[svn-r8901] Purpose:

    Bug fix

Description:
    Allow buffer parameter to H5Dread & H5Dwrite to be NULL if there are no
elements to transfer.

Platforms tested:
    FreeBSD 4.10 (sleipnir) w/parallel
    Too minor to require h5committest

1 files changed, 20 insertions, 0 deletions

diff --git a/test/tselect.c b/test/tselect.c
index 228002c..c1d985f 100644
--- a/test/tselect.c
+++ b/test/tselect.c
@@ -253,6 +253,12 @@ test_select_hyper(hid_t xfer_plist)
     ret=H5Dwrite(dataset,H5T_NATIVE_UCHAR,sid2,sid1,xfer_plist,wbuf);
     CHECK(ret, FAIL, "H5Dwrite");
 
+    /* Exercise check for NULL buffer and valid selection */
+    H5E_BEGIN_TRY {
+        ret=H5Dwrite(dataset,H5T_NATIVE_UCHAR,sid2,sid1,xfer_plist,NULL);
+    } H5E_END_TRY;
+    VERIFY(ret, FAIL, "H5Dwrite");
+
     /* Close memory dataspace */
     ret = H5Sclose(sid2);
     CHECK(ret, FAIL, "H5Sclose");
@@ -273,6 +279,12 @@ test_select_hyper(hid_t xfer_plist)
     ret=H5Dread(dataset,H5T_NATIVE_UCHAR,sid2,sid1,xfer_plist,rbuf);
     CHECK(ret, FAIL, "H5Dread");
 
+    /* Exercise check for NULL buffer and valid selection */
+    H5E_BEGIN_TRY {
+        ret=H5Dread(dataset,H5T_NATIVE_UCHAR,sid2,sid1,xfer_plist,NULL);
+    } H5E_END_TRY;
+    VERIFY(ret, FAIL, "H5Dread");
+
     /* Check that the values match with a dataset iterator */
     tbuf=wbuf+(15*SPACE2_DIM2);
     ret = H5Diterate(rbuf,H5T_NATIVE_UCHAR,sid2,test_select_hyper_iter1,&tbuf);
@@ -5408,6 +5420,14 @@ test_select_none(void)
     ret=H5Dwrite(dataset,H5T_NATIVE_INT,sid2,sid1,H5P_DEFAULT,wbuf);
     CHECK(ret, FAIL, "H5Dwrite");
 
+    /* Write "nothing" to disk (with NULL buffer argument) */
+    ret=H5Dwrite(dataset,H5T_NATIVE_INT,sid2,sid1,H5P_DEFAULT,NULL);
+    CHECK(ret, FAIL, "H5Dwrite");
+
+    /* Read "nothing" from disk (with NULL buffer argument) */
+    ret=H5Dread(dataset,H5T_NATIVE_INT,sid2,sid1,H5P_DEFAULT,NULL);
+    CHECK(ret, FAIL, "H5Dread");
+
     /* Close memory dataspace */
     ret = H5Sclose(sid2);
     CHECK(ret, FAIL, "H5Sclose");