reshape: fix optional order case that failed tests

Signed-off-by: AbdelRauf <rauf@konduit.ai>

libnd4j/include/ops/declarable/generic/shape/reshape.cpp

@@ -61,6 +61,29 @@ DECLARE_TYPES(reshape) {
       ->setSameMode(true);
 }
 
+
+bool handleOptionalOrder(std::vector<int> &reshapeArgs, char &ordering){
+    if(reshapeArgs.size()>0){
+        //check if any optional negative ordering value is passed
+        auto optional = reshapeArgs[0]; 
+        if(optional < 0){
+            optional = abs(optional);
+            //check if passed option is allowed. (-1 -> dynamic shape)
+            // in that case we will return back
+            if(optional == 1 ) return true;
+            //in this case it should obey allowed orderings
+            if (optional != 'c' && optional != 'f' ) return false;
+            reshapeArgs.erase( reshapeArgs.begin());
+            //ordering was passed and ok. let's assign
+            ordering = optional;
+        } 
+
+    }
+    //skipped 
+    return true;
+}
+
+
 DECLARE_SHAPE_FN(reshape) {
 
   const auto x = INPUT_VARIABLE(0);
@@ -78,26 +101,14 @@ DECLARE_SHAPE_FN(reshape) {
    */
   if (block.width() == 1) {
     reshapeArgs = *block.getIArguments();
-    if (!reshapeArgs.empty()) {
-      char potentialOrdering = (char)-reshapeArgs[0];
-      orderNew = potentialOrdering;
-      if (potentialOrdering != 'c' && potentialOrdering != 'f') {
+    if(!handleOptionalOrder(reshapeArgs, orderNew)){
         throw std::runtime_error(
             "reshape:: Value passed in must be -99 or -102 for the ordering if "
             "an int array is present. -99 represents c ordering and -102 "
             "represents f ordering. This number is negative for the long array "
             "case to flag the difference between an ordering and a dimension "
             "being specified.");
-      }
-
-      nd4j_debug("Reshape Ordering is %c int ordering is %d\n", orderNew,
-                 -reshapeArgs[0]);
-
-      if (orderNew == 'c' || orderNew == 'f')
-        reshapeArgs.erase(
-            reshapeArgs
-                .begin()); // remove first element being order in this case
-    }
+      }; 
   } else {
     reshapeArgs = INPUT_VARIABLE(1)->getBufferAsVector<int>();
     if (block.numI() > 0) {