void _FAT_cache_invalidate (CACHE* cache) {
unsigned int i;
_FAT_cache_flush(cache);
for (i = 0; i < cache->numberOfPages; i++) {
cache->cacheEntries[i].sector = CACHE_FREE;
cache->cacheEntries[i].last_access = 0;
cache->cacheEntries[i].count = 0;
cache->cacheEntries[i].dirty = false;
}
}
void _FAT_cache_destructor (CACHE* cache) {
unsigned int i;
// Clear out cache before destroying it
_FAT_cache_flush(cache);
// Free memory in reverse allocation order
for (i = 0; i < cache->numberOfPages; i++) {
_FAT_mem_free (cache->cacheEntries[i].cache);
}
_FAT_mem_free (cache->cacheEntries);
_FAT_mem_free (cache);
}
void flushFatCache() {
// This involves things from libfat which aren't normally visible
devoptab_t* devops = (devoptab_t*)GetDeviceOpTab ("sd");
PARTITION* partition = (PARTITION*)devops->deviceData;
_FAT_cache_flush(partition->cache); // Flush the cache manually
}
int fat_fflush(FILE_STRUCT *fp)
{
return(_FAT_cache_flush(fp->partition->cache));
}
int renamex( 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) {
errno = ENODEV;
return -1;
}
// Make sure the same partition is used for the old and new names
if (partition != _FAT_partition_getPartitionFromPath (newName)) {
errno = EXDEV;
return -1;
}
// Make sure we aren't trying to write to a read-only disc
if (partition->readOnly) {
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) {
errno = EINVAL;
return -1;
}
if (strchr (newName, ':') != NULL) {
newName = strchr (newName, ':') + 1;
}
if (strchr (newName, ':') != NULL) {
errno = EINVAL;
return -1;
}
// Search for the file on the disc
if (!_FAT_directory_entryFromPath (partition, &oldDirEntry, oldName, NULL)) {
errno = ENOENT;
return -1;
}
// Make sure there is no existing file / directory with the new name
if (_FAT_directory_entryFromPath (partition, &newDirEntry, newName, NULL)) {
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)) {
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)) {
errno = ENOSPC;
return -1;
}
// Remove the old entry
if (!_FAT_directory_removeEntry (partition, &oldDirEntry)) {
errno = EIO;
return -1;
}
// Flush any sectors in the disc cache
if (!_FAT_cache_flush (partition->cache)) {
errno = EIO;
return -1;
}
return 0;
}
