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v/vlib/io/io.v

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module io
const (
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buf_max_len = 1024
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)
pub fn cp(mut src Reader, mut dst Writer) ? {
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mut buf := []u8{len: io.buf_max_len}
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for {
len := src.read(mut buf) or { break }
dst.write(buf[..len]) or { return err }
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}
unsafe {
buf.free()
}
}