l_qfiles.c

quakeIII源码这个不用我多说吧

		idpackfiles = (dpackfile_t *) malloc(numpackdirs * sizeof(dpackfile_t));
		if (!idpackfiles) Error("out of memory");
		//read the dir entry
		if (fread(idpackfiles, sizeof(dpackfile_t), numpackdirs, fp) != numpackdirs)
		{
			fclose(fp);
			free(idpackfiles);
			Warning("can't read the Quake pak file dir entries from %s", pakfile);
			return NULL;
		} //end if
		fclose(fp);
		//convert to sin pack files
		packfiles = (dsinpackfile_t *) malloc(numpackdirs * sizeof(dsinpackfile_t));
		if (!packfiles) Error("out of memory");
		for (i = 0; i < numpackdirs; i++)
		{
			strcpy(packfiles[i].name, idpackfiles[i].name);
			packfiles[i].filepos = LittleLong(idpackfiles[i].filepos);
			packfiles[i].filelen = LittleLong(idpackfiles[i].filelen);
		} //end for
		free(idpackfiles);
	} //end if
	else //its a Sin pack file
	{
		//number of dir entries in the pak file
		numpackdirs = LittleLong(packheader.dirlen) / sizeof(dsinpackfile_t);
		packfiles = (dsinpackfile_t *) malloc(numpackdirs * sizeof(dsinpackfile_t));
		if (!packfiles) Error("out of memory");
		//read the dir entry
		if (fread(packfiles, sizeof(dsinpackfile_t), numpackdirs, fp) != numpackdirs)
		{
			fclose(fp);
			free(packfiles);
			Warning("can't read the Sin pak file dir entries from %s", pakfile);
			return NULL;
		} //end if
		fclose(fp);
		for (i = 0; i < numpackdirs; i++)
		{
			packfiles[i].filepos = LittleLong(packfiles[i].filepos);
			packfiles[i].filelen = LittleLong(packfiles[i].filelen);
		} //end for
	} //end else
	//
	for (i = 0; i < numpackdirs; i++)
	{
		ConvertPath(packfiles[i].name);
		if (FileFilter(filter, packfiles[i].name, false))
		{
			qf = malloc(sizeof(quakefile_t));
			if (!qf) Error("out of memory");
			memset(qf, 0, sizeof(quakefile_t));
			strcpy(qf->pakfile, pakfile);
			strcpy(qf->filename, pakfile);
			strcpy(qf->origname, packfiles[i].name);
			qf->zipfile = false;
			qf->offset = packfiles[i].filepos;
			qf->length = packfiles[i].filelen;
			qf->type = QuakeFileType(packfiles[i].name);
			//add the file ot the list
			qf->next = NULL;
			if (lastqf) lastqf->next = qf;
			else qfiles = qf;
			lastqf = qf;
		} //end if
	} //end for
	free(packfiles);
	return qfiles;
} //end of the function FindQuakeFilesInPak
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
quakefile_t *FindQuakeFilesWithPakFilter(char *pakfilter, char *filter)
{
#if defined(WIN32)|defined(_WIN32)
	WIN32_FIND_DATA filedata;
	HWND handle;
	struct _stat statbuf;
#else
	glob_t globbuf;
	struct stat statbuf;
	int j;
#endif
	quakefile_t *qfiles, *lastqf, *qf;
	char pakfile[_MAX_PATH], filename[_MAX_PATH], *str;
	int done;

	qfiles = NULL;
	lastqf = NULL;
	if (pakfilter && strlen(pakfilter))
	{
#if defined(WIN32)|defined(_WIN32)
		handle = FindFirstFile(pakfilter, &filedata);
		done = (handle == INVALID_HANDLE_VALUE);
		while(!done)
		{
			_splitpath(pakfilter, pakfile, NULL, NULL, NULL);
			_splitpath(pakfilter, NULL, &pakfile[strlen(pakfile)], NULL, NULL);
			AppendPathSeperator(pakfile, _MAX_PATH);
			strcat(pakfile, filedata.cFileName);
			_stat(pakfile, &statbuf);
#else
		glob(pakfilter, 0, NULL, &globbuf);
		for (j = 0; j < globbuf.gl_pathc; j++)
		{
			strcpy(pakfile, globbuf.gl_pathv[j]);
			stat(pakfile, &statbuf);
#endif
			//if the file with .pak or .pk3 is a folder
			if (statbuf.st_mode & S_IFDIR)
			{
				strcpy(filename, pakfilter);
				AppendPathSeperator(filename, _MAX_PATH);
				strcat(filename, filter);
				qf = FindQuakeFilesWithPakFilter(NULL, filename);
				if (lastqf) lastqf->next = qf;
				else qfiles = qf;
				lastqf = qf;
				while(lastqf->next) lastqf = lastqf->next;
			} //end if
			else
			{
#if defined(WIN32)|defined(_WIN32)
				str = StringContains(pakfile, ".pk3", false);
#else
				str = StringContains(pakfile, ".pk3", true);
#endif
				if (str && str == pakfile + strlen(pakfile) - strlen(".pk3"))
				{
					qf = FindQuakeFilesInZip(pakfile, filter);
				} //end if
				else
				{
					qf = FindQuakeFilesInPak(pakfile, filter);
				} //end else
				//
				if (qf)
				{
					if (lastqf) lastqf->next = qf;
					else qfiles = qf;
					lastqf = qf;
					while(lastqf->next) lastqf = lastqf->next;
				} //end if
			} //end else
			//
#if defined(WIN32)|defined(_WIN32)
			//find the next file
			done = !FindNextFile(handle, &filedata);
		} //end while
#else
		} //end for
		globfree(&globbuf);
#endif
	} //end if
	else
	{
#if defined(WIN32)|defined(_WIN32)
		handle = FindFirstFile(filter, &filedata);
		done = (handle == INVALID_HANDLE_VALUE);
		while(!done)
		{
			_splitpath(filter, filename, NULL, NULL, NULL);
			_splitpath(filter, NULL, &filename[strlen(filename)], NULL, NULL);
			AppendPathSeperator(filename, _MAX_PATH);
			strcat(filename, filedata.cFileName);
#else
		glob(filter, 0, NULL, &globbuf);
		for (j = 0; j < globbuf.gl_pathc; j++)
		{
			strcpy(filename, globbuf.gl_pathv[j]);
#endif
			//
			qf = malloc(sizeof(quakefile_t));
			if (!qf) Error("out of memory");
			memset(qf, 0, sizeof(quakefile_t));
			strcpy(qf->pakfile, "");
			strcpy(qf->filename, filename);
			strcpy(qf->origname, filename);
			qf->offset = 0;
			qf->length = 0;
			qf->type = QuakeFileType(filename);
			//add the file ot the list
			qf->next = NULL;
			if (lastqf) lastqf->next = qf;
			else qfiles = qf;
			lastqf = qf;
#if defined(WIN32)|defined(_WIN32)
			//find the next file
			done = !FindNextFile(handle, &filedata);
		} //end while
#else
		} //end for
		globfree(&globbuf);
#endif
	} //end else
	return qfiles;
} //end of the function FindQuakeFilesWithPakFilter
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
quakefile_t *FindQuakeFiles(char *filter)
{
	char *str;
	char newfilter[_MAX_PATH];
	char pakfilter[_MAX_PATH];
	char filefilter[_MAX_PATH];

	strcpy(newfilter, filter);
	ConvertPath(newfilter);
	strcpy(pakfilter, newfilter);

	str = StringContains(pakfilter, ".pak", false);
	if (!str) str = StringContains(pakfilter, ".pk3", false);

	if (str)
	{
		str += strlen(".pak");
		if (*str)
		{
			*str++ = '\0';
			while(*str == '\\' || *str == '/') str++;
			strcpy(filefilter, str);
			return FindQuakeFilesWithPakFilter(pakfilter, filefilter);
		} //end if
	} //end else
	return FindQuakeFilesWithPakFilter(NULL, newfilter);
} //end of the function FindQuakeFiles
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int LoadQuakeFile(quakefile_t *qf, void **bufferptr)
{
	FILE *fp;
	void *buffer;
	int length;
	unzFile zf;

	if (qf->zipfile)
	{
		//open the zip file
		zf = unzOpen(qf->pakfile);
		//set the file pointer
		qf->zipinfo.file = ((unz_s *) zf)->file;
		//open the Quake file in the zip file
		unzOpenCurrentFile(&qf->zipinfo);
		//allocate memory for the buffer
		length = qf->length;
		buffer = GetMemory(length+1);
		//read the Quake file from the zip file
		length = unzReadCurrentFile(&qf->zipinfo, buffer, length);
		//close the Quake file in the zip file
		unzCloseCurrentFile(&qf->zipinfo);
		//close the zip file
		unzClose(zf);

		*bufferptr = buffer;
		return length;
	} //end if
	else
	{
		fp = SafeOpenRead(qf->filename);
		if (qf->offset) fseek(fp, qf->offset, SEEK_SET);
		length = qf->length;
		if (!length) length = Q_filelength(fp);
		buffer = GetMemory(length+1);
		((char *)buffer)[length] = 0;
		SafeRead(fp, buffer, length);
		fclose(fp);

		*bufferptr = buffer;
		return length;
	} //end else
} //end of the function LoadQuakeFile
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int ReadQuakeFile(quakefile_t *qf, void *buffer, int offset, int length)
{
	FILE *fp;
	int read;
	unzFile zf;
	char tmpbuf[1024];

	if (qf->zipfile)
	{
		//open the zip file
		zf = unzOpen(qf->pakfile);
		//set the file pointer
		qf->zipinfo.file = ((unz_s *) zf)->file;
		//open the Quake file in the zip file
		unzOpenCurrentFile(&qf->zipinfo);
		//
		while(offset > 0)
		{
			read = offset;
			if (read > sizeof(tmpbuf)) read = sizeof(tmpbuf);
			unzReadCurrentFile(&qf->zipinfo, tmpbuf, read);
			offset -= read;
		} //end while
		//read the Quake file from the zip file
		length = unzReadCurrentFile(&qf->zipinfo, buffer, length);
		//close the Quake file in the zip file
		unzCloseCurrentFile(&qf->zipinfo);
		//close the zip file
		unzClose(zf);

		return length;
	} //end if
	else
	{
		fp = SafeOpenRead(qf->filename);
		if (qf->offset) fseek(fp, qf->offset, SEEK_SET);
		if (offset) fseek(fp, offset, SEEK_CUR);
		SafeRead(fp, buffer, length);
		fclose(fp);

		return length;
	} //end else
} //end of the function ReadQuakeFile