[svn-r26867] svn merge -r26837:26866 https://svn.hdfgroup.uiuc.edu/hdf5/trunk

24 files changed, 396 insertions, 186 deletions

diff --git a/CMakeInstallation.cmake b/CMakeInstallation.cmake
index 0380adc..aa49cdc 100644
--- a/CMakeInstallation.cmake
+++ b/CMakeInstallation.cmake
@@ -139,7 +139,7 @@ configure_file (
 )
 install (
     FILES ${HDF5_BINARY_DIR}/libhdf5.settings
-    DESTINATION ${HDF5_INSTALL_CMAKE_DIR}
+    DESTINATION ${HDF5_INSTALL_LIB_DIR}
     COMPONENT libraries
 )
 
diff --git a/bin/cmakehdf5 b/bin/cmakehdf5
index 1f0fb7c..4842f45 100755
--- a/bin/cmakehdf5
+++ b/bin/cmakehdf5
@@ -23,6 +23,7 @@ makelog="#${progname}_2build.log"
 testlog="#${progname}_3test.log"
 packlog="#${progname}_4pack.log"
 installlog="#${progname}_5install.log"
+config_summary=libhdf5.settings
 exit_code=0
 
 # This command should be in the source directory's bin/
@@ -212,9 +213,9 @@ if [ $? != 0 ]; then
     echo $vers failed. Aborted.
     exit 1
 fi
-echo Running Cmake for HDF5-${version} ...
-
+echo Running Cmake for HDF5-${version} ...  
 #      4. Configure the C library, tools and tests with this command:
+#         If successful, append the configure summary to the configure logfile.
 STEP "Configure..." "cmake \
     -C $cacheinit \
     $build_cpp_lib \
@@ -225,7 +226,8 @@ STEP "Configure..." "cmake \
     $build_tools \
     $with_zlib \
     $with_szlib \
-    $srcdir" $configlog
+    $srcdir" $configlog &&\
+    cat $config_summary >> $configlog
       
 #      5. Build the C library, tools and tests with this command:
 STEP "Build the library, tools and tests, ..." "cmake --build . --config Release" $makelog
diff --git a/bin/h5vers b/bin/h5vers
index cb4b9e0..2aa8023 100755
--- a/bin/h5vers
+++ b/bin/h5vers
@@ -187,6 +187,10 @@ die "unable to read file: $RELEASE\n" unless -r $file;
 my $CONFIGURE = $file;
 $CONFIGURE =~ s/[^\/]*$/..\/configure.ac/;
 die "unable to read file: $CONFIGURE\n" unless -r $file;
+# cpp_doc_config
+my $CPP_DOC_CONFIG = $file;
+$CPP_DOC_CONFIG =~ s/[^\/]*$/..\/c++\/src\/cpp_doc_config/;
+die "unable to read file: $CPP_DOC_CONFIG\n"  unless -r $file;
 
 # Get the current version number.
 open FILE, $file or die "unable to open $file: $!\n";
@@ -234,7 +238,8 @@ if ($set) {
   $README = "";
   $RELEASE = "";
   $CONFIGURE = "";
-  $LT_VERS = "";
+  $CPP_DOC_CONFIG = "";
+  $LT_VERS = "";        
   @newver = @curver;
 }
 
@@ -309,6 +314,46 @@ if ($RELEASE) {
   close FILE;
 }
 
+# Update the c++/src/cpp_doc_config file
+if ($CPP_DOC_CONFIG) {
+  my $data = read_file($CPP_DOC_CONFIG);
+  my $version_string = sprintf("HDF5 version %d.%d.%d%s %s",
+                               @newver[0,1,2],
+                               $newver[3] eq "" ? "" : "-".$newver[3],
+                               "currently under development");
+
+  $data =~ s/PROJECT_NUMBER\s*=.*/PROJECT_NUMBER         = $version_string/;
+
+  write_file($CPP_DOC_CONFIG, $data);  
+}
+
+# helper function to read the file for updating c++/src/cpp_doc_config file.
+# The version string in that file is not at the top, so the string replacement
+# is not for the first line, and reading/writing the entire file as one string
+# facilitates the substring replacement.
+sub read_file {
+   my ($filename) = @_;
+
+    open my $in, $filename or die "Could not open '$filename' for reading $!";
+    local $/ = undef;
+    my $all = <$in>;
+    close $in;
+
+    return $all;
+}
+
+# helper function to write the file for updating c++/src/cpp_doc_config file.
+sub write_file {
+    my ($filename, $content) = @_;
+
+    open my $out, ">$filename" or die "Could not open '$filename' for writing $!";;
+    print $out $content;
+    close $out;
+
+    return;
+}
+
+
 sub gen_configure {
   my ($name, $conf) = @_;
 
diff --git a/c++/src/cpp_doc_config b/c++/src/cpp_doc_config
index f2caed2..7ea93f6 100644
--- a/c++/src/cpp_doc_config
+++ b/c++/src/cpp_doc_config
@@ -38,7 +38,7 @@ PROJECT_NAME           = "HDF5 C++ API"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 1.8.13
+PROJECT_NUMBER         = HDF5 version 1.9.216 currently under development
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/config/cmake/hdf5-config.cmake.in b/config/cmake/hdf5-config.cmake.in
index da5304d..667d3e6 100644
--- a/config/cmake/hdf5-config.cmake.in
+++ b/config/cmake/hdf5-config.cmake.in
@@ -105,20 +105,20 @@ endif ()
 list (REMOVE_DUPLICATES ${HDF5_PACKAGE_NAME}_FIND_COMPONENTS)
   foreach (comp IN LISTS ${HDF5_PACKAGE_NAME}_FIND_COMPONENTS)
     set (hdf5_comp2)
-    if (${comp} MATCHES "C")
+    if (${comp} STREQUAL "C")
       set (hdf5_comp "hdf5")
-    elseif (${comp} MATCHES "CXX")
+    elseif (${comp} STREQUAL "CXX")
       set (hdf5_comp "hdf5_cpp")
-    elseif (${comp} MATCHES "HL")
+    elseif (${comp} STREQUAL "HL")
       set (hdf5_comp "hdf5_hl")
-    elseif (${comp} MATCHES "CXX_HL")
+    elseif (${comp} STREQUAL "CXX_HL")
       set (hdf5_comp "hdf5_hl_cpp")
-    elseif (${comp} MATCHES "Tools")
+    elseif (${comp} STREQUAL "Tools")
       set (hdf5_comp "hdf5_tools")
-    elseif (${comp} MATCHES "Fortran")
+    elseif (${comp} STREQUAL "Fortran")
       set (hdf5_comp2 "hdf5_f90cstub")
       set (hdf5_comp "hdf5_fortran")
-    elseif (${comp} MATCHES "Fortran_HL")
+    elseif (${comp} STREQUAL "Fortran_HL")
       set (hdf5_comp2 "hdf5_hl_f90cstub")
       set (hdf5_comp "hdf5_hl_fortran")
     endif ()
@@ -133,17 +133,15 @@ list (REMOVE_DUPLICATES ${HDF5_PACKAGE_NAME}_FIND_COMPONENTS)
         else ()
           set (${HDF5_PACKAGE_NAME}_${comp}_FOUND 1)
           string(TOUPPER ${HDF5_PACKAGE_NAME}_${comp}_LIBRARY COMP_LIBRARY)
-          set (${COMP_LIBRARY} ${${COMP_LIBRARY}} ${hdf5_comp2} ${hdf5_comp})
+          set (${HDF5_PACKAGE_NAME}_LIBRARIES ${${HDF5_PACKAGE_NAME}_LIBRARIES} ${hdf5_comp2} ${hdf5_comp})
         endif ()
       else ()
         set (${HDF5_PACKAGE_NAME}_${comp}_FOUND 1)
         string(TOUPPER ${HDF5_PACKAGE_NAME}_${comp}_LIBRARY COMP_LIBRARY)
-        set (${COMP_LIBRARY} ${${COMP_LIBRARY}} ${hdf5_comp})
+        set (${HDF5_PACKAGE_NAME}_LIBRARIES ${${HDF5_PACKAGE_NAME}_LIBRARIES} ${hdf5_comp})
       endif ()
     endif ()
   endforeach ()
 
   check_required_components(${HDF5_PACKAGE_NAME}_FIND_COMPONENTS)
-
-set (${HDF5_PACKAGE_NAME}_LIBRARIES ${${COMP_LIBRARY}})
   
\ No newline at end of file
diff --git a/configure b/configure
index 136c200..603a9d4 100755
--- a/configure
+++ b/configure
@@ -7626,6 +7626,19 @@ fi
 
 
 ## ----------------------------------------------------------------------
+## Disable shared libraries on CYGWIN. (LK - 04/16/15)
+## A number of tests run by "make check" fail on CYGWIN, so for HDF5 v1.8.15
+## we will change the default for shared libraries to disabled.
+
+
+case "`uname`" in
+  CYGWIN*)
+    enable_shared="no"
+    CHECK_WARN="Shared libraries are not currently supported on CYGWIN."
+    ;;
+esac
+
+## ----------------------------------------------------------------------
 ## Fortran libraries are not currently supported on Mac. Disable them.
 ## (this is overridable with --enable-unsupported).
 ##
@@ -21377,6 +21390,8 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
 
+
+
 ## ----------------------------------------------------------------------
 ## Check if we should install only statically linked executables.
 ##   This check needs to occur after libtool is initialized because
@@ -33057,5 +33072,11 @@ cat >> src/H5config.h <<EOF
 #endif
 EOF
 
+## HDF5 configure code created by autotools with gcc 4.9.2 is adding problematic
+## linker flags:  -l with no library name; -l <libname>, specifically gfortran or m.
+## This sed script corrects "-l <libname>" first and then "-l " with no library name.
+## If the order is not preserved, all instances of "-l " will be removed.
+sed -e '/^postdeps/ s/-l \(a-zA-Z\)/-l\1/g' -e '/^postdeps/ s/-l //g' -i libtool
+
 ## show the configure settings
 cat src/libhdf5.settings
diff --git a/configure.ac b/configure.ac
index 14b4335..aaaceb3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -647,6 +647,19 @@ AC_SUBST([RUNPARALLEL])
 AC_SUBST([TESTPARALLEL])
 
 ## ----------------------------------------------------------------------
+## Disable shared libraries on CYGWIN. (LK - 04/16/15)
+## A number of tests run by "make check" fail on CYGWIN, so for HDF5 v1.8.15
+## we will change the default for shared libraries to disabled.
+
+
+case "`uname`" in
+  CYGWIN*)
+    enable_shared="no"
+    CHECK_WARN="Shared libraries are not currently supported on CYGWIN."
+    ;;
+esac
+
+## ----------------------------------------------------------------------
 ## Fortran libraries are not currently supported on Mac. Disable them.
 ## (this is overridable with --enable-unsupported).
 ##
@@ -697,6 +710,8 @@ LT_PREREQ([2.2])
 ## win32-dll - This will build clean dlls on win32 platforms.
 LT_INIT([dlopen,win32-dll])
 
+
+
 ## ----------------------------------------------------------------------
 ## Check if we should install only statically linked executables.
 ##   This check needs to occur after libtool is initialized because
@@ -2909,5 +2924,11 @@ cat >> src/H5config.h <<EOF
 #endif
 EOF
 
+## HDF5 configure code created by autotools with gcc 4.9.2 is adding problematic
+## linker flags:  -l with no library name; -l <libname>, specifically gfortran or m.
+## This sed script corrects "-l <libname>" first and then "-l " with no library name.
+## If the order is not preserved, all instances of "-l " will be removed.
+sed -e '/^postdeps/ s/-l \([a-zA-Z]\)/-l\1/g' -e '/^postdeps/ s/-l //g' -i libtool
+
 ## show the configure settings
 cat src/libhdf5.settings
diff --git a/release_docs/INSTALL_Cygwin.txt b/release_docs/INSTALL_Cygwin.txt
index 2b72cac..26d3cb9 100644
--- a/release_docs/INSTALL_Cygwin.txt
+++ b/release_docs/INSTALL_Cygwin.txt
@@ -34,7 +34,7 @@ Preconditions:
     
     The following compilers are supported by HDF5 and included in the Cygwin
     package system:
-       gcc (4.7.3), which includes:
+       gcc (4.7.3 and 4.9.2), which includes:
             gcc4-core    : C compiler
             gcc4-g++     : C++ compiler
             gcc4-fortran : fortran compiler
@@ -72,7 +72,6 @@ Preconditions:
       
        The latest supported public release of SZIP is available from
        ftp://ftp.hdfgroup.org/lib-external/szip/2.1.
-
     
     2.3 Additional Utilities
     
@@ -260,6 +259,11 @@ Build, Test and Install HDF5 on Cygwin
    dt_arith tests may fail due to the use of fork. This is a known issue
    with cygwin on Windows.
 
+   "make check" fails when building shared lib files is enabled.  The default
+   on Cygwin has been changed to disable shared.  It can be enabled with
+   the --enable-shared configure option but is likely to fail "make check" 
+   with GCC compilers.
+
 -----------------------------------------------------------------------
 
 Need Further assistance, email help@hdfgroup.org
diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index 4bc2667..a7ba365 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -1383,6 +1383,11 @@ The following platforms are not supported but have been tested for this release.
 
 Known Problems
 ==============
+* "make check" fails on CYGWIN when building shared lib files is enabled.  The
+   default on Cygwin has been changed to disable shared.  It can be enabled with
+   the --enable-shared configure option but is likely to fail "make check"
+   with GCC compilers. (LK -2015/04/16)
+
 * CLANG compiler with the options -fcatch-undefined-behavior and -ftrapv
   catches some undefined behavior in the alignment algorithm of the macro DETECT_I
   in H5detect.c (Issue 8147).  Since the algorithm is trying to detect the alignment 
diff --git a/src/H5AC.c b/src/H5AC.c
index 7ed5047..e6bcbb6 100644
--- a/src/H5AC.c
+++ b/src/H5AC.c
@@ -598,7 +598,7 @@ H5AC_dest(H5F_t *f, hid_t dxpl_id)
 #ifdef H5_HAVE_PARALLEL
     H5AC_aux_t * aux_ptr = NULL;
 #endif /* H5_HAVE_PARALLEL */
-    herr_t ret_value = SUCCEED;      /* Return value */
+    herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
diff --git a/src/H5ACprivate.h b/src/H5ACprivate.h
index ccecd83..0a958b0 100644
--- a/src/H5ACprivate.h
+++ b/src/H5ACprivate.h
@@ -42,6 +42,7 @@
 #define H5AC__TRACE_FILE_ENABLED	0
 #endif /* H5_METADATA_TRACE_FILE */
 
+/* Global metadata tag values */
 #define H5AC__INVALID_TAG      (haddr_t)0
 #define H5AC__IGNORE_TAG       (haddr_t)1
 #define H5AC__SUPERBLOCK_TAG   (haddr_t)2
diff --git a/src/H5Dchunk.c b/src/H5Dchunk.c
index 336aaf6..6c7c5d5 100644
--- a/src/H5Dchunk.c
+++ b/src/H5Dchunk.c
@@ -325,9 +325,7 @@ H5D__chunk_direct_write(const H5D_t *dset, hid_t dxpl_id, uint32_t filters, hsiz
     hsize_t chunk_idx;                  /* Global index of chunk */
     H5F_block_t old_chunk;              /* Offset/length of old chunk */
     H5D_chk_idx_info_t idx_info;        /* Chunked index info */
-    hbool_t     need_insert = FALSE;    /* Whether the chunk needs to be inserted into the index */
-    int         space_ndims;            /* Dataset's space rank */
-    hsize_t     space_dim[H5O_LAYOUT_NDIMS];    /* Dataset's dataspace dimensions */
+    hbool_t need_insert = FALSE;        /* Whether the chunk needs to be inserted into the index */
     herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_STATIC_TAG(dxpl_id, dset->oloc.addr, FAIL)
@@ -338,12 +336,8 @@ H5D__chunk_direct_write(const H5D_t *dset, hid_t dxpl_id, uint32_t filters, hsiz
         if(H5D__alloc_storage(dset, dxpl_id, H5D_ALLOC_WRITE, FALSE, NULL) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to initialize storage")
 
-    /* Retrieve the dataset dimensions */
-    if((space_ndims = H5S_get_simple_extent_dims(dset->shared->space, space_dim, NULL)) < 0)
-         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to get simple dataspace info")
-
     /* Calculate the index of this chunk */
-    if(H5VM_chunk_index((unsigned)space_ndims, offset,
+    if(H5VM_chunk_index(dset->shared->ndims, offset,
             layout->u.chunk.dim, layout->u.chunk.down_chunks, &chunk_idx) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't get chunk index")
 
@@ -382,7 +376,7 @@ H5D__chunk_direct_write(const H5D_t *dset, hid_t dxpl_id, uint32_t filters, hsiz
 
     /* Make sure the address of the chunk is returned. */
     if(!H5F_addr_defined(udata.chunk_block.offset))
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "chunk address isn't defined")
+        HGOTO_ERROR(H5E_DATASET, H5E_BADVALUE, FAIL, "chunk address isn't defined")
 
     /* Evict the (old) entry from the cache if present, but do not flush
      * it to disk */
@@ -475,23 +469,15 @@ done:
 herr_t
 H5D__chunk_set_info(const H5D_t *dset)
 {
-    hsize_t curr_dims[H5O_LAYOUT_NDIMS];    /* Curr. size of dataset dimensions */
-    int sndims;                 /* Rank of dataspace */
-    unsigned ndims;             /* Rank of dataspace */
-    herr_t ret_value = SUCCEED; /* Return value */
+    herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_PACKAGE
 
     /* Sanity checks */
     HDassert(dset);
 
-    /* Get the dim info for dataset */
-    if((sndims = H5S_get_simple_extent_dims(dset->shared->space, curr_dims, NULL)) < 0)
-	HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get dataspace dimensions")
-    H5_ASSIGN_OVERFLOW(ndims, sndims, int, unsigned);
-
     /* Set the base layout information */
-    if(H5D__chunk_set_info_real(&dset->shared->layout.u.chunk, ndims, curr_dims) < 0)
+    if(H5D__chunk_set_info_real(&dset->shared->layout.u.chunk, dset->shared->ndims, dset->shared->curr_dims) < 0)
 	HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set layout's chunk info")
 
     /* Call the index's "resize" callback */
@@ -519,10 +505,7 @@ static herr_t
 H5D__chunk_construct(H5F_t UNUSED *f, H5D_t *dset)
 {
     const H5T_t *type = dset->shared->type;      /* Convenience pointer to dataset's datatype */
-    hsize_t max_dims[H5O_LAYOUT_NDIMS];          /* Maximum size of data in elements */
-    hsize_t dims[H5O_LAYOUT_NDIMS];              /* Dimension size of data in elements */
     uint64_t chunk_size;        /* Size of chunk in bytes */
-    int ndims;                  /* Rank of dataspace */
     unsigned u;                 /* Local index variable */
     herr_t ret_value = SUCCEED; /* Return value */
 
@@ -537,9 +520,7 @@ H5D__chunk_construct(H5F_t UNUSED *f, H5D_t *dset)
         HGOTO_ERROR(H5E_DATASET, H5E_BADVALUE, FAIL, "no chunk information set?")
 
     /* Set up layout information */
-    if((ndims = H5S_GET_EXTENT_NDIMS(dset->shared->space)) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "unable to get rank")
-    if(dset->shared->layout.u.chunk.ndims != (unsigned)ndims)
+    if(dset->shared->layout.u.chunk.ndims != dset->shared->ndims)
         HGOTO_ERROR(H5E_DATASET, H5E_BADVALUE, FAIL, "dimensionality of chunks doesn't match the dataspace")
 
     /* Increment # of chunk dimensions, to account for datatype size as last element */
@@ -553,10 +534,6 @@ H5D__chunk_construct(H5F_t UNUSED *f, H5D_t *dset)
     /* Set the last dimension of the chunk size to the size of the datatype */
     dset->shared->layout.u.chunk.dim[dset->shared->layout.u.chunk.ndims - 1] = (uint32_t)H5T_GET_SIZE(type);
 
-    /* Get local copy of dataset dimensions (for sanity checking) */
-    if(H5S_get_simple_extent_dims(dset->shared->space, dims, max_dims) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to query maximum dimensions")
-
     /* Sanity check dimensions */
     for(u = 0; u < dset->shared->layout.u.chunk.ndims - 1; u++) {
         /* Don't allow zero-sized chunk dimensions */
@@ -568,7 +545,7 @@ H5D__chunk_construct(H5F_t UNUSED *f, H5D_t *dset)
          * the maximum dimension size. If any dimension size is zero, there
          * will be no such restriction.
          */
-        if(dims[u] && max_dims[u] != H5S_UNLIMITED && max_dims[u] < dset->shared->layout.u.chunk.dim[u])
+        if(dset->shared->curr_dims[u] && dset->shared->max_dims[u] != H5S_UNLIMITED && dset->shared->max_dims[u] < dset->shared->layout.u.chunk.dim[u])
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "chunk size must be <= maximum dimension size for fixed-sized dimensions")
     } /* end for */
 
@@ -745,10 +722,8 @@ H5D__chunk_io_init(const H5D_io_info_t *io_info, const H5D_type_info_t *type_inf
     /* Set the number of dimensions for the memory dataspace */
     H5_ASSIGN_OVERFLOW(fm->m_ndims, sm_ndims, int, unsigned);
 
-    /* Get dim number and dimensionality for each dataspace */
+    /* Get rank for file dataspace */
     fm->f_ndims = f_ndims = dataset->shared->layout.u.chunk.ndims - 1;
-    if(H5S_get_simple_extent_dims(file_space, fm->f_dims, NULL) < 0)
-        HGOTO_ERROR(H5E_DATASPACE, H5E_CANTGET, FAIL, "unable to get dimensionality")
 
     /* Normalize hyperslab selections by adjusting them by the offset */
     /* (It might be worthwhile to normalize both the file and memory dataspaces
@@ -2548,7 +2523,7 @@ H5D__chunk_flush_entry(const H5D_t *dset, hid_t dxpl_id, const H5D_dxpl_cache_t
                 point_of_no_return = TRUE;
                 ent->chunk = NULL;
             } /* end else */
-            H5_ASSIGN_OVERFLOW(nbytes, udata.chunk_block.length, uint32_t, size_t);
+            H5_ASSIGN_OVERFLOW(nbytes, udata.chunk_block.length, hsize_t, size_t);
             if(H5Z_pipeline(&(dset->shared->dcpl_cache.pline), 0, &(udata.filter_mask), dxpl_cache->err_detect,
                      dxpl_cache->filter_cb, &nbytes, &alloc, &buf) < 0)
                 HGOTO_ERROR(H5E_PLINE, H5E_CANTFILTER, FAIL, "output pipeline failed")
@@ -2557,7 +2532,7 @@ H5D__chunk_flush_entry(const H5D_t *dset, hid_t dxpl_id, const H5D_dxpl_cache_t
             if(nbytes > ((size_t)0xffffffff))
                 HGOTO_ERROR(H5E_DATASET, H5E_BADRANGE, FAIL, "chunk too large for 32-bit length")
 #endif /* H5_SIZEOF_SIZE_T > 4 */
-            H5_ASSIGN_OVERFLOW(udata.chunk_block.length, nbytes, size_t, uint32_t);
+            H5_ASSIGN_OVERFLOW(udata.chunk_block.length, nbytes, size_t, hsize_t);
 
             /* Indicate that the chunk must be allocated */
             must_alloc = TRUE;
@@ -2590,7 +2565,8 @@ H5D__chunk_flush_entry(const H5D_t *dset, hid_t dxpl_id, const H5D_dxpl_cache_t
 
         /* Write the data to the file */
         HDassert(H5F_addr_defined(udata.chunk_block.offset));
-        if(H5F_block_write(dset->oloc.file, H5FD_MEM_DRAW, udata.chunk_block.offset, udata.chunk_block.length, dxpl_id, buf) < 0)
+        H5_CHECK_OVERFLOW(udata.chunk_block.length, hsize_t, size_t);
+        if(H5F_block_write(dset->oloc.file, H5FD_MEM_DRAW, udata.chunk_block.offset, (size_t)udata.chunk_block.length, dxpl_id, buf) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "unable to write raw data to file")
 
         /* Insert the chunk record into the index */
@@ -3299,8 +3275,8 @@ H5D__chunk_allocate(const H5D_t *dset, hid_t dxpl_id, hbool_t full_overwrite,
     H5D_chunk_coll_info_t chunk_info; /* chunk address information for doing I/O */
 #endif /* H5_HAVE_PARALLEL */
     hbool_t	carry;          /* Flag to indicate that chunk increment carrys to higher dimension (sorta) */
-    int         space_ndims;    /* Dataset's space rank */
-    hsize_t     space_dim[H5O_LAYOUT_NDIMS];    /* Dataset's dataspace dimensions */
+    unsigned    space_ndims;    /* Dataset's space rank */
+    const hsize_t *space_dim;   /* Dataset's dataspace dimensions */
     const uint32_t *chunk_dim = layout->u.chunk.dim; /* Convenience pointer to chunk dimensions */
     unsigned    op_dim;                 /* Current operating dimension */
     H5D_fill_buf_info_t fb_info;        /* Dataset's fill buffer info */
@@ -3315,9 +3291,8 @@ H5D__chunk_allocate(const H5D_t *dset, hid_t dxpl_id, hbool_t full_overwrite,
     HDassert(TRUE == H5P_isa_class(dxpl_id, H5P_DATASET_XFER));
 
     /* Retrieve the dataset dimensions */
-    if((space_ndims = H5S_get_simple_extent_dims(dset->shared->space, space_dim, NULL)) < 0)
-         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to get simple dataspace info")
-    space_dim[space_ndims] = layout->u.chunk.dim[space_ndims];
+    space_dim = dset->shared->curr_dims;
+    space_ndims = dset->shared->ndims;
 
     /* The last dimension in chunk_offset is always 0 */
     chunk_offset[space_ndims] = (hsize_t)0;
@@ -3431,7 +3406,7 @@ H5D__chunk_allocate(const H5D_t *dset, hid_t dxpl_id, hbool_t full_overwrite,
      * certain dimension, max_unalloc is updated in order to avoid allocating
      * those chunks again.
      */
-    for(op_dim = 0; op_dim < (unsigned)space_ndims; op_dim++) {
+    for(op_dim = 0; op_dim < space_ndims; op_dim++) {
         H5D_chunk_ud_t udata;   /* User data for querying chunk info */
         int i;                  /* Local index variable */
 
@@ -3440,7 +3415,7 @@ H5D__chunk_allocate(const H5D_t *dset, hid_t dxpl_id, hbool_t full_overwrite,
             continue;
         else {
             /* Reset the chunk offset indices */
-            HDmemset(chunk_offset, 0, ((unsigned)space_ndims * sizeof(chunk_offset[0])));
+            HDmemset(chunk_offset, 0, (space_ndims * sizeof(chunk_offset[0])));
             chunk_offset[op_dim] = min_unalloc[op_dim];
 
             carry = FALSE;
@@ -3458,7 +3433,7 @@ H5D__chunk_allocate(const H5D_t *dset, hid_t dxpl_id, hbool_t full_overwrite,
                 hsize_t chunk_idx;
 
                 /* Calculate the index of this chunk */
-                if(H5VM_chunk_index((unsigned)space_ndims, chunk_offset,
+                if(H5VM_chunk_index(space_ndims, chunk_offset,
                         layout->u.chunk.dim, layout->u.chunk.down_chunks,
                         &chunk_idx) < 0)
                     HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't get chunk index")
@@ -3475,7 +3450,7 @@ H5D__chunk_allocate(const H5D_t *dset, hid_t dxpl_id, hbool_t full_overwrite,
                 unsigned u;             /* Local index variable */
                 hbool_t outside_orig = FALSE;
 
-                for(u = 0; u < (unsigned)space_ndims; u++) {
+                for(u = 0; u < space_ndims; u++) {
                     HDassert(chunk_offset[u] < space_dim[u]);
                     if(chunk_offset[u] >= old_dim[u])
                         outside_orig = TRUE;
@@ -4020,14 +3995,13 @@ H5D__chunk_prune_by_extent(H5D_t *dset, hid_t dxpl_id, const hsize_t *old_dim)
     const H5O_layout_t     *layout = &(dset->shared->layout);   /* Dataset's layout */
     const H5D_rdcc_t       *rdcc = &(dset->shared->cache.chunk);	/*raw data chunk cache */
     H5D_rdcc_ent_t         *ent = NULL;	        /* Cache entry  */
-    int                     space_ndims;        /* Dataset's space rank */
-    hsize_t                 space_dim[H5O_LAYOUT_NDIMS]; /* Current dataspace dimensions */
+    unsigned                space_ndims;        /* Dataset's space rank */
+    const hsize_t          *space_dim;          /* Current dataspace dimensions */
     unsigned                op_dim;             /* Current operating dimension */
     hbool_t                 shrunk_dim[H5O_LAYOUT_NDIMS]; /* Dimensions which have shrunk */
     H5D_chunk_it_ud1_t      udata;      /* Chunk index iterator user data */
     hbool_t                 udata_init = FALSE; /* Whether the chunk index iterator user data has been initialized */
     H5D_chunk_common_ud_t   idx_udata;          /* User data for index removal routine */
-    H5D_chunk_ud_t          chk_udata;          /* User data for getting chunk info */
     H5S_t                  *chunk_space = NULL;         /* Dataspace for a chunk */
     hsize_t                 chunk_dim[H5O_LAYOUT_NDIMS];   /* Chunk dimensions */
     hsize_t                 chunk_offset[H5O_LAYOUT_NDIMS]; /* Offset of current chunk */
@@ -4049,10 +4023,8 @@ H5D__chunk_prune_by_extent(H5D_t *dset, hid_t dxpl_id, const hsize_t *old_dim)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't fill dxpl cache")
 
     /* Go get the rank & dimensions (including the element size) */
-    if((space_ndims = H5S_get_simple_extent_dims(dset->shared->space, space_dim,
-            NULL)) < 0)
-	HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get dataset dimensions")
-    space_dim[space_ndims] = layout->u.chunk.dim[space_ndims];
+    space_dim = dset->shared->curr_dims;
+    space_ndims = dset->shared->ndims;
 
     /* The last dimension in chunk_offset is always 0 */
     chunk_offset[space_ndims] = (hsize_t)0;
@@ -4071,14 +4043,14 @@ H5D__chunk_prune_by_extent(H5D_t *dset, hid_t dxpl_id, const hsize_t *old_dim)
     /* (also copy the chunk dimensions into 'hsize_t' array for creating dataspace) */
     /* (also compute the dimensions which have been shrunk) */
     elmts_per_chunk = 1;
-    for(u = 0; u < (unsigned)space_ndims; u++) {
+    for(u = 0; u < space_ndims; u++) {
         elmts_per_chunk *= layout->u.chunk.dim[u];
 	chunk_dim[u] = layout->u.chunk.dim[u];
 	shrunk_dim[u] = space_dim[u] < old_dim[u];
     } /* end for */
 
     /* Create a dataspace for a chunk & set the extent */
-    if(NULL == (chunk_space = H5S_create_simple((unsigned)space_ndims, chunk_dim, NULL)))
+    if(NULL == (chunk_space = H5S_create_simple(space_ndims, chunk_dim, NULL)))
 	HGOTO_ERROR(H5E_DATASPACE, H5E_CANTCREATE, FAIL, "can't create simple dataspace")
 
     /* Reset hyperslab start array */
@@ -4162,7 +4134,7 @@ H5D__chunk_prune_by_extent(H5D_t *dset, hid_t dxpl_id, const hsize_t *old_dim)
     if(has_fill)
         for(ent = rdcc->head; ent; ent = ent->next)
             /* Check for chunk offset outside of new dimensions */
-            for(u = 0; u < (unsigned)space_ndims; u++)
+            for(u = 0; u < space_ndims; u++)
                 if((hsize_t)ent->offset[u] >= space_dim[u]) {
                     /* Mark the entry as "deleted" */
                     ent->deleted = TRUE;
@@ -4178,12 +4150,12 @@ H5D__chunk_prune_by_extent(H5D_t *dset, hid_t dxpl_id, const hsize_t *old_dim)
             HDassert((hsize_t) max_mod_chunk_off[op_dim] >= min_mod_chunk_off[op_dim]);
 
             /* Reset the chunk offset indices */
-            HDmemset(chunk_offset, 0, ((unsigned)space_ndims * sizeof(chunk_offset[0])));
+            HDmemset(chunk_offset, 0, (space_ndims * sizeof(chunk_offset[0])));
             chunk_offset[op_dim] = min_mod_chunk_off[op_dim];
 
             /* Initialize "dims_outside_fill" array */
             ndims_outside_fill = 0;
-            for(u = 0; u < (unsigned)space_ndims; u++)
+            for(u = 0; u < space_ndims; u++)
                 if((hssize_t)chunk_offset[u] > max_fill_chunk_off[u]) {
                     dims_outside_fill[u] = TRUE;
                     ndims_outside_fill++;
@@ -4198,7 +4170,7 @@ H5D__chunk_prune_by_extent(H5D_t *dset, hid_t dxpl_id, const hsize_t *old_dim)
             int i;	                        /* Local index variable */
 
             /* Calculate the index of this chunk */
-            if(H5VM_chunk_index((unsigned)space_ndims, chunk_offset,
+            if(H5VM_chunk_index(space_ndims, chunk_offset,
                     layout->u.chunk.dim, layout->u.chunk.down_chunks,
                     &(chk_io_info.store->chunk.index)) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't get chunk index")
@@ -4212,12 +4184,14 @@ H5D__chunk_prune_by_extent(H5D_t *dset, hid_t dxpl_id, const hsize_t *old_dim)
                     HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "unable to write fill value")
             } /* end if */
             else {
+                H5D_chunk_ud_t          chk_udata;          /* User data for getting chunk info */
+
 #ifndef NDEBUG
                 /* Make sure this chunk is really outside the new dimensions */
                 {
                     hbool_t outside_dim = FALSE;
 
-                    for(u = 0; u < (unsigned)space_ndims; u++)
+                    for(u = 0; u < space_ndims; u++)
                         if(chunk_offset[u] >= space_dim[u]) {
                             outside_dim = TRUE;
                             break;
@@ -4503,7 +4477,7 @@ H5D__chunk_update_cache(H5D_t *dset, hid_t dxpl_id)
     HDassert(dset->shared->layout.u.chunk.ndims > 0 && dset->shared->layout.u.chunk.ndims <= H5O_LAYOUT_NDIMS);
 
     /* Get the rank */
-    rank = dset->shared->layout.u.chunk.ndims-1;
+    rank = dset->shared->layout.u.chunk.ndims - 1;
     HDassert(rank > 0);
 
     /* 1-D dataset's chunks can't have their index change */
diff --git a/src/H5Dcompact.c b/src/H5Dcompact.c
index 789beab..1d8b97c 100644
--- a/src/H5Dcompact.c
+++ b/src/H5Dcompact.c
@@ -174,11 +174,8 @@ H5D__compact_construct(H5F_t *f, H5D_t *dset)
     hssize_t stmp_size;         /* Temporary holder for raw data size */
     hsize_t tmp_size;           /* Temporary holder for raw data size */
     hsize_t max_comp_data_size; /* Max. allowed size of compact data */
-    hsize_t dim[H5O_LAYOUT_NDIMS];      /* Current size of data in elements */
-    hsize_t max_dim[H5O_LAYOUT_NDIMS];  /* Maximum size of data in elements */
-    int ndims;                          /* Rank of dataspace */
-    int i;                              /* Local index variable */
-    herr_t ret_value = SUCCEED;         /* Return value */
+    unsigned u;                 /* Local index variable */
+    herr_t ret_value = SUCCEED; /* Return value */
 
     FUNC_ENTER_STATIC
 
@@ -187,11 +184,9 @@ H5D__compact_construct(H5F_t *f, H5D_t *dset)
     HDassert(dset);
 
     /* Check for invalid dataset dimensions */
-    if((ndims = H5S_get_simple_extent_dims(dset->shared->space, dim, max_dim)) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get dataspace dimensions")
-    for(i = 0; i < ndims; i++)
-        if(max_dim[i] > dim[i])
-            HGOTO_ERROR(H5E_DATASET, H5E_UNSUPPORTED, FAIL, "extendible compact dataset")
+    for(u = 0; u < dset->shared->ndims; u++)
+        if(dset->shared->max_dims[u] > dset->shared->curr_dims[u])
+            HGOTO_ERROR(H5E_DATASET, H5E_UNSUPPORTED, FAIL, "extendible compact dataset not allowed")
 
     /*
      * Compact dataset is stored in dataset object header message of
diff --git a/src/H5Dcontig.c b/src/H5Dcontig.c
index dc09768..e913a3f 100644
--- a/src/H5Dcontig.c
+++ b/src/H5Dcontig.c
@@ -396,10 +396,7 @@ H5D__contig_construct(H5F_t *f, H5D_t *dset)
     size_t dt_size;                     /* Size of datatype */
     hsize_t tmp_size;                   /* Temporary holder for raw data size */
     size_t tmp_sieve_buf_size;          /* Temporary holder for sieve buffer size */
-    hsize_t dim[H5O_LAYOUT_NDIMS];	/* Current size of data in elements */
-    hsize_t max_dim[H5O_LAYOUT_NDIMS];  /* Maximum size of data in elements */
-    int ndims;                          /* Rank of dataspace */
-    int i;                              /* Local index variable */
+    unsigned u;                         /* Local index variable */
     herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_STATIC
@@ -415,11 +412,9 @@ H5D__contig_construct(H5F_t *f, H5D_t *dset)
      */
 
     /* Check for invalid dataset dimensions */
-    if((ndims = H5S_get_simple_extent_dims(dset->shared->space, dim, max_dim)) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to initialize contiguous storage")
-    for(i = 0; i < ndims; i++)
-        if(max_dim[i] > dim[i])
-            HGOTO_ERROR(H5E_DATASET, H5E_UNSUPPORTED, FAIL, "extendible contiguous non-external dataset")
+    for(u = 0; u < dset->shared->ndims; u++)
+        if(dset->shared->max_dims[u] > dset->shared->curr_dims[u])
+            HGOTO_ERROR(H5E_DATASET, H5E_UNSUPPORTED, FAIL, "extendible contiguous non-external dataset not allowed")
 
     /* Retrieve the number of elements in the dataspace */
     if((snelmts = H5S_GET_EXTENT_NPOINTS(dset->shared->space)) < 0)
diff --git a/src/H5Ddeprec.c b/src/H5Ddeprec.c
index 0b2fee6..b3dae7b 100644
--- a/src/H5Ddeprec.c
+++ b/src/H5Ddeprec.c
@@ -341,9 +341,7 @@ static herr_t
 H5D__extend(H5D_t *dataset, const hsize_t *size, hid_t dxpl_id)
 {
     htri_t changed;                     /* Flag to indicate that the dataspace was successfully extended */
-    H5S_t *space;                       /* Dataset's dataspace */
-    int     rank;                       /* Dataspace # of dimensions */
-    hsize_t curr_dims[H5O_LAYOUT_NDIMS];/* Current dimension sizes */
+    hsize_t old_dims[H5S_MAX_RANK];     /* Current (i.e. old, if changed) dimension sizes */
     H5O_fill_t *fill;                   /* Dataset's fill value */
     herr_t ret_value = SUCCEED;         /* Return value */
 
@@ -364,20 +362,30 @@ H5D__extend(H5D_t *dataset, const hsize_t *size, hid_t dxpl_id)
      */
 
     /* Retrieve the current dimensions */
-    space = dataset->shared->space;
-    if((rank = H5S_get_simple_extent_dims(space, curr_dims, NULL)) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get dataset dimensions")
+    HDcompile_assert(sizeof(old_dims) == sizeof(dataset->shared->curr_dims));
+    HDmemcpy(old_dims, dataset->shared->curr_dims, H5S_MAX_RANK * sizeof(old_dims[0]));
 
     /* Increase the size of the data space */
-    if((changed = H5S_extend(space, size)) < 0)
-	HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to increase size of data space")
+    if((changed = H5S_extend(dataset->shared->space, size)) < 0)
+	HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to increase size of dataspace")
 
     /* Updated the dataset's info if the dataspace was successfully extended */
     if(changed) {
+        /* Get the extended dimension sizes */
+        /* (Need to retrieve this here, since the 'size' dimensions could
+         *  extend one dimension but be smaller in a different dimension,
+         *  and the dataspace's extent is the larger of the current and
+         *  'size' dimension values. - QAK)
+         */
+        if(H5S_get_simple_extent_dims(dataset->shared->space, dataset->shared->curr_dims, NULL) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get dataset dimensions")
+
         /* Update the index values for the cached chunks for this dataset */
         if(H5D_CHUNKED == dataset->shared->layout.type) {
+            /* Update general information for chunks */
             if(H5D__chunk_set_info(dataset) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "unable to update # of chunks")
+            /* Update the chunk cache indices */
             if(H5D__chunk_update_cache(dataset, dxpl_id) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "unable to update cached chunk indices")
         } /* end if */
@@ -385,8 +393,7 @@ H5D__extend(H5D_t *dataset, const hsize_t *size, hid_t dxpl_id)
 	/* Allocate space for the new parts of the dataset, if appropriate */
         fill = &dataset->shared->dcpl_cache.fill;
         if(fill->alloc_time == H5D_ALLOC_TIME_EARLY)
-            if(H5D__alloc_storage(dataset, dxpl_id, H5D_ALLOC_EXTEND, FALSE,
-                    curr_dims) < 0)
+            if(H5D__alloc_storage(dataset, dxpl_id, H5D_ALLOC_EXTEND, FALSE, old_dims) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to initialize dataset with fill value")
 
         /* Mark the dataspace as dirty, for later writing to the file */
diff --git a/src/H5Defl.c b/src/H5Defl.c
index 38c8ccd..355492f 100644
--- a/src/H5Defl.c
+++ b/src/H5Defl.c
@@ -126,14 +126,11 @@ static herr_t
 H5D__efl_construct(H5F_t *f, H5D_t *dset)
 {
     size_t dt_size;                     /* Size of datatype */
-    hsize_t dim[H5O_LAYOUT_NDIMS];	/* Current size of data in elements */
-    hsize_t max_dim[H5O_LAYOUT_NDIMS];  /* Maximum size of data in elements */
     hssize_t stmp_size;                 /* Temporary holder for raw data size */
     hsize_t tmp_size;                   /* Temporary holder for raw data size */
     hsize_t max_points;                 /* Maximum elements */
     hsize_t max_storage;                /* Maximum storage size */
-    int ndims;                          /* Rank of dataspace */
-    int i;                              /* Local index variable */
+    unsigned u;                         /* Local index variable */
     herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_STATIC
@@ -149,11 +146,9 @@ H5D__efl_construct(H5F_t *f, H5D_t *dset)
      */
 
     /* Check for invalid dataset dimensions */
-    if((ndims = H5S_get_simple_extent_dims(dset->shared->space, dim, max_dim)) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to initialize contiguous storage")
-    for(i = 1; i < ndims; i++)
-        if(max_dim[i] > dim[i])
-            HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "only the first dimension can be extendible")
+    for(u = 1; u < dset->shared->ndims; u++)
+        if(dset->shared->max_dims[u] > dset->shared->curr_dims[u])
+            HGOTO_ERROR(H5E_DATASET, H5E_UNSUPPORTED, FAIL, "only the first dimension can be extendible")
 
     /* Retrieve the size of the dataset's datatype */
     if(0 == (dt_size = H5T_get_size(dset->shared->type)))
diff --git a/src/H5Dint.c b/src/H5Dint.c
index 8e1fcec..c626475 100644
--- a/src/H5Dint.c
+++ b/src/H5Dint.c
@@ -62,6 +62,7 @@ static H5D_shared_t *H5D__new(hid_t dcpl_id, hbool_t creating,
     hbool_t vl_type);
 static herr_t H5D__init_type(H5F_t *file, const H5D_t *dset, hid_t type_id,
     const H5T_t *type);
+static herr_t H5D__cache_dataspace_info(const H5D_t *dset);
 static herr_t H5D__init_space(H5F_t *file, const H5D_t *dset, const H5S_t *space);
 static herr_t H5D__update_oh_info(H5F_t *file, hid_t dxpl_id, H5D_t *dset,
     hid_t dapl_id);
@@ -665,6 +666,41 @@ done:
 
 
 /*-------------------------------------------------------------------------
+ * Function:	H5D__cache_dataspace_info
+ *
+ * Purpose:	Cache dataspace info for a dataset
+ *
+ * Return:	Success:    SUCCEED
+ *		Failure:    FAIL
+ *
+ * Programmer:	Quincey Koziol
+ *		Wednesday, November 19, 2014
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5D__cache_dataspace_info(const H5D_t *dset)
+{
+    int sndims;                         /* Signed number of dimensions of dataspace rank */
+    unsigned u;                         /* Local index value */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Sanity checking */
+    HDassert(dset);
+
+    /* Cache info for dataset's dataspace */
+    if((sndims = H5S_get_simple_extent_dims(dset->shared->space, dset->shared->curr_dims, dset->shared->max_dims)) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't cache dataspace dimensions")
+    dset->shared->ndims = (unsigned)sndims;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5D__cache_dataspace_info() */
+
+
+/*-------------------------------------------------------------------------
  * Function:	H5D__init_space
  *
  * Purpose:	Copy a dataspace for a dataset's use, performing all the
@@ -698,6 +734,10 @@ H5D__init_space(H5F_t *file, const H5D_t *dset, const H5S_t *space)
     if(NULL == (dset->shared->space = H5S_copy(space, FALSE, TRUE)))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTCOPY, FAIL, "can't copy dataspace")
 
+    /* Cache the dataset's dataspace info */
+    if(H5D__cache_dataspace_info(dset) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTCOPY, FAIL, "can't cache dataspace info")
+
     /* Set the latest format, if requested */
     if(use_latest_format)
         if(H5S_set_latest_version(dset->shared->space) < 0)
@@ -1251,6 +1291,10 @@ H5D__open_oid(H5D_t *dataset, hid_t dapl_id, hid_t dxpl_id)
     if(NULL == (dataset->shared->space = H5S_read(&(dataset->oloc), dxpl_id)))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to load dataspace info from dataset header")
 
+    /* Cache the dataset's dataspace info */
+    if(H5D__cache_dataspace_info(dataset) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTCOPY, FAIL, "can't cache dataspace info")
+
     /* Get a datatype ID for the dataset's datatype */
     if((dataset->shared->type_id = H5I_register(H5I_DATATYPE, dataset->shared->type, FALSE)) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTREGISTER, FAIL, "unable to register type")
@@ -2161,9 +2205,7 @@ done:
 herr_t
 H5D__set_extent(H5D_t *dset, const hsize_t *size, hid_t dxpl_id)
 {
-    H5S_t   *space;                     /* Dataset's dataspace */
-    int     rank;                       /* Dataspace # of dimensions */
-    hsize_t curr_dims[H5O_LAYOUT_NDIMS];/* Current dimension sizes */
+    hsize_t curr_dims[H5S_MAX_RANK];    /* Current dimension sizes */
     htri_t  changed;                    /* Whether the dataspace changed size */
     herr_t  ret_value = SUCCEED;        /* Return value */
 
@@ -2187,29 +2229,30 @@ H5D__set_extent(H5D_t *dset, const hsize_t *size, hid_t dxpl_id)
     if(H5D__check_filters(dset) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't apply filters")
 
-    /* Get the data space */
-    space = dset->shared->space;
-
-    /* Check if we are shrinking or expanding any of the dimensions */
-    if((rank = H5S_get_simple_extent_dims(space, curr_dims, NULL)) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get dataset dimensions")
+    /* Keep the current dataspace dimensions for later */
+    HDcompile_assert(sizeof(curr_dims) == sizeof(dset->shared->curr_dims));
+    HDmemcpy(curr_dims, dset->shared->curr_dims, H5S_MAX_RANK * sizeof(curr_dims[0]));
 
-    /* Modify the size of the data space */
-    if((changed = H5S_set_extent(space, size)) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to modify size of data space")
+    /* Modify the size of the dataspace */
+    if((changed = H5S_set_extent(dset->shared->space, size)) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to modify size of dataspace")
 
     /* Don't bother updating things, unless they've changed */
     if(changed) {
-        hbool_t shrink = FALSE;             /* Flag to indicate a dimension has shrank */
-        hbool_t expand = FALSE;             /* Flag to indicate a dimension has grown */
-        unsigned u;                         /* Local index variable */
+        hbool_t shrink = FALSE;         /* Flag to indicate a dimension has shrank */
+        hbool_t expand = FALSE;         /* Flag to indicate a dimension has grown */
+        unsigned u;                     /* Local index variable */
 
         /* Determine if we are shrinking and/or expanding any dimensions */
-        for(u = 0; u < (unsigned)rank; u++) {
+        for(u = 0; u < dset->shared->ndims; u++) {
+            /* Check for various status changes */
             if(size[u] < curr_dims[u])
                 shrink = TRUE;
             if(size[u] > curr_dims[u])
                 expand = TRUE;
+
+            /* Update the cached copy of the dataset's dimensions */
+            dset->shared->curr_dims[u] = size[u];
         } /* end for */
 
         /*-------------------------------------------------------------------------
diff --git a/src/H5Dio.c b/src/H5Dio.c
index 1c77d93..44080dc 100644
--- a/src/H5Dio.c
+++ b/src/H5Dio.c
@@ -302,8 +302,6 @@ H5D__pre_write(H5D_t *dset, hbool_t direct_write, hid_t mem_type_id,
         uint32_t direct_filters;
         hsize_t *direct_offset;
         uint32_t direct_datasize;
-	int      ndims = 0;
-	hsize_t  dims[H5O_LAYOUT_NDIMS];
 	hsize_t  internal_offset[H5O_LAYOUT_NDIMS];
 	unsigned u;                 /* Local index variable */
 
@@ -324,12 +322,9 @@ H5D__pre_write(H5D_t *dset, hbool_t direct_write, hid_t mem_type_id,
 
 	/* The library's chunking code requires the offset terminates with a zero. So transfer the 
          * offset array to an internal offset array */ 
-	if((ndims = H5S_get_simple_extent_dims(dset->shared->space, dims, NULL)) < 0)
-	    HGOTO_ERROR(H5E_DATASPACE, H5E_CANTGET, FAIL, "can't retrieve dataspace extent dims")
-
-	for(u = 0; u < (unsigned)ndims; u++) {
+	for(u = 0; u < dset->shared->ndims; u++) {
 	    /* Make sure the offset doesn't exceed the dataset's dimensions */
-            if(direct_offset[u] > dims[u])
+            if(direct_offset[u] > dset->shared->curr_dims[u])
 		HGOTO_ERROR(H5E_DATASPACE, H5E_BADTYPE, FAIL, "offset exceeds dimensions of dataset")
 
             /* Make sure the offset fall right on a chunk's boundary */
@@ -340,7 +335,7 @@ H5D__pre_write(H5D_t *dset, hbool_t direct_write, hid_t mem_type_id,
 	} /* end for */
 	   
 	/* Terminate the offset with a zero */ 
-	internal_offset[ndims] = 0;
+	internal_offset[dset->shared->ndims] = 0;
 
 	/* write raw data */
 	if(H5D__chunk_direct_write(dset, dxpl_id, direct_filters, internal_offset, direct_datasize, buf) < 0)
diff --git a/src/H5Dmpio.c b/src/H5Dmpio.c
index bd1531d..db487cd 100644
--- a/src/H5Dmpio.c
+++ b/src/H5Dmpio.c
@@ -860,8 +860,7 @@ H5D__link_chunk_collective_io(H5D_io_info_t *io_info, const H5D_type_info_t *typ
             mspace = chunk_info->mspace;
 
             /* Look up address of chunk */
-            if(H5D__chunk_lookup(io_info->dset, io_info->dxpl_id, chunk_info->coords,
-                    chunk_info->index, &udata) < 0)
+            if(H5D__chunk_lookup(io_info->dset, io_info->dxpl_id, chunk_info->coords, chunk_info->index, &udata) < 0)
                 HGOTO_ERROR(H5E_STORAGE, H5E_CANTGET, FAIL, "couldn't get chunk address")
             ctg_store.contig.dset_addr = udata.chunk_block.offset;
         } /* end else */
diff --git a/src/H5Dpkg.h b/src/H5Dpkg.h
index a3a3985..769fec1 100644
--- a/src/H5Dpkg.h
+++ b/src/H5Dpkg.h
@@ -83,7 +83,7 @@ typedef struct H5D_type_info_t {
 
     /* Computed/derived values */
     size_t src_type_size;		/* Size of source type	*/
-    size_t dst_type_size;	        /* Size of destination type*/
+    size_t dst_type_size;	        /* Size of destination type */
     size_t max_type_size;	        /* Size of largest source/destination type */
     hbool_t is_conv_noop;               /* Whether the type conversion is a NOOP */
     hbool_t is_xform_noop;              /* Whether the data transform is a NOOP */
@@ -325,9 +325,9 @@ typedef struct H5D_chunk_info_t {
     uint32_t chunk_points;      /* Number of elements selected in chunk */
     hsize_t coords[H5O_LAYOUT_NDIMS];   /* Coordinates of chunk in file dataset's dataspace */
     H5S_t *fspace;              /* Dataspace describing chunk & selection in it */
-    unsigned fspace_shared;     /* Indicate that the file space for a chunk is shared and shouldn't be freed */
+    hbool_t fspace_shared;      /* Indicate that the file space for a chunk is shared and shouldn't be freed */
     H5S_t *mspace;              /* Dataspace describing selection in memory corresponding to this chunk */
-    unsigned mspace_shared;     /* Indicate that the memory space for a chunk is shared and shouldn't be freed */
+    hbool_t mspace_shared;      /* Indicate that the memory space for a chunk is shared and shouldn't be freed */
 } H5D_chunk_info_t;
 
 /* Main structure holding the mapping between file chunks and memory */
@@ -337,7 +337,6 @@ typedef struct H5D_chunk_map_t {
 
     const H5S_t *file_space;    /* Pointer to the file dataspace */
     unsigned f_ndims;           /* Number of dimensions for file dataspace */
-    hsize_t f_dims[H5O_LAYOUT_NDIMS];   /* File dataspace dimensions */
 
     const H5S_t *mem_space;     /* Pointer to the memory dataspace */
     H5S_t *mchunk_tmpl;         /* Dataspace template for new memory chunks */
@@ -419,6 +418,11 @@ typedef struct H5D_shared_t {
     H5O_layout_t        layout;         /* Data layout                  */
     hbool_t             checked_filters;/* TRUE if dataset passes can_apply check */
 
+    /* Cached dataspace info */
+    unsigned            ndims;          /* The dataset's dataspace rank */
+    hsize_t             curr_dims[H5S_MAX_RANK];    /* The curr. size of dataset dimensions */
+    hsize_t             max_dims[H5S_MAX_RANK];     /* The max. size of dataset dimensions */ 
+
     /* Buffered/cached information for types of raw data storage*/
     struct {
         H5D_rdcdc_t     contig;         /* Information about contiguous data */
diff --git a/src/H5Oprivate.h b/src/H5Oprivate.h
index e3a2d33..3707367 100644
--- a/src/H5Oprivate.h
+++ b/src/H5Oprivate.h
@@ -424,8 +424,8 @@ typedef struct H5O_layout_chunk_t {
     uint32_t	dim[H5O_LAYOUT_NDIMS];	/* Size of chunk in elements         */
     uint32_t    size;                   /* Size of chunk in bytes            */
     hsize_t     nchunks;                /* Number of chunks in dataset	     */
-    hsize_t     chunks[H5O_LAYOUT_NDIMS]; /* # of chunks in dataset dimensions */
-    hsize_t    	down_chunks[H5O_LAYOUT_NDIMS];	/* "down" size of number of chunks in each dimension */
+    hsize_t     chunks[H5O_LAYOUT_NDIMS];          /* # of chunks in each dataset dimension  */
+    hsize_t    	down_chunks[H5O_LAYOUT_NDIMS];     /* "down" size of number of chunks in each dimension */
 } H5O_layout_chunk_t;
 
 typedef struct H5O_layout_t {
diff --git a/src/H5S.c b/src/H5S.c
index 4a1783e..dd2bb0a 100644
--- a/src/H5S.c
+++ b/src/H5S.c
@@ -2144,14 +2144,13 @@ H5S_extend(H5S_t *space, const hsize_t *size)
     HDassert(size);
 
     /* Check through all the dimensions to see if modifying the dataspace is allowed */
-    for(u = 0; u < space->extent.rank; u++) {
-        if(space->extent.size[u]<size[u]) {
-            if(space->extent.max && H5S_UNLIMITED!=space->extent.max[u] &&
-                    space->extent.max[u]<size[u])
+    for(u = 0; u < space->extent.rank; u++)
+        if(space->extent.size[u] < size[u]) {
+            if(space->extent.max && H5S_UNLIMITED != space->extent.max[u] &&
+                    space->extent.max[u] < size[u])
                 HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "dimension cannot be increased")
             ret_value++;
         } /* end if */
-    } /* end for */
 
     /* Update */
     if(ret_value) {
diff --git a/src/H5T.c b/src/H5T.c
index 9320d28..aaf8bc1 100644
--- a/src/H5T.c
+++ b/src/H5T.c
@@ -1,3 +1,4 @@
+
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
  * Copyright by The HDF Group.                                               *
  * Copyright by the Board of Trustees of the University of Illinois.         *
@@ -67,10 +68,6 @@
  *
  */
 
-/* Define the code template for types which need no extra initialization for the "GUTS" in the H5T_INIT_TYPE macro */
-#define H5T_INIT_TYPE_NONE_CORE {					      \
-}
-
 /* Define the code template for bitfields for the "GUTS" in the H5T_INIT_TYPE macro */
 #define H5T_INIT_TYPE_BITFIELD_CORE {					      \
     dt->shared->type = H5T_BITFIELD;					      \
@@ -1986,7 +1983,7 @@ H5T_detect_class(const H5T_t *dt, H5T_class_t cls, hbool_t from_api)
         case H5T_VLEN:
         case H5T_ENUM:
             HGOTO_DONE(H5T_detect_class(dt->shared->parent, cls, from_api));
-
+            break;
         case H5T_NO_CLASS:
         case H5T_INTEGER:
         case H5T_FLOAT:
@@ -3240,12 +3237,12 @@ H5T_copy(H5T_t *old_dt, H5T_copy_t method)
                     HDassert(tmp != NULL);
 
                     /* Apply the accumulated size change to the offset of the field */
-                    new_dt->shared->u.compnd.memb[i].offset += accum_change;
+                    new_dt->shared->u.compnd.memb[i].offset += (size_t) accum_change;
 
                     if(old_dt->shared->u.compnd.sorted != H5T_SORT_VALUE) {
                         for(old_match = -1, j = 0; j < old_dt->shared->u.compnd.nmembs; j++) {
                             if(!HDstrcmp(new_dt->shared->u.compnd.memb[i].name, old_dt->shared->u.compnd.memb[j].name)) {
-                                old_match = j;
+                                old_match = (int) j;
                                 break;
                             } /* end if */
                         } /* end for */
@@ -3255,19 +3252,20 @@ H5T_copy(H5T_t *old_dt, H5T_copy_t method)
                             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTCOPY, NULL, "fields in datatype corrupted");
                     } /* end if */
                     else
-                        old_match = i;
+                        old_match = (int) i;
 
                     /* If the field changed size, add that change to the accumulated size change */
                     if(new_dt->shared->u.compnd.memb[i].type->shared->size != old_dt->shared->u.compnd.memb[old_match].type->shared->size) {
                         /* Adjust the size of the member */
                         new_dt->shared->u.compnd.memb[i].size = (old_dt->shared->u.compnd.memb[old_match].size*tmp->shared->size)/old_dt->shared->u.compnd.memb[old_match].type->shared->size;
 
-                        accum_change += (new_dt->shared->u.compnd.memb[i].type->shared->size - old_dt->shared->u.compnd.memb[old_match].type->shared->size);
+                        accum_change += (int) (new_dt->shared->u.compnd.memb[i].type->shared->size - old_dt->shared->u.compnd.memb[old_match].type->shared->size);
+                        HDassert(accum_change >= 0);
                     } /* end if */
                 } /* end for */
 
                 /* Apply the accumulated size change to the size of the compound struct */
-                new_dt->shared->size += accum_change;
+                new_dt->shared->size += (size_t) accum_change;
 
                 }
                 break;
@@ -3313,6 +3311,13 @@ H5T_copy(H5T_t *old_dt, H5T_copy_t method)
                 new_dt->shared->size=new_dt->shared->u.array.nelem*new_dt->shared->parent->shared->size;
                 break;
 
+            case H5T_NO_CLASS:
+            case H5T_INTEGER:
+            case H5T_FLOAT:
+            case H5T_TIME:
+            case H5T_STRING:
+            case H5T_BITFIELD:
+            case H5T_NCLASSES:
             default:
                 break;
         } /* end switch */
@@ -3530,6 +3535,16 @@ H5T__free(H5T_t *dt)
             H5MM_xfree(dt->shared->u.opaque.tag);
             break;
 
+        case H5T_NO_CLASS:
+        case H5T_INTEGER:
+        case H5T_FLOAT:
+        case H5T_TIME:
+        case H5T_STRING:
+        case H5T_BITFIELD:
+        case H5T_REFERENCE:
+        case H5T_VLEN:
+        case H5T_ARRAY:
+        case H5T_NCLASSES:
         default:
             break;
     } /* end switch */
@@ -3796,11 +3811,14 @@ H5T_set_size(H5T_t *dt, size_t size)
             case H5T_ARRAY:
             case H5T_REFERENCE:
                 HDassert("can't happen" && 0);
+                break;
             case H5T_NO_CLASS:
             case H5T_NCLASSES:
                 HDassert("invalid type" && 0);
+                break;
             default:
                 HDassert("not implemented yet" && 0);
+                break;
         }
 
         /* Commit (if we didn't convert this type to a VL string) */
@@ -3875,7 +3893,6 @@ H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset)
     unsigned	*idx1 = NULL, *idx2 = NULL;
     size_t	base_size;
     hbool_t	swapped;
-    int	i, j;
     unsigned u;
     int	tmp;
     int	ret_value = 0;
@@ -3930,24 +3947,32 @@ H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset)
             for(u = 0; u < dt1->shared->u.compnd.nmembs; u++)
                 idx1[u] = idx2[u] = u;
             if(dt1->shared->u.enumer.nmembs > 1) {
-                for(i = dt1->shared->u.compnd.nmembs - 1, swapped = TRUE; swapped && i >= 0; --i)
+                int i;
+
+                for(i = (int) dt1->shared->u.compnd.nmembs - 1, swapped = TRUE; swapped && i >= 0; --i) {
+                    int j;
+
                     for(j = 0, swapped=FALSE; j < i; j++)
                         if(HDstrcmp(dt1->shared->u.compnd.memb[idx1[j]].name,
                                  dt1->shared->u.compnd.memb[idx1[j + 1]].name) > 0) {
-                            tmp = idx1[j];
+                            unsigned tmp_idx = idx1[j];
                             idx1[j] = idx1[j + 1];
-                            idx1[j + 1] = tmp;
+                            idx1[j + 1] = tmp_idx;
                             swapped = TRUE;
                         }
-                for(i = dt2->shared->u.compnd.nmembs - 1, swapped = TRUE; swapped && i >= 0; --i)
+                }
+                for(i = (int) dt2->shared->u.compnd.nmembs - 1, swapped = TRUE; swapped && i >= 0; --i) {
+                    int j;
+
                     for(j = 0, swapped = FALSE; j<i; j++)
                         if(HDstrcmp(dt2->shared->u.compnd.memb[idx2[j]].name,
                                  dt2->shared->u.compnd.memb[idx2[j + 1]].name) > 0) {
-                            tmp = idx2[j];
+                            unsigned tmp_idx = idx2[j];
                             idx2[j] = idx2[j + 1];
-                            idx2[j + 1] = tmp;
+                            idx2[j + 1] = tmp_idx;
                             swapped = TRUE;
                         }
+                }
             } /* end if */
 
 #ifdef H5T_DEBUG
@@ -4007,28 +4032,39 @@ H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, 0, "memory allocation failed");
             for (u=0; u<dt1->shared->u.enumer.nmembs; u++)
                 idx1[u] = u;
-            if(dt1->shared->u.enumer.nmembs > 1)
-                for (i=dt1->shared->u.enumer.nmembs-1, swapped=TRUE; swapped && i>=0; --i)
-                    for (j=0, swapped=FALSE; j<i; j++)
+            if(dt1->shared->u.enumer.nmembs > 1) {
+                int i;
+                for (i = (int) dt1->shared->u.enumer.nmembs - 1, swapped = TRUE; swapped && i >= 0; --i) {
+                    int j;
+
+                    for (j = 0, swapped = FALSE; j < i; j++)
                         if (HDstrcmp(dt1->shared->u.enumer.name[idx1[j]],
                                  dt1->shared->u.enumer.name[idx1[j+1]]) > 0) {
-                            tmp = idx1[j];
+                            unsigned tmp_idx = idx1[j];
                             idx1[j] = idx1[j+1];
-                            idx1[j+1] = tmp;
+                            idx1[j+1] = tmp_idx;
                             swapped = TRUE;
                         }
+                }
+            }
             for (u=0; u<dt2->shared->u.enumer.nmembs; u++)
                 idx2[u] = u;
-            if(dt2->shared->u.enumer.nmembs > 1)
-                for (i=dt2->shared->u.enumer.nmembs-1, swapped=TRUE; swapped && i>=0; --i)
-                    for (j=0, swapped=FALSE; j<i; j++)
+            if(dt2->shared->u.enumer.nmembs > 1) {
+                int i;
+
+                for (i = (int) dt2->shared->u.enumer.nmembs - 1, swapped = TRUE; swapped && i >= 0; --i) {
+                    int j;
+
+                    for (j = 0, swapped = FALSE; j < i; j++)
                         if (HDstrcmp(dt2->shared->u.enumer.name[idx2[j]],
                                  dt2->shared->u.enumer.name[idx2[j+1]]) > 0) {
-                            tmp = idx2[j];
+                            unsigned tmp_idx = idx2[j];
                             idx2[j] = idx2[j+1];
-                            idx2[j+1] = tmp;
+                            idx2[j+1] = tmp_idx;
                             swapped = TRUE;
                         }
+                }
+            }
 
 #ifdef H5T_DEBUG
             /* I don't quite trust the code above yet :-)  --RPM */
@@ -4148,6 +4184,14 @@ H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset)
                 HGOTO_DONE(1);
             break;
 
+        case H5T_NO_CLASS:
+        case H5T_INTEGER:
+        case H5T_FLOAT:
+        case H5T_TIME:
+        case H5T_STRING:
+        case H5T_BITFIELD:
+        case H5T_REFERENCE:
+        case H5T_NCLASSES:
         default:
             /*
              * Atomic datatypes...
@@ -4255,13 +4299,23 @@ H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset)
                         case H5R_BADTYPE:
                         case H5R_MAXTYPE:
                             HDassert("invalid type" && 0);
+                            break;
                         default:
                             HDassert("not implemented yet" && 0);
+                            break;
                     }
                     break;
 
+                case H5T_NO_CLASS:
+                case H5T_OPAQUE:
+                case H5T_COMPOUND:
+                case H5T_ENUM:
+                case H5T_VLEN:
+                case H5T_ARRAY:
+                case H5T_NCLASSES:
                 default:
                     HDassert("not implemented yet" && 0);
+                    break;
             }
         break;
     } /* end switch */
@@ -4535,7 +4589,7 @@ H5T_path_find(const H5T_t *src, const H5T_t *dst, const char *name,
         } /* end if */
         if(cmp > 0)
             md++;
-        HDmemmove(H5T_g.path + md + 1, H5T_g.path + md, (H5T_g.npaths - md) * sizeof(H5T_path_t*));
+        HDmemmove(H5T_g.path + md + 1, H5T_g.path + md, (size_t) (H5T_g.npaths - md) * sizeof(H5T_path_t*));
         H5T_g.npaths++;
 	H5T_g.path[md] = path;
 	table = path;
@@ -5000,6 +5054,17 @@ H5T_is_sensible(const H5T_t *dt)
                 ret_value=FALSE;
             break;
 
+        case H5T_NO_CLASS:
+        case H5T_INTEGER:
+        case H5T_FLOAT:
+        case H5T_TIME:
+        case H5T_STRING:
+        case H5T_BITFIELD:
+        case H5T_OPAQUE:
+        case H5T_REFERENCE:
+        case H5T_VLEN:
+        case H5T_ARRAY:
+        case H5T_NCLASSES:
         default:
             /* Assume all other datatype are sensible to store on disk */
             ret_value=TRUE;
@@ -5082,7 +5147,7 @@ H5T_set_loc(H5T_t *dt, H5F_t *f, H5T_loc_t loc)
                     H5T_t *memb_type;   /* Member's datatype pointer */
 
                     /* Apply the accumulated size change to the offset of the field */
-                    dt->shared->u.compnd.memb[i].offset += accum_change;
+                    dt->shared->u.compnd.memb[i].offset += (size_t) accum_change;
 
                     /* Set the member type pointer (for convenience) */
                     memb_type=dt->shared->u.compnd.memb[i].type;
@@ -5105,13 +5170,14 @@ H5T_set_loc(H5T_t *dt, H5F_t *f, H5T_loc_t loc)
                             dt->shared->u.compnd.memb[i].size = (dt->shared->u.compnd.memb[i].size*memb_type->shared->size)/old_size;
 
                             /* Add that change to the accumulated size change */
-                            accum_change += (memb_type->shared->size - (int)old_size);
+                            accum_change += (int) (memb_type->shared->size - old_size);
+                            HDassert(accum_change >= 0);
                         } /* end if */
                     } /* end if */
                 } /* end for */
 
                 /* Apply the accumulated size change to the datatype */
-                dt->shared->size = (size_t)(dt->shared->size + accum_change);
+                dt->shared->size = dt->shared->size + (size_t) accum_change;
                 break;
 
             case H5T_VLEN: /* Recurse on the VL information if it's VL, compound or array, then free VL sequence */
@@ -5145,6 +5211,15 @@ H5T_set_loc(H5T_t *dt, H5F_t *f, H5T_loc_t loc)
                 } /* end if */
                 break;
 
+            case H5T_NO_CLASS:
+            case H5T_INTEGER:
+            case H5T_FLOAT:
+            case H5T_TIME:
+            case H5T_STRING:
+            case H5T_BITFIELD:
+            case H5T_OPAQUE:
+            case H5T_ENUM:
+            case H5T_NCLASSES:
             default:
                 break;
         } /* end switch */
@@ -5235,6 +5310,15 @@ H5T_upgrade_version_cb(H5T_t *dt, void *op_value)
                 dt->shared->version = dt->shared->parent->shared->version;
             break;
 
+        case H5T_NO_CLASS:
+        case H5T_INTEGER:
+        case H5T_FLOAT:
+        case H5T_TIME:
+        case H5T_STRING:
+        case H5T_BITFIELD:
+        case H5T_OPAQUE:
+        case H5T_REFERENCE:
+        case H5T_NCLASSES:
         default:
             break;
     } /* end switch */
diff --git a/src/H5VMprivate.h b/src/H5VMprivate.h
index 20821b2..dbe39ca 100644
--- a/src/H5VMprivate.h
+++ b/src/H5VMprivate.h
@@ -410,6 +410,29 @@ H5VM_log2_of2(uint32_t n)
 
 
 /*-------------------------------------------------------------------------
+ * Function:	H5VM_power2up
+ *
+ * Purpose:	Round up a number to the next power of 2
+ *
+ * Return:	Return the number which is a power of 2
+ *
+ * Programmer:	Vailin Choi; Nov 2014
+ *
+ *-------------------------------------------------------------------------
+ */
+static H5_inline hsize_t UNUSED
+H5VM_power2up(hsize_t n)
+{
+    hsize_t     ret_value = 1;  /* Return value */
+
+    while(ret_value < n)
+        ret_value <<= 1;
+
+    return(ret_value);
+} /* H5VM_power2up */
+
+
+/*-------------------------------------------------------------------------
  * Function:    H5VM_limit_enc_size
  *
  * Purpose:     Determine the # of bytes needed to encode values within a