v0.0.0b

sub/core/src/fnv1.rs

@@ -0,0 +1,76 @@
+const INITIAL_STATE: u64 = 0xcbf29ce484222325;
+const PRIME: u64 = 0x100000001b3;
+
+//noinspection DuplicatedCode
+pub const fn hash(bytes: &[u8]) -> u64 {
+    let mut hash = INITIAL_STATE;
+    let mut i = 0;
+    while i < bytes.len() {
+        hash = hash ^ bytes[i] as u64;
+        hash = hash.wrapping_mul(PRIME);
+        i += 1;
+    }
+    hash
+}
+
+//noinspection DuplicatedCode
+pub const fn hash32(bytes: &[u32]) -> u64 {
+    let mut hash = INITIAL_STATE;
+    let mut i = 0;
+    while i < bytes.len() {
+        hash = hash ^ bytes[i] as u64;
+        hash = hash.wrapping_mul(PRIME);
+        i += 1;
+    }
+    hash
+}
+
+//noinspection DuplicatedCode
+#[inline(always)]
+pub const fn hash64(bytes: &[u64]) -> u64 {
+    let mut hash = INITIAL_STATE;
+    let mut i = 0;
+    while i < bytes.len() {
+        hash = hash ^ bytes[i];
+        hash = hash.wrapping_mul(PRIME);
+        i += 1;
+    }
+    hash
+}
+
+//noinspection DuplicatedCode
+#[inline(always)]
+pub const fn hash_utf8(bytes: &[u8]) -> u64 {
+    let mut hash = INITIAL_STATE;
+    let mut i = 0;
+    while i < bytes.len() {
+
+        let char = match bytes[i] {
+            0x40..=0x5A => bytes[i] + 0x20,
+            _ => bytes[i],
+        } as u64;
+
+        hash = hash ^ (char);
+        hash = hash.wrapping_mul(PRIME);
+        i += 1;
+    }
+    hash
+}
+
+//noinspection DuplicatedCode
+pub const fn hash_utf16(bytes: &[u16]) -> u64 {
+    let mut hash = INITIAL_STATE;
+    let mut i = 0;
+    while i < bytes.len() {
+
+        let char = match bytes[i] {
+            0x40..=0x5A => bytes[i] + 0x20,
+            _ => bytes[i],
+        } as u64;
+
+        hash = hash ^ (char);
+        hash = hash.wrapping_mul(PRIME);
+        i += 1;
+    }
+    hash
+}