From 7199e74aa22e592a3b77bdd81f735edca5470596 Mon Sep 17 00:00:00 2001
From: Benji Dial <benji@benjidial.net>
Date: Sat, 20 Jan 2024 17:59:40 -0500
Subject: update

---
 kernel/storage/fs/tarfs.cpp | 102 +++++++++++++++++++-------------------------
 1 file changed, 43 insertions(+), 59 deletions(-)

(limited to 'kernel/storage/fs/tarfs.cpp')

diff --git a/kernel/storage/fs/tarfs.cpp b/kernel/storage/fs/tarfs.cpp
index fb1eff8..5986f62 100644
--- a/kernel/storage/fs/tarfs.cpp
+++ b/kernel/storage/fs/tarfs.cpp
@@ -5,27 +5,25 @@
 
 namespace hilbert::kernel::storage::fs {
 
-#define BD_TO_FS(expr) \
-  { \
-    bd_result _result = expr; \
-    if (_result == bd_result::out_of_bounds) \
-      return fs_result::fs_corrupt; \
-    if (_result == bd_result::device_error) \
-      return fs_result::device_error; \
-  }
+  #define BD_TO_FS(expr) \
+    { \
+      bd_result _result = expr; \
+      if (_result == bd_result::out_of_bounds) \
+        return fs_result::fs_corrupt; \
+      if (_result == bd_result::device_error) \
+        return fs_result::device_error; \
+    }
 
-#define FS_TO_FS(expr) \
-  { \
-    fs_result _result = expr; \
-    if (_result != fs_result::success) \
-      return _result; \
-  }
+  #define FS_TO_FS(expr) \
+    { \
+      fs_result _result = expr; \
+      if (_result != fs_result::success) \
+        return _result; \
+    }
 
   tarfs_instance::tarfs_instance(block_device *bd) : bd(bd) {}
 
-  fs_result tarfs_instance::next_node(
-    node_id_t node, std::optional<node_id_t> &out
-  ) {
+  fs_result tarfs_instance::next_node(node_id_t node, node_id_t &out) {
 
     uint64_t bytes;
     FS_TO_FS(read_num(node + 124, 12, bytes))
@@ -37,8 +35,7 @@ namespace hilbert::kernel::storage::fs {
       if (sector[i] != 0)
         return fs_result::success;
 
-    out = {};
-    return fs_result::success;
+    return fs_result::does_not_exist;
 
   }
 
@@ -84,7 +81,7 @@ namespace hilbert::kernel::storage::fs {
   }
 
   fs_result tarfs_instance::first_child_starting_at(
-    node_id_t parent, node_id_t start, std::optional<node_id_t> &out
+    node_id_t parent, node_id_t start, node_id_t &out
   ) {
 
     utility::string parent_full_name;
@@ -93,9 +90,9 @@ namespace hilbert::kernel::storage::fs {
     utility::string child_full_name;
     out = start;
 
-    do {
+    while (true) {
 
-      FS_TO_FS(read_full_name(*out, child_full_name))
+      FS_TO_FS(read_full_name(out, child_full_name))
 
       if (child_full_name.count > parent_full_name.count &&
           child_full_name.starts_with(parent_full_name)
@@ -110,11 +107,9 @@ namespace hilbert::kernel::storage::fs {
       }
 
     next:
-      next_node(*out, out);
+      FS_TO_FS(next_node(out, out))
 
-    } while (out);
-
-    return fs_result::success;
+    }
 
   }
 
@@ -171,7 +166,7 @@ namespace hilbert::kernel::storage::fs {
       BD_TO_FS(bd->read_bytes(node + 157, 100, target.buffer))
       while (target.count < 100 && target.buffer[target.count] != '\0')
         ++target.count;
-      entry.target = std::move(target);
+      entry.target = utility::move(target);
     }
 
     return fs_result::success;
@@ -181,64 +176,53 @@ namespace hilbert::kernel::storage::fs {
   fs_result tarfs_instance::get_root_node(node_id_t &out) {
 
     utility::string full_name;
-    std::optional<node_id_t> on = 0;
+    node_id_t on = 0;
 
-    do {
+    while (true) {
 
-      FS_TO_FS(read_full_name(*on, full_name))
+      FS_TO_FS(read_full_name(on, full_name))
       if (full_name.count == 2) {
-        out = *on;
+        out = on;
         return fs_result::success;
       }
-      next_node(*on, on);
-
-    } while (on);
+      fs_result result = next_node(on, on);
+      if (result == fs_result::does_not_exist)
+        return fs_result::fs_corrupt;
+      FS_TO_FS(result)
 
-    return fs_result::fs_corrupt;
+    }
 
   }
 
   fs_result tarfs_instance::get_first_child(
-    node_id_t node, std::optional<dir_entry> &out, directory_iter_t &iter_out
+    node_id_t node, dir_entry &out, directory_iter_t &iter_out
   ) {
 
-    std::optional<node_id_t> child;
+    node_id_t child;
     FS_TO_FS(first_child_starting_at(node, 0, child))
-    if (!child) {
-      out = {};
-      return fs_result::success;
-    }
 
     dir_entry entry;
-    FS_TO_FS(get_dir_entry(*child, entry))
-    out = std::move(entry);
-    iter_out = (directory_iter_t)*child;
+    FS_TO_FS(get_dir_entry(child, entry))
+    out = utility::move(entry);
+    iter_out = (directory_iter_t)child;
     return fs_result::success;
 
   }
 
   fs_result tarfs_instance::get_next_child(
-    node_id_t node, std::optional<dir_entry> &out, directory_iter_t &iter
+    node_id_t node, dir_entry &out, directory_iter_t &iter
   ) {
 
-    std::optional<node_id_t> start;
+    node_id_t start;
     FS_TO_FS(next_node((node_id_t)iter, start))
-    if (!start) {
-      out = {};
-      return fs_result::success;
-    }
 
-    std::optional<node_id_t> child;
-    FS_TO_FS(first_child_starting_at(node, *start, child))
-    if (!child) {
-      out = {};
-      return fs_result::success;
-    }
+    node_id_t child;
+    FS_TO_FS(first_child_starting_at(node, start, child))
 
     dir_entry entry;
-    FS_TO_FS(get_dir_entry(*child, entry))
-    out = std::move(entry);
-    iter = (directory_iter_t)*child;
+    FS_TO_FS(get_dir_entry(child, entry))
+    out = utility::move(entry);
+    iter = (directory_iter_t)child;
     return fs_result::success;
 
   }
-- 
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