commit 526def20a0f38c799b1a2dd78d7e32c49f2120f8
author Julien <julien.cornebise@gmail.com> Wed Dec 12 13:01:24 2012 +0000
committer Julien <julien.cornebise@gmail.com> Wed Dec 12 13:04:21 2012 +0000
tree 1978438cbadd938f5370887f860994fac5cd95fa
parent f0203f5781174cfae6fcd4f8627e07d9766e6798

Allow negative step with range

generic/THTensorMath.c

diff --git a/generic/THTensorMath.c b/generic/THTensorMath.c
index 1a675f7..270a89e 100644
--- a/generic/THTensorMath.c
+++ b/generic/THTensorMath.c
@@ -658,8 +658,8 @@
   long size;
   real i = 0;
 
-  THArgCheck(step > 0, 3, "step must be a positive number");
-  THArgCheck(xmax > xmin, 2, "upper bound must be larger than lower bound");
+  THArgCheck(step > 0 || step < 0, 3, "step must be a non-null number");
+  THArgCheck((step > 0) && (xmax > xmin) || (step < 0) && (xmax < xmin), 2, "upper bound and larger bound incoherent with step sign");
 
   size = (long)((xmax-xmin)/step+1);