1 files changed, 54 insertions, 1 deletions
diff --git a/libs/util/src/tensor/Shape.cpp b/libs/util/src/tensor/Shape.cpp
index d177d1382..f1de26fdc 100644
--- a/libs/util/src/tensor/Shape.cpp
+++ b/libs/util/src/tensor/Shape.cpp
@@ -16,6 +16,8 @@
 
 #include "util/tensor/Shape.h"
 
+#include <cassert>
+
 namespace nnfw
 {
 namespace util
@@ -32,7 +34,7 @@ bool operator==(const Shape &lhs, const Shape &rhs)
 
   for (size_t axis = 0; axis < lhs.rank(); ++axis)
   {
-    if(lhs.dim(axis) != rhs.dim(axis))
+    if (lhs.dim(axis) != rhs.dim(axis))
     {
       return false;
     }
@@ -41,6 +43,57 @@ bool operator==(const Shape &lhs, const Shape &rhs)
   return true;
 }
 
+Shape Shape::from(const std::string &str)
+{
+  Shape shape(0);
+
+  bool pending = false;
+  int value = 0;
+
+  for (const char *cur = str.c_str(); true; ++cur)
+  {
+    if (*cur == ',' || *cur == '\0')
+    {
+      if (pending)
+      {
+        shape.append(value);
+      }
+
+      if (*cur == '\0')
+      {
+        break;
+      }
+
+      pending = false;
+      value = 0;
+      continue;
+    }
+
+    assert(*cur >= '0' && *cur <= '9');
+
+    pending = true;
+    value *= 10;
+    value += *cur - '0';
+  }
+
+  return shape;
+}
+
+std::ostream &operator<<(std::ostream &os, const Shape &shape)
+{
+  if (shape.rank() > 0)
+  {
+    os << shape.dim(0);
+
+    for (uint32_t axis = 1; axis < shape.rank(); ++axis)
+    {
+      os << "," << shape.dim(axis);
+    }
+  }
+
+  return os;
+}
+
 } // namespace tensor
 } // namespace util
 } // namespace nnfw