[svn-r22795] Create scalar test files and h5dump tests.

Tested: local linux

7 files changed, 699 insertions, 0 deletions

diff --git a/tools/h5dump/CMakeLists.txt b/tools/h5dump/CMakeLists.txt
index 0327949..dc60048 100644
--- a/tools/h5dump/CMakeLists.txt
+++ b/tools/h5dump/CMakeLists.txt
@@ -159,6 +159,8 @@ IF (BUILD_TESTING)
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tperror.ddl
       ${HDF5_TOOLS_SRC_DIR}/testfiles/treference.ddl
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tsaf.ddl
+      ${HDF5_TOOLS_SRC_DIR}/testfiles/tscalarintsize.ddl
+      ${HDF5_TOOLS_SRC_DIR}/testfiles/tscalarattrintsize.ddl
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tscaleoffset.ddl
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tshuffle.ddl
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tslink-1.ddl
@@ -260,6 +262,8 @@ IF (BUILD_TESTING)
       ${HDF5_TOOLS_SRC_DIR}/testfiles/torderattr.h5
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tordergr.h5
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tsaf.h5
+      ${HDF5_TOOLS_SRC_DIR}/testfiles/tscalarintsize.h5
+      ${HDF5_TOOLS_SRC_DIR}/testfiles/tscalarattrintsize.h5
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tslink.h5
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tsplit_file-m.h5
       ${HDF5_TOOLS_SRC_DIR}/testfiles/tsplit_file-r.h5
@@ -1016,6 +1020,10 @@ IF (BUILD_TESTING)
           treference.out.err
           tsaf.out
           tsaf.out.err
+          tscalarintsize.out
+          tscalarintsize.out.err
+          tscalarattrintsize.out
+          tscalarattrintsize.out.err
           tscaleoffset.out
           tscaleoffset.out.err
           tshuffle.out
@@ -1079,10 +1087,14 @@ IF (BUILD_TESTING)
   ADD_H5_TEST (packedbits 0 --enable-error-stack packedbits.h5)
   # test for compound signed/unsigned datasets
   ADD_H5_TEST (tcmpdintsize 0 --enable-error-stack tcmpdintsize.h5)
+  # test for signed/unsigned scalar datasets
+  ADD_H5_TEST (tscalarintsize 0 --enable-error-stack tscalarintsize.h5)
   # test for signed/unsigned attributes
   ADD_H5_TEST (tattrintsize 0 --enable-error-stack tattrintsize.h5)
   # test for compound signed/unsigned attributes
   ADD_H5_TEST (tcmpdattrintsize 0 --enable-error-stack tcmpdattrintsize.h5)
+  # test for signed/unsigned scalar attributes
+  ADD_H5_TEST (tscalarattrintsize 0 --enable-error-stack tscalarattrintsize.h5)
   # test for displaying groups
   ADD_H5_TEST (tgroup-1 0 --enable-error-stack tgroup.h5)
   # test for displaying the selected groups
diff --git a/tools/h5dump/h5dumpgentest.c b/tools/h5dump/h5dumpgentest.c
index 63329f4..e26ee40 100644
--- a/tools/h5dump/h5dumpgentest.c
+++ b/tools/h5dump/h5dumpgentest.c
@@ -102,6 +102,8 @@
 #define FILE70  "tcmpdintsize.h5"
 #define FILE71  "tcmpdattrintsize.h5"
 #define FILE72  "tnestedcmpddt.h5"
+#define FILE73  "tscalarintsize.h5"
+#define FILE74  "tscalarattrintsize.h5"
 
 /*-------------------------------------------------------------------------
  * prototypes
@@ -301,6 +303,23 @@ typedef struct s1_t {
 /* Name of dataset to create in datafile   */
 #define F71_DATASETNAME   "CompoundAttrIntSize"
 
+/* "FILE73" macros and for FILE69 */
+#define F73_ARRAY_RANK  2
+#define F73_XDIM        8
+#define F73_DATASETU08        "DU08BITS"
+#define F73_DATASETS08        "DS08BITS"
+#define F73_YDIM8       8
+#define F73_DATASETU16       "DU16BITS"
+#define F73_DATASETS16       "DS16BITS"
+#define F73_YDIM16      16
+#define F73_DATASETU32       "DU32BITS"
+#define F73_DATASETS32       "DS32BITS"
+#define F73_YDIM32      32
+#define F73_DATASETU64       "DU64BITS"
+#define F73_DATASETS64       "DS64BITS"
+#define F73_YDIM64      64
+#define F73_DUMMYDBL        "DummyDBL"
+
 static void
 gent_group(void)
 {
@@ -8097,6 +8116,404 @@ static void gent_nested_compound_dt(void) {       /* test nested data type */
 }
 
 /*-------------------------------------------------------------------------
+ * Function:    gent_intscalars
+ *
+ * Purpose:     Generate a file to be used in the h5dump tests.
+ *   Four datasets of 1, 2, 4 and 8 bytes of unsigned int types are created.
+ *   Four more datasets of 1, 2, 4 and 8 bytes of signed int types are created.
+ *   Fill them with raw data such that no bit will be all zero in a dataset.
+ *   A dummy dataset of double type is created for failure test.
+ *-------------------------------------------------------------------------
+ */
+static void
+gent_intscalars(void)
+{
+    hid_t fid, dataset, space, tid;
+    hsize_t dims[2];
+    uint8_t  dsetu8[F73_XDIM][F73_YDIM8],   valu8bits;
+    uint16_t dsetu16[F73_XDIM][F73_YDIM16], valu16bits;
+    uint32_t dsetu32[F73_XDIM][F73_YDIM32], valu32bits;
+    uint64_t dsetu64[F73_XDIM][F73_YDIM64], valu64bits;
+    int8_t  dset8[F73_XDIM][F73_YDIM8],   val8bits;
+    int16_t dset16[F73_XDIM][F73_YDIM16], val16bits;
+    int32_t dset32[F73_XDIM][F73_YDIM32], val32bits;
+    int64_t dset64[F73_XDIM][F73_YDIM64], val64bits;
+    double  dsetdbl[F73_XDIM][F73_YDIM8];
+    unsigned int i, j;
+
+    fid = H5Fcreate(FILE73, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
+
+    /* Dataset of 8 bits unsigned int */
+    dims[0] = F73_XDIM; dims[1] = F73_YDIM8;
+    space = H5Screate(H5S_SCALAR);
+    tid = H5Tarray_create2(H5T_STD_U8LE, F73_ARRAY_RANK, dims);
+    dataset = H5Dcreate2(fid, F73_DATASETU08, tid, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
+
+    valu8bits = (uint8_t) ~0u;  /* all 1s */
+    for(i = 0; i < dims[0]; i++){
+        dsetu8[i][0] = valu8bits;
+        for(j = 1; j < dims[1]; j++) {
+            dsetu8[i][j] = dsetu8[i][j-1] << 1;
+        }
+        valu8bits <<= 1;
+    }
+
+    H5Dwrite(dataset, tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, dsetu8);
+    H5Sclose(space);
+    H5Dclose(dataset);
+
+    /* Dataset of 16 bits unsigned int */
+    dims[0] = F73_XDIM; dims[1] = F73_YDIM16;
+    space = H5Screate(H5S_SCALAR);
+    tid = H5Tarray_create2(H5T_STD_U16LE, F73_ARRAY_RANK, dims);
+    dataset = H5Dcreate2(fid, F73_DATASETU16, tid, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
+
+    valu16bits = (uint16_t) ~0u;    /* all 1s */
+    for(i = 0; i < dims[0]; i++){
+        dsetu16[i][0] = valu16bits;
+        for(j = 1; j < dims[1]; j++) {
+            dsetu16[i][j] = dsetu16[i][j-1] << 1;
+        }
+        valu16bits <<= 1;
+    }
+
+    H5Dwrite(dataset, tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, dsetu16);
+    H5Sclose(space);
+    H5Dclose(dataset);
+
+    /* Dataset of 32 bits unsigned int */
+    dims[0] = F73_XDIM; dims[1] = F73_YDIM32;
+    space = H5Screate(H5S_SCALAR);
+    tid = H5Tarray_create2(H5T_STD_U32LE, F73_ARRAY_RANK, dims);
+    dataset = H5Dcreate2(fid, F73_DATASETU32, tid, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
+
+    valu32bits = (uint32_t) ~0u;    /* all 1s */
+    for(i = 0; i < dims[0]; i++){
+        dsetu32[i][0] = valu32bits;
+        for(j = 1; j < dims[1]; j++) {
+            dsetu32[i][j] = dsetu32[i][j-1] << 1;
+        }
+        valu32bits <<= 1;
+    }
+
+    H5Dwrite(dataset, tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, dsetu32);
+    H5Sclose(space);
+    H5Dclose(dataset);
+
+    /* Dataset of 64 bits unsigned int */
+    dims[0] = F73_XDIM; dims[1] = F73_YDIM64;
+    space = H5Screate(H5S_SCALAR);
+    tid = H5Tarray_create2(H5T_STD_U64LE, F73_ARRAY_RANK, dims);
+    dataset = H5Dcreate2(fid, F73_DATASETU64, tid, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
+
+    valu64bits = (uint64_t) ~0Lu;    /* all 1s */
+    for(i = 0; i < dims[0]; i++){
+        dsetu64[i][0] = valu64bits;
+        for(j = 1; j < dims[1]; j++) {
+            dsetu64[i][j] = dsetu64[i][j-1] << 1;
+        }
+        valu64bits <<= 1;
+    }
+
+    H5Dwrite(dataset, tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, dsetu64);
+    H5Sclose(space);
+    H5Dclose(dataset);
+
+    /* Dataset of 8 bits signed int */
+    dims[0] = F73_XDIM; dims[1] = F73_YDIM8;
+    space = H5Screate(H5S_SCALAR);
+    tid = H5Tarray_create2(H5T_STD_I8LE, F73_ARRAY_RANK, dims);
+    dataset = H5Dcreate2(fid, F73_DATASETS08, tid, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
+
+    val8bits = (int8_t) ~0; /* all 1s */
+    for(i = 0; i < dims[0]; i++){
+        dset8[i][0] = val8bits;
+        for(j = 1; j < dims[1]; j++) {
+            dset8[i][j] = dset8[i][j-1] << 1;
+        }
+        val8bits <<= 1;
+    }
+
+    H5Dwrite(dataset, tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, dset8);
+    H5Sclose(space);
+    H5Dclose(dataset);
+
+    /* Dataset of 16 bits signed int */
+    dims[0] = F73_XDIM; dims[1] = F73_YDIM16;
+    space = H5Screate(H5S_SCALAR);
+    tid = H5Tarray_create2(H5T_STD_I16LE, F73_ARRAY_RANK, dims);
+    dataset = H5Dcreate2(fid, F73_DATASETS16, tid, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
+
+    val16bits = (int16_t) ~0;   /* all 1s */
+    for(i = 0; i < dims[0]; i++){
+        dset16[i][0] = val16bits;
+        for(j = 1; j < dims[1]; j++) {
+            dset16[i][j] = dset16[i][j-1] << 1;
+        }
+        val16bits <<= 1;
+    }
+
+    H5Dwrite(dataset, tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, dset16);
+    H5Sclose(space);
+    H5Dclose(dataset);
+
+    /* Dataset of 32 bits signed int */
+    dims[0] = F73_XDIM; dims[1] = F73_YDIM32;
+    space = H5Screate(H5S_SCALAR);
+    tid = H5Tarray_create2(H5T_STD_I32LE, F73_ARRAY_RANK, dims);
+    dataset = H5Dcreate2(fid, F73_DATASETS32, tid, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
+
+    val32bits = (int32_t) ~0;   /* all 1s */
+    for(i = 0; i < dims[0]; i++){
+        dset32[i][0] = val32bits;
+        for(j = 1; j < dims[1]; j++) {
+            dset32[i][j] = dset32[i][j-1] << 1;
+        }
+        val32bits <<= 1;
+    }
+
+    H5Dwrite(dataset, tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, dset32);
+    H5Sclose(space);
+    H5Dclose(dataset);
+
+    /* Dataset of 64 bits signed int */
+    dims[0] = F73_XDIM; dims[1] = F73_YDIM64;
+    space = H5Screate(H5S_SCALAR);
+    tid = H5Tarray_create2(H5T_STD_I64LE, F73_ARRAY_RANK, dims);
+    dataset = H5Dcreate2(fid, F73_DATASETS64, tid, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
+
+    val64bits = (int64_t) ~0L;   /* all 1s */
+    for(i = 0; i < dims[0]; i++){
+        dset64[i][0] = val64bits;
+        for(j = 1; j < dims[1]; j++) {
+            dset64[i][j] = dset64[i][j-1] << 1;
+        }
+        val64bits <<= 1;
+    }
+
+    H5Dwrite(dataset, tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, dset64);
+    H5Sclose(space);
+    H5Dclose(dataset);
+
+    /* Double Dummy set for failure tests */
+    dims[0] = F73_XDIM; dims[1] = F73_YDIM8;
+    space = H5Screate(H5S_SCALAR);
+    tid = H5Tarray_create2(H5T_IEEE_F64BE, F73_ARRAY_RANK, dims);
+    dataset = H5Dcreate2(fid, F73_DUMMYDBL, tid, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
+
+    for(i = 0; i < dims[0]; i++)
+        for(j = 0; j < dims[1]; j++)
+            dsetdbl[i][j] = 0.0001 * j + i;
+
+    H5Dwrite(dataset, tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, dsetdbl);
+
+    H5Sclose(space);
+    H5Dclose(dataset);
+    H5Fclose(fid);
+}
+
+/*-------------------------------------------------------------------------
+ * Function:    gent_attr_packedbits
+ *
+ * Purpose:     Generate a file to be used in the h5dump packed bits tests.
+ *   Four attributes of 1, 2, 4 and 8 bytes of unsigned int types are created.
+ *   Four more datasets of 1, 2, 4 and 8 bytes of signed int types are created.
+ *   Fill them with raw data such that no bit will be all zero in a dataset.
+ *   A dummy dataset of double type is created for failure test.
+ *   Use file to test Signed/Unsigned datatypes and keep in sync with gent_packedbits()
+ *-------------------------------------------------------------------------
+ */
+static void
+gent_attr_intscalars(void)
+{
+    hid_t fid, attr, space, root, tid;
+    hsize_t dims[2];
+    uint8_t  dsetu8[F73_XDIM][F73_YDIM8],   valu8bits;
+    uint16_t dsetu16[F73_XDIM][F73_YDIM16], valu16bits;
+    uint32_t dsetu32[F73_XDIM][F73_YDIM32], valu32bits;
+    uint64_t dsetu64[F73_XDIM][F73_YDIM64], valu64bits;
+    int8_t  dset8[F73_XDIM][F73_YDIM8],   val8bits;
+    int16_t dset16[F73_XDIM][F73_YDIM16], val16bits;
+    int32_t dset32[F73_XDIM][F73_YDIM32], val32bits;
+    int64_t dset64[F73_XDIM][F73_YDIM64], val64bits;
+    double  dsetdbl[F73_XDIM][F73_YDIM8];
+    unsigned int i, j;
+
+    fid = H5Fcreate(FILE74, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
+    root = H5Gopen2(fid, "/", H5P_DEFAULT);
+
+    /* Attribute of 8 bits unsigned int */
+    dims[0] = F73_XDIM; dims[1] = F73_YDIM8;
+    space = H5Screate(H5S_SCALAR);
+    tid = H5Tarray_create2(H5T_STD_U8LE, F73_ARRAY_RANK, dims);
+    attr = H5Acreate2(root, F73_DATASETU08, tid, space, H5P_DEFAULT, H5P_DEFAULT);
+
+    valu8bits = (uint8_t) ~0u;  /* all 1s */
+    for(i = 0; i < dims[0]; i++){
+        dsetu8[i][0] = valu8bits;
+        for(j = 1; j < dims[1]; j++) {
+            dsetu8[i][j] = dsetu8[i][j-1] << 1;
+        }
+        valu8bits <<= 1;
+    }
+
+    H5Awrite(attr, tid, dsetu8);
+    H5Sclose(space);
+    H5Aclose(attr);
+
+    /* Attribute of 16 bits unsigned int */
+    dims[0] = F73_XDIM; dims[1] = F73_YDIM16;
+    space = H5Screate(H5S_SCALAR);
+    tid = H5Tarray_create2(H5T_STD_U16LE, F73_ARRAY_RANK, dims);
+    attr = H5Acreate2(root, F73_DATASETU16, tid, space, H5P_DEFAULT, H5P_DEFAULT);
+
+    valu16bits = (uint16_t) ~0u;    /* all 1s */
+    for(i = 0; i < dims[0]; i++){
+        dsetu16[i][0] = valu16bits;
+        for(j = 1; j < dims[1]; j++) {
+            dsetu16[i][j] = dsetu16[i][j-1] << 1;
+        }
+        valu16bits <<= 1;
+    }
+
+    H5Awrite(attr, tid, dsetu16);
+    H5Sclose(space);
+    H5Aclose(attr);
+
+    /* Attribute of 32 bits unsigned int */
+    dims[0] = F73_XDIM; dims[1] = F73_YDIM32;
+    space = H5Screate(H5S_SCALAR);
+    tid = H5Tarray_create2(H5T_STD_U32LE, F73_ARRAY_RANK, dims);
+    attr = H5Acreate2(root, F73_DATASETU32, tid, space, H5P_DEFAULT, H5P_DEFAULT);
+
+    valu32bits = (uint32_t) ~0u;    /* all 1s */
+    for(i = 0; i < dims[0]; i++){
+        dsetu32[i][0] = valu32bits;
+        for(j = 1; j < dims[1]; j++) {
+            dsetu32[i][j] = dsetu32[i][j-1] << 1;
+        }
+        valu32bits <<= 1;
+    }
+
+    H5Awrite(attr, tid, dsetu32);
+    H5Sclose(space);
+    H5Aclose(attr);
+
+    /* Attribute of 64 bits unsigned int */
+    dims[0] = F73_XDIM; dims[1] = F73_YDIM64;
+    space = H5Screate(H5S_SCALAR);
+    tid = H5Tarray_create2(H5T_STD_U64LE, F73_ARRAY_RANK, dims);
+    attr = H5Acreate2(root, F73_DATASETU64, tid, space, H5P_DEFAULT, H5P_DEFAULT);
+
+    valu64bits = (uint64_t) ~0Lu;    /* all 1s */
+    for(i = 0; i < dims[0]; i++){
+        dsetu64[i][0] = valu64bits;
+        for(j = 1; j < dims[1]; j++) {
+            dsetu64[i][j] = dsetu64[i][j-1] << 1;
+        }
+        valu64bits <<= 1;
+    }
+
+    H5Awrite(attr, tid, dsetu64);
+    H5Sclose(space);
+    H5Aclose(attr);
+
+    /* Attribute of 8 bits signed int */
+    dims[0] = F73_XDIM; dims[1] = F73_YDIM8;
+    space = H5Screate(H5S_SCALAR);
+    tid = H5Tarray_create2(H5T_STD_I8LE, F73_ARRAY_RANK, dims);
+    attr = H5Acreate2(root, F73_DATASETS08, tid, space, H5P_DEFAULT, H5P_DEFAULT);
+
+    val8bits = (int8_t) ~0; /* all 1s */
+    for(i = 0; i < dims[0]; i++){
+        dset8[i][0] = val8bits;
+        for(j = 1; j < dims[1]; j++) {
+            dset8[i][j] = dset8[i][j-1] << 1;
+        }
+        val8bits <<= 1;
+    }
+
+    H5Awrite(attr, tid, dset8);
+    H5Sclose(space);
+    H5Aclose(attr);
+
+    /* Attribute of 16 bits signed int */
+    dims[0] = F73_XDIM; dims[1] = F73_YDIM16;
+    space = H5Screate(H5S_SCALAR);
+    tid = H5Tarray_create2(H5T_STD_I16LE, F73_ARRAY_RANK, dims);
+    attr = H5Acreate2(root, F73_DATASETS16, tid, space, H5P_DEFAULT, H5P_DEFAULT);
+
+    val16bits = (int16_t) ~0;   /* all 1s */
+    for(i = 0; i < dims[0]; i++){
+        dset16[i][0] = val16bits;
+        for(j = 1; j < dims[1]; j++) {
+            dset16[i][j] = dset16[i][j-1] << 1;
+        }
+        val16bits <<= 1;
+    }
+
+    H5Awrite(attr, tid, dset16);
+    H5Sclose(space);
+    H5Aclose(attr);
+
+    /* Attribute of 32 bits signed int */
+    dims[0] = F73_XDIM; dims[1] = F73_YDIM32;
+    space = H5Screate(H5S_SCALAR);
+    tid = H5Tarray_create2(H5T_STD_I32LE, F73_ARRAY_RANK, dims);
+    attr = H5Acreate2(root, F73_DATASETS32, tid, space, H5P_DEFAULT, H5P_DEFAULT);
+
+    val32bits = (int32_t) ~0;   /* all 1s */
+    for(i = 0; i < dims[0]; i++){
+        dset32[i][0] = val32bits;
+        for(j = 1; j < dims[1]; j++) {
+            dset32[i][j] = dset32[i][j-1] << 1;
+        }
+        val32bits <<= 1;
+    }
+
+    H5Awrite(attr, tid, dset32);
+    H5Sclose(space);
+    H5Aclose(attr);
+
+    /* Attribute of 64 bits signed int */
+    dims[0] = F73_XDIM; dims[1] = F73_YDIM64;
+    space = H5Screate(H5S_SCALAR);
+    tid = H5Tarray_create2(H5T_STD_I64LE, F73_ARRAY_RANK, dims);
+    attr = H5Acreate2(root, F73_DATASETS64, tid, space, H5P_DEFAULT, H5P_DEFAULT);
+
+    val64bits = (int64_t) ~0L;   /* all 1s */
+    for(i = 0; i < dims[0]; i++){
+        dset64[i][0] = val64bits;
+        for(j = 1; j < dims[1]; j++) {
+            dset64[i][j] = dset64[i][j-1] << 1;
+        }
+        val64bits <<= 1;
+    }
+
+    H5Awrite(attr, tid, dset64);
+    H5Sclose(space);
+    H5Aclose(attr);
+
+    /* Double Dummy set for failure tests */
+    dims[0] = F73_XDIM; dims[1] = F73_YDIM8;
+    space = H5Screate(H5S_SCALAR);
+    tid = H5Tarray_create2(H5T_IEEE_F64BE, F73_ARRAY_RANK, dims);
+    attr = H5Acreate2(root, F73_DUMMYDBL, tid, space, H5P_DEFAULT, H5P_DEFAULT);
+
+    for(i = 0; i < dims[0]; i++)
+        for(j = 0; j < dims[1]; j++)
+            dsetdbl[i][j] = 0.0001 * j + i;
+
+    H5Awrite(attr, tid, dsetdbl);
+
+    H5Sclose(space);
+    H5Aclose(attr);
+
+    H5Gclose(root);
+    H5Fclose(fid);
+}
+
+/*-------------------------------------------------------------------------
  * Function: main
  *
  *-------------------------------------------------------------------------
@@ -8178,6 +8595,8 @@ int main(void)
     gent_compound_attr_intsizes();
 
     gent_nested_compound_dt();
+    gent_intscalars();
+    gent_attr_intscalars();
 
     return 0;
 }
diff --git a/tools/h5dump/testh5dump.sh.in b/tools/h5dump/testh5dump.sh.in
index 2373f6f..c90c364 100644
--- a/tools/h5dump/testh5dump.sh.in
+++ b/tools/h5dump/testh5dump.sh.in
@@ -143,6 +143,8 @@ $SRC_H5DUMP_TESTFILES/zerodim.h5
 $SRC_H5DUMP_TESTFILES/torderattr.h5
 $SRC_H5DUMP_TESTFILES/tordergr.h5
 $SRC_H5DUMP_TESTFILES/tsaf.h5
+$SRC_H5DUMP_TESTFILES/tscalarintsize.h5
+$SRC_H5DUMP_TESTFILES/tscalarattrintsize.h5
 $SRC_H5DUMP_TESTFILES/tslink.h5
 $SRC_H5DUMP_TESTFILES/tsplit_file-m.h5
 $SRC_H5DUMP_TESTFILES/tsplit_file-r.h5
@@ -277,6 +279,8 @@ $SRC_H5DUMP_TESTFILES/torderlinks2.ddl
 $SRC_H5DUMP_TESTFILES/tperror.ddl
 $SRC_H5DUMP_TESTFILES/treference.ddl
 $SRC_H5DUMP_TESTFILES/tsaf.ddl
+$SRC_H5DUMP_TESTFILES/tscalarintsize.ddl
+$SRC_H5DUMP_TESTFILES/tscalarattrintsize.ddl
 $SRC_H5DUMP_TESTFILES/tscaleoffset.ddl
 $SRC_H5DUMP_TESTFILES/tshuffle.ddl
 $SRC_H5DUMP_TESTFILES/tslink-1.ddl
@@ -678,10 +682,14 @@ TOOLTEST twidedisplay.ddl --enable-error-stack -w0 packedbits.h5
 TOOLTEST packedbits.ddl --enable-error-stack packedbits.h5
 # test for compound signed/unsigned datasets
 TOOLTEST tcmpdintsize.ddl --enable-error-stack tcmpdintsize.h5
+# test for signed/unsigned scalar datasets
+TOOLTEST tscalarintsize.ddl --enable-error-stack tscalarintsize.h5
 # test for signed/unsigned attributes
 TOOLTEST tattrintsize.ddl --enable-error-stack tattrintsize.h5
 # test for compound signed/unsigned attributes
 TOOLTEST tcmpdattrintsize.ddl --enable-error-stack tcmpdattrintsize.h5
+# test for signed/unsigned scalar attributes
+TOOLTEST tscalarattrintsize.ddl --enable-error-stack tscalarattrintsize.h5
 # test for displaying groups
 TOOLTEST tgroup-1.ddl --enable-error-stack tgroup.h5
 # test for displaying the selected groups
diff --git a/tools/testfiles/tscalarattrintsize.ddl b/tools/testfiles/tscalarattrintsize.ddl
new file mode 100644
index 0000000..4157859
--- /dev/null
+++ b/tools/testfiles/tscalarattrintsize.ddl
@@ -0,0 +1,130 @@
+HDF5 "tscalarattrintsize.h5" {
+GROUP "/" {
+   ATTRIBUTE "DS08BITS" {
+      DATATYPE  H5T_ARRAY { [8][8] H5T_STD_I8LE }
+      DATASPACE  SCALAR
+      DATA {
+      (0): [ -1, -2, -4, -8, -16, -32, -64, -128,
+            -2, -4, -8, -16, -32, -64, -128, 0,
+            -4, -8, -16, -32, -64, -128, 0, 0,
+            -8, -16, -32, -64, -128, 0, 0, 0,
+            -16, -32, -64, -128, 0, 0, 0, 0,
+            -32, -64, -128, 0, 0, 0, 0, 0,
+            -64, -128, 0, 0, 0, 0, 0, 0,
+            -128, 0, 0, 0, 0, 0, 0, 0 ]
+      }
+   }
+   ATTRIBUTE "DS16BITS" {
+      DATATYPE  H5T_ARRAY { [8][16] H5T_STD_I16LE }
+      DATASPACE  SCALAR
+      DATA {
+      (0): [ -1, -2, -4, -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768,
+            -2, -4, -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, 0,
+            -4, -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, 0, 0,
+            -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, 0, 0, 0,
+            -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, 0, 0, 0, 0,
+            -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, 0, 0, 0, 0, 0,
+            -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, 0, 0, 0, 0, 0, 0,
+            -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, 0, 0, 0, 0, 0, 0, 0 ]
+      }
+   }
+   ATTRIBUTE "DS32BITS" {
+      DATATYPE  H5T_ARRAY { [8][32] H5T_STD_I32LE }
+      DATASPACE  SCALAR
+      DATA {
+      (0): [ -1, -2, -4, -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648,
+            -2, -4, -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, 0,
+            -4, -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, 0, 0,
+            -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, 0, 0, 0,
+            -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, 0, 0, 0, 0,
+            -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, 0, 0, 0, 0, 0,
+            -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, 0, 0, 0, 0, 0, 0,
+            -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, 0, 0, 0, 0, 0, 0, 0 ]
+      }
+   }
+   ATTRIBUTE "DS64BITS" {
+      DATATYPE  H5T_ARRAY { [8][64] H5T_STD_I64LE }
+      DATASPACE  SCALAR
+      DATA {
+      (0): [ -1, -2, -4, -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, -4294967296, -8589934592, -17179869184, -34359738368, -68719476736, -137438953472, -274877906944, -549755813888, -1099511627776, -2199023255552, -4398046511104, -8796093022208, -17592186044416, -35184372088832, -70368744177664, -140737488355328, -281474976710656, -562949953421312, -1125899906842624, -2251799813685248, -4503599627370496, -9007199254740992, -18014398509481984, -36028797018963968, -72057594037927936, -144115188075855872, -288230376151711744, -576460752303423488, -1152921504606846976, -2305843009213693952, -4611686018427387904, -9223372036854775808,
+            -2, -4, -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, -4294967296, -8589934592, -17179869184, -34359738368, -68719476736, -137438953472, -274877906944, -549755813888, -1099511627776, -2199023255552, -4398046511104, -8796093022208, -17592186044416, -35184372088832, -70368744177664, -140737488355328, -281474976710656, -562949953421312, -1125899906842624, -2251799813685248, -4503599627370496, -9007199254740992, -18014398509481984, -36028797018963968, -72057594037927936, -144115188075855872, -288230376151711744, -576460752303423488, -1152921504606846976, -2305843009213693952, -4611686018427387904, -9223372036854775808, 0,
+            -4, -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, -4294967296, -8589934592, -17179869184, -34359738368, -68719476736, -137438953472, -274877906944, -549755813888, -1099511627776, -2199023255552, -4398046511104, -8796093022208, -17592186044416, -35184372088832, -70368744177664, -140737488355328, -281474976710656, -562949953421312, -1125899906842624, -2251799813685248, -4503599627370496, -9007199254740992, -18014398509481984, -36028797018963968, -72057594037927936, -144115188075855872, -288230376151711744, -576460752303423488, -1152921504606846976, -2305843009213693952, -4611686018427387904, -9223372036854775808, 0, 0,
+            -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, -4294967296, -8589934592, -17179869184, -34359738368, -68719476736, -137438953472, -274877906944, -549755813888, -1099511627776, -2199023255552, -4398046511104, -8796093022208, -17592186044416, -35184372088832, -70368744177664, -140737488355328, -281474976710656, -562949953421312, -1125899906842624, -2251799813685248, -4503599627370496, -9007199254740992, -18014398509481984, -36028797018963968, -72057594037927936, -144115188075855872, -288230376151711744, -576460752303423488, -1152921504606846976, -2305843009213693952, -4611686018427387904, -9223372036854775808, 0, 0, 0,
+            -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, -4294967296, -8589934592, -17179869184, -34359738368, -68719476736, -137438953472, -274877906944, -549755813888, -1099511627776, -2199023255552, -4398046511104, -8796093022208, -17592186044416, -35184372088832, -70368744177664, -140737488355328, -281474976710656, -562949953421312, -1125899906842624, -2251799813685248, -4503599627370496, -9007199254740992, -18014398509481984, -36028797018963968, -72057594037927936, -144115188075855872, -288230376151711744, -576460752303423488, -1152921504606846976, -2305843009213693952, -4611686018427387904, -9223372036854775808, 0, 0, 0, 0,
+            -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, -4294967296, -8589934592, -17179869184, -34359738368, -68719476736, -137438953472, -274877906944, -549755813888, -1099511627776, -2199023255552, -4398046511104, -8796093022208, -17592186044416, -35184372088832, -70368744177664, -140737488355328, -281474976710656, -562949953421312, -1125899906842624, -2251799813685248, -4503599627370496, -9007199254740992, -18014398509481984, -36028797018963968, -72057594037927936, -144115188075855872, -288230376151711744, -576460752303423488, -1152921504606846976, -2305843009213693952, -4611686018427387904, -9223372036854775808, 0, 0, 0, 0, 0,
+            -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, -4294967296, -8589934592, -17179869184, -34359738368, -68719476736, -137438953472, -274877906944, -549755813888, -1099511627776, -2199023255552, -4398046511104, -8796093022208, -17592186044416, -35184372088832, -70368744177664, -140737488355328, -281474976710656, -562949953421312, -1125899906842624, -2251799813685248, -4503599627370496, -9007199254740992, -18014398509481984, -36028797018963968, -72057594037927936, -144115188075855872, -288230376151711744, -576460752303423488, -1152921504606846976, -2305843009213693952, -4611686018427387904, -9223372036854775808, 0, 0, 0, 0, 0, 0,
+            -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, -4294967296, -8589934592, -17179869184, -34359738368, -68719476736, -137438953472, -274877906944, -549755813888, -1099511627776, -2199023255552, -4398046511104, -8796093022208, -17592186044416, -35184372088832, -70368744177664, -140737488355328, -281474976710656, -562949953421312, -1125899906842624, -2251799813685248, -4503599627370496, -9007199254740992, -18014398509481984, -36028797018963968, -72057594037927936, -144115188075855872, -288230376151711744, -576460752303423488, -1152921504606846976, -2305843009213693952, -4611686018427387904, -9223372036854775808, 0, 0, 0, 0, 0, 0, 0 ]
+      }
+   }
+   ATTRIBUTE "DU08BITS" {
+      DATATYPE  H5T_ARRAY { [8][8] H5T_STD_U8LE }
+      DATASPACE  SCALAR
+      DATA {
+      (0): [ 255, 254, 252, 248, 240, 224, 192, 128,
+            254, 252, 248, 240, 224, 192, 128, 0,
+            252, 248, 240, 224, 192, 128, 0, 0,
+            248, 240, 224, 192, 128, 0, 0, 0,
+            240, 224, 192, 128, 0, 0, 0, 0,
+            224, 192, 128, 0, 0, 0, 0, 0,
+            192, 128, 0, 0, 0, 0, 0, 0,
+            128, 0, 0, 0, 0, 0, 0, 0 ]
+      }
+   }
+   ATTRIBUTE "DU16BITS" {
+      DATATYPE  H5T_ARRAY { [8][16] H5T_STD_U16LE }
+      DATASPACE  SCALAR
+      DATA {
+      (0): [ 65535, 65534, 65532, 65528, 65520, 65504, 65472, 65408, 65280, 65024, 64512, 63488, 61440, 57344, 49152, 32768,
+            65534, 65532, 65528, 65520, 65504, 65472, 65408, 65280, 65024, 64512, 63488, 61440, 57344, 49152, 32768, 0,
+            65532, 65528, 65520, 65504, 65472, 65408, 65280, 65024, 64512, 63488, 61440, 57344, 49152, 32768, 0, 0,
+            65528, 65520, 65504, 65472, 65408, 65280, 65024, 64512, 63488, 61440, 57344, 49152, 32768, 0, 0, 0,
+            65520, 65504, 65472, 65408, 65280, 65024, 64512, 63488, 61440, 57344, 49152, 32768, 0, 0, 0, 0,
+            65504, 65472, 65408, 65280, 65024, 64512, 63488, 61440, 57344, 49152, 32768, 0, 0, 0, 0, 0,
+            65472, 65408, 65280, 65024, 64512, 63488, 61440, 57344, 49152, 32768, 0, 0, 0, 0, 0, 0,
+            65408, 65280, 65024, 64512, 63488, 61440, 57344, 49152, 32768, 0, 0, 0, 0, 0, 0, 0 ]
+      }
+   }
+   ATTRIBUTE "DU32BITS" {
+      DATATYPE  H5T_ARRAY { [8][32] H5T_STD_U32LE }
+      DATASPACE  SCALAR
+      DATA {
+      (0): [ 4294967295, 4294967294, 4294967292, 4294967288, 4294967280, 4294967264, 4294967232, 4294967168, 4294967040, 4294966784, 4294966272, 4294965248, 4294963200, 4294959104, 4294950912, 4294934528, 4294901760, 4294836224, 4294705152, 4294443008, 4293918720, 4292870144, 4290772992, 4286578688, 4278190080, 4261412864, 4227858432, 4160749568, 4026531840, 3758096384, 3221225472, 2147483648,
+            4294967294, 4294967292, 4294967288, 4294967280, 4294967264, 4294967232, 4294967168, 4294967040, 4294966784, 4294966272, 4294965248, 4294963200, 4294959104, 4294950912, 4294934528, 4294901760, 4294836224, 4294705152, 4294443008, 4293918720, 4292870144, 4290772992, 4286578688, 4278190080, 4261412864, 4227858432, 4160749568, 4026531840, 3758096384, 3221225472, 2147483648, 0,
+            4294967292, 4294967288, 4294967280, 4294967264, 4294967232, 4294967168, 4294967040, 4294966784, 4294966272, 4294965248, 4294963200, 4294959104, 4294950912, 4294934528, 4294901760, 4294836224, 4294705152, 4294443008, 4293918720, 4292870144, 4290772992, 4286578688, 4278190080, 4261412864, 4227858432, 4160749568, 4026531840, 3758096384, 3221225472, 2147483648, 0, 0,
+            4294967288, 4294967280, 4294967264, 4294967232, 4294967168, 4294967040, 4294966784, 4294966272, 4294965248, 4294963200, 4294959104, 4294950912, 4294934528, 4294901760, 4294836224, 4294705152, 4294443008, 4293918720, 4292870144, 4290772992, 4286578688, 4278190080, 4261412864, 4227858432, 4160749568, 4026531840, 3758096384, 3221225472, 2147483648, 0, 0, 0,
+            4294967280, 4294967264, 4294967232, 4294967168, 4294967040, 4294966784, 4294966272, 4294965248, 4294963200, 4294959104, 4294950912, 4294934528, 4294901760, 4294836224, 4294705152, 4294443008, 4293918720, 4292870144, 4290772992, 4286578688, 4278190080, 4261412864, 4227858432, 4160749568, 4026531840, 3758096384, 3221225472, 2147483648, 0, 0, 0, 0,
+            4294967264, 4294967232, 4294967168, 4294967040, 4294966784, 4294966272, 4294965248, 4294963200, 4294959104, 4294950912, 4294934528, 4294901760, 4294836224, 4294705152, 4294443008, 4293918720, 4292870144, 4290772992, 4286578688, 4278190080, 4261412864, 4227858432, 4160749568, 4026531840, 3758096384, 3221225472, 2147483648, 0, 0, 0, 0, 0,
+            4294967232, 4294967168, 4294967040, 4294966784, 4294966272, 4294965248, 4294963200, 4294959104, 4294950912, 4294934528, 4294901760, 4294836224, 4294705152, 4294443008, 4293918720, 4292870144, 4290772992, 4286578688, 4278190080, 4261412864, 4227858432, 4160749568, 4026531840, 3758096384, 3221225472, 2147483648, 0, 0, 0, 0, 0, 0,
+            4294967168, 4294967040, 4294966784, 4294966272, 4294965248, 4294963200, 4294959104, 4294950912, 4294934528, 4294901760, 4294836224, 4294705152, 4294443008, 4293918720, 4292870144, 4290772992, 4286578688, 4278190080, 4261412864, 4227858432, 4160749568, 4026531840, 3758096384, 3221225472, 2147483648, 0, 0, 0, 0, 0, 0, 0 ]
+      }
+   }
+   ATTRIBUTE "DU64BITS" {
+      DATATYPE  H5T_ARRAY { [8][64] H5T_STD_U64LE }
+      DATASPACE  SCALAR
+      DATA {
+      (0): [ 18446744073709551615, 18446744073709551614, 18446744073709551612, 18446744073709551608, 18446744073709551600, 18446744073709551584, 18446744073709551552, 18446744073709551488, 18446744073709551360, 18446744073709551104, 18446744073709550592, 18446744073709549568, 18446744073709547520, 18446744073709543424, 18446744073709535232, 18446744073709518848, 18446744073709486080, 18446744073709420544, 18446744073709289472, 18446744073709027328, 18446744073708503040, 18446744073707454464, 18446744073705357312, 18446744073701163008, 18446744073692774400, 18446744073675997184, 18446744073642442752, 18446744073575333888, 18446744073441116160, 18446744073172680704, 18446744072635809792, 18446744071562067968, 18446744069414584320, 18446744065119617024, 18446744056529682432, 18446744039349813248, 18446744004990074880, 18446743936270598144, 18446743798831644672, 18446743523953737728, 18446742974197923840, 18446741874686296064, 18446739675663040512, 18446735277616529408, 18446726481523507200, 18446708889337462784, 18446673704965373952, 18446603336221196288, 18446462598732840960, 18446181123756130304, 18445618173802708992, 18444492273895866368, 18442240474082181120, 18437736874454810624, 18428729675200069632, 18410715276690587648, 18374686479671623680, 18302628885633695744, 18158513697557839872, 17870283321406128128, 17293822569102704640, 16140901064495857664, 13835058055282163712, 9223372036854775808,
+            18446744073709551614, 18446744073709551612, 18446744073709551608, 18446744073709551600, 18446744073709551584, 18446744073709551552, 18446744073709551488, 18446744073709551360, 18446744073709551104, 18446744073709550592, 18446744073709549568, 18446744073709547520, 18446744073709543424, 18446744073709535232, 18446744073709518848, 18446744073709486080, 18446744073709420544, 18446744073709289472, 18446744073709027328, 18446744073708503040, 18446744073707454464, 18446744073705357312, 18446744073701163008, 18446744073692774400, 18446744073675997184, 18446744073642442752, 18446744073575333888, 18446744073441116160, 18446744073172680704, 18446744072635809792, 18446744071562067968, 18446744069414584320, 18446744065119617024, 18446744056529682432, 18446744039349813248, 18446744004990074880, 18446743936270598144, 18446743798831644672, 18446743523953737728, 18446742974197923840, 18446741874686296064, 18446739675663040512, 18446735277616529408, 18446726481523507200, 18446708889337462784, 18446673704965373952, 18446603336221196288, 18446462598732840960, 18446181123756130304, 18445618173802708992, 18444492273895866368, 18442240474082181120, 18437736874454810624, 18428729675200069632, 18410715276690587648, 18374686479671623680, 18302628885633695744, 18158513697557839872, 17870283321406128128, 17293822569102704640, 16140901064495857664, 13835058055282163712, 9223372036854775808, 0,
+            18446744073709551612, 18446744073709551608, 18446744073709551600, 18446744073709551584, 18446744073709551552, 18446744073709551488, 18446744073709551360, 18446744073709551104, 18446744073709550592, 18446744073709549568, 18446744073709547520, 18446744073709543424, 18446744073709535232, 18446744073709518848, 18446744073709486080, 18446744073709420544, 18446744073709289472, 18446744073709027328, 18446744073708503040, 18446744073707454464, 18446744073705357312, 18446744073701163008, 18446744073692774400, 18446744073675997184, 18446744073642442752, 18446744073575333888, 18446744073441116160, 18446744073172680704, 18446744072635809792, 18446744071562067968, 18446744069414584320, 18446744065119617024, 18446744056529682432, 18446744039349813248, 18446744004990074880, 18446743936270598144, 18446743798831644672, 18446743523953737728, 18446742974197923840, 18446741874686296064, 18446739675663040512, 18446735277616529408, 18446726481523507200, 18446708889337462784, 18446673704965373952, 18446603336221196288, 18446462598732840960, 18446181123756130304, 18445618173802708992, 18444492273895866368, 18442240474082181120, 18437736874454810624, 18428729675200069632, 18410715276690587648, 18374686479671623680, 18302628885633695744, 18158513697557839872, 17870283321406128128, 17293822569102704640, 16140901064495857664, 13835058055282163712, 9223372036854775808, 0, 0,
+            18446744073709551608, 18446744073709551600, 18446744073709551584, 18446744073709551552, 18446744073709551488, 18446744073709551360, 18446744073709551104, 18446744073709550592, 18446744073709549568, 18446744073709547520, 18446744073709543424, 18446744073709535232, 18446744073709518848, 18446744073709486080, 18446744073709420544, 18446744073709289472, 18446744073709027328, 18446744073708503040, 18446744073707454464, 18446744073705357312, 18446744073701163008, 18446744073692774400, 18446744073675997184, 18446744073642442752, 18446744073575333888, 18446744073441116160, 18446744073172680704, 18446744072635809792, 18446744071562067968, 18446744069414584320, 18446744065119617024, 18446744056529682432, 18446744039349813248, 18446744004990074880, 18446743936270598144, 18446743798831644672, 18446743523953737728, 18446742974197923840, 18446741874686296064, 18446739675663040512, 18446735277616529408, 18446726481523507200, 18446708889337462784, 18446673704965373952, 18446603336221196288, 18446462598732840960, 18446181123756130304, 18445618173802708992, 18444492273895866368, 18442240474082181120, 18437736874454810624, 18428729675200069632, 18410715276690587648, 18374686479671623680, 18302628885633695744, 18158513697557839872, 17870283321406128128, 17293822569102704640, 16140901064495857664, 13835058055282163712, 9223372036854775808, 0, 0, 0,
+            18446744073709551600, 18446744073709551584, 18446744073709551552, 18446744073709551488, 18446744073709551360, 18446744073709551104, 18446744073709550592, 18446744073709549568, 18446744073709547520, 18446744073709543424, 18446744073709535232, 18446744073709518848, 18446744073709486080, 18446744073709420544, 18446744073709289472, 18446744073709027328, 18446744073708503040, 18446744073707454464, 18446744073705357312, 18446744073701163008, 18446744073692774400, 18446744073675997184, 18446744073642442752, 18446744073575333888, 18446744073441116160, 18446744073172680704, 18446744072635809792, 18446744071562067968, 18446744069414584320, 18446744065119617024, 18446744056529682432, 18446744039349813248, 18446744004990074880, 18446743936270598144, 18446743798831644672, 18446743523953737728, 18446742974197923840, 18446741874686296064, 18446739675663040512, 18446735277616529408, 18446726481523507200, 18446708889337462784, 18446673704965373952, 18446603336221196288, 18446462598732840960, 18446181123756130304, 18445618173802708992, 18444492273895866368, 18442240474082181120, 18437736874454810624, 18428729675200069632, 18410715276690587648, 18374686479671623680, 18302628885633695744, 18158513697557839872, 17870283321406128128, 17293822569102704640, 16140901064495857664, 13835058055282163712, 9223372036854775808, 0, 0, 0, 0,
+            18446744073709551584, 18446744073709551552, 18446744073709551488, 18446744073709551360, 18446744073709551104, 18446744073709550592, 18446744073709549568, 18446744073709547520, 18446744073709543424, 18446744073709535232, 18446744073709518848, 18446744073709486080, 18446744073709420544, 18446744073709289472, 18446744073709027328, 18446744073708503040, 18446744073707454464, 18446744073705357312, 18446744073701163008, 18446744073692774400, 18446744073675997184, 18446744073642442752, 18446744073575333888, 18446744073441116160, 18446744073172680704, 18446744072635809792, 18446744071562067968, 18446744069414584320, 18446744065119617024, 18446744056529682432, 18446744039349813248, 18446744004990074880, 18446743936270598144, 18446743798831644672, 18446743523953737728, 18446742974197923840, 18446741874686296064, 18446739675663040512, 18446735277616529408, 18446726481523507200, 18446708889337462784, 18446673704965373952, 18446603336221196288, 18446462598732840960, 18446181123756130304, 18445618173802708992, 18444492273895866368, 18442240474082181120, 18437736874454810624, 18428729675200069632, 18410715276690587648, 18374686479671623680, 18302628885633695744, 18158513697557839872, 17870283321406128128, 17293822569102704640, 16140901064495857664, 13835058055282163712, 9223372036854775808, 0, 0, 0, 0, 0,
+            18446744073709551552, 18446744073709551488, 18446744073709551360, 18446744073709551104, 18446744073709550592, 18446744073709549568, 18446744073709547520, 18446744073709543424, 18446744073709535232, 18446744073709518848, 18446744073709486080, 18446744073709420544, 18446744073709289472, 18446744073709027328, 18446744073708503040, 18446744073707454464, 18446744073705357312, 18446744073701163008, 18446744073692774400, 18446744073675997184, 18446744073642442752, 18446744073575333888, 18446744073441116160, 18446744073172680704, 18446744072635809792, 18446744071562067968, 18446744069414584320, 18446744065119617024, 18446744056529682432, 18446744039349813248, 18446744004990074880, 18446743936270598144, 18446743798831644672, 18446743523953737728, 18446742974197923840, 18446741874686296064, 18446739675663040512, 18446735277616529408, 18446726481523507200, 18446708889337462784, 18446673704965373952, 18446603336221196288, 18446462598732840960, 18446181123756130304, 18445618173802708992, 18444492273895866368, 18442240474082181120, 18437736874454810624, 18428729675200069632, 18410715276690587648, 18374686479671623680, 18302628885633695744, 18158513697557839872, 17870283321406128128, 17293822569102704640, 16140901064495857664, 13835058055282163712, 9223372036854775808, 0, 0, 0, 0, 0, 0,
+            18446744073709551488, 18446744073709551360, 18446744073709551104, 18446744073709550592, 18446744073709549568, 18446744073709547520, 18446744073709543424, 18446744073709535232, 18446744073709518848, 18446744073709486080, 18446744073709420544, 18446744073709289472, 18446744073709027328, 18446744073708503040, 18446744073707454464, 18446744073705357312, 18446744073701163008, 18446744073692774400, 18446744073675997184, 18446744073642442752, 18446744073575333888, 18446744073441116160, 18446744073172680704, 18446744072635809792, 18446744071562067968, 18446744069414584320, 18446744065119617024, 18446744056529682432, 18446744039349813248, 18446744004990074880, 18446743936270598144, 18446743798831644672, 18446743523953737728, 18446742974197923840, 18446741874686296064, 18446739675663040512, 18446735277616529408, 18446726481523507200, 18446708889337462784, 18446673704965373952, 18446603336221196288, 18446462598732840960, 18446181123756130304, 18445618173802708992, 18444492273895866368, 18442240474082181120, 18437736874454810624, 18428729675200069632, 18410715276690587648, 18374686479671623680, 18302628885633695744, 18158513697557839872, 17870283321406128128, 17293822569102704640, 16140901064495857664, 13835058055282163712, 9223372036854775808, 0, 0, 0, 0, 0, 0, 0 ]
+      }
+   }
+   ATTRIBUTE "DummyDBL" {
+      DATATYPE  H5T_ARRAY { [8][8] H5T_IEEE_F64BE }
+      DATASPACE  SCALAR
+      DATA {
+      (0): [ 0, 1.17284e-90, 1.17284e-90, 1.05571e+165, 1.17284e-90, -3.23633e+292, 1.05571e+165, -3.55182e+37,
+            3.03865e-319, 3.71772e+239, -5.54961e+165, 8.81586e+91, -8.11368e+22, 1.28325e-51, -1.9407e-125, 2.0391e-194,
+            3.16202e-322, 4.49083e-30, 3.71772e+239, -6.38938e-104, -5.54961e+165, 9.82903e-178, 8.81586e+91, -9.79926e-247,
+            1.04347e-320, 4.49083e-30, 3.71772e+239, -6.38938e-104, -5.54961e+165, 9.82903e-178, 8.81586e+91, -9.79926e-247,
+            2.05531e-320, 2.30888e-169, 4.49083e-30, 1.26564e+105, 3.71772e+239, -3.43143e-243, -6.38938e-104, -1.85109e+31,
+            2.56124e-320, 2.30888e-169, 4.49083e-30, 1.26564e+105, 3.71772e+239, -3.43143e-243, -6.38938e-104, -1.85109e+31,
+            3.06716e-320, 2.30888e-169, 4.49083e-30, 1.26564e+105, 3.71772e+239, -3.43143e-243, -6.38938e-104, -1.85109e+31,
+            3.57308e-320, 2.30888e-169, 4.49083e-30, 1.26564e+105, 3.71772e+239, -3.43143e-243, -6.38938e-104, -1.85109e+31 ]
+      }
+   }
+}
+}
diff --git a/tools/testfiles/tscalarattrintsize.h5 b/tools/testfiles/tscalarattrintsize.h5
new file mode 100644
index 0000000..acf87e8
--- /dev/null
+++ b/tools/testfiles/tscalarattrintsize.h5
diff --git a/tools/testfiles/tscalarintsize.ddl b/tools/testfiles/tscalarintsize.ddl
new file mode 100644
index 0000000..b4d9c02
--- /dev/null
+++ b/tools/testfiles/tscalarintsize.ddl
@@ -0,0 +1,130 @@
+HDF5 "tscalarintsize.h5" {
+GROUP "/" {
+   DATASET "DS08BITS" {
+      DATATYPE  H5T_ARRAY { [8][8] H5T_STD_I8LE }
+      DATASPACE  SCALAR
+      DATA {
+      (0): [ -1, -2, -4, -8, -16, -32, -64, -128,
+            -2, -4, -8, -16, -32, -64, -128, 0,
+            -4, -8, -16, -32, -64, -128, 0, 0,
+            -8, -16, -32, -64, -128, 0, 0, 0,
+            -16, -32, -64, -128, 0, 0, 0, 0,
+            -32, -64, -128, 0, 0, 0, 0, 0,
+            -64, -128, 0, 0, 0, 0, 0, 0,
+            -128, 0, 0, 0, 0, 0, 0, 0 ]
+      }
+   }
+   DATASET "DS16BITS" {
+      DATATYPE  H5T_ARRAY { [8][16] H5T_STD_I16LE }
+      DATASPACE  SCALAR
+      DATA {
+      (0): [ -1, -2, -4, -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768,
+            -2, -4, -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, 0,
+            -4, -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, 0, 0,
+            -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, 0, 0, 0,
+            -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, 0, 0, 0, 0,
+            -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, 0, 0, 0, 0, 0,
+            -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, 0, 0, 0, 0, 0, 0,
+            -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, 0, 0, 0, 0, 0, 0, 0 ]
+      }
+   }
+   DATASET "DS32BITS" {
+      DATATYPE  H5T_ARRAY { [8][32] H5T_STD_I32LE }
+      DATASPACE  SCALAR
+      DATA {
+      (0): [ -1, -2, -4, -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648,
+            -2, -4, -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, 0,
+            -4, -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, 0, 0,
+            -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, 0, 0, 0,
+            -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, 0, 0, 0, 0,
+            -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, 0, 0, 0, 0, 0,
+            -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, 0, 0, 0, 0, 0, 0,
+            -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, 0, 0, 0, 0, 0, 0, 0 ]
+      }
+   }
+   DATASET "DS64BITS" {
+      DATATYPE  H5T_ARRAY { [8][64] H5T_STD_I64LE }
+      DATASPACE  SCALAR
+      DATA {
+      (0): [ -1, -2, -4, -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, -4294967296, -8589934592, -17179869184, -34359738368, -68719476736, -137438953472, -274877906944, -549755813888, -1099511627776, -2199023255552, -4398046511104, -8796093022208, -17592186044416, -35184372088832, -70368744177664, -140737488355328, -281474976710656, -562949953421312, -1125899906842624, -2251799813685248, -4503599627370496, -9007199254740992, -18014398509481984, -36028797018963968, -72057594037927936, -144115188075855872, -288230376151711744, -576460752303423488, -1152921504606846976, -2305843009213693952, -4611686018427387904, -9223372036854775808,
+            -2, -4, -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, -4294967296, -8589934592, -17179869184, -34359738368, -68719476736, -137438953472, -274877906944, -549755813888, -1099511627776, -2199023255552, -4398046511104, -8796093022208, -17592186044416, -35184372088832, -70368744177664, -140737488355328, -281474976710656, -562949953421312, -1125899906842624, -2251799813685248, -4503599627370496, -9007199254740992, -18014398509481984, -36028797018963968, -72057594037927936, -144115188075855872, -288230376151711744, -576460752303423488, -1152921504606846976, -2305843009213693952, -4611686018427387904, -9223372036854775808, 0,
+            -4, -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, -4294967296, -8589934592, -17179869184, -34359738368, -68719476736, -137438953472, -274877906944, -549755813888, -1099511627776, -2199023255552, -4398046511104, -8796093022208, -17592186044416, -35184372088832, -70368744177664, -140737488355328, -281474976710656, -562949953421312, -1125899906842624, -2251799813685248, -4503599627370496, -9007199254740992, -18014398509481984, -36028797018963968, -72057594037927936, -144115188075855872, -288230376151711744, -576460752303423488, -1152921504606846976, -2305843009213693952, -4611686018427387904, -9223372036854775808, 0, 0,
+            -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, -4294967296, -8589934592, -17179869184, -34359738368, -68719476736, -137438953472, -274877906944, -549755813888, -1099511627776, -2199023255552, -4398046511104, -8796093022208, -17592186044416, -35184372088832, -70368744177664, -140737488355328, -281474976710656, -562949953421312, -1125899906842624, -2251799813685248, -4503599627370496, -9007199254740992, -18014398509481984, -36028797018963968, -72057594037927936, -144115188075855872, -288230376151711744, -576460752303423488, -1152921504606846976, -2305843009213693952, -4611686018427387904, -9223372036854775808, 0, 0, 0,
+            -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, -4294967296, -8589934592, -17179869184, -34359738368, -68719476736, -137438953472, -274877906944, -549755813888, -1099511627776, -2199023255552, -4398046511104, -8796093022208, -17592186044416, -35184372088832, -70368744177664, -140737488355328, -281474976710656, -562949953421312, -1125899906842624, -2251799813685248, -4503599627370496, -9007199254740992, -18014398509481984, -36028797018963968, -72057594037927936, -144115188075855872, -288230376151711744, -576460752303423488, -1152921504606846976, -2305843009213693952, -4611686018427387904, -9223372036854775808, 0, 0, 0, 0,
+            -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, -4294967296, -8589934592, -17179869184, -34359738368, -68719476736, -137438953472, -274877906944, -549755813888, -1099511627776, -2199023255552, -4398046511104, -8796093022208, -17592186044416, -35184372088832, -70368744177664, -140737488355328, -281474976710656, -562949953421312, -1125899906842624, -2251799813685248, -4503599627370496, -9007199254740992, -18014398509481984, -36028797018963968, -72057594037927936, -144115188075855872, -288230376151711744, -576460752303423488, -1152921504606846976, -2305843009213693952, -4611686018427387904, -9223372036854775808, 0, 0, 0, 0, 0,
+            -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, -4294967296, -8589934592, -17179869184, -34359738368, -68719476736, -137438953472, -274877906944, -549755813888, -1099511627776, -2199023255552, -4398046511104, -8796093022208, -17592186044416, -35184372088832, -70368744177664, -140737488355328, -281474976710656, -562949953421312, -1125899906842624, -2251799813685248, -4503599627370496, -9007199254740992, -18014398509481984, -36028797018963968, -72057594037927936, -144115188075855872, -288230376151711744, -576460752303423488, -1152921504606846976, -2305843009213693952, -4611686018427387904, -9223372036854775808, 0, 0, 0, 0, 0, 0,
+            -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536, -131072, -262144, -524288, -1048576, -2097152, -4194304, -8388608, -16777216, -33554432, -67108864, -134217728, -268435456, -536870912, -1073741824, -2147483648, -4294967296, -8589934592, -17179869184, -34359738368, -68719476736, -137438953472, -274877906944, -549755813888, -1099511627776, -2199023255552, -4398046511104, -8796093022208, -17592186044416, -35184372088832, -70368744177664, -140737488355328, -281474976710656, -562949953421312, -1125899906842624, -2251799813685248, -4503599627370496, -9007199254740992, -18014398509481984, -36028797018963968, -72057594037927936, -144115188075855872, -288230376151711744, -576460752303423488, -1152921504606846976, -2305843009213693952, -4611686018427387904, -9223372036854775808, 0, 0, 0, 0, 0, 0, 0 ]
+      }
+   }
+   DATASET "DU08BITS" {
+      DATATYPE  H5T_ARRAY { [8][8] H5T_STD_U8LE }
+      DATASPACE  SCALAR
+      DATA {
+      (0): [ 255, 254, 252, 248, 240, 224, 192, 128,
+            254, 252, 248, 240, 224, 192, 128, 0,
+            252, 248, 240, 224, 192, 128, 0, 0,
+            248, 240, 224, 192, 128, 0, 0, 0,
+            240, 224, 192, 128, 0, 0, 0, 0,
+            224, 192, 128, 0, 0, 0, 0, 0,
+            192, 128, 0, 0, 0, 0, 0, 0,
+            128, 0, 0, 0, 0, 0, 0, 0 ]
+      }
+   }
+   DATASET "DU16BITS" {
+      DATATYPE  H5T_ARRAY { [8][16] H5T_STD_U16LE }
+      DATASPACE  SCALAR
+      DATA {
+      (0): [ 65535, 65534, 65532, 65528, 65520, 65504, 65472, 65408, 65280, 65024, 64512, 63488, 61440, 57344, 49152, 32768,
+            65534, 65532, 65528, 65520, 65504, 65472, 65408, 65280, 65024, 64512, 63488, 61440, 57344, 49152, 32768, 0,
+            65532, 65528, 65520, 65504, 65472, 65408, 65280, 65024, 64512, 63488, 61440, 57344, 49152, 32768, 0, 0,
+            65528, 65520, 65504, 65472, 65408, 65280, 65024, 64512, 63488, 61440, 57344, 49152, 32768, 0, 0, 0,
+            65520, 65504, 65472, 65408, 65280, 65024, 64512, 63488, 61440, 57344, 49152, 32768, 0, 0, 0, 0,
+            65504, 65472, 65408, 65280, 65024, 64512, 63488, 61440, 57344, 49152, 32768, 0, 0, 0, 0, 0,
+            65472, 65408, 65280, 65024, 64512, 63488, 61440, 57344, 49152, 32768, 0, 0, 0, 0, 0, 0,
+            65408, 65280, 65024, 64512, 63488, 61440, 57344, 49152, 32768, 0, 0, 0, 0, 0, 0, 0 ]
+      }
+   }
+   DATASET "DU32BITS" {
+      DATATYPE  H5T_ARRAY { [8][32] H5T_STD_U32LE }
+      DATASPACE  SCALAR
+      DATA {
+      (0): [ 4294967295, 4294967294, 4294967292, 4294967288, 4294967280, 4294967264, 4294967232, 4294967168, 4294967040, 4294966784, 4294966272, 4294965248, 4294963200, 4294959104, 4294950912, 4294934528, 4294901760, 4294836224, 4294705152, 4294443008, 4293918720, 4292870144, 4290772992, 4286578688, 4278190080, 4261412864, 4227858432, 4160749568, 4026531840, 3758096384, 3221225472, 2147483648,
+            4294967294, 4294967292, 4294967288, 4294967280, 4294967264, 4294967232, 4294967168, 4294967040, 4294966784, 4294966272, 4294965248, 4294963200, 4294959104, 4294950912, 4294934528, 4294901760, 4294836224, 4294705152, 4294443008, 4293918720, 4292870144, 4290772992, 4286578688, 4278190080, 4261412864, 4227858432, 4160749568, 4026531840, 3758096384, 3221225472, 2147483648, 0,
+            4294967292, 4294967288, 4294967280, 4294967264, 4294967232, 4294967168, 4294967040, 4294966784, 4294966272, 4294965248, 4294963200, 4294959104, 4294950912, 4294934528, 4294901760, 4294836224, 4294705152, 4294443008, 4293918720, 4292870144, 4290772992, 4286578688, 4278190080, 4261412864, 4227858432, 4160749568, 4026531840, 3758096384, 3221225472, 2147483648, 0, 0,
+            4294967288, 4294967280, 4294967264, 4294967232, 4294967168, 4294967040, 4294966784, 4294966272, 4294965248, 4294963200, 4294959104, 4294950912, 4294934528, 4294901760, 4294836224, 4294705152, 4294443008, 4293918720, 4292870144, 4290772992, 4286578688, 4278190080, 4261412864, 4227858432, 4160749568, 4026531840, 3758096384, 3221225472, 2147483648, 0, 0, 0,
+            4294967280, 4294967264, 4294967232, 4294967168, 4294967040, 4294966784, 4294966272, 4294965248, 4294963200, 4294959104, 4294950912, 4294934528, 4294901760, 4294836224, 4294705152, 4294443008, 4293918720, 4292870144, 4290772992, 4286578688, 4278190080, 4261412864, 4227858432, 4160749568, 4026531840, 3758096384, 3221225472, 2147483648, 0, 0, 0, 0,
+            4294967264, 4294967232, 4294967168, 4294967040, 4294966784, 4294966272, 4294965248, 4294963200, 4294959104, 4294950912, 4294934528, 4294901760, 4294836224, 4294705152, 4294443008, 4293918720, 4292870144, 4290772992, 4286578688, 4278190080, 4261412864, 4227858432, 4160749568, 4026531840, 3758096384, 3221225472, 2147483648, 0, 0, 0, 0, 0,
+            4294967232, 4294967168, 4294967040, 4294966784, 4294966272, 4294965248, 4294963200, 4294959104, 4294950912, 4294934528, 4294901760, 4294836224, 4294705152, 4294443008, 4293918720, 4292870144, 4290772992, 4286578688, 4278190080, 4261412864, 4227858432, 4160749568, 4026531840, 3758096384, 3221225472, 2147483648, 0, 0, 0, 0, 0, 0,
+            4294967168, 4294967040, 4294966784, 4294966272, 4294965248, 4294963200, 4294959104, 4294950912, 4294934528, 4294901760, 4294836224, 4294705152, 4294443008, 4293918720, 4292870144, 4290772992, 4286578688, 4278190080, 4261412864, 4227858432, 4160749568, 4026531840, 3758096384, 3221225472, 2147483648, 0, 0, 0, 0, 0, 0, 0 ]
+      }
+   }
+   DATASET "DU64BITS" {
+      DATATYPE  H5T_ARRAY { [8][64] H5T_STD_U64LE }
+      DATASPACE  SCALAR
+      DATA {
+      (0): [ 18446744073709551615, 18446744073709551614, 18446744073709551612, 18446744073709551608, 18446744073709551600, 18446744073709551584, 18446744073709551552, 18446744073709551488, 18446744073709551360, 18446744073709551104, 18446744073709550592, 18446744073709549568, 18446744073709547520, 18446744073709543424, 18446744073709535232, 18446744073709518848, 18446744073709486080, 18446744073709420544, 18446744073709289472, 18446744073709027328, 18446744073708503040, 18446744073707454464, 18446744073705357312, 18446744073701163008, 18446744073692774400, 18446744073675997184, 18446744073642442752, 18446744073575333888, 18446744073441116160, 18446744073172680704, 18446744072635809792, 18446744071562067968, 18446744069414584320, 18446744065119617024, 18446744056529682432, 18446744039349813248, 18446744004990074880, 18446743936270598144, 18446743798831644672, 18446743523953737728, 18446742974197923840, 18446741874686296064, 18446739675663040512, 18446735277616529408, 18446726481523507200, 18446708889337462784, 18446673704965373952, 18446603336221196288, 18446462598732840960, 18446181123756130304, 18445618173802708992, 18444492273895866368, 18442240474082181120, 18437736874454810624, 18428729675200069632, 18410715276690587648, 18374686479671623680, 18302628885633695744, 18158513697557839872, 17870283321406128128, 17293822569102704640, 16140901064495857664, 13835058055282163712, 9223372036854775808,
+            18446744073709551614, 18446744073709551612, 18446744073709551608, 18446744073709551600, 18446744073709551584, 18446744073709551552, 18446744073709551488, 18446744073709551360, 18446744073709551104, 18446744073709550592, 18446744073709549568, 18446744073709547520, 18446744073709543424, 18446744073709535232, 18446744073709518848, 18446744073709486080, 18446744073709420544, 18446744073709289472, 18446744073709027328, 18446744073708503040, 18446744073707454464, 18446744073705357312, 18446744073701163008, 18446744073692774400, 18446744073675997184, 18446744073642442752, 18446744073575333888, 18446744073441116160, 18446744073172680704, 18446744072635809792, 18446744071562067968, 18446744069414584320, 18446744065119617024, 18446744056529682432, 18446744039349813248, 18446744004990074880, 18446743936270598144, 18446743798831644672, 18446743523953737728, 18446742974197923840, 18446741874686296064, 18446739675663040512, 18446735277616529408, 18446726481523507200, 18446708889337462784, 18446673704965373952, 18446603336221196288, 18446462598732840960, 18446181123756130304, 18445618173802708992, 18444492273895866368, 18442240474082181120, 18437736874454810624, 18428729675200069632, 18410715276690587648, 18374686479671623680, 18302628885633695744, 18158513697557839872, 17870283321406128128, 17293822569102704640, 16140901064495857664, 13835058055282163712, 9223372036854775808, 0,
+            18446744073709551612, 18446744073709551608, 18446744073709551600, 18446744073709551584, 18446744073709551552, 18446744073709551488, 18446744073709551360, 18446744073709551104, 18446744073709550592, 18446744073709549568, 18446744073709547520, 18446744073709543424, 18446744073709535232, 18446744073709518848, 18446744073709486080, 18446744073709420544, 18446744073709289472, 18446744073709027328, 18446744073708503040, 18446744073707454464, 18446744073705357312, 18446744073701163008, 18446744073692774400, 18446744073675997184, 18446744073642442752, 18446744073575333888, 18446744073441116160, 18446744073172680704, 18446744072635809792, 18446744071562067968, 18446744069414584320, 18446744065119617024, 18446744056529682432, 18446744039349813248, 18446744004990074880, 18446743936270598144, 18446743798831644672, 18446743523953737728, 18446742974197923840, 18446741874686296064, 18446739675663040512, 18446735277616529408, 18446726481523507200, 18446708889337462784, 18446673704965373952, 18446603336221196288, 18446462598732840960, 18446181123756130304, 18445618173802708992, 18444492273895866368, 18442240474082181120, 18437736874454810624, 18428729675200069632, 18410715276690587648, 18374686479671623680, 18302628885633695744, 18158513697557839872, 17870283321406128128, 17293822569102704640, 16140901064495857664, 13835058055282163712, 9223372036854775808, 0, 0,
+            18446744073709551608, 18446744073709551600, 18446744073709551584, 18446744073709551552, 18446744073709551488, 18446744073709551360, 18446744073709551104, 18446744073709550592, 18446744073709549568, 18446744073709547520, 18446744073709543424, 18446744073709535232, 18446744073709518848, 18446744073709486080, 18446744073709420544, 18446744073709289472, 18446744073709027328, 18446744073708503040, 18446744073707454464, 18446744073705357312, 18446744073701163008, 18446744073692774400, 18446744073675997184, 18446744073642442752, 18446744073575333888, 18446744073441116160, 18446744073172680704, 18446744072635809792, 18446744071562067968, 18446744069414584320, 18446744065119617024, 18446744056529682432, 18446744039349813248, 18446744004990074880, 18446743936270598144, 18446743798831644672, 18446743523953737728, 18446742974197923840, 18446741874686296064, 18446739675663040512, 18446735277616529408, 18446726481523507200, 18446708889337462784, 18446673704965373952, 18446603336221196288, 18446462598732840960, 18446181123756130304, 18445618173802708992, 18444492273895866368, 18442240474082181120, 18437736874454810624, 18428729675200069632, 18410715276690587648, 18374686479671623680, 18302628885633695744, 18158513697557839872, 17870283321406128128, 17293822569102704640, 16140901064495857664, 13835058055282163712, 9223372036854775808, 0, 0, 0,
+            18446744073709551600, 18446744073709551584, 18446744073709551552, 18446744073709551488, 18446744073709551360, 18446744073709551104, 18446744073709550592, 18446744073709549568, 18446744073709547520, 18446744073709543424, 18446744073709535232, 18446744073709518848, 18446744073709486080, 18446744073709420544, 18446744073709289472, 18446744073709027328, 18446744073708503040, 18446744073707454464, 18446744073705357312, 18446744073701163008, 18446744073692774400, 18446744073675997184, 18446744073642442752, 18446744073575333888, 18446744073441116160, 18446744073172680704, 18446744072635809792, 18446744071562067968, 18446744069414584320, 18446744065119617024, 18446744056529682432, 18446744039349813248, 18446744004990074880, 18446743936270598144, 18446743798831644672, 18446743523953737728, 18446742974197923840, 18446741874686296064, 18446739675663040512, 18446735277616529408, 18446726481523507200, 18446708889337462784, 18446673704965373952, 18446603336221196288, 18446462598732840960, 18446181123756130304, 18445618173802708992, 18444492273895866368, 18442240474082181120, 18437736874454810624, 18428729675200069632, 18410715276690587648, 18374686479671623680, 18302628885633695744, 18158513697557839872, 17870283321406128128, 17293822569102704640, 16140901064495857664, 13835058055282163712, 9223372036854775808, 0, 0, 0, 0,
+            18446744073709551584, 18446744073709551552, 18446744073709551488, 18446744073709551360, 18446744073709551104, 18446744073709550592, 18446744073709549568, 18446744073709547520, 18446744073709543424, 18446744073709535232, 18446744073709518848, 18446744073709486080, 18446744073709420544, 18446744073709289472, 18446744073709027328, 18446744073708503040, 18446744073707454464, 18446744073705357312, 18446744073701163008, 18446744073692774400, 18446744073675997184, 18446744073642442752, 18446744073575333888, 18446744073441116160, 18446744073172680704, 18446744072635809792, 18446744071562067968, 18446744069414584320, 18446744065119617024, 18446744056529682432, 18446744039349813248, 18446744004990074880, 18446743936270598144, 18446743798831644672, 18446743523953737728, 18446742974197923840, 18446741874686296064, 18446739675663040512, 18446735277616529408, 18446726481523507200, 18446708889337462784, 18446673704965373952, 18446603336221196288, 18446462598732840960, 18446181123756130304, 18445618173802708992, 18444492273895866368, 18442240474082181120, 18437736874454810624, 18428729675200069632, 18410715276690587648, 18374686479671623680, 18302628885633695744, 18158513697557839872, 17870283321406128128, 17293822569102704640, 16140901064495857664, 13835058055282163712, 9223372036854775808, 0, 0, 0, 0, 0,
+            18446744073709551552, 18446744073709551488, 18446744073709551360, 18446744073709551104, 18446744073709550592, 18446744073709549568, 18446744073709547520, 18446744073709543424, 18446744073709535232, 18446744073709518848, 18446744073709486080, 18446744073709420544, 18446744073709289472, 18446744073709027328, 18446744073708503040, 18446744073707454464, 18446744073705357312, 18446744073701163008, 18446744073692774400, 18446744073675997184, 18446744073642442752, 18446744073575333888, 18446744073441116160, 18446744073172680704, 18446744072635809792, 18446744071562067968, 18446744069414584320, 18446744065119617024, 18446744056529682432, 18446744039349813248, 18446744004990074880, 18446743936270598144, 18446743798831644672, 18446743523953737728, 18446742974197923840, 18446741874686296064, 18446739675663040512, 18446735277616529408, 18446726481523507200, 18446708889337462784, 18446673704965373952, 18446603336221196288, 18446462598732840960, 18446181123756130304, 18445618173802708992, 18444492273895866368, 18442240474082181120, 18437736874454810624, 18428729675200069632, 18410715276690587648, 18374686479671623680, 18302628885633695744, 18158513697557839872, 17870283321406128128, 17293822569102704640, 16140901064495857664, 13835058055282163712, 9223372036854775808, 0, 0, 0, 0, 0, 0,
+            18446744073709551488, 18446744073709551360, 18446744073709551104, 18446744073709550592, 18446744073709549568, 18446744073709547520, 18446744073709543424, 18446744073709535232, 18446744073709518848, 18446744073709486080, 18446744073709420544, 18446744073709289472, 18446744073709027328, 18446744073708503040, 18446744073707454464, 18446744073705357312, 18446744073701163008, 18446744073692774400, 18446744073675997184, 18446744073642442752, 18446744073575333888, 18446744073441116160, 18446744073172680704, 18446744072635809792, 18446744071562067968, 18446744069414584320, 18446744065119617024, 18446744056529682432, 18446744039349813248, 18446744004990074880, 18446743936270598144, 18446743798831644672, 18446743523953737728, 18446742974197923840, 18446741874686296064, 18446739675663040512, 18446735277616529408, 18446726481523507200, 18446708889337462784, 18446673704965373952, 18446603336221196288, 18446462598732840960, 18446181123756130304, 18445618173802708992, 18444492273895866368, 18442240474082181120, 18437736874454810624, 18428729675200069632, 18410715276690587648, 18374686479671623680, 18302628885633695744, 18158513697557839872, 17870283321406128128, 17293822569102704640, 16140901064495857664, 13835058055282163712, 9223372036854775808, 0, 0, 0, 0, 0, 0, 0 ]
+      }
+   }
+   DATASET "DummyDBL" {
+      DATATYPE  H5T_ARRAY { [8][8] H5T_IEEE_F64BE }
+      DATASPACE  SCALAR
+      DATA {
+      (0): [ 0, 1.17284e-90, 1.17284e-90, 1.05571e+165, 1.17284e-90, -3.23633e+292, 1.05571e+165, -3.55182e+37,
+            3.03865e-319, 3.71772e+239, -5.54961e+165, 8.81586e+91, -8.11368e+22, 1.28325e-51, -1.9407e-125, 2.0391e-194,
+            3.16202e-322, 4.49083e-30, 3.71772e+239, -6.38938e-104, -5.54961e+165, 9.82903e-178, 8.81586e+91, -9.79926e-247,
+            1.04347e-320, 4.49083e-30, 3.71772e+239, -6.38938e-104, -5.54961e+165, 9.82903e-178, 8.81586e+91, -9.79926e-247,
+            2.05531e-320, 2.30888e-169, 4.49083e-30, 1.26564e+105, 3.71772e+239, -3.43143e-243, -6.38938e-104, -1.85109e+31,
+            2.56124e-320, 2.30888e-169, 4.49083e-30, 1.26564e+105, 3.71772e+239, -3.43143e-243, -6.38938e-104, -1.85109e+31,
+            3.06716e-320, 2.30888e-169, 4.49083e-30, 1.26564e+105, 3.71772e+239, -3.43143e-243, -6.38938e-104, -1.85109e+31,
+            3.57308e-320, 2.30888e-169, 4.49083e-30, 1.26564e+105, 3.71772e+239, -3.43143e-243, -6.38938e-104, -1.85109e+31 ]
+      }
+   }
+}
+}
diff --git a/tools/testfiles/tscalarintsize.h5 b/tools/testfiles/tscalarintsize.h5
new file mode 100644
index 0000000..9433401
--- /dev/null
+++ b/tools/testfiles/tscalarintsize.h5