Fossil

}

/*
** Begin capturing a snapshot that can be undone.
*/
void undo_begin(void){
  int cid;
  const char *zDb = db_name("localdb");
  static const char zSql[] =
    @ CREATE TABLE "%w".undo(
    @   pathname TEXT UNIQUE,             -- Name of the file
    @   redoflag BOOLEAN,                 -- 0 for undoable.  1 for redoable
    @   existsflag BOOLEAN,               -- True if the file exists
    @   isExe BOOLEAN,                    -- True if the file is executable
    @   isLink BOOLEAN,                   -- True if the file is symlink
    @   content BLOB                      -- Saved content
    @ );
    @ CREATE TABLE "%w".undo_vfile AS SELECT * FROM vfile;
    @ CREATE TABLE "%w".undo_vmerge AS SELECT * FROM vmerge;
  ;
  if( undoDisable ) return;
  undo_reset();
  db_multi_exec(zSql/*works-like:"%w,%w,%w"*/, zDb, zDb, zDb);
  cid = db_lget_int("checkout", 0);
  db_lset_int("undo_checkout", cid);
  db_lset_int("undo_available", 1);
  db_lset("undo_cmdline", undoCmd);
  undoActive = 1;
}

  return zRc;
}

/*
** Make the current state of stashid undoable.
*/
void undo_save_stash(int stashid){
  const char *zDb = db_name("localdb");
  db_multi_exec(
    "CREATE TABLE IF NOT EXISTS \"%w\".undo_stash"
    "  AS SELECT * FROM stash WHERE 0;"
    "INSERT INTO undo_stash"
    " SELECT * FROM stash WHERE stashid=%d;",
    zDb, stashid
  );
  db_multi_exec(
    "CREATE TABLE IF NOT EXISTS \"%w\".undo_stashfile"
    "  AS SELECT * FROM stashfile WHERE 0;"
    "INSERT INTO undo_stashfile"
    " SELECT * FROM stashfile WHERE stashid=%d;",
    zDb, stashid
  );
}

/*
** Complete the undo process is one is currently in process.
*/
void undo_finish(void){