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Showing content from http://www.ncbi.nlm.nih.gov/IEB/ToolBox/CPP_DOC/doxyhtml/lds2__handlers_8cpp_source.html below:

NCBI C++ ToolKit: src/objtools/lds2/lds2_handlers.cpp Source File

.format = GetFileFormat(

);

shared_ptr<CNcbiIstream>

.Exists() ?

.GetLength() : -1;

LDS2_MAX_CACHED_STREAMS);

max_streams = TMaxCachedStreams::GetDefault();

(max_streams == 0) {

unique_ptr<CNcbiIfstream> fin(

(file_info.

.c_str(), ios::binary));

(!fin->is_open()) {

shared_ptr<CNcbiIstream>(fin.release());

TStreamCache::iterator found = cache.end();

(it->first == file_info.

) {

(found != cache.end()) {

cache.emplace_front(

);

unique_ptr<CNcbiIfstream> fin(

(file_info.

.c_str(), ios::binary));

(!fin->is_open()) {

.second.reset(fin.release());

(!cache.empty() && cache.size() >= max_streams) {

cache.emplace_front(

);

: m_FileInfo(file_info),

unique_ptr<CNcbiIfstream>

(

( !

->is_open() ) {

shared_ptr<CNcbiIstream>

( db->

(file_info, chunk, stream_pos) ) {

unique_ptr<CCompressionIStream> zin(

shared_ptr<CNcbiIstream>(zin.release());

Checksum and hash calculation classes.

CChecksum – Checksum calculator.

EFormat

The formats are checked in the same order as declared here.

@ eUnknown

unknown format

static EFormat Format(const string &path, EOnError onerror=eDefault)

Guess file format.

const SLDS2_File & m_FileInfo

CGZipChunkHandler(const SLDS2_File &file_info, CLDS2_Database &db)

virtual ~CGZipChunkHandler(void)

virtual EAction OnChunk(TPosition raw_pos, TPosition data_pos)

Callback method, to be implemented by the end user.

void AddChunk(const SLDS2_File &file_info, const SLDS2_Chunk &chunk_info)

Store the chunk info in the database.

bool FindChunk(const SLDS2_File &file_info, SLDS2_Chunk &chunk_info, Int8 stream_pos)

Load chunk containing the required stream position.

Base class for URL handler.

virtual SLDS2_File::TFormat GetFileFormat(const SLDS2_File &file_info)

Methods for getting file information.

virtual shared_ptr< CNcbiIstream > OpenStream(const SLDS2_File &, Int8, CLDS2_Database *)=0

Open input stream for the URL at the specified position.

void SetHandlerName(const string &new_name)

Allow to change handler name by derived classes.

pair< string, TStream > TNamedStream

shared_ptr< CNcbiIstream > OpenStream(const SLDS2_File &file_info, Int8 stream_pos, CLDS2_Database *db) override

Open input stream for the URL at the specified position.

static const string s_GetHandlerName(void)

shared_ptr< CNcbiIstream > OpenOrGetStream(const SLDS2_File &file_info)

Int8 GetFileTime(const SLDS2_File &file_info) override

Get file timestamp - returns 0 by default.

Int8 GetFileSize(const SLDS2_File &file_info) override

Get file size - returns 0 by default.

CLDS2_UrlHandler_File(void)

deque< TNamedStream > TStreamCache

TStreamCache & x_GetStreamCache(void)

CRef< CTls< TStreamCache > > m_StreamCache

Uint4 GetFileCRC(const SLDS2_File &file_info) override

Get file CRC - returns 0 by default.

shared_ptr< CNcbiIstream > OpenStream(const SLDS2_File &file_info, Int8 stream_pos, CLDS2_Database *db) override

Open input stream for the URL at the specified position.

static const string s_GetHandlerName(void)

void SaveChunks(const SLDS2_File &file_info, CLDS2_Database &db) override

Save information about chunks for the URL in the database.

CLDS2_UrlHandler_GZipFile(void)

Create GZip file handler.

CZipStreamDecompressor – zlib based decompression stream processor.

Interface class to scan data source for seekable data chunks.

static const char * str(char *buf, int n)

#define NON_CONST_ITERATE(Type, Var, Cont)

Non constant version of ITERATE macro.

void AddFile(const string &file_path)

Update checksum with the file data.

Uint4 GetChecksum(void) const

Return calculated checksum.

@ fOwnReader

Delete the reader.

void g_GZip_ScanForChunks(CNcbiIstream &is, IChunkHandler &handler)

Get list of positions of separate gzip files in the concatenated gzip file.

Uint8 TPosition

Type to store stream positions.

@ eAction_Continue

Continue scanning to the next data chunk, if any.

@ fGZip

Set of flags for gzip file support. See each flag description above.

long mtime_nsec

Nanoseconds for modification time.

@ eParam_NoThread

Do not use per-thread values.

uint32_t Uint4

4-byte (32-bit) unsigned integer

int64_t Int8

8-byte (64-bit) signed integer

#define END_NCBI_SCOPE

End previously defined NCBI scope.

#define END_SCOPE(ns)

End the previously defined scope.

#define BEGIN_NCBI_SCOPE

Define ncbi namespace.

#define BEGIN_SCOPE(ns)

Define a new scope.

IO_PREFIX::ifstream CNcbiIfstream

Portable alias for ifstream.

NCBI_NS_STD::char_traits< char >::pos_type NcbiInt8ToStreampos(Int8 pos)

Convert plain numeric stream position (offset) into stream position usable with STL stream library.

void SetValue(TValue *value, FCleanup cleanup=0, void *cleanup_data=0, ENativeThreadCleanup native=eSkipCleanup)

Set value.

TValue * GetValue(void) const

Get the pointer previously stored by SetValue().

typedef NCBI_PARAM_TYPE(LDS2, MAX_CACHED_STREAMS) TMaxCachedStreams

NCBI_PARAM_DECL(size_t, LDS2, MAX_CACHED_STREAMS)

NCBI_PARAM_DEF_EX(size_t, LDS2, MAX_CACHED_STREAMS, 3, eParam_NoThread, LDS2_MAX_CACHED_STREAMS)

Defines classes: CDirEntry, CFile, CDir, CSymLink, CMemoryFile, CFileUtil, CFileLock,...

std::istream & in(std::istream &in_, double &x_)

Alternate stat structure for use instead of the standard struct stat.

Int8 stream_pos

Chunk position in the processed (e.g. unzipped) stream.

Int8 raw_pos

Chunk position in the raw file.

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