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Work on block undo.

This commit is contained in:
Jonathan Moore Liles 2008-03-05 01:05:08 -06:00
parent 790f371456
commit bccdecdee6
1 changed files with 77 additions and 43 deletions
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120
Loggable.C
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@ -24,6 +24,7 @@
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
FILE *Loggable::_fp;
int Loggable::_log_id = 0;
@ -198,15 +199,21 @@ Loggable::undo ( void )
if ( *(s + 1) == '\t' )
continue;
if ( *(s + 1) == '}' )
{
*(s + 1) = NULL;
continue;
}
break;
}
}
s++;
strtok( s, "\n" );
buf[ len ] = NULL;
// fsync( fileno( _fp ) );
/* pop the entry off the end */
@ -219,22 +226,48 @@ Loggable::undo ( void )
return;
}
printf( "undoing \"%s\"\n", s );
char *b = s;
int id;
sscanf( s, "%*s %X ", &id );
Loggable *l = find( id );
// assert( l );
s += strlen( s ) - 1;
char classname[40];
char command[40];
char *arguments;
sscanf( s, "%s %*X %s %*[^\n<] << %a[^\n]", classname, command, &arguments );
if ( strtok( b, "\n" ) == NULL )
{
printf( "error, empty undo transaction!\n" );
abort();
}
int n = 1;
while ( strtok( NULL, "\n" ) )
++n;
int ui = _undo_index;
while ( n-- )
{
while ( s >= b && *(--s) );
s++;
if ( ( ! strcmp( s, "{" ) )
|| ( ! strcmp( s, "}" ) ) )
continue;
if ( *s == '\t' )
s++;
printf( "undoing \"%s\"\n", s );
int id;
sscanf( s, "%*s %X ", &id );
Loggable *l = find( id );
// assert( l );
char classname[40];
char command[40];
char *arguments;
sscanf( s, "%s %*X %s %*[^\n<] << %a[^\n]", classname, command, &arguments );
/* if ( ! l ) */
/* { */
@ -242,49 +275,50 @@ Loggable::undo ( void )
/* abort(); */
/* } */
if ( ! strcmp( command, "destroy" ) )
{
char **sa = parse_alist( arguments );
if ( ! _class_map[ string( classname ) ] )
printf( "error class %s is unregistered!\n", classname );
else
{
/* create */
Loggable *l = _class_map[ string( classname ) ]( sa );
l->update_id( id );
l->log_create();
}
}
else
if ( ! strcmp( command, "set" ) )
if ( ! strcmp( command, "destroy" ) )
{
char **sa = parse_alist( arguments );
printf( "got set command.\n" );
char **sa = parse_alist( arguments );
l->log_start();
l->set( sa );
l->log_end();
}
else
if ( ! strcmp( command, "create" ) )
if ( ! _class_map[ string( classname ) ] )
printf( "error class %s is unregistered!\n", classname );
else
{
int id = l->id();
delete l;
_loggables[ id ] = NULL;
/* create */
Loggable *l = _class_map[ string( classname ) ]( sa );
l->update_id( id );
l->log_create();
}
}
else
if ( ! strcmp( command, "set" ) )
{
printf( "got set command.\n" );
char **sa = parse_alist( arguments );
l->log_start();
l->set( sa );
l->log_end();
}
else
if ( ! strcmp( command, "create" ) )
{
int id = l->id();
delete l;
_loggables[ id ] = NULL;
}
s -= 2;
}
// FIXME: bogus... needs to account for multiple events.
_undo_index = ui + 1;
++_undo_index;
delete buf;
}