19July06

[bacula/bacula] / bacula / src / lib / alist.h

diff --git a/bacula/src/lib/alist.h b/bacula/src/lib/alist.h
index 2fb63827d8bef4a293c2598f7de8ae1c19bc1d7d..dcdf809d4f171692008f61035521870a2aa14701 100644 (file)
--- a/bacula/src/lib/alist.h
+++ b/bacula/src/lib/alist.h
@@ -1,52 +1,50 @@
 /*
  *   Version $Id$
+ *
+ *  Kern Sibbald, June MMIII
  */
-
 /*
-   Copyright (C) 2003-2004 Kern Sibbald and John Walker
+   Copyright (C) 2003-2006 Kern Sibbald
 
    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.
+   modify it under the terms of the GNU General Public License
+   version 2 as amended with additional clauses defined in the
+   file LICENSE in the main source directory.
 
    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.
-
-   Kern Sibbald, June MMIII
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 
+   the file LICENSE for additional details.
 
  */
 
-/* 
+
+/*
  * 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_alist(var, list) \
-    for((*((void **)&(var))=(void*)((list)->first())); (var); (*((void **)&(var))=(void*)((list)->next())))
-
-#ifdef the_easy_way
-#define foreach_dlist(var, list) \
-        for((void*(var))=(list)->first(); (var); (void *(var))=(list)->next(var)); )
+        for((var)=(typeof(var))(list)->first(); (var); (var)=(typeof(var))(list)->next() )
+#else
+#define foreach_alist(var, list) \
+    for((*((void **)&(var))=(void*)((list)->first())); \
+         (var); \
+         (*((void **)&(var))=(void*)((list)->next())))
 #endif
 
 
+
 /* Second arg of init */
 enum {
   owned_by_alist = true,
   not_owned_by_alist = false
 };
 
-/* 
+/*
  * Array list -- much like a simplified STL vector
  *   array of pointers to inserted items
  */
@@ -60,6 +58,7 @@ class alist : public SMARTALLOC {
    void grow_list(void);
 public:
    alist(int num = 1, bool own=true);
+   ~alist();
    void init(int num = 1, bool own=true);
    void append(void *item);
    void prepend(void *item);
@@ -74,6 +73,10 @@ public:
    int size() const;
    void destroy();
    void grow(int num);
+
+   /* Use it as a stack, pushing and poping from the end */
+   void push(void *item) { append(item); };
+   void *pop() { return remove(num_items-1); };
 };
 
 inline void * alist::operator [](int index) const {
@@ -85,10 +88,11 @@ inline void * alist::operator [](int index) const {
 
 inline bool alist::empty() const
 {
-   return num_items == 0;
+   /* Check for null pointer */
+   return this ? num_items == 0 : true;
 }
 
-/*                            
+/*
  * This allows us to do explicit initialization,
  *   allowing us to mix C++ classes inside malloc'ed
  *   C structures. Define before called in constructor.
@@ -103,21 +107,29 @@ inline void alist::init(int num, bool own) {
 
 /* Constructor */
 inline alist::alist(int num, bool own) {
-   this->init(num, own);
+   init(num, own);
+}
+
+/* Destructor */
+inline alist::~alist() {
+   destroy();
 }
-   
+
 
 
 /* Current size of list */
-inline int alist::size() const 
+inline int alist::size() const
 {
-   return num_items;
+   /*
+    * Check for null pointer, which allows test
+    *  on size to succeed even if nothing put in
+    *  alist.
+    */
+   return this ? num_items : 0;
 }
 
 /* How much to grow by each time */
-inline void alist::grow(int num) 
+inline void alist::grow(int num)
 {
    num_grow = num;
 }
-
-