common.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2014-2020 Jean-Pierre Charras, jp.charras at wanadoo.fr
 * Copyright (C) 2008 Wayne Stambaugh <[email protected]>
 * Copyright (C) 1992-2021 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * 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, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include <eda_base_frame.h>
#include <kiplatform/app.h>
#include <project.h>
#include <common.h>
#include <reporter.h>
#include <macros.h>
#include <mutex>
#include <wx/config.h>
#include <wx/log.h>
#include <wx/msgdlg.h>
#include <wx/stdpaths.h>
#include <wx/url.h>
#include <wx/utils.h>

#ifdef _WIN32
#include <Windows.h>
#endif


enum Bracket
{
 Bracket_None,
 Bracket_Normal = ')',
 Bracket_Curly = '}',
#ifdef __WINDOWS__
 Bracket_Windows = '%', // yeah, Windows people are a bit strange ;-)
#endif
 Bracket_Max
};


wxString ExpandTextVars( const wxString& aSource, const PROJECT* aProject )
{
 return ExpandTextVars( aSource, nullptr, nullptr, aProject );
}


wxString ExpandTextVars( const wxString& aSource,
 const std::function<bool( wxString* )>* aLocalResolver,
 const std::function<bool( wxString* )>* aFallbackResolver,
 const PROJECT* aProject )
{
 wxString newbuf;
 size_t sourceLen = aSource.length();

 newbuf.Alloc( sourceLen ); // best guess (improves performance)

 for( size_t i = 0; i < sourceLen; ++i )
 {
 if( aSource[i] == '$' && i + 1 < sourceLen && aSource[i+1] == '{' )
 {
 wxString token;

 for( i = i + 2; i < sourceLen; ++i )
 {
 if( aSource[i] == '}' )
 break;
 else
 token.append( aSource[i] );
 }

 if( token.IsEmpty() )
 continue;

 if( aLocalResolver && (*aLocalResolver)( &token ) )
 {
 newbuf.append( token );
 }
 else if( aProject && aProject->TextVarResolver( &token ) )
 {
 newbuf.append( token );
 }
 else if( aFallbackResolver && (*aFallbackResolver)( &token ) )
 {
 newbuf.append( token );
 }
 else
 {
 // Token not resolved: leave the reference unchanged
 newbuf.append( "${" + token + "}" );
  }
 }
 else
 {
 newbuf.append( aSource[i] );
 }
 }

 return newbuf;
}


//
// Stolen from wxExpandEnvVars and then heavily optimized
//
wxString KIwxExpandEnvVars( const wxString& str, const PROJECT* aProject )
{
 size_t strlen = str.length();

 wxString strResult;
 strResult.Alloc( strlen ); // best guess (improves performance)

 for( size_t n = 0; n < strlen; n++ )
 {
 wxUniChar str_n = str[n];

 switch( str_n.GetValue() )
 {
#ifdef __WINDOWS__
 case wxT( '%' ):
#endif // __WINDOWS__
 case wxT( '$' ):
 {
 Bracket bracket;
#ifdef __WINDOWS__
 if( str_n == wxT( '%' ) )
 bracket = Bracket_Windows;
 else
#endif // __WINDOWS__
 if( n == strlen - 1 )
 {
 bracket = Bracket_None;
 }
 else
 {
 switch( str[n + 1].GetValue() )
 {
 case wxT( '(' ):
 bracket = Bracket_Normal;
 str_n = str[++n]; // skip the bracket
 break;

 case wxT( '{' ):
 bracket = Bracket_Curly;
 str_n = str[++n]; // skip the bracket
 break;

 default:
 bracket = Bracket_None;
 }
 }

 size_t m = n + 1;

 if( m >= strlen )
 break;

 wxUniChar str_m = str[m];

 while( wxIsalnum( str_m ) || str_m == wxT( '_' ) || str_m == wxT( ':' ) )
 {
 if( ++m == strlen )
 {
 str_m = 0;
 break;
 }

 str_m = str[m];
 }

 wxString strVarName( str.c_str() + n + 1, m - n - 1 );

 // NB: use wxGetEnv instead of wxGetenv as otherwise variables
 // set through wxSetEnv may not be read correctly!
 bool expanded = false;
 wxString tmp = strVarName;

 if( aProject && aProject->TextVarResolver( &tmp ) )
 {
 strResult += tmp;
 expanded = true;
 }
 else if( wxGetEnv( strVarName, &tmp ) )
 {
 strResult += tmp;
 expanded = true;
 }
 else
 {
 // variable doesn't exist => don't change anything
#ifdef __WINDOWS__
 if ( bracket != Bracket_Windows )
#endif
 if ( bracket != Bracket_None )
 strResult << str[n - 1];

 strResult << str_n << strVarName;
 }

 // check the closing bracket
 if( bracket != Bracket_None )
 {
 if( m == strlen || str_m != (wxChar)bracket )
 {
 // under MSW it's common to have '%' characters in the registry
 // and it's annoying to have warnings about them each time, so
 // ignore them silently if they are not used for env vars
 //
 // under Unix, OTOH, this warning could be useful for the user to
 // understand why isn't the variable expanded as intended
#ifndef __WINDOWS__
 wxLogWarning( _( "Environment variables expansion failed: missing '%c' "
 "at position %u in '%s'." ),
 (char)bracket, (unsigned int) (m + 1), str.c_str() );
#endif // __WINDOWS__
 }
 else
 {
 // skip closing bracket unless the variables wasn't expanded
 if( !expanded )
 strResult << (wxChar)bracket;

 m++;
 }
 }

 n = m - 1; // skip variable name
 str_n = str[n];
 }
 break;

 case wxT( '\\' ):
 // backslash can be used to suppress special meaning of % and $
 if( n < strlen - 1 && (str[n + 1] == wxT( '%' ) || str[n + 1] == wxT( '$' )) )
 {
 str_n = str[++n];
  strResult += str_n;

 break;
 }
 KI_FALLTHROUGH;

 default:
 strResult += str_n;
 }
 }

 return strResult;
}


const wxString ExpandEnvVarSubstitutions( const wxString& aString, PROJECT* aProject )
{
 // wxGetenv( wchar_t* ) is not re-entrant on linux.
 // Put a lock on multithreaded use of wxGetenv( wchar_t* ), called from wxEpandEnvVars(),
 static std::mutex getenv_mutex;

 std::lock_guard<std::mutex> lock( getenv_mutex );

 // We reserve the right to do this another way, by providing our own member function.
 return KIwxExpandEnvVars( aString, aProject );
}


const wxString ResolveUriByEnvVars( const wxString& aUri, PROJECT* aProject )
{
 wxString uri = ExpandTextVars( aUri, aProject );

 // URL-like URI: return as is.
 wxURL url( uri );

 if( url.GetError() == wxURL_NOERR )
 return uri;

 // Otherwise, the path points to a local file. Resolve environment variables if any.
 return ExpandEnvVarSubstitutions( aUri, aProject );
}


bool EnsureFileDirectoryExists( wxFileName* aTargetFullFileName,
 const wxString& aBaseFilename,
 REPORTER* aReporter )
{
 wxString msg;
 wxString baseFilePath = wxFileName( aBaseFilename ).GetPath();

 // make aTargetFullFileName path, which is relative to aBaseFilename path (if it is not
 // already an absolute path) absolute:
 if( !aTargetFullFileName->MakeAbsolute( baseFilePath ) )
 {
 if( aReporter )
 {
 msg.Printf( _( "Cannot make path '%s' absolute with respect to '%s'." ),
  aTargetFullFileName->GetPath(),
 baseFilePath );
 aReporter->Report( msg, RPT_SEVERITY_ERROR );
 }

 return false;
 }

 // Ensure the path of aTargetFullFileName exists, and create it if needed:
 wxString outputPath( aTargetFullFileName->GetPath() );

 if( !wxFileName::DirExists( outputPath ) )
 {
 // Make every directory provided when the provided path doesn't exist
 if( wxFileName::Mkdir( outputPath, wxS_DIR_DEFAULT, wxPATH_MKDIR_FULL ) )
 {
 if( aReporter )
 {
 msg.Printf( _( "Output directory '%s' created." ), outputPath );
 aReporter->Report( msg, RPT_SEVERITY_INFO );
 return true;
 }
 }
 else
 {
 if( aReporter )
 {
 msg.Printf( _( "Cannot create output directory '%s'." ), outputPath );
 aReporter->Report( msg, RPT_SEVERITY_ERROR );
 }

 return false;
 }
 }

 return true;
}


bool matchWild( const char* pat, const char* text, bool dot_special )
{
 if( !*text )
 {
 /* Match if both are empty. */
 return !*pat;
 }

 const char *m = pat,
 *n = text,
 *ma = nullptr,
 *na = nullptr;
 int just = 0,
 acount = 0,
 count = 0;

 if( dot_special && (*n == '.') )
 {
 /* Never match so that hidden Unix files
 * are never found. */
 return false;
 }

 for(;;)
 {
 if( *m == '*' )
 {
 ma = ++m;
 na = n;
 just = 1;
 acount = count;
 }
 else if( *m == '?' )
 {
 m++;

 if( !*n++ )
 return false;
 }
 else
 {
 if( *m == '\\' )
 {
 m++;

 /* Quoting "nothing" is a bad thing */
 if( !*m )
 return false;
 }

 if( !*m )
 {
 /*
 * If we are out of both strings or we just
 * saw a wildcard, then we can say we have a
 * match
 */
 if( !*n )
 return true;

 if( just )
 return true;

 just = 0;
 goto not_matched;
 }

 /*
 * We could check for *n == NULL at this point, but
 * since it's more common to have a character there,
 * check to see if they match first (m and n) and
 * then if they don't match, THEN we can check for
 * the NULL of n
 */
 just = 0;

 if( *m == *n )
 {
 m++;
 count++;
 n++;
 }
 else
 {
 not_matched:

 /*
 * If there are no more characters in the
 * string, but we still need to find another
 * character (*m != NULL), then it will be
 * impossible to match it
 */
 if( !*n )
 return false;

 if( ma )
 {
 m = ma;
 n = ++na;
 count = acount;
 }
 else
 return false;
 }
 }
 }
}


#if wxUSE_DATETIME && defined(__WIN32__) && !defined(__WXMICROWIN__)

// Convert between wxDateTime and FILETIME which is a 64-bit value representing
// the number of 100-nanosecond intervals since January 1, 1601 UTC.
//
// This is the offset between FILETIME epoch and the Unix/wxDateTime Epoch.
static wxInt64 EPOCH_OFFSET_IN_MSEC = wxLL(11644473600000);


static void ConvertFileTimeToWx( wxDateTime* dt, const FILETIME& ft )
{
 wxLongLong t( ft.dwHighDateTime, ft.dwLowDateTime );
 t /= 10000; // Convert hundreds of nanoseconds to milliseconds.
 t -= EPOCH_OFFSET_IN_MSEC;

 *dt = wxDateTime( t );
}

#endif // wxUSE_DATETIME && __WIN32__


long long TimestampDir( const wxString& aDirPath, const wxString& aFilespec )
{
 long long timestamp = 0;

#if defined( __WIN32__ )
 // Win32 version.
 // Save time by not searching for each path twice: once in wxDir.GetNext() and once in
 // wxFileName.GetModificationTime(). Also cuts out wxWidgets' string-matching and case
 // conversion by staying on the MSW side of things.
 std::wstring filespec( aDirPath.t_str() );
 filespec += '\\';
 filespec += aFilespec.t_str();

 WIN32_FIND_DATA findData;
 wxDateTime lastModDate;

 HANDLE fileHandle = ::FindFirstFile( filespec.data(), &findData );

 if( fileHandle != INVALID_HANDLE_VALUE )
 {
 do
 {
 ConvertFileTimeToWx( &lastModDate, findData.ftLastWriteTime );
 timestamp += lastModDate.GetValue().GetValue();

 // Get the file size (partial) as well to check for sneaky changes.
 timestamp += findData.nFileSizeLow;
 }
 while ( FindNextFile( fileHandle, &findData ) != 0 );
 }

 FindClose( fileHandle );
#else
 // POSIX version.
 // Save time by not converting between encodings -- do everything on the file-system side.
 std::string filespec( aFilespec.fn_str() );
 std::string dir_path( aDirPath.fn_str() );

 DIR* dir = opendir( dir_path.c_str() );

 if( dir )
 {
 for( dirent* dir_entry = readdir( dir ); dir_entry; dir_entry = readdir( dir ) )
 {
 if( !matchWild( filespec.c_str(), dir_entry->d_name, true ) )
 continue;

 std::string entry_path = dir_path + '/' + dir_entry->d_name;
 struct stat entry_stat;

 if( wxCRT_Lstat( entry_path.c_str(), &entry_stat ) == 0 )
 {
 // Timestamp the source file, not the symlink
 if( S_ISLNK( entry_stat.st_mode ) ) // wxFILE_EXISTS_SYMLINK
 {
 char buffer[ PATH_MAX + 1 ];
 ssize_t pathLen = readlink( entry_path.c_str(), buffer, PATH_MAX );

 if( pathLen > 0 )
 {
 struct stat linked_stat;
 buffer[ pathLen ] = '\0';
 entry_path = dir_path + buffer;

 if( wxCRT_Lstat( entry_path.c_str(), &linked_stat ) == 0 )
 {
 entry_stat = linked_stat;
 }
 else
 {
 // if we couldn't lstat the linked file we'll have to just use
 // the symbolic link info
 }
 }
 }

 if( S_ISREG( entry_stat.st_mode ) ) // wxFileExists()
 {
 timestamp += entry_stat.st_mtime * 1000;

 // Get the file size as well to check for sneaky changes.
 timestamp += entry_stat.st_size;
 }
 }
 else
 {
 // if we couldn't lstat the file itself all we can do is use the name
 timestamp += (signed) std::hash<std::string>{}( std::string( dir_entry->d_name ) );
 }
 }

 closedir( dir );
 }
#endif

 return timestamp;
}


bool WarnUserIfOperatingSystemUnsupported()
{
 if( !KIPLATFORM::APP::IsOperatingSystemUnsupported() )
 return false;

 wxMessageDialog dialog( nullptr, _( "This operating system is not supported "
 "by KiCad and its dependencies." ),
 _( "Unsupported Operating System" ),
 wxOK | wxICON_EXCLAMATION );

 dialog.SetExtendedMessage( _( "Any issues with KiCad on this system cannot "
 "be reported to the official bugtracker." ) );
 dialog.ShowModal();

 return true;
}