Difference between revisions of "X File"

From GiderosMobile
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=== Description ===
 
=== Description ===
 
file object is usually returned by `io.open` used to manipulate (read and write) files in lua
 
file object is usually returned by `io.open` used to manipulate (read and write) files in lua
 +
=== Examples ===
 +
'''Copy a file'''<br/>
 +
<source lang="lua">local function copy(src, dst)
 +
local srcf = io.open(src, "rb")
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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
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srcf:close()
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dstf:close()
 +
end</source>
 
{|-
 
{|-
 
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| style="width: 50%;"|

Revision as of 10:45, 23 August 2018

Supported platforms: android, ios, mac, pc
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