Subversion Repositories spk

#include "ModDiff.h"

#include "File_IO.h"

#include "CatFile.h"

CModDiff::CModDiff(CyString &dir, int maxPatch)

{

	m_bLoaded = LoadDirectory(dir);

	m_sTempDir = ".";

	m_iMaxPatch = maxPatch;

}

CModDiff::~CModDiff(void)

{

}

bool CModDiff::LoadDirectory(CyString &dir)

{

	m_sCurrentDir = dir;

	return m_fileSystem.LoadFilesystem(dir.ToString(), m_iMaxPatch);

}

bool CModDiff::CreateDiff(CyString &modfile)

{

	ClearError();

	//check for valid parameters

	if ( !CFileIO(modfile).Exists() ) { m_iError = MDERR_FILENOTFOUND; return false; }

	CyString addonDir = "";

	int addonSize = addonDir.Length() + 1;

	// try and open the mod file

	CCatFile cat;

	if ( cat.Open(modfile, addonDir, CATREAD_DAT, false) != CATERR_NONE ) { m_iError = MDERR_CANTOPENMOD; return false; }

	// we'll need to read in all the types/text files

	for ( int i = 0; i < cat.GetNumFiles(); i++ )

	{

		SInCatFile *f = cat.GetFile(i);

		CyString checkFile = f->sFile.FindReplace("\\", "/");

		if ( (checkFile.Left(6).Compare("types/") || checkFile.Left(2).Compare("t/") || checkFile.Left(6 + addonSize).Compare(addonDir + "/types/") || checkFile.Left(2 + addonSize).Compare(addonDir + "/t/")) && ValidFile(checkFile) )

		{

			// extract the file to the temp dir

			CyString toFile = CFileIO(m_sTempDir + "/" + CFileIO(f->sFile).GetFilename()).GetFullFilename();

			if ( cat.ExtractFile(f, toFile ) )

			{

				// now extract the matching file from the game dir

				if ( m_fileSystem.ExtractGameFile(f->sFile.ToString(), (toFile + ".compare").ToString()) )

				{

					DiffFile(toFile + ".compare", toFile, f->sFile);

					CFileIO(toFile + ".compare").Remove();

				}

				// make sure we clear up afterwards

				CFileIO(toFile).Remove();

			}

		}

	}

	return true;

}

bool CModDiff::DiffFile(CyString &baseFile, CyString &modFile, CyString &fileType)

{

	int type = 0;

	SDiffFile *diffFile = new SDiffFile;

	diffFile->sFile = fileType;

	// read both files and compare them

	CFileIO Base(baseFile);

	CyStringList *baseLines = Base.ReadLinesStr();

	if ( baseLines )

	{

		CFileIO Mod(modFile);

		CyStringList *lines = Mod.ReadLinesStr();

		if ( lines )

		{

			int id = -1;

			SStringList *node[2];

			node[0] = baseLines->Head();

			node[1] = lines->Head();

			CyString prev[2];

			while ( node[0] || node[1] )

			{

				CyString str[2];

				for ( int i = 0; i < 2; i++ )

				{

					while (node[i])

					{

						CyString l = node[i]->str;

						node[i] = node[i]->next;

						l.RemoveFirstSpace();

						l.RemoveChar('\r');

						if ( !l.Empty() && l.Left(1) != "/") 

						{

							str[i] += l;

							if ( IsLineComplete(str[i], fileType, (id == -1) ? true : false) ) 

								break;

						}

					}

				}

				if ( id == -1 )

					id = 0;

				else

				{

					// first check for mismatch amount, one of the nodes will be empty

					if ( str[0].Empty() && !str[1].Empty() ) // mod file has more entries (these must be additions)

					{

						SDiffEntryAddition *entry = new SDiffEntryAddition;

						entry->iID = id;

						entry->sEntry = str[1];

						diffFile->m_lEntries.push_back(entry);

					}

					else if ( str[1].Empty() && !str[0].Empty() ) // mod file has less entries (must have removed some)

					{

						SDiffEntry *entry = new SDiffEntryRemoval;

						entry->iID = id;

						diffFile->m_lEntries.push_back(entry);

					}

					else // we have a line for both, we need to compare them

					{

						// we migth have multiple entries to add when changed

						if ( str[0].Empty() || str[1].Empty() ) continue;

						CompareLine(str[0], str[1], type, id, diffFile);						

					}

					++id;

				}

			}

			delete lines;

		}

		delete baseLines;

	}

	if ( diffFile->m_lEntries.empty() )

		delete diffFile;

	else

		m_lFiles.push_back(diffFile);

	return true;

}

int CModDiff::GetAmountPosition(const CyString &fileType)

{

	return 2;

}

bool CModDiff::IsLineComplete(CyString &line, CyString &fileType, bool first)

{

	if ( first )

	{

		if ( line.NumToken(";") > GetAmountPosition(fileType) ) return true;

		return false;

	}

	return true;

}

void CModDiff::CompareLine(CyString &line1, CyString &line2, int type, int id, SDiffFile *diffFile)

{

	int max1, max2;

	CyString *str1 = line1.SplitToken(";", &max1);

	CyString *str2 = line2.SplitToken(";", &max2);

	if ( !str1 || !str2 ) return;

	int max = ((max1 > max2) ? max2 : max1);

	for ( int i = 0; i < max; i++ )

	{

		if ( str1[i] == str2[i] ) continue;

		if ( str1[i].Compare(str2[i]) ) continue;

		if ( str1[i].Empty() && str2[i].Empty() ) continue;

		if ( str1[i].Length() && str1[i][0] == '\0' && str2[i].Length() && str2[i][0] == '\0' ) continue;

		SDiffEntryChange *diff = new SDiffEntryChange;

		diff->iID = id;

		diff->iPos = i;

		diff->sEntry = str2[i];

		diff->sFrom = str1[i];

		diffFile->m_lEntries.push_back(diff);

	}

}

void CModDiff::Clean()

{

	for ( CListNode<SDiffFile> *node = m_lFiles.Front(); node; node = node->next() )

	{

		node->Data()->m_lEntries.clear();

		node->DeleteData();

	}

	m_lFiles.clear();

}

bool CModDiff::WriteDiff(CyString &file)

{

	if ( m_lFiles.empty() ) return false;

	CyStringList lines;

	for ( CListNode<SDiffFile> *node = m_lFiles.Front(); node; node = node->next() )

	{

		lines.PushBack(CyString("$$") + node->Data()->sFile);

		for ( CListNode<SDiffEntry> *node2 = node->Data()->m_lEntries.Front(); node2; node2 = node2->next() )

		{

			switch(node2->Data()->iType)

			{

				case DIFFTYPE_ADDITION:

					lines.PushBack(CyString("+++:") + (long)node2->Data()->iID + ":" + ((SDiffEntryAddition *)node2->Data())->sEntry);

					break;

				case DIFFTYPE_REMOVAL:

					lines.PushBack(CyString("---:") + (long)node2->Data()->iID);

					break;

				case DIFFTYPE_CHANGE:

					lines.PushBack(CyString("///:") + (long)node2->Data()->iID + ":" + (long)((SDiffEntryChange *)node2->Data())->iPos + ":" + ((SDiffEntryChange *)node2->Data())->sEntry);

					break;

			}

		}

	}

	CFileIO File(file);

	return File.WriteFile(&lines);

}

bool CModDiff::ReadDiff(CyString &file)

{

	Clean();

	CFileIO File(file);

	if ( !File.Exists() ) return false;

	CyStringList *lines = File.ReadLinesStr();

	if ( lines )

	{

		SDiffFile *diffFile = NULL;

		for ( SStringList *str = lines->Head(); str; str = str->next )

		{

			if ( str->str.Left(2).Compare("$$") )

			{

				diffFile = new SDiffFile;

				m_lFiles.push_back(diffFile);

				diffFile->sFile = str->str.Right(-2);

			}

			else if ( diffFile )

			{

				if ( str->str.Left(4).Compare("+++:") )

				{

					SDiffEntryAddition *addition = new SDiffEntryAddition;

					addition->iID = str->str.GetToken(":", 2, 2).ToInt();

					addition->sEntry = str->str.GetToken(":", 3);

					diffFile->m_lEntries.push_back(addition);

				}

				else if ( str->str.Left(4).Compare("---:") )

				{

					SDiffEntryRemoval *entry = new SDiffEntryRemoval;

					entry->iID = str->str.GetToken(":", 2, 2).ToInt();

					diffFile->m_lEntries.push_back(entry);

				}

				else if ( str->str.Left(4).Compare("///:") )

				{

					SDiffEntryChange *entry = new SDiffEntryChange;

					entry->iID = str->str.GetToken(":", 2, 2).ToInt();

					entry->iPos = str->str.GetToken(":", 3, 3).ToInt();

					entry->sEntry = str->str.GetToken(":", 4);

					diffFile->m_lEntries.push_back(entry);

				}

			}

		}

		delete lines;

		return true;

	}

	return false;

}

bool CModDiff::ApplyMod(CyString &mod)

{

	return m_fileSystem.addMod(mod.ToString());

}

bool CModDiff::ApplyDiff(CyString &mod)

{

	if ( m_lFiles.empty() ) return false;

	bool ret = false;

	CyString addonDir = "";

	CCatFile cat;

	if ( !CCatFile::Opened(cat.Open(mod, addonDir, CATREAD_DAT, true)) )

		return false;

	for ( CListNode<SDiffFile> *node = m_lFiles.Front(); node; node = node->next() )

	{

		// extract the file from the game

		SDiffFile *f = node->Data();

		CyStringList writeLines;

		int id;

		if ( ReadGameFile(f->sFile, &writeLines, &id) )

		{

			// now apply the diff

			for ( CListNode<SDiffEntry> *eNode = f->m_lEntries.Front(); eNode; eNode = eNode->next() )

			{

				switch ( eNode->Data()->iType )

				{

					case DIFFTYPE_ADDITION:

						writeLines.PushBack(((SDiffEntryAddition *)eNode->Data())->sEntry);

						break;

					case DIFFTYPE_REMOVAL:

						writeLines.GetAt(eNode->Data()->iID)->remove = true;

						break;

					case DIFFTYPE_CHANGE:

						{

							SStringList *strAt = writeLines.GetAt(eNode->Data()->iID);

							if ( strAt )

								strAt->str.RepToken(";", ((SDiffEntryChange *)eNode->Data())->iPos, ((SDiffEntryChange *)eNode->Data())->sEntry);

						}

						break;

				}

			}

			// add our comments and info

			writeLines.PushFront(CyString((long)id) + ";" + (long)writeLines.Count() + ";");

			writeLines.PushFront(CyString("// Generated by ModDiff (SPK Version: ") + CyString::CreateFromFloat(GetLibraryVersion(), 2) + ")");

			// now write the file

			CFileIO WriteFile(m_sTempDir + "/" + CFileIO(f->sFile).GetFilename());

			if ( WriteFile.WriteFile(&writeLines) )

			{

				if ( cat.AppendFile(m_sTempDir + "/" + CFileIO(f->sFile).GetFilename(), f->sFile) )

				{

					ret = true;

				}

			}

		}

	}

	if ( ret )

		cat.WriteCatFile();

	return ret;

}

bool CModDiff::ReadGameFile(CyString &file, CyStringList *writeLines, int *id)

{

	bool ret = false;

	if ( m_fileSystem.ExtractGameFile(file.ToString(), (m_sTempDir + "/" + CFileIO(file).GetFilename()).ToString()) )

	{

		CFileIO File(m_sTempDir + "/" + CFileIO(file).GetFilename());

		CyStringList *lines = File.ReadLinesStr();

		if ( lines )

		{

			int entries = -1;

			for ( SStringList *str = lines->Head(); str; str = str->next )

			{

				CyString l = str->str;

				l.RemoveFirstSpace();

				if ( l.Empty() ) continue;

				if ( l.Left(1) == "/" ) continue;

				if ( entries == -1 )

				{

					entries = l.GetToken(":", 2, 2).ToInt();

					if ( id )

						(*id) = l.GetToken(":", 1, 1).ToInt();

				}

				else

					writeLines->PushBack(l);

			}

			delete lines;

			ret = true;

		}

		File.Remove();

	}

	return ret;

}

bool CModDiff::ValidFile(CyString &file)

{

	return CModDiff::CanBeDiffed(file);

}

bool CModDiff::CanBeDiffed(const CyString &file)

{

	CyString checkFile = file;

	checkFile = CFileIO(file).GetDir() + "/" + CFileIO(file).GetBaseName();

	// all t files are the same format

	if ( checkFile.Left(7).Compare("types/T") )

		return true;

	return false;

}