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pull/3/head
Jonathan Moore Liles 2008-06-03 23:41:53 -05:00
parent 2a67c132f4
commit c3603a8bfd
1 changed files with 25 additions and 15 deletions
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40
Timeline/Loggable.C
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@ -41,6 +41,9 @@ Loggable ** Loggable::_loggables;
std::map <std::string, create_func*> Loggable::_class_map;
std::queue <char *> Loggable::_transaction;
/** Open the journal /filename/ and replay it, bringing the end state back into RAM */
bool
Loggable::open ( const char *filename )
{
@ -54,6 +57,7 @@ Loggable::open ( const char *filename )
/* replay log */
{
/* FIXME: bogus */
char buf[BUFSIZ];
while ( fscanf( fp, "%[^\n]\n", buf ) == 1 )
@ -68,13 +72,12 @@ Loggable::open ( const char *filename )
}
}
Loggable::_fp = fp;
return true;
}
/** close journal and delete all loggable objects */
/** close journal and delete all loggable objects, returing the systemt to a blank slate */
bool
Loggable::close ( void )
{
@ -104,8 +107,7 @@ Loggable::close ( void )
return true;
}
/** must be called after construction in create() methods */
/** must be called after construction in create() methods */
void
Loggable::update_id ( int id )
{
@ -192,11 +194,11 @@ Loggable::do_this ( const char *s, bool reverse )
if ( ! strcmp( command, destroy ) )
{
/* deleting eg. a track, which contains a list of other
widgets, causes destroy messages to be emitted for all those
widgets, but when replaying the journal the destroy message
causes the children to be deleted also... This is a temporary
hack. Would it be better to queue up objects for deletion
(when?) */
widgets, causes destroy messages to be emitted for all those
widgets, but when replaying the journal the destroy message
causes the children to be deleted also... This is a temporary
hack. Would it be better to queue up objects for deletion
(when?) */
if ( l )
delete l;
}
@ -231,6 +233,7 @@ Loggable::do_this ( const char *s, bool reverse )
return true;
}
/** Reverse the last journal transaction */
void
Loggable::undo ( void )
{
@ -311,7 +314,7 @@ Loggable::undo ( void )
s++;
if ( ! strcmp( s, "{" ) )
break;
break;
if ( *s == '\t' )
s++;
@ -377,10 +380,10 @@ Loggable::snapshot( FILE *fp )
return true;
}
/** Replace the journal with a snapshot of the current state */
void
Loggable::compact ( void )
{
fseek( _fp, 0, SEEK_SET );
ftruncate( fileno( _fp ), 0 );
@ -389,7 +392,7 @@ Loggable::compact ( void )
_undo_index = 1;
}
/** Buffered sprintf wrapper */
void
Loggable::log ( const char *fmt, ... )
{
@ -413,11 +416,10 @@ Loggable::log ( const char *fmt, ... )
}
}
/** End the current transaction and commit it to the journal */
void
Loggable::flush ( void )
{
if ( ! _fp )
{
// printf( "error: no log file open!\n" );
@ -461,6 +463,7 @@ Loggable::flush ( void )
fflush( _fp );
}
/** Print bidirectional journal entry */
void
Loggable::log_print( const Log_Entry *o, const Log_Entry *n ) const
{
@ -495,6 +498,9 @@ Loggable::log_print( const Log_Entry *o, const Log_Entry *n ) const
}
/** Remember current object state for later comparison. *Must* be
* called before any user action that might change one of the object's
* journaled properties. */
void
Loggable::log_start ( void )
{
@ -507,10 +513,10 @@ Loggable::log_start ( void )
++_nest;
}
/** Log any change to the object's state since log_start(). */
void
Loggable::log_end ( void )
{
if ( --_nest > 0 )
return;
@ -539,6 +545,8 @@ Loggable::log_end ( void )
Loggable::flush();
}
/** Log object creation. *Must* be called at the end of all public
* constructors for leaf classes */
void
Loggable::log_create ( void ) const
{
@ -554,6 +562,8 @@ Loggable::log_create ( void ) const
Loggable::flush();
}
/** Log object destruction. *Must* be called at the beginning of the
* destructors of leaf classes */
void
Loggable::log_destroy ( void ) const
{