Replace H5Sselect_adjust_u() and H5Shyper_adjust_s() with

H5Sselect_adjust.  Implement "adjust_s" callback for all selection
types.  Add range checking to H5Sselect_adjust().

9 files changed, 210 insertions, 60 deletions

diff --git a/src/H5Dchunk.c b/src/H5Dchunk.c
index 7b1c587..b2e1a24 100644
--- a/src/H5Dchunk.c
+++ b/src/H5Dchunk.c
@@ -2116,7 +2116,7 @@ H5D__create_chunk_mem_map_hyper(const H5D_chunk_map_t *fm)
                 } /* end for */
 
                 /* Adjust the selection */
-                if(H5S_hyper_adjust_s(chunk_info->mspace, chunk_adjust) < 0)
+                if(H5S_SELECT_ADJUST_S(chunk_info->mspace, chunk_adjust) < 0)
                     HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "unable to adjust selection")
             } /* end else */
 
@@ -2129,7 +2129,6 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__create_chunk_mem_map_hyper() */
 
-
 
 /*-------------------------------------------------------------------------
  * Function:	H5D__create_mem_map_1d
diff --git a/src/H5Sall.c b/src/H5Sall.c
index 9d0a65a..4a4245d 100644
--- a/src/H5Sall.c
+++ b/src/H5Sall.c
@@ -66,6 +66,7 @@ static htri_t H5S__all_shape_same(const H5S_t *space1, const H5S_t *space2);
 static htri_t H5S__all_intersect_block(const H5S_t *space, const hsize_t *start,
     const hsize_t *end);
 static herr_t H5S__all_adjust_u(H5S_t *space, const hsize_t *offset);
+static herr_t H5S__all_adjust_s(H5S_t *space, const hssize_t *offset);
 static herr_t H5S__all_project_scalar(const H5S_t *space, hsize_t *offset);
 static herr_t H5S__all_project_simple(const H5S_t *space, H5S_t *new_space, hsize_t *offset);
 static herr_t H5S__all_iter_init(const H5S_t *space, H5S_sel_iter_t *iter);
@@ -112,6 +113,7 @@ const H5S_select_class_t H5S_sel_all[1] = {{
     H5S__all_shape_same,
     H5S__all_intersect_block,
     H5S__all_adjust_u,
+    H5S__all_adjust_s,
     H5S__all_project_scalar,
     H5S__all_project_simple,
     H5S__all_iter_init,
@@ -1043,6 +1045,37 @@ H5S__all_adjust_u(H5S_t H5_ATTR_UNUSED *space, const hsize_t H5_ATTR_UNUSED *off
 } /* end H5S__all_adjust_u() */
 
 
+/*--------------------------------------------------------------------------
+ NAME
+    H5S__all_adjust_s
+ PURPOSE
+    Adjust an "all" selection by subtracting an offset
+ USAGE
+    herr_t H5S__all_adjust_u(space, offset)
+        H5S_t *space;           IN/OUT: Pointer to dataspace to adjust
+        const hssize_t *offset; IN: Offset to subtract
+ RETURNS
+    Non-negative on success, negative on failure
+ DESCRIPTION
+    Moves selection by subtracting an offset from it.
+ GLOBAL VARIABLES
+ COMMENTS, BUGS, ASSUMPTIONS
+ EXAMPLES
+ REVISION LOG
+--------------------------------------------------------------------------*/
+static herr_t
+H5S__all_adjust_s(H5S_t H5_ATTR_UNUSED *space, const hssize_t H5_ATTR_UNUSED *offset)
+{
+    FUNC_ENTER_STATIC_NOERR
+
+    /* Check args */
+    HDassert(space);
+    HDassert(offset);
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5S__all_adjust_s() */
+
+
 /*-------------------------------------------------------------------------
  * Function:	H5S__all_project_scalar
  *
diff --git a/src/H5Shyper.c b/src/H5Shyper.c
index 2c7502a..a76812d 100644
--- a/src/H5Shyper.c
+++ b/src/H5Shyper.c
@@ -194,6 +194,7 @@ static htri_t H5S__hyper_shape_same(const H5S_t *space1, const H5S_t *space2);
 static htri_t H5S__hyper_intersect_block(const H5S_t *space, const hsize_t *start,
     const hsize_t *end);
 static herr_t H5S__hyper_adjust_u(H5S_t *space, const hsize_t *offset);
+static herr_t H5S__hyper_adjust_s(H5S_t *space, const hssize_t *offset);
 static herr_t H5S__hyper_project_scalar(const H5S_t *space, hsize_t *offset);
 static herr_t H5S__hyper_project_simple(const H5S_t *space, H5S_t *new_space, hsize_t *offset);
 static herr_t H5S__hyper_iter_init(const H5S_t *space, H5S_sel_iter_t *iter);
@@ -240,6 +241,7 @@ const H5S_select_class_t H5S_sel_hyper[1] = {{
     H5S__hyper_shape_same,
     H5S__hyper_intersect_block,
     H5S__hyper_adjust_u,
+    H5S__hyper_adjust_s,
     H5S__hyper_project_scalar,
     H5S__hyper_project_simple,
     H5S__hyper_iter_init,
@@ -6980,11 +6982,11 @@ H5S__hyper_adjust_s_helper(H5S_hyper_span_info_t *spans, unsigned rank,
 
 /*--------------------------------------------------------------------------
  NAME
-    H5S_hyper_adjust_s
+    H5S__hyper_adjust_s
  PURPOSE
     Adjust a hyperslab selection by subtracting an offset
  USAGE
-    herr_t H5S_hyper_adjust_s(space,offset)
+    herr_t H5S__hyper_adjust_s(space,offset)
         H5S_t *space;           IN/OUT: Pointer to dataspace to adjust
         const hssize_t *offset; IN: Offset to subtract
  RETURNS
@@ -6996,8 +6998,8 @@ H5S__hyper_adjust_s_helper(H5S_hyper_span_info_t *spans, unsigned rank,
  EXAMPLES
  REVISION LOG
 --------------------------------------------------------------------------*/
-herr_t
-H5S_hyper_adjust_s(H5S_t *space, const hssize_t *offset)
+static herr_t
+H5S__hyper_adjust_s(H5S_t *space, const hssize_t *offset)
 {
     hbool_t non_zero_offset = FALSE;    /* Whether any offset is non-zero */
     unsigned u;                         /* Local index variable */
@@ -7048,48 +7050,7 @@ H5S_hyper_adjust_s(H5S_t *space, const hssize_t *offset)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5S_hyper_adjust_s() */
-
-/*--------------------------------------------------------------------------
- NAME
-    H5Shyper_adjust_s
- PURPOSE
-    Adjust a hyperslab selection by subtracting an offset
- USAGE
-    herr_t H5Shyper_adjust_s(space_id,offset)
-        hid_t space_id;         IN: ID of the dataspace to adjust
-        const hssize_t *offset; IN: Offset to subtract
- RETURNS
-    Non-negative on success, negative on failure
- DESCRIPTION
-    Moves a hyperslab selection by subtracting an offset from it.
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
- EXAMPLES
- REVISION LOG
---------------------------------------------------------------------------*/
-herr_t
-H5Shyper_adjust_s(hid_t space_id, const hssize_t *offset)
-{
-    H5S_t *space;
-    herr_t ret_value = SUCCEED;         /* Return value */
-
-    FUNC_ENTER_API(FAIL)
-    H5TRACE2("e", "i*Hs", space_id, offset);
-
-    if(NULL == (space = (H5S_t *)H5I_object_verify(space_id, H5I_DATASPACE)))
-        HGOTO_ERROR(H5E_DATASPACE, H5E_BADTYPE, FAIL, "not a dataspace")
-    if(H5S_GET_SELECT_TYPE(space) != H5S_SEL_HYPERSLABS)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a hyperslab selection")
-    if(NULL == offset)
-        HGOTO_ERROR(H5E_DATASPACE, H5E_BADTYPE, FAIL, "NULL offset pointer")
-
-    if(H5S_hyper_adjust_s(space, offset) < 0)
-        HGOTO_ERROR(H5E_DATASPACE, H5E_CANTSET, FAIL, "can't adjust selection")
-
-done:
-    FUNC_LEAVE_API(ret_value)
-} /* end H5Shyper_adjust_s() */
+} /* end H5S__hyper_adjust_s() */
 
 
 /*--------------------------------------------------------------------------
@@ -7135,7 +7096,7 @@ H5S_hyper_normalize_offset(H5S_t *space, hssize_t *old_offset)
         } /* end for */
 
         /* Call the 'adjust' routine */
-        if(H5S_hyper_adjust_s(space, space->select.offset) < 0)
+        if(H5S__hyper_adjust_s(space, space->select.offset) < 0)
             HGOTO_ERROR(H5E_DATASPACE, H5E_CANTSET, FAIL, "can't adjust selection")
 
         /* Zero out the selection offset */
@@ -7183,7 +7144,7 @@ H5S_hyper_denormalize_offset(H5S_t *space, const hssize_t *old_offset)
     HDassert(H5S_GET_SELECT_TYPE(space) == H5S_SEL_HYPERSLABS);
 
     /* Call the 'adjust' routine */
-    if(H5S_hyper_adjust_s(space, old_offset) < 0)
+    if(H5S__hyper_adjust_s(space, old_offset) < 0)
         HGOTO_ERROR(H5E_DATASPACE, H5E_CANTSET, FAIL, "can't adjust selection")
 
     /* Copy the selection offset over */
diff --git a/src/H5Snone.c b/src/H5Snone.c
index c262d18..0949b2a 100644
--- a/src/H5Snone.c
+++ b/src/H5Snone.c
@@ -66,6 +66,7 @@ static htri_t H5S__none_shape_same(const H5S_t *space1, const H5S_t *space2);
 static htri_t H5S__none_intersect_block(const H5S_t *space, const hsize_t *start,
     const hsize_t *end);
 static herr_t H5S__none_adjust_u(H5S_t *space, const hsize_t *offset);
+static herr_t H5S__none_adjust_s(H5S_t *space, const hssize_t *offset);
 static herr_t H5S__none_project_scalar(const H5S_t *space, hsize_t *offset);
 static herr_t H5S__none_project_simple(const H5S_t *space, H5S_t *new_space,
     hsize_t *offset);
@@ -113,6 +114,7 @@ const H5S_select_class_t H5S_sel_none[1] = {{
     H5S__none_shape_same,
     H5S__none_intersect_block,
     H5S__none_adjust_u,
+    H5S__none_adjust_s,
     H5S__none_project_scalar,
     H5S__none_project_simple,
     H5S__none_iter_init,
@@ -954,6 +956,37 @@ H5S__none_adjust_u(H5S_t H5_ATTR_UNUSED *space, const hsize_t H5_ATTR_UNUSED *of
 } /* end H5S__none_adjust_u() */
 
 
+/*--------------------------------------------------------------------------
+ NAME
+    H5S__none_adjust_s
+ PURPOSE
+    Adjust an "none" selection by subtracting an offset
+ USAGE
+    herr_t H5S__none_adjust_u(space, offset)
+        H5S_t *space;           IN/OUT: Pointer to dataspace to adjust
+        const hssize_t *offset; IN: Offset to subtract
+ RETURNS
+    Non-negative on success, negative on failure
+ DESCRIPTION
+    Moves selection by subtracting an offset from it.
+ GLOBAL VARIABLES
+ COMMENTS, BUGS, ASSUMPTIONS
+ EXAMPLES
+ REVISION LOG
+--------------------------------------------------------------------------*/
+static herr_t
+H5S__none_adjust_s(H5S_t H5_ATTR_UNUSED *space, const hssize_t H5_ATTR_UNUSED *offset)
+{
+    FUNC_ENTER_STATIC_NOERR
+
+    /* Check args */
+    HDassert(space);
+    HDassert(offset);
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5S__none_adjust_s() */
+
+
 /*-------------------------------------------------------------------------
  * Function:	H5S__none_project_scalar
  *
diff --git a/src/H5Spkg.h b/src/H5Spkg.h
index 6809643..ba60cbf 100644
--- a/src/H5Spkg.h
+++ b/src/H5Spkg.h
@@ -261,6 +261,8 @@ typedef htri_t (*H5S_sel_shape_same_func_t)(const H5S_t *space1, const H5S_t *sp
 typedef htri_t (*H5S_sel_intersect_block_func_t)(const H5S_t *space, const hsize_t *start, const hsize_t *end);
 /* Method to adjust a selection by an offset */
 typedef herr_t (*H5S_sel_adjust_u_func_t)(H5S_t *space, const hsize_t *offset);
+/* Method to adjust a selection by an offset (signed) */
+typedef herr_t (*H5S_sel_adjust_s_func_t)(H5S_t *space, const hssize_t *offset);
 /* Method to construct single element projection onto scalar dataspace */
 typedef herr_t (*H5S_sel_project_scalar)(const H5S_t *space, hsize_t *offset);
 /* Method to construct selection projection onto/into simple dataspace */
@@ -289,6 +291,7 @@ typedef struct {
     H5S_sel_shape_same_func_t shape_same;       /* Method to determine if two dataspaces' selections are the same shape */
     H5S_sel_intersect_block_func_t intersect_block; /* Method to determine if a dataspaces' selection intersects a block */
     H5S_sel_adjust_u_func_t adjust_u;           /* Method to adjust a selection by an offset */
+    H5S_sel_adjust_s_func_t adjust_s;           /* Method to adjust a selection by an offset (signed) */
     H5S_sel_project_scalar project_scalar;      /* Method to construct scalar dataspace projection */
     H5S_sel_project_simple project_simple;      /* Method to construct simple dataspace projection */
     H5S_sel_iter_init_func_t iter_init;         /* Method to initialize iterator for current selection */
diff --git a/src/H5Spoint.c b/src/H5Spoint.c
index ea6c9c5..d501a4a 100644
--- a/src/H5Spoint.c
+++ b/src/H5Spoint.c
@@ -78,7 +78,8 @@ static htri_t H5S__point_shape_same(const H5S_t *space1, const H5S_t *space2);
 static htri_t H5S__point_intersect_block(const H5S_t *space, const hsize_t *start,
     const hsize_t *end);
 static herr_t H5S__point_adjust_u(H5S_t *space, const hsize_t *offset);
-static herr_t H5S__point_project_scalar(const H5S_t *space, hsize_t *offset);
+static herr_t H5S__point_adjust_s(H5S_t *space, const hssize_t *offset);
+static herr_t H5S__point_project_scalar(const H5S_t *spasce, hsize_t *offset);
 static herr_t H5S__point_project_simple(const H5S_t *space, H5S_t *new_space,
     hsize_t *offset);
 static herr_t H5S__point_iter_init(const H5S_t *space, H5S_sel_iter_t *iter);
@@ -128,6 +129,7 @@ const H5S_select_class_t H5S_sel_point[1] = {{
     H5S__point_shape_same,
     H5S__point_intersect_block,
     H5S__point_adjust_u,
+    H5S__point_adjust_s,
     H5S__point_project_scalar,
     H5S__point_project_simple,
     H5S__point_iter_init,
@@ -2114,6 +2116,64 @@ H5S__point_adjust_u(H5S_t *space, const hsize_t *offset)
 } /* end H5S__point_adjust_u() */
 
 
+/*--------------------------------------------------------------------------
+ NAME
+    H5S__point_adjust_s
+ PURPOSE
+    Adjust a "point" selection by subtracting an offset
+ USAGE
+    herr_t H5S__point_adjust_u(space, offset)
+        H5S_t *space;           IN/OUT: Pointer to dataspace to adjust
+        const hssize_t *offset; IN: Offset to subtract
+ RETURNS
+    Non-negative on success, negative on failure
+ DESCRIPTION
+    Moves a point selection by subtracting an offset from it.
+ GLOBAL VARIABLES
+ COMMENTS, BUGS, ASSUMPTIONS
+ EXAMPLES
+ REVISION LOG
+--------------------------------------------------------------------------*/
+static herr_t
+H5S__point_adjust_s(H5S_t *space, const hssize_t *offset)
+{
+    H5S_pnt_node_t *node;               /* Point node */
+    unsigned rank;                      /* Dataspace rank */
+    unsigned u;                         /* Local index variable */
+
+    FUNC_ENTER_STATIC_NOERR
+
+    HDassert(space);
+    HDassert(offset);
+
+    /* Iterate through the nodes, checking the bounds on each element */
+    node = space->select.sel_info.pnt_lst->head;
+    rank = space->extent.rank;
+    while(node) {
+        /* Adjust each coordinate for point node */
+        for(u = 0; u < rank; u++) {
+            /* Check for offset moving selection negative */
+            HDassert((hssize_t)node->pnt[u] >= offset[u]);
+
+            /* Adjust node's coordinate location */
+            node->pnt[u] = (hsize_t)((hssize_t)node->pnt[u] - offset[u]);
+        } /* end for */
+
+        /* Advance to next point node in selection */
+        node = node->next;
+    } /* end while */
+
+    /* update the bound box of the selection */
+    for(u = 0; u < rank; u++) {
+        HDassert((hssize_t)space->select.sel_info.pnt_lst->low_bounds[u] >= offset[u]);
+        space->select.sel_info.pnt_lst->low_bounds[u] = (hsize_t)((hssize_t)space->select.sel_info.pnt_lst->low_bounds[u] - offset[u]);
+        space->select.sel_info.pnt_lst->high_bounds[u] = (hsize_t)((hssize_t)space->select.sel_info.pnt_lst->high_bounds[u] - offset[u]);
+    } /* end for */
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5S__point_adjust_s() */
+
+
 /*-------------------------------------------------------------------------
  * Function:    H5S__point_project_scalar
  *
diff --git a/src/H5Sprivate.h b/src/H5Sprivate.h
index 41c8b95..f29319f 100644
--- a/src/H5Sprivate.h
+++ b/src/H5Sprivate.h
@@ -145,6 +145,7 @@ typedef struct H5S_sel_iter_op_t {
 #define H5S_SELECT_IS_SINGLE(S)         ((*(S)->select.type->is_single)(S))
 #define H5S_SELECT_IS_REGULAR(S)        ((*(S)->select.type->is_regular)(S))
 #define H5S_SELECT_ADJUST_U(S,O)        ((*(S)->select.type->adjust_u)(S, O))
+#define H5S_SELECT_ADJUST_S(S,O)        ((*(S)->select.type->adjust_s)(S, O))
 #define H5S_SELECT_PROJECT_SCALAR(S,O)  ((*(S)->select.type->project_scalar)(S, O))
 #define H5S_SELECT_PROJECT_SIMPLE(S,NS, O) ((*(S)->select.type->project_simple)(S, NS, O))
 #define H5S_SELECT_ITER_COORDS(ITER,COORDS)     ((*(ITER)->type->iter_coords)(ITER,COORDS))
@@ -170,6 +171,7 @@ typedef struct H5S_sel_iter_op_t {
 #define H5S_SELECT_IS_SINGLE(S)         (H5S_select_is_single(S))
 #define H5S_SELECT_IS_REGULAR(S)        (H5S_select_is_regular(S))
 #define H5S_SELECT_ADJUST_U(S,O)        (H5S_select_adjust_u(S, O))
+#define H5S_SELECT_ADJUST_S(S,O)        (H5S_select_adjust_s(S, O))
 #define H5S_SELECT_PROJECT_SCALAR(S,O)  (H5S_select_project_scalar(S, O))
 #define H5S_SELECT_PROJECT_SIMPLE(S,NS,O) (H5S_select_project_simple(S, NS, O))
 #define H5S_SELECT_ITER_COORDS(ITER,COORDS)     (H5S_select_iter_coords(ITER,COORDS))
@@ -257,6 +259,7 @@ H5_DLL htri_t H5S_select_is_contiguous(const H5S_t *space);
 H5_DLL htri_t H5S_select_is_single(const H5S_t *space);
 H5_DLL htri_t H5S_select_is_regular(const H5S_t *space);
 H5_DLL herr_t H5S_select_adjust_u(H5S_t *space, const hsize_t *offset);
+H5_DLL herr_t H5S_select_adjust_s(H5S_t *space, const hssize_t *offset);
 H5_DLL herr_t H5S_select_project_scalar(const H5S_t *space, hsize_t *offset);
 H5_DLL herr_t H5S_select_project_simple(const H5S_t *space, H5S_t *new_space, hsize_t *offset);
 H5_DLL herr_t H5S_select_project_intersection(const H5S_t *src_space,
@@ -282,7 +285,6 @@ H5_DLL herr_t H5S_combine_hyperslab(H5S_t *old_space, H5S_seloper_t op,
     const hsize_t *block, H5S_t **new_space);
 H5_DLL herr_t H5S_hyper_add_span_element(H5S_t *space, unsigned rank,
     const hsize_t *coords);
-H5_DLL herr_t H5S_hyper_adjust_s(H5S_t *space, const hssize_t *offset);
 H5_DLL htri_t H5S_hyper_normalize_offset(H5S_t *space, hssize_t *old_offset);
 H5_DLL herr_t H5S_hyper_denormalize_offset(H5S_t *space, const hssize_t *old_offset);
 H5_DLL herr_t H5S_hyper_clip_unlim(H5S_t *space, hsize_t clip_size);
diff --git a/src/H5Spublic.h b/src/H5Spublic.h
index 263a880..f7c5ae7 100644
--- a/src/H5Spublic.h
+++ b/src/H5Spublic.h
@@ -143,7 +143,7 @@ H5_DLL H5S_sel_type H5Sget_select_type(hid_t spaceid);
 H5_DLL hssize_t H5Sget_select_npoints(hid_t spaceid);
 H5_DLL herr_t H5Sselect_copy(hid_t dst_id, hid_t src_id);
 H5_DLL htri_t H5Sselect_valid(hid_t spaceid);
-H5_DLL herr_t H5Sselect_adjust_u(hid_t spaceid, const hsize_t *offset);
+H5_DLL herr_t H5Sselect_adjust(hid_t spaceid, const hssize_t *offset);
 H5_DLL herr_t H5Sget_select_bounds(hid_t spaceid, hsize_t start[],
     hsize_t end[]);
 H5_DLL htri_t H5Sselect_shape_same(hid_t space1_id, hid_t space2_id);
@@ -171,7 +171,6 @@ H5_DLL htri_t H5Sget_regular_hyperslab(hid_t spaceid, hsize_t start[],
 H5_DLL hssize_t H5Sget_select_hyper_nblocks(hid_t spaceid);
 H5_DLL herr_t H5Sget_select_hyper_blocklist(hid_t spaceid, hsize_t startblock,
     hsize_t numblocks, hsize_t buf[/*numblocks*/]);
-H5_DLL herr_t H5Shyper_adjust_s(hid_t space_id, const hssize_t *offset);
 H5_DLL hid_t H5Sselect_project_intersection(hid_t src_space_id,
     hid_t dst_space_id, hid_t src_intersect_space_id);
 
diff --git a/src/H5Sselect.c b/src/H5Sselect.c
index c506218..ee7ad05 100644
--- a/src/H5Sselect.c
+++ b/src/H5Sselect.c
@@ -971,9 +971,59 @@ H5S_select_adjust_u(H5S_t *space, const hsize_t *offset)
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5S_select_adjust_u() */
 
+
+/*--------------------------------------------------------------------------
+ NAME
+    H5S_select_adjust_s
+ PURPOSE
+    Adjust a selection by subtracting an offset
+ USAGE
+    herr_t H5S_select_adjust_u(space, offset)
+        H5S_t *space;           IN/OUT: Pointer to dataspace to adjust
+        const hssize_t *offset; IN: Offset to subtract
+ RETURNS
+    Non-negative on success, negative on failure
+ DESCRIPTION
+    Moves a selection by subtracting an offset from it.
+ GLOBAL VARIABLES
+ COMMENTS, BUGS, ASSUMPTIONS
+    This routine participates in the "Inlining C function pointers"
+        pattern, don't call it directly, use the appropriate macro
+        defined in H5Sprivate.h.
+ EXAMPLES
+ REVISION LOG
+--------------------------------------------------------------------------*/
+herr_t
+H5S_select_adjust_s(H5S_t *space, const hssize_t *offset)
+{
+    hbool_t non_zero_offset = FALSE;    /* Whether any offset is non-zero */
+    unsigned u;                         /* Local index variable */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Check args */
+    HDassert(space);
+    HDassert(offset);
+
+    /* Check for an all-zero offset vector */
+    for(u = 0; u < space->extent.rank; u++)
+        if(0 != offset[u]) {
+            non_zero_offset = TRUE;
+            break;
+        } /* end if */
+
+    /* Only perform operation if the offset is non-zero */
+    if(non_zero_offset)
+        ret_value = (*space->select.type->adjust_s)(space, offset);
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5S_select_adjust_s() */
+
+
 /*--------------------------------------------------------------------------
  NAME
-    H5Sselect_adjust_u
+    H5Sselect_adjust
  PURPOSE
     Adjust a selection by subtracting an offset
  USAGE
@@ -990,25 +1040,35 @@ H5S_select_adjust_u(H5S_t *space, const hsize_t *offset)
  REVISION LOG
 --------------------------------------------------------------------------*/
 herr_t
-H5Sselect_adjust_u(hid_t space_id, const hsize_t *offset)
+H5Sselect_adjust(hid_t space_id, const hssize_t *offset)
 {
     H5S_t *space;
+    hsize_t low_bounds[H5S_MAX_RANK];
+    hsize_t high_bounds[H5S_MAX_RANK];
+    unsigned u;
     herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_API(FAIL)
-    H5TRACE2("e", "i*h", space_id, offset);
+    H5TRACE2("e", "i*Hs", space_id, offset);
 
     if(NULL == (space = (H5S_t *)H5I_object_verify(space_id, H5I_DATASPACE)))
         HGOTO_ERROR(H5E_DATASPACE, H5E_BADTYPE, FAIL, "not a dataspace")
     if(NULL == offset)
         HGOTO_ERROR(H5E_DATASPACE, H5E_BADTYPE, FAIL, "NULL offset pointer")
 
-    if(H5S_select_adjust_u(space, offset) < 0)
-        HGOTO_ERROR(H5E_DATASPACE, H5E_CANTSET, FAIL, "can't adjust selection");
+    /* Check bounds */
+    if(H5S_SELECT_BOUNDS(space, low_bounds, high_bounds) < 0)
+        HGOTO_ERROR(H5E_DATASPACE, H5E_CANTGET, FAIL, "can't get selection bounds")
+    for(u = 0; u < space->extent.rank; u++)
+        if(offset[u] > (hssize_t)low_bounds[u])
+            HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "adjustment would move selection below zero offset")
+
+    if(H5S_select_adjust_s(space, offset) < 0)
+        HGOTO_ERROR(H5E_DATASPACE, H5E_CANTSET, FAIL, "can't adjust selection")
 
 done:
     FUNC_LEAVE_API(ret_value)
-} /* end H5Sselect_adjust_u() */
+} /* end H5Sselect_adjust() */
 
 
 /*--------------------------------------------------------------------------