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21 lines
464 B
21 lines
464 B
extern crate bstr;
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use std::error::Error;
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use std::io::{self, Write};
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use bstr::{io::BufReadExt, ByteSlice};
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fn main() -> Result<(), Box<dyn Error>> {
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let stdin = io::stdin();
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let mut stdout = io::BufWriter::new(io::stdout());
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let mut upper = vec![];
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stdin.lock().for_byte_line_with_terminator(|line| {
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upper.clear();
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line.to_uppercase_into(&mut upper);
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stdout.write_all(&upper)?;
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Ok(true)
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})?;
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Ok(())
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}
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