diff options
Diffstat (limited to 'core/fs/ntfs/runlist.h')
-rw-r--r-- | core/fs/ntfs/runlist.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/core/fs/ntfs/runlist.h b/core/fs/ntfs/runlist.h new file mode 100644 index 00000000..4938696b --- /dev/null +++ b/core/fs/ntfs/runlist.h @@ -0,0 +1,83 @@ +/* + * Copyright (C) 2011 Paulo Alcantara <pcacjr@gmail.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the + * Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +*/ + +#ifndef _RUNLIST_H_ +#define _RUNLIST_H_ + +struct runlist_element { + uint64_t vcn; + int64_t lcn; + uint64_t len; +}; + +struct runlist { + struct runlist_element run; + struct runlist *next; +}; + +static struct runlist *tail; + +static inline bool runlist_is_empty(struct runlist *rlist) +{ + return !rlist; +} + +static inline struct runlist *runlist_alloc(void) +{ + struct runlist *rlist; + + rlist = malloc(sizeof *rlist); + if (!rlist) + malloc_error("runlist structure"); + + rlist->next = NULL; + + return rlist; +} + +static inline void runlist_append(struct runlist **rlist, + struct runlist_element *elem) +{ + struct runlist *n = runlist_alloc(); + + n->run = *elem; + + if (runlist_is_empty(*rlist)) { + *rlist = n; + tail = n; + } else { + tail->next = n; + tail = n; + } +} + +static inline struct runlist *runlist_remove(struct runlist **rlist) +{ + struct runlist *ret; + + if (runlist_is_empty(*rlist)) + return NULL; + + ret = *rlist; + *rlist = ret->next; + + return ret; +} + +#endif /* _RUNLIST_H_ */ |