/*
- * Version $Id$
- */
+ Bacula(R) - The Network Backup Solution
-/*
- Copyright (C) 2000-2003 Kern Sibbald and John Walker
+ Copyright (C) 2000-2015 Kern Sibbald
+ Copyright (C) 2004-2014 Free Software Foundation Europe e.V.
- 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.
+ The original author of Bacula is Kern Sibbald, with contributions
+ from many others, a complete list can be found in the file AUTHORS.
- 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 may use this file and others of this release according to the
+ license defined in the LICENSE file, which includes the Affero General
+ Public License, v3.0 ("AGPLv3") and some additional permissions and
+ terms pursuant to its AGPLv3 Section 7.
- 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.
+ This notice must be preserved when any source code is
+ conveyed and/or propagated.
+ Bacula(R) is a registered trademark of Kern Sibbald.
+*/
+/*
+ * Written by Kern Sibbald MMIV
+ *
*/
+
/* ========================================================================
- *
+ *
* Doubly linked list -- dlist
*
+ * See the end of the file for the dlistString class which
+ * facilitates storing strings in a dlist.
+ *
+ * Kern Sibbald, MMIV and MMVII
+ *
*/
-#define OFFSET(item,link) ((char *)link - (char *)item)
+#define M_ABORT 1
+
+/* In case you want to specifically specify the offset to the link */
+#define OFFSET(item, link) (int)((char *)(link) - (char *)(item))
+/*
+ * There is a lot of extra casting here to work around the fact
+ * that some compilers (Sun and Visual C++) do not accept
+ * (void *) as an lvalue on the left side of an equal.
+ *
+ * Loop var through each member of list
+ */
+#ifdef HAVE_TYPEOF
+#define foreach_dlist(var, list) \
+ for((var)=NULL; ((var)=(typeof(var))(list)->next(var)); )
+#else
+#define foreach_dlist(var, list) \
+ for((var)=NULL; (*((void **)&(var))=(void*)((list)->next(var))); )
+#endif
struct dlink {
void *next;
void *prev;
};
-class dlist {
+class dlist : public SMARTALLOC {
void *head;
void *tail;
- int loffset;
+ int16_t loffset;
+ uint32_t num_items;
public:
- dlist(void *item, void *link);
- void init(void *item, void *link);
+ dlist(void *item, dlink *link);
+ dlist(void);
+ ~dlist() { destroy(); }
+ void init(void *item, dlink *link);
+ void init();
void prepend(void *item);
void append(void *item);
+ void set_prev(void *item, void *prev);
+ void set_next(void *item, void *next);
+ void *get_prev(void *item);
+ void *get_next(void *item);
+ dlink *get_link(void *item);
void insert_before(void *item, void *where);
void insert_after(void *item, void *where);
+ void *binary_insert(void *item, int compare(void *item1, void *item2));
+ void *binary_search(void *item, int compare(void *item1, void *item2));
+ void binary_insert_multiple(void *item, int compare(void *item1, void *item2));
void remove(void *item);
- bool empty();
+ bool empty() const;
+ int size() const;
void *next(void *item);
void *prev(void *item);
void destroy();
- void *first();
- void *last();
- void * operator new(size_t);
- void operator delete(void *);
+ void *first() const;
+ void *last() const;
};
-/*
+
+/*
* This allows us to do explicit initialization,
* allowing us to mix C++ classes inside malloc'ed
* C structures. Define before called in constructor.
*/
-inline void dlist::init(void *item, void *link)
+inline void dlist::init(void *item, dlink *link)
{
head = tail = NULL;
- loffset = (char *)link - (char *)item;
+ loffset = (int)((char *)link - (char *)item);
+ if (loffset < 0 || loffset > 5000) {
+ Emsg0(M_ABORT, 0, "Improper dlist initialization.\n");
+ }
+ num_items = 0;
}
-/* Constructor */
-inline dlist::dlist(void *item, void *link)
+inline void dlist::init()
{
- this->init(item, link);
+ head = tail = NULL;
+ loffset = 0;
+ num_items = 0;
}
-inline bool dlist::empty()
+
+/*
+ * Constructor called with the address of a
+ * member of the list (not the list head), and
+ * the address of the link within that member.
+ * If the link is at the beginning of the list member,
+ * then there is no need to specify the link address
+ * since the offset is zero.
+ */
+inline dlist::dlist(void *item, dlink *link)
{
- return head == NULL;
+ init(item, link);
+}
+
+/* Constructor with link at head of item */
+inline dlist::dlist(void) : head(0), tail(0), loffset(0), num_items(0)
+{
+}
+
+inline void dlist::set_prev(void *item, void *prev)
+{
+ ((dlink *)(((char *)item)+loffset))->prev = prev;
+}
+
+inline void dlist::set_next(void *item, void *next)
+{
+ ((dlink *)(((char *)item)+loffset))->next = next;
+}
+
+inline void *dlist::get_prev(void *item)
+{
+ return ((dlink *)(((char *)item)+loffset))->prev;
+}
+
+inline void *dlist::get_next(void *item)
+{
+ return ((dlink *)(((char *)item)+loffset))->next;
}
-
-inline void * dlist::operator new(size_t)
+
+
+inline dlink *dlist::get_link(void *item)
{
- return malloc(sizeof(dlist));
+ return (dlink *)(((char *)item)+loffset);
}
-inline void dlist::operator delete(void *item)
+
+
+inline bool dlist::empty() const
{
- ((dlist *)item)->destroy();
- free(item);
+ return head == NULL;
}
-
-inline void * dlist::first()
+inline int dlist::size() const
+{
+ return num_items;
+}
+
+
+
+inline void * dlist::first() const
{
return head;
}
-inline void * dlist::last()
+inline void * dlist::last() const
{
return tail;
}
+
+/*
+ * C string helper routines for dlist
+ * The string (char *) is kept in the node
+ *
+ * Kern Sibbald, February 2007
+ *
+ */
+class dlistString
+{
+public:
+ char *c_str() { return m_str; };
+ dlink get_link() { return m_link; }; /* eliminate clang compiler warning */
+
+private:
+ dlink m_link;
+ char m_str[1];
+ /* !!! Don't put anything after this as this space is used
+ * to hold the string in inline
+ */
+};
+
+extern dlistString *new_dlistString(const char *str, int len);
+extern dlistString *new_dlistString(const char *str);
projects / bacula / bacula / blobdiff