Implemented support for modifying external function base path

* one expects a read-file function to work relative to the directory the transformation is located and not to the executable's location
** from the perspective of the user the transformation is the application, not the actual executable
* removed PlattformGuard struct from TransformerGuard (now TransformerFacade)
* TransformerFacade is instatiated with the appropriate relative working path
** i.e. it will have to be instantiated for every directory containing one or more transformations

1 files changed, 13 insertions, 7 deletions

diff --git a/src/function/read_file.cc b/src/function/read_file.cc
index efc1f61..dcbff25 100644
--- a/src/function/read_file.cc
+++ b/src/function/read_file.cc
@@ -1,7 +1,12 @@
 #include "read_file.h"
 
+#include "utility.h"
+
 namespace InputXSLT {
 
+FunctionReadFile::FunctionReadFile(const std::string& path):
+	path_(path) { }
+
 xalan::XObjectPtr FunctionReadFile::execute(
 	xalan::XPathExecutionContext&                executionContext,
 	xalan::XalanNode*                            context,
@@ -16,20 +21,21 @@ xalan::XObjectPtr FunctionReadFile::execute(
 		generalError(executionContext, context, locator);
 	}
 
-	xalan::CharVectorType fileNameVector;
-	std::string fileNameString;
+	xalan::CharVectorType castHelper;
+	arguments[0]->str().transcode(castHelper);
 
-	arguments[0]->str().transcode(fileNameVector);
+	std::string fileName(this->path_);
+	fileName.reserve(fileName.size() + castHelper.size());
 
 	std::move(
-		fileNameVector.begin(),
-		fileNameVector.end(),
-		fileNameString.begin()
+		castHelper.begin(),
+		castHelper.end(),
+		fileName.end()
 	);
 
 	return executionContext.getXObjectFactory().createString(
 		xalan::XalanDOMString(
-			InputXSLT::readFile(fileNameString).data()
+			InputXSLT::readFile(fileName).data()
 		)
 	);
 }