#include <iostream>
#include <iterator>
-#include <vector>
#include <algorithm>
+#include <cassert>
#include <sqlite3.h>
assert( SQLITE_OK == rc );
// Now divide the two sets into three sets (new, deleted and updated )
- FileDataPtrCmp cmp;
+ FileDataNameCmp cmp;
- file_set new_set;
- set_difference( current.begin(), current.end(),
+ file_set added;
+ set_difference( current.begin(), current.end(),
backed_up.begin(), backed_up.end(),
- inserter( new_set, new_set.begin() ),
+ inserter( added, added.begin() ),
cmp );
file_set deleted;
set_difference( backed_up.begin(), backed_up.end(),
- current.begin(), current.end(),
+ current.begin(), current.end(),
inserter( deleted, deleted.begin() ),
cmp );
- // backed_up should *definitely* be the first set here
file_set updated;
- set_difference( backed_up.begin(), backed_up.end(),
- current.begin(), current.end(),
- inserter( updated, updated.begin() ),
- cmp );
+ set_union( current.begin(), current.end(),
+ backed_up.begin(), backed_up.end(),
+ inserter( updated, updated.begin() ),
+ cmp );
+
+ { // This little block will copy the last_backup_date from the second set to the first
+ file_set updated_mirror;
+ set_union( current.begin(), current.end(),
+ backed_up.begin(), backed_up.end(),
+ inserter( updated_mirror, updated_mirror.begin() ),
+ cmp );
+
+ // TODO Now we need to copy the last_backup_date from
+ file_set::iterator i = updated.begin(), j = updated_mirror.begin();
+ for( ; i != updated.end(); ++i, ++j ) {
+ (*i)->setLastBackupDate( (*j)->getLastBackupDate() );
+ }
+ }
// Now find the list of files to backup.
- file_set backup_list;
+ file_set backup_set;
// backup all new files
- copy( new_set.begin(), new_set.end(), inserter( backup_list, backup_list.begin() ) );
+ copy( added.begin(), added.end(), inserter( backup_set, backup_set.begin() ) );
// backup already backed-up files that have changed since the last backup date.
for( file_set::iterator i = updated.begin(); i != updated.end(); ++i ) {
if( (*i)->getLastBackupDate() < (*i)->getModifiedDate() ) {
- backup_list.insert( *i );
+ backup_set.insert( *i );
}
}
- // Now, sort the backup_list by filesize and build a list of up to SIZE
-
- // Now, sort the non-backed-up list my last_backup_date and back-fill
+ // Now, sort the backup_set by filesize and build a list of up to SIZE
+ file_vector backups_bysize;
+ copy( backup_set.begin(), backup_set.end(), back_inserter( backups_bysize ) );
+ FileDataSizeCmp sizecmp;
+ sort( backups_bysize.begin(), backups_bysize.end(), sizecmp );
+
+ file_set final_set;
+ unsigned long long bytes_available = 4700000000ULL; // 4.3 GBytes
+
+ unsigned long long block_size = 512ULL;
+
+ // Copy files over until full or out of files
+ file_vector::reverse_iterator i = backups_bysize.rbegin();
+ while( 0 != bytes_available && i != backups_bysize.rend() ) {
+ unsigned long long size = (*i)->getFileSize();
+ unsigned long long blocks = size & ( ~(block_size-1) );
+ if( blocks < size ) blocks += block_size;
+ if( blocks <= bytes_available ) {
+ bytes_available -= blocks;
+ final_set.insert( *i );
+ }
+ ++i;
+ }
- // Remove deleted files from the database.
- const char *delete_sql = "delete from filedata where filename = :filename";
- sqlite3_stmt *ppStmt;
+ // Now, sort the non-backed-up list by last_backup_date and back-fill
+ if( 0 != bytes_available ) {
+ file_vector leftovers;
+ set_difference( current.begin(), current.end(),
+ final_set.begin(), final_set.end(),
+ back_inserter( leftovers ),
+ cmp );
- sqlite3_prepare( db, delete_sql, -1, &ppStmt, NULL );
- assert( NULL != ppStmt );
+ FileDataLastBackupCmp lastbackupcmp;
+ sort( leftovers.begin(), leftovers.end(), lastbackupcmp );
- for( file_set::iterator i = deleted.begin(); i != deleted.end(); ++i ) {
- const string &name = (*i)->getFileName();
+ // Copy files over until full or out of files
+ file_vector::const_iterator j = leftovers.begin();
+ while( 0 != bytes_available && j != leftovers.end() ) {
+ unsigned long long size = (*j)->getFileSize();
+ unsigned long long blocks = size & ( ~(block_size-1) );
- rc = sqlite3_bind_text( ppStmt, 1, name.data(), name.size(), SQLITE_TRANSIENT );
- assert( SQLITE_OK == rc );
+ if( blocks < size ) blocks += block_size;
- rc = sqlite3_step( ppStmt );
- assert( SQLITE_OK == rc );
+ if( blocks <= bytes_available ) {
+ bytes_available -= blocks;
+ final_set.insert( *j );
+ }
+ ++j;
+ }
}
- rc = sqlite3_finalize( ppStmt );
- assert( SQLITE_OK == rc );
- // Now, use the current set to update values in the database. You should copy
- // last_backup_date dates from the backed_up set first. This will get all of
- // the latest permissions but include the last_backup_date.
+ unsigned long long now = 20051019211200ULL;
+ for( file_set::iterator k = final_set.begin(); k != final_set.end(); ++k ) {
+ (*k)->setLastBackupDate( now );
+ }
- // Now, update the last_backup_date for all of the files that are in the list
+ // Clean out the database
+ rc = sqlite3_exec( db, "delete from filedata;", NULL, NULL, &sqliteErrMsg );
+ assert( SQLITE_OK == rc );
+ rc = sqlite3_exec( db, "vacuum;", NULL, NULL, &sqliteErrMsg );
+ assert( SQLITE_OK == rc );
// Clean-up
for( file_set::iterator i = backed_up.begin(); i != backed_up.end(); ++i ) { delete *i; }