Implemented external "generate" function

* this function essentially provides the same functionality as FunctionTransform with the addition of directly committing the result to the filesystem
** this is needed if one wants to generate doctype-containing transformations from inside a transformation as "write-file" is not able to infer the doctype of a given xalan::XalanNode pointer
** this is a integral limitation of (at least) XSLT 1.0 as implemented in Apache Xalan
*** a document can of course only have a single document type
*** e.g. we can not include a doctype node in the result tree of FunctionTransform
* implemented test case for FunctionGenerate
* transformation "test.xsl" is shared between the FunctionTransform and FunctionGenerate test cases
* modified README.md accordingly

1 files changed, 7 insertions, 0 deletions

diff --git a/src/plattform_guard.cc b/src/plattform_guard.cc
index cc3c9c0..5d19e32 100644
--- a/src/plattform_guard.cc
+++ b/src/plattform_guard.cc
@@ -10,6 +10,7 @@
 #include "function/write_file.h"
 #include "function/read_directory.h"
 #include "function/transform.h"
+#include "function/generate.h"
 #include "function/external_text_formatter.h"
 
 namespace InputXSLT {
@@ -49,6 +50,12 @@ PlattformGuard::PlattformGuard(const std::vector<std::string>& path):
 
 	xalan::XalanTransformer::installExternalFunctionGlobal(
 		customNamespace,
+		xalan::XalanDOMString("generate"),
+		InputXSLT::FunctionGenerate(&this->include_resolver_)
+	);
+
+	xalan::XalanTransformer::installExternalFunctionGlobal(
+		customNamespace,
 		xalan::XalanDOMString("external-text-formatter"),
 		InputXSLT::FunctionExternalTextFormatter(&this->include_resolver_)
 	);