[libvirt] [PATCH v2 02/20] virlog: Introduce virLogOutputNew

[Erik Skultety]

Continuing with the refactor, in order to later split output parsing and output
defining, introduce a new function which will create a new virLogOutput object
which parser will insert into a list with the list being eventually defined.

Signed-off-by: Erik Skultety <eskultet at redhat.com>
---
 src/libvirt_private.syms |  1 +
 src/util/virlog.c        | 55 +++++++++++++++++++++++++++++++++++++++++++++++-
 src/util/virlog.h        |  6 ++++++
 3 files changed, 61 insertions(+), 1 deletion(-)

diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 35200a3..b5cee5f 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -1854,6 +1854,7 @@ virLogLock;
 virLogMessage;
 virLogOutputFree;
 virLogOutputListFree;
+virLogOutputNew;
 virLogParseAndDefineFilters;
 virLogParseAndDefineOutputs;
 virLogParseDefaultPriority;
diff --git a/src/util/virlog.c b/src/util/virlog.c
index 3ada288..91c63a1 100644
--- a/src/util/virlog.c
+++ b/src/util/virlog.c
@@ -366,7 +366,6 @@ virLogOutputFree(virLogOutputPtr output)
         output->c(output->data);
     VIR_FREE(output->name);
     VIR_FREE(output);
-
 }
 
 
@@ -1551,3 +1550,57 @@ bool virLogProbablyLogMessage(const char *str)
         ret = true;
     return ret;
 }
+
+
+/**
+ * virLogOutputNew:
+ * @f: the function to call to output a message
+ * @c: the function to call to close the output (or NULL)
+ * @data: extra data passed as first arg to the function
+ * @priority: minimal priority for this filter, use 0 for none
+ * @dest: where to send output of this priority (see virLogDestination)
+ * @name: optional name data associated with an output
+ *
+ * Allocates and returns a new log output object. The object has to be later
+ * defined, so that the output will be taken into account when emitting a
+ * message.
+ *
+ * Returns reference to a newly created object or NULL in case of failure.
+ */
+virLogOutputPtr
+virLogOutputNew(virLogOutputFunc f,
+                virLogCloseFunc c,
+                void *data,
+                virLogPriority priority,
+                virLogDestination dest,
+                const char *name)
+{
+    virLogOutputPtr ret = NULL;
+    char *ndup = NULL;
+
+    if (!f)
+        return NULL;
+
+    if (dest == VIR_LOG_TO_SYSLOG || dest == VIR_LOG_TO_FILE) {
+        if (!name)
+            return NULL;
+
+        if (VIR_STRDUP(ndup, name) < 0)
+            return NULL;
+    }
+
+    if (VIR_ALLOC_QUIET(ret) < 0) {
+        VIR_FREE(ndup);
+        return NULL;
+    }
+
+    ret->logInitMessage = true;
+    ret->f = f;
+    ret->c = c;
+    ret->data = data;
+    ret->priority = priority;
+    ret->dest = dest;
+    ret->name = ndup;
+
+    return ret;
+}
diff --git a/src/util/virlog.h b/src/util/virlog.h
index de64f4c..fb32c41 100644
--- a/src/util/virlog.h
+++ b/src/util/virlog.h
@@ -226,5 +226,11 @@ void virLogVMessage(virLogSourcePtr source,
                     va_list vargs) ATTRIBUTE_FMT_PRINTF(7, 0);
 
 bool virLogProbablyLogMessage(const char *str);
+virLogOutputPtr virLogOutputNew(virLogOutputFunc f,
+                                virLogCloseFunc c,
+                                void *data,
+                                virLogPriority priority,
+                                virLogDestination dest,
+                                const char *name);
 
 #endif
-- 
2.5.5