---
-- @module lcurl
do

--- Create HTTP multipart/formdata object.
--
-- @treturn[1] httpform new curl HTTP Post object context
function form() end

--- Create Easy object
--
-- @tparam[opt] table options
-- @treturn[1] easy new curl easy object
--
-- @usage
-- c = curl.easy{
--   url = 'http://example.com',
--   [curl.OPT_VERBOSE] = true,
-- }
--
function easy() end

--- Create Multi object
--
-- @tparam[opt] table options
-- @treturn[1] multi new curl multi object
--
-- @usage
-- m = curl.multi{
--   socketfunction = handle_socket;
--   timerfunction  = start_timeout;
-- }
--
function multi() end

--- Create Share object
--
-- @tparam[opt] table options
-- @treturn[1] share new curl share object
function share() end

--- Returns libcurl version as human readable string
--
function version() end

--- Returns libcurl version as table
--
-- @tparam[opt] string param specific version info
-- @treturn[1] table full version into if `param` was not specify
-- @return[2] specific info parameter
--
-- @usage
-- proto = curl.version_info('protocols')
-- if proto.HTTP then ... -- libcurl support http protocol
function version_info() end

--- File description table.
--
-- Representation for `struct curl_fileinfo`
--
-- @table curl_fileinfo
--
-- @tfield string  filename
-- @tfield integer filetype
-- @tfield integer time
-- @tfield integer perm
-- @tfield integer uid
-- @tfield integer gid
-- @tfield integer size
-- @tfield integer hardlinks
-- @tfield integer flags
-- @tfield table strings can have this string fields: `time`, `perm` , `user` , `group`, `target`

end

--- HTTP multipart/formdata object
-- @type httpform
--
do

--- Add new part to form.
--
-- @tparam string name provide the name of this part
-- @tparam string content actual data to send
-- @tparam[opt] string type provides the content-type for this part
-- @tparam[opt] table headers specifies extra headers for the form POST section
-- @return[1] self
function add_content() end

--- Add new part to form.
--
-- @tparam string name provide the name of this part
-- @tparam string filename provides the filename field in the content header
-- @tparam string content actual data to send
-- @tparam[opt] string type provides the content-type for this part
-- @tparam[opt] table headers specifies extra headers for the form POST section
-- @return[1] self
function add_buffer() end

--- Add new part to form.
--
-- @tparam string name provide the name of this part
-- @tparam string path path to file that contain actual data to send
-- @tparam[opt] string type provides the content-type for this part
-- @tparam[opt] string filename provides the filename field in the content header.
--   By default it is basename of path.
-- @tparam[opt] table headers specifies extra headers for the form POST section
-- @return[1] self
function add_file() end

--- Add new part to form.
--
-- @tparam string name provide the name of this part
-- @tparam[opt] string filename provides the filename field in the content header.
-- @tparam[opt] string type provides the content-type for this part
-- @tparam[opt] table headers specifies extra headers for the form POST section
-- @tparam number size stream size in bytes
-- @tparam function/object reader
-- @param[opt] context reader context
-- @return[1] self
--
-- @see easy:setopt_readfunction
function add_stream() end

--- Serialize multipart/formdata HTTP POST chain.
--
-- @return[1] string serialized data
--
-- @usage print(post:get())
--
function get() end

--- Serialize multipart/formdata HTTP POST chain.
--
-- Writer function can return true or number of written bytes.
-- Also if function does not return anything is considered as success.
--
-- @tparam function writer
-- @param[opt] context writer context
-- @return[1] self
--
-- @usage 
-- t = {}
-- post:get(table.insert, t)
-- print(table.concat(t))
--
function get() end

--- Serialize multipart/formdata HTTP POST chain.
--
-- This call same as httpform:get(writer.write, writer)
--
-- @tparam object writer
-- @return[1] self
--
-- @usage 
-- f = io.open(...)
-- post:get(f)
--
function get() end

--- Free multipart/formdata.
--
function free() end

end

--- Curl error object
-- @type error
--
do

--- Get the error category.
-- 
-- @treturn string string of error category (curl.ERROR_XXX constants)
-- 
-- @usage
-- if err:category() == curl.ERROR_EASY then
-- -- proceed easy error
-- end
function category       ()end

--- Get the number value of error.
-- 
-- @treturn number number of error (curl.E_XXX constants)
function no             ()end

--- Get the error name.
--
-- @treturn string error name (e.g. "UNSUPPORTED_PROTOCOL", "BAD_OPTION")
function name          ()end

--- Get the error description.
-- 
-- @treturn string error description (e.g. "Login denied")
function msg           ()end

--- Get the full error description.
--
-- @treturn string string that contain name, message and number of error
function __tostring    ()end

end

--- Easy curl object
-- @type easy
--
do

--- Perform a file transfer
-- 
-- @return[1] self
function perfom() end

--- URL encodes the given string
--
-- @tparam string url 
-- @return[1] encoded url
function escape() end

--- URL decodes the given string
--
-- @tparam string url
-- @return[1] decoded url
function unescape() end

--- Re-initializes all options previously set.
--
-- @treturn easy self
function reset() end

--- Pause and unpause a connection.
--
-- @tparam number mask set of bits that sets the new state of the connection (one of PAUSE_XXX constant)
-- @treturn easy self
function pause() end

--- End easy session
-- 
function close() end

--- Set options.
--
-- @tparam number|table opt one of `curl.OPT_XXX` constant or options table
-- @param ... value
-- @treturn easy self
--
-- @usage
-- c:setopt(curl.OPT_URL, "http://example.com")
-- c:setopt(curl.OPT_READFUNCTION,
--    function(t, n) return table.remove(t) end,
--    {"1111", "2222"}
-- )
--c:setopt{
--   url = 'http://example.com',
--   [curl.OPT_VERBOSE] = true,
-- }
function setopt() end

--- Reset option to default value.
--
-- @tparam number opt one of `curl.OPT_XXX` constant or options table
-- @treturn easy self
--
-- @usage
-- c:unsetopt(curl.OPT_URL)
-- c:unsetopt(curl.OPT_READFUNCTION)
function unsetopt() end

--- Get information.
--
-- @tparam number info one of `curl.INFO_XXX` constant
-- @return value
--
-- @usage
-- print(c:getinfo(curl.INFO_EFFECTIVE_URL))
-- print(c:getinfo(curl.INFO_TOTAL_TIME))
-- print(c:getinfo(curl.INFO_RESPONSE_CODE))
function getinfo() end

--- Set writer function.
--
-- A callback accepting one or two parameters.
-- The first is the writer context if any, and the second is a string with the data to be written.
-- Function must return `true` (any non number true value) or full data length or nothing to continue operation.
-- Otherwise the transfer will be aborted with an error.
--
-- @tparam function writer
-- @param[opt] context writer context
-- @return[1] self
--
function setopt_writefunction() end

--- Set writer function.
--
-- This call same as easy:setopt_writefunction(writer.write, writer)
--
-- @tparam object writer
-- @return[1] self
--
function setopt_writefunction() end

--- Set header function.
--
-- A callback accepting one or two parameters.
-- The first is the writer context if any, and the second is a string with the data to be written.
-- Function must return `true` (any non number true value) or full data length or nothing to continue operation.
-- Otherwise the transfer will be aborted with an error.
--
-- @tparam function writer
-- @param[opt] context writer context
-- @return[1] self
--
function setopt_headerfunction() end

--- Set header function.
--
-- This call same as easy:setopt_headerfunction(writer.header, writer)
--
-- @tparam object writer
-- @return[1] self
--
function setopt_headerfunction() end

--- Set reader function.
--
-- A callback accepting one or two parameters.
-- The first is the reader context if any, and the second is the maximum amount of data to be read.
-- You can ignore second argument and pass as mach data as you need. lcurl can split data.
-- Function must return data to continue operation. To stop operation it must return empty string or nil or nothing.
-- Otherwise the transfer will be aborted with an error.
-- 
--
-- @tparam function reader
-- @param[opt] context reader context
-- @return[1] self
--
-- @usage
-- local counter = 10
-- c:setopt_readfunction(function()
--   if counter > 0 then
--     counter = counter - 1
--     return 'a'
--   end
-- end)
function setopt_readfunction() end

--- Set reader function.
--
-- This call same as easy:setopt_readfunction(reader.read, reader)
--
-- @tparam object reader
-- @return[1] self
--
function setopt_readfunction() end

--- Set progress function.
--
-- A callback accepting four or five parameters.
-- The first is the reader context if any, the second is the total number
-- of bytes expected to be downloaded in this transfer,
-- the third is the number of bytes downloaded so far,
-- the fourth is the total number of bytes expected to be uploaded
-- in this transfer, and the fifth is the number of bytes uploaded so far.
-- Function must return `true` or `1` or nothing to continue operation.
-- Otherwise the transfer will be aborted with an error `ABORTED_BY_CALLBACK`.<br/>
--
-- !!! NOTE !!! This is differents form libcurl API. In libcurl returning a non-zero 
-- value from this callback will cause libcurl to abort the transfer and return.
-- This done to be consisted with writefunction that should return `true` to continue.
--
-- @tparam function progress
-- @param[opt] context progress context
-- @return[1] self
--
function setopt_progressfunction() end

--- Set progress function.
--
-- This call same as easy:setopt_progressfunction(progress.progress, progress)
--
-- @tparam object progress
-- @return[1] self
--
function setopt_progressfunction() end

--- Set seek callback function.
--
-- A callback accepting two or three parameters.
-- The first is the seek context if any, the second is the `origin` value
-- same as in file.seek function from io library. Can be (`cur`, `set` and `end`).
-- The third parameter is offset or position in input stream.
-- If stream can not be seeking and need stop current transfer operation
-- function have to raise Lua error or returns `nil` and error message.
-- To indicate success function have to return any truthy value
-- In other case Function must return `true` or `1` or nothing to continue operation.
-- False value indicate that while the seek failed, libcurl is free to work
-- around the problem if possible.
--
-- !!! NOTE !!! This is differents form libcurl API by swapping parameters in callback.
-- It done to be compatiable with Lua io library.
--
-- @tparam function seek
-- @param[opt] context seek context
-- @return[1] self
--
function setopt_seekfunction() end

--- Set seek callback function.
--
-- This call same as easy:setopt_seekfunction(stream.seek, seek)
--
-- @tparam object stream
-- @return[1] self
--
function setopt_seekfunction() end

--- Set debug callback function.
--
-- A callback accepting two or three parameters.
-- The first is the debug context if any, the second is the `data_type` value
-- which represent what kinde of data is passed. This value can be one of 
-- constant `INFO_TEXT`, `INFO_HEADER_IN`, `INFO_HEADER_OUT`, `INFO_DATA_IN`,
-- `INFO_DATA_OUT`, `INFO_SSL_DATA_IN`, `INFO_SSL_DATA_OUT`.
-- The third parameter is data itself.
-- Any errors and returning values from this callback are ignored.
--
-- @tparam function debug
-- @param[opt] context debug context
-- @return[1] self
--
function setopt_debugfunction() end

--- Set debug callback function.
--
-- This call same as easy:setopt_debugfunction(debug.debug, debug)
--
-- @tparam object debug
-- @return[1] self
--
function setopt_debugfunction() end

--- Set match callback function.
--
-- A callback accepting two or three parameters.
-- The first is the match context if any, the second is the pattern string,
-- the third is the string to match to pattern.
-- Function must return truthy value to indicate that string match to pattern.
-- If function raise error or return nil and error message then it indicate
-- that curl should interrupt current transfer operation.
-- False value indicate that strind does not match to pattern
--
-- @tparam function match
-- @param[opt] context match context
-- @return[1] self
--
function setopt_fnmatch_function() end

--- Set match callback function.
--
-- This call same as easy:setopt_fnmatch_function(match.match, match)
--
-- @tparam object match
-- @return[1] self
--
function setopt_fnmatch_function() end


--- Set chunk begin function.
--
-- A callback accepting two or three parameters.
-- The first is the chunk context if any, the second is the @{curl_fileinfo} table.
-- The third parameter contains number of chunks remaining per the transfer.
-- Function must return truthy value or nothing to indicate that transfer can begin.
-- If function raise error or return nil and error message then it indicate
-- that curl should interrupt current transfer operation.
-- False value indicate that curl should skip this chunk.
--
-- @tparam function chunk_bgn
-- @param[opt] context chunk context
-- @return[1] self
--
function setopt_chunk_bgn_function() end

--- Set chunk begin function.
--
-- This call same as easy:setopt_chunk_bgn_function(context.chunk_bgn, context)
--
-- @tparam object context
-- @return[1] self
--
function setopt_chunk_bgn_function() end

--- Set chunk end function.
--
-- A callback accepting zero or one parameter.
-- The only parameter is the chunk context if any.
-- Function must return truthy value or nothing to indicate that transfer can continue
-- otherwise it indicate that curl should interrupt current transfer operation.
--
-- @tparam function chunk_end
-- @param[opt] context chunk context
-- @return[1] self
--
function setopt_chunk_end_function() end

--- Set chunk begin function.
--
-- This call same as easy:setopt_chunk_end_function(context.chunk_end, context)
--
-- @tparam object context
-- @return[1] self
--
function setopt_chunk_end_function() end

--- Set HTTP multipart/formdata.
--
-- Caller does not have to save data.
--
-- @tparam httpform data
-- @return[1] self
function setopt_httppost() end

--- Set HTTP multipart/formdata.
--
-- @tparam string data
-- @tparam[opt=#data] number length
-- @return[1] self
function setopt_postfields() end

--- Set curl share object.
--
-- Caller does not have to save data.
--
-- @tparam share data
-- @return[1] self
function setopt_share() end

end

--- Muli curl object
-- @type multi
--
do

--- Add Easy object.
--
-- Caller must ensure that easy object is alive until end of operation.
--
-- @treturn multi self
-- @tparam easy handle
function add_handle() end

--- Remove Easy object.
--
-- @tparam easy handle
-- @treturn multi self
function remove_handle() end

--- reads/writes available data from each easy handle.
--
-- @treturn number handles number of active easy handles
function perfom() end

--- Read multi stack informationals.
--
-- Note. If curl_multi_remove_handle fail then there no error occure but handle jast stay in multi handle.
--
-- @tparam[opt] remove remove easy handle if it done.
-- @treturn[1] number 0 there no informationals
-- @treturn[2] easy handle
-- @treturn[2] boolean true
-- @treturn[3] easy handle
-- @treturn[3] nil
-- @treturn[3] error error code
function info_read() end

--- Set options.
--
-- @tparam number|table opt one of `curl.OPT_MULTI_XXX` constant
-- @param ... value
-- @treturn multi self
--
-- @usage
-- c:setopt(curl.OPT_MULTI_MAXCONNECTS, 10)
-- c:setopt{maxconnects = 10}
function setopt() end

--- Perform socket action.
--
-- @tparam[opt=curl.SOCKET_TIMEOUT] number socket
-- @tparam[opt=0] number mask
-- @treturn multi self
--
-- @usage
-- c:socket_action()
-- c:socket_action(sock_fd, curl.CSELECT_IN)
-- c:socket_action(sock_fd, curl.CSELECT_OUT)
function socket_action() end

--- Set timer callback.
--
-- @tparam function timer timer callback
-- @param[opt] context timer context
-- @treturn multi self
--
function setopt_timerfunction() end

--- Set timer callback.
--
-- This call same as easy:setopt_writefunction(timer.timer, timer)
--
-- @tparam userdata|table timer timer object
-- @treturn multi self
--
function setopt_timerfunction() end

--- Polls on all easy objects in a multi object.
--
-- @tparam[opt] number timeout milliseconds timeout. By default it is `multi:timeout()`.
-- @treturn number number of affected objects
--
function wait() end

--- How long to wait for action before proceeding.
--
-- @treturn number timeout milliseconds timeout
--
function timeout() end

--- End multi session.
--
function close() end

end

--- Share curl object
-- @type share
--
do

--- Set options.
--
-- @tparam number|table opt one of `curl.OPT_SHARE_XXX` constant
-- @param ... value
-- @treturn share self
--
-- @usage
-- c:setopt(curl.OPT_SHARE_SHARE, curl.LOCK_DATA_COOKIE)
-- c:setopt{share =  curl.LOCK_DATA_COOKIE}
function setopt() end

--- End share session.
--
function close() end

end