Merge pull request pytorch#693 from colesbury/view

Add code for 'view' to THC

Author: soumith

generic/THCTensor.c

@@ -223,6 +223,17 @@ THCTensor *THCTensor_(newUnfold)(THCState *state, THCTensor *tensor, int dimensi
  return self;
 }
 
+THCTensor *THCTensor_(newView)(THCState *state, THCTensor *tensor, THLongStorage *size)
+{
+ THArgCheck(THCTensor_(isContiguous)(state, tensor), 2, "input is not contiguous");
+ ptrdiff_t numel = THCTensor_(nElement)(state, tensor);
+ THCTensor *self = THCTensor_(new)(state);
+ THLongStorage *inferred_size = THLongStorage_newInferSize(size, numel);
+ THCTensor_(setStorage)(state, self, tensor->storage, tensor->storageOffset, inferred_size, NULL);
+ THLongStorage_free(inferred_size);
+ return self;
+}
+
 /* Resize */
 void THCTensor_(resize)(THCState *state, THCTensor *self, THLongStorage *size, THLongStorage *stride)
 {

generic/THCTensor.h

@@ -66,6 +66,8 @@ THC_API THCTensor *THCTensor_(newSelect)(THCState *state, THCTensor *tensor, int
 THC_API THCTensor *THCTensor_(newNarrow)(THCState *state, THCTensor *tensor, int dimension_, long firstIndex_, long size_);
 THC_API THCTensor *THCTensor_(newTranspose)(THCState *state, THCTensor *tensor, int dimension1_, int dimension2_);
 THC_API THCTensor *THCTensor_(newUnfold)(THCState *state, THCTensor *tensor, int dimension_, long size_, long step_);
+THC_API THCTensor *THCTensor_(newView)(THCState *state, THCTensor *tensor, THLongStorage *size);
+
 
 THC_API void THCTensor_(resize)(THCState *state, THCTensor *tensor, THLongStorage *size, THLongStorage *stride);
 THC_API void THCTensor_(resizeAs)(THCState *state, THCTensor *tensor, THCTensor *src);