From 7af0771f9a3031acc36a6990d07bdb92a61c0c75 Mon Sep 17 00:00:00 2001
From: Chuyan Zhang <me@zcy.moe>
Date: Wed, 29 Nov 2023 03:29:34 -0800
Subject: symlink, probably not working

---
 src/disk/block.rs | 63 +++++++++++++++++++++++++++++++++++++++++++------------
 1 file changed, 50 insertions(+), 13 deletions(-)

(limited to 'src/disk/block.rs')

diff --git a/src/disk/block.rs b/src/disk/block.rs
index 26a7ec5..73819e2 100644
--- a/src/disk/block.rs
+++ b/src/disk/block.rs
@@ -19,7 +19,7 @@ impl Block for DataBlock {}
 #[repr(C)]
 #[derive(Clone)]
 pub struct InodeBlock {
-    pub(crate) inodes: [Inode; 16],
+    pub(crate) inodes: [Inode; 32],
 }
 
 impl Default for InodeBlock {
@@ -42,6 +42,22 @@ impl Default for InodeBlock {
                 Inode::empty(),
                 Inode::empty(),
                 Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
+                Inode::empty(),
             ],
         }
     }
@@ -49,8 +65,6 @@ impl Default for InodeBlock {
 
 impl Block for InodeBlock {}
 
-const FULL_MAP: u16 = 0b111_111_111_111_111;
-
 #[repr(C)]
 #[derive(Clone)]
 pub struct DirectoryEntry {
@@ -115,6 +129,7 @@ impl Default for DirectoryBlock {
 }
 
 impl DirectoryBlock {
+    #[allow(unused)]
     pub(crate) fn is_full(&self) -> bool {
         self.occupancy[0] == 0xFF && self.occupancy[1] == 0xFF
     }
@@ -133,20 +148,42 @@ impl DirectoryBlock {
         }
     }
 
-    pub(crate) fn allocate(&mut self) -> Option<usize> {
-        if self.occupancy[0] != 0xFF {
-            let leading_ones = self.occupancy[0].leading_ones();
-            self.occupancy[0] |= (1 << (7 - leading_ones)) as u8;
-            Some(leading_ones as usize)
-        } else if self.occupancy[1] != 0xFF {
-            let leading_ones = self.occupancy[1].leading_ones();
-            self.occupancy[1] |= (1 << (7 - leading_ones)) as u8;
-            Some(7 + leading_ones as usize)
+    pub(crate) fn allocate(&mut self, mut index: usize) -> bool {
+        if index < 7 {
+            index = index + 1;
+            let mask = (1 << (7 - index)) as u8;
+            if self.occupancy[0] & mask != 0 {
+                false
+            } else {
+                self.occupancy[0] |= mask;
+                true
+            }
         } else {
-            None
+            index = index - 7;
+            let mask = (1 << (7 - index)) as u8;
+            if self.occupancy[1] & mask != 0 {
+                false
+            } else {
+                self.occupancy[1] |= mask;
+                true
+            }
         }
     }
 
+    // pub(crate) fn allocate(&mut self) -> Option<usize> {
+    //     if self.occupancy[0] != 0xFF {
+    //         let leading_ones = self.occupancy[0].leading_ones();
+    //         self.occupancy[0] |= (1 << (7 - leading_ones)) as u8;
+    //         Some(leading_ones as usize)
+    //     } else if self.occupancy[1] != 0xFF {
+    //         let leading_ones = self.occupancy[1].leading_ones();
+    //         self.occupancy[1] |= (1 << (7 - leading_ones)) as u8;
+    //         Some(7 + leading_ones as usize)
+    //     } else {
+    //         None
+    //     }
+    // }
+
     pub(crate) fn deallocate(&mut self, mut index: usize) {
         if index < 7 {
             index = index + 1;
-- 
cgit v1.2.3-70-g09d2