8 #include "filedata.hpp"
12 vector<string> split( const string &line, char c, int limit = -1 ) {
13 string::size_type start = 0, end = 0;
16 while( 0 != limit-- && end != line.size() ) {
20 end = line.find( c, start );
21 if( end == string::npos ) {
25 out.push_back( line.substr( start, end-start ) );
31 // Callback function for getting files from the database
32 int populate_set( void *files_v, int, char **vals, char ** ) {
33 file_set *files = reinterpret_cast<file_set*>( files_v );
34 files->insert( new FileData( vals[0][0],
49 // Parse the list of files on stdin
52 for( int c = cin.get(); 0 != c && ! cin.eof(); c = cin.get() ) {
53 file_string.push_back( c );
55 if( 0 != file_string.size() ) {
57 // type perms user group size datemodified name (7 total)
58 // f 0600 cnb cnb 424 20051015205340 ./.git/index
59 vector<string> vals = split( file_string, ' ', 7 );
60 current.insert( new FileData( vals[0][0],
64 atoi( vals[4].c_str() ),
65 atoi( vals[5].c_str() ),
68 } while( ! cin.eof() );
70 // Get the list of previously backed up files from the database.
73 const char *dbname = "test.db";
74 int rc = sqlite3_open( dbname, &db );
75 assert( SQLITE_OK == rc );
77 char *sqliteErrMsg = 0;
79 rc = sqlite3_exec( db, "select * from filedata;", populate_set, &backed_up, &sqliteErrMsg );
80 assert( SQLITE_OK == rc );
82 rc = sqlite3_close( db );
83 assert( SQLITE_OK == rc );
85 // Now divide the two sets into three sets (new, deleted and updated )
89 set_difference( current.begin(), current.end(),
90 backed_up.begin(), backed_up.end(),
91 inserter( added, added.begin() ),
95 set_difference( backed_up.begin(), backed_up.end(),
96 current.begin(), current.end(),
97 inserter( deleted, deleted.begin() ),
101 set_union( current.begin(), current.end(),
102 backed_up.begin(), backed_up.end(),
103 inserter( updated, updated.begin() ),
106 { // This little block will copy the last_backup_date from the second set to the first
107 file_set updated_mirror;
108 set_union( current.begin(), current.end(),
109 backed_up.begin(), backed_up.end(),
110 inserter( updated_mirror, updated_mirror.begin() ),
113 // TODO Now we need to copy the last_backup_date from
114 file_set::iterator i = updated.begin(), j = updated_mirror.begin();
115 for( ; i != updated.end(); ++i, ++j ) {
116 (*i)->setLastBackupDate( (*j)->getLastBackupDate() );
120 // Now find the list of files to backup.
123 // backup all new files
124 copy( added.begin(), added.end(), inserter( backup_set, backup_set.begin() ) );
126 // backup already backed-up files that have changed since the last backup date.
127 for( file_set::iterator i = updated.begin(); i != updated.end(); ++i ) {
128 if( (*i)->getLastBackupDate() < (*i)->getModifiedDate() ) {
129 backup_set.insert( *i );
133 // Now, sort the backup_set by filesize and build a list of up to SIZE
134 file_vector backups_bysize;
135 copy( backup_set.begin(), backup_set.end(), back_inserter( backups_bysize ) );
136 FileDataSizeCmp sizecmp;
137 sort( backups_bysize.begin(), backups_bysize.end(), sizecmp );
140 unsigned long long bytes_available = 4700000000ULL; // 4.3 GBytes
142 unsigned long long block_size = 512ULL;
144 // Copy files over until full or out of files
145 file_vector::reverse_iterator i = backups_bysize.rbegin();
146 while( 0 != bytes_available && i != backups_bysize.rend() ) {
147 unsigned long long size = (*i)->getFileSize();
148 unsigned long long blocks = size & ( ~(block_size-1) );
149 if( blocks < size ) blocks += block_size;
150 if( blocks <= bytes_available ) {
151 bytes_available -= blocks;
152 final_set.insert( *i );
157 // Now, sort the non-backed-up list by last_backup_date and back-fill
158 if( 0 != bytes_available ) {
159 file_vector leftovers;
160 set_difference( current.begin(), current.end(),
161 final_set.begin(), final_set.end(),
162 back_inserter( leftovers ),
165 FileDataLastBackupCmp lastbackupcmp;
166 sort( leftovers.begin(), leftovers.end(), lastbackupcmp );
168 // Copy files over until full or out of files
169 file_vector::const_iterator j = leftovers.begin();
170 while( 0 != bytes_available && j != leftovers.end() ) {
171 unsigned long long size = (*j)->getFileSize();
172 unsigned long long blocks = size & ( ~(block_size-1) );
174 if( blocks < size ) blocks += block_size;
176 if( blocks <= bytes_available ) {
177 bytes_available -= blocks;
178 final_set.insert( *j );
184 unsigned long long now = 20051019211200ULL;
185 for( file_set::iterator k = final_set.begin(); k != final_set.end(); ++k ) {
186 (*k)->setLastBackupDate( now );
189 // Clean out the database
190 rc = sqlite3_exec( db, "delete from filedata;", NULL, NULL, &sqliteErrMsg );
191 assert( SQLITE_OK == rc );
192 rc = sqlite3_exec( db, "vacuum;", NULL, NULL, &sqliteErrMsg );
193 assert( SQLITE_OK == rc );
196 for( file_set::iterator i = backed_up.begin(); i != backed_up.end(); ++i ) { delete *i; }
197 for( file_set::iterator i = current.begin(); i != current.end(); ++i ) { delete *i; }