From ef38a9a2606d0bec07bc8b36b38cab46fa165e79 Mon Sep 17 00:00:00 2001
From: Baptiste Wicht <baptiste.wicht@gmail.com>
Date: Tue, 24 Dec 2013 14:00:00 +0100
Subject: [PATCH] Search for an empty entry in the cluster

---
 kernel/src/console.cpp |  2 +-
 kernel/src/fat32.cpp   | 44 +++++++++++++++++++++++++++---------------
 2 files changed, 29 insertions(+), 17 deletions(-)

diff --git a/kernel/src/console.cpp b/kernel/src/console.cpp
index bd731c07..56f8915a 100644
--- a/kernel/src/console.cpp
+++ b/kernel/src/console.cpp
@@ -223,7 +223,7 @@ void k_printf(const char* fmt, ...){
 
             auto prev = current_column;
 
-            //Decimal
+            //Unsigned Decimal
             if(ch == 'd'){
                 auto arg = va_arg(va, uint64_t);
 
diff --git a/kernel/src/fat32.cpp b/kernel/src/fat32.cpp
index 9e11bc72..fa982042 100644
--- a/kernel/src/fat32.cpp
+++ b/kernel/src/fat32.cpp
@@ -277,22 +277,6 @@ std::pair<bool, uint32_t> find_cluster_number(fat32::dd disk, const std::vector<
     return std::make_pair(false, 0);
 }
 
-std::pair<bool, std::unique_heap_array<cluster_entry>> find_directory_cluster(fat32::dd disk, const std::vector<std::string>& path){
-    auto cluster_number = find_cluster_number(disk, path);
-
-    if(cluster_number.first){
-        std::unique_heap_array<cluster_entry> cluster(16 * fat_bs->sectors_per_cluster);
-
-        if(read_sectors(disk, cluster_lba(cluster_number.second), fat_bs->sectors_per_cluster, cluster.get())){
-            return std::make_pair(true, std::move(cluster));
-        } else {
-            return std::make_pair(false, std::unique_heap_array<cluster_entry>());
-        }
-    }
-
-    return std::make_pair(false, std::unique_heap_array<cluster_entry>());
-}
-
 std::vector<disks::file> files(fat32::dd disk, const std::vector<std::string>& path){
     auto cluster_number_search = find_cluster_number(disk, path);
     if(!cluster_number_search.first){
@@ -462,5 +446,33 @@ bool fat32::mkdir(dd disk, const disks::partition_descriptor& partition, const s
         return false;
     }
 
+    auto cluster_number = find_cluster_number(disk, path);
+    if(!cluster_number.first){
+        return false;
+    }
+
+    std::unique_heap_array<cluster_entry> directory_cluster(16 * fat_bs->sectors_per_cluster);
+
+    if(read_sectors(disk, cluster_lba(cluster_number.second), fat_bs->sectors_per_cluster, directory_cluster.get())){
+        auto end = -1;
+        auto free = -1;
+        for(size_t i = 0; i < directory_cluster.size(); ++i){
+            auto& entry = directory_cluster[i];
+
+            if(end_of_directory(entry)){
+                end = i;
+                continue;
+            }
+
+            if(!entry_used(entry)){
+                free = i;
+                break;
+            }
+        }
+
+        k_printf("end=%d\n", end);
+        k_printf("free=%d\n", free);
+    }
+
     return false;
 }