Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 181 insertions, 0 deletions

diff --git a/third_party/rust/murmurhash3/src/mmh3_128.rs b/third_party/rust/murmurhash3/src/mmh3_128.rs
new file mode 100644
index 0000000000..b748f0fd93
--- /dev/null
+++ b/third_party/rust/murmurhash3/src/mmh3_128.rs
@@ -0,0 +1,181 @@
+use std::mem;
+
+fn fmix64(mut k: u64) -> u64 {
+    k ^= k >> 33;
+    k = k.wrapping_mul(0xff51afd7ed558ccdu64);
+    k ^= k >> 33;
+    k = k.wrapping_mul(0xc4ceb9fe1a85ec53u64);
+    k ^= k >> 33;
+
+    return k;
+}
+
+fn get_128_block(bytes: &[u8], index: usize) -> (u64, u64) {
+    let b64: &[u64] = unsafe { mem::transmute(bytes) };
+
+    return (b64[index], b64[index + 1]);
+}
+
+pub fn murmurhash3_x64_128(bytes: &[u8], seed: u64) -> (u64, u64) {
+    let c1 = 0x87c37b91114253d5u64;
+    let c2 = 0x4cf5ad432745937fu64;
+    let read_size = 16;
+    let len = bytes.len() as u64;
+    let block_count = len / read_size;
+
+    let (mut h1, mut h2) = (seed, seed);
+
+
+    for i in 0..block_count as usize {
+        let (mut k1, mut k2) = get_128_block(bytes, i * 2);
+
+        k1 = k1.wrapping_mul(c1);
+        k1 = k1.rotate_left(31);
+        k1 = k1.wrapping_mul(c2);
+        h1 ^= k1;
+
+        h1 = h1.rotate_left(27);
+        h1 = h1.wrapping_add(h2);
+        h1 = h1.wrapping_mul(5);
+        h1 = h1.wrapping_add(0x52dce729);
+
+        k2 = k2.wrapping_mul(c2);
+        k2 = k2.rotate_left(33);
+        k2 = k2.wrapping_mul(c1);
+        h2 ^= k2;
+
+        h2 = h2.rotate_left(31);
+        h2 = h2.wrapping_add(h1);
+        h2 = h2.wrapping_mul(5);
+        h2 = h2.wrapping_add(0x38495ab5);
+    }
+
+
+    let (mut k1, mut k2) = (0u64, 0u64);
+
+    if len & 15 == 15 { k2 ^= (bytes[(block_count * read_size) as usize + 14] as u64) << 48; }
+    if len & 15 >= 14 { k2 ^= (bytes[(block_count * read_size) as usize + 13] as u64) << 40; }
+    if len & 15 >= 13 { k2 ^= (bytes[(block_count * read_size) as usize + 12] as u64) << 32; }
+    if len & 15 >= 12 { k2 ^= (bytes[(block_count * read_size) as usize + 11] as u64) << 24; }
+    if len & 15 >= 11 { k2 ^= (bytes[(block_count * read_size) as usize + 10] as u64) << 16; }
+    if len & 15 >= 10 { k2 ^= (bytes[(block_count * read_size) as usize +  9] as u64) <<  8; }
+    if len & 15 >=  9 { k2 ^=  bytes[(block_count * read_size) as usize +  8] as u64;
+        k2 = k2.wrapping_mul(c2);
+        k2 = k2.rotate_left(33);
+        k2 = k2.wrapping_mul(c1);
+        h2 ^= k2;
+    }
+
+    if len & 15 >= 8 { k1 ^= (bytes[(block_count * read_size) as usize + 7] as u64) << 56; }
+    if len & 15 >= 7 { k1 ^= (bytes[(block_count * read_size) as usize + 6] as u64) << 48; }
+    if len & 15 >= 6 { k1 ^= (bytes[(block_count * read_size) as usize + 5] as u64) << 40; }
+    if len & 15 >= 5 { k1 ^= (bytes[(block_count * read_size) as usize + 4] as u64) << 32; }
+    if len & 15 >= 4 { k1 ^= (bytes[(block_count * read_size) as usize + 3] as u64) << 24; }
+    if len & 15 >= 3 { k1 ^= (bytes[(block_count * read_size) as usize + 2] as u64) << 16; }
+    if len & 15 >= 2 { k1 ^= (bytes[(block_count * read_size) as usize + 1] as u64) <<  8; }
+    if len & 15 >= 1 { k1 ^=  bytes[(block_count * read_size) as usize + 0] as u64;
+        k1 = k1.wrapping_mul(c1);
+        k1 = k1.rotate_left(31);
+        k1 = k1.wrapping_mul(c2);
+        h1 ^= k1;
+    }
+
+    h1 ^= bytes.len() as u64;
+    h2 ^= bytes.len() as u64;
+
+    h1 = h1.wrapping_add(h2);
+    h2 = h2.wrapping_add(h1);
+
+    h1 = fmix64(h1);
+    h2 = fmix64(h2);
+
+    h1 = h1.wrapping_add(h2);
+    h2 = h2.wrapping_add(h1);
+
+    return (h1, h2);
+}
+
+#[cfg(test)]
+mod test {
+    use super::murmurhash3_x64_128;
+
+    #[test]
+    fn test_empty_string() {
+        assert!(murmurhash3_x64_128("".as_bytes(), 0) == (0, 0));
+    }
+
+    #[test]
+    fn test_tail_lengths() {
+        assert!(murmurhash3_x64_128("1".as_bytes(), 0)
+            == (8213365047359667313, 10676604921780958775));
+        assert!(murmurhash3_x64_128("12".as_bytes(), 0)
+            == (5355690773644049813, 9855895140584599837));
+        assert!(murmurhash3_x64_128("123".as_bytes(), 0)
+            == (10978418110857903978, 4791445053355511657));
+        assert!(murmurhash3_x64_128("1234".as_bytes(), 0)
+            == (619023178690193332, 3755592904005385637));
+        assert!(murmurhash3_x64_128("12345".as_bytes(), 0)
+            == (2375712675693977547, 17382870096830835188));
+        assert!(murmurhash3_x64_128("123456".as_bytes(), 0)
+            == (16435832985690558678, 5882968373513761278));
+        assert!(murmurhash3_x64_128("1234567".as_bytes(), 0)
+            == (3232113351312417698, 4025181827808483669));
+        assert!(murmurhash3_x64_128("12345678".as_bytes(), 0)
+            == (4272337174398058908, 10464973996478965079));
+        assert!(murmurhash3_x64_128("123456789".as_bytes(), 0)
+            == (4360720697772133540, 11094893415607738629));
+        assert!(murmurhash3_x64_128("123456789a".as_bytes(), 0)
+            == (12594836289594257748, 2662019112679848245));
+        assert!(murmurhash3_x64_128("123456789ab".as_bytes(), 0)
+            == (6978636991469537545, 12243090730442643750));
+        assert!(murmurhash3_x64_128("123456789abc".as_bytes(), 0)
+            == (211890993682310078, 16480638721813329343));
+        assert!(murmurhash3_x64_128("123456789abcd".as_bytes(), 0)
+            == (12459781455342427559, 3193214493011213179));
+        assert!(murmurhash3_x64_128("123456789abcde".as_bytes(), 0)
+            == (12538342858731408721, 9820739847336455216));
+        assert!(murmurhash3_x64_128("123456789abcdef".as_bytes(), 0)
+            == (9165946068217512774, 2451472574052603025));
+        assert!(murmurhash3_x64_128("123456789abcdef1".as_bytes(), 0)
+            == (9259082041050667785, 12459473952842597282));
+    }
+
+    #[test]
+    fn test_large_data() {
+        assert!(murmurhash3_x64_128("Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam at consequat massa. Cras eleifend pellentesque ex, at dignissim libero maximus ut. Sed eget nulla felis".as_bytes(), 0)
+            == (9455322759164802692, 17863277201603478371));
+    }
+
+    #[cfg(feature="nightly")]
+    mod bench {
+        extern crate rand;
+        extern crate test;
+
+        use std::iter::FromIterator;
+        use self::rand::Rng;
+        use self::test::{Bencher, black_box};
+
+        use super::super::murmurhash3_x64_128;
+
+        fn run_bench(b: &mut Bencher, size: u64) {
+            let mut data: Vec<u8> = FromIterator::from_iter((0..size).map(|_| 0u8));
+            rand::thread_rng().fill_bytes(&mut data);
+
+            b.bytes = size;
+            b.iter(|| {
+                black_box(murmurhash3_x64_128(&data, 0));
+            });
+        }
+
+        #[bench]
+        fn bench_random_256k(b: &mut Bencher) {
+            run_bench(b, 256 * 1024);
+        }
+
+        #[bench]
+        fn bench_random_16b(b: &mut Bencher) {
+            run_bench(b, 16);
+        }
+
+    }
+}