From f4a9ddf8dc5a976e3179692b3b0a179702050512 Mon Sep 17 00:00:00 2001
From: cbax <me+forgejo@cbax.dev>
Date: Tue, 24 Sep 2024 20:19:24 -0400
Subject: [PATCH] getting there

---
 Cargo.lock |   7 ++++
 README.md  |   4 +--
 src/lib.rs | 100 ++++++++++++++++++++++++++++++++++++++++++++++++++---
 3 files changed, 104 insertions(+), 7 deletions(-)
 create mode 100644 Cargo.lock

diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..71d70e1
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "icechip"
+version = "0.1.0"
diff --git a/README.md b/README.md
index 5550c4a..236f470 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@ Adheres to the twitter specification, but also has an improved mode.
 ## Twitter Specification
 | u64 or i64 | | | |
 |:-:|:-:|:-:|:-:|
-| bits 0-40 | bits 41-51 | bits 51-62 | 63 |
+| bits 0-40 | bits 41-51 | bits 52-62 | 63 |
 | time since an epoch in ms | machine id | sequence number | sign |
 
 ## Enhanced Specification
@@ -16,7 +16,7 @@ Utilizes a 64 bit unsigned integer, moves the now spare sign bit and one sequenc
 
 | u64 |||
 |:-:|:-:|:-:|
-| 0-40 | 41-52 | 53-63 |
+| 0-40 | 41-53 | 54-63 |
 | time since an epoch in ms | machine id | sequence number |
 
 ## Extended Enhanced Specification
diff --git a/src/lib.rs b/src/lib.rs
index b93cf3f..056d76e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,89 @@
-pub fn add(left: u64, right: u64) -> u64 {
-    left + right
+#[derive(Debug)]
+pub enum Version {
+    ENHANCED,
+    EXTENDED
+}
+
+#[derive(Debug)]
+pub struct Icechip<T> {
+    version: Version,
+    timestamp: T,
+    machine_id: T,
+    sequence_id: T,
+    epoch: Option<u64>
+}
+
+impl Into<u64> for Icechip<u64> {
+    fn into(self) -> u64 {
+        let mut ret: u64 = self.timestamp.checked_shl(23).unwrap();
+        ret = ret + self.machine_id.checked_shl(12).unwrap();
+        ret = ret + self.sequence_id;
+        return ret;
+    }
+}
+
+impl From<u64> for Icechip<u64> {
+    fn from (value: u64) -> Icechip<u64> {
+        return Icechip {
+            version: Version::ENHANCED,
+            timestamp: value.checked_shr(23).unwrap(),
+            machine_id: value.checked_shl(41).unwrap().checked_shr(53).unwrap(),
+            sequence_id: value.checked_shl(52).unwrap().checked_shr(52).unwrap(),
+            epoch: None
+        };
+    }
+}
+
+impl Into<u128> for Icechip<u128> {
+    fn into(self) -> u128 {
+        let mut ret: u128 = self.timestamp.checked_shl(64).unwrap();
+        ret = ret + self.machine_id.checked_shl(32).unwrap();
+        ret = ret + self.sequence_id;
+        return ret;
+    }
+}
+
+impl From<u128> for Icechip<u128> {
+    fn from(value: u128) -> Icechip<u128> {
+        return Icechip {
+            version: Version::EXTENDED,
+            timestamp: value.checked_shr(64).unwrap(),
+            machine_id: value.checked_shr(32).unwrap().checked_shl(64).unwrap().checked_shr(64).unwrap(),
+            sequence_id: value.checked_shl(96).unwrap().checked_shr(96).unwrap(),
+            epoch: None
+        };
+    }
+}
+
+impl<T> Icechip<T> {
+    pub fn new(version: Version, epoch: Option<u64>) -> Icechip<T> {
+        todo!();
+    }
+
+    // the offset will get subtracted from the unix epoch before being used in the Icechip.
+    pub fn set_epoch_offset(mut self, offset: u64) {
+        self.epoch = Some(offset);
+    }
+
+    pub fn tick(&self) -> Icechip<T> {
+        /*
+            - if current timestamp in relation to self does not equal self, return an updated value, else increment the sequence
+            - if sequence is going to overflow, sleep 1 ms
+        */
+        todo!();
+    }
+    
+    pub fn with_id(machine_id: u32, version: Version) -> Icechip<T> {
+        todo!();
+        /*match version {
+            Version::ENHANCED => {
+                
+            },
+            Version::EXTENDED => {
+                
+            }
+        }*/
+    }  
 }
 
 #[cfg(test)]
@@ -7,8 +91,14 @@ mod tests {
     use super::*;
 
     #[test]
-    fn it_works() {
-        let result = add(2, 2);
-        assert_eq!(result, 4);
+    fn from_into_u128() {
+        let test_chip = Icechip::from(0x0123456789ABCDEFu128);
+        assert_eq!(0x0123456789ABCDEFu128, test_chip.into());
+    }
+
+    #[test]
+    fn from_into_u64() {
+        let test_chip = Icechip::from(0x0123456789ABCDEFu64);
+        assert_eq!(0x0123456789ABCDEFu64, test_chip.into());
     }
 }