add exslt support

.gitignore

@@ -14,4 +14,5 @@ mkmf.log
 cross
 tags
 stash
+.rake_tasks
 

ext/nokogiri/extconf.rb

@@ -34,7 +34,13 @@
                '/opt/local/lib',
                '/usr/local/lib',
                '/usr/lib'
-              )
+    )
+  find_library('exslt', 'exsltFuncRegister',
+               LIBDIR,
+               '/opt/local/lib',
+               '/usr/local/lib',
+               '/usr/lib'
+    )
 end
 
 
@@ -70,6 +76,14 @@
                     )
     abort "need libxslt"
   end
+  unless find_header('libexslt/exslt.h',
+                     INCLUDEDIR,
+                     '/usr/include',
+                     '/opt/local/include',
+                     '/usr/local/include'
+                    )
+    abort "need libxslt"
+  end
 
   version = try_constant('LIBXML_VERSION', 'libxml/xmlversion.h')
 end

ext/nokogiri/xslt_stylesheet.c

@@ -3,6 +3,7 @@
 #include <libxslt/xsltInternals.h>
 #include <libxslt/xsltutils.h>
 #include <libxslt/transform.h>
+#include <libexslt/exslt.h>
 
 static void dealloc(xsltStylesheetPtr doc)
 {
@@ -22,6 +23,7 @@ static VALUE parse_stylesheet_doc(VALUE klass, VALUE xmldocobj)
     xmlDocPtr xml ;
     xsltStylesheetPtr ss ;
     Data_Get_Struct(xmldocobj, xmlDoc, xml);
+    exsltRegisterAll();
     ss = xsltParseStylesheetDoc(xmlCopyDoc(xml, 1)); /* 1 => recursive */
     return Data_Wrap_Struct(klass, NULL, dealloc, ss);
 }

test/helper.rb

@@ -12,6 +12,8 @@ class TestCase < Test::Unit::TestCase
     ASSETS_DIR = File.join(File.dirname(__FILE__), 'files')
     XML_FILE = File.join(ASSETS_DIR, 'staff.xml')
     XSLT_FILE = File.join(ASSETS_DIR, 'staff.xslt')
+    EXSLT_FILE = File.join(ASSETS_DIR, 'exslt.xslt')
+    EXML_FILE = File.join(ASSETS_DIR, 'exslt.xml')
     HTML_FILE = File.join(ASSETS_DIR, 'tlm.html')
 
     unless RUBY_VERSION >= '1.9'

test/test_xslt_transforms.rb

@@ -26,4 +26,19 @@ def test_transform
     assert result = style.apply_to(doc)
     assert_match %r{<h1></h1>}, result
   end
+
+  def test_exslt
+    assert doc = Nokogiri::XML.parse(File.read(EXML_FILE))
+    assert doc.xml?
+
+    assert style = Nokogiri::XSLT.parse(File.read(EXSLT_FILE))
+    result_doc = Nokogiri::XML.parse(style.apply_to(doc))
+
+    assert_equal 'func-result', result_doc.at('/root/function').content
+    assert_equal 3, result_doc.at('/root/max').content.to_i
+    assert_match(
+      /\d{4}-\d\d-\d\d-\d\d:\d\d/, 
+      result_doc.at('/root/date').content
+      )
+  end
 end