dmp 0.2.3

A high-performance library in that manipulates plain text
Documentation 
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use crate::Dmp;

pub fn fuzz(data: &[u8]) {
	if data.is_empty() {
		return;
	}
	let (flags, rest) = data.split_at(1);

	let flags = flags[0];
	let check_lines = flags & 1 == 1;
	let split = flags >> 1;

	if split as usize > rest.len() {
		return;
	}

	let (a, b) = rest.split_at(split as usize);

	let a = match std::str::from_utf8(a) {
		Ok(s) => s,
		Err(_) => return,
	};

	let b = match std::str::from_utf8(b) {
		Ok(s) => s,
		Err(_) => return,
	};

	// exercise a bunch of functions
	let dmp = Dmp::default();
	dmp.diff_main(a, b, check_lines);
	let _ = dmp.match_main(a, b, flags as i32);
	if let Ok(patches) = dmp.patch_from_text(a.to_string()) {
		dmp.patch_to_text(&patches);

		// don't expect this random patch to succeed but it shouldn't panic
		let _ = dmp.patch_apply(&patches, b);
	}

	// make sure the patches are valid
	let patches = dmp.patch_make1(a, b);
	let (applied, which) = dmp.patch_apply(&patches, a).unwrap();
	let b_patched = applied.into_iter().collect::<String>();
	assert_eq!(b, b_patched);
	assert!(which.into_iter().all(std::convert::identity));
}

#[cfg(test)]
mod tests {
	use super::fuzz;

	#[test]
	fn fuzz_1() {
		let data = &[
			247, 5, 48, 48, 48, 48, 48, 48, 48, 48, 19, 0, 118, 0, 14, 89, 93, 36, 64, 1, 0, 0, 0,
			0, 0, 0, 0, 64, 64, 64, 64, 64, 64, 64, 64, 10, 45, 0, 8, 0, 6, 0, 0, 37, 1, 1, 0, 59,
			10, 45, 0, 0, 0, 37, 1, 1, 0, 59, 10, 45, 0, 8, 0, 6, 0, 0, 37, 1, 0, 8, 0, 6, 0, 0,
			37, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
			0, 0, 0, 0, 0, 32, 59, 10, 45, 0, 0, 0, 37, 1, 1, 0, 59, 10, 45, 0, 8, 0, 6, 0, 0, 37,
			1, 0, 52, 52, 0, 0, 0, 10, 0, 52, 0, 0,
		];
		fuzz(data);
	}

	#[test]
	fn fuzz_2() {
		let data = &[
			247, 5, 48, 48, 48, 48, 48, 14, 91, 93, 36, 64, 1, 0, 0, 0, 0, 0, 0, 0, 64, 64, 64, 64,
			64, 24, 64, 64, 64, 10, 45, 0, 8, 0, 6, 0, 0, 37, 4, 1, 0, 59, 10, 45, 0, 49, 0, 0, 37,
			1, 1, 0, 59, 10, 45, 0, 8, 0, 6, 2, 0, 37, 1, 0, 8, 0, 6, 0, 0, 37, 1, 1, 0, 59, 10,
			45, 0, 0, 59, 37, 1, 0, 0, 1, 10, 45, 0, 8, 0, 6, 0, 0, 37, 1, 0, 8, 0, 6, 0, 0, 37, 1,
			0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
			0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 64, 10, 45, 0, 8, 0, 6, 0, 0, 37, 4, 0, 5, 0,
		];
		fuzz(data);
	}
}