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Search for an empty entry in the cluster

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This commit is contained in:
Baptiste Wicht 2013-12-24 14:00:00 +01:00
parent ce86d48d6b
commit ef38a9a260
2 changed files with 29 additions and 17 deletions
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2
kernel/src/console.cpp
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@ -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);

44
kernel/src/fat32.cpp
View File

@ -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;
}