diff options
Diffstat (limited to 'c/src/lib/libbsp/arm/nds/libfat/source/fatdir.c')
| -rw-r--r-- | c/src/lib/libbsp/arm/nds/libfat/source/fatdir.c | 536 |
1 files changed, 0 insertions, 536 deletions
diff --git a/c/src/lib/libbsp/arm/nds/libfat/source/fatdir.c b/c/src/lib/libbsp/arm/nds/libfat/source/fatdir.c deleted file mode 100644 index 78a2b14f9e..0000000000 --- a/c/src/lib/libbsp/arm/nds/libfat/source/fatdir.c +++ /dev/null @@ -1,536 +0,0 @@ -/* - fatdir.c - - Functions used by the newlib disc stubs to interface with - this library - - Copyright (c) 2006 Michael "Chishm" Chisholm - - Redistribution and use in source and binary forms, with or without modification, - are permitted provided that the following conditions are met: - - 1. Redistributions of source code must retain the above copyright notice, - this list of conditions and the following disclaimer. - 2. Redistributions in binary form must reproduce the above copyright notice, - this list of conditions and the following disclaimer in the documentation and/or - other materials provided with the distribution. - 3. The name of the author may not be used to endorse or promote products derived - from this software without specific prior written permission. - - THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED - WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY - AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE - LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; - LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, - EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - - 2006-08-13 - Chishm - * Moved all externally visible directory related functions to fatdir - * Added _FAT_mkdir_r - - 2006-08-14 - Chishm - * Added directory iterator functions - - 2006-08-19 - Chishm - * Updated dirnext return values to return correctly - - 2006-10-01 - Chishm - * Now clears the whole cluster when creating a new directory, bug found by Hermes - - 2007-01-10 - Chishm - * Updated directory iterator functions for DevkitPro r20 -*/ - -#include <string.h> -#include <errno.h> -#include <ctype.h> -#include <unistd.h> -#include <sys/dir.h> - -#include "fatdir.h" - -#include "cache.h" -#include "file_allocation_table.h" -#include "partition.h" -#include "directory.h" -#include "bit_ops.h" -#include "filetime.h" - - -int _FAT_stat_r (struct _reent *r, const char *path, struct stat *st) { - PARTITION* partition = NULL; - - DIR_ENTRY dirEntry; - - // Get the partition this file is on - partition = _FAT_partition_getPartitionFromPath (path); - - if (partition == NULL) { - r->_errno = ENODEV; - return -1; - } - - // Move the path pointer to the start of the actual path - if (strchr (path, ':') != NULL) { - path = strchr (path, ':') + 1; - } - if (strchr (path, ':') != NULL) { - r->_errno = EINVAL; - return -1; - } - - // Search for the file on the disc - if (!_FAT_directory_entryFromPath (partition, &dirEntry, path, NULL)) { - r->_errno = ENOENT; - return -1; - } - - // Fill in the stat struct - _FAT_directory_entryStat (partition, &dirEntry, st); - - return 0; -} - -int _FAT_link_r (struct _reent *r, const char *existing, const char *newLink) { - r->_errno = ENOTSUP; - return -1; -} - -int _FAT_unlink_r (struct _reent *r, const char *path) { - PARTITION* partition = NULL; - DIR_ENTRY dirEntry; - DIR_ENTRY dirContents; - u32 cluster; - bool nextEntry; - bool errorOccured = false; - - // Get the partition this directory is on - partition = _FAT_partition_getPartitionFromPath (path); - - if (partition == NULL) { - r->_errno = ENODEV; - return -1; - } - - // Make sure we aren't trying to write to a read-only disc - if (partition->readOnly) { - r->_errno = EROFS; - return -1; - } - - // Move the path pointer to the start of the actual path - if (strchr (path, ':') != NULL) { - path = strchr (path, ':') + 1; - } - if (strchr (path, ':') != NULL) { - r->_errno = EINVAL; - return -1; - } - - // Search for the file on the disc - if (!_FAT_directory_entryFromPath (partition, &dirEntry, path, NULL)) { - r->_errno = ENOENT; - return -1; - } - - cluster = _FAT_directory_entryGetCluster (dirEntry.entryData); - - - // If this is a directory, make sure it is empty - if (_FAT_directory_isDirectory (&dirEntry)) { - nextEntry = _FAT_directory_getFirstEntry (partition, &dirContents, cluster); - - while (nextEntry) { - if (!_FAT_directory_isDot (&dirContents)) { - // The directory had something in it that isn't a reference to itself or it's parent - r->_errno = EPERM; - return -1; - } - nextEntry = _FAT_directory_getNextEntry (partition, &dirContents); - } - } - - if (cluster != CLUSTER_FREE) { - // Remove the cluster chain for this file - if (!_FAT_fat_clearLinks (partition, cluster)) { - r->_errno = EIO; - errorOccured = true; - } - } - - // Remove the directory entry for this file - if (!_FAT_directory_removeEntry (partition, &dirEntry)) { - r->_errno = EIO; - errorOccured = true; - } - - // Flush any sectors in the disc cache - if (!_FAT_cache_flush(partition->cache)) { - r->_errno = EIO; - errorOccured = true; - } - - if (errorOccured) { - return -1; - } else { - return 0; - } -} - -int _FAT_chdir_r (struct _reent *r, const char *path) { - PARTITION* partition = NULL; - - // Get the partition this directory is on - partition = _FAT_partition_getPartitionFromPath (path); - - if (partition == NULL) { - r->_errno = ENODEV; - return -1; - } - - // Move the path pointer to the start of the actual path - if (strchr (path, ':') != NULL) { - path = strchr (path, ':') + 1; - } - if (strchr (path, ':') != NULL) { - r->_errno = EINVAL; - return -1; - } - - // Set the default device to match this one - if (!_FAT_partition_setDefaultPartition (partition)) { - r->_errno = ENOENT; - return -1; - } - - // Try changing directory - if (_FAT_directory_chdir (partition, path)) { - // Successful - return 0; - } else { - // Failed - r->_errno = ENOTDIR; - return -1; - } -} - -int _FAT_rename_r (struct _reent *r, const char *oldName, const char *newName) { - PARTITION* partition = NULL; - DIR_ENTRY oldDirEntry; - DIR_ENTRY newDirEntry; - const char *pathEnd; - u32 dirCluster; - - // Get the partition this directory is on - partition = _FAT_partition_getPartitionFromPath (oldName); - - if (partition == NULL) { - r->_errno = ENODEV; - return -1; - } - - // Make sure the same partition is used for the old and new names - if (partition != _FAT_partition_getPartitionFromPath (newName)) { - r->_errno = EXDEV; - return -1; - } - - // Make sure we aren't trying to write to a read-only disc - if (partition->readOnly) { - r->_errno = EROFS; - return -1; - } - - // Move the path pointer to the start of the actual path - if (strchr (oldName, ':') != NULL) { - oldName = strchr (oldName, ':') + 1; - } - if (strchr (oldName, ':') != NULL) { - r->_errno = EINVAL; - return -1; - } - if (strchr (newName, ':') != NULL) { - newName = strchr (newName, ':') + 1; - } - if (strchr (newName, ':') != NULL) { - r->_errno = EINVAL; - return -1; - } - - // Search for the file on the disc - if (!_FAT_directory_entryFromPath (partition, &oldDirEntry, oldName, NULL)) { - r->_errno = ENOENT; - return -1; - } - - // Make sure there is no existing file / directory with the new name - if (_FAT_directory_entryFromPath (partition, &newDirEntry, newName, NULL)) { - r->_errno = EEXIST; - return -1; - } - - // Create the new file entry - // Get the directory it has to go in - pathEnd = strrchr (newName, DIR_SEPARATOR); - if (pathEnd == NULL) { - // No path was specified - dirCluster = partition->cwdCluster; - pathEnd = newName; - } else { - // Path was specified -- get the right dirCluster - // Recycling newDirEntry, since it needs to be recreated anyway - if (!_FAT_directory_entryFromPath (partition, &newDirEntry, newName, pathEnd) || - !_FAT_directory_isDirectory(&newDirEntry)) { - r->_errno = ENOTDIR; - return -1; - } - dirCluster = _FAT_directory_entryGetCluster (newDirEntry.entryData); - // Move the pathEnd past the last DIR_SEPARATOR - pathEnd += 1; - } - - // Copy the entry data - memcpy (&newDirEntry, &oldDirEntry, sizeof(DIR_ENTRY)); - - // Set the new name - strncpy (newDirEntry.filename, pathEnd, MAX_FILENAME_LENGTH - 1); - - // Write the new entry - if (!_FAT_directory_addEntry (partition, &newDirEntry, dirCluster)) { - r->_errno = ENOSPC; - return -1; - } - - // Remove the old entry - if (!_FAT_directory_removeEntry (partition, &oldDirEntry)) { - r->_errno = EIO; - return -1; - } - - // Flush any sectors in the disc cache - if (!_FAT_cache_flush (partition->cache)) { - r->_errno = EIO; - return -1; - } - - return 0; -} - -int _FAT_mkdir_r (struct _reent *r, const char *path, int mode) { - PARTITION* partition = NULL; - bool fileExists; - DIR_ENTRY dirEntry; - const char* pathEnd; - u32 parentCluster, dirCluster; - u8 newEntryData[DIR_ENTRY_DATA_SIZE]; - - partition = _FAT_partition_getPartitionFromPath (path); - - if (partition == NULL) { - r->_errno = ENODEV; - return -1; - } - - // Move the path pointer to the start of the actual path - if (strchr (path, ':') != NULL) { - path = strchr (path, ':') + 1; - } - if (strchr (path, ':') != NULL) { - r->_errno = EINVAL; - return -1; - } - - // Search for the file/directory on the disc - fileExists = _FAT_directory_entryFromPath (partition, &dirEntry, path, NULL); - - // Make sure it doesn't exist - if (fileExists) { - r->_errno = EEXIST; - return -1; - } - - if (partition->readOnly) { - // We can't write to a read-only partition - r->_errno = EROFS; - return -1; - } - - // Get the directory it has to go in - pathEnd = strrchr (path, DIR_SEPARATOR); - if (pathEnd == NULL) { - // No path was specified - parentCluster = partition->cwdCluster; - pathEnd = path; - } else { - // Path was specified -- get the right parentCluster - // Recycling dirEntry, since it needs to be recreated anyway - if (!_FAT_directory_entryFromPath (partition, &dirEntry, path, pathEnd) || - !_FAT_directory_isDirectory(&dirEntry)) { - r->_errno = ENOTDIR; - return -1; - } - parentCluster = _FAT_directory_entryGetCluster (dirEntry.entryData); - // Move the pathEnd past the last DIR_SEPARATOR - pathEnd += 1; - } - // Create the entry data - strncpy (dirEntry.filename, pathEnd, MAX_FILENAME_LENGTH - 1); - memset (dirEntry.entryData, 0, DIR_ENTRY_DATA_SIZE); - - // Set the creation time and date - dirEntry.entryData[DIR_ENTRY_cTime_ms] = 0; - u16_to_u8array (dirEntry.entryData, DIR_ENTRY_cTime, _FAT_filetime_getTimeFromRTC()); - u16_to_u8array (dirEntry.entryData, DIR_ENTRY_cDate, _FAT_filetime_getDateFromRTC()); - - // Set the directory attribute - dirEntry.entryData[DIR_ENTRY_attributes] = ATTRIB_DIR; - - // Get a cluster for the new directory - dirCluster = _FAT_fat_linkFreeClusterCleared (partition, CLUSTER_FREE); - if (dirCluster == CLUSTER_FREE) { - // No space left on disc for the cluster - r->_errno = ENOSPC; - return -1; - } - u16_to_u8array (dirEntry.entryData, DIR_ENTRY_cluster, dirCluster); - u16_to_u8array (dirEntry.entryData, DIR_ENTRY_clusterHigh, dirCluster >> 16); - - // Write the new directory's entry to it's parent - if (!_FAT_directory_addEntry (partition, &dirEntry, parentCluster)) { - r->_errno = ENOSPC; - return -1; - } - - // Create the dot entry within the directory - memset (newEntryData, 0, DIR_ENTRY_DATA_SIZE); - memset (newEntryData, ' ', 11); - newEntryData[DIR_ENTRY_name] = '.'; - newEntryData[DIR_ENTRY_attributes] = ATTRIB_DIR; - u16_to_u8array (newEntryData, DIR_ENTRY_cluster, dirCluster); - u16_to_u8array (newEntryData, DIR_ENTRY_clusterHigh, dirCluster >> 16); - - // Write it to the directory, erasing that sector in the process - _FAT_cache_eraseWritePartialSector ( partition->cache, newEntryData, - _FAT_fat_clusterToSector (partition, dirCluster), 0, DIR_ENTRY_DATA_SIZE); - - - // Create the double dot entry within the directory - newEntryData[DIR_ENTRY_name + 1] = '.'; - u16_to_u8array (newEntryData, DIR_ENTRY_cluster, parentCluster); - u16_to_u8array (newEntryData, DIR_ENTRY_clusterHigh, parentCluster >> 16); - - // Write it to the directory - _FAT_cache_writePartialSector ( partition->cache, newEntryData, - _FAT_fat_clusterToSector (partition, dirCluster), DIR_ENTRY_DATA_SIZE, DIR_ENTRY_DATA_SIZE); - - // Flush any sectors in the disc cache - if (!_FAT_cache_flush(partition->cache)) { - r->_errno = EIO; - return -1; - } - - return 0; -} - -DIR_ITER* _FAT_diropen_r(struct _reent *r, DIR_ITER *dirState, const char *path) { - DIR_ENTRY dirEntry; - DIR_STATE_STRUCT* state = (DIR_STATE_STRUCT*) (dirState->dirStruct); - bool fileExists; - - state->partition = _FAT_partition_getPartitionFromPath (path); - - if (state->partition == NULL) { - r->_errno = ENODEV; - return NULL; - } - - // Move the path pointer to the start of the actual path - if (strchr (path, ':') != NULL) { - path = strchr (path, ':') + 1; - } - if (strchr (path, ':') != NULL) { - r->_errno = EINVAL; - return NULL; - } - // Get the start cluster of the directory - fileExists = _FAT_directory_entryFromPath (state->partition, &dirEntry, path, NULL); - - if (!fileExists) { - r->_errno = ENOENT; - return NULL; - } - - // Make sure it is a directory - if (! _FAT_directory_isDirectory (&dirEntry)) { - r->_errno = ENOTDIR; - return NULL; - } - - // Save the start cluster for use when resetting the directory data - state->startCluster = _FAT_directory_entryGetCluster (dirEntry.entryData); - - // Get the first entry for use with a call to dirnext - state->validEntry = - _FAT_directory_getFirstEntry (state->partition, &(state->currentEntry), state->startCluster); - - // We are now using this entry - state->inUse = true; - return (DIR_ITER*) state; -} - -int _FAT_dirreset_r (struct _reent *r, DIR_ITER *dirState) { - DIR_STATE_STRUCT* state = (DIR_STATE_STRUCT*) (dirState->dirStruct); - - // Make sure we are still using this entry - if (!state->inUse) { - r->_errno = EBADF; - return -1; - } - - // Get the first entry for use with a call to dirnext - state->validEntry = - _FAT_directory_getFirstEntry (state->partition, &(state->currentEntry), state->startCluster); - - return 0; -} - -int _FAT_dirnext_r (struct _reent *r, DIR_ITER *dirState, char *filename, struct stat *filestat) { - DIR_STATE_STRUCT* state = (DIR_STATE_STRUCT*) (dirState->dirStruct); - - // Make sure we are still using this entry - if (!state->inUse) { - r->_errno = EBADF; - return -1; - } - - // Make sure there is another file to report on - if (! state->validEntry) { - r->_errno = ENOENT; - return -1; - } - - // Get the filename - strncpy (filename, state->currentEntry.filename, MAX_FILENAME_LENGTH); - // Get the stats, if requested - if (filestat != NULL) { - _FAT_directory_entryStat (state->partition, &(state->currentEntry), filestat); - } - - // Look for the next entry for use next time - state->validEntry = - _FAT_directory_getNextEntry (state->partition, &(state->currentEntry)); - - return 0; -} - -int _FAT_dirclose_r (struct _reent *r, DIR_ITER *dirState) { - DIR_STATE_STRUCT* state = (DIR_STATE_STRUCT*) (dirState->dirStruct); - - // We are no longer using this entry - state->inUse = false; - - return 0; -} |