#!/usr/bin/perl -w

# Copyright 1999-2002 Patrik Stridvall
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#

# Note that winapi_check are using heuristics quite heavily.
# So always remember that:
#
# "Heuristics are bug ridden by definition.
#  If they didn't have bugs, then they'd be algorithms."
#
# In other words, reported bugs are only potential bugs not
# real bugs, so they are called issues rather than bugs.
#

use strict;

BEGIN {
    $0 =~ m%^(.*?/?tools)/winapi/winapi_check$%;
    require "$1/winapi/setup.pm";
}

use config qw(
    files_filter files_skip
    get_h_files
    $current_dir $wine_dir
);
use output qw($output);
use winapi_check_options qw($options);

BEGIN {
    if($options->progress) {
	$output->enable_progress;
    } else {
	$output->disable_progress;
    }
}

use modules qw($modules);
use nativeapi qw($nativeapi);
use winapi qw($win16api $win32api @winapis);

use preprocessor;
use type;
use util qw(is_subset);
use winapi_documentation;
use winapi_function;
use winapi_local;
use winapi_global;
use winapi_parser;

my %include2info;

if ($options->global) {
    my @files = get_h_files("winelib");

    my $progress_current = 0;
    my $progress_max = scalar(@files);

    foreach my $file (@files) {
	$progress_current++;
	$output->lazy_progress("$file: file $progress_current of $progress_max");

	my $file_dir = $file;
	if(!($file_dir =~ s%(.*?)/[^/]+$%$1%)) {
	    $file_dir = ".";
	}

	$include2info{$file} = { name => $file };

	open(IN, "< $wine_dir/$file");
	while(<IN>) {
	    if(/^\s*\#\s*include\s*\"(.*?)\"/) {
		my $header = $1;
		if(-e "$wine_dir/$file_dir/$header") {
		    $include2info{$file}{includes}{"$file_dir/$header"}++;
		} elsif(-e "$wine_dir/$file_dir/../$header") {
		    if($file_dir =~ m%^(.*?)/[^/]+$%) {
			$include2info{$file}{includes}{"$1/$header"}++;
		    } else {
			$include2info{$file}{includes}{"$header"}++;
		    }
		} elsif(-e "$wine_dir/include/$header") {
		    $include2info{$file}{includes}{"include/$header"}++;
		} elsif ($header ne "config.h") {
		    $output->write("$file: #include \"$header\" is not a local include\n");
		}
	    }
	}
	close(IN);
    }

    my @files2 = ("acconfig.h", "poppack.h", "pshpack1.h", "pshpack2.h", "pshpack4.h", "pshpack8.h",
                  "storage.h", "ver.h");
    foreach my $file2 (@files2) {
	$include2info{"include/$file2"}{used}++;
    }
}

my @c_files = $options->c_files;
@c_files = files_skip(@c_files);
@c_files = files_filter("winelib", @c_files);

my @h_files = $options->h_files;
@h_files = files_skip(@h_files);
@h_files = files_filter("winelib", @h_files);

my $all_modules = 0;
my %complete_module;
if($options->global) {
    my @complete_modules = $modules->complete_modules(\@c_files);

    foreach my $module (@complete_modules) {
	$complete_module{$module}++;
    }

    $all_modules = 1;
    foreach my $module ($modules->all_modules) {
	if(!$complete_module{$module}) {
	    $all_modules = 0;
	    if($wine_dir eq ".") {
		$output->write("*.c: module $module is not complete\n");
	    }
	}
    }
}

if(1) {
    foreach my $winapi (@winapis) {
	foreach my $broken_forward ($winapi->all_broken_forwards) {
	    (my $module, my $external_name, my $forward_module, my $forward_external_name) = @$broken_forward;
	    if($complete_module{$forward_module}) {
		$output->write("$module.spec: forward is broken: $external_name => $forward_module.$forward_external_name\n");
	    }
	}
    }
}

my $progress_current = 0;
my $progress_max = scalar(@c_files);

my %declared_functions;

if($options->headers) {
    $progress_max += scalar(@h_files);

    foreach my $file (@h_files) {
	my %functions;

	$progress_current++;
	$output->progress("$file: file $progress_current of $progress_max");

	my $found_c_comment = sub {
	    my $begin_line = shift;
	    my $end_line = shift;
	    my $comment = shift;

	    if(0) {
		if($begin_line == $end_line) {
		    $output->write("$file:$begin_line: $comment\n");
		} else {
		    $output->write("$file:$begin_line-$end_line: \\\n$comment\n");
		}
	    }
	};

	my $found_cplusplus_comment = sub {
	    my $line = shift;
	    my $comment = shift;

	    if($options->comments_cplusplus) {
		$output->write("$file:$line: C++ comments not allowed: $comment\n");
	    }
	};

	my $create_function = sub {
	    return 'winapi_function'->new;
	};

	my $found_function = sub {
	    my $function = shift;

	    my $internal_name = $function->internal_name;

	    $output->progress("$file (file $progress_current of $progress_max): $internal_name");
	    $output->prefix_callback(sub { return $function->prefix; });

	    my $function_line = $function->function_line;
	    my $linkage = $function->linkage;
	    my $external_name = $function->external_name;
	    my $statements = $function->statements;

	    if($options->headers_misplaced &&
	       !($function->is_win16 && $function->is_win32) &&
	       (($function->is_win16 && $file =~ /^include\/[^\/]*$/) ||
		($function->is_win32 && $file =~ /^include\/wine\/[^\/]*$/)))
	    {
		$output->write("declaration misplaced\n");
	    }

	    if(defined($external_name) && !defined($statements) &&
	       ($linkage eq "" || $linkage eq "extern"))
	    {
		my $previous_function = $declared_functions{$internal_name};
		if(!defined($previous_function)) {
		    $declared_functions{$internal_name} = $function;
		} elsif($options->headers_duplicated) {
		    my $file = $previous_function->file;
		    my $function_line = $previous_function->function_line;
		    if($file =~ /\.h$/) {
			$output->write("duplicate declaration (first declaration at $file:$function_line)\n");
		    }
		}
	    }
	    $output->prefix("");
	};

	my $create_type = sub {
	    return 'type'->new;
	};

	my $found_type = sub {
	    my $type = shift;
	};

	my $found_preprocessor = sub {
	    my $directive = shift;
	    my $argument = shift;
	};

	winapi_parser::parse_c_file($file, {
	    c_comment_found => $found_c_comment,
	    cplusplus_comment_found => $found_cplusplus_comment,
	    function_create => $create_function,
	    function_found => $found_function,
	    type_create => $create_type,
	    type_found => $found_type,
	    preprocessor_found => $found_preprocessor
	});
    }
}

my %module2functions = ();

foreach my $file (@c_files) {
    my %functions = ();
    my %includes = ();

    $includes{$file}++;

    my $file_module16 = $modules->allowed_modules_in_file("$current_dir/$file");
    my $file_module32 = $modules->allowed_modules_in_file("$current_dir/$file");

    $progress_current++;
    $output->progress("$file (file $progress_current of $progress_max)");

    my $file_dir = $file;
    if(!($file_dir =~ s/(.*?)\/[^\/]*$/$1/)) {
	$file_dir = ".";
    }

    my $found_c_comment = sub {
	my $begin_line = shift;
	my $end_line = shift;
	my $comment = shift;

	if(0) {
	    if($begin_line == $end_line) {
		$output->write("$file:$begin_line: $comment\n");
	    } else {
		$output->write("$file:$begin_line-$end_line: \\\n$comment\n");
	    }
	}
    };

    my $found_cplusplus_comment = sub {
	my $line = shift;
	my $comment = shift;

	if($options->comments_cplusplus) {
	    $output->write("$file:$line: C++ comments not allowed: $comment\n");
	}
    };

    my $create_function = sub {
	return 'winapi_function'->new;
    };

    my $found_function = sub {
	my $function = shift;

	my $internal_name = $function->internal_name;
	$functions{$internal_name} = $function;

	$output->progress("$file (file $progress_current of $progress_max): $internal_name");
	$output->prefix_callback(sub { return $function->prefix; });

	my $declared_function = $declared_functions{$internal_name};

	my $documentation_line = $function->documentation_line;
	my $documentation = $function->documentation;
	my $linkage = $function->linkage;
	my $return_type = $function->return_type;
	my $calling_convention = $function->calling_convention;
	my $statements = $function->statements;

	my $module16 = $function->module16;
	my $module32 = $function->module32;

	my $external_name = $function->external_name;
	my $external_name16 = $function->external_name16;
	my $external_name32 = $function->external_name32;

	if(defined($external_name) && !defined($statements) &&
	   ($linkage eq "" || $linkage eq "extern"))
	{
	    my $previous_function = $declared_functions{$internal_name};
	    if(!defined($previous_function)) {
		$declared_functions{$internal_name} = $function;
	    } else {
		my $file = $previous_function->file;
		my $function_line = $previous_function->function_line;

		my $header = $file;
		$header =~ s%^(include|$file_dir)/%%;
		if($header !~ m%^msvcrt/% || $file_dir =~ m%^dlls/msvcrt%) {
		    $output->write("duplicate declaration (first declaration at $file:$function_line)\n");
		}
	    }
	}

	if ($options->global) {
	    foreach my $module ($function->modules) {
		$module2functions{$module}{$internal_name} = $function;
	    }
	}

	foreach my $module ($function->modules) {
	    $modules->found_module_in_dir($module, $file_dir);
	}

	if($options->shared) {
	    if($win16api->is_shared_internal_function($internal_name) ||
	       $win32api->is_shared_internal_function($internal_name))
	    {
		$output->write("is shared between Win16 and Win32\n");
	    }
	}

	if($options->headers && $options->headers_needed &&
	   defined($declared_function) && defined($external_name) &&
	   defined($statements))
	{
	    my $needed_include = $declared_function->file;

	    if(!defined($includes{$needed_include})) {
		my $header = $needed_include;
		$header =~ s%^(include|$file_dir)/%%;
		if($header !~ m%^msvcrt/% || $file_dir =~ m%^dlls/msvcrt%) {
		    $output->write("prototype not included: #include \"$header\" is needed\n");
		}
	    }
	}

	if($options->local && $options->argument && defined($statements)) {
	    winapi_local::check_function($function);
	}

	if($options->local && $options->statements && defined($statements)) {
	    winapi_local::check_statements(\%functions, $function);
	}

	if($options->local && $options->documentation &&
	   (defined($module16) || defined($module32)) &&
	   $linkage eq "" && defined($statements))
	{
	    winapi_documentation::check_documentation($function);
	}

	if(1) {
	    # FIXME: Not correct
	    if(defined($external_name16)) {
		$external_name16 = (split(/\s*&\s*/, $external_name16))[0];
	    }

	    # FIXME: Not correct
	    if(defined($external_name32)) {
		$external_name32 = (split(/\s*&\s*/, $external_name32))[0];
	    }

	    if($options->local && $options->misplaced &&
	       $linkage ne "extern" && defined($statements))
	    {
		if($options->win16 && $options->report_module($module16))
		{
		    if($file ne "library/port.c" &&
		       !$nativeapi->is_function($internal_name) &&
		       !is_subset($module16, $file_module16))
		    {
			foreach my $module16 (split(/\s*&\s*/, $module16)) {
			    if(!$win16api->is_function_stub($module16, $internal_name)) {
				$output->write("is misplaced ($module16)\n");
			    }
			}
		    }
		}

		if($options->win32 && $options->report_module($module32))
		{
		    if($file ne "library/port.c" &&
		       !$nativeapi->is_function($internal_name) &&
		       !is_subset($module32, $file_module32))
		    {
			foreach my $module32 (split(/\s*&\s*/, $module32)) {
			    if(!$win32api->is_function_stub($module32, $internal_name)) {
				$output->write("is misplaced ($module32)\n");
			    }
			}
		    }
		}
	    }

	    if($options->local && $options->headers && $options->prototype) {
		if($options->win16 && $options->report_module($module16)) {
		    if(!$nativeapi->is_function($internal_name) &&
		       !defined($declared_functions{$internal_name}))
		    {
			$output->write("no prototype\n");
		    }
		}

		if($options->win32 && $options->report_module($module32)) {
		    if(!defined($external_name32) || (!$nativeapi->is_function($external_name32) && 						          !defined($declared_functions{$external_name32})))
		    {
			if(!defined($external_name32) || ($external_name32 !~ /^Dll(?:
			   Install|CanUnloadNow|GetClassObject|GetVersion|
			   RegisterServer|RegisterServerEx|UnregisterServer)|DriverProc$/x &&
			   $internal_name !~ /^COMCTL32_Str/ &&
			   $internal_name !~ /^(?:\Q$module32\E|wine)_(?:\Q$external_name32\E|\d+)$/))
			{
			    $output->write("no prototype\n");
			}
		    }
		}
	    }
	}

	$output->prefix("");
    };

    my $config = 0;
    my $conditional = 0;
    my $found_include = sub {
	local $_ = shift;
	if(/^\"(?:config\.h|wine\/port\.h)\"/) {
	    $config++;
	}
    };
    my $found_conditional = sub {
	local $_ = shift;

	$nativeapi->found_conditional($_);

	if($options->config) {
	    if(!$nativeapi->is_conditional($_)) {
		if(/^HAVE_/ && !/^HAVE_(?:IPX|CORRECT_LINUXINPUT_H|OSS|OSS_MIDI|V4L2)$/)
		{
		    $output->write("$file: $_ is not declared as a conditional\n");
		}
	    } else {
		$conditional++;
		if(!$config) {
		    $output->write("$file: conditional $_ used but config.h is not included\n");
		}
	    }
	}
    };

    my $create_type = sub {
	return 'type'->new;
    };

    my $found_type = sub {
	my $type = shift;
    };

    my $preprocessor = 'preprocessor'->new($found_include, $found_conditional);
    my $found_preprocessor = sub {
	my $directive = shift;
	my $argument = shift;

	$preprocessor->directive($directive, $argument);

	if($options->config) {
	    if($directive eq "include") {
		my $header;
		my $check_protection;
		my $check_local;
		if($argument =~ /^<(.*?)>$/) {
		    $header = $1;
		    $check_protection = 1;
		    $check_local = 0;
		} elsif($argument =~ /^\"(.*?)\"$/) {
		    $header = $1;
		    $check_protection = 0;
		    $check_local = 1;
		} else {
		    $output->write("$file: #$directive $argument: is unparsable\n");

		    $header = undef;
		    $check_protection = 0;
		    $check_local = 0;
		}

		if(defined($header)) {
		    my $include;
		    if(-e "$wine_dir/include/$header") {
			$include = "include/$header";
		    } elsif(-e "$wine_dir/include/msvcrt/$header") {
			$include = "include/msvcrt/$header";
		    } elsif(-e "$file_dir/$header") {
			$include = "$file_dir/$header";
		    } elsif(-e "$file_dir/../$header") {
			if($file_dir =~ m%^(.*?)/[^/]+$%) {
			    $include = "$1/$header";
			} else {
			    $include = "$header";
			}
		    } elsif($check_local && $header ne "config.h") {
			$output->write("$file: #include \"$header\": file not found\n");
		    }

		    if(defined($include)) {
			$includes{$include}++;
			foreach my $include (keys(%{$include2info{$include}{includes}})) {
			    $includes{$include}++;
			}
		    }
		}

		if($check_protection && $header) {
		    if((-e "$wine_dir/include/$header" || -e "$wine_dir/$file_dir/$header")) {
			if($header !~ /^(?:oleauto\.h|win(?:base|def|error|gdi|nls|nt|user)\.h)$/ &&
			   $file_dir !~ /tests$/)
			{
			    $output->write("$file: #include \<$header\> is a local include\n");
			}
		    }

		    my $macro = uc($header);
		    $macro =~ y/\.\//__/;
		    $macro = "HAVE_" . $macro;

		    if($nativeapi->is_conditional_header($header)) {
			if(!$preprocessor->is_def($macro)) {
			    if($macro =~ /^HAVE_X11/) {
				# Do nothing X Windows is handled differently
			    } elsif($macro =~ /^HAVE_(.*?)_H$/) {
				my $name = $1;
				if($header !~ /^alloca\.h$/ &&
				   $file_dir !~ /tests$/ &&
				   !$preprocessor->is_def("STATFS_DEFINED_BY_$name"))
				{
				    $output->write("$file: #$directive $argument: is a conditional include, " .
						   "but is not protected\n");
				}
			    }
			}
		    } elsif($preprocessor->is_def($macro)) {
			$output->write("$file: #$directive $argument: is protected, but there is no check for it in configure.ac\n");
		    }
		}

		if($check_local && $header) {
		    if(-e "$file_dir/$header") {
			if($file_dir ne ".") {
			    $include2info{"$file_dir/$header"}{used}++;
			    foreach my $name (keys(%{$include2info{"$file_dir/$header"}{includes}})) {
				$include2info{$name}{used}++;
			    }
			} else {
			    $include2info{"$header"}{used}++;
			    foreach my $name (keys(%{$include2info{"$header"}{includes}})) {
				$include2info{$name}{used}++;
			    }
			}
		    } elsif(-e "$file_dir/../$header") {
			if($file_dir =~ m%^(.*?)/[^/]+$%) {
			    $include2info{"$1/$header"}{used}++;
			    foreach my $name (keys(%{$include2info{"$1/$header"}{includes}})) {
				$include2info{$name}{used}++;
			    }
			} else {
			    $include2info{"$header"}{used}++;
			    foreach my $name (keys(%{$include2info{"$header"}{includes}})) {
				$include2info{$name}{used}++;
			    }
			}
		    } elsif(-e "$wine_dir/include/$header") {
			$include2info{"include/$header"}{used}++;
			foreach my $name (keys(%{$include2info{"include/$header"}{includes}})) {
			    $include2info{$name}{used}++;
			}
		    } elsif(-e "$wine_dir/include/msvcrt/$header") {
			$include2info{"include/msvcrt/$header"}{used}++;
			foreach my $name (keys(%{$include2info{"include/msvcrt/$header"}{includes}})) {
			    $include2info{$name}{used}++;
			}
		    } elsif ($header ne "config.h") {
			$output->write("$file: #include \"$header\" is not a local include\n");
		    }
		}
	    }
	}
    };

    winapi_parser::parse_c_file($file, {
	c_comment_found => $found_c_comment,
	cplusplus_comment_found => $found_cplusplus_comment,
	function_create => $create_function,
	function_found => $found_function,
	type_create => $create_type,
	type_found => $found_type,
	preprocessor_found => $found_preprocessor
    });

    if($options->config_unnecessary) {
	if($config && $conditional == 0 && !exists($include2info{"include/wine/port.h"})) {
	    $output->write("$file: include2info config.h but do not use any conditionals\n");
	}
    }

    winapi_local::check_file($file, \%functions);
}

if($options->global) {
    winapi_global::check_modules(\%complete_module, \%module2functions);

    if($all_modules) {
	winapi_global::check_all_modules(\%include2info);
    }
}