[libxml2] Provide new accessors for xmlOutputBuffer

[Daniel Veillard <veillard src gnome org>]

commit e258adecd0e19a6cfe6afa232b89aa416368820e
Author: Daniel Veillard <veillard redhat com>
Date:   Mon Aug 6 11:16:30 2012 +0800

    Provide new accessors for xmlOutputBuffer
    
    To avoid digging into buf->buffer insternal strcuture the two
    new entry points xmlOutputBufferGetContent() and
    xmlOutputBufferGetSize() should make the ode cleaner.
    
    * include/libxml/xmlIO.h: add two new functions
    * xmlIO.c: impement the 2 functions based on the new buffer entry points

 include/libxml/xmlIO.h |    6 ++++++
 xmlIO.c                |   33 +++++++++++++++++++++++++++++++++
 2 files changed, 39 insertions(+), 0 deletions(-)
---
diff --git a/include/libxml/xmlIO.h b/include/libxml/xmlIO.h
index c899f5b..0ccaeaf 100644
--- a/include/libxml/xmlIO.h
+++ b/include/libxml/xmlIO.h
@@ -245,6 +245,12 @@ XMLPUBFUN xmlOutputBufferPtr XMLCALL
 					 void *ioctx,
 					 xmlCharEncodingHandlerPtr encoder);
 
+/* Couple of APIs to get the output without digging into the buffers */
+XMLPUBFUN const xmlChar * XMLCALL
+        xmlOutputBufferGetContent       (xmlOutputBufferPtr out);
+XMLPUBFUN size_t XMLCALL
+        xmlOutputBufferGetSize          (xmlOutputBufferPtr out);
+
 XMLPUBFUN int XMLCALL	
 	xmlOutputBufferWrite		(xmlOutputBufferPtr out,
 					 int len,
diff --git a/xmlIO.c b/xmlIO.c
index 20ec181..53bd8bf 100644
--- a/xmlIO.c
+++ b/xmlIO.c
@@ -2922,6 +2922,39 @@ xmlOutputBufferCreateBuffer(xmlBufferPtr buffer,
     return(ret);
 }
 
+/**
+ * xmlOutputBufferGetContent:
+ * @out:  an xmlOutputBufferPtr
+ *
+ * Gives a pointer to the data currently held in the output buffer
+ *
+ * Returns a pointer to the data or NULL in case of error
+ */
+const xmlChar *
+xmlOutputBufferGetContent(xmlOutputBufferPtr out) {
+    if ((out == NULL) || (out->buffer == NULL))
+        return(NULL);
+
+    return(xmlBufContent(out->buffer));
+}
+
+/**
+ * xmlOutputBufferGetSize:
+ * @out:  an xmlOutputBufferPtr
+ *
+ * Gives the length of the data currently held in the output buffer
+ *
+ * Returns 0 in case or error or no data is held, the size otherwise
+ */
+size_t
+xmlOutputBufferGetSize(xmlOutputBufferPtr out) {
+    if ((out == NULL) || (out->buffer == NULL))
+        return(0);
+
+    return(xmlBufUse(out->buffer));
+}
+
+
 #endif /* LIBXML_OUTPUT_ENABLED */
 
 /**