[libxml2] Fix some potential problems on reallocation failures

[Daniel Veillard <veillard src gnome org>]

commit d7958b21e7f8c447a26bb2436f08402b2c308be4
Author: Chris Evans <scarybeasts gmail com>
Date:   Wed Mar 23 08:13:06 2011 +0800

    Fix some potential problems on reallocation failures
    
    The count was incremented before the allocation
    and not fixed in case of failure
    * xpath.c: corrects a few instances where the available count of some
               structure is updated before we know the allocation actually
               succeeds

 xpath.c |   20 ++++++++++----------
 1 files changed, 10 insertions(+), 10 deletions(-)
---
diff --git a/xpath.c b/xpath.c
index 8b56189..608fe00 100644
--- a/xpath.c
+++ b/xpath.c
@@ -3522,13 +3522,13 @@ xmlXPathNodeSetAddNs(xmlNodeSetPtr cur, xmlNodePtr node, xmlNsPtr ns) {
     } else if (cur->nodeNr == cur->nodeMax) {
         xmlNodePtr *temp;
 
-        cur->nodeMax *= 2;
-	temp = (xmlNodePtr *) xmlRealloc(cur->nodeTab, cur->nodeMax *
+	temp = (xmlNodePtr *) xmlRealloc(cur->nodeTab, cur->nodeMax * 2 *
 				      sizeof(xmlNodePtr));
 	if (temp == NULL) {
 	    xmlXPathErrMemory(NULL, "growing nodeset\n");
 	    return;
 	}
+        cur->nodeMax *= 2;
 	cur->nodeTab = temp;
     }
     cur->nodeTab[cur->nodeNr++] = xmlXPathNodeSetDupNs(node, ns);
@@ -3627,14 +3627,14 @@ xmlXPathNodeSetAddUnique(xmlNodeSetPtr cur, xmlNodePtr val) {
     } else if (cur->nodeNr == cur->nodeMax) {
         xmlNodePtr *temp;
 
-        cur->nodeMax *= 2;
-	temp = (xmlNodePtr *) xmlRealloc(cur->nodeTab, cur->nodeMax *
+	temp = (xmlNodePtr *) xmlRealloc(cur->nodeTab, cur->nodeMax * 2 *
 				      sizeof(xmlNodePtr));
 	if (temp == NULL) {
 	    xmlXPathErrMemory(NULL, "growing nodeset\n");
 	    return;
 	}
 	cur->nodeTab = temp;
+        cur->nodeMax *= 2;
     }
     if (val->type == XML_NAMESPACE_DECL) {
 	xmlNsPtr ns = (xmlNsPtr) val;
@@ -3738,14 +3738,14 @@ xmlXPathNodeSetMerge(xmlNodeSetPtr val1, xmlNodeSetPtr val2) {
 	} else if (val1->nodeNr == val1->nodeMax) {
 	    xmlNodePtr *temp;
 
-	    val1->nodeMax *= 2;
-	    temp = (xmlNodePtr *) xmlRealloc(val1->nodeTab, val1->nodeMax *
+	    temp = (xmlNodePtr *) xmlRealloc(val1->nodeTab, val1->nodeMax * 2 *
 					     sizeof(xmlNodePtr));
 	    if (temp == NULL) {
 	        xmlXPathErrMemory(NULL, "merging nodeset\n");
 		return(NULL);
 	    }
 	    val1->nodeTab = temp;
+	    val1->nodeMax *= 2;
 	}
 	if (n2->type == XML_NAMESPACE_DECL) {
 	    xmlNsPtr ns = (xmlNsPtr) n2;
@@ -3907,14 +3907,14 @@ xmlXPathNodeSetMergeAndClear(xmlNodeSetPtr set1, xmlNodeSetPtr set2,
 	    } else if (set1->nodeNr >= set1->nodeMax) {
 		xmlNodePtr *temp;
 
-		set1->nodeMax *= 2;
 		temp = (xmlNodePtr *) xmlRealloc(
-		    set1->nodeTab, set1->nodeMax * sizeof(xmlNodePtr));
+		    set1->nodeTab, set1->nodeMax * 2 * sizeof(xmlNodePtr));
 		if (temp == NULL) {
 		    xmlXPathErrMemory(NULL, "merging nodeset\n");
 		    return(NULL);
 		}
 		set1->nodeTab = temp;
+		set1->nodeMax *= 2;
 	    }
 	    if (n2->type == XML_NAMESPACE_DECL) {
 		xmlNsPtr ns = (xmlNsPtr) n2;
@@ -3991,14 +3991,14 @@ xmlXPathNodeSetMergeAndClearNoDupls(xmlNodeSetPtr set1, xmlNodeSetPtr set2,
 	    } else if (set1->nodeNr >= set1->nodeMax) {
 		xmlNodePtr *temp;
 
-		set1->nodeMax *= 2;
 		temp = (xmlNodePtr *) xmlRealloc(
-		    set1->nodeTab, set1->nodeMax * sizeof(xmlNodePtr));
+		    set1->nodeTab, set1->nodeMax * 2 * sizeof(xmlNodePtr));
 		if (temp == NULL) {
 		    xmlXPathErrMemory(NULL, "merging nodeset\n");
 		    return(NULL);
 		}
 		set1->nodeTab = temp;
+		set1->nodeMax *= 2;
 	    }
 	    set1->nodeTab[set1->nodeNr++] = n2;
 	}