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Cleanup

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This commit is contained in:
Baptiste Wicht 2014-03-01 17:15:50 +01:00
parent ad54b410dd
commit 37ce272352
2 changed files with 797 additions and 785 deletions
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50
kernel/include/fat32.hpp
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@ -10,6 +10,7 @@
#include <vector.hpp>
#include <string.hpp>
#include <pair.hpp>
#include "disks.hpp"
#include "file_system.hpp"
@ -62,6 +63,37 @@ struct fat_is_t {
static_assert(sizeof(fat_bs_t) == 512, "FAT Boot Sector is exactly one disk sector");
//An entry in the directory cluster
struct cluster_entry {
char name[11];
uint8_t attrib;
uint8_t reserved;
uint8_t creation_time_seconds;
uint16_t creation_time;
uint16_t creation_date;
uint16_t accessed_date;
uint16_t cluster_high;
uint16_t modification_time;
uint16_t modification_date;
uint16_t cluster_low;
uint32_t file_size;
} __attribute__ ((packed));
//A long file name text entry in the directory cluster
struct long_entry {
uint8_t sequence_number;
uint16_t name_first[5];
uint8_t attrib;
uint8_t reserved;
uint8_t alias_checksum;
uint16_t name_second[6];
uint16_t starting_cluster;
uint16_t name_third[2];
} __attribute__ ((packed));
static_assert(sizeof(cluster_entry) == 32, "A cluster entry is 32 bytes");
static_assert(sizeof(long_entry) == 32, "A cluster entry is 32 bytes");
typedef const disks::disk_descriptor& dd;
struct fat32_file_system : vfs::file_system {
@ -82,6 +114,24 @@ public:
size_t touch(const std::vector<std::string>& file_path);
size_t mkdir(const std::vector<std::string>& file_path);
size_t rm(const std::vector<std::string>& file_path);
private:
size_t rm_dir(uint32_t parent_cluster_number, size_t position, uint32_t cluster_number);
size_t rm_file(uint32_t parent_cluster_number, size_t position, uint32_t cluster_number);
cluster_entry* find_free_entry(std::unique_heap_array<cluster_entry>& directory_cluster, size_t entries, uint32_t& cluster_number);
cluster_entry* extend_directory(std::unique_heap_array<cluster_entry>& directory_cluster, size_t entries, uint32_t& cluster_number);
std::vector<vfs::file> files(const std::vector<std::string>& path, size_t last = 0);
std::pair<bool, uint32_t> find_cluster_number(const std::vector<std::string>& path, size_t last = 0);
std::vector<vfs::file> files(uint32_t cluster_number);
bool write_is();
uint64_t cluster_lba(uint64_t cluster);
uint32_t read_fat_value(uint32_t cluster);
bool write_fat_value(uint32_t cluster, uint32_t value);
uint32_t next_cluster(uint32_t cluster);
uint32_t find_free_cluster();
};
uint64_t free_size(dd disk, const disks::partition_descriptor& partition);

1520
kernel/src/fat32.cpp
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