#! /bin/sh
#
# Copyright by The HDF Group.
# Copyright by the Board of Trustees of the University of Illinois.
# All rights reserved.
#
# This file is part of HDF5.  The full HDF5 copyright notice, including
# terms governing use, modification, and redistribution, is contained in
# the files COPYING and Copyright.html.  COPYING can be found at the root
# of the source code distribution tree; Copyright.html can be found at the
# root level of an installed copy of the electronic HDF5 document set and
# is linked from the top-level documents page.  It can also be found at
# http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have
# access to either file, you may request a copy from help@hdfgroup.org.

#
# Tests for the H5check_version function.
#
# Programmer: Albert Cheng
#	      Sep 28, 2009

srcdir=@srcdir@

# Variables filled in by the configure process.
# Determine the configure options of the hdf5 library and executables.
Shared_Lib=@enable_shared@
Static_Lib=@enable_static@
Static_exec=@STATIC_EXEC@
h5haveexitcode=yes	# default is yes

CMP='cmp -s'
DIFF='diff -c'
RM='rm -f'

# Function definitions
#
# Show the purpose of this test script and a note about the abort messages.
PURPOSE() {
    echo "Tests for the H5check_version function."
    echo "Note that abort messages may appear due to the expected termination"
    echo "of the program when it is tested with mis-matched version numnbers."
}

# Print a line-line message left justified in a field of 70 characters.
#
LINEMSG() {
   SPACES="                                                               "
   echo "$* $SPACES" | cut -c1-70 | tr -d '\012'
}


# Print a "SKIP" message
SKIP() {
    LINEMSG $*
    echo  " -SKIP-"
}


# Print warning message of version mismatch.
WarnMesg(){
    echo "Warning! ***HDF5 interface incompatibility detected***"
    echo "The HDF5 header files used to compile this application are not compatible "
    echo "with the HDF5 library to which this application is linked."
    echo "Data corruption or segmentation faults may occur if the application continues."
    echo "This can happen when an application was compiled by one version of HDF5 but"
    echo "linked with a different version of static or shared HDF5 library."
    echo "You should recompile the application or check your shared library related"
    echo "settings such as 'LD_LIBRARY_PATH'."

    echo "You can, at your own risk, disable this warning by setting the environment"
    echo "variable 'HDF5_DISABLE_VERSION_CHECK' to a value of '1'."
    echo "Setting it to 2 or higher will suppress the warning messages totally."
    echo "Headers are $xxh5vers_interface_age.$xxh5vers_age.$xxh5vers_revision, library is $h5vers_interface_age.$h5vers_age.$h5vers_revision"
    test -n "$H5_HAVE_EMBEDDED_LIBINFO" && cat $h5libsettings
    echo "Bye..."
}
  

# Print warning message2 of version mismatch.
WarnMesg2(){
    echo "Warning! ***HDF5 interface incompatibility detected***"
    echo "The HDF5 header files used to compile this application are not compatible "
    echo "with the HDF5 library to which this application is linked."
    echo "Data corruption or segmentation faults may occur if the application continues."
    echo "This can happen when an application was compiled by one version of HDF5 but"
    echo "linked with a different version of static or shared HDF5 library."
    echo "You should recompile the application or check your shared library related"
    echo "settings such as 'LD_LIBRARY_PATH'."

    echo "'HDF5_DISABLE_VERSION_CHECK' environment variable is set to 1, application will"
    echo "continue at your own risk."
    echo "Headers are $xxh5vers_interface_age.$xxh5vers_age.$xxh5vers_revision, library is $h5vers_interface_age.$h5vers_age.$h5vers_revision"
    test -n "$H5_HAVE_EMBEDDED_LIBINFO" && cat $h5libsettings
}
  

# Run a test and print PASS or *FAIL*.  If a test fails then increment
# the `nerrors' global variable and (if $verbose is set) display the
# difference between the actual output and the expected output. The
# expected output generated according to the parameter values and compared
# against actual output. 
# The expected and actual output files are removed unless $HDF5_NOCLEANUP
# has a non-zero value.
# $1: the set value of $HDF5_DISABLE_VERSION_CHECK. (unset means not to set
#     it at all.
# $2: Change the version number(s) to cause a mismatch. (none means no
#     mismatch).
#
# Expected results:
# 		Value of $HDF5_DISABLE_VERSION_CHECK
#		unset	""	-1	0	1	2	3
# Matched	OK	OK	OK	OK	OK	OK	OK
# Mismatched	W/A	W/A	W/A	W/A	W2/OK	OK	W2/OK
# Result codes:
# OK:    No warning, exit 0.
# W/A:   Warning, abort and exit non-0.
# W2/OK: Different Warning, exit 0.
#
# Implemented only exit code matching. Still need to match output.
TESTING() {
    DEBUGPRINT command is $0 $*
    TEST_NAME=tcheck_version                  # The test name
    TEST_BIN=`pwd`/$TEST_NAME # The path of the test binary

    expect=${TEST_NAME}_expect.out
    actual=${TEST_NAME}_actual.out
    actual_err=${TEST_NAME}_actual.err
    arguments=

    h5DisableVersion="$1"
    wrongversionnumbers="$2"
    xxh5vers_interface=$h5vers_interface
    xxh5vers_age=$h5vers_age
    xxh5vers_revision=$h5vers_revision
    xxh5vers_interface_age=`expr $xxh5vers_interface - $xxh5vers_age`

    if [ "$h5DisableVersion" = unset ]; then
	envcmd=""		# noop
    else
	envcmd="env HDF5_DISABLE_VERSION_CHECK=$h5DisableVersion"
    fi

    if [ "$wrongversionnumbers" = none ]; then
	# OK: No warning, exit 0
	cp /dev/null $expect
	expect_code=0
    else
	arguments=-t"$wrongversionnumbers"
	# calculate mismatched version numbers by listing.
	case $wrongversionnumbers in
	    "I")    xxh5vers_interface=`expr $h5vers_interface + 1`
		    ;;
	    "A")    xxh5vers_age=`expr $h5vers_age + 1`
		    ;;
	    "R")    xxh5vers_revision=`expr $h5vers_revision + 1`
		    ;;
	esac
	xxh5vers_interface_age=`expr $xxh5vers_interface - $xxh5vers_age`
	case "$h5DisableVersion" in
	    1)
		# W2/OK: Different Warning, exit 0.
		WarnMesg2 > $expect
		expect_code=0
		;;
	    [2-9]|[1-9][0-9]*)
		# OK: No warning, exit 0
		cp /dev/null $expect
		expect_code=0
		;;
	    *)	# W/A:   Warning, abort and exit non-0.
		WarnMesg > $expect
		expect_code=6	# Signal Abort exit code (128+6)
		;;
	esac
    fi

    # Run test.
    LINEMSG $envcmd $TEST_NAME $arguments
    (
      $envcmd $RUNSERIAL $TEST_BIN  $arguments
    ) >$actual 2>$actual_err
    ret_code=$?
    cat $actual_err >> $actual
    
    if [ $h5haveexitcode = 'yes' -a \( $expect_code -ne $ret_code \) ]; then
	echo "*FAILED*"
	echo "    Expected exit code ($expect_code) differs from actual code ($ret_code)"
	nerrors="`expr $nerrors + 1`"
    elif $CMP $expect $actual; then
	echo " PASSED"
    else
	echo "*FAILED*"
	echo "    Expected result differs from actual result"
	nerrors="`expr $nerrors + 1`"
	test yes = "$verbose" && $DIFF $expect $actual |sed 's/^/    /'
    fi

    # Clean up output file. 
    # Also clean the core file generated by H5check_version's abort.
    if test -z "$HDF5_NOCLEANUP"; then
	$RM $expect $actual $actual_err
	$RM core
    fi
}


# Echo parameters for debugging if verbose mode is on.
DEBUGPRINT() {
    if [ -n "$debugmode" ]; then
	echo $*
    fi
}


# MAIN Body
nerrors=0
verbose=yes	# default on
debugmode=	# default off
H5_HAVE_EMBEDDED_LIBINFO=`grep '#define H5_HAVE_EMBEDDED_LIBINFO ' ../src/H5pubconf.h`
h5libsettings=../src/libhdf5.settings 

PURPOSE

# Figure out library version numbers from the header file.
h5vers_interface=`grep '#define LT_VERS_INTERFACE' $srcdir/../src/H5public.h | sed -e s/[^0-9]//g`
#echo h5vers_interface=$h5vers_interface
h5vers_revision=`grep '#define LT_VERS_REVISION' $srcdir/../src/H5public.h | sed -e s/[^0-9]//g`
#echo h5vers_revision=$h5vers_revision
h5vers_age=`grep '#define LT_VERS_AGE' $srcdir/../src/H5public.h | sed -e s/[^0-9]//g`
#echo h5vers_age=$h5vers_age
h5vers_interface_age=`expr $h5vers_interface - $h5vers_age`
#h5vers_interface=`grep '#define LT_VERS_INTERFACE' $srcdir/../src/H5public.h | cut -f2` 
#h5vers_revision=`grep '#define LT_VERS_REVISION' $srcdir/../src/H5public.h | cut -f2` 
#h5vers_age=`grep '#define LT_VERS_AGE' $srcdir/../src/H5public.h | cut -f2` 
DEBUGPRINT $h5vers_interface.$h5vers_revision.$h5vers_age
case "$h5vers_interface$h5vers_revision$h5vers_age" in
    [0-9]*)     # good. noop.
        ;;
    *)
        echo "Illegal library version numbers($h5vers_interface.$h5vers_revision.$h5vers_age)"
        echo "Test aborted"
        exit 1
        ;;
esac

# RUNSERIAL is used. Check if it can return exit code from executalbe correctly.
if [ -n "$RUNSERIAL_NOEXITCODE" ]; then
    echo "***Warning*** Serial Exit Code is not passed back to shell corretly."
    echo "***Warning*** Exit code checking is skipped."
    h5haveexitcode=no
fi

# Three Categories of tests:
# Normal: where the version numbers all matched (wrong_version == none).
# Mismatched version numbers (could be Interface or Age versions;
#       revision makes no differences in link compatibility check.)
# Test all the above with different values of the environment variable,
# HDF5_DISABLE_VERSION_CHECK, as unset, "", -1, 0, 1, 2, 3

for val_disable_version_check in unset "" -1 0 1 2 3; do
    for wrong_version in none I A; do
	TESTING "$val_disable_version_check" "$wrong_version"
    done
done


# Check and report results.
if [ $nerrors -gt 0 ]; then
    echo "***$nerrors errors encountered***"
    exit 1
else
    echo "No error encountered"
    exit 0
fi