From 0aff1bddf19e679549910a3dc2687974321634b7 Mon Sep 17 00:00:00 2001
From: Juan Jose Nicola <juan.nicola@greenbone.net>
Date: Thu, 15 Oct 2020 02:55:18 -0500
Subject: [PATCH] Add function to move a host to the end of the list Allows to
 put a host in the hosts structure at the end of the host list without reset
 the iterator.

---
 CHANGELOG.md |  4 +++-
 base/hosts.c | 33 +++++++++++++++++++++++++++++++++
 base/hosts.h |  3 +++
 3 files changed, 39 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 349e3ea49..d5091873f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,7 +8,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ### Added
 - Use dedicated port list for alive detection (Boreas only) if supplied via OSP. [#391](https://github.com/greenbone/gvm-libs/pull/391)
-- Allow to re allocate the finish flag in the host queue for alive tests. [#407](https://github.com/greenbone/gvm-libs/pull/407)
+- Allow to re allocate the finish flag in the host queue for alive tests.
+  [#407](https://github.com/greenbone/gvm-libs/pull/407)
+  [#410](https://github.com/greenbone/gvm-libs/pull/410)
 
 ### Added
 - Add multiple severities for nvti [#317](https://github.com/greenbone/gvm-libs/pull/317)
diff --git a/base/hosts.c b/base/hosts.c
index cca3e2b48..d5b7458f1 100644
--- a/base/hosts.c
+++ b/base/hosts.c
@@ -1300,6 +1300,39 @@ gvm_hosts_next (gvm_hosts_t *hosts)
   return hosts->hosts[hosts->current++];
 }
 
+/**
+ * @brief Move the current gvm_host_t from a gvm_hosts_t structure to
+ * the end of the hosts list.
+ *
+ * @param[in/out]   hosts     gvm_hosts_t structure which hosts must be
+ * rearange. The hosts->current index points to the last used hosts and
+ * gvm_hosts_next() must be called to get the next host in the list.
+ *
+ */
+void
+gvm_hosts_move_current_host_to_end (gvm_hosts_t *hosts)
+{
+  void *host_tmp;
+  size_t i;
+
+  if (!hosts)// hosts->current == hosts->count)
+    return;
+
+  if (hosts->current == hosts->count)
+    {
+      hosts->current -= 1;
+      return;
+    }
+
+  hosts->current -= 1;
+  host_tmp = hosts->hosts[hosts->current];
+
+  for (i = hosts->current; i < hosts->count; i++)
+    hosts->hosts[i-1] = hosts->hosts[i];
+
+  hosts->hosts[hosts->count - 1] = host_tmp;
+}
+
 /**
  * @brief Frees memory occupied by an gvm_hosts_t structure.
  *
diff --git a/base/hosts.h b/base/hosts.h
index dd6654282..1b2137d56 100644
--- a/base/hosts.h
+++ b/base/hosts.h
@@ -111,6 +111,9 @@ gvm_hosts_new_with_max (const gchar *, unsigned int);
 gvm_host_t *
 gvm_hosts_next (gvm_hosts_t *);
 
+void
+gvm_hosts_move_current_host_to_end (gvm_hosts_t *);
+
 void
 gvm_hosts_free (gvm_hosts_t *);