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// compare_patterns.cc -*-c++-*-
//
// Copyright (C) 2008-2009 Daniel Burrows
//
// 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 2 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; see the file COPYING. If not, write to
// the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA.
#include "compare_patterns.h"
#include "pattern.h"
using cwidget::util::ref_ptr;
namespace aptitude
{
namespace matching
{
inline
int compare_regex_info(const pattern::regex_info &r1,
const pattern::regex_info &r2)
{
return r1.get_regex_string().compare(r2.get_regex_string());
}
template<typename I>
inline int compare_int(I i1, I i2)
{
return i1 - i2;
}
int compare_pattern_lists(const std::vector<ref_ptr<pattern> > &l1,
const std::vector<ref_ptr<pattern> > &l2)
{
std::vector<ref_ptr<pattern> >::const_iterator
begin1 = l1.begin(), end1 = l1.end(),
begin2 = l2.begin(), end2 = l2.end();
while(begin1 != end1 && begin2 != end2)
{
int cmp = compare_patterns(*begin1, *begin2);
if(cmp != 0)
return cmp;
++begin1;
++begin2;
}
if(begin1 != end1)
return 1;
else if(begin2 != end2)
return -1;
else
return 0;
}
int compare_patterns(const ref_ptr<pattern> &p1,
const ref_ptr<pattern> &p2)
{
// If the patterns have different constructors, order them
// according to their constructors.
if(p1->get_type() < p2->get_type())
return -1;
else if(p1->get_type() > p2->get_type())
return 1;
else
switch(p1->get_type())
{
case pattern::archive:
return compare_regex_info(p1->get_archive_regex_info(),
p2->get_archive_regex_info());
case pattern::action:
return compare_int(p1->get_action_action_type(), p2->get_action_action_type());
if(p1->get_action_action_type() < p2->get_action_action_type())
return -1;
else if(p1->get_action_action_type() > p2->get_action_action_type())
return 1;
else
return 0;
case pattern::all_versions:
return compare_patterns(p1->get_all_versions_pattern(),
p2->get_all_versions_pattern());
case pattern::any_version:
return compare_patterns(p1->get_any_version_pattern(),
p2->get_any_version_pattern());
case pattern::architecture:
return p1->get_architecture_arch_specification()->get_specification()
.compare(p2->get_architecture_arch_specification()->get_specification());
case pattern::automatic:
return 0;
case pattern::and_tp:
return compare_pattern_lists(p1->get_and_patterns(),
p2->get_and_patterns());
case pattern::bind:
{
const int name_cmp = compare_int(p1->get_bind_variable_index(), p2->get_bind_variable_index());
if(name_cmp != 0)
return name_cmp;
return compare_patterns(p1->get_bind_pattern(),
p2->get_bind_pattern());
}
case pattern::broken:
return 0;
case pattern::broken_type:
return compare_int(p1->get_broken_type_depends_type(),
p2->get_broken_type_depends_type());
case pattern::candidate_version:
return 0;
case pattern::config_files:
return 0;
case pattern::current_version:
return 0;
case pattern::depends:
{
const int type_cmp = compare_int(p1->get_depends_depends_type(),
p2->get_depends_depends_type());
if(type_cmp != 0)
return type_cmp;
const int broken_cmp = compare_int(p1->get_depends_broken() ? 1 : 0,
p2->get_depends_broken() ? 1 : 0);
if(broken_cmp != 0)
return broken_cmp;
return compare_patterns(p1->get_depends_pattern(),
p2->get_depends_pattern());
}
case pattern::description:
return compare_regex_info(p1->get_description_regex_info(),
p2->get_description_regex_info());
case pattern::essential:
return 0;
case pattern::equal:
return compare_int(p1->get_equal_stack_position(),
p2->get_equal_stack_position());
case pattern::exact_name:
return p1->get_exact_name_name().compare(p2->get_exact_name_name());
case pattern::false_tp:
return 0;
case pattern::for_tp:
// Correct comparison here relies on the fact that
// variable names are lower-case.
{
const int variable_name_cmp =
p1->get_for_variable_name().compare(p2->get_for_variable_name());
if(variable_name_cmp != 0)
return variable_name_cmp;
return compare_patterns(p1->get_for_pattern(),
p2->get_for_pattern());
}
case pattern::foreign_architecture:
return 0;
case pattern::garbage:
return 0;
case pattern::install_version:
return 0;
case pattern::installed:
return 0;
case pattern::maintainer:
return compare_regex_info(p1->get_maintainer_regex_info(),
p2->get_maintainer_regex_info());
case pattern::multiarch:
return compare_int(p1->get_multiarch_multiarch_type(),
p2->get_multiarch_multiarch_type());
case pattern::name:
return compare_regex_info(p1->get_name_regex_info(),
p2->get_name_regex_info());
case pattern::narrow:
{
const int filter_cmp =
compare_patterns(p1->get_narrow_filter(),
p2->get_narrow_filter());
if(filter_cmp != 0)
return filter_cmp;
return compare_patterns(p1->get_narrow_pattern(),
p2->get_narrow_pattern());
}
case pattern::native_architecture:
return 0;
case pattern::new_tp:
return 0;
case pattern::not_tp:
return compare_patterns(p1->get_not_pattern(),
p2->get_not_pattern());
case pattern::obsolete:
return 0;
case pattern::or_tp:
return compare_pattern_lists(p1->get_or_patterns(),
p2->get_or_patterns());
case pattern::origin:
return compare_regex_info(p1->get_origin_regex_info(),
p2->get_origin_regex_info());
case pattern::priority:
return compare_int(p1->get_priority_priority(),
p2->get_priority_priority());
case pattern::provides:
return compare_patterns(p1->get_provides_pattern(),
p2->get_provides_pattern());
case pattern::reverse_depends:
{
const int type_cmp = compare_int(p1->get_reverse_depends_depends_type(),
p2->get_reverse_depends_depends_type());
if(type_cmp != 0)
return type_cmp;
const int broken_cmp = compare_int(p1->get_reverse_depends_broken() ? 1 : 0,
p2->get_reverse_depends_broken() ? 1 : 0);
if(broken_cmp != 0)
return broken_cmp;
return compare_patterns(p1->get_reverse_depends_pattern(),
p2->get_reverse_depends_pattern());
}
case pattern::reverse_provides:
return compare_patterns(p1->get_reverse_provides_pattern(),
p2->get_reverse_provides_pattern());
case pattern::section:
return compare_regex_info(p1->get_section_regex_info(),
p2->get_section_regex_info());
case pattern::source_package:
return compare_regex_info(p1->get_source_package_regex_info(),
p2->get_source_package_regex_info());
case pattern::source_version:
return compare_regex_info(p1->get_source_version_regex_info(),
p2->get_source_version_regex_info());
case pattern::tag:
return compare_regex_info(p1->get_tag_regex_info(),
p2->get_tag_regex_info());
case pattern::task:
return compare_regex_info(p1->get_task_regex_info(),
p2->get_task_regex_info());
case pattern::term:
return p1->get_term_term().compare(p2->get_term_term());
case pattern::term_prefix:
return p1->get_term_prefix_term().compare(p2->get_term_prefix_term());
case pattern::true_tp:
return 0;
case pattern::upgradable:
return 0;
case pattern::user_tag:
return compare_regex_info(p1->get_user_tag_regex_info(),
p2->get_user_tag_regex_info());
case pattern::version:
return compare_regex_info(p1->get_version_regex_info(),
p2->get_version_regex_info());
case pattern::virtual_tp:
return 0;
case pattern::widen:
return compare_patterns(p1->get_widen_pattern(),
p2->get_widen_pattern());
}
eassert(!"Internal error: we should never get here.");
}
}
}
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