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author | Nebuleon Fumika | 2013-02-03 04:19:11 -0500 |
---|---|---|
committer | Nebuleon Fumika | 2013-02-03 04:19:11 -0500 |
commit | 8693ae1bd880a758eb2efec4fccd32f89593855d (patch) | |
tree | 660b7ceed1789fc904332b96a2a4006b0e4cc6b8 /sdk-modifications/libsrc/fs/fatdir.c | |
parent | 02f8184fe07d99cceb85f4abd3ef0e5e3765b5ea (diff) | |
download | snesemu-8693ae1bd880a758eb2efec4fccd32f89593855d.tar.gz snesemu-8693ae1bd880a758eb2efec4fccd32f89593855d.tar.bz2 snesemu-8693ae1bd880a758eb2efec4fccd32f89593855d.zip |
Add SDK modifications by BassAceGold as of 2011-04-14, as well as modified DMA functions as of 2013-01-29.
Diffstat (limited to 'sdk-modifications/libsrc/fs/fatdir.c')
-rw-r--r-- | sdk-modifications/libsrc/fs/fatdir.c | 672 |
1 files changed, 672 insertions, 0 deletions
diff --git a/sdk-modifications/libsrc/fs/fatdir.c b/sdk-modifications/libsrc/fs/fatdir.c new file mode 100644 index 0000000..dc9b914 --- /dev/null +++ b/sdk-modifications/libsrc/fs/fatdir.c @@ -0,0 +1,672 @@ +/*
+ 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
+*/
+
+/*
+ 2010.06.30
+ * Modify _FAT_diropen_r,
+*/
+
+#include <string.h>
+#include <errno.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <sys/dir.h>
+
+#include "fatdir.h"
+
+#include "fs_cache.h"
+#include "file_allocation_table.h"
+#include "partition.h"
+#include "directory.h"
+#include "bit_ops.h"
+#include "filetime.h"
+#include "fs_unicode.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_getshortname_r (struct _reent *r, const char *name, char *outName) {
+ PARTITION* partition = NULL;
+ DIR_ENTRY DirEntry;
+ u32 dirCluster;
+
+ // Get the partition this directory is on
+ partition = _FAT_partition_getPartitionFromPath (name);
+
+ if (partition == NULL) {
+ r->_errno = ENODEV;
+ return 1;
+ }
+
+ // Move the path pointer to the start of the actual path
+ if (strchr (name, ':') != NULL) {
+ name = strchr (name, ':') + 1;
+ }
+ if (strchr (name, ':') != NULL) {
+ r->_errno = EINVAL;
+ return 1;
+ }
+
+ // Search for the file on the disc
+ if (!_FAT_directory_entryFromPath (partition, &DirEntry, name, NULL)) {
+ r->_errno = ENOENT;
+ return 1;
+ }
+
+ strcpy(outName, DirEntry.entryData);
+ return 1;
+}
+
+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.d_name, 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_hideAttrib_r (struct _reent *r, const char *name, u8 hide) {
+ PARTITION* partition = NULL;
+ DIR_ENTRY oldDirEntry;
+ DIR_ENTRY newDirEntry;
+ u32 dirCluster;
+
+ // Get the partition this directory is on
+ partition = _FAT_partition_getPartitionFromPath (name);
+
+ 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 (name, ':') != NULL) {
+ name = strchr (name, ':') + 1;
+ }
+ if (strchr (name, ':') != NULL) {
+ r->_errno = EINVAL;
+ return -1;
+ }
+
+ // Search for the file on the disc
+ if (!_FAT_directory_entryFromPath (partition, &oldDirEntry, name, NULL)) {
+ r->_errno = ENOENT;
+ return -1;
+ }
+
+ // Create the new file entry
+ // Get the directory it has to go in
+ memcpy (&newDirEntry, &oldDirEntry, sizeof(DIR_ENTRY));
+
+ // No path was specified
+ dirCluster = partition->cwdCluster;
+
+ // Remove the old entry hopefully doesn't screw things up...
+ if (!_FAT_directory_removeEntry (partition, &oldDirEntry)) {
+ r->_errno = EIO;
+ return -1;
+ }
+
+ // Set the new attribute
+ if(hide)
+ newDirEntry.entryData[DIR_ENTRY_attributes] |= ATTRIB_HID;
+ else
+ newDirEntry.entryData[DIR_ENTRY_attributes] &= ~ATTRIB_HID;
+
+ // Write the new entry
+ if (!_FAT_directory_addEntry (partition, &newDirEntry, dirCluster)) {
+ r->_errno = ENOSPC;
+ 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.d_name, 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_STATE_STRUCT* _FAT_diropen_r(struct _reent *r, DIR_STATE_STRUCT *dirState, const char *path) {
+ DIR_ENTRY dirEntry;
+ DIR_STATE_STRUCT* state = dirState;
+ bool fileExists;
+ const char* root_path= "/";
+
+ 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;
+ }
+
+ if('\0' == path[0]) path = root_path;
+
+ // 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);
+
+ //Entry location pointer
+ state->posEntry = 0;
+
+// // Get the first entry for use with a call to dirnext
+// state->validEntry =
+// _FAT_directory_getFirstEntry (state->partition, &(state->currentEntry), state->startCluster);
+ state->validEntry = false;
+
+ // We are now using this entry
+ state->inUse = true;
+ return state;
+}
+
+int _FAT_dirreset_r (struct _reent *r, DIR_STATE_STRUCT *dirState) {
+ DIR_STATE_STRUCT* state = dirState;
+
+ // 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);
+
+ state->posEntry = 0;
+
+ return 0;
+}
+
+int _FAT_dirnext_r (struct _reent *r, DIR_STATE_STRUCT *dirState, struct stat *filestat) {
+ DIR_STATE_STRUCT* state = dirState;
+
+ // 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;
+// }
+
+ if(0 == state->posEntry) {
+ state->validEntry = _FAT_directory_getFirstEntry (state->partition, &(state->currentEntry), state->startCluster);
+ }
+ else
+ state->validEntry = _FAT_directory_getNextEntry (state->partition, &(state->currentEntry));
+
+ state->posEntry += 1;
+
+ if(!state->validEntry)
+ {
+ r->_errno = ENOENT;
+ return -1;
+ }
+
+ if (filestat != NULL) {
+ _FAT_directory_entryStat (state->partition, &(state->currentEntry), filestat);
+ }
+
+ return 0;
+/*
+ // Get the filename
+ strncpy (filename, state->currentEntry.d_name, 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_STATE_STRUCT *dirState) {
+ DIR_STATE_STRUCT* state = dirState;
+
+ // We are no longer using this entry
+ state->inUse = false;
+
+ return 0;
+}
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