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profuse
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copy() 

git-svn-id: https://profuse.googlecode.com/svn/branches/v2@301 aa027e90-d47c-11dd-86d7-074df07e0730
This commit is contained in:
ksherlock 2010-05-30 21:16:06 +00:00
parent c4ea7cc0f8
commit e2b20ccfba
1 changed files with 62 additions and 3 deletions
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65
Pascal/VolumeEntry.cpp
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@ -412,7 +412,8 @@ int VolumeEntry::rename(const char *oldName, const char *newName)
*/
int VolumeEntry::copy(const char *oldName, const char *newName)
{
FileEntry * e;
FileEntry *oldEntry;
FileEntry *newEntry;
// check if read only.
if (_device->readOnly())
{
@ -421,8 +422,8 @@ int VolumeEntry::copy(const char *oldName, const char *newName)
}
// verify file exists.
e = fileByName(oldName);
if (!e)
oldEntry = fileByName(oldName);
if (!oldEntry)
{
errno = ENOENT;
return -1;
@ -439,6 +440,64 @@ int VolumeEntry::copy(const char *oldName, const char *newName)
// if newName does not exist, call create w/ block size and write everything.
// if newName does exist, overwrite it if it will fit. Otherwise, remove it, create a file, etc.
unsigned blocks = oldEntry->blocks();
newEntry = fileByName(newName);
if (newEntry)
{
// if newEntry is large enough, overwrite it.
if (newEntry->_maxFileSize >= blocks * 512)
{
if (newEntry->_pageSize)
{
delete newEntry->_pageSize;
newEntry->_pageSize = NULL;
newEntry->_fileSize = 0;
}
}
else
{
if (maxContiguousBlocks() < blocks)
{
errno = ENOSPC;
return -1;
}
newEntry = NULL;
if (unlink(newName) != 0) return -1;
}
}
if (newEntry == NULL)
{
// newName does not exist (or was just deleted), so create a new file (if possible) and write to it.
if (maxContiguousBlocks() < blocks)
{
errno = ENOSPC;
return -1;
}
newEntry = create(newName, blocks);
if (!newEntry) return -1; // create() sets errno.
}
newEntry->_fileKind = oldEntry->fileKind();
newEntry->_lastByte = oldEntry->lastByte();
newEntry->_lastBlock = newEntry->firstBlock() + blocks;
newEntry->_modification = Date::Today();
for (unsigned i = 0; i < blocks; i++)
{
void *src = loadBlock(oldEntry->firstBlock() + i);
_cache->write(newEntry->firstBlock() + i, src);
unloadBlock(oldEntry->firstBlock() + i, false);
}
_cache->sync();
return 0;