Implemented external "resolve-include" function

* resolves paths provided as strings against include paths provided through the newly created "--include" argument of the test executable
* this was implemented to enable central collections of XSLT libraries simmilar to how there are C headers in "/usr/include"

2 files changed, 106 insertions, 0 deletions

diff --git a/src/function/resolve_include.cc b/src/function/resolve_include.cc
new file mode 100644
index 0000000..ac4adf5
--- /dev/null
+++ b/src/function/resolve_include.cc
@@ -0,0 +1,62 @@
+#include "resolve_include.h"
+
+#include <algorithm>
+
+#include "support/xalan_string.h"
+
+namespace InputXSLT {
+
+FunctionResolveInclude::FunctionResolveInclude(
+	const std::vector<std::string>& path):
+	path_(new std::vector<FilesystemContext>()) {
+	this->path_->reserve(path.size());
+
+	std::transform(
+		path.begin(),
+		path.end(),
+		std::back_inserter(*this->path_),
+		[](const std::string& path) -> FilesystemContext {
+			return FilesystemContext(path);
+		}
+	);
+}
+
+xalan::XObjectPtr FunctionResolveInclude::execute(
+	xalan::XPathExecutionContext& executionContext,
+	xalan::XalanNode*,
+	const xalan::XObjectPtr parameter,
+	const xalan::Locator*
+) const {
+	const std::string filePath(toString(parameter->str()));
+
+	for ( auto&& context : *this->path_ ) {
+		const boost::filesystem::path resolvedPath(
+			context.resolve(filePath)
+		);
+
+		if ( boost::filesystem::exists(resolvedPath) &&
+		     boost::filesystem::is_regular_file(resolvedPath) ) {
+			return executionContext.getXObjectFactory().createString(
+				toString(resolvedPath.string())
+			);
+		}
+	}
+
+	return executionContext.getXObjectFactory().createString(
+		toString("error")
+	);
+}
+
+FunctionResolveInclude* FunctionResolveInclude::clone(
+	xalan::MemoryManager& manager) const {
+	return xalan::XalanCopyConstruct(manager, *this);
+}
+
+const xalan::XalanDOMString& FunctionResolveInclude::getError(
+	xalan::XalanDOMString& result) const {
+	result.assign("The function expects one parameter of type string.");
+
+	return result;
+}
+
+}
diff --git a/src/function/resolve_include.h b/src/function/resolve_include.h
new file mode 100644
index 0000000..2d6e62f
--- /dev/null
+++ b/src/function/resolve_include.h
@@ -0,0 +1,44 @@
+#ifndef INPUTXSLT_SRC_FUNCTION_RESOLVE_INCLUDE_H_
+#define INPUTXSLT_SRC_FUNCTION_RESOLVE_INCLUDE_H_
+
+#include <xalanc/XPath/XObjectFactory.hpp>
+#include <xalanc/XPath/Function.hpp>
+#include <xalanc/XPath/XObject.hpp>
+
+#include "boost/filesystem.hpp"
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "common.h"
+#include "support/filesystem_context.h"
+
+namespace InputXSLT {
+
+class FunctionResolveInclude : public xalan::Function {
+	public:
+		FunctionResolveInclude(const std::vector<std::string>&);
+
+		virtual xalan::XObjectPtr execute(
+			xalan::XPathExecutionContext&,
+			xalan::XalanNode*,
+			const xalan::XObjectPtr,
+			const xalan::Locator*
+		) const;
+
+		virtual FunctionResolveInclude* clone(xalan::MemoryManager&) const;
+
+		FunctionResolveInclude& operator=(const FunctionResolveInclude&) = delete;
+		bool operator==(const FunctionResolveInclude&) const             = delete;
+
+	private:
+		const std::shared_ptr<std::vector<FilesystemContext>> path_;
+
+		const xalan::XalanDOMString& getError(xalan::XalanDOMString&) const;
+
+};
+
+}
+
+#endif  // INPUTXSLT_SRC_FUNCTION_RESOLVE_INCLUDE_H_