = wield_name,
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param2 = dirs2[fdir+1]})
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end
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else -- place right side up
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if orient_flags.force_facedir then
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core.set_node(pos, {name = wield_name,
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param2 = 0})
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else
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core.set_node(pos, {name = wield_name,
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param2 = fdir})
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end
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end
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if not infinitestacks then
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itemstack:take_item()
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return itemstack
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end
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end
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--------------------------------------------------------------------------------
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--Wrapper for rotate_and_place() to check for sneak and assume Creative mode
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--implies infinite stacks when performing a 6d rotation.
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--------------------------------------------------------------------------------
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core.rotate_node = function(itemstack, placer, pointed_thing)
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core.rotate_and_place(itemstack, placer, pointed_thing,
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core.setting_getbool("creative_mode"),
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{invert_wall = placer:get_player_control().sneak})
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return itemstack
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end
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end
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--------------------------------------------------------------------------------
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function core.explode_table_event(evt)
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if evt ~= nil then
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local parts = evt:split(":")
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if #parts == 3 then
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local t = parts[1]:trim()
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local r = tonumber(parts[2]:trim())
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local c = tonumber(parts[3]:trim())
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if type(r) == "number" and type(c) == "number" and t ~= "INV" then
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return {type=t, row=r, column=c}
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end
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end
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end
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return {type="INV", row=0, column=0}
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end
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--------------------------------------------------------------------------------
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function core.explode_textlist_event(evt)
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if evt ~= nil then
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local parts = evt:split(":")
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if #parts == 2 then
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local t = parts[1]:trim()
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local r = tonumber(parts[2]:trim())
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if type(r) == "number" and t ~= "INV" then
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return {type=t, index=r}
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end
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end
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end
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return {type="INV", index=0}
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end
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function core.pos_to_string(pos)
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return "(" .. pos.x .. "," .. pos.y .. "," .. pos.z .. ")"
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end
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--------------------------------------------------------------------------------
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-- mainmenu only functions
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--------------------------------------------------------------------------------
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if INIT == "mainmenu" then
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function core.get_game(index)
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local games = game.get_games()
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if index > 0 and index <= #games then
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return games[index]
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end
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return nil
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end
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function fgettext(text, ...)
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text = core.gettext(text)
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local arg = {n=select('#', ...), ...}
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if arg.n >= 1 then
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-- Insert positional parameters ($1, $2, ...)
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result = ''
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pos = 1
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while pos <= text:len() do
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newpos = text:find('[$]', pos)
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if newpos == nil then
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result = result .. text:sub(pos)
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pos = text:len() + 1
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else
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paramindex = tonumber(text:sub(newpos+1, newpos+1))
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result = result .. text:sub(pos, newpos-1) .. tostring(arg[paramindex])
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pos = newpos + 2
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end
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end
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text = result
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end
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return core.formspec_escape(text)
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end
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end
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