1 files changed, 42 insertions, 0 deletions
diff --git a/src/boost-utils.cc b/src/boost-utils.cc
new file mode 100644
index 0000000..f81917a
--- /dev/null
+++ b/src/boost-utils.cc
@@ -0,0 +1,42 @@
+#include "boost-utils.h"
+#include <stdio.h>
+#include <iostream>
+
+fs::path relativePath(const fs::path &path, const fs::path &relative_to)
+{
+	// create absolute paths
+	fs::path p = fs::absolute(path);
+	fs::path r = fs::absolute(relative_to);
+	
+	// if root paths are different, return absolute path
+	if (p.root_path() != r.root_path())
+		return p;
+	
+	// initialize relative path
+	fs::path result;
+	
+	// find out where the two paths diverge
+	fs::path::const_iterator itr_path = p.begin();
+	fs::path::const_iterator itr_relative_to = r.begin();
+	while (*itr_path == *itr_relative_to && itr_path != p.end() && itr_relative_to != r.end()) {
+		++itr_path;
+		++itr_relative_to;
+	}
+	
+	// add "../" for each remaining token in relative_to
+	if (itr_relative_to != r.end()) {
+		++itr_relative_to;
+		while (itr_relative_to != r.end()) {
+			result /= "..";
+			++itr_relative_to;
+		}
+	}
+	
+	// add remaining path
+	while (itr_path != p.end()) {
+		result /= *itr_path;
+		++itr_path;
+	}
+	
+	return result;
+}