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kicad/eeschema/sch_connection.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2018 CERN
* Copyright (C) 2021-2023 KiCad Developers, see AUTHORS.txt for contributors.
*
* @author Jon Evans <jon@craftyjon.com>
*
* 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. If not, see <http://www.gnu.org/licenses/>.
*/
#include <regex>
#include <wx/tokenzr.h>
#include <connection_graph.h>
#include <sch_symbol.h>
#include <sch_pin.h>
#include <sch_screen.h>
#include <project/net_settings.h>
#include <advanced_config.h>
#include <string_utils.h>
#include <sch_connection.h>
#include <boost/algorithm/string/join.hpp>
/**
*
* Buses can be defined in multiple ways. A bus vector consists of a prefix and
* a numeric range of suffixes:
*
* BUS_NAME[M..N]
*
* For example, the bus A[3..0] will contain nets A3, A2, A1, and A0.
* The BUS_NAME is required. M and N must be integers but do not need to be in
* any particular order -- A[0..3] produces the same result.
*
* Like net names, bus names cannot contain whitespace.
*
* A bus group is just a grouping of signals, separated by spaces, some
* of which may be bus vectors. Bus groups can have names, but do not need to.
*
* MEMORY{A[15..0] D[7..0] RW CE OE}
*
* In named bus groups, the net names are expanded as <BUS_NAME>.<NET_NAME>
* In the above example, the nets would be named like MEMORY.A15, MEMORY.D0, etc.
*
* {USB_DP USB_DN}
*
* In the above example, the bus is unnamed and so the underlying net names are
* just USB_DP and USB_DN.
*
*/
SCH_CONNECTION::SCH_CONNECTION( SCH_ITEM* aParent, const SCH_SHEET_PATH& aPath ) :
m_sheet( aPath ),
m_local_sheet( aPath ),
m_parent( aParent ),
m_driver( nullptr ),
m_graph( nullptr )
{
Reset();
}
SCH_CONNECTION::SCH_CONNECTION( CONNECTION_GRAPH* aGraph ) :
m_sheet( SCH_SHEET_PATH() ),
m_local_sheet( SCH_SHEET_PATH() ),
m_parent( nullptr ),
m_driver( nullptr ),
m_graph( aGraph )
{
Reset();
}
bool SCH_CONNECTION::operator==( const SCH_CONNECTION& aOther ) const
{
// NOTE: Not comparing m_dirty or net/bus/subgraph codes
if( ( aOther.m_driver == m_driver ) &&
( aOther.m_type == m_type ) &&
( aOther.m_name == m_name ) &&
( aOther.m_sheet == m_sheet ) )
{
return true;
}
return false;
}
void SCH_CONNECTION::SetDriver( SCH_ITEM* aItem )
{
m_driver = aItem;
recacheName();
for( const std::shared_ptr<SCH_CONNECTION>& member : m_members )
member->SetDriver( aItem );
}
void SCH_CONNECTION::SetSheet( SCH_SHEET_PATH aSheet )
{
m_sheet = aSheet;
m_local_sheet = aSheet;
recacheName();
for( const std::shared_ptr<SCH_CONNECTION>& member : m_members )
member->SetSheet( aSheet );
}
bool SCH_CONNECTION::operator!=( const SCH_CONNECTION& aOther ) const
{
return !( aOther == *this );
}
void SCH_CONNECTION::ConfigureFromLabel( const wxString& aLabel )
{
m_members.clear();
m_name = aLabel;
m_local_name = aLabel;
m_local_prefix = m_prefix;
wxString prefix;
std::vector<wxString> members;
wxString unescaped = UnescapeString( aLabel );
if( NET_SETTINGS::ParseBusVector( unescaped, &prefix, &members ) )
{
m_type = CONNECTION_TYPE::BUS;
m_vector_prefix = prefix;
long i = 0;
for( const wxString& vector_member : members )
{
auto member = std::make_shared<SCH_CONNECTION>( m_parent, m_sheet );
member->m_type = CONNECTION_TYPE::NET;
member->m_prefix = m_prefix;
member->m_local_name = vector_member;
member->m_local_prefix = m_prefix;
member->m_vector_index = i++;
member->SetName( vector_member );
member->SetGraph( m_graph );
m_members.push_back( member );
}
}
else if( NET_SETTINGS::ParseBusGroup( unescaped, &prefix, &members ) )
{
m_type = CONNECTION_TYPE::BUS_GROUP;
m_bus_prefix = prefix;
// Named bus groups generate a net prefix, unnamed ones don't
if( !prefix.IsEmpty() )
prefix += wxT( "." );
for( const wxString& group_member : members )
{
// Handle alias inside bus group member list
if( auto alias = m_graph->GetBusAlias( group_member ) )
{
for( const wxString& alias_member : alias->Members() )
{
auto member = std::make_shared< SCH_CONNECTION >( m_parent, m_sheet );
member->SetPrefix( prefix );
member->SetGraph( m_graph );
member->ConfigureFromLabel( alias_member );
m_members.push_back( member );
}
}
else
{
auto member = std::make_shared< SCH_CONNECTION >( m_parent, m_sheet );
member->SetPrefix( prefix );
member->SetGraph( m_graph );
member->ConfigureFromLabel( group_member );
m_members.push_back( member );
}
}
}
else
{
m_type = CONNECTION_TYPE::NET;
}
recacheName();
}
void SCH_CONNECTION::Reset()
{
m_type = CONNECTION_TYPE::NONE;
m_name.Empty();
m_local_name.Empty();
m_local_prefix.Empty();
m_cached_name.Empty();
m_cached_name_with_path.Empty();
m_prefix.Empty();
m_bus_prefix.Empty();
m_suffix .Empty();
m_lastDriver = m_driver;
m_driver = nullptr;
m_members.clear();
m_dirty = true;
m_net_code = 0;
m_bus_code = 0;
m_subgraph_code = 0;
m_vector_start = 0;
m_vector_end = 0;
m_vector_index = 0;
m_vector_prefix.Empty();
}
void SCH_CONNECTION::Clone( const SCH_CONNECTION& aOther )
{
m_graph = aOther.m_graph;
// Note: m_lastDriver is not cloned as it needs to be the last driver of *this* connection
m_driver = aOther.Driver();
m_sheet = aOther.Sheet();
// Note: m_local_sheet is not cloned
m_name = aOther.m_name;
// Note: m_local_name is not cloned if not set yet
if( m_local_name.IsEmpty() )
{
m_local_name = aOther.LocalName();
m_local_prefix = aOther.Prefix();
}
m_prefix = aOther.Prefix();
// m_bus_prefix is not cloned; only used for local names
m_suffix = aOther.Suffix();
m_net_code = aOther.NetCode();
m_bus_code = aOther.BusCode();
m_vector_start = aOther.VectorStart();
m_vector_end = aOther.VectorEnd();
// Note: m_vector_index is not cloned
m_vector_prefix = aOther.VectorPrefix();
// Note: subgraph code isn't cloned, it should remain with the original object
// Handle vector bus members: make sure local names are preserved where possible
const std::vector<std::shared_ptr<SCH_CONNECTION>>& otherMembers = aOther.Members();
if( m_type == CONNECTION_TYPE::BUS && aOther.Type() == CONNECTION_TYPE::BUS )
{
if( m_members.empty() )
{
m_members = otherMembers;
}
else
{
size_t cloneLimit = std::min( m_members.size(), otherMembers.size() );
for( size_t i = 0; i < cloneLimit; ++i )
m_members[i]->Clone( *otherMembers[i] );
}
}
else if( m_type == CONNECTION_TYPE::BUS_GROUP && aOther.Type() == CONNECTION_TYPE::BUS_GROUP )
{
if( m_members.empty() )
{
m_members = otherMembers;
}
else
{
// TODO: refactor this once we support deep nesting
for( std::shared_ptr<SCH_CONNECTION>& member : m_members )
{
auto it = std::find_if( otherMembers.begin(), otherMembers.end(),
[&]( const std::shared_ptr<SCH_CONNECTION>& aTest )
{
return aTest->LocalName() == member->LocalName();
} );
if( it != otherMembers.end() )
member->Clone( **it );
}
}
}
m_type = aOther.Type();
recacheName();
}
bool SCH_CONNECTION::IsDriver() const
{
wxASSERT( Parent() );
switch( Parent()->Type() )
{
case SCH_LABEL_T:
case SCH_GLOBAL_LABEL_T:
case SCH_HIER_LABEL_T:
case SCH_SHEET_PIN_T:
case SCH_SHEET_T:
case LIB_PIN_T:
return true;
case SCH_PIN_T:
{
SCH_PIN* pin = static_cast<SCH_PIN*>( Parent() );
// Only annotated symbols should drive nets.
return pin->IsGlobalPower() || pin->GetParentSymbol()->IsAnnotated( &m_sheet );
}
default:
return false;
}
}
bool SCH_CONNECTION::HasDriverChanged() const
{
return m_driver != m_lastDriver;
}
void SCH_CONNECTION::ClearDriverChanged()
{
m_lastDriver = m_driver;
}
wxString SCH_CONNECTION::Name( bool aIgnoreSheet ) const
{
wxASSERT( !m_cached_name.IsEmpty() );
return aIgnoreSheet ? m_cached_name : m_cached_name_with_path;
}
wxString SCH_CONNECTION::GetNetName() const
{
wxString retv;
if( m_graph )
{
CONNECTION_SUBGRAPH* subgraph = m_graph->GetSubgraphForItem( m_parent );
if( subgraph )
retv = subgraph->GetNetName();
}
return retv;
}
void SCH_CONNECTION::recacheName()
{
m_cached_name = m_name.IsEmpty() ? wxString( wxT( "<NO NET>" ) )
: wxString( m_prefix ) << m_name << m_suffix;
bool prepend_path = true;
if( !Parent() || m_type == CONNECTION_TYPE::NONE )
prepend_path = false;
if( m_driver )
{
switch( m_driver->Type() )
{
case SCH_GLOBAL_LABEL_T:
case SCH_PIN_T:
// Pins are either power connections or belong to a uniquely-annotated
// symbol, so they don't need a path if they are driving the subgraph.
prepend_path = false;
break;
default:
break;
}
}
m_cached_name_with_path = prepend_path ? m_sheet.PathHumanReadable() << m_cached_name
: m_cached_name;
}
void SCH_CONNECTION::SetPrefix( const wxString& aPrefix )
{
m_prefix = aPrefix;
recacheName();
for( const std::shared_ptr<SCH_CONNECTION>& m : Members() )
m->SetPrefix( aPrefix );
}
void SCH_CONNECTION::SetSuffix( const wxString& aSuffix )
{
m_suffix = aSuffix;
recacheName();
for( const std::shared_ptr<SCH_CONNECTION>& m : Members() )
m->SetSuffix( aSuffix );
}
void SCH_CONNECTION::AppendInfoToMsgPanel( std::vector<MSG_PANEL_ITEM>& aList ) const
{
wxString msg, group_name, members;
std::vector<wxString> group_members;
aList.emplace_back( _( "Connection Name" ), UnescapeString( Name() ) );
if( std::shared_ptr<BUS_ALIAS> alias = m_graph->GetBusAlias( m_name ) )
{
msg.Printf( _( "Bus Alias %s Members" ), m_name );
aList.emplace_back( msg, boost::algorithm::join( alias->Members(), " " ) );
}
else if( NET_SETTINGS::ParseBusGroup( m_name, &group_name, &group_members ) )
{
for( const wxString& group_member : group_members )
{
if( std::shared_ptr<BUS_ALIAS> group_alias = m_graph->GetBusAlias( group_member ) )
{
msg.Printf( _( "Bus Alias %s Members" ), group_alias->GetName() );
aList.emplace_back( msg, boost::algorithm::join( group_alias->Members(), " " ) );
}
}
}
#if defined(DEBUG)
// These messages are not flagged as translatable, because they are only debug messages
if( IsBus() )
aList.emplace_back( wxT( "Bus Code" ), wxString::Format( "%d", m_bus_code ) );
aList.emplace_back( wxT( "Subgraph Code" ), wxString::Format( "%d", m_subgraph_code ) );
if( SCH_ITEM* driver = Driver() )
{
UNITS_PROVIDER unitsProvider( schIUScale, EDA_UNITS::MILLIMETRES );
msg.Printf( wxS( "%s at %p" ), driver->GetItemDescription( &unitsProvider ), driver );
aList.emplace_back( wxT( "Connection Source" ), msg );
}
#endif
}
bool SCH_CONNECTION::IsBusLabel( const wxString& aLabel )
{
const wxString& unescaped = UnescapeString( aLabel );
return NET_SETTINGS::ParseBusVector( unescaped, nullptr, nullptr )
|| NET_SETTINGS::ParseBusGroup( unescaped, nullptr, nullptr );
}
bool SCH_CONNECTION::MightBeBusLabel( const wxString& aLabel )
{
// Weak heuristic for performance reasons. Stronger test will be used for connectivity
wxString label = UnescapeString( aLabel );
return label.Contains( wxT( "[" ) ) || label.Contains( wxT( "{" ) );
}
const std::vector< std::shared_ptr< SCH_CONNECTION > > SCH_CONNECTION::AllMembers() const
{
std::vector< std::shared_ptr< SCH_CONNECTION > > ret( m_members );
for( const std::shared_ptr<SCH_CONNECTION>& member : m_members )
{
if( member->IsBus() )
ret.insert( ret.end(), member->Members().begin(), member->Members().end() );
}
return ret;
}
static bool isSuperSubOverbar( wxChar c )
{
return c == '_' || c == '^' || c == '~';
};
wxString SCH_CONNECTION::PrintBusForUI( const wxString& aGroup )
{
size_t groupLen = aGroup.length();
size_t i = 0;
wxString ret;
int braceNesting = 0;
// Parse prefix
//
for( ; i < groupLen; ++i )
{
if( isSuperSubOverbar( aGroup[i] ) && i + 1 < groupLen && aGroup[i+1] == '{' )
{
braceNesting++;
i++;
continue;
}
else if( aGroup[i] == '}' )
{
braceNesting--;
continue;
}
ret += aGroup[i];
if( aGroup[i] == '{' )
break;
}
// Parse members
//
i++; // '{' character
for( ; i < groupLen; ++i )
{
if( isSuperSubOverbar( aGroup[i] ) && i + 1 < groupLen && aGroup[i+1] == '{' )
{
braceNesting++;
i++;
continue;
}
else if( aGroup[i] == '}' )
{
braceNesting--;
continue;
}
ret += aGroup[i];
if( aGroup[i] == '}' )
break;
}
return ret;
}
bool SCH_CONNECTION::IsSubsetOf( SCH_CONNECTION* aOther ) const
{
if( !aOther->IsBus() )
return false;
for( const std::shared_ptr<SCH_CONNECTION>& member : aOther->Members() )
{
if( member->FullLocalName() == FullLocalName() )
return true;
}
return false;
}
bool SCH_CONNECTION::IsMemberOfBus( SCH_CONNECTION* aOther ) const
{
if( !aOther->IsBus() )
return false;
wxString me = Name( true );
for( const std::shared_ptr<SCH_CONNECTION>& m : aOther->Members() )
{
if( m->Name( true ) == me )
return true;
}
return false;
}
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