| 1 | module io |
| 2 | |
| 3 | // CopySettings provides additional options to io.cp |
| 4 | @[params] |
| 5 | pub struct CopySettings { |
| 6 | pub mut: |
| 7 | buffer_size int = 64 * 1024 // The buffer size used during the copying. A larger buffer is more performant, but uses more RAM. |
| 8 | } |
| 9 | |
| 10 | // cp copies from `src` to `dst` by allocating |
| 11 | // a maximum of 1024 bytes buffer for reading |
| 12 | // until either EOF is reached on `src` or an error occurs. |
| 13 | // An error is returned if an error is encountered during write. |
| 14 | @[manualfree] |
| 15 | pub fn cp(mut src Reader, mut dst Writer, params CopySettings) ! { |
| 16 | mut buf := []u8{len: params.buffer_size} |
| 17 | defer { |
| 18 | unsafe { |
| 19 | buf.free() |
| 20 | } |
| 21 | } |
| 22 | for { |
| 23 | bytes := src.read(mut buf) or { break } |
| 24 | dst.write(buf[..bytes]) or { return err } |
| 25 | } |
| 26 | } |
| 27 | |