[svn-r339] Changes since 19980408

----------------------

./src/H5Osdspace.c
./html/H5.format.html
	In the past we were allowed to have >2GB files on a 32-bit
	machine as long as no dataset within the file was larger than
	4GB (or whatever sizeof(size_t) is).  That's been fixed now.
	All dataset size calculations are done with `hsize_t' which is
	normally defined as `unsigned long long'.

./src/H5F.c
./src/H5Ffamily.c
./src/H5Fprivate.h
./src/H5P.c
./src/H5Ppublic.h
	The file family member size can now be set/queried.  The
	default is still 64MB, but it can be set to 1GB by saying:

	    H5Pset_family (plist, 30, H5P_DEFAULT);

	When opening an existing file family the specified
	bits-per-member is ignored and the first member of the family
	determines the bits-per-member, which can be retrieved with
	H5Pget_family().

./acconfig.h
./configure.in
./src/H5config.h
./src/H5public.h
	Added `--disable-hsizet' so that those with old GCC compilers
	(<2.8.1) can still compile the code.


./src/H5.c
./src/H5private.h
	Added HDfprintf() which works just like fprintf() except you
	can give `H' as a size modifier for the integer conversions
	and supply an `hsize_t' or `hssize_t' argument without casting
	it.  For instance:

	    hsize_t npoints = H5Sget_npoints(space);
	    HDfprintf(stdout,"Dataset has %Hd (%#018Hx) points\n",
		      npoints, npoints);

	You can now give `%a' as a format to print an address, but all
	formating flags are ignored and it causes the return value of
	HDfprintf() to not include the characters in the address (but
	who uses the return value anyway :-). Example:

	    H5G_t *grp;
	    HDfprintf(stdout, "Group object header at %a\n",
	              &(grp->ent.header));

	Added HDstrtoll() which works exactly like [HD]strtol() except
	the result is an int64.

./src/debug.c
	Large addresses can now be entered from the command-line.  Use
	either decimal, octal (leading `0') or hexadecimal (leading
	`0x') when giving the address.

./src/h5ls.c
	The printf format for dataset dimensions was changed to `%Hu'
	to support large datasets.

./test/big.c		[NEW]
	A test for big datasets on 32-bit machines.  This test is not
	run by default.  Don't try to run it on an nfs-mounted file
	system or other file system that doesn't support holes because
	it creates two 32GB datasets of all zero.

19 files changed, 888 insertions, 341 deletions

diff --git a/MANIFEST b/MANIFEST
index 58e473b..28a7e71 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -185,6 +185,7 @@
 ./src/hdf5.h
 ./test/.distdep
 ./test/Makefile.in
+./test/big.c
 ./test/cmpd_dset.c
 ./test/dsets.c
 ./test/dspace.c
diff --git a/acconfig.h b/acconfig.h
index 83d2f17..4f5b402 100644
--- a/acconfig.h
+++ b/acconfig.h
@@ -6,3 +6,6 @@
 
 /* Define if we have parallel support */
 #undef HAVE_PARALLEL
+
+/* Define if it's safe to use `long long' for hsize_t and hssize_t */
+#undef HAVE_LARGE_HSIZET
diff --git a/configure b/configure
index 2a8184d..567d80d 100755
--- a/configure
+++ b/configure
@@ -15,6 +15,13 @@ ac_default_prefix=/usr/local
 ac_help="$ac_help
 --enable-production=yes|no  Determines how to run the compiler."
 ac_help="$ac_help
+--disable-hsizet          Datasets can normally be larger than memory
+                             and/or files but some compilers are unable to
+                             handle this (including versions of GCC before
+                             2.8.0).  Disabling the feature causes dataset
+                             sizes to be restricted to the size of core memory,
+                             or 'size_t'."
+ac_help="$ac_help
 --enable-debug=all        Turn on debugging in all packages.  One may also
                           specify a comma-separated list of package names
                           without the leading H5 or the word no.  The default
@@ -555,7 +562,7 @@ else { echo "configure: error: can not run $ac_config_sub" 1>&2; exit 1; }
 fi
 
 echo $ac_n "checking host system type""... $ac_c" 1>&6
-echo "configure:559: checking host system type" >&5
+echo "configure:566: checking host system type" >&5
 
 host_alias=$host
 case "$host_alias" in
@@ -578,7 +585,7 @@ echo "$ac_t""$host" 1>&6
 
 
 echo $ac_n "checking for cached host""... $ac_c" 1>&6
-echo "configure:582: checking for cached host" >&5
+echo "configure:589: checking for cached host" >&5
 if eval "test \"`echo '$''{'hdf5_cv_host'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -597,7 +604,7 @@ fi
 
 
 echo $ac_n "checking for site config file""... $ac_c" 1>&6
-echo "configure:601: checking for site config file" >&5
+echo "configure:608: checking for site config file" >&5
 site_config="none"
 for f in $host \
          $host_vendor-$host_os \
@@ -620,7 +627,7 @@ fi
 # Extract the first word of "gcc", so it can be a program name with args.
 set dummy gcc; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:624: checking for $ac_word" >&5
+echo "configure:631: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -649,7 +656,7 @@ if test -z "$CC"; then
   # Extract the first word of "cc", so it can be a program name with args.
 set dummy cc; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:653: checking for $ac_word" >&5
+echo "configure:660: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -697,7 +704,7 @@ fi
 fi
 
 echo $ac_n "checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works""... $ac_c" 1>&6
-echo "configure:701: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works" >&5
+echo "configure:708: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works" >&5
 
 ac_ext=c
 # CFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
@@ -707,11 +714,11 @@ ac_link='${CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS
 cross_compiling=$ac_cv_prog_cc_cross
 
 cat > conftest.$ac_ext <<EOF
-#line 711 "configure"
+#line 718 "configure"
 #include "confdefs.h"
 main(){return(0);}
 EOF
-if { (eval echo configure:715: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+if { (eval echo configure:722: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
   ac_cv_prog_cc_works=yes
   # If we can't run a trivial program, we are probably using a cross compiler.
   if (./conftest; exit) 2>/dev/null; then
@@ -731,12 +738,12 @@ if test $ac_cv_prog_cc_works = no; then
   { echo "configure: error: installation or configuration problem: C compiler cannot create executables." 1>&2; exit 1; }
 fi
 echo $ac_n "checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler""... $ac_c" 1>&6
-echo "configure:735: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler" >&5
+echo "configure:742: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler" >&5
 echo "$ac_t""$ac_cv_prog_cc_cross" 1>&6
 cross_compiling=$ac_cv_prog_cc_cross
 
 echo $ac_n "checking whether we are using GNU C""... $ac_c" 1>&6
-echo "configure:740: checking whether we are using GNU C" >&5
+echo "configure:747: checking whether we are using GNU C" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_gcc'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -745,7 +752,7 @@ else
   yes;
 #endif
 EOF
-if { ac_try='${CC-cc} -E conftest.c'; { (eval echo configure:749: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
+if { ac_try='${CC-cc} -E conftest.c'; { (eval echo configure:756: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
   ac_cv_prog_gcc=yes
 else
   ac_cv_prog_gcc=no
@@ -760,7 +767,7 @@ if test $ac_cv_prog_gcc = yes; then
   ac_save_CFLAGS="$CFLAGS"
   CFLAGS=
   echo $ac_n "checking whether ${CC-cc} accepts -g""... $ac_c" 1>&6
-echo "configure:764: checking whether ${CC-cc} accepts -g" >&5
+echo "configure:771: checking whether ${CC-cc} accepts -g" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_cc_g'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -788,7 +795,7 @@ else
 fi
 
 echo $ac_n "checking whether ${MAKE-make} sets \${MAKE}""... $ac_c" 1>&6
-echo "configure:792: checking whether ${MAKE-make} sets \${MAKE}" >&5
+echo "configure:799: checking whether ${MAKE-make} sets \${MAKE}" >&5
 set dummy ${MAKE-make}; ac_make=`echo "$2" | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_prog_make_${ac_make}_set'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -825,7 +832,7 @@ fi
 # SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
 # ./install, which can be erroneously created by make from ./install.sh.
 echo $ac_n "checking for a BSD compatible install""... $ac_c" 1>&6
-echo "configure:829: checking for a BSD compatible install" >&5
+echo "configure:836: checking for a BSD compatible install" >&5
 if test -z "$INSTALL"; then
 if eval "test \"`echo '$''{'ac_cv_path_install'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -877,7 +884,7 @@ test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
 # Extract the first word of "ranlib", so it can be a program name with args.
 set dummy ranlib; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:881: checking for $ac_word" >&5
+echo "configure:888: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_RANLIB'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -910,7 +917,7 @@ do
 # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:914: checking for $ac_word" >&5
+echo "configure:921: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_AR'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -943,7 +950,7 @@ fi
 
 
 echo $ac_n "checking for GNU Make""... $ac_c" 1>&6
-echo "configure:947: checking for GNU Make" >&5
+echo "configure:954: checking for GNU Make" >&5
 if test "`${MAKE-make} --version -f /dev/null 2>/dev/null |\
   sed -n 1p|cut -c1-8`" = "GNU Make"; then
    echo "$ac_t""yes" 1>&6
@@ -957,7 +964,7 @@ if test Xyes = "X$GCC"; then
 fi
 
 echo $ac_n "checking for production mode""... $ac_c" 1>&6
-echo "configure:961: checking for production mode" >&5
+echo "configure:968: checking for production mode" >&5
 # Check whether --enable-production or --disable-production was given.
 if test "${enable_production+set}" = set; then
   enableval="$enable_production"
@@ -988,7 +995,7 @@ esac
 
 
 echo $ac_n "checking for main in -lcoug""... $ac_c" 1>&6
-echo "configure:992: checking for main in -lcoug" >&5
+echo "configure:999: checking for main in -lcoug" >&5
 ac_lib_var=`echo coug'_'main | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -996,14 +1003,14 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lcoug  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 1000 "configure"
+#line 1007 "configure"
 #include "confdefs.h"
 
 int main() {
 main()
 ; return 0; }
 EOF
-if { (eval echo configure:1007: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+if { (eval echo configure:1014: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -1032,7 +1039,7 @@ fi
 	
 
 echo $ac_n "checking how to run the C preprocessor""... $ac_c" 1>&6
-echo "configure:1036: checking how to run the C preprocessor" >&5
+echo "configure:1043: checking how to run the C preprocessor" >&5
 # On Suns, sometimes $CPP names a directory.
 if test -n "$CPP" && test -d "$CPP"; then
   CPP=
@@ -1047,13 +1054,13 @@ else
   # On the NeXT, cc -E runs the code through the compiler's parser,
   # not just through cpp.
   cat > conftest.$ac_ext <<EOF
-#line 1051 "configure"
+#line 1058 "configure"
 #include "confdefs.h"
 #include <assert.h>
 Syntax Error
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:1057: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:1064: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out`
 if test -z "$ac_err"; then
   :
@@ -1064,13 +1071,13 @@ else
   rm -rf conftest*
   CPP="${CC-cc} -E -traditional-cpp"
   cat > conftest.$ac_ext <<EOF
-#line 1068 "configure"
+#line 1075 "configure"
 #include "confdefs.h"
 #include <assert.h>
 Syntax Error
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:1074: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:1081: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out`
 if test -z "$ac_err"; then
   :
@@ -1093,12 +1100,12 @@ fi
 echo "$ac_t""$CPP" 1>&6
 
 echo $ac_n "checking for ANSI C header files""... $ac_c" 1>&6
-echo "configure:1097: checking for ANSI C header files" >&5
+echo "configure:1104: checking for ANSI C header files" >&5
 if eval "test \"`echo '$''{'ac_cv_header_stdc'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1102 "configure"
+#line 1109 "configure"
 #include "confdefs.h"
 #include <stdlib.h>
 #include <stdarg.h>
@@ -1106,7 +1113,7 @@ else
 #include <float.h>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:1110: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:1117: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -1123,7 +1130,7 @@ rm -f conftest*
 if test $ac_cv_header_stdc = yes; then
   # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
 cat > conftest.$ac_ext <<EOF
-#line 1127 "configure"
+#line 1134 "configure"
 #include "confdefs.h"
 #include <string.h>
 EOF
@@ -1141,7 +1148,7 @@ fi
 if test $ac_cv_header_stdc = yes; then
   # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
 cat > conftest.$ac_ext <<EOF
-#line 1145 "configure"
+#line 1152 "configure"
 #include "confdefs.h"
 #include <stdlib.h>
 EOF
@@ -1162,7 +1169,7 @@ if test "$cross_compiling" = yes; then
   :
 else
   cat > conftest.$ac_ext <<EOF
-#line 1166 "configure"
+#line 1173 "configure"
 #include "confdefs.h"
 #include <ctype.h>
 #define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
@@ -1173,7 +1180,7 @@ if (XOR (islower (i), ISLOWER (i)) || toupper (i) != TOUPPER (i)) exit(2);
 exit (0); }
 
 EOF
-if { (eval echo configure:1177: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:1184: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
 then
   :
 else
@@ -1200,17 +1207,17 @@ for ac_hdr in unistd.h
 do
 ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6
-echo "configure:1204: checking for $ac_hdr" >&5
+echo "configure:1211: checking for $ac_hdr" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1209 "configure"
+#line 1216 "configure"
 #include "confdefs.h"
 #include <$ac_hdr>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:1214: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:1221: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -1239,12 +1246,12 @@ done
 
 
 echo $ac_n "checking for off_t""... $ac_c" 1>&6
-echo "configure:1243: checking for off_t" >&5
+echo "configure:1250: checking for off_t" >&5
 if eval "test \"`echo '$''{'ac_cv_type_off_t'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1248 "configure"
+#line 1255 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #if STDC_HEADERS
@@ -1272,12 +1279,12 @@ EOF
 fi
 
 echo $ac_n "checking for size_t""... $ac_c" 1>&6
-echo "configure:1276: checking for size_t" >&5
+echo "configure:1283: checking for size_t" >&5
 if eval "test \"`echo '$''{'ac_cv_type_size_t'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1281 "configure"
+#line 1288 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #if STDC_HEADERS
@@ -1304,148 +1311,15 @@ EOF
 
 fi
 
-
-
-
-for ac_func in getpwuid gethostname system
-do
-echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
-echo "configure:1314: checking for $ac_func" >&5
-if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
-  echo $ac_n "(cached) $ac_c" 1>&6
-else
-  cat > conftest.$ac_ext <<EOF
-#line 1319 "configure"
-#include "confdefs.h"
-/* System header to define __stub macros and hopefully few prototypes,
-    which can conflict with char $ac_func(); below.  */
-#include <assert.h>
-/* Override any gcc2 internal prototype to avoid an error.  */
-/* We use char because int might match the return type of a gcc2
-    builtin and then its argument prototype would still apply.  */
-char $ac_func();
-
-int main() {
-
-/* The GNU C library defines this for functions which it implements
-    to always fail with ENOSYS.  Some functions are actually named
-    something starting with __ and the normal name is an alias.  */
-#if defined (__stub_$ac_func) || defined (__stub___$ac_func)
-choke me
-#else
-$ac_func();
-#endif
-
-; return 0; }
-EOF
-if { (eval echo configure:1342: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
-  rm -rf conftest*
-  eval "ac_cv_func_$ac_func=yes"
-else
-  echo "configure: failed program was:" >&5
-  cat conftest.$ac_ext >&5
-  rm -rf conftest*
-  eval "ac_cv_func_$ac_func=no"
-fi
-rm -f conftest*
-fi
-
-if eval "test \"`echo '$ac_cv_func_'$ac_func`\" = yes"; then
-  echo "$ac_t""yes" 1>&6
-    ac_tr_func=HAVE_`echo $ac_func | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
-  cat >> confdefs.h <<EOF
-#define $ac_tr_func 1
-EOF
- 
-else
-  echo "$ac_t""no" 1>&6
-fi
-done
-
-
-cat > conftest.$ac_ext <<EOF
-#line 1368 "configure"
-#include "confdefs.h"
-#include<sys/types.h>
-int main() {
-off64_t n = 0;
-; return 0; }
-EOF
-if { (eval echo configure:1375: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
-  rm -rf conftest*
-  for ac_func in lseek64 fseek64
-do
-echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
-echo "configure:1380: checking for $ac_func" >&5
-if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
-  echo $ac_n "(cached) $ac_c" 1>&6
-else
-  cat > conftest.$ac_ext <<EOF
-#line 1385 "configure"
-#include "confdefs.h"
-/* System header to define __stub macros and hopefully few prototypes,
-    which can conflict with char $ac_func(); below.  */
-#include <assert.h>
-/* Override any gcc2 internal prototype to avoid an error.  */
-/* We use char because int might match the return type of a gcc2
-    builtin and then its argument prototype would still apply.  */
-char $ac_func();
-
-int main() {
-
-/* The GNU C library defines this for functions which it implements
-    to always fail with ENOSYS.  Some functions are actually named
-    something starting with __ and the normal name is an alias.  */
-#if defined (__stub_$ac_func) || defined (__stub___$ac_func)
-choke me
-#else
-$ac_func();
-#endif
-
-; return 0; }
-EOF
-if { (eval echo configure:1408: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
-  rm -rf conftest*
-  eval "ac_cv_func_$ac_func=yes"
-else
-  echo "configure: failed program was:" >&5
-  cat conftest.$ac_ext >&5
-  rm -rf conftest*
-  eval "ac_cv_func_$ac_func=no"
-fi
-rm -f conftest*
-fi
-
-if eval "test \"`echo '$ac_cv_func_'$ac_func`\" = yes"; then
-  echo "$ac_t""yes" 1>&6
-    ac_tr_func=HAVE_`echo $ac_func | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
-  cat >> confdefs.h <<EOF
-#define $ac_tr_func 1
-EOF
- 
-else
-  echo "$ac_t""no" 1>&6
-fi
-done
-
-else
-  echo "configure: failed program was:" >&5
-  cat conftest.$ac_ext >&5
-  rm -rf conftest*
-  echo "$ac_t""skipping test for lseek64() and fseek64()" 1>&6
-fi
-rm -f conftest*
-
-
 echo $ac_n "checking whether byte ordering is bigendian""... $ac_c" 1>&6
-echo "configure:1442: checking whether byte ordering is bigendian" >&5
+echo "configure:1316: checking whether byte ordering is bigendian" >&5
 if eval "test \"`echo '$''{'ac_cv_c_bigendian'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   ac_cv_c_bigendian=unknown
 # See if sys/param.h defines the BYTE_ORDER macro.
 cat > conftest.$ac_ext <<EOF
-#line 1449 "configure"
+#line 1323 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <sys/param.h>
@@ -1456,11 +1330,11 @@ int main() {
 #endif
 ; return 0; }
 EOF
-if { (eval echo configure:1460: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:1334: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   # It does; now see whether it defined to BIG_ENDIAN or not.
 cat > conftest.$ac_ext <<EOF
-#line 1464 "configure"
+#line 1338 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <sys/param.h>
@@ -1471,7 +1345,7 @@ int main() {
 #endif
 ; return 0; }
 EOF
-if { (eval echo configure:1475: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:1349: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_c_bigendian=yes
 else
@@ -1491,7 +1365,7 @@ if test "$cross_compiling" = yes; then
     { echo "configure: error: can not run test program while cross compiling" 1>&2; exit 1; }
 else
   cat > conftest.$ac_ext <<EOF
-#line 1495 "configure"
+#line 1369 "configure"
 #include "confdefs.h"
 main () {
   /* Are we little or big endian?  From Harbison&Steele.  */
@@ -1504,7 +1378,7 @@ main () {
   exit (u.c[sizeof (long) - 1] == 1);
 }
 EOF
-if { (eval echo configure:1508: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:1382: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
 then
   ac_cv_c_bigendian=no
 else
@@ -1528,7 +1402,7 @@ EOF
 fi
 
 echo $ac_n "checking size of short""... $ac_c" 1>&6
-echo "configure:1532: checking size of short" >&5
+echo "configure:1406: checking size of short" >&5
 if eval "test \"`echo '$''{'ac_cv_sizeof_short'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1536,7 +1410,7 @@ else
   ac_cv_sizeof_short=2
 else
   cat > conftest.$ac_ext <<EOF
-#line 1540 "configure"
+#line 1414 "configure"
 #include "confdefs.h"
 #include <stdio.h>
 main()
@@ -1547,7 +1421,7 @@ main()
   exit(0);
 }
 EOF
-if { (eval echo configure:1551: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:1425: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
 then
   ac_cv_sizeof_short=`cat conftestval`
 else
@@ -1567,7 +1441,7 @@ EOF
 
 
 echo $ac_n "checking size of int""... $ac_c" 1>&6
-echo "configure:1571: checking size of int" >&5
+echo "configure:1445: checking size of int" >&5
 if eval "test \"`echo '$''{'ac_cv_sizeof_int'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1575,7 +1449,7 @@ else
   ac_cv_sizeof_int=4
 else
   cat > conftest.$ac_ext <<EOF
-#line 1579 "configure"
+#line 1453 "configure"
 #include "confdefs.h"
 #include <stdio.h>
 main()
@@ -1586,7 +1460,7 @@ main()
   exit(0);
 }
 EOF
-if { (eval echo configure:1590: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:1464: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
 then
   ac_cv_sizeof_int=`cat conftestval`
 else
@@ -1606,7 +1480,7 @@ EOF
 
 
 echo $ac_n "checking size of long""... $ac_c" 1>&6
-echo "configure:1610: checking size of long" >&5
+echo "configure:1484: checking size of long" >&5
 if eval "test \"`echo '$''{'ac_cv_sizeof_long'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1614,7 +1488,7 @@ else
   ac_cv_sizeof_long=4
 else
   cat > conftest.$ac_ext <<EOF
-#line 1618 "configure"
+#line 1492 "configure"
 #include "confdefs.h"
 #include <stdio.h>
 main()
@@ -1625,7 +1499,7 @@ main()
   exit(0);
 }
 EOF
-if { (eval echo configure:1629: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:1503: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
 then
   ac_cv_sizeof_long=`cat conftestval`
 else
@@ -1645,7 +1519,7 @@ EOF
 
 
 echo $ac_n "checking size of long long""... $ac_c" 1>&6
-echo "configure:1649: checking size of long long" >&5
+echo "configure:1523: checking size of long long" >&5
 if eval "test \"`echo '$''{'ac_cv_sizeof_long_long'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1653,7 +1527,7 @@ else
   ac_cv_sizeof_long_long=8
 else
   cat > conftest.$ac_ext <<EOF
-#line 1657 "configure"
+#line 1531 "configure"
 #include "confdefs.h"
 #include <stdio.h>
 main()
@@ -1664,7 +1538,7 @@ main()
   exit(0);
 }
 EOF
-if { (eval echo configure:1668: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:1542: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
 then
   ac_cv_sizeof_long_long=`cat conftestval`
 else
@@ -1684,7 +1558,7 @@ EOF
 
 
 echo $ac_n "checking size of float""... $ac_c" 1>&6
-echo "configure:1688: checking size of float" >&5
+echo "configure:1562: checking size of float" >&5
 if eval "test \"`echo '$''{'ac_cv_sizeof_float'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1692,7 +1566,7 @@ else
   ac_cv_sizeof_float=4
 else
   cat > conftest.$ac_ext <<EOF
-#line 1696 "configure"
+#line 1570 "configure"
 #include "confdefs.h"
 #include <stdio.h>
 main()
@@ -1703,7 +1577,7 @@ main()
   exit(0);
 }
 EOF
-if { (eval echo configure:1707: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:1581: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
 then
   ac_cv_sizeof_float=`cat conftestval`
 else
@@ -1723,7 +1597,7 @@ EOF
 
 
 echo $ac_n "checking size of double""... $ac_c" 1>&6
-echo "configure:1727: checking size of double" >&5
+echo "configure:1601: checking size of double" >&5
 if eval "test \"`echo '$''{'ac_cv_sizeof_double'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1731,7 +1605,7 @@ else
   ac_cv_sizeof_double=8
 else
   cat > conftest.$ac_ext <<EOF
-#line 1735 "configure"
+#line 1609 "configure"
 #include "confdefs.h"
 #include <stdio.h>
 main()
@@ -1742,7 +1616,7 @@ main()
   exit(0);
 }
 EOF
-if { (eval echo configure:1746: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:1620: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
 then
   ac_cv_sizeof_double=`cat conftestval`
 else
@@ -1762,7 +1636,7 @@ EOF
 
 
 echo $ac_n "checking size of size_t""... $ac_c" 1>&6
-echo "configure:1766: checking size of size_t" >&5
+echo "configure:1640: checking size of size_t" >&5
 if eval "test \"`echo '$''{'ac_cv_sizeof_size_t'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1770,7 +1644,7 @@ else
   ac_cv_sizeof_size_t=4
 else
   cat > conftest.$ac_ext <<EOF
-#line 1774 "configure"
+#line 1648 "configure"
 #include "confdefs.h"
 #include <stdio.h>
 main()
@@ -1781,7 +1655,7 @@ main()
   exit(0);
 }
 EOF
-if { (eval echo configure:1785: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:1659: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
 then
   ac_cv_sizeof_size_t=`cat conftestval`
 else
@@ -1804,7 +1678,7 @@ cat >>confdefs.h <<\EOF
 #include <sys/types.h> /*for off_t definition*/
 EOF
 echo $ac_n "checking size of off_t""... $ac_c" 1>&6
-echo "configure:1808: checking size of off_t" >&5
+echo "configure:1682: checking size of off_t" >&5
 if eval "test \"`echo '$''{'ac_cv_sizeof_off_t'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1812,7 +1686,7 @@ else
   ac_cv_sizeof_off_t=4
 else
   cat > conftest.$ac_ext <<EOF
-#line 1816 "configure"
+#line 1690 "configure"
 #include "confdefs.h"
 #include <stdio.h>
 main()
@@ -1823,7 +1697,7 @@ main()
   exit(0);
 }
 EOF
-if { (eval echo configure:1827: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:1701: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
 then
   ac_cv_sizeof_off_t=`cat conftestval`
 else
@@ -1843,16 +1717,166 @@ EOF
 
 
 
+# Check whether --enable-hsizet or --disable-hsizet was given.
+if test "${enable_hsizet+set}" = set; then
+  enableval="$enable_hsizet"
+  HSIZET=$enableval
+fi
+
+echo $ac_n "checking for sizeof hsize_t and hssize_t""... $ac_c" 1>&6
+echo "configure:1728: checking for sizeof hsize_t and hssize_t" >&5
+case $HSIZET in
+    no|small)
+	echo "$ac_t""small" 1>&6
+	;;
+    *)
+        echo "$ac_t""large" 1>&6
+        cat >> confdefs.h <<\EOF
+#define HAVE_LARGE_HSIZET 1
+EOF
+
+	;;
+esac
+
+
+for ac_func in getpwuid gethostname system
+do
+echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
+echo "configure:1746: checking for $ac_func" >&5
+if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  cat > conftest.$ac_ext <<EOF
+#line 1751 "configure"
+#include "confdefs.h"
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char $ac_func(); below.  */
+#include <assert.h>
+/* Override any gcc2 internal prototype to avoid an error.  */
+/* We use char because int might match the return type of a gcc2
+    builtin and then its argument prototype would still apply.  */
+char $ac_func();
+
+int main() {
+
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined (__stub_$ac_func) || defined (__stub___$ac_func)
+choke me
+#else
+$ac_func();
+#endif
+
+; return 0; }
+EOF
+if { (eval echo configure:1774: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+  rm -rf conftest*
+  eval "ac_cv_func_$ac_func=yes"
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  eval "ac_cv_func_$ac_func=no"
+fi
+rm -f conftest*
+fi
+
+if eval "test \"`echo '$ac_cv_func_'$ac_func`\" = yes"; then
+  echo "$ac_t""yes" 1>&6
+    ac_tr_func=HAVE_`echo $ac_func | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
+  cat >> confdefs.h <<EOF
+#define $ac_tr_func 1
+EOF
+ 
+else
+  echo "$ac_t""no" 1>&6
+fi
+done
+
+
+cat > conftest.$ac_ext <<EOF
+#line 1800 "configure"
+#include "confdefs.h"
+#include<sys/types.h>
+int main() {
+off64_t n = 0;
+; return 0; }
+EOF
+if { (eval echo configure:1807: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  rm -rf conftest*
+  for ac_func in lseek64 fseek64
+do
+echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
+echo "configure:1812: checking for $ac_func" >&5
+if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  cat > conftest.$ac_ext <<EOF
+#line 1817 "configure"
+#include "confdefs.h"
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char $ac_func(); below.  */
+#include <assert.h>
+/* Override any gcc2 internal prototype to avoid an error.  */
+/* We use char because int might match the return type of a gcc2
+    builtin and then its argument prototype would still apply.  */
+char $ac_func();
+
+int main() {
+
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined (__stub_$ac_func) || defined (__stub___$ac_func)
+choke me
+#else
+$ac_func();
+#endif
+
+; return 0; }
+EOF
+if { (eval echo configure:1840: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+  rm -rf conftest*
+  eval "ac_cv_func_$ac_func=yes"
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  eval "ac_cv_func_$ac_func=no"
+fi
+rm -f conftest*
+fi
+
+if eval "test \"`echo '$ac_cv_func_'$ac_func`\" = yes"; then
+  echo "$ac_t""yes" 1>&6
+    ac_tr_func=HAVE_`echo $ac_func | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
+  cat >> confdefs.h <<EOF
+#define $ac_tr_func 1
+EOF
+ 
+else
+  echo "$ac_t""no" 1>&6
+fi
+done
+
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  echo "$ac_t""skipping test for lseek64() and fseek64()" 1>&6
+fi
+rm -f conftest*
 
 
 
 echo $ac_n "checking for working const""... $ac_c" 1>&6
-echo "configure:1851: checking for working const" >&5
+echo "configure:1875: checking for working const" >&5
 if eval "test \"`echo '$''{'ac_cv_c_const'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1856 "configure"
+#line 1880 "configure"
 #include "confdefs.h"
 
 int main() {
@@ -1901,7 +1925,7 @@ ccp = (char const *const *) p;
 
 ; return 0; }
 EOF
-if { (eval echo configure:1905: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:1929: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_c_const=yes
 else
@@ -1922,21 +1946,21 @@ EOF
 fi
 
 echo $ac_n "checking for inline""... $ac_c" 1>&6
-echo "configure:1926: checking for inline" >&5
+echo "configure:1950: checking for inline" >&5
 if eval "test \"`echo '$''{'ac_cv_c_inline'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   ac_cv_c_inline=no
 for ac_kw in inline __inline__ __inline; do
   cat > conftest.$ac_ext <<EOF
-#line 1933 "configure"
+#line 1957 "configure"
 #include "confdefs.h"
 
 int main() {
 } $ac_kw foo() {
 ; return 0; }
 EOF
-if { (eval echo configure:1940: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:1964: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_c_inline=$ac_kw; break
 else
@@ -1963,16 +1987,16 @@ esac
 
 
 echo $ac_n "checking for __attribute__ extension""... $ac_c" 1>&6
-echo "configure:1967: checking for __attribute__ extension" >&5
+echo "configure:1991: checking for __attribute__ extension" >&5
 cat > conftest.$ac_ext <<EOF
-#line 1969 "configure"
+#line 1993 "configure"
 #include "confdefs.h"
 
 int main() {
 int __attribute__((unused)) f(void){return 1;}
 ; return 0; }
 EOF
-if { (eval echo configure:1976: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:2000: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   cat >> confdefs.h <<\EOF
 #define HAVE_ATTRIBUTE 1
@@ -1988,16 +2012,16 @@ fi
 rm -f conftest*
 
 echo $ac_n "checking for __FUNCTION__ extension""... $ac_c" 1>&6
-echo "configure:1992: checking for __FUNCTION__ extension" >&5
+echo "configure:2016: checking for __FUNCTION__ extension" >&5
 cat > conftest.$ac_ext <<EOF
-#line 1994 "configure"
+#line 2018 "configure"
 #include "confdefs.h"
 
 int main() {
 int f(void){return __FUNCTION__;}
 ; return 0; }
 EOF
-if { (eval echo configure:2001: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:2025: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   cat >> confdefs.h <<\EOF
 #define HAVE_FUNCTION 1
@@ -2013,7 +2037,7 @@ fi
 rm -f conftest*
 
 echo $ac_n "checking for debug flags""... $ac_c" 1>&6
-echo "configure:2017: checking for debug flags" >&5;
+echo "configure:2041: checking for debug flags" >&5;
 # Check whether --enable-debug or --disable-debug was given.
 if test "${enable_debug+set}" = set; then
   enableval="$enable_debug"
@@ -2051,7 +2075,7 @@ if test "${enable_parallel+set}" = set; then
 fi
 
 echo $ac_n "checking for parallel support""... $ac_c" 1>&6
-echo "configure:2055: checking for parallel support" >&5;
+echo "configure:2079: checking for parallel support" >&5;
 
 
 
@@ -2077,7 +2101,7 @@ EOF
       CPPFLAGS="$CPPFLAGS $MPI_INC"
       CFLAGS="$CFLAGS $MPI_LIB"
       echo $ac_n "checking for main in -lmpi""... $ac_c" 1>&6
-echo "configure:2081: checking for main in -lmpi" >&5
+echo "configure:2105: checking for main in -lmpi" >&5
 ac_lib_var=`echo mpi'_'main | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -2085,14 +2109,14 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lmpi  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 2089 "configure"
+#line 2113 "configure"
 #include "confdefs.h"
 
 int main() {
 main()
 ; return 0; }
 EOF
-if { (eval echo configure:2096: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+if { (eval echo configure:2120: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -2119,7 +2143,7 @@ else
   echo "$ac_t""no" 1>&6
 fi
         echo $ac_n "checking for main in -lmpio""... $ac_c" 1>&6
-echo "configure:2123: checking for main in -lmpio" >&5
+echo "configure:2147: checking for main in -lmpio" >&5
 ac_lib_var=`echo mpio'_'main | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -2127,14 +2151,14 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lmpio  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 2131 "configure"
+#line 2155 "configure"
 #include "confdefs.h"
 
 int main() {
 main()
 ; return 0; }
 EOF
-if { (eval echo configure:2138: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+if { (eval echo configure:2162: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
diff --git a/configure.in b/configure.in
index c4a9ef7..e976474 100644
--- a/configure.in
+++ b/configure.in
@@ -136,27 +136,10 @@ AC_CHECK_HEADERS(unistd.h)
 
 
 dnl ----------------------------------------------------------------------
-dnl Data types.
+dnl Data types and their sizes.
 dnl
 AC_TYPE_OFF_T
 AC_TYPE_SIZE_T
-
-
-
-dnl ----------------------------------------------------------------------
-dnl Check for functions.
-dnl
-AC_CHECK_FUNCS(getpwuid gethostname system)
-
-AC_TRY_COMPILE([#include<sys/types.h>],
-	       [off64_t n = 0;],
-	       AC_CHECK_FUNCS(lseek64 fseek64),
-	       AC_MSG_RESULT([skipping test for lseek64() and fseek64()]))
-
-
-dnl ----------------------------------------------------------------------
-dnl Check sizes of various integral data types.
-dnl
 AC_C_BIGENDIAN
 AC_CHECK_SIZEOF(short, 2)
 AC_CHECK_SIZEOF(int, 4)
@@ -170,6 +153,35 @@ cat >>confdefs.h <<\EOF
 EOF
 AC_CHECK_SIZEOF(off_t, 4)
 
+AC_ARG_ENABLE(hsizet,
+  [--disable-hsizet          Datasets can normally be larger than memory
+                             and/or files but some compilers are unable to
+                             handle this (including versions of GCC before
+                             2.8.0).  Disabling the feature causes dataset
+                             sizes to be restricted to the size of core memory,
+                             or 'size_t'.],
+  HSIZET=$enableval)
+AC_MSG_CHECKING(for sizeof hsize_t and hssize_t)
+case $HSIZET in
+    no|small)
+	AC_MSG_RESULT(small)
+	;;
+    *)
+        AC_MSG_RESULT(large)
+        AC_DEFINE(HAVE_LARGE_HSIZET)
+	;;
+esac
+
+
+dnl ----------------------------------------------------------------------
+dnl Check for functions.
+dnl
+AC_CHECK_FUNCS(getpwuid gethostname system)
+
+AC_TRY_COMPILE([#include<sys/types.h>],
+	       [off64_t n = 0;],
+	       AC_CHECK_FUNCS(lseek64 fseek64),
+	       AC_MSG_RESULT([skipping test for lseek64() and fseek64()]))
 
 
 dnl ----------------------------------------------------------------------
diff --git a/src/H5.c b/src/H5.c
index 90ea07c..64363e4 100644
--- a/src/H5.c
+++ b/src/H5.c
@@ -35,6 +35,10 @@ static char             RcsId[] = "@(#)$Revision$";
    H5_init_interface    -- initialize the H5 interface
    + */
 
+#include <ctype.h>
+#include <errno.h>
+#include <stdarg.h>
+
 /* private headers */
 #include <H5private.h>          /*library                 */
 #include <H5ACprivate.h>        /*cache                           */
@@ -369,3 +373,368 @@ H5close (void)
     H5_term_library ();
     return SUCCEED;
 }
+
+
+/*-------------------------------------------------------------------------
+ * Function:	HDfprintf
+ *
+ * Purpose:	Prints the optional arguments under the control of the format
+ *		string FMT to the stream STREAM.  This function takes the
+ *		same format as fprintf(3c) with a few added features:
+ *
+ *		The conversion modifier `H' refers to the size of an
+ *		`hsize_t' or `hssize_t' type.  For instance, "0x%018Hx"
+ *		prints an `hsize_t' value as a hex number right justified and
+ *		zero filled in an 18-character field.
+ *
+ *		The conversion `a' refers to an `haddr_t*' type. Field widths
+ *		and other flags are ignored and the address is printed by
+ *		calling H5F_addr_print().
+ *
+ * Bugs:	Return value will be incorrect if `%a' appears in the format
+ *		string.
+ *
+ * Return:	Success:	Number of characters printed
+ *
+ *		Failure:	-1
+ *
+ * Programmer:	Robb Matzke
+ *              Thursday, April  9, 1998
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+int
+HDfprintf (FILE *stream, const char *fmt, ...)
+{
+    int		n, nout = 0;
+    int		fwidth, prec;
+    int		zerofill;
+    int		leftjust;
+    int		plussign;
+    int		ldspace;
+    int		prefix;
+    int		modifier;
+    int		conv;
+    char	*rest, template[128];
+    const char	*s;
+    va_list	ap;
+    
+    assert (stream);
+    assert (fmt);
+
+    va_start (ap, fmt);
+    while (*fmt) {
+	fwidth = prec = 0;
+	zerofill = 0;
+	leftjust = 0;
+	plussign = 0;
+	prefix = 0;
+	ldspace = 0;
+	modifier = 0;
+
+	if ('%'==fmt[0] && '%'==fmt[1]) {
+	    putc ('%', stream);
+	    fmt += 2;
+	    nout++;
+	} else if ('%'==fmt[0]) {
+	    s = fmt+1;
+
+	    /* Flags */
+	    while (strchr ("-+ #", *s)) {
+		switch (*s) {
+		case '-':
+		    leftjust = 1;
+		    break;
+		case '+':
+		    plussign = 1;
+		    break;
+		case ' ':
+		    ldspace = 1;
+		    break;
+		case '#':
+		    prefix = 1;
+		    break;
+		}
+		s++;
+	    }
+	    
+	    /* Field width */
+	    if (isdigit (*s)) {
+		zerofill = ('0'==*s);
+		fwidth = strtol (s, &rest, 10);
+		s = rest;
+	    } else if ('*'==*s) {
+		fwidth = va_arg (ap, int);
+		if (fwidth<0) {
+		    leftjust = 1;
+		    fwidth = -fwidth;
+		}
+		s++;
+	    }
+
+	    /* Precision */
+	    if ('.'==*s) {
+		s++;
+		if (isdigit (*s)) {
+		    prec = strtol (s+1, &rest, 10);
+		    s = rest;
+		} else if ('*'==*s) {
+		    prec = va_arg (ap, int);
+		    s++;
+		}
+		if (prec<1) prec = 1;
+	    }
+
+	    /* Type modifier */
+	    if (strchr ("Hhlq", *s)) {
+		switch (*s) {
+		case 'H':
+		    if (sizeof(hsize_t)==sizeof(long)) {
+			modifier = 'l';
+		    } else if (sizeof(hsize_t)==sizeof(long long)) {
+			modifier = 'q';
+		    }
+		    break;
+		default:
+		    modifier = *s;
+		    break;
+		}
+		s++;
+	    }
+
+	    /* Conversion */
+	    conv = *s++;
+
+	    /* Create the format template */
+	    sprintf (template, "%%%s%s%s%s%s",
+		     leftjust?"-":"", plussign?"+":"",
+		     ldspace?" ":"", prefix?"#":"", zerofill?"0":"");
+	    if (fwidth>0) {
+		sprintf (template+strlen (template), "%d", fwidth);
+	    }
+	    if (prec>0) {
+		sprintf (template+strlen (template), ".%d", prec);
+	    }
+	    if (modifier) {
+		sprintf (template+strlen (template), "%c", modifier);
+	    }
+	    sprintf (template+strlen (template), "%c", conv);
+	    
+
+	    /* Conversion */
+	    switch (conv) {
+	    case 'd':
+	    case 'i':
+		if ('h'==modifier) {
+		    short x = va_arg (ap, short);
+		    n = fprintf (stream, template, x);
+		} else if (!modifier) {
+		    int x = va_arg (ap, int);
+		    n = fprintf (stream, template, x);
+		} else if ('l'==modifier) {
+		    long x = va_arg (ap, long);
+		    n = fprintf (stream, template, x);
+		} else if ('q'==modifier) {
+		    long long x = va_arg (ap, long long);
+		    n = fprintf (stream, template, x);
+		}
+		break;
+
+	    case 'o':
+	    case 'u':
+	    case 'x':
+	    case 'X':
+		if ('h'==modifier) {
+		    unsigned short x = va_arg (ap, unsigned short);
+		    n = fprintf (stream, template, x);
+		} else if (!modifier) {
+		    unsigned int x = va_arg (ap, unsigned int);
+		    n = fprintf (stream, template, x);
+		} else if ('l'==modifier) {
+		    unsigned long x = va_arg (ap, unsigned long);
+		    n = fprintf (stream, template, x);
+		} else if ('q'==modifier) {
+		    unsigned long long x = va_arg (ap, unsigned long long);
+		    n = fprintf (stream, template, x);
+		}
+		break;
+
+	    case 'f':
+	    case 'e':
+	    case 'E':
+	    case 'g':
+	    case 'G':
+		if ('h'==modifier) {
+		    float x = va_arg (ap, float);
+		    n = fprintf (stream, template, x);
+		} else if (!modifier || 'l'==modifier) {
+		    double x = va_arg (ap, double);
+		    n = fprintf (stream, template, x);
+		} else if ('q'==modifier) {
+		    long double x = va_arg (ap, long double);
+		    n = fprintf (stream, template, x);
+		}
+
+	    case 'a':
+		if (1) {
+		    haddr_t *x = va_arg (ap, haddr_t*);
+		    H5F_addr_print (stream, x);
+		    n = 0;
+		}
+		break;
+
+	    case 'c':
+		if (1) {
+		    char x = va_arg (ap, char);
+		    n = fprintf (stream, template, x);
+		}
+		break;
+
+	    case 's':
+	    case 'p':
+		if (1) {
+		    char *x = va_arg (ap, char*);
+		    n = fprintf (stream, template, x);
+		}
+		break;
+
+	    case 'n':
+		if (1) {
+		    template[strlen(template)-1] = 'u';
+		    n = fprintf (stream, template, nout);
+		}
+		break;
+
+	    default:
+		fputs (template, stream);
+		n = strlen (template);
+		break;
+	    }
+	    nout += n;
+	    fmt = s;
+	} else {
+	    putc (*fmt, stream);
+	    fmt++;
+	    nout++;
+	}
+    }
+    va_end (ap);
+    return nout;
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:	HDstrtoll
+ *
+ * Purpose:	Converts the string S to an int64 value according to the
+ *		given BASE, which must be between 2 and 36 inclusive, or be
+ *		the special value zero.
+ *
+ *		The string must begin with an arbitrary amount of white space
+ *		(as determined by isspace(3c)) followed by a single optional
+ *              `+' or `-' sign.  If BASE is zero or 16 the string may then
+ *		include a `0x' or `0X' prefix, and the number will be read in
+ *		base 16; otherwise a zero BASE is taken as 10 (decimal)
+ *		unless the next character is a `0', in which case it is taken
+ *		as 8 (octal).
+ *
+ *		The remainder of the string is converted to an int64 in the
+ *		obvious manner, stopping at the first character which is not
+ *		a valid digit in the given base.  (In bases above 10, the
+ *		letter `A' in either upper or lower case represetns 10, `B'
+ *		represents 11, and so forth, with `Z' representing 35.)
+ *
+ *		If REST is not null, the address of the first invalid
+ *		character in S is stored in *REST.  If there were no digits
+ *		at all, the original value of S is stored in *REST.  Thus, if
+ *		*S is not `\0' but **REST is `\0' on return the entire string
+ *		was valid.
+ *
+ * Return:	Success:	The result.
+ *
+ *		Failure:	If the input string does not contain any
+ *				digits then zero is returned and REST points
+ *				to the original value of S.  If an overflow
+ *				or underflow occurs then the maximum or
+ *				minimum possible value is returned and the
+ *				global `errno' is set to ERANGE.  If BASE is
+ *				incorrect then zero is returned.
+ *
+ * Programmer:	Robb Matzke
+ *              Thursday, April  9, 1998
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+int64
+HDstrtoll (const char *s, const char **rest, int base)
+{
+    int64	sign=1, acc=0;
+    hbool_t	overflow = FALSE;
+    
+    errno = 0;
+    if (!s || (base && (base<2 || base>36))) {
+	if (rest) *rest = s;
+	return 0;
+    }
+    
+    /* Skip white space */
+    while (isspace (*s)) s++;
+
+    /* Optional minus or plus sign */
+    if ('+'==*s) {
+	s++;
+    } else if ('-'==*s) {
+	sign = -1;
+	s++;
+    }
+
+    /* Zero base prefix */
+    if (0==base && '0'==*s && ('x'==s[1] || 'X'==s[1])) {
+	base = 16;
+	s += 2;
+    } else if (0==base && '0'==*s) {
+	base = 8;
+	s++;
+    } else if (0==base) {
+	base = 10;
+    }
+    
+    /* Digits */
+    while ((base<=10 && *s>='0' && *s<'0'+base) ||
+	   (base>10 && ((*s>='0' && *s<='9') ||
+			(*s>='a' && *s<'a'+base-10) ||
+			(*s>='A' && *s<'A'+base-10)))) {
+	if (!overflow) {
+	    int64 digit;
+	    if (*s>='0' && *s<='9') digit = *s - '0';
+	    else if (*s>='a' && *s<='z') digit = *s-'a'+10;
+	    else digit = *s-'A'+10;
+
+	    if (acc*base+digit < acc) {
+		overflow = TRUE;
+	    } else {
+		acc = acc*base + digit;
+	    }
+	}
+	s++;
+    }
+
+    /* Overflow */
+    if (overflow) {
+	if (sign>0) {
+	    acc = ((uint64)1<<(8*sizeof(int64)-1))-1;
+	} else {
+	    acc = (uint64)1<<(8*sizeof(int64)-1);
+	}
+	errno = ERANGE;
+    }
+
+    /* Return values */
+    acc *= sign;
+    if (rest) *rest = s;
+    return acc;
+}
diff --git a/src/H5F.c b/src/H5F.c
index f7193c9..042273f 100644
--- a/src/H5F.c
+++ b/src/H5F.c
@@ -155,7 +155,7 @@ H5F_init_interface(void)
 #elif (H5F_LOW_DFLT == H5F_LOW_SPLIT)
     /* Nothing to initialize */
 #elif (H5F_LOW_DFLT == H5F_LOW_FAMILY)
-    /* Nothing to initialize */
+    H5F_access_dflt.u.fam.offset_bits = 26u; /*64MB members*/
 #else
 #   error "Unknown default file driver"
 #endif
@@ -809,11 +809,16 @@ H5F_open(const char *name, uintn flags,
 
     /*
      * Update the file creation parameters and file access parameters with
-     * default values if this is the first time this file is opened.
+     * default values if this is the first time this file is opened.  Some of
+     * the properties may need to be updated.
      */
     if (1 == f->shared->nrefs) {
 	f->shared->create_parms = *create_parms;
 	f->shared->access_parms = *access_parms;
+	if (H5F_LOW_FAMILY==f->shared->access_parms.driver) {
+	    size_t x = f->shared->lf->u.fam.offset_bits;
+	    f->shared->access_parms.u.fam.offset_bits = x;
+	}
     }
     cp = &(f->shared->create_parms);
 
diff --git a/src/H5Ffamily.c b/src/H5Ffamily.c
index 402a96c..a138fea 100644
--- a/src/H5Ffamily.c
+++ b/src/H5Ffamily.c
@@ -30,16 +30,6 @@
 static hbool_t		interface_initialize_g = FALSE;
 #define INTERFACE_INIT NULL
 
-/*
- * Number of bits in the member address.  This can be up to (but not
- * including) the number of bits in the `off_t' type, but be warned that some
- * operating systems are not able to write to the last possible address of a
- * file, so a safe maximum is two less than the number of bits in an `off_t'.
- * Smaller values result in files of a more manageable size (from a human
- * perspective) but also limit the total logical size of the hdf5 file.
- */
-#define H5F_FAM_DFLT_NBITS	26u	/*64MB */
-
 #define H5F_FAM_MASK(N)		(((uint64)1<<(N))-1)
 #define H5F_FAM_OFFSET(ADDR,N)	((off_t)((ADDR)->offset & H5F_FAM_MASK(N)))
 #define H5F_FAM_MEMBNO(ADDR,N)	((intn)((ADDR)->offset >> (N)))
@@ -102,7 +92,7 @@ H5F_fam_open(const char *name, const H5F_access_t *access_parms,
     H5F_low_t	*member = NULL;		/*a family member		*/
     char	member_name[4096];	/*name of family member		*/
     intn	membno;			/*member number (zero-origin)	*/
-    size_t	nbits = H5F_FAM_DFLT_NBITS; /*num bits in an offset     */
+    size_t	nbits; 			/*num bits in an offset     */
     haddr_t	tmp_addr;		/*temporary address		*/
     const H5F_low_class_t *memb_type;	/*type of family member		*/
 
@@ -123,10 +113,10 @@ H5F_fam_open(const char *name, const H5F_access_t *access_parms,
 
     /*
      * If we're truncating the file then delete all but the first family
-     * member.	Use the default number of bits for the offset.
+     * member.
      */
     if ((flags & H5F_ACC_RDWR) && (flags & H5F_ACC_TRUNC)) {
-	for (membno = 1; /*void*/; membno++) {
+	for (membno=1; /*void*/; membno++) {
 	    sprintf(member_name, name, membno);
 	    if (!H5F_low_access(memb_type, member_name,
 				access_parms->u.fam.memb_access,
@@ -174,12 +164,13 @@ H5F_fam_open(const char *name, const H5F_access_t *access_parms,
 	member = NULL;
     }
 
-    /*
-     * If the first and second files exists then round the first file size up
-     * to the next power of two and use that as the number of bits per family
-     * member.
-     */
+    /* Calculate member size */
     if (lf->u.fam.nmemb >= 2) {
+	/*
+	 * If the first and second files exists then round the first file size
+	 * up to the next power of two and use that as the number of bits per
+	 * family member.
+	 */
 	size_t size = H5F_low_size(lf->u.fam.memb[0], &tmp_addr);
 	for (nbits=8*sizeof(size_t)-1; nbits>0; --nbits) {
 	    size_t mask = (size_t)1 << nbits;
@@ -194,6 +185,23 @@ H5F_fam_open(const char *name, const H5F_access_t *access_parms,
 		break;
 	    }
 	}
+    } else {
+	/*
+	 * Typically, the number of bits in the member offset can be up to two
+	 * less than the number of bits in an `off_t'.  On a 32-bit machine,
+	 * for instance, files can be up to 2GB-1byte in size, but since HDF5
+	 * must have a power of two we're restricted to just 1GB.  Smaller
+	 * values result in files of a more manageable size (from a human
+	 * perspective) but also limit the total logical size of the hdf5 file
+	 * since most OS's only allow a certain number of open file
+	 * descriptors (all family members are open at once).
+	 */
+#ifdef H5F_DEBUG
+	if (access_parms->u.fam.offset_bits+2>=8*sizeof(off_t)) {
+	    fprintf (stderr, "H5F: family member size may be too large.\n");
+	}
+#endif
+	nbits = MAX (access_parms->u.fam.offset_bits, 10); /*1K min*/
     }
     lf->u.fam.offset_bits = nbits;
 
diff --git a/src/H5Fprivate.h b/src/H5Fprivate.h
index 9c9e26e..3439686 100644
--- a/src/H5Fprivate.h
+++ b/src/H5Fprivate.h
@@ -248,7 +248,8 @@ typedef struct H5F_access_t {
 
 	/* Properties for file families */
 	struct {
-	    struct H5F_access_t *memb_access; /*plist for the members*/
+	    struct H5F_access_t *memb_access; /*plist for the members	*/
+	    size_t	offset_bits;	/*number of bits in offset	*/
 	} fam;
 
 	/* Properties for the split driver */
diff --git a/src/H5Osdspace.c b/src/H5Osdspace.c
index cb079fa..12ae765 100644
--- a/src/H5Osdspace.c
+++ b/src/H5Osdspace.c
@@ -67,10 +67,14 @@ static hbool_t interface_initialize_g = FALSE;
         This function decodes the "raw" disk form of a simple dimensionality
     message into a struct in memory native format.  The struct is allocated
     within this function using malloc() and is returned to the caller.
+
+ MODIFICATIONS
+  	Robb Matzke, 1998-04-09
+ 	The current and maximum dimensions are now H5F_SIZEOF_SIZET bytes
+ 	instead of just four bytes.
 --------------------------------------------------------------------------*/
 static void *
-H5O_sdspace_decode(H5F_t __unused__ *f, const uint8 *p,
-		   H5HG_t __unused__ *hobj)
+H5O_sdspace_decode(H5F_t *f, const uint8 *p, H5HG_t __unused__ *hobj)
 {
     H5S_simple_t	*sdim = NULL;/* New simple dimensionality structure */
     intn                u;  		/* local counting variable */
@@ -89,12 +93,14 @@ H5O_sdspace_decode(H5F_t __unused__ *f, const uint8 *p,
         UINT32DECODE(p, flags);
         if (sdim->rank > 0) {
             sdim->size = H5MM_xmalloc(sizeof(sdim->size[0]) * sdim->rank);
-            for (u = 0; u < sdim->rank; u++)
-                UINT32DECODE(p, sdim->size[u]);
+            for (u = 0; u < sdim->rank; u++) {
+		H5F_decode_length (f, p, sdim->size[u]);
+	    }
             if (flags & 0x01) {
                 sdim->max = H5MM_xmalloc(sizeof(sdim->max[0]) * sdim->rank);
-                for (u = 0; u < sdim->rank; u++)
-                    UINT32DECODE(p, sdim->max[u]);
+                for (u = 0; u < sdim->rank; u++) {
+		    H5F_decode_length (f, p, sdim->max[u]);
+		}
             }
             if (flags & 0x02) {
                 sdim->perm = H5MM_xmalloc(sizeof(sdim->perm[0]) * sdim->rank);
@@ -130,9 +136,14 @@ H5O_sdspace_decode(H5F_t __unused__ *f, const uint8 *p,
  DESCRIPTION
         This function encodes the native memory form of the simple
     dimensionality message in the "raw" disk form.
+
+ MODIFICATIONS
+  	Robb Matzke, 1998-04-09
+ 	The current and maximum dimensions are now H5F_SIZEOF_SIZET bytes
+ 	instead of just four bytes.
 --------------------------------------------------------------------------*/
 static herr_t
-H5O_sdspace_encode(H5F_t __unused__ *f, uint8 *p, const void *mesg)
+H5O_sdspace_encode(H5F_t *f, uint8 *p, const void *mesg)
 {
     const H5S_simple_t  *sdim = (const H5S_simple_t *) mesg;
     intn                u;  /* Local counting variable */
@@ -153,11 +164,13 @@ H5O_sdspace_encode(H5F_t __unused__ *f, uint8 *p, const void *mesg)
     UINT32ENCODE(p, sdim->rank);
     UINT32ENCODE(p, flags);
     if (sdim->rank > 0) {
-        for (u = 0; u < sdim->rank; u++)
-            UINT32ENCODE(p, sdim->size[u]);
+        for (u = 0; u < sdim->rank; u++) {
+	    H5F_encode_length (f, p, sdim->size[u]);
+	}
         if (flags & 0x01) {
-            for (u = 0; u < sdim->rank; u++)
-                UINT32ENCODE(p, sdim->max[u]);
+            for (u = 0; u < sdim->rank; u++) {
+		H5F_encode_length (f, p, sdim->max[u]);
+	    }
         }
         if (flags & 0x02) {
             for (u = 0; u < sdim->rank; u++)
@@ -229,18 +242,32 @@ H5O_sdspace_copy(const void *mesg, void *dest)
         This function returns the size of the raw simple dimensionality message on
     success.  (Not counting the message type or size fields, only the data
     portion of the message).  It doesn't take into account alignment.
+
+ MODIFICATIONS
+  	Robb Matzke, 1998-04-09
+ 	The current and maximum dimensions are now H5F_SIZEOF_SIZET bytes
+ 	instead of just four bytes.
 --------------------------------------------------------------------------*/
 static size_t
-H5O_sdspace_size(H5F_t __unused__ *f, const void *mesg)
+H5O_sdspace_size(H5F_t *f, const void *mesg)
 {
     const H5S_simple_t     *sdim = (const H5S_simple_t *) mesg;
-    size_t                  ret_value = 8;      /* all dimensionality messages are at least 8 bytes long (rank and flags) */
+    /*
+     * all dimensionality messages are at least 8 bytes long (four bytes for
+     * rank and four bytes for flags)
+     */
+    size_t                  ret_value = 8;
 
     FUNC_ENTER(H5O_sim_dtype_size, 0);
 
-    ret_value += sdim->rank * 4;        /* add in the dimension sizes */
-    ret_value += sdim->max ? sdim->rank * 4 : 0;       /* add in the space for the maximum dimensions, if they are present */
-    ret_value += sdim->perm ? sdim->rank * 4 : 0;       /* add in the space for the dimension permutations, if they are present */
+    /* add in the dimension sizes */
+    ret_value += sdim->rank * H5F_SIZEOF_SIZE (f);
+
+    /* add in the space for the maximum dimensions, if they are present */
+    ret_value += sdim->max ? sdim->rank * H5F_SIZEOF_SIZE (f) : 0;
+
+    /* add in the space for the dimension permutations, if they are present */
+    ret_value += sdim->perm ? sdim->rank * 4 : 0;
 
     FUNC_LEAVE(ret_value);
 }
@@ -279,36 +306,35 @@ H5O_sdspace_debug(H5F_t __unused__ *f, const void *mesg,
     assert(indent >= 0);
     assert(fwidth >= 0);
 
-    fprintf(stream, "%*s%-*s %lu\n", indent, "", fwidth,
+    HDfprintf(stream, "%*s%-*s %lu\n", indent, "", fwidth,
             "Rank:",
             (unsigned long) (sdim->rank));
     
-    fprintf(stream, "%*s%-*s {", indent, "", fwidth, "Dim Size:");
+    HDfprintf(stream, "%*s%-*s {", indent, "", fwidth, "Dim Size:");
     for (u = 0; u < sdim->rank; u++) {
-	fprintf (stream, "%s%lu", u?", ":"", (unsigned long)(sdim->size[u]));
+	HDfprintf (stream, "%s%Hu", u?", ":"", sdim->size[u]);
     }
-    fprintf (stream, "}\n");
+    HDfprintf (stream, "}\n");
     
-    fprintf(stream, "%*s%-*s ", indent, "", fwidth, "Dim Max:");
+    HDfprintf(stream, "%*s%-*s ", indent, "", fwidth, "Dim Max:");
     if (sdim->max) {
-	fprintf (stream, "{");
+	HDfprintf (stream, "{");
         for (u = 0; u < sdim->rank; u++) {
 	    if (H5S_UNLIMITED==sdim->max[u]) {
-		fprintf (stream, "%sINF", u?", ":"");
+		HDfprintf (stream, "%sINF", u?", ":"");
 	    } else {
-		fprintf (stream, "%s%lu", u?", ":"",
-			 (unsigned long) (sdim->max[u]));
+		HDfprintf (stream, "%s%Hu", u?", ":"", sdim->max[u]);
 	    }
 	}
-	fprintf (stream, "}\n");
+	HDfprintf (stream, "}\n");
     } else {
-	fprintf (stream, "CONSTANT\n");
+	HDfprintf (stream, "CONSTANT\n");
     }
 
     if (sdim->perm) {
-	fprintf(stream, "%*s%-*s {", indent, "", fwidth, "Dim Perm:");
+	HDfprintf(stream, "%*s%-*s {", indent, "", fwidth, "Dim Perm:");
 	for (u = 0; u < sdim->rank; u++) {
-	    fprintf (stream, "%s%lu", u?", ":"",
+	    HDfprintf (stream, "%s%lu", u?", ":"",
 		     (unsigned long) (sdim->perm[u]));
 	}
     }
diff --git a/src/H5P.c b/src/H5P.c
index 6e67b4f..25f9f31 100644
--- a/src/H5P.c
+++ b/src/H5P.c
@@ -1576,7 +1576,10 @@ H5Pget_split (hid_t tid, size_t meta_ext_size, char *meta_ext/*out*/,
  * Function:	H5Pset_family
  *
  * Purpose:	Sets the low-level driver to stripe the hdf5 address space
- *		across a family of files.
+ *		across a family of files.  The OFFSET_BITS argument indicates
+ *		how many of the low-order bits of an address will be used for
+ *		the offset within the file, and is only meaningful when
+ *		creating new files.
  *
  * Return:	Success:	SUCCEED
  *
@@ -1590,7 +1593,7 @@ H5Pget_split (hid_t tid, size_t meta_ext_size, char *meta_ext/*out*/,
  *-------------------------------------------------------------------------
  */
 herr_t
-H5Pset_family (hid_t tid, hid_t memb_tid)
+H5Pset_family (hid_t tid, size_t offset_bits, hid_t memb_tid)
 {
     
     H5F_access_t	*tmpl = NULL;
@@ -1613,6 +1616,7 @@ H5Pset_family (hid_t tid, hid_t memb_tid)
 
     /* Set driver */
     tmpl->driver = H5F_LOW_FAMILY;
+    tmpl->u.fam.offset_bits = offset_bits;
     tmpl->u.fam.memb_access = H5P_copy (H5P_FILE_ACCESS, memb_tmpl);
 
     FUNC_LEAVE (SUCCEED);
@@ -1645,7 +1649,7 @@ H5Pset_family (hid_t tid, hid_t memb_tid)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5Pget_family (hid_t tid, hid_t *memb_tid)
+H5Pget_family (hid_t tid, size_t *offset_bits/*out*/, hid_t *memb_tid/*out*/)
 {
     H5F_access_t	*tmpl = NULL;
 
@@ -1670,6 +1674,7 @@ H5Pget_family (hid_t tid, hid_t *memb_tid)
     } else if (memb_tid) {
 	*memb_tid = FAIL;
     }
+    if (offset_bits) *offset_bits = tmpl->u.fam.offset_bits;
 	
     FUNC_LEAVE (SUCCEED);
 }
diff --git a/src/H5Ppublic.h b/src/H5Ppublic.h
index db01166..28d2b80 100644
--- a/src/H5Ppublic.h
+++ b/src/H5Ppublic.h
@@ -80,8 +80,9 @@ herr_t H5Pget_split (hid_t tid, size_t meta_ext_size, char *meta_ext/*out*/,
 		     hid_t *meta_properties/*out*/, size_t raw_ext_size,
 		     char *raw_ext/*out*/, hid_t *raw_properties/*out*/);
 
-herr_t H5Pset_family (hid_t tid, hid_t memb_tid);
-herr_t H5Pget_family (hid_t tid, hid_t *memb_tid/*out*/);
+herr_t H5Pset_family (hid_t tid, size_t offset_bits, hid_t memb_tid);
+herr_t H5Pget_family (hid_t tid, size_t *offset_bits/*out*/,
+		      hid_t *memb_tid/*out*/);
 herr_t H5Pset_buffer (hid_t plist_id, size_t size, void *tconv, void *bkg);
 size_t H5Pget_buffer (hid_t plist_id, void **tconv/*out*/, void **bkg/*out*/);
 herr_t H5Pset_preserve (hid_t plist_id, hbool_t status);
diff --git a/src/H5config.h.in b/src/H5config.h.in
index e61769c..a715025 100644
--- a/src/H5config.h.in
+++ b/src/H5config.h.in
@@ -28,6 +28,9 @@
 /* Define if we have parallel support */
 #undef HAVE_PARALLEL
 
+/* Define if it's safe to use `long long' for hsize_t and hssize_t */
+#undef HAVE_LARGE_HSIZET
+
 /* The number of bytes in a double.  */
 #undef SIZEOF_DOUBLE
 
diff --git a/src/H5private.h b/src/H5private.h
index 5a5557d..33493da 100644
--- a/src/H5private.h
+++ b/src/H5private.h
@@ -272,7 +272,7 @@ typedef struct {
 #define HDfopen(S,M)            fopen(S,M)
 #define HDfork()                fork()
 #define HDfpathconf(F,N)        fpathconf(F,N)
-/* fprintf() variable arguments */
+int HDfprintf (FILE *stream, const char *fmt, ...);
 #define HDfputc(C,F)            fputc(C,F)
 #define HDfputs(S,F)            fputs(S,F)
 #define HDfread(M,Z,N,F)        fread(M,Z,N,F)
@@ -410,6 +410,7 @@ typedef struct {
 #define HDstrtod(S,R)           strtod(S,R)
 #define HDstrtok(X,Y)           strtok(X,Y)
 #define HDstrtol(S,R,N)         strtol(S,R,N)
+int64 HDstrtoll (const char *s, const char **rest, int base);
 #define HDstrtoul(S,R,N)        strtoul(S,R,N)
 #define HDstrxfrm(X,Y,Z)        strxfrm(X,Y,Z)
 #define HDsysconf(N)            sysconf(N)
diff --git a/src/H5public.h b/src/H5public.h
index 642af05..fbf96eb 100644
--- a/src/H5public.h
+++ b/src/H5public.h
@@ -46,12 +46,12 @@ typedef int hbool_t;
  * most systems, these are the same as size_t and ssize_t, but on systems
  * with small address spaces these are defined to be larger.
  */
-#if 1
-typedef size_t hsize_t;
-typedef ssize_t hssize_t;
-#else
+#ifdef HAVE_LARGE_HSIZET
 typedef unsigned long long hsize_t;
 typedef signed long long hssize_t;
+#else
+typedef size_t hsize_t;
+typedef ssize_t hssize_t;
 #endif
 
 #ifdef __cplusplus
diff --git a/src/debug.c b/src/debug.c
index 17454a1..f5370b4 100644
--- a/src/debug.c
+++ b/src/debug.c
@@ -60,7 +60,7 @@ main(int argc, char *argv[])
      */
     if (strchr (argv[1], '%')) {
 	plist = H5Pcreate (H5P_FILE_ACCESS);
-	H5Pset_family (plist, H5P_DEFAULT);
+	H5Pset_family (plist, 0, H5P_DEFAULT);
     }
     if ((fid = H5Fopen(argv[1], H5F_ACC_RDONLY, plist)) < 0) {
         fprintf(stderr, "cannot open file\n");
@@ -78,10 +78,10 @@ main(int argc, char *argv[])
     H5F_addr_reset(&extra);
     if (argc > 2) {
         printf("New address: %s\n", argv[2]);
-        addr.offset = HDstrtol(argv[2], NULL, 0);
+        addr.offset = HDstrtoll(argv[2], NULL, 0);
     }
     if (argc > 3) {
-        extra.offset = HDstrtol(argv[3], NULL, 0);
+        extra.offset = HDstrtoll(argv[3], NULL, 0);
     }
     /*
      * Read the signature at the specified file position.
diff --git a/src/h5ls.c b/src/h5ls.c
index 1bc5570..45fcaa2 100644
--- a/src/h5ls.c
+++ b/src/h5ls.c
@@ -11,7 +11,7 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include <H5config.h>
+#include <H5private.h>
 #ifndef HAVE_ATTRIBUTE
 #   undef __attribute__
 #   define __attribute__(X) /*void*/
@@ -57,7 +57,7 @@ list (hid_t group, const char *name, void __unused__ *op_data)
 	int ndims = H5Sget_dims (space, size);
 	printf (" Dataset {");
 	for (i=0; i<ndims; i++) {
-	    printf ("%s%lu", i?", ":"", (unsigned long)size[i]);
+	    HDfprintf (stdout, "%s%Hu", i?", ":"", size[i]);
 	}
 	printf ("}\n");
 	H5Dclose (space);
@@ -110,7 +110,7 @@ main (int argc, char *argv[])
      */
     if (strchr (fname, '%')) {
 	plist = H5Pcreate (H5P_FILE_ACCESS);
-	H5Pset_family (plist, H5P_DEFAULT);
+	H5Pset_family (plist, 0, H5P_DEFAULT);
     }
     file = H5Fopen (fname, H5F_ACC_RDONLY, plist);
     assert (file>=0);
diff --git a/test/.distdep b/test/.distdep
index 45b0ac7..409acbb 100644
--- a/test/.distdep
+++ b/test/.distdep
@@ -148,6 +148,13 @@ dtypes.o: \
    ../src/H5private.h \
    ../src/H5Tprivate.h \
    ../src/H5Gprivate.h
+hyperslab.o: \
+   hyperslab.c \
+   ../src/H5private.h \
+   ../src/H5public.h \
+   ../src/H5config.h \
+   ../src/H5MMprivate.h \
+   ../src/H5MMpublic.h
 istore.o: \
    istore.c \
    ../src/H5private.h \
@@ -193,6 +200,26 @@ dsets.o: \
    ../src/H5Ppublic.h \
    ../src/H5Spublic.h \
    ../src/H5Tpublic.h
+cmpd_dset.o: \
+   cmpd_dset.c \
+   ../src/hdf5.h \
+   ../src/H5public.h \
+   ../src/H5config.h \
+   ../src/H5ACpublic.h \
+   ../src/H5Bpublic.h \
+   ../src/H5Dpublic.h \
+   ../src/H5Ipublic.h \
+   ../src/H5Epublic.h \
+   ../src/H5Fpublic.h \
+   ../src/H5Gpublic.h \
+   ../src/H5HGpublic.h \
+   ../src/H5HLpublic.h \
+   ../src/H5MFpublic.h \
+   ../src/H5MMpublic.h \
+   ../src/H5Opublic.h \
+   ../src/H5Ppublic.h \
+   ../src/H5Spublic.h \
+   ../src/H5Tpublic.h
 extend.o: \
    extend.c \
    ../src/hdf5.h \
@@ -212,6 +239,26 @@ extend.o: \
    ../src/H5Opublic.h \
    ../src/H5Ppublic.h \
    ../src/H5Spublic.h
+external.o: \
+   external.c \
+   ../src/hdf5.h \
+   ../src/H5public.h \
+   ../src/H5config.h \
+   ../src/H5ACpublic.h \
+   ../src/H5Bpublic.h \
+   ../src/H5Dpublic.h \
+   ../src/H5Ipublic.h \
+   ../src/H5Epublic.h \
+   ../src/H5Fpublic.h \
+   ../src/H5Gpublic.h \
+   ../src/H5HGpublic.h \
+   ../src/H5HLpublic.h \
+   ../src/H5MFpublic.h \
+   ../src/H5MMpublic.h \
+   ../src/H5Opublic.h \
+   ../src/H5Ppublic.h \
+   ../src/H5Spublic.h \
+   ../src/H5Tpublic.h
 iopipe.o: \
    iopipe.c \
    ../src/hdf5.h \
@@ -267,15 +314,8 @@ shtype.o: \
    ../src/H5Opublic.h \
    ../src/H5Ppublic.h \
    ../src/H5Spublic.h
-hyperslab.o: \
-   hyperslab.c \
-   ../src/H5private.h \
-   ../src/H5public.h \
-   ../src/H5config.h \
-   ../src/H5MMprivate.h \
-   ../src/H5MMpublic.h
-external.o: \
-   external.c \
+big.o: \
+   big.c \
    ../src/hdf5.h \
    ../src/H5public.h \
    ../src/H5config.h \
@@ -292,25 +332,4 @@ external.o: \
    ../src/H5MMpublic.h \
    ../src/H5Opublic.h \
    ../src/H5Ppublic.h \
-   ../src/H5Spublic.h \
-   ../src/H5Tpublic.h
-cmpd_dset.o: \
-   cmpd_dset.c \
-   ../src/hdf5.h \
-   ../src/H5public.h \
-   ../src/H5config.h \
-   ../src/H5ACpublic.h \
-   ../src/H5Bpublic.h \
-   ../src/H5Dpublic.h \
-   ../src/H5Ipublic.h \
-   ../src/H5Epublic.h \
-   ../src/H5Fpublic.h \
-   ../src/H5Gpublic.h \
-   ../src/H5HGpublic.h \
-   ../src/H5HLpublic.h \
-   ../src/H5MFpublic.h \
-   ../src/H5MMpublic.h \
-   ../src/H5Opublic.h \
-   ../src/H5Ppublic.h \
-   ../src/H5Spublic.h \
-   ../src/H5Tpublic.h
+   ../src/H5Spublic.h
diff --git a/test/Makefile.in b/test/Makefile.in
index 10e9135..6ee08ad 100644
--- a/test/Makefile.in
+++ b/test/Makefile.in
@@ -12,7 +12,7 @@ CPPFLAGS=-I. -I../src @CPPFLAGS@
 # These are our main targets. They should be listed in the order to be
 # executed, generally most specific tests to least specific tests.
 PROGS=testhdf5 gheap hyperslab istore dtypes dsets cmpd_dset extend external \
-      shtype iopipe
+      shtype iopipe big
 TESTS=testhdf5 gheap hyperslab istore dtypes dsets cmpd_dset extend external \
       shtype
 TIMINGS=iopipe
@@ -32,7 +32,7 @@ MOSTLYCLEAN=cmpd_dset.h5 dataset.h5 extend.h5 istore.h5 tfile1.h5 tfile2.h5  \
 # overlap with other tests.
 PROG_SRC=testhdf5.c tfile.c theap.c tmeta.c tohdr.c tstab.c th5s.c dtypes.c  \
          hyperslab.c istore.c dsets.c cmpd_dset.c extend.c external.c \
-	 iopipe.c gheap.c shtype.c
+	 iopipe.c gheap.c shtype.c big.c
 PROG_OBJ=$(PROG_SRC:.c=.o)
 
 TESTHDF5_SRC=testhdf5.c tfile.c theap.c tmeta.c tohdr.c tstab.c th5s.c
@@ -71,6 +71,9 @@ SHTYPE_OBJ=$(SHTYPE_SRC:.c=.o)
 IOPIPE_SRC=iopipe.c
 IOPIPE_OBJ=$(IOPIPE_SRC:.c=.o)
 
+BIG_SRC=big.c
+BIG_OBJ=$(BIG_SRC:.c=.o)
+
 # Private header files (not to be installed)...
 PRIVATE_HDR=testhdf5.h
 
@@ -121,4 +124,7 @@ iopipe: $(IOPIPE_OBJ) ../src/libhdf5.a
 grptime: $(GRPTIME_OBJ) ../src/libhdf5.a
 	$(CC) $(CFLAGS) -o $@ $(GRPTIME_OBJ) ../src/libhdf5.a $(LIBS)
 
+big: $(BIG_OBJ) ../src/libhdf5.a
+	$(CC) $(CFLAGS) -o $@ $(BIG_OBJ) ../src/libhdf5.a $(LIBS)
+
 @CONCLUDE@
diff --git a/test/big.c b/test/big.c
new file mode 100644
index 0000000..44d550f
--- /dev/null
+++ b/test/big.c
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 1998 NCSA
+ *                    All rights reserved.
+ *
+ * Programmer:  Robb Matzke <matzke@llnl.gov>
+ *              Wednesday, April  8, 1998
+ */
+#include <assert.h>
+#include <hdf5.h>
+
+
+/*-------------------------------------------------------------------------
+ * Function:	main
+ *
+ * Purpose:	Creates a *big* dataset.
+ *
+ * Return:	Success:	
+ *
+ *		Failure:	
+ *
+ * Programmer:	Robb Matzke
+ *              Wednesday, April  8, 1998
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+int
+main (void)
+{
+    hsize_t	size1[4] = {8, 1024, 1024, 1024};
+    hsize_t	size2[1] = {8589934592LL};
+    hid_t	plist, file, space1, space2, dset;
+
+    /*
+     * Make sure that `hsize_t' is large enough to represent the entire data
+     * space.
+     */
+    assert (sizeof(hsize_t)>4);
+
+    /*
+     * We might be on a machine that has 32-bit files, so create an HDF5 file
+     * which is a family of files.  Each member of the family will be 1GB
+     */
+    plist = H5Pcreate (H5P_FILE_ACCESS);
+    H5Pset_family (plist, 30, H5P_DEFAULT);
+    file = H5Fcreate ("big%05d.h5", H5F_ACC_TRUNC, H5P_DEFAULT, plist);
+
+    /* Create simple data spaces according to the size specified above. */
+    space1 = H5Screate_simple (4, size1, size1);
+    space2 = H5Screate_simple (1, size2, size2);
+
+    /* Create the datasets */
+    dset = H5Dcreate (file, "d1", H5T_NATIVE_INT, space1, H5P_DEFAULT);
+    H5Dclose (dset);
+    dset = H5Dcreate (file, "d2", H5T_NATIVE_INT, space2, H5P_DEFAULT);
+    H5Dclose (dset);
+    
+    H5Sclose (space1);
+    H5Sclose (space2);
+    H5Fclose (file);
+    exit (0);
+}