Changed external functions to enable global installation

* up until now all external functions were locally installed to a specific XalanTransformer instance contained within a TransformationGuard instance
** this had to change as I planned to add a "execute-transformation" function based on TransformationGuard which would have led to recursive self-instantiation
** global external functions have to be thread-safe
* as global external function can not be provided with a reference to a transformation-specific FilesystemFacade instance, the working path is now determined using xalan::Locator
** currently using pointer arithmetics on XMLCh* to remove the "file://" prefix of the URI returned by locator->getSystemId(), may be unsafe
* added compilation unit for PlattformGuard as it now contains function installation in addition to plattform lifetime management

1 files changed, 1 insertions, 3 deletions

diff --git a/src/function/read_directory.h b/src/function/read_directory.h
index f4f7ec8..02a0305 100644
--- a/src/function/read_directory.h
+++ b/src/function/read_directory.h
@@ -9,14 +9,13 @@
 #include <memory>
 
 #include "common.h"
-#include "support/filesystem_context.h"
 #include "support/dom/document_cache.h"
 
 namespace InputXSLT {
 
 class FunctionReadDirectory : public xalan::Function {
 	public:
-		FunctionReadDirectory(const FilesystemContext&);
+		FunctionReadDirectory();
 
 		virtual xalan::XObjectPtr execute(
 			xalan::XPathExecutionContext&,
@@ -31,7 +30,6 @@ class FunctionReadDirectory : public xalan::Function {
 		bool operator==(const FunctionReadDirectory&) const            = delete;
 
 	private:
-		const FilesystemContext& fs_context_;
 		std::shared_ptr<DomDocumentCache> document_cache_;
 
 		const xalan::XalanDOMString& getError(xalan::XalanDOMString&) const;