mirror of
https://github.com/wiidev/usbloadergx.git
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64f8406b07
*updated libntfs (write fix) *updated libfat *lots of changes in the startup code, removed almost everything. This might cause problems for some drives at loading the gamelist and needs to be adjusted later but better this time. more cleanup is needed in main.cpp and will come. *using libogc sd/usb for config loading and reload to cIOS afterwards *added missing boothomebrew stuff pune forgot NOTE: From now on we will be doing a lot of revs which we won't be compiling and releasing. This revs are officially not available for public so don't making issues regarding those revs. Those will be closed right away. We need first to cleanup a lot of crap and update loader to new standards before releasing stuff again.
179 lines
6.1 KiB
C
179 lines
6.1 KiB
C
/*
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directory.h
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Reading, writing and manipulation of the directory structure on
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a FAT partition
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Copyright (c) 2006 Michael "Chishm" Chisholm
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation and/or
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other materials provided with the distribution.
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3. The name of the author may not be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _DIRECTORY_H
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#define _DIRECTORY_H
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#include <sys/stat.h>
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#include "common.h"
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#include "partition.h"
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#define DIR_ENTRY_DATA_SIZE 0x20
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#define MAX_LFN_LENGTH 256
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#define MAX_FILENAME_LENGTH 768 // 256 UCS-2 characters encoded into UTF-8 can use up to 768 UTF-8 chars
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#define MAX_ALIAS_LENGTH 13
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#define LFN_ENTRY_LENGTH 13
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#define ALIAS_ENTRY_LENGTH 11
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#define MAX_ALIAS_EXT_LENGTH 3
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#define MAX_ALIAS_PRI_LENGTH 8
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#define MAX_NUMERIC_TAIL 999999
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#define FAT16_ROOT_DIR_CLUSTER 0
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#define DIR_SEPARATOR '/'
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// File attributes
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#define ATTRIB_ARCH 0x20 // Archive
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#define ATTRIB_DIR 0x10 // Directory
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#define ATTRIB_LFN 0x0F // Long file name
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#define ATTRIB_VOL 0x08 // Volume
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#define ATTRIB_SYS 0x04 // System
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#define ATTRIB_HID 0x02 // Hidden
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#define ATTRIB_RO 0x01 // Read only
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typedef enum {FT_DIRECTORY, FT_FILE} FILE_TYPE;
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typedef struct {
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uint32_t cluster;
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sec_t sector;
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int32_t offset;
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} DIR_ENTRY_POSITION;
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typedef struct {
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uint8_t entryData[DIR_ENTRY_DATA_SIZE];
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DIR_ENTRY_POSITION dataStart; // Points to the start of the LFN entries of a file, or the alias for no LFN
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DIR_ENTRY_POSITION dataEnd; // Always points to the file/directory's alias entry
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char filename[MAX_FILENAME_LENGTH];
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} DIR_ENTRY;
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// Directory entry offsets
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enum DIR_ENTRY_offset {
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DIR_ENTRY_name = 0x00,
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DIR_ENTRY_extension = 0x08,
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DIR_ENTRY_attributes = 0x0B,
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DIR_ENTRY_reserved = 0x0C,
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DIR_ENTRY_cTime_ms = 0x0D,
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DIR_ENTRY_cTime = 0x0E,
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DIR_ENTRY_cDate = 0x10,
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DIR_ENTRY_aDate = 0x12,
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DIR_ENTRY_clusterHigh = 0x14,
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DIR_ENTRY_mTime = 0x16,
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DIR_ENTRY_mDate = 0x18,
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DIR_ENTRY_cluster = 0x1A,
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DIR_ENTRY_fileSize = 0x1C
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};
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/*
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Returns true if the file specified by entry is a directory
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*/
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static inline bool _FAT_directory_isDirectory (DIR_ENTRY* entry) {
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return ((entry->entryData[DIR_ENTRY_attributes] & ATTRIB_DIR) != 0);
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}
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static inline bool _FAT_directory_isWritable (DIR_ENTRY* entry) {
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return ((entry->entryData[DIR_ENTRY_attributes] & ATTRIB_RO) == 0);
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}
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static inline bool _FAT_directory_isDot (DIR_ENTRY* entry) {
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return ((entry->filename[0] == '.') && ((entry->filename[1] == '\0') ||
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((entry->filename[1] == '.') && entry->filename[2] == '\0')));
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}
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/*
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Reads the first directory entry from the directory starting at dirCluster
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Places result in entry
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entry will be destroyed even if no directory entry is found
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Returns true on success, false on failure
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*/
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bool _FAT_directory_getFirstEntry (PARTITION* partition, DIR_ENTRY* entry, uint32_t dirCluster);
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/*
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Reads the next directory entry after the one already pointed to by entry
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Places result in entry
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entry will be destroyed even if no directory entry is found
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Returns true on success, false on failure
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*/
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bool _FAT_directory_getNextEntry (PARTITION* partition, DIR_ENTRY* entry);
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/*
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Gets the directory entry corrsponding to the supplied path
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entry will be destroyed even if no directory entry is found
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pathEnd specifies the end of the path string, for cutting strings short if needed
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specify NULL to use the full length of path
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pathEnd is only a suggestion, and the path string will be searched up until the next PATH_SEPARATOR
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after pathEND.
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Returns true on success, false on failure
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*/
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bool _FAT_directory_entryFromPath (PARTITION* partition, DIR_ENTRY* entry, const char* path, const char* pathEnd);
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/*
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Changes the current directory to the one specified by path
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Returns true on success, false on failure
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*/
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bool _FAT_directory_chdir (PARTITION* partition, const char* path);
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/*
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Removes the directory entry specified by entry
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Assumes that entry is valid
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Returns true on success, false on failure
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*/
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bool _FAT_directory_removeEntry (PARTITION* partition, DIR_ENTRY* entry);
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/*
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Add a directory entry to the directory specified by dirCluster
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The fileData, dataStart and dataEnd elements of the DIR_ENTRY struct are
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updated with the new directory entry position and alias.
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Returns true on success, false on failure
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*/
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bool _FAT_directory_addEntry (PARTITION* partition, DIR_ENTRY* entry, uint32_t dirCluster);
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/*
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Get the start cluster of a file from it's entry data
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*/
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uint32_t _FAT_directory_entryGetCluster (PARTITION* partition, const uint8_t* entryData);
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/*
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Fill in the file name and entry data of DIR_ENTRY* entry.
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Assumes that the entry's dataStart and dataEnd are correct
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Returns true on success, false on failure
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*/
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bool _FAT_directory_entryFromPosition (PARTITION* partition, DIR_ENTRY* entry);
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/*
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Fill in a stat struct based on a file entry
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*/
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void _FAT_directory_entryStat (PARTITION* partition, DIR_ENTRY* entry, struct stat *st);
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/*
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Get volume label
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*/
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bool _FAT_directory_getVolumeLabel (PARTITION* partition, char *label);
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#endif // _DIRECTORY_H
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