Difference between revisions of "X File"

From GiderosMobile
Line 1: Line 1:
 
__NOTOC__
 
__NOTOC__
'''<translate>Supported platforms</translate>:''' [[File:Platform android]][[File:Platform ios]][[File:Platform mac]][[File:Platform pc]]<br/>
+
'''<translate>Supported platforms</translate>:''' [[File:Platform android.png]][[File:Platform ios.png]][[File:Platform mac.png]][[File:Platform pc.png]]<br/>
 
'''<translate>Available since</translate>:''' Gideros 2011.6<br/>
 
'''<translate>Available since</translate>:''' Gideros 2011.6<br/>
 
=== <translate>Description</translate> ===
 
=== <translate>Description</translate> ===
<translate>file object is usually returned by `io.open` used to manipulate (read and write) files in lua</translate>
+
<translate>file object is usually returned by [[Special:MyLanguage/io.open|io.open]] used to manipulate (read and write) files in lua</translate>
 
=== <translate>Examples</translate> ===
 
=== <translate>Examples</translate> ===
 
'''Copy a file'''<br/>
 
'''Copy a file'''<br/>

Revision as of 09:36, 24 August 2018

Supported platforms: Platform android.pngPlatform ios.pngPlatform mac.pngPlatform pc.png
Available since: Gideros 2011.6

Description

file object is usually returned by io.open used to manipulate (read and write) files in lua

Examples

Copy a file

local function copy(src, dst)
	local srcf = io.open(src, "rb")
	local dstf = io.open(dst, "wb")
	local size = 2^13      -- good buffer size (8K)
	while true do
		local block = srcf:read(size)
		if not block then break end
		dstf:write(block)
	end
	srcf:close()
	dstf:close()
end

Methods

file:close closes file
file:flush saves any written data to file
file:lines returns iterator function to return lines, nil ends
file:read reads file according to given formats, returns read values or nil
file:seek sets file pos, whence="set"|"cur"|"end", defaults "curr",0, returns file pos
file:write writes strings or numbers to file

Events

Constants