commit f4aaa2a3d5015998751e1f73f9ba8d5545421808
Author: Jessie <me@jessiep.me>
Date:   Sun Aug 27 20:12:47 2023 -0400

    init

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..4fffb2f
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/target
+/Cargo.lock
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..06806c4
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,15 @@
+[package]
+name = "prochash"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[lib]
+proc-macro = true
+
+[dependencies]
+quote = "1"
+proc-macro2 = "1.0"
+syn = { version = "2.0.28", features = ["full"] }
+k12 = "0.3.0"
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diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..3227bb0
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,84 @@
+use syn::{parse_macro_input, Expr, Lit};
+use proc_macro::{TokenStream};
+use proc_macro2::Literal;
+use k12::{digest:: *};
+use quote::ToTokens;
+
+
+fn _hash<F: Fn(u64)->TokenStream>(input: TokenStream, conversion_func: F) -> TokenStream {
+    let expr = parse_macro_input!(input as Expr);
+
+    let string = match &expr {
+        Expr::Lit(literal) => {
+            match &literal.lit {
+                Lit::Str(s) => {Some(s.value())}
+                _ => {None}
+            }
+        }
+        _ => { None }
+    };
+
+    let string = string.unwrap_or_else(|| expr.to_token_stream().to_string());
+
+    let mut hasher = k12::KangarooTwelve::default();
+    hasher.update(string.as_bytes());
+    let bytes = hasher.finalize_boxed(8);
+    let u64 = {
+        let mut b = [0u8;8];
+        b.copy_from_slice(bytes.as_ref());
+        u64::from_le_bytes(b)
+    };
+    conversion_func(u64)
+}
+
+
+#[proc_macro]
+pub fn u64(input: TokenStream) -> TokenStream {
+    _hash(input, |value| {
+        Literal::u64_suffixed(value).to_token_stream().into()
+    })
+}
+
+#[proc_macro]
+pub fn u64s(input: TokenStream) -> TokenStream {
+    _hash(input, |value| {
+        let value = format!("{:016X}", value);
+        Literal::string(&value).to_token_stream().into()
+    })
+}
+
+#[proc_macro]
+pub fn u32(input: TokenStream) -> TokenStream {
+    _hash(input, |value| {
+        let value = (value as u32) ^ (value >> 32) as u32;
+        Literal::u32_suffixed(value).to_token_stream().into()
+    })
+}
+
+#[proc_macro]
+pub fn u32s(input: TokenStream) -> TokenStream {
+    _hash(input, |value| {
+        let value = (value as u32) ^ (value >> 32) as u32;
+        let value = format!("{:08X}", value);
+        Literal::string(&value).to_token_stream().into()
+    })
+}
+
+#[proc_macro]
+pub fn u16(input: TokenStream) -> TokenStream {
+    _hash(input, |value| {
+        let value = (value as u32) ^ (value >> 32) as u32;
+        let value = value as u16 ^ (value >> 16) as u16;
+        Literal::u16_suffixed(value).to_token_stream().into()
+    })
+}
+
+#[proc_macro]
+pub fn u16s(input: TokenStream) -> TokenStream {
+    _hash(input, |value| {
+        let value = (value as u32) ^ (value >> 32) as u32;
+        let value = value as u16 ^ (value >> 16) as u16;
+        let value = format!("{:04X}", value);
+        Literal::string(&value).to_token_stream().into()
+    })
+}
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diff --git a/tests/test.rs b/tests/test.rs
new file mode 100644
index 0000000..91d4542
--- /dev/null
+++ b/tests/test.rs
@@ -0,0 +1,6 @@
+
+#[test]
+pub fn test() {
+    let a = prochash::u32s!("Hello Hash!");
+    println!("a: {a}");
+}
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