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Truncate a file: Difference between revisions
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=={{header|Lingo}}==
With native means (Fileio Xtra) file truncation can only be implemented indirectly, either using a temp file or loading truncated file contents into memory, deleting original and writing memory back to file
<lang lingo>----------------------------------------
-- Truncates file
But there are free plugins ("Xtras") like e.g. "BinFile Xtra" that support "in-file" truncation:▼
-- @param {string} filename
-- @param {integer} length
-- @return {bool}
----------------------------------------
on truncate (filename, length)
fp = xtra("fileIO").new()
fp.openFile(filename, 0)
data = fp.readByteArray(length)
fp.delete()
fp.createFile(filename)
fp.openFile(filename, 2)
fp.writeByteArray(data)
err = fp.status()
fp.closeFile()
fp=0
return (err=0)
end</lang>
▲But there are also free plugins ("Xtras") like e.g. "BinFile Xtra" that support "in-file" truncation:
{{libheader|BinFile Xtra}}
<lang lingo>-- truncates file to 10 KB length
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