Implemented basic external "execute" function

* enables execution of external programs
** second parameter is passed to stdin
** stdout is captured and returned
** based on booost::process
* this was implemented to enable access to external content preprocessors such as markdown

1 files changed, 28 insertions, 0 deletions

diff --git a/src/function/execute.h b/src/function/execute.h
new file mode 100644
index 0000000..12167da
--- /dev/null
+++ b/src/function/execute.h
@@ -0,0 +1,28 @@
+#ifndef INPUTXSLT_SRC_FUNCTION_EXECUTE_H_
+#define INPUTXSLT_SRC_FUNCTION_EXECUTE_H_
+
+#include "base.h"
+
+namespace InputXSLT {
+
+class FunctionExecute : public FunctionBase<
+	FunctionExecute,
+	std::string,
+	std::string
+> {
+	public:
+		using FunctionBase::FunctionBase;
+
+	protected:
+		friend FunctionBase;
+
+		xercesc::DOMDocument* constructDocument(
+			const FilesystemContext&,
+			const FunctionBase::parameter_tuple&
+		);
+
+};
+
+}
+
+#endif  // INPUTXSLT_SRC_FUNCTION_EXECUTE_H_