From d5abfc00dcf2e606fbac6eca78eea06ead233a12 Mon Sep 17 00:00:00 2001
From: Michael Larson <mike@vyatta.com>
Date: Fri, 29 Oct 2010 12:00:45 -0700
Subject: change first, last, firstlast behavior to apply environment setting
 on each action applied. will be used to help resolve problems identified w/
 fw synchronization of rules.

---
 src/commit2.c     | 55 +++++++++++++++++++++++++++++++++++++++----------------
 src/common/defs.h | 10 ++++++++++
 2 files changed, 49 insertions(+), 16 deletions(-)

diff --git a/src/commit2.c b/src/commit2.c
index 1679d76..6a6a211 100644
--- a/src/commit2.c
+++ b/src/commit2.c
@@ -415,6 +415,7 @@ process_func(GNode *node, gpointer data)
   gpointer gp = ((GNode*)node)->data;
   struct Config *c = &((struct VyattaNode*)gp)->_config;
   struct Data *d = &((struct VyattaNode*)gp)->_data;
+  struct Aux *a = &((struct VyattaNode*)gp)->_aux;
   NODE_OPERATION op = d->_operation;
 
   int status = 0;
@@ -523,27 +524,14 @@ process_func(GNode *node, gpointer data)
       //set location env
       setenv(ENV_DATA_PATH,d->_path,1);
 
-      //do first/last/only sibling check, restrict to nodes with operations defined
-      GNode *n_last_op = NULL;
-      GNode *n_first_op = NULL;
 
-      GNode *sib = g_node_first_sibling(node);
-      while (sib != NULL) {
-	if (!IS_NOOP(((struct VyattaNode*)(sib->data))->_data._operation)) {
-	  if (n_first_op == NULL) {
-	    n_first_op = sib;
-	  }
-	  n_last_op = sib;
-	}
-	sib = sib->next;
-      }
-      if (n_last_op != NULL && n_first_op != NULL && node == n_first_op && node == n_last_op) {
+      if (a->_first && a->_last) {
 	setenv(ENV_SIBLING_POSITION,"FIRSTLAST",1);
       }
-      else if (n_first_op != NULL && node == n_first_op) {
+      else if (a->_first) {
 	setenv(ENV_SIBLING_POSITION,"FIRST",1);
       }
-      else if (n_last_op != NULL && node == n_last_op) {
+      else if (a->_last) {
 	setenv(ENV_SIBLING_POSITION,"LAST",1);
       }
 
@@ -1251,8 +1239,43 @@ validate_func(GNode *node, gpointer data)
   gpointer gp = ((GNode*)node)->data;
   struct Config *c = &((struct VyattaNode*)gp)->_config;
   struct Data *d = &((struct VyattaNode*)gp)->_data;
+  struct Aux *a = &((struct VyattaNode*)gp)->_aux;
   struct Result *result = (struct Result*)data;
 
+
+
+
+  //let's mark first last nodes here for use later
+  //do first/last/only sibling check, restrict to nodes with operations defined
+  GNode *n_last_op = NULL;
+  GNode *n_first_op = NULL;
+  
+  GNode *sib = g_node_first_sibling(node);
+  while (sib != NULL) {
+    if (IS_DELETE(((struct VyattaNode*)(sib->data))->_data._operation)) {
+      if (n_first_op == NULL) {
+	n_first_op = sib;
+      }
+      n_last_op = sib;
+    }
+    sib = sib->next;
+  }
+
+  sib = g_node_first_sibling(node);
+  while (sib != NULL) {
+    if (IS_SET_OR_CREATE(((struct VyattaNode*)(sib->data))->_data._operation)) {
+      if (n_first_op == NULL) {
+	n_first_op = sib;
+      }
+      n_last_op = sib;
+    }
+    sib = sib->next;
+  }
+
+  a->_first = (node == n_first_op);
+  a->_last = (node == n_last_op);
+
+
   //since this visits all working nodes, let's maintain a set of nodes to commit
   GSList *coll = (GSList*)result->_data;
   if (d->_path != NULL) {
diff --git a/src/common/defs.h b/src/common/defs.h
index dcced15..b931bd9 100644
--- a/src/common/defs.h
+++ b/src/common/defs.h
@@ -85,10 +85,20 @@ struct Data
   NODE_ACTIVATE   _disable_op; //is this node currently deactivated?
 };
 
+/*
+ * additional data to be defined and used by client
+ */
+struct Aux
+{
+  boolean        _first;
+  boolean        _last;
+};
+
 struct VyattaNode
 {
   struct Data   _data;
   struct Config _config;
+  struct Aux    _aux;
 };
 
 #endif //__DEFS_H__
-- 
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