#   Copyright (C) 2004-2020 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with GCC; see the file COPYING3.  If not see
# <http://www.gnu.org/licenses/>.

load_lib gcc-dg.exp
load_lib torture-options.exp

# Define gfortran callbacks for dg.exp.

proc gfortran-dg-test { prog do_what extra_tool_flags } {
    set result \
	[gcc-dg-test-1 gfortran_target_compile $prog $do_what $extra_tool_flags]
    
    set comp_output [lindex $result 0]
    set output_file [lindex $result 1]

    # gcc's default is to print the caret and source code, but
    # most test cases implicitly use the flag -fno-diagnostics-show-caret
    # to disable caret (and source code) printing.
    #
    # However, a few test cases override this back to the default by
    # explicily supplying "-fdiagnostics-show-caret", so that we can have
    # test coverage for caret/source code printing.
    #
    # gfortran error messages with caret-printing look like this:
    #     [name]:[locus]:
    #
    #        some code
    #              1
    #     Error: Some error at (1)
    # or
    #     [name]:[locus]:
    #
    #       some code
    #              1
    #     [name]:[locus2]:
    #
    #       some other code
    #         2
    #     Error: Some error at (1) and (2)
    # or
    #     [name]:[locus]:
    #
    #       some code and some more code
    #              1       2
    #     Error: Some error at (1) and (2)
    #
    # If this is such a test case, skip the rest of this function, so
    # that the test case can explicitly verify the output that it expects.
    if {[string first "-fdiagnostics-show-caret" $extra_tool_flags] >= 0} {
	return [list $comp_output $output_file]
    }

    # Otherwise, caret-printing is disabled.
    # gfortran errors with caret-printing disabled look like this:
    #     [name]:[locus]: Error: Some error
    # or
    #     [name]:[locus]: Error: (1)
    #     [name]:[locus2]: Error: Some error at (1) and (2)
    #
    # Where [locus] is either [line] or [line].[column] or
    # [line].[column]-[column] .
    #
    # We collapse these to look like:
    #  [name]:[line]:[column]: Error: Some error at (1) and (2)
    # or
    #  [name]:[line]:[column]: Error: Some error at (1) and (2)
    #  [name]:[line2]:[column]: Error: Some error at (1) and (2)
    #
    # Note that these regexps only make sense in the combinations used below.
    # Note also that is imperative that we first deal with the form with
    # two loci.
    set locus_regexp "(\[^\n\]+:\[0-9\]+)\[\.:\](\[0-9\]+)(-\[0-9\]+)?:\n\n\[^\n\]+\n\[^\n\]+\n"
    set diag_regexp "(\[^\n\]+)\n"

    # We proceed in steps:

    # 1. We add first a column number if none exists.
    # (Some Fortran diagnostics have the locus after Warning|Error)
    set colnum_regexp "(^|\n)(Warning: |Error: )?(\[^:\n\]+:\[0-9\]+):(\[ \n\])"
    regsub -all $colnum_regexp $comp_output "\\1\\3:0:\\4\\2" comp_output
    verbose "comput_output0:\n$comp_output"

    # 2. We deal with the form with two different locus lines,
    set two_loci "(^|\n)$locus_regexp$locus_regexp$diag_regexp"
    regsub -all $two_loci $comp_output "\\1\\2:\\3: \\8\n\\5\:\\6: \\8\n" comp_output
    verbose "comput_output1:\n$comp_output"

    set locus_prefix "(\[^:\n\]+:\[0-9\]+:\[0-9\]+: )(Warning: |Error: )"
    set two_loci2 "(^|\n)$locus_prefix\\(1\\)\n$locus_prefix$diag_regexp"
    regsub -all $two_loci2 $comp_output "\\1\\2\\3\\6\n\\4\\5\\6\n" comp_output
    verbose "comput_output2:\n$comp_output"

    # 3. then with the form with only one locus line.
    set single_locus "(^|\n)$locus_regexp$diag_regexp"
    regsub -all $single_locus $comp_output "\\1\\2:\\3: \\5\n" comp_output
    verbose "comput_output3:\n$comp_output"

    # 4. Add a line number if none exists
    regsub -all "(^|\n)(Warning: |Error: )" $comp_output "\\1:0:0: \\2" comp_output
    verbose "comput_output4:\n$comp_output"
    return [list $comp_output $output_file]
}

proc gfortran-dg-prune { system text } {
    return [gcc-dg-prune $system $text]
}

# Utility routines.

# Modified dg-runtest that can cycle through a list of optimization options
# as c-torture does.
proc gfortran-dg-runtest { testcases flags default-extra-flags } {
    global runtests
    global torture_with_loops

    # Some callers set torture options themselves; don't override those.
    set existing_torture_options [torture-options-exist]
    if { $existing_torture_options == 0 } {
	global DG_TORTURE_OPTIONS
	torture-init
	set-torture-options $DG_TORTURE_OPTIONS
    }
    dump-torture-options

    foreach test $testcases {
	# If we're only testing specific files and this isn't one of
	# them, skip it.
	if ![runtest_file_p $runtests $test] {
	    continue
        }

	# look if this is dg-do-run test, in which case
	# we cycle through the option list, otherwise we don't
	if [expr [search_for $test "dg-do run"]] {
	    set option_list $torture_with_loops
	} else {
	    set option_list [list { -O } ]
	}

	set nshort [file tail [file dirname $test]]/[file tail $test]
	list-module-names $test

	foreach flags_t $option_list {
	    verbose "Testing $nshort, $flags $flags_t" 1
	    dg-test $test "$flags $flags_t" ${default-extra-flags}
	    cleanup-modules ""
	}
    }

    if { $existing_torture_options == 0 } {
	torture-finish
    }
}

proc gfortran-dg-debug-runtest { target_compile trivial opt_opts testcases } {
    global srcdir subdir DEBUG_TORTURE_OPTIONS

    if ![info exists DEBUG_TORTURE_OPTIONS] {
       set DEBUG_TORTURE_OPTIONS ""
       set type_list [list "-gstabs" "-gstabs+" "-gxcoff" "-gxcoff+" "-gdwarf-2" ]
       foreach type $type_list {
           set comp_output [$target_compile \
                   "$srcdir/$subdir/$trivial" "trivial.S" assembly \
                   "additional_flags=$type"]
           if { [string match "exit status *" $comp_output] } {
               continue
           }
           if { [string match \
                       "* target system does not support the * debug format*" \
                       $comp_output]
           } {
               continue
           }
           remove-build-file "trivial.S"
           foreach level {1 "" 3} {
	       if { ($type == "-gdwarf-2") && ($level != "") } {
		   lappend DEBUG_TORTURE_OPTIONS [list "${type}" "-g${level}"]
		   foreach opt $opt_opts {
		       lappend DEBUG_TORTURE_OPTIONS \
			       [list "${type}" "-g${level}" "$opt" ]
		   }
	       } else {
		   lappend DEBUG_TORTURE_OPTIONS [list "${type}${level}"]
		   foreach opt $opt_opts {
		       lappend DEBUG_TORTURE_OPTIONS \
			       [list "${type}${level}" "$opt" ]
		   }
               }
           }
       }
    }

    verbose -log "Using options $DEBUG_TORTURE_OPTIONS"

    global runtests

    foreach test $testcases {
       # If we're only testing specific files and this isn't one of 
       # them, skip it.
       if ![runtest_file_p $runtests $test] {
           continue
       }

       set nshort [file tail [file dirname $test]]/[file tail $test]
	list-module-names $test

       foreach flags $DEBUG_TORTURE_OPTIONS {
           set doit 1
           # gcc-specific checking removed here

           if { $doit } {
               verbose -log "Testing $nshort, $flags" 1
               dg-test $test $flags ""
		cleanup-modules ""
           }
       }
    }
}