From 1d3d9dfb7b11da8e398f6f9c638291a0539f7bf0 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Wed, 27 Mar 2013 08:00:25 +0200
Subject: Add attribute_present() function to XML parser

---
 cutl/xml/parser.cxx | 21 +++++++++++++++++++++
 cutl/xml/parser.hxx |  6 ++++++
 cutl/xml/parser.ixx |  6 ++++++
 3 files changed, 33 insertions(+)

(limited to 'cutl/xml')

diff --git a/cutl/xml/parser.cxx b/cutl/xml/parser.cxx
index f57d9fd..42ce9ce 100644
--- a/cutl/xml/parser.cxx
+++ b/cutl/xml/parser.cxx
@@ -237,6 +237,27 @@ namespace cutl
       return dv;
     }
 
+    bool parser::
+    attribute_present (const qname_type& qn) const
+    {
+      if (const element_entry* e = get_element ())
+      {
+        attribute_map::const_iterator i (e->attr_map_.find (qn));
+
+        if (i != e->attr_map_.end ())
+        {
+          if (!i->second.handled)
+          {
+            i->second.handled = true;
+            e->attr_unhandled_--;
+          }
+          return true;
+        }
+      }
+
+      return false;
+    }
+
     void parser::
     next_expect (event_type e)
     {
diff --git a/cutl/xml/parser.hxx b/cutl/xml/parser.hxx
index 8aed55f..7806041 100644
--- a/cutl/xml/parser.hxx
+++ b/cutl/xml/parser.hxx
@@ -249,6 +249,12 @@ namespace cutl
       T
       attribute (const qname_type& qname, const T& dv) const;
 
+      bool
+      attribute_present (const std::string& name) const;
+
+      bool
+      attribute_present (const qname_type& qname) const;
+
       // Optional content processing.
       //
     public:
diff --git a/cutl/xml/parser.ixx b/cutl/xml/parser.ixx
index fa5a7b6..2bedae4 100644
--- a/cutl/xml/parser.ixx
+++ b/cutl/xml/parser.ixx
@@ -41,6 +41,12 @@ namespace cutl
       return value_traits<T>::parse (attribute (qn), *this);
     }
 
+    inline bool parser::
+    attribute_present (const std::string& n) const
+    {
+      return attribute_present (qname_type (n));
+    }
+
     inline void parser::
     next_expect (event_type e, const qname_type& qn)
     {
-- 
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