-- Minetest: builtin/misc_helpers.lua
+--------------------------------------------------------------------------------
+-- Localize functions to avoid table lookups (better performance).
+local table_insert = table.insert
+local string_sub, string_find = string.sub, string.find
+
--------------------------------------------------------------------------------
function basic_dump(o)
local tp = type(o)
end
end
+local keywords = {
+ ["and"] = true,
+ ["break"] = true,
+ ["do"] = true,
+ ["else"] = true,
+ ["elseif"] = true,
+ ["end"] = true,
+ ["false"] = true,
+ ["for"] = true,
+ ["function"] = true,
+ ["goto"] = true, -- Lua 5.2
+ ["if"] = true,
+ ["in"] = true,
+ ["local"] = true,
+ ["nil"] = true,
+ ["not"] = true,
+ ["or"] = true,
+ ["repeat"] = true,
+ ["return"] = true,
+ ["then"] = true,
+ ["true"] = true,
+ ["until"] = true,
+ ["while"] = true,
+}
+local function is_valid_identifier(str)
+ if not str:find("^[a-zA-Z_][a-zA-Z0-9_]*$") or keywords[str] then
+ return false
+ end
+ return true
+end
+
--------------------------------------------------------------------------------
-- Dumps values in a line-per-value format.
-- For example, {test = {"Testing..."}} becomes:
-- the form _G["table: 0xFFFFFFF"]
keyStr = string.format("_G[%q]", tostring(k))
-- Dump key table
- table.insert(t, dump2(k, keyStr, dumped))
+ table_insert(t, dump2(k, keyStr, dumped))
end
else
keyStr = basic_dump(k)
end
local vname = string.format("%s[%s]", name, keyStr)
- table.insert(t, dump2(v, vname, dumped))
+ table_insert(t, dump2(v, vname, dumped))
end
return string.format("%s = {}\n%s", name, table.concat(t))
end
--------------------------------------------------------------------------------
--- This dumps values in a one-line format, like serialize().
--- For example, {test = {"Testing..."}} becomes {["test"] = {[1] = "Testing..."}}
+-- This dumps values in a one-statement format.
+-- For example, {test = {"Testing..."}} becomes:
+-- [[{
+-- test = {
+-- "Testing..."
+-- }
+-- }]]
-- This supports tables as keys, but not circular references.
-- It performs poorly with multiple references as it writes out the full
-- table each time.
--- The dumped argument is internal-only.
+-- The indent field specifies a indentation string, it defaults to a tab.
+-- Use the empty string to disable indentation.
+-- The dumped and level arguments are internal-only.
-function dump(o, dumped)
- -- Same as "dumped" in dump2. The difference is that here it can only
- -- contain boolean (and nil) values since multiple references aren't
- -- handled properly.
- dumped = dumped or {}
- if type(o) == "table" then
- if dumped[o] then
- return "<circular reference>"
- end
- dumped[o] = true
- local t = {}
- for k, v in pairs(o) do
- k = dump(k, dumped)
- v = dump(v, dumped)
- table.insert(t, string.format("[%s] = %s", k, v))
- end
- return string.format("{%s}", table.concat(t, ", "))
- else
+function dump(o, indent, nested, level)
+ if type(o) ~= "table" then
return basic_dump(o)
end
+ -- Contains table -> true/nil of currently nested tables
+ nested = nested or {}
+ if nested[o] then
+ return "<circular reference>"
+ end
+ nested[o] = true
+ indent = indent or "\t"
+ level = level or 1
+ local t = {}
+ local dumped_indexes = {}
+ for i, v in ipairs(o) do
+ table_insert(t, dump(v, indent, nested, level + 1))
+ dumped_indexes[i] = true
+ end
+ for k, v in pairs(o) do
+ if not dumped_indexes[k] then
+ if type(k) ~= "string" or not is_valid_identifier(k) then
+ k = "["..dump(k, indent, nested, level + 1).."]"
+ end
+ v = dump(v, indent, nested, level + 1)
+ table_insert(t, k.." = "..v)
+ end
+ end
+ nested[o] = nil
+ if indent ~= "" then
+ local indent_str = "\n"..string.rep(indent, level)
+ local end_indent_str = "\n"..string.rep(indent, level - 1)
+ return string.format("{%s%s%s}",
+ indent_str,
+ table.concat(t, ","..indent_str),
+ end_indent_str)
+ end
+ return "{"..table.concat(t, ", ").."}"
+end
+
+--------------------------------------------------------------------------------
+function string.split(str, delim, include_empty, max_splits, sep_is_pattern)
+ delim = delim or ","
+ max_splits = max_splits or -1
+ local items = {}
+ local pos, len, seplen = 1, #str, #delim
+ local plain = not sep_is_pattern
+ max_splits = max_splits + 1
+ repeat
+ local np, npe = string_find(str, delim, pos, plain)
+ np, npe = (np or (len+1)), (npe or (len+1))
+ if (not np) or (max_splits == 1) then
+ np = len + 1
+ npe = np
+ end
+ local s = string_sub(str, pos, np - 1)
+ if include_empty or (s ~= "") then
+ max_splits = max_splits - 1
+ table_insert(items, s)
+ end
+ pos = npe + 1
+ until (max_splits == 0) or (pos > (len + 1))
+ return items
end
--------------------------------------------------------------------------------
-function string:split(sep)
- local sep, fields = sep or ",", {}
- local pattern = string.format("([^%s]+)", sep)
- self:gsub(pattern, function(c) fields[#fields+1] = c end)
- return fields
+function table.indexof(list, val)
+ for i = 1, #list do
+ if list[i] == val then
+ return i
+ end
+ end
+ return -1
end
+assert(table.indexof({"foo", "bar"}, "foo") == 1)
+assert(table.indexof({"foo", "bar"}, "baz") == -1)
+
--------------------------------------------------------------------------------
function file_exists(filename)
local f = io.open(filename, "r")
- if f==nil then
+ if f == nil then
return false
else
f:close()
return x * math.sqrt(1 + t * t)
end
+--------------------------------------------------------------------------------
+function math.sign(x, tolerance)
+ tolerance = tolerance or 0
+ if x > tolerance then
+ return 1
+ elseif x < -tolerance then
+ return -1
+ end
+ return 0
+end
+
--------------------------------------------------------------------------------
function get_last_folder(text,count)
local parts = text:split(DIR_DELIM)
local current_idx = 1
- local start,stop = string.find(text," ",current_idx)
- local nl_start,nl_stop = string.find(text,"\n",current_idx)
+ local start,stop = string_find(text, " ", current_idx)
+ local nl_start,nl_stop = string_find(text, "\n", current_idx)
local gotnewline = false
if nl_start ~= nil and (start == nil or nl_start < start) then
start = nl_start
local last_line = ""
while start ~= nil do
if string.len(last_line) + (stop-start) > charlimit then
- table.insert(retval,last_line)
+ table_insert(retval, last_line)
last_line = ""
end
last_line = last_line .. " "
end
- last_line = last_line .. string.sub(text,current_idx,stop -1)
+ last_line = last_line .. string_sub(text, current_idx, stop - 1)
if gotnewline then
- table.insert(retval,last_line)
+ table_insert(retval, last_line)
last_line = ""
gotnewline = false
end
current_idx = stop+1
- start,stop = string.find(text," ",current_idx)
- nl_start,nl_stop = string.find(text,"\n",current_idx)
+ start,stop = string_find(text, " ", current_idx)
+ nl_start,nl_stop = string_find(text, "\n", current_idx)
if nl_start ~= nil and (start == nil or nl_start < start) then
start = nl_start
--add last part of text
if string.len(last_line) + (string.len(text) - current_idx) > charlimit then
- table.insert(retval,last_line)
- table.insert(retval,string.sub(text,current_idx))
+ table_insert(retval, last_line)
+ table_insert(retval, string_sub(text, current_idx))
else
- last_line = last_line .. " " .. string.sub(text,current_idx)
- table.insert(retval,last_line)
+ last_line = last_line .. " " .. string_sub(text, current_idx)
+ table_insert(retval, last_line)
end
return retval
local t = parts[1]:trim()
local r = tonumber(parts[2]:trim())
local c = tonumber(parts[3]:trim())
- if type(r) == "number" and type(c) == "number" and t ~= "INV" then
+ if type(r) == "number" and type(c) == "number"
+ and t ~= "INV" then
return {type=t, row=r, column=c}
end
end
end
--------------------------------------------------------------------------------
-function core.pos_to_string(pos)
- return "(" .. pos.x .. "," .. pos.y .. "," .. pos.z .. ")"
+function core.pos_to_string(pos, decimal_places)
+ local x = pos.x
+ local y = pos.y
+ local z = pos.z
+ if decimal_places ~= nil then
+ x = string.format("%." .. decimal_places .. "f", x)
+ y = string.format("%." .. decimal_places .. "f", y)
+ z = string.format("%." .. decimal_places .. "f", z)
+ end
+ return "(" .. x .. "," .. y .. "," .. z .. ")"
+end
+
+--------------------------------------------------------------------------------
+function core.string_to_pos(value)
+ if value == nil then
+ return nil
+ end
+
+ local p = {}
+ p.x, p.y, p.z = string.match(value, "^([%d.-]+)[, ] *([%d.-]+)[, ] *([%d.-]+)$")
+ if p.x and p.y and p.z then
+ p.x = tonumber(p.x)
+ p.y = tonumber(p.y)
+ p.z = tonumber(p.z)
+ return p
+ end
+ local p = {}
+ p.x, p.y, p.z = string.match(value, "^%( *([%d.-]+)[, ] *([%d.-]+)[, ] *([%d.-]+) *%)$")
+ if p.x and p.y and p.z then
+ p.x = tonumber(p.x)
+ p.y = tonumber(p.y)
+ p.z = tonumber(p.z)
+ return p
+ end
+ return nil
+end
+
+assert(core.string_to_pos("10.0, 5, -2").x == 10)
+assert(core.string_to_pos("( 10.0, 5, -2)").z == -2)
+assert(core.string_to_pos("asd, 5, -2)") == nil)
+
+--------------------------------------------------------------------------------
+function core.string_to_area(value)
+ local p1, p2 = unpack(value:split(") ("))
+ if p1 == nil or p2 == nil then
+ return nil
+ end
+
+ p1 = core.string_to_pos(p1 .. ")")
+ p2 = core.string_to_pos("(" .. p2)
+ if p1 == nil or p2 == nil then
+ return nil
+ end
+
+ return p1, p2
+end
+
+local function test_string_to_area()
+ local p1, p2 = core.string_to_area("(10.0, 5, -2) ( 30.2, 4, -12.53)")
+ assert(p1.x == 10.0 and p1.y == 5 and p1.z == -2)
+ assert(p2.x == 30.2 and p2.y == 4 and p2.z == -12.53)
+
+ p1, p2 = core.string_to_area("(10.0, 5, -2 30.2, 4, -12.53")
+ assert(p1 == nil and p2 == nil)
+
+ p1, p2 = core.string_to_area("(10.0, 5,) -2 fgdf2, 4, -12.53")
+ assert(p1 == nil and p2 == nil)
end
+test_string_to_area()
+
+--------------------------------------------------------------------------------
+function table.copy(t, seen)
+ local n = {}
+ seen = seen or {}
+ seen[t] = n
+ for k, v in pairs(t) do
+ n[(type(k) == "table" and (seen[k] or table.copy(k, seen))) or k] =
+ (type(v) == "table" and (seen[v] or table.copy(v, seen))) or v
+ end
+ return n
+end
--------------------------------------------------------------------------------
-- mainmenu only functions
--------------------------------------------------------------------------------
return nil
end
- function fgettext(text, ...)
+ function fgettext_ne(text, ...)
text = core.gettext(text)
local arg = {n=select('#', ...), ...}
if arg.n >= 1 then
-- Insert positional parameters ($1, $2, ...)
- result = ''
- pos = 1
+ local result = ''
+ local pos = 1
while pos <= text:len() do
- newpos = text:find('[$]', pos)
+ local newpos = text:find('[$]', pos)
if newpos == nil then
result = result .. text:sub(pos)
pos = text:len() + 1
else
- paramindex = tonumber(text:sub(newpos+1, newpos+1))
- result = result .. text:sub(pos, newpos-1) .. tostring(arg[paramindex])
+ local paramindex =
+ tonumber(text:sub(newpos+1, newpos+1))
+ result = result .. text:sub(pos, newpos-1)
+ .. tostring(arg[paramindex])
pos = newpos + 2
end
end
text = result
end
- return core.formspec_escape(text)
+ return text
+ end
+
+ function fgettext(text, ...)
+ return core.formspec_escape(fgettext_ne(text, ...))
end
end
projects / minetest.git / blobdiff