# Copyright 2025 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 this program.  If not, see <http://www.gnu.org/licenses/>.

# Test 'forward-search' and 'reverse-search' commands.  This test
# relies on some hard-coded line numbers relating to the source file.
# We could switch to using gdb_get_line_number, but it doesn't feel
# like that would add much value; just don't change the source file.

standard_testfile

if { [prepare_for_testing "failed to prepare" $testfile $srcfile] } {
    return
}

gdb_test "forward-search This testcase is part" \
    "1\\s+/\\* This testcase is part of GDB, the GNU debugger\\." \
    "search for first line of the file"

gdb_test "forward-search This testcase is part" \
    "Expression not found" \
    "repeated search doesn't find the same first line"

# The 'reverse-search' command starts searching from the line before
# the last line displayed.  So in this case, the reverse search starts
# from line 0, i.e. nothing is searched.
gdb_test "reverse-search This testcase is part" \
    "Expression not found" \
    "reverse search doesn't find the first line either"

# List some source lines, and then perform some forward-searches.  The
# searches start from the first line after the last line displayed.
gdb_test "list 20" ".*" \
    "list source code ahead of a forward-search"
gdb_test "forward-search Line 2" \
    "25\\s+/\\* Line 25  \\*/" \
    "first forward-search after a list"
gdb_test "forward-search Line 2" \
    "26\\s+/\\* Line 26  \\*/" \
    "second forward-search after a list"
gdb_test "forward-search Line 2" \
    "27\\s+/\\* Line 27  \\*/" \
    "third forward-search after a list"

# Now reverse-search from where we got too.
gdb_test "reverse-search Line 2" \
    "26\\s+/\\* Line 26  \\*/" \
    "first reverse-search for 'Line 2'"
gdb_test "reverse-search Line 2" \
    "25\\s+/\\* Line 25  \\*/" \
    "second reverse-search for 'Line 2'"
gdb_test "reverse-search Line 2" \
    "24\\s+/\\* Line 24  \\*/" \
    "third reverse-search for 'Line 2'"

# List some source lines, and then perform a reverse-search.  The
# search starts frm the first line before the last line displayed.
gdb_test "list 20" ".*" \
    "list source code ahead of a reverse-search"
gdb_test "reverse-search Line 2" \
    "23\\s+/\\* Line 23  \\*/" \
    "reverse-search after a list"

# List the last lines of the file, then reverse search for the last
# line.  As reverse-search starts on the line before the last line
# displayed, this will fail to find the last line.
gdb_test "list 127"
gdb_test "reverse-search Last line" \
    "Expression not found" \
    "reverse search for the last line fails"

# List some lines from the middle of the file.  Then try an invalid
# 'list' command.  Finally, check searches pick up from the middle of
# the file where the first 'list' successfully completed.
foreach_with_prefix search_direction { forward reverse } {
    foreach_with_prefix bad_list { out-of-range backwards } {
	gdb_test "list 50"

	if { $bad_list eq "out-of-range" } {
	    gdb_test "list 1000" \
		"Line number 995 out of range; \[^\r\n\]+ has 127 lines\\."
	} else {
	    gdb_test_no_output "list 60,50"
	}

	if { $search_direction eq "forward" } {
	    set line 55
	} else {
	    set line 53
	}

	gdb_test "${search_direction}-search Line" \
	    "$line\\s+/\\* Line $line  \\*/"
    }
}