Implement mkpath

include/utils.hpp

@@ -118,4 +118,6 @@ static inline std::string methodName(const std::string& prettyFunction)
     return prettyFunction.substr(begin,end) + "()";
 }
 
+bool mkpath(std::string path, int mode = 0777);
+
 #endif

src/utils.cpp

@@ -9,6 +9,9 @@
  *
  *  @bug No known bugs
  * */
+
+#include <sys/stat.h>
+
 #include "utils.hpp"
 
 std::string scientific_format(double d, int width, int prec)
@@ -69,3 +72,28 @@ bool arma_vector_close_to(arma::vec &a, arma::vec &b, double tol)
     }
     return true;
 }
+
+bool mkpath(std::string path, int mode)
+{
+    std::string cur_dir;
+    std::string::size_type pos = -1;
+    struct stat buf;
+
+    if (path.back() != '/') {
+        path += '/';
+    }
+    while (true) {
+        pos++;
+        pos = path.find('/', pos);
+        if (pos != std::string::npos) {
+            cur_dir = path.substr(0, pos);
+            if (mkdir(cur_dir.c_str(), mode) != 0 && stat(cur_dir.c_str(), &buf) != 0) {
+                return -1;
+            }
+        }
+        else {
+            break;
+        }
+    }
+    return 0;
+}