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"""Functions that read and write gzipped files.

The user of the file doesn't have to worry about the compression,
but random access is not allowed."""

# based on Andrew Kuchling's minigzip.py distributed with the zlib module

import struct, sys, time, os
import zlib
import builtins
import io

__all__ = ["GzipFile", "open", "compress", "decompress"]

FTEXT, FHCRC, FEXTRA, FNAME, FCOMMENT = 1, 2, 4, 8, 16

READ, WRITE = 1, 2

def open(filename, mode="rb", compresslevel=9,
         encoding=None, errors=None, newline=None):
    """Open a gzip-compressed file in binary or text mode.

    The filename argument can be an actual filename (a str or bytes object), or
    an existing file object to read from or write to.

    The mode argument can be "r", "rb", "w", "wb", "x", "xb", "a" or "ab" for
    binary mode, or "rt", "wt", "xt" or "at" for text mode. The default mode is
    "rb", and the default compresslevel is 9.

    For binary mode, this function is equivalent to the GzipFile constructor:
    GzipFile(filename, mode, compresslevel). In this case, the encoding, errors
    and newline arguments must not be provided.

    For text mode, a GzipFile object is created, and wrapped in an
    io.TextIOWrapper instance with the specified encoding, error handling
    behavior, and line ending(s).

    """
    if "t" in mode:
        if "b" in mode:
            raise ValueError("Invalid mode: %r" % (mode,))
    else:
        if encoding is not None:
            raise ValueError("Argument 'encoding' not supported in binary mode")
        if errors is not None:
            raise ValueError("Argument 'errors' not supported in binary mode")
        if newline is not None:
            raise ValueError("Argument 'newline' not supported in binary mode")

    gz_mode = mode.replace("t", "")
    if isinstance(filename, (str, bytes)):
        binary_file = GzipFile(filename, gz_mode, compresslevel)
    elif hasattr(filename, "read") or hasattr(filename, "write"):
        binary_file = GzipFile(None, gz_mode, compresslevel, filename)
    else:
        raise TypeError("filename must be a str or bytes object, or a file")

    if "t" in mode:
        return io.TextIOWrapper(binary_file, encoding, errors, newline)
    else:
        return binary_file

def write32u(output, value):
    # The L format writes the bit pattern correctly whether signed
    # or unsigned.
    output.write(struct.pack("<L", value))

class _PaddedFile:
    """Minimal read-only file object that prepends a string to the contents
    of an actual file. Shouldn't be used outside of gzip.py, as it lacks
    essential functionality."""

    def __init__(self, f, prepend=b''):
        self._buffer = prepend
        self._length = len(prepend)
        self.file = f
        self._read = 0

    def read(self, size):
        if self._read is None:
            return self.file.read(size)
        if self._read + size <= self._length:
            read = self._read
            self._read += size
            return self._buffer[read:self._read]
        else:
            read = self._read
            self._read = None
            return self._buffer[read:] + \
                   self.file.read(size-self._length+read)

    def prepend(self, prepend=b'', readprevious=False):
        if self._read is None:
            self._buffer = prepend
        elif readprevious and len(prepend) <= self._read:
            self._read -= len(prepend)
            return
        else:
            self._buffer = self._buffer[self._read:] + prepend
        self._length = len(self._buffer)
        self._read = 0

    def unused(self):
        if self._read is None:
            return b''
        return self._buffer[self._read:]

    def seek(self, offset, whence=0):
        # This is only ever called with offset=whence=0
        if whence == 1 and self._read is not None:
            if 0 <= offset + self._read <= self._length:
                self._read += offset
                return
            else:
                offset += self._length - self._read
        self._read = None
        self._buffer = None
        return self.file.seek(offset, whence)

    def __getattr__(self, name):
        return getattr(self.file, name)

class GzipFile(io.BufferedIOBase):
    """The GzipFile class simulates most of the methods of a file object with
    the exception of the readinto() and truncate() methods.

    This class only supports opening files in binary mode. If you need to open a
    compressed file in text mode, use the gzip.open() function.

    """

    myfileobj = None
    max_read_chunk = 10 * 1024 * 1024   # 10Mb

    def __init__(self, filename=None, mode=None,
                 compresslevel=9, fileobj=None, mtime=None):
        """Constructor for the GzipFile class.

        At least one of fileobj and filename must be given a
        non-trivial value.

        The new class instance is based on fileobj, which can be a regular
        file, an io.BytesIO object, or any other object which simulates a file.
        It defaults to None, in which case filename is opened to provide
        a file object.

        When fileobj is not None, the filename argument is only used to be
        included in the gzip file header, which may includes the original
        filename of the uncompressed file.  It defaults to the filename of
        fileobj, if discernible; otherwise, it defaults to the empty string,
        and in this case the original filename is not included in the header.

        The mode argument can be any of 'r', 'rb', 'a', 'ab', 'w', 'wb', 'x', or
        'xb' depending on whether the file will be read or written.  The default
        is the mode of fileobj if discernible; otherwise, the default is 'rb'.
        A mode of 'r' is equivalent to one of 'rb', and similarly for 'w' and
        'wb', 'a' and 'ab', and 'x' and 'xb'.

        The compresslevel argument is an integer from 0 to 9 controlling the
        level of compression; 1 is fastest and produces the least compression,
        and 9 is slowest and produces the most compression. 0 is no compression
        at all. The default is 9.

        The mtime argument is an optional numeric timestamp to be written
        to the stream when compressing.  All gzip compressed streams
        are required to contain a timestamp.  If omitted or None, the
        current time is used.  This module ignores the timestamp when
        decompressing; however, some programs, such as gunzip, make use
        of it.  The format of the timestamp is the same as that of the
        return value of time.time() and of the st_mtime member of the
        object returned by os.stat().

        """

        if mode and ('t' in mode or 'U' in mode):
            raise ValueError("Invalid mode: {!r}".format(mode))
        if mode and 'b' not in mode:
            mode += 'b'
        if fileobj is None:
            fileobj = self.myfileobj = builtins.open(filename, mode or 'rb')
        if filename is None:
            filename = getattr(fileobj, 'name', '')
            if not isinstance(filename, (str, bytes)):
                filename = ''
        if mode is None:
            mode = getattr(fileobj, 'mode', 'rb')

        if mode.startswith('r'):
            self.mode = READ
            # Set flag indicating start of a new member
            self._new_member = True
            # Buffer data read from gzip file. extrastart is offset in
            # stream where buffer starts. extrasize is number of
            # bytes remaining in buffer from current stream position.
            self.extrabuf = b""
            self.extrasize = 0
            self.extrastart = 0
            self.name = filename
            # Starts small, scales exponentially
            self.min_readsize = 100
            fileobj = _PaddedFile(fileobj)

        elif mode.startswith(('w', 'a', 'x')):
            self.mode = WRITE
            self._init_write(filename)
            self.compress = zlib.compressobj(compresslevel,
                                             zlib.DEFLATED,
                                             -zlib.MAX_WBITS,
                                             zlib.DEF_MEM_LEVEL,
                                             0)
        else:
            raise ValueError("Invalid mode: {!r}".format(mode))

        self.fileobj = fileobj
        self.offset = 0
        self.mtime = mtime

        if self.mode == WRITE:
            self._write_gzip_header()

    @property
    def filename(self):
        import warnings
        warnings.warn("use the name attribute", DeprecationWarning, 2)
        if self.mode == WRITE and self.name[-3:] != ".gz":
            return self.name + ".gz"
        return self.name

    def __repr__(self):
        fileobj = self.fileobj
        if isinstance(fileobj, _PaddedFile):
            fileobj = fileobj.file
        s = repr(fileobj)
        return '<gzip ' + s[1:-1] + ' ' + hex(id(self)) + '>'

    def _check_closed(self):
        """Raises a ValueError if the underlying file object has been closed.

        """
        if self.closed:
            raise ValueError('I/O operation on closed file.')

    def _init_write(self, filename):
        self.name = filename
        self.crc = zlib.crc32(b"") & 0xffffffff
        self.size = 0
        self.writebuf = []
        self.bufsize = 0

    def _write_gzip_header(self):
        self.fileobj.write(b'\037\213')             # magic header
        self.fileobj.write(b'\010')                 # compression method
        try:
            # RFC 1952 requires the FNAME field to be Latin-1. Do not
            # include filenames that cannot be represented that way.
            fname = os.path.basename(self.name)
            if not isinstance(fname, bytes):
                fname = fname.encode('latin-1')
            if fname.endswith(b'.gz'):
                fname = fname[:-3]
        except UnicodeEncodeError:
            fname = b''
        flags = 0
        if fname:
            flags = FNAME
        self.fileobj.write(chr(flags).encode('latin-1'))
        mtime = self.mtime
        if mtime is None:
            mtime = time.time()
        write32u(self.fileobj, int(mtime))
        self.fileobj.write(b'\002')
        self.fileobj.write(b'\377')
        if fname:
            self.fileobj.write(fname + b'\000')

    def _init_read(self):
        self.crc = zlib.crc32(b"") & 0xffffffff
        self.size = 0

    def _read_exact(self, n):
        data = self.fileobj.read(n)
        while len(data) < n:
            b = self.fileobj.read(n - len(data))
            if not b:
                raise EOFError("Compressed file ended before the "
                               "end-of-stream marker was reached")
            data += b
        return data

    def _read_gzip_header(self):
        magic = self.fileobj.read(2)
        if magic == b'':
            return False

        if magic != b'\037\213':
            raise OSError('Not a gzipped file')

        method, flag, self.mtime = struct.unpack("<BBIxx", self._read_exact(8))
        if method != 8:
            raise OSError('Unknown compression method')

        if flag & FEXTRA:
            # Read & discard the extra field, if present
            extra_len, = struct.unpack("<H", self._read_exact(2))
            self._read_exact(extra_len)
        if flag & FNAME:
            # Read and discard a null-terminated string containing the filename
            while True:
                s = self.fileobj.read(1)
                if not s or s==b'\000':
                    break
        if flag & FCOMMENT:
            # Read and discard a null-terminated string containing a comment
            while True:
                s = self.fileobj.read(1)
                if not s or s==b'\000':
                    break
        if flag & FHCRC:
            self._read_exact(2)     # Read & discard the 16-bit header CRC

        unused = self.fileobj.unused()
        if unused:
            uncompress = self.decompress.decompress(unused)
            self._add_read_data(uncompress)
        return True

    def write(self,data):
        self._check_closed()
        if self.mode != WRITE:
            import errno
            raise OSError(errno.EBADF, "write() on read-only GzipFile object")

        if self.fileobj is None:
            raise ValueError("write() on closed GzipFile object")

        # Convert data type if called by io.BufferedWriter.
        if isinstance(data, memoryview):
            data = data.tobytes()

        if len(data) > 0:
            self.size = self.size + len(data)
            self.crc = zlib.crc32(data, self.crc) & 0xffffffff
            self.fileobj.write( self.compress.compress(data) )
            self.offset += len(data)

        return len(data)

    def read(self, size=-1):
        self._check_closed()
        if self.mode != READ:
            import errno
            raise OSError(errno.EBADF, "read() on write-only GzipFile object")

        if self.extrasize <= 0 and self.fileobj is None:
            return b''

        readsize = 1024
        if size < 0:        # get the whole thing
            while self._read(readsize):
                readsize = min(self.max_read_chunk, readsize * 2)
            size = self.extrasize
        else:               # just get some more of it
            while size > self.extrasize:
                if not self._read(readsize):
                    if size > self.extrasize:
                        size = self.extrasize
                    break
                readsize = min(self.max_read_chunk, readsize * 2)

        offset = self.offset - self.extrastart
        chunk = self.extrabuf[offset: offset + size]
        self.extrasize = self.extrasize - size

        self.offset += size
        return chunk

    def read1(self, size=-1):
        self._check_closed()
        if self.mode != READ:
            import errno
            raise OSError(errno.EBADF, "read1() on write-only GzipFile object")

        if self.extrasize <= 0 and self.fileobj is None:
            return b''

        # For certain input data, a single call to _read() may not return
        # any data. In this case, retry until we get some data or reach EOF.
        while self.extrasize <= 0 and self._read():
            pass
        if size < 0 or size > self.extrasize:
            size = self.extrasize

        offset = self.offset - self.extrastart
        chunk = self.extrabuf[offset: offset + size]
        self.extrasize -= size
        self.offset += size
        return chunk

    def peek(self, n):
        if self.mode != READ:
            import errno
            raise OSError(errno.EBADF, "peek() on write-only GzipFile object")

        # Do not return ridiculously small buffers, for one common idiom
        # is to call peek(1) and expect more bytes in return.
        if n < 100:
            n = 100
        if self.extrasize == 0:
            if self.fileobj is None:
                return b''
            # Ensure that we don't return b"" if we haven't reached EOF.
            # 1024 is the same buffering heuristic used in read()
            while self.extrasize == 0 and self._read(max(n, 1024)):
                pass
        offset = self.offset - self.extrastart
        remaining = self.extrasize
        assert remaining == len(self.extrabuf) - offset
        return self.extrabuf[offset:offset + n]

    def _unread(self, buf):
        self.extrasize = len(buf) + self.extrasize
        self.offset -= len(buf)

    def _read(self, size=1024):
        if self.fileobj is None:
            return False

        if self._new_member:
            # If the _new_member flag is set, we have to
            # jump to the next member, if there is one.
            self._init_read()
            if not self._read_gzip_header():
                return False
            self.decompress = zlib.decompressobj(-zlib.MAX_WBITS)
            self._new_member = False

        # Read a chunk of data from the file
        buf = self.fileobj.read(size)

        # If the EOF has been reached, flush the decompression object
        # and mark this object as finished.

        if buf == b"":
            uncompress = self.decompress.flush()
            # Prepend the already read bytes to the fileobj to they can be
            # seen by _read_eof()
            self.fileobj.prepend(self.decompress.unused_data, True)
            self._read_eof()
            self._add_read_data( uncompress )
            return False

        uncompress = self.decompress.decompress(buf)
        self._add_read_data( uncompress )

        if self.decompress.unused_data != b"":
            # Ending case: we've come to the end of a member in the file,
            # so seek back to the start of the unused data, finish up
            # this member, and read a new gzip header.
            # Prepend the already read bytes to the fileobj to they can be
            # seen by _read_eof() and _read_gzip_header()
            self.fileobj.prepend(self.decompress.unused_data, True)
            # Check the CRC and file size, and set the flag so we read
            # a new member on the next call
            self._read_eof()
            self._new_member = True
        return True

    def _add_read_data(self, data):
        self.crc = zlib.crc32(data, self.crc) & 0xffffffff
        offset = self.offset - self.extrastart
        self.extrabuf = self.extrabuf[offset:] + data
        self.extrasize = self.extrasize + len(data)
        self.extrastart = self.offset
        self.size = self.size + len(data)

    def _read_eof(self):
        # We've read to the end of the file
        # We check the that the computed CRC and size of the
        # uncompressed data matches the stored values.  Note that the size
        # stored is the true file size mod 2**32.
        crc32, isize = struct.unpack("<II", self._read_exact(8))
        if crc32 != self.crc:
            raise OSError("CRC check failed %s != %s" % (hex(crc32),
                                                         hex(self.crc)))
        elif isize != (self.size & 0xffffffff):
            raise OSError("Incorrect length of data produced")

        # Gzip files can be padded with zeroes and still have archives.
        # Consume all zero bytes and set the file position to the first
        # non-zero byte. See http://www.gzip.org/#faq8
        c = b"\x00"
        while c == b"\x00":
            c = self.fileobj.read(1)
        if c:
            self.fileobj.prepend(c, True)

    @property
    def closed(self):
        return self.fileobj is None

    def close(self):
        if self.fileobj is None:
            return
        if self.mode == WRITE:
            self.fileobj.write(self.compress.flush())
            write32u(self.fileobj, self.crc)
            # self.size may exceed 2GB, or even 4GB
            write32u(self.fileobj, self.size & 0xffffffff)
            self.fileobj = None
        elif self.mode == READ:
            self.fileobj = None
        if self.myfileobj:
            self.myfileobj.close()
            self.myfileobj = None

    def flush(self,zlib_mode=zlib.Z_SYNC_FLUSH):
        self._check_closed()
        if self.mode == WRITE:
            # Ensure the compressor's buffer is flushed
            self.fileobj.write(self.compress.flush(zlib_mode))
            self.fileobj.flush()

    def fileno(self):
        """Invoke the underlying file object's fileno() method.

        This will raise AttributeError if the underlying file object
        doesn't support fileno().
        """
        return self.fileobj.fileno()

    def rewind(self):
        '''Return the uncompressed stream file position indicator to the
        beginning of the file'''
        if self.mode != READ:
            raise OSError("Can't rewind in write mode")
        self.fileobj.seek(0)
        self._new_member = True
        self.extrabuf = b""
        self.extrasize = 0
        self.extrastart = 0
        self.offset = 0

    def readable(self):
        return self.mode == READ

    def writable(self):
        return self.mode == WRITE

    def seekable(self):
        return True

    def seek(self, offset, whence=0):
        if whence:
            if whence == 1:
                offset = self.offset + offset
            else:
                raise ValueError('Seek from end not supported')
        if self.mode == WRITE:
            if offset < self.offset:
                raise OSError('Negative seek in write mode')
            count = offset - self.offset
            chunk = bytes(1024)
            for i in range(count // 1024):
                self.write(chunk)
            self.write(bytes(count % 1024))
        elif self.mode == READ:
            if offset < self.offset:
                # for negative seek, rewind and do positive seek
                self.rewind()
            count = offset - self.offset
            for i in range(count // 1024):
                self.read(1024)
            self.read(count % 1024)

        return self.offset

    def readline(self, size=-1):
        if size < 0:
            # Shortcut common case - newline found in buffer.
            offset = self.offset - self.extrastart
            i = self.extrabuf.find(b'\n', offset) + 1
            if i > 0:
                self.extrasize -= i - offset
                self.offset += i - offset
                return self.extrabuf[offset: i]

            size = sys.maxsize
            readsize = self.min_readsize
        else:
            readsize = size
        bufs = []
        while size != 0:
            c = self.read(readsize)
            i = c.find(b'\n')

            # We set i=size to break out of the loop under two
            # conditions: 1) there's no newline, and the chunk is
            # larger than size, or 2) there is a newline, but the
            # resulting line would be longer than 'size'.
            if (size <= i) or (i == -1 and len(c) > size):
                i = size - 1

            if i >= 0 or c == b'':
                bufs.append(c[:i + 1])    # Add portion of last chunk
                self._unread(c[i + 1:])   # Push back rest of chunk
                break

            # Append chunk to list, decrease 'size',
            bufs.append(c)
            size = size - len(c)
            readsize = min(size, readsize * 2)
        if readsize > self.min_readsize:
            self.min_readsize = min(readsize, self.min_readsize * 2, 512)
        return b''.join(bufs) # Return resulting line

def compress(data, compresslevel=9):
    """Compress data in one shot and return the compressed string.
    Optional argument is the compression level, in range of 0-9.
    """
    buf = io.BytesIO()
    with GzipFile(fileobj=buf, mode='wb', compresslevel=compresslevel) as f:
        f.write(data)
    return buf.getvalue()

def decompress(data):
    """Decompress a gzip compressed string in one shot.
    Return the decompressed string.
    """
    with GzipFile(fileobj=io.BytesIO(data)) as f:
        return f.read()

def _test():
    # Act like gzip; with -d, act like gunzip.
    # The input file is not deleted, however, nor are any other gzip
    # options or features supported.
    args = sys.argv[1:]
    decompress = args and args[0] == "-d"
    if decompress:
        args = args[1:]
    if not args:
        args = ["-"]
    for arg in args:
        if decompress:
            if arg == "-":
                f = GzipFile(filename="", mode="rb", fileobj=sys.stdin.buffer)
                g = sys.stdout.buffer
            else:
                if arg[-3:] != ".gz":
                    print("filename doesn't end in .gz:", repr(arg))
                    continue
                f = open(arg, "rb")
                g = builtins.open(arg[:-3], "wb")
        else:
            if arg == "-":
                f = sys.stdin.buffer
                g = GzipFile(filename="", mode="wb", fileobj=sys.stdout.buffer)
            else:
                f = builtins.open(arg, "rb")
                g = open(arg + ".gz", "wb")
        while True:
            chunk = f.read(1024)
            if not chunk:
                break
            g.write(chunk)
        if g is not sys.stdout.buffer:
            g.close()
        if f is not sys.stdin.buffer:
            f.close()

if __name__ == '__main__':
    _test()
=======
"""Functions that read and write gzipped files.

The user of the file doesn't have to worry about the compression,
but random access is not allowed."""

# based on Andrew Kuchling's minigzip.py distributed with the zlib module

import struct, sys, time, os
import zlib
import builtins
import io

__all__ = ["GzipFile", "open", "compress", "decompress"]

FTEXT, FHCRC, FEXTRA, FNAME, FCOMMENT = 1, 2, 4, 8, 16

READ, WRITE = 1, 2

def open(filename, mode="rb", compresslevel=9,
         encoding=None, errors=None, newline=None):
    """Open a gzip-compressed file in binary or text mode.

    The filename argument can be an actual filename (a str or bytes object), or
    an existing file object to read from or write to.

    The mode argument can be "r", "rb", "w", "wb", "x", "xb", "a" or "ab" for
    binary mode, or "rt", "wt", "xt" or "at" for text mode. The default mode is
    "rb", and the default compresslevel is 9.

    For binary mode, this function is equivalent to the GzipFile constructor:
    GzipFile(filename, mode, compresslevel). In this case, the encoding, errors
    and newline arguments must not be provided.

    For text mode, a GzipFile object is created, and wrapped in an
    io.TextIOWrapper instance with the specified encoding, error handling
    behavior, and line ending(s).

    """
    if "t" in mode:
        if "b" in mode:
            raise ValueError("Invalid mode: %r" % (mode,))
    else:
        if encoding is not None:
            raise ValueError("Argument 'encoding' not supported in binary mode")
        if errors is not None:
            raise ValueError("Argument 'errors' not supported in binary mode")
        if newline is not None:
            raise ValueError("Argument 'newline' not supported in binary mode")

    gz_mode = mode.replace("t", "")
    if isinstance(filename, (str, bytes)):
        binary_file = GzipFile(filename, gz_mode, compresslevel)
    elif hasattr(filename, "read") or hasattr(filename, "write"):
        binary_file = GzipFile(None, gz_mode, compresslevel, filename)
    else:
        raise TypeError("filename must be a str or bytes object, or a file")

    if "t" in mode:
        return io.TextIOWrapper(binary_file, encoding, errors, newline)
    else:
        return binary_file

def write32u(output, value):
    # The L format writes the bit pattern correctly whether signed
    # or unsigned.
    output.write(struct.pack("<L", value))

class _PaddedFile:
    """Minimal read-only file object that prepends a string to the contents
    of an actual file. Shouldn't be used outside of gzip.py, as it lacks
    essential functionality."""

    def __init__(self, f, prepend=b''):
        self._buffer = prepend
        self._length = len(prepend)
        self.file = f
        self._read = 0

    def read(self, size):
        if self._read is None:
            return self.file.read(size)
        if self._read + size <= self._length:
            read = self._read
            self._read += size
            return self._buffer[read:self._read]
        else:
            read = self._read
            self._read = None
            return self._buffer[read:] + \
                   self.file.read(size-self._length+read)

    def prepend(self, prepend=b'', readprevious=False):
        if self._read is None:
            self._buffer = prepend
        elif readprevious and len(prepend) <= self._read:
            self._read -= len(prepend)
            return
        else:
            self._buffer = self._buffer[self._read:] + prepend
        self._length = len(self._buffer)
        self._read = 0

    def unused(self):
        if self._read is None:
            return b''
        return self._buffer[self._read:]

    def seek(self, offset, whence=0):
        # This is only ever called with offset=whence=0
        if whence == 1 and self._read is not None:
            if 0 <= offset + self._read <= self._length:
                self._read += offset
                return
            else:
                offset += self._length - self._read
        self._read = None
        self._buffer = None
        return self.file.seek(offset, whence)

    def __getattr__(self, name):
        return getattr(self.file, name)

class GzipFile(io.BufferedIOBase):
    """The GzipFile class simulates most of the methods of a file object with
    the exception of the readinto() and truncate() methods.

    This class only supports opening files in binary mode. If you need to open a
    compressed file in text mode, use the gzip.open() function.

    """

    myfileobj = None
    max_read_chunk = 10 * 1024 * 1024   # 10Mb

    def __init__(self, filename=None, mode=None,
                 compresslevel=9, fileobj=None, mtime=None):
        """Constructor for the GzipFile class.

        At least one of fileobj and filename must be given a
        non-trivial value.

        The new class instance is based on fileobj, which can be a regular
        file, an io.BytesIO object, or any other object which simulates a file.
        It defaults to None, in which case filename is opened to provide
        a file object.

        When fileobj is not None, the filename argument is only used to be
        included in the gzip file header, which may includes the original
        filename of the uncompressed file.  It defaults to the filename of
        fileobj, if discernible; otherwise, it defaults to the empty string,
        and in this case the original filename is not included in the header.

        The mode argument can be any of 'r', 'rb', 'a', 'ab', 'w', 'wb', 'x', or
        'xb' depending on whether the file will be read or written.  The default
        is the mode of fileobj if discernible; otherwise, the default is 'rb'.
        A mode of 'r' is equivalent to one of 'rb', and similarly for 'w' and
        'wb', 'a' and 'ab', and 'x' and 'xb'.

        The compresslevel argument is an integer from 0 to 9 controlling the
        level of compression; 1 is fastest and produces the least compression,
        and 9 is slowest and produces the most compression. 0 is no compression
        at all. The default is 9.

        The mtime argument is an optional numeric timestamp to be written
        to the stream when compressing.  All gzip compressed streams
        are required to contain a timestamp.  If omitted or None, the
        current time is used.  This module ignores the timestamp when
        decompressing; however, some programs, such as gunzip, make use
        of it.  The format of the timestamp is the same as that of the
        return value of time.time() and of the st_mtime member of the
        object returned by os.stat().

        """

        if mode and ('t' in mode or 'U' in mode):
            raise ValueError("Invalid mode: {!r}".format(mode))
        if mode and 'b' not in mode:
            mode += 'b'
        if fileobj is None:
            fileobj = self.myfileobj = builtins.open(filename, mode or 'rb')
        if filename is None:
            filename = getattr(fileobj, 'name', '')
            if not isinstance(filename, (str, bytes)):
                filename = ''
        if mode is None:
            mode = getattr(fileobj, 'mode', 'rb')

        if mode.startswith('r'):
            self.mode = READ
            # Set flag indicating start of a new member
            self._new_member = True
            # Buffer data read from gzip file. extrastart is offset in
            # stream where buffer starts. extrasize is number of
            # bytes remaining in buffer from current stream position.
            self.extrabuf = b""
            self.extrasize = 0
            self.extrastart = 0
            self.name = filename
            # Starts small, scales exponentially
            self.min_readsize = 100
            fileobj = _PaddedFile(fileobj)

        elif mode.startswith(('w', 'a', 'x')):
            self.mode = WRITE
            self._init_write(filename)
            self.compress = zlib.compressobj(compresslevel,
                                             zlib.DEFLATED,
                                             -zlib.MAX_WBITS,
                                             zlib.DEF_MEM_LEVEL,
                                             0)
        else:
            raise ValueError("Invalid mode: {!r}".format(mode))

        self.fileobj = fileobj
        self.offset = 0
        self.mtime = mtime

        if self.mode == WRITE:
            self._write_gzip_header()

    @property
    def filename(self):
        import warnings
        warnings.warn("use the name attribute", DeprecationWarning, 2)
        if self.mode == WRITE and self.name[-3:] != ".gz":
            return self.name + ".gz"
        return self.name

    def __repr__(self):
        fileobj = self.fileobj
        if isinstance(fileobj, _PaddedFile):
            fileobj = fileobj.file
        s = repr(fileobj)
        return '<gzip ' + s[1:-1] + ' ' + hex(id(self)) + '>'

    def _check_closed(self):
        """Raises a ValueError if the underlying file object has been closed.

        """
        if self.closed:
            raise ValueError('I/O operation on closed file.')

    def _init_write(self, filename):
        self.name = filename
        self.crc = zlib.crc32(b"") & 0xffffffff
        self.size = 0
        self.writebuf = []
        self.bufsize = 0

    def _write_gzip_header(self):
        self.fileobj.write(b'\037\213')             # magic header
        self.fileobj.write(b'\010')                 # compression method
        try:
            # RFC 1952 requires the FNAME field to be Latin-1. Do not
            # include filenames that cannot be represented that way.
            fname = os.path.basename(self.name)
            if not isinstance(fname, bytes):
                fname = fname.encode('latin-1')
            if fname.endswith(b'.gz'):
                fname = fname[:-3]
        except UnicodeEncodeError:
            fname = b''
        flags = 0
        if fname:
            flags = FNAME
        self.fileobj.write(chr(flags).encode('latin-1'))
        mtime = self.mtime
        if mtime is None:
            mtime = time.time()
        write32u(self.fileobj, int(mtime))
        self.fileobj.write(b'\002')
        self.fileobj.write(b'\377')
        if fname:
            self.fileobj.write(fname + b'\000')

    def _init_read(self):
        self.crc = zlib.crc32(b"") & 0xffffffff
        self.size = 0

    def _read_exact(self, n):
        data = self.fileobj.read(n)
        while len(data) < n:
            b = self.fileobj.read(n - len(data))
            if not b:
                raise EOFError("Compressed file ended before the "
                               "end-of-stream marker was reached")
            data += b
        return data

    def _read_gzip_header(self):
        magic = self.fileobj.read(2)
        if magic == b'':
            return False

        if magic != b'\037\213':
            raise OSError('Not a gzipped file')

        method, flag, self.mtime = struct.unpack("<BBIxx", self._read_exact(8))
        if method != 8:
            raise OSError('Unknown compression method')

        if flag & FEXTRA:
            # Read & discard the extra field, if present
            extra_len, = struct.unpack("<H", self._read_exact(2))
            self._read_exact(extra_len)
        if flag & FNAME:
            # Read and discard a null-terminated string containing the filename
            while True:
                s = self.fileobj.read(1)
                if not s or s==b'\000':
                    break
        if flag & FCOMMENT:
            # Read and discard a null-terminated string containing a comment
            while True:
                s = self.fileobj.read(1)
                if not s or s==b'\000':
                    break
        if flag & FHCRC:
            self._read_exact(2)     # Read & discard the 16-bit header CRC

        unused = self.fileobj.unused()
        if unused:
            uncompress = self.decompress.decompress(unused)
            self._add_read_data(uncompress)
        return True

    def write(self,data):
        self._check_closed()
        if self.mode != WRITE:
            import errno
            raise OSError(errno.EBADF, "write() on read-only GzipFile object")

        if self.fileobj is None:
            raise ValueError("write() on closed GzipFile object")

        # Convert data type if called by io.BufferedWriter.
        if isinstance(data, memoryview):
            data = data.tobytes()

        if len(data) > 0:
            self.size = self.size + len(data)
            self.crc = zlib.crc32(data, self.crc) & 0xffffffff
            self.fileobj.write( self.compress.compress(data) )
            self.offset += len(data)

        return len(data)

    def read(self, size=-1):
        self._check_closed()
        if self.mode != READ:
            import errno
            raise OSError(errno.EBADF, "read() on write-only GzipFile object")

        if self.extrasize <= 0 and self.fileobj is None:
            return b''

        readsize = 1024
        if size < 0:        # get the whole thing
            while self._read(readsize):
                readsize = min(self.max_read_chunk, readsize * 2)
            size = self.extrasize
        else:               # just get some more of it
            while size > self.extrasize:
                if not self._read(readsize):
                    if size > self.extrasize:
                        size = self.extrasize
                    break
                readsize = min(self.max_read_chunk, readsize * 2)

        offset = self.offset - self.extrastart
        chunk = self.extrabuf[offset: offset + size]
        self.extrasize = self.extrasize - size

        self.offset += size
        return chunk

    def read1(self, size=-1):
        self._check_closed()
        if self.mode != READ:
            import errno
            raise OSError(errno.EBADF, "read1() on write-only GzipFile object")

        if self.extrasize <= 0 and self.fileobj is None:
            return b''

        # For certain input data, a single call to _read() may not return
        # any data. In this case, retry until we get some data or reach EOF.
        while self.extrasize <= 0 and self._read():
            pass
        if size < 0 or size > self.extrasize:
            size = self.extrasize

        offset = self.offset - self.extrastart
        chunk = self.extrabuf[offset: offset + size]
        self.extrasize -= size
        self.offset += size
        return chunk

    def peek(self, n):
        if self.mode != READ:
            import errno
            raise OSError(errno.EBADF, "peek() on write-only GzipFile object")

        # Do not return ridiculously small buffers, for one common idiom
        # is to call peek(1) and expect more bytes in return.
        if n < 100:
            n = 100
        if self.extrasize == 0:
            if self.fileobj is None:
                return b''
            # Ensure that we don't return b"" if we haven't reached EOF.
            # 1024 is the same buffering heuristic used in read()
            while self.extrasize == 0 and self._read(max(n, 1024)):
                pass
        offset = self.offset - self.extrastart
        remaining = self.extrasize
        assert remaining == len(self.extrabuf) - offset
        return self.extrabuf[offset:offset + n]

    def _unread(self, buf):
        self.extrasize = len(buf) + self.extrasize
        self.offset -= len(buf)

    def _read(self, size=1024):
        if self.fileobj is None:
            return False

        if self._new_member:
            # If the _new_member flag is set, we have to
            # jump to the next member, if there is one.
            self._init_read()
            if not self._read_gzip_header():
                return False
            self.decompress = zlib.decompressobj(-zlib.MAX_WBITS)
            self._new_member = False

        # Read a chunk of data from the file
        buf = self.fileobj.read(size)

        # If the EOF has been reached, flush the decompression object
        # and mark this object as finished.

        if buf == b"":
            uncompress = self.decompress.flush()
            # Prepend the already read bytes to the fileobj to they can be
            # seen by _read_eof()
            self.fileobj.prepend(self.decompress.unused_data, True)
            self._read_eof()
            self._add_read_data( uncompress )
            return False

        uncompress = self.decompress.decompress(buf)
        self._add_read_data( uncompress )

        if self.decompress.unused_data != b"":
            # Ending case: we've come to the end of a member in the file,
            # so seek back to the start of the unused data, finish up
            # this member, and read a new gzip header.
            # Prepend the already read bytes to the fileobj to they can be
            # seen by _read_eof() and _read_gzip_header()
            self.fileobj.prepend(self.decompress.unused_data, True)
            # Check the CRC and file size, and set the flag so we read
            # a new member on the next call
            self._read_eof()
            self._new_member = True
        return True

    def _add_read_data(self, data):
        self.crc = zlib.crc32(data, self.crc) & 0xffffffff
        offset = self.offset - self.extrastart
        self.extrabuf = self.extrabuf[offset:] + data
        self.extrasize = self.extrasize + len(data)
        self.extrastart = self.offset
        self.size = self.size + len(data)

    def _read_eof(self):
        # We've read to the end of the file
        # We check the that the computed CRC and size of the
        # uncompressed data matches the stored values.  Note that the size
        # stored is the true file size mod 2**32.
        crc32, isize = struct.unpack("<II", self._read_exact(8))
        if crc32 != self.crc:
            raise OSError("CRC check failed %s != %s" % (hex(crc32),
                                                         hex(self.crc)))
        elif isize != (self.size & 0xffffffff):
            raise OSError("Incorrect length of data produced")

        # Gzip files can be padded with zeroes and still have archives.
        # Consume all zero bytes and set the file position to the first
        # non-zero byte. See http://www.gzip.org/#faq8
        c = b"\x00"
        while c == b"\x00":
            c = self.fileobj.read(1)
        if c:
            self.fileobj.prepend(c, True)

    @property
    def closed(self):
        return self.fileobj is None

    def close(self):
        if self.fileobj is None:
            return
        if self.mode == WRITE:
            self.fileobj.write(self.compress.flush())
            write32u(self.fileobj, self.crc)
            # self.size may exceed 2GB, or even 4GB
            write32u(self.fileobj, self.size & 0xffffffff)
            self.fileobj = None
        elif self.mode == READ:
            self.fileobj = None
        if self.myfileobj:
            self.myfileobj.close()
            self.myfileobj = None

    def flush(self,zlib_mode=zlib.Z_SYNC_FLUSH):
        self._check_closed()
        if self.mode == WRITE:
            # Ensure the compressor's buffer is flushed
            self.fileobj.write(self.compress.flush(zlib_mode))
            self.fileobj.flush()

    def fileno(self):
        """Invoke the underlying file object's fileno() method.

        This will raise AttributeError if the underlying file object
        doesn't support fileno().
        """
        return self.fileobj.fileno()

    def rewind(self):
        '''Return the uncompressed stream file position indicator to the
        beginning of the file'''
        if self.mode != READ:
            raise OSError("Can't rewind in write mode")
        self.fileobj.seek(0)
        self._new_member = True
        self.extrabuf = b""
        self.extrasize = 0
        self.extrastart = 0
        self.offset = 0

    def readable(self):
        return self.mode == READ

    def writable(self):
        return self.mode == WRITE

    def seekable(self):
        return True

    def seek(self, offset, whence=0):
        if whence:
            if whence == 1:
                offset = self.offset + offset
            else:
                raise ValueError('Seek from end not supported')
        if self.mode == WRITE:
            if offset < self.offset:
                raise OSError('Negative seek in write mode')
            count = offset - self.offset
            chunk = bytes(1024)
            for i in range(count // 1024):
                self.write(chunk)
            self.write(bytes(count % 1024))
        elif self.mode == READ:
            if offset < self.offset:
                # for negative seek, rewind and do positive seek
                self.rewind()
            count = offset - self.offset
            for i in range(count // 1024):
                self.read(1024)
            self.read(count % 1024)

        return self.offset

    def readline(self, size=-1):
        if size < 0:
            # Shortcut common case - newline found in buffer.
            offset = self.offset - self.extrastart
            i = self.extrabuf.find(b'\n', offset) + 1
            if i > 0:
                self.extrasize -= i - offset
                self.offset += i - offset
                return self.extrabuf[offset: i]

            size = sys.maxsize
            readsize = self.min_readsize
        else:
            readsize = size
        bufs = []
        while size != 0:
            c = self.read(readsize)
            i = c.find(b'\n')

            # We set i=size to break out of the loop under two
            # conditions: 1) there's no newline, and the chunk is
            # larger than size, or 2) there is a newline, but the
            # resulting line would be longer than 'size'.
            if (size <= i) or (i == -1 and len(c) > size):
                i = size - 1

            if i >= 0 or c == b'':
                bufs.append(c[:i + 1])    # Add portion of last chunk
                self._unread(c[i + 1:])   # Push back rest of chunk
                break

            # Append chunk to list, decrease 'size',
            bufs.append(c)
            size = size - len(c)
            readsize = min(size, readsize * 2)
        if readsize > self.min_readsize:
            self.min_readsize = min(readsize, self.min_readsize * 2, 512)
        return b''.join(bufs) # Return resulting line

def compress(data, compresslevel=9):
    """Compress data in one shot and return the compressed string.
    Optional argument is the compression level, in range of 0-9.
    """
    buf = io.BytesIO()
    with GzipFile(fileobj=buf, mode='wb', compresslevel=compresslevel) as f:
        f.write(data)
    return buf.getvalue()

def decompress(data):
    """Decompress a gzip compressed string in one shot.
    Return the decompressed string.
    """
    with GzipFile(fileobj=io.BytesIO(data)) as f:
        return f.read()

def _test():
    # Act like gzip; with -d, act like gunzip.
    # The input file is not deleted, however, nor are any other gzip
    # options or features supported.
    args = sys.argv[1:]
    decompress = args and args[0] == "-d"
    if decompress:
        args = args[1:]
    if not args:
        args = ["-"]
    for arg in args:
        if decompress:
            if arg == "-":
                f = GzipFile(filename="", mode="rb", fileobj=sys.stdin.buffer)
                g = sys.stdout.buffer
            else:
                if arg[-3:] != ".gz":
                    print("filename doesn't end in .gz:", repr(arg))
                    continue
                f = open(arg, "rb")
                g = builtins.open(arg[:-3], "wb")
        else:
            if arg == "-":
                f = sys.stdin.buffer
                g = GzipFile(filename="", mode="wb", fileobj=sys.stdout.buffer)
            else:
                f = builtins.open(arg, "rb")
                g = open(arg + ".gz", "wb")
        while True:
            chunk = f.read(1024)
            if not chunk:
                break
            g.write(chunk)
        if g is not sys.stdout.buffer:
            g.close()
        if f is not sys.stdin.buffer:
            f.close()

if __name__ == '__main__':
    _test()
>>>>>>> b875702c9c06ab5012e52ff4337439b03918f453
=======
"""Functions that read and write gzipped files.

The user of the file doesn't have to worry about the compression,
but random access is not allowed."""

# based on Andrew Kuchling's minigzip.py distributed with the zlib module

import struct, sys, time, os
import zlib
import builtins
import io

__all__ = ["GzipFile", "open", "compress", "decompress"]

FTEXT, FHCRC, FEXTRA, FNAME, FCOMMENT = 1, 2, 4, 8, 16

READ, WRITE = 1, 2

def open(filename, mode="rb", compresslevel=9,
         encoding=None, errors=None, newline=None):
    """Open a gzip-compressed file in binary or text mode.

    The filename argument can be an actual filename (a str or bytes object), or
    an existing file object to read from or write to.

    The mode argument can be "r", "rb", "w", "wb", "x", "xb", "a" or "ab" for
    binary mode, or "rt", "wt", "xt" or "at" for text mode. The default mode is
    "rb", and the default compresslevel is 9.

    For binary mode, this function is equivalent to the GzipFile constructor:
    GzipFile(filename, mode, compresslevel). In this case, the encoding, errors
    and newline arguments must not be provided.

    For text mode, a GzipFile object is created, and wrapped in an
    io.TextIOWrapper instance with the specified encoding, error handling
    behavior, and line ending(s).

    """
    if "t" in mode:
        if "b" in mode:
            raise ValueError("Invalid mode: %r" % (mode,))
    else:
        if encoding is not None:
            raise ValueError("Argument 'encoding' not supported in binary mode")
        if errors is not None:
            raise ValueError("Argument 'errors' not supported in binary mode")
        if newline is not None:
            raise ValueError("Argument 'newline' not supported in binary mode")

    gz_mode = mode.replace("t", "")
    if isinstance(filename, (str, bytes)):
        binary_file = GzipFile(filename, gz_mode, compresslevel)
    elif hasattr(filename, "read") or hasattr(filename, "write"):
        binary_file = GzipFile(None, gz_mode, compresslevel, filename)
    else:
        raise TypeError("filename must be a str or bytes object, or a file")

    if "t" in mode:
        return io.TextIOWrapper(binary_file, encoding, errors, newline)
    else:
        return binary_file

def write32u(output, value):
    # The L format writes the bit pattern correctly whether signed
    # or unsigned.
    output.write(struct.pack("<L", value))

class _PaddedFile:
    """Minimal read-only file object that prepends a string to the contents
    of an actual file. Shouldn't be used outside of gzip.py, as it lacks
    essential functionality."""

    def __init__(self, f, prepend=b''):
        self._buffer = prepend
        self._length = len(prepend)
        self.file = f
        self._read = 0

    def read(self, size):
        if self._read is None:
            return self.file.read(size)
        if self._read + size <= self._length:
            read = self._read
            self._read += size
            return self._buffer[read:self._read]
        else:
            read = self._read
            self._read = None
            return self._buffer[read:] + \
                   self.file.read(size-self._length+read)

    def prepend(self, prepend=b'', readprevious=False):
        if self._read is None:
            self._buffer = prepend
        elif readprevious and len(prepend) <= self._read:
            self._read -= len(prepend)
            return
        else:
            self._buffer = self._buffer[self._read:] + prepend
        self._length = len(self._buffer)
        self._read = 0

    def unused(self):
        if self._read is None:
            return b''
        return self._buffer[self._read:]

    def seek(self, offset, whence=0):
        # This is only ever called with offset=whence=0
        if whence == 1 and self._read is not None:
            if 0 <= offset + self._read <= self._length:
                self._read += offset
                return
            else:
                offset += self._length - self._read
        self._read = None
        self._buffer = None
        return self.file.seek(offset, whence)

    def __getattr__(self, name):
        return getattr(self.file, name)

class GzipFile(io.BufferedIOBase):
    """The GzipFile class simulates most of the methods of a file object with
    the exception of the readinto() and truncate() methods.

    This class only supports opening files in binary mode. If you need to open a
    compressed file in text mode, use the gzip.open() function.

    """

    myfileobj = None
    max_read_chunk = 10 * 1024 * 1024   # 10Mb

    def __init__(self, filename=None, mode=None,
                 compresslevel=9, fileobj=None, mtime=None):
        """Constructor for the GzipFile class.

        At least one of fileobj and filename must be given a
        non-trivial value.

        The new class instance is based on fileobj, which can be a regular
        file, an io.BytesIO object, or any other object which simulates a file.
        It defaults to None, in which case filename is opened to provide
        a file object.

        When fileobj is not None, the filename argument is only used to be
        included in the gzip file header, which may includes the original
        filename of the uncompressed file.  It defaults to the filename of
        fileobj, if discernible; otherwise, it defaults to the empty string,
        and in this case the original filename is not included in the header.

        The mode argument can be any of 'r', 'rb', 'a', 'ab', 'w', 'wb', 'x', or
        'xb' depending on whether the file will be read or written.  The default
        is the mode of fileobj if discernible; otherwise, the default is 'rb'.
        A mode of 'r' is equivalent to one of 'rb', and similarly for 'w' and
        'wb', 'a' and 'ab', and 'x' and 'xb'.

        The compresslevel argument is an integer from 0 to 9 controlling the
        level of compression; 1 is fastest and produces the least compression,
        and 9 is slowest and produces the most compression. 0 is no compression
        at all. The default is 9.

        The mtime argument is an optional numeric timestamp to be written
        to the stream when compressing.  All gzip compressed streams
        are required to contain a timestamp.  If omitted or None, the
        current time is used.  This module ignores the timestamp when
        decompressing; however, some programs, such as gunzip, make use
        of it.  The format of the timestamp is the same as that of the
        return value of time.time() and of the st_mtime member of the
        object returned by os.stat().

        """

        if mode and ('t' in mode or 'U' in mode):
            raise ValueError("Invalid mode: {!r}".format(mode))
        if mode and 'b' not in mode:
            mode += 'b'
        if fileobj is None:
            fileobj = self.myfileobj = builtins.open(filename, mode or 'rb')
        if filename is None:
            filename = getattr(fileobj, 'name', '')
            if not isinstance(filename, (str, bytes)):
                filename = ''
        if mode is None:
            mode = getattr(fileobj, 'mode', 'rb')

        if mode.startswith('r'):
            self.mode = READ
            # Set flag indicating start of a new member
            self._new_member = True
            # Buffer data read from gzip file. extrastart is offset in
            # stream where buffer starts. extrasize is number of
            # bytes remaining in buffer from current stream position.
            self.extrabuf = b""
            self.extrasize = 0
            self.extrastart = 0
            self.name = filename
            # Starts small, scales exponentially
            self.min_readsize = 100
            fileobj = _PaddedFile(fileobj)

        elif mode.startswith(('w', 'a', 'x')):
            self.mode = WRITE
            self._init_write(filename)
            self.compress = zlib.compressobj(compresslevel,
                                             zlib.DEFLATED,
                                             -zlib.MAX_WBITS,
                                             zlib.DEF_MEM_LEVEL,
                                             0)
        else:
            raise ValueError("Invalid mode: {!r}".format(mode))

        self.fileobj = fileobj
        self.offset = 0
        self.mtime = mtime

        if self.mode == WRITE:
            self._write_gzip_header()

    @property
    def filename(self):
        import warnings
        warnings.warn("use the name attribute", DeprecationWarning, 2)
        if self.mode == WRITE and self.name[-3:] != ".gz":
            return self.name + ".gz"
        return self.name

    def __repr__(self):
        fileobj = self.fileobj
        if isinstance(fileobj, _PaddedFile):
            fileobj = fileobj.file
        s = repr(fileobj)
        return '<gzip ' + s[1:-1] + ' ' + hex(id(self)) + '>'

    def _check_closed(self):
        """Raises a ValueError if the underlying file object has been closed.

        """
        if self.closed:
            raise ValueError('I/O operation on closed file.')

    def _init_write(self, filename):
        self.name = filename
        self.crc = zlib.crc32(b"") & 0xffffffff
        self.size = 0
        self.writebuf = []
        self.bufsize = 0

    def _write_gzip_header(self):
        self.fileobj.write(b'\037\213')             # magic header
        self.fileobj.write(b'\010')                 # compression method
        try:
            # RFC 1952 requires the FNAME field to be Latin-1. Do not
            # include filenames that cannot be represented that way.
            fname = os.path.basename(self.name)
            if not isinstance(fname, bytes):
                fname = fname.encode('latin-1')
            if fname.endswith(b'.gz'):
                fname = fname[:-3]
        except UnicodeEncodeError:
            fname = b''
        flags = 0
        if fname:
            flags = FNAME
        self.fileobj.write(chr(flags).encode('latin-1'))
        mtime = self.mtime
        if mtime is None:
            mtime = time.time()
        write32u(self.fileobj, int(mtime))
        self.fileobj.write(b'\002')
        self.fileobj.write(b'\377')
        if fname:
            self.fileobj.write(fname + b'\000')

    def _init_read(self):
        self.crc = zlib.crc32(b"") & 0xffffffff
        self.size = 0

    def _read_exact(self, n):
        data = self.fileobj.read(n)
        while len(data) < n:
            b = self.fileobj.read(n - len(data))
            if not b:
                raise EOFError("Compressed file ended before the "
                               "end-of-stream marker was reached")
            data += b
        return data

    def _read_gzip_header(self):
        magic = self.fileobj.read(2)
        if magic == b'':
            return False

        if magic != b'\037\213':
            raise OSError('Not a gzipped file')

        method, flag, self.mtime = struct.unpack("<BBIxx", self._read_exact(8))
        if method != 8:
            raise OSError('Unknown compression method')

        if flag & FEXTRA:
            # Read & discard the extra field, if present
            extra_len, = struct.unpack("<H", self._read_exact(2))
            self._read_exact(extra_len)
        if flag & FNAME:
            # Read and discard a null-terminated string containing the filename
            while True:
                s = self.fileobj.read(1)
                if not s or s==b'\000':
                    break
        if flag & FCOMMENT:
            # Read and discard a null-terminated string containing a comment
            while True:
                s = self.fileobj.read(1)
                if not s or s==b'\000':
                    break
        if flag & FHCRC:
            self._read_exact(2)     # Read & discard the 16-bit header CRC

        unused = self.fileobj.unused()
        if unused:
            uncompress = self.decompress.decompress(unused)
            self._add_read_data(uncompress)
        return True

    def write(self,data):
        self._check_closed()
        if self.mode != WRITE:
            import errno
            raise OSError(errno.EBADF, "write() on read-only GzipFile object")

        if self.fileobj is None:
            raise ValueError("write() on closed GzipFile object")

        # Convert data type if called by io.BufferedWriter.
        if isinstance(data, memoryview):
            data = data.tobytes()

        if len(data) > 0:
            self.size = self.size + len(data)
            self.crc = zlib.crc32(data, self.crc) & 0xffffffff
            self.fileobj.write( self.compress.compress(data) )
            self.offset += len(data)

        return len(data)

    def read(self, size=-1):
        self._check_closed()
        if self.mode != READ:
            import errno
            raise OSError(errno.EBADF, "read() on write-only GzipFile object")

        if self.extrasize <= 0 and self.fileobj is None:
            return b''

        readsize = 1024
        if size < 0:        # get the whole thing
            while self._read(readsize):
                readsize = min(self.max_read_chunk, readsize * 2)
            size = self.extrasize
        else:               # just get some more of it
            while size > self.extrasize:
                if not self._read(readsize):
                    if size > self.extrasize:
                        size = self.extrasize
                    break
                readsize = min(self.max_read_chunk, readsize * 2)

        offset = self.offset - self.extrastart
        chunk = self.extrabuf[offset: offset + size]
        self.extrasize = self.extrasize - size

        self.offset += size
        return chunk

    def read1(self, size=-1):
        self._check_closed()
        if self.mode != READ:
            import errno
            raise OSError(errno.EBADF, "read1() on write-only GzipFile object")

        if self.extrasize <= 0 and self.fileobj is None:
            return b''

        # For certain input data, a single call to _read() may not return
        # any data. In this case, retry until we get some data or reach EOF.
        while self.extrasize <= 0 and self._read():
            pass
        if size < 0 or size > self.extrasize:
            size = self.extrasize

        offset = self.offset - self.extrastart
        chunk = self.extrabuf[offset: offset + size]
        self.extrasize -= size
        self.offset += size
        return chunk

    def peek(self, n):
        if self.mode != READ:
            import errno
            raise OSError(errno.EBADF, "peek() on write-only GzipFile object")

        # Do not return ridiculously small buffers, for one common idiom
        # is to call peek(1) and expect more bytes in return.
        if n < 100:
            n = 100
        if self.extrasize == 0:
            if self.fileobj is None:
                return b''
            # Ensure that we don't return b"" if we haven't reached EOF.
            # 1024 is the same buffering heuristic used in read()
            while self.extrasize == 0 and self._read(max(n, 1024)):
                pass
        offset = self.offset - self.extrastart
        remaining = self.extrasize
        assert remaining == len(self.extrabuf) - offset
        return self.extrabuf[offset:offset + n]

    def _unread(self, buf):
        self.extrasize = len(buf) + self.extrasize
        self.offset -= len(buf)

    def _read(self, size=1024):
        if self.fileobj is None:
            return False

        if self._new_member:
            # If the _new_member flag is set, we have to
            # jump to the next member, if there is one.
            self._init_read()
            if not self._read_gzip_header():
                return False
            self.decompress = zlib.decompressobj(-zlib.MAX_WBITS)
            self._new_member = False

        # Read a chunk of data from the file
        buf = self.fileobj.read(size)

        # If the EOF has been reached, flush the decompression object
        # and mark this object as finished.

        if buf == b"":
            uncompress = self.decompress.flush()
            # Prepend the already read bytes to the fileobj to they can be
            # seen by _read_eof()
            self.fileobj.prepend(self.decompress.unused_data, True)
            self._read_eof()
            self._add_read_data( uncompress )
            return False

        uncompress = self.decompress.decompress(buf)
        self._add_read_data( uncompress )

        if self.decompress.unused_data != b"":
            # Ending case: we've come to the end of a member in the file,
            # so seek back to the start of the unused data, finish up
            # this member, and read a new gzip header.
            # Prepend the already read bytes to the fileobj to they can be
            # seen by _read_eof() and _read_gzip_header()
            self.fileobj.prepend(self.decompress.unused_data, True)
            # Check the CRC and file size, and set the flag so we read
            # a new member on the next call
            self._read_eof()
            self._new_member = True
        return True

    def _add_read_data(self, data):
        self.crc = zlib.crc32(data, self.crc) & 0xffffffff
        offset = self.offset - self.extrastart
        self.extrabuf = self.extrabuf[offset:] + data
        self.extrasize = self.extrasize + len(data)
        self.extrastart = self.offset
        self.size = self.size + len(data)

    def _read_eof(self):
        # We've read to the end of the file
        # We check the that the computed CRC and size of the
        # uncompressed data matches the stored values.  Note that the size
        # stored is the true file size mod 2**32.
        crc32, isize = struct.unpack("<II", self._read_exact(8))
        if crc32 != self.crc:
            raise OSError("CRC check failed %s != %s" % (hex(crc32),
                                                         hex(self.crc)))
        elif isize != (self.size & 0xffffffff):
            raise OSError("Incorrect length of data produced")

        # Gzip files can be padded with zeroes and still have archives.
        # Consume all zero bytes and set the file position to the first
        # non-zero byte. See http://www.gzip.org/#faq8
        c = b"\x00"
        while c == b"\x00":
            c = self.fileobj.read(1)
        if c:
            self.fileobj.prepend(c, True)

    @property
    def closed(self):
        return self.fileobj is None

    def close(self):
        if self.fileobj is None:
            return
        if self.mode == WRITE:
            self.fileobj.write(self.compress.flush())
            write32u(self.fileobj, self.crc)
            # self.size may exceed 2GB, or even 4GB
            write32u(self.fileobj, self.size & 0xffffffff)
            self.fileobj = None
        elif self.mode == READ:
            self.fileobj = None
        if self.myfileobj:
            self.myfileobj.close()
            self.myfileobj = None

    def flush(self,zlib_mode=zlib.Z_SYNC_FLUSH):
        self._check_closed()
        if self.mode == WRITE:
            # Ensure the compressor's buffer is flushed
            self.fileobj.write(self.compress.flush(zlib_mode))
            self.fileobj.flush()

    def fileno(self):
        """Invoke the underlying file object's fileno() method.

        This will raise AttributeError if the underlying file object
        doesn't support fileno().
        """
        return self.fileobj.fileno()

    def rewind(self):
        '''Return the uncompressed stream file position indicator to the
        beginning of the file'''
        if self.mode != READ:
            raise OSError("Can't rewind in write mode")
        self.fileobj.seek(0)
        self._new_member = True
        self.extrabuf = b""
        self.extrasize = 0
        self.extrastart = 0
        self.offset = 0

    def readable(self):
        return self.mode == READ

    def writable(self):
        return self.mode == WRITE

    def seekable(self):
        return True

    def seek(self, offset, whence=0):
        if whence:
            if whence == 1:
                offset = self.offset + offset
            else:
                raise ValueError('Seek from end not supported')
        if self.mode == WRITE:
            if offset < self.offset:
                raise OSError('Negative seek in write mode')
            count = offset - self.offset
            chunk = bytes(1024)
            for i in range(count // 1024):
                self.write(chunk)
            self.write(bytes(count % 1024))
        elif self.mode == READ:
            if offset < self.offset:
                # for negative seek, rewind and do positive seek
                self.rewind()
            count = offset - self.offset
            for i in range(count // 1024):
                self.read(1024)
            self.read(count % 1024)

        return self.offset

    def readline(self, size=-1):
        if size < 0:
            # Shortcut common case - newline found in buffer.
            offset = self.offset - self.extrastart
            i = self.extrabuf.find(b'\n', offset) + 1
            if i > 0:
                self.extrasize -= i - offset
                self.offset += i - offset
                return self.extrabuf[offset: i]

            size = sys.maxsize
            readsize = self.min_readsize
        else:
            readsize = size
        bufs = []
        while size != 0:
            c = self.read(readsize)
            i = c.find(b'\n')

            # We set i=size to break out of the loop under two
            # conditions: 1) there's no newline, and the chunk is
            # larger than size, or 2) there is a newline, but the
            # resulting line would be longer than 'size'.
            if (size <= i) or (i == -1 and len(c) > size):
                i = size - 1

            if i >= 0 or c == b'':
                bufs.append(c[:i + 1])    # Add portion of last chunk
                self._unread(c[i + 1:])   # Push back rest of chunk
                break

            # Append chunk to list, decrease 'size',
            bufs.append(c)
            size = size - len(c)
            readsize = min(size, readsize * 2)
        if readsize > self.min_readsize:
            self.min_readsize = min(readsize, self.min_readsize * 2, 512)
        return b''.join(bufs) # Return resulting line

def compress(data, compresslevel=9):
    """Compress data in one shot and return the compressed string.
    Optional argument is the compression level, in range of 0-9.
    """
    buf = io.BytesIO()
    with GzipFile(fileobj=buf, mode='wb', compresslevel=compresslevel) as f:
        f.write(data)
    return buf.getvalue()

def decompress(data):
    """Decompress a gzip compressed string in one shot.
    Return the decompressed string.
    """
    with GzipFile(fileobj=io.BytesIO(data)) as f:
        return f.read()

def _test():
    # Act like gzip; with -d, act like gunzip.
    # The input file is not deleted, however, nor are any other gzip
    # options or features supported.
    args = sys.argv[1:]
    decompress = args and args[0] == "-d"
    if decompress:
        args = args[1:]
    if not args:
        args = ["-"]
    for arg in args:
        if decompress:
            if arg == "-":
                f = GzipFile(filename="", mode="rb", fileobj=sys.stdin.buffer)
                g = sys.stdout.buffer
            else:
                if arg[-3:] != ".gz":
                    print("filename doesn't end in .gz:", repr(arg))
                    continue
                f = open(arg, "rb")
                g = builtins.open(arg[:-3], "wb")
        else:
            if arg == "-":
                f = sys.stdin.buffer
                g = GzipFile(filename="", mode="wb", fileobj=sys.stdout.buffer)
            else:
                f = builtins.open(arg, "rb")
                g = open(arg + ".gz", "wb")
        while True:
            chunk = f.read(1024)
            if not chunk:
                break
            g.write(chunk)
        if g is not sys.stdout.buffer:
            g.close()
        if f is not sys.stdin.buffer:
            f.close()

if __name__ == '__main__':
    _test()
>>>>>>> b875702c9c06ab5012e52ff4337439b03918f453


text:
var _jsxWrapper = function _jsxWrapper(func, args) {
  return {
    __jsxDOMWrapper: true,
    func: func,
    args: args
  };
};

var _span$wrapper = function _span$wrapper(_MyBarIs$concat) {
  elementOpen("span", null, null, "foo", _MyBarIs$concat);
  text("one");
  return elementClose("span");
},
    _span$wrapper2 = function _span$wrapper2(_foo) {
  elementOpen("span", null, null, "foo", _foo);
  text("two");
  return elementClose("span");
},
    _span$wrapper3 = function _span$wrapper3(_foo2) {
  elementOpen("span", null, null, "foo", _foo2);
  text("three");
  return elementClose("span");
};

function renderMain() {
  function renderState(_ref) {
    var bar = _ref.bar;
    return [_jsxWrapper(_span$wrapper, ["My bar is: ".concat(bar)]), _jsxWrapper(_span$wrapper2, ["My bar is: ".concat(bar)]), _jsxWrapper(_span$wrapper3, ["My bar is: ".concat(bar)])];
  }

  var state = {
    bar: 'Hello World'
  };
  return renderState(state);
}

redpajama_set_name: RedPajamaGithub


text:
local C = inn.C

local SpatialStochasticPooling, parent = torch.class('inn.SpatialStochasticPooling', 'nn.SpatialMaxPooling')

function SpatialStochasticPooling:__init(kW, kH, dW, dH)
  parent.__init(self, kW, kH, dW, dH)
  self.train = true
  self:cuda()
end

function SpatialStochasticPooling:updateOutput(input)
  assert(torch.isTypeOf(input, 'torch.CudaTensor'))
  C.SpatialStochasticPooling_updateOutput(cutorch.getState(), input:cdata(), self.output:cdata(),
  	self.indices:cdata(), self.kW, self.kH, self.dW, self.dH, self.train)
  return self.output
end

function SpatialStochasticPooling:updateGradInput(input, gradOutput)
  assert(torch.isTypeOf(input, 'torch.CudaTensor'))
  assert(torch.isTypeOf(gradOutput, 'torch.CudaTensor'))
  C.SpatialStochasticPooling_updateGradInput(cutorch.getState(), input:cdata(), self.gradInput:cdata(),
  	gradOutput:cdata(), self.indices:cdata(), self.kW, self.kH, self.dW, self.dH)
  return self.gradInput
end


text:
@interface TiRESTUnitTestBase : SenTestCase

@end


text:
// Copyright 2016 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

using System;
using System.Diagnostics;
using System.IO;
using System.Reflection;

namespace CodeGen {
  class Program {
    static void Main(string[] args) {
      var programLocation = Path.GetDirectoryName(Assembly.GetEntryAssembly().Location);
      Debug.Assert(programLocation != null, "programLocation != null");

      var path1 = Path.Combine(programLocation, @"..\..\..\WindowsAccessBridgeInterop\Generated.cs");
      if (args.Length >= 1) {
        path1 = Path.Combine(Environment.CurrentDirectory, args[0]);
      }
      var path2 = Path.Combine(programLocation, @"..\..\..\WindowsAccessBridgeInterop\Generated.Internal.cs");
      if (args.Length >= 2) {
        path2 = Path.Combine(Environment.CurrentDirectory, args[1]);
      }
      var path3 = Path.Combine(programLocation, @"..\..\..\WindowsAccessBridgeInterop\Generated.Internal.Legacy.cs");
      if (args.Length >= 3) {
        path3 = Path.Combine(Environment.CurrentDirectory, args[2]);
      }

      var codeGen = new CodeGen(new CodeGenOptions {
        PublicClassesOutputFileName = path1,
        InternalClassesOutputFileName = path2,
        InternalLegacyClassesOutputFileName = path3,
      });
      codeGen.Generate();
    }
  }
}


text:
package org.ripple.power.txns.data;

import org.json.JSONObject;

public class TransactionStats {

	public String time;
	public int AccountSet;
	public int Payment;
	public int TrustSet;
	public int OfferCreate;
	public int OfferCancel;

	public void from(JSONObject obj) {
		if (obj != null) {
			this.time = obj.optString("time");
			this.OfferCancel = obj.optInt("OfferCancel");
			this.OfferCreate = obj.optInt("OfferCreate");
			this.TrustSet = obj.optInt("TrustSet");
			this.Payment = obj.optInt("Payment");
			this.AccountSet = obj.optInt("AccountSet");
		}
	}
}


text:
            <form name="decisionTableForm">

{{'DECISION-TABLE.POPUP.SAVE-DECISION-TABLE-TITLE' | translate}}

{{'DECISION-TABLE.POPUP.SAVE-DESCRIPTION' | translate}}

 0" class="alert error"
                         style="font-size: 14px; margin-top:20px">

                            {{saveDialog.errorMessage}}

                        {{'DECISION-TABLE.NAME' | translate}}
                        <input ng-disabled="model.loading" type="text" class="form-control" name="name"
                               ng-required="true"
                               id="decisiontableName" ng-model="saveDialog.name" maxlength="400" auto-focus
                               editor-input-check>

                        {{'DECISION-TABLE.KEY' | translate}}
                        <input ng-disabled="model.loading" type="text" class="form-control" name="key" maxlength="255"
                               ng-required="true"
                               id="decisiontableKey" data-ng-trim="false" spaceless-value ng-model="saveDialog.key"
                               editor-input-check ng-pattern="keyFieldPattern">

                        {{'DECISION-TABLE.DESCRIPTION' | translate}}
                        <textarea ng-disabled="model.loading" class="form-control" id="decisiontableDescription"
                                  rows="5" ng-model="saveDialog.description"></textarea>

                            <input type="checkbox" ng-disabled="status.loading" ng-model="saveDialog.newVersion">
                            {{'MODEL.SAVE.NEWVERSION' | translate}}

                        {{'MODEL.SAVE.COMMENT' | translate}}
                        <textarea id="commentTextArea" class="form-control" ng-model="saveDialog.comment"
                                  ng-disabled="status.loading"></textarea>

                        <button class="btn btn-sm btn-default" ng-click="cancel()" ng-disabled="model.loading"
                                translate>GENERAL.ACTION.CANCEL
                        </button>
                        <button class="btn btn-primary" ng-click="saveAndClose()"
                                ng-disabled="status.loading || !decisionTableForm.$valid || readOnly"
                                ng-show="!error && !error.isConflict" translate>ACTION.SAVE-AND-CLOSE
                        </button>
                        <button class="btn btn-primary" ng-click="save()"
                                ng-disabled="status.loading || !decisionTableForm.$valid || readOnly"
                                ng-show="!error && !error.isConflict" translate>ACTION.SAVE
                        </button>

            </form>


text:
//
//  speechRecognizer.m
//  Hear for me
//
//  Created by Jordi Chulia on 06/10/14.
//  Copyright (c) 2014 Jordi Chulia. All rights reserved.
//

#import "speechRecognizer.h"
#import "Hear_for_me-Swift.h"

#define REFRESH_INTERVAL 3 /* seconds */

const unsigned char SpeechKitApplicationKey[] = PRIVATE_SpeechKitApplicationKey;

@implementation speechRecognizer

@synthesize recognizer;
@synthesize textview;
@synthesize shouldListen;

const NSString* nuanceID = PRIVATE_nuanceID;
const NSString* nuanceHost = @"sslsandbox.nmdp.nuancemobility.net";

NSString* hearingLanguage;
NSString* translatingSource;
NSString* translatingTarget;
bool    wantsTranslation;
bool    waitForTranslation;
integer_t    status;

ViewController* vc;

-(id) init
{
    self = [super init];
    shouldListen = 0;

    return self;
}

-(void) setup: (ViewController *) sender
{
    //[self setRecognizerStatus:SETUP];
    NSLog(@"Setting up");
    vc = sender;
    [SpeechKit setupWithID:(NSString*)nuanceID
                      host:(NSString*)nuanceHost
                      port:443
                    useSSL:YES
                  delegate:nil];
    [self setRecognizerStatus:IDLE];
}

-(void) recognizeNowWithStopType:(SKEndOfSpeechDetection) StopDetectionType
{
    NSLog(@"Starting recognition");
    [self setRecognizerStatus:PREPARING];
    if (recognizer) recognizer = nil;
    recognizer = [[SKRecognizer alloc] initWithType:SKDictationRecognizerType
                                          detection:StopDetectionType
                                           language:hearingLanguage
                                           delegate:self];

    if (recognizer == nil){ [self setRecognizerStatus:IDLE]; }
}

-(void) recognizerDidBeginRecording:(SKRecognizer *)recognizer
{
    NSLog(@"Begin recording");
    [self setRecognizerStatus:HEARING];
}

-(void) recognizerDidFinishRecording:(SKRecognizer *)recognizer
{
    NSLog(@"Finish recording");
    [self setRecognizerStatus:PROCESSING];
}

-(void) recognizer:(SKRecognizer *)r didFinishWithError:(NSError *)error suggestion:(NSString *)suggestion
{
    NSLog(@"Recognition error: %@", error);
    recognizer = nil;
    if (error.code == SKCancelledError) {
        [self setRecognizerStatus:IDLE];
    }
    else {
        [self setRecognizerStatus:ERROR];
    }
}

-(void) recognizer:(SKRecognizer *)r didFinishWithResults:(SKRecognition *)results
{

    NSLog(@"Result: %@", [results firstResult]);

    if ([results firstResult]){

        NSString* finalText;

        if(wantsTranslation){
            NSString* translatedText = [Translator translate:[results firstResult] fromLang:translatingSource toLang:translatingTarget];
            if ( translatedText != nil ) {
                finalText = translatedText;
            }
            else { finalText = @"--???--";}
        }
        else {
            finalText = [results firstResult];
        }

        [textview insertText:finalText];
        [textview insertText:@"\n"];
        NSRange range = NSMakeRange([textview.text length]-2, [textview.text length]-1);
        [textview scrollRangeToVisible:range];

    }
    NSLog(@"Heard string: %@", [textview text]);
    r = nil;

    if (shouldListen) {
        [self setRecognizerStatus:RESTARTING];
    }
    else {
        [self setRecognizerStatus:IDLE];
    }
}

-(void) startRecognition
{
    shouldListen = true;
    while (status == IDLE || status == RESTARTING)
        [self recognizeNowWithStopType:SKLongEndOfSpeechDetection];
}

-(void) stopRecognitionShouldBroadcastStatus:(BOOL)shouldBroadcast
{
    shouldListen = false;
    [recognizer stopRecording];
    if (shouldBroadcast) [self setRecognizerStatus:PROCESSING];
}

-(void) cancelRecognitionShouldBroadcastStatus:(BOOL) shouldBroadcast;
{
    shouldListen = 0;
    [recognizer cancel];
    if (shouldBroadcast) [self setRecognizerStatus:IDLE];
}

-(void) destroyRecognizer
{
    [SpeechKit destroy];
    [self setRecognizerStatus:IDLE];
}

-(void) setHearingLanguage:(NSString *)hLang translatingSource:(NSString *)tSourceLang translatingTarget:(NSString *)tTargetLang wantsTranslation:(BOOL)hasToTranslate
{
    hearingLanguage = hLang;
    translatingSource = tSourceLang;
    translatingTarget = tTargetLang;
    wantsTranslation = hasToTranslate;
}

-(float) getAudioLevel
{
    /*
     recognizer.audioLevel ranges from -90 to 0
     This function returns a value between 0 and 1
     */
    return (recognizer.audioLevel + 90)/90;
}

-(void) broadcastStatus
{
    [vc setRecognizerStatusInMainVC:status];
}

-(void) setRecognizerStatus: (int) newStatus
{
    status = newStatus;
    [self broadcastStatus];
}

@end


text:
import logging
import os

import requests

from monasca_setup import agent_config
from monasca_setup import detection
from monasca_setup.detection import utils

LOG = logging.getLogger(__name__)

_KIBANA_CFG_FILE = '/opt/kibana/config/kibana.yml'
_API_STATUS = 'api/status'
_METRIC_ALIASES = {
    'heap_total': 'heap_size',
    'requests_per_second': 'req_sec',
    'response_time_avg': 'resp_time_avg',
    'response_time_max': 'resp_time_max'
}

def _to_snake_case(word):
    final = ''
    for item in word:
        if item.isupper():
            final += "_" + item.lower()
        else:
            final += item
    if final[0] == "_":
        final = final[1:]
    return final

def get_metric_name(metric):
    actual_name = _to_snake_case(metric)
    return _METRIC_ALIASES.get(actual_name, actual_name)

class Kibana(detection.Plugin):
    def _detect(self):
        # check process and port

        process_found = utils.find_process_cmdline('kibana') is not None
        has_deps = self.dependencies_installed()

        has_args = self.args is not None
        cfg_file = self._get_config_file() if has_args else _KIBANA_CFG_FILE
        has_config_file = os.path.isfile(cfg_file)

        available = process_found and has_deps and has_config_file

        self.available = available

        if not self.available:
            err_str = 'Plugin for Kibana will not be configured.'
            if not process_found:
                LOG.error('Kibana process has not been found. %s' % err_str)
            elif not has_deps:
                LOG.error('Kibana plugin dependencies are not satisfied. '
                          'Module "pyaml" not found. %s'
                          % err_str)
            elif not has_config_file:
                LOG.error('Kibana plugin cannot find configuration file %s. %s'
                          % (cfg_file, err_str))

    def build_config(self):
        kibana_config = self._get_config_file()

        try:
            (kibana_host,
             kibana_port,
             kibana_protocol) = self._read_config(kibana_config)
        except Exception as ex:
            LOG.error('Failed to read configuration at %s' % kibana_config)
            LOG.exception(ex)
            return

        if kibana_protocol == 'https':
            LOG.error('"https" protocol is currently not supported')
            return None

        config = agent_config.Plugins()

        # retrieve user name and set in config
        # if passed in args (note args are optional)
        if (self.args and 'kibana-user' in self.args and
                self.args['kibana-user']):
            process = detection.watch_process_by_username(
                username=self.args['kibana-user'],
                process_name='kibana',
                service='monitoring',
                component='kibana'
            )
        else:
            process = detection.watch_process(['kibana'],
                                              service='monitoring',
                                              component='kibana',
                                              process_name='kibana')

        config.merge(process)

        kibana_url = '%s://%s:%d' % (
            kibana_protocol,
            kibana_host,
            kibana_port
        )

        if not self._has_metrics_support(kibana_url):
            LOG.warning('Running kibana does not support metrics, skipping...')
            return None
        else:
            metrics = self._get_all_metrics(kibana_url)
            config['kibana'] = {
                'init_config': {
                    'url': '%s/%s' % (kibana_url, _API_STATUS),
                },
                'instances': [
                    {
                        'metrics': metrics
                    }
                ]
            }

        LOG.info('\tWatching the kibana process.')

        return config

    def dependencies_installed(self):
        try:
            import yaml
        except Exception:
            return False
        return True

    def _get_config_file(self):
        if self.args is not None:
            kibana_config = self.args.get('kibana-config', _KIBANA_CFG_FILE)
        else:
            kibana_config = _KIBANA_CFG_FILE
        return kibana_config

    @staticmethod
    def _read_config(kibana_cfg):
        import yaml
        with open(kibana_cfg, 'r') as stream:
            document = yaml.safe_load(stream=stream)

            has_ssl_support = ('server.ssl.cert' in document and
                               'server.ssl.key' in document)

            host = document.get('server.host')
            port = int(document.get('server.port'))
            protocol = 'https' if has_ssl_support else 'http'

            return host, port, protocol

    def _get_all_metrics(self, kibana_url):
        resp = self._get_metrics_request(kibana_url)
        data = resp.json()

        metrics = []
        # do not check plugins, check will go for overall status

        # get metrics
        for metric in data.get('metrics').keys():
            metrics.append(get_metric_name(metric))

        return metrics

    def _has_metrics_support(self, kibana_url):
        resp = self._get_metrics_request(kibana_url, method='HEAD')
        status_code = resp.status_code
        # although Kibana will respond with 400:Bad Request
        # it means that URL is available but simply does
        # not support HEAD request
        # Looks like guys from Kibana just support GET for this url
        return status_code == 400

    def _get_metrics_request(self, url, method='GET'):
        request_url = '%s/%s' % (url, _API_STATUS)
        return requests.request(method=method, url=request_url)


text:
title: Apache Mesos - IPC Namespace Isolator in Mesos Containerizer
layout: documentation
---

# IPC Namespace Isolator in Mesos Containerizer

The IPC Namespace isolator can be used on Linux to place container in a
distinct IPC namespace (for isolating System V IPC resources and POSIX
message queue) and provide the container its own /dev/shm (for isolating
POSIX shared memory). The benefits of this are:

1. Visibility: Any IPC objects created in the container are private and
   cannot be seen by any other containers.

2. Clean termination: When the container is destroyed, any IPC objects
   created in the container will be automatically removed.

To enable the IPC namespace isolator, append `namespaces/ipc` to the `--isolation`
flag when starting the agent. Note that `filesystem/linux` isolator is required
for turning on IPC namespace isolator.

Framework users can control the behavior of a container's IPC namespace
and /dev/shm by setting the `ContainerInfo.linux_info.ipc_mode` field:

1. If set to `SHARE_PARENT`, the container will share the IPC namespace and
   /dev/shm with its parent. If the container is a top level container,
   it will share the IPC namespace and /dev/shm with the agent host, if
   the container is a nested container, it will share the IPC namespace
   and /dev/shm with its parent container. The implication is if a nested
   container wants to share the IPC namespace and /dev/shm with the agent
   host, its parent container has to do it first.

2. If set to `PRIVATE`, the container will have its own IPC namespace and
   /dev/shm.

3. If not set, for backward compatibility we will keep the previous behavior:
   Top level container will have its own IPC namespace and nested container
   will share the IPC namespace with its parent container. If the container
   does not have its own rootfs, it will share agent's /dev/shm, otherwise
   it will have its own /dev/shm.

As a security measure, operators can disallow any containers to share the
agent's IPC namespace and /dev/shm by setting the agent flag
`--disallow_sharing_agent_ipc_namespace` to `true`. If this agent flag is set to `false`
and the framework requests to launch a top level container to share the
agent's IPC namespace and /dev/shm, the container launch will be rejected.

Framework users can specify the size of a container's /dev/shm in MB by
setting the `ContainerInfo.linux_info.shm_size` field, and operators can specify
the default size of /dev/shm via the agent flag `--default_container_shm_size`.
So if the `ContainerInfo.linux_info.shm_size` field is not set, the size of
container's /dev/shm will be value of the `--default_container_shm_size` agent
flag, if that flag is not set too, the size of the /dev/shm will be half
of the agent host RAM which is the default behavior of Linux. The
`ContainerInfo.linux_info.shm_size` field will be ignored for the container which
shares its parent's /dev/shm.

Please note that we only support setting the `ContainerInfo.linux_info.shm_size` field
when the `ContainerInfo.linux_info.ipc_mode` field is set to `PRIVATE`, otherwise the
container launch will be rejected.


text:
package Win32::Registry;

use strict;
use warnings;

use vars qw($HKEY_LOCAL_MACHINE);

use Exporter ();
our (@EXPORT, @ISA);
@ISA    = qw(Exporter);
@EXPORT = qw($HKEY_LOCAL_MACHINE);

1;


text:
var _ = require('underscore');
/**
 * reverse an array or a string
 *
 * {{ 'abc' | reverse }} => 'cba'
 * {{ [1,2,3] | reverse }} => [3,2,1]
 */

function reverse(collection) {
    if (typeof collection === 'string') {
        return collection.split('').reverse().join('');
    }
    if(_.isArray(collection)){
        return collection.concat().reverse();
    }
    return collection;
}

module.exports =  reverse;


text:
'use strict'

const Qs = require('qs')
const ndjson = require('ndjson')
const isNode = require('detect-node')
const once = require('once')
const concat = require('concat-stream')

const getFilesStream = require('./get-files-stream')
const request = require('./request')

// -- Internal

function parseChunkedJson (res, cb) {
  res
    .pipe(ndjson.parse())
    .once('error', cb)
    .pipe(concat((data) => cb(null, data)))
}

function parseRaw (res, cb) {
  res
    .once('error', cb)
    .pipe(concat((data) => cb(null, data)))
}

function parseJson (res, cb) {
  res
    .once('error', cb)
    .pipe(concat((data) => {
      if (!data || data.length === 0) {
        return cb()
      }

      if (Buffer.isBuffer(data)) {
        data = data.toString()
      }

      let res
      try {
        res = JSON.parse(data)
      } catch (err) {
        return cb(err)
      }

      cb(null, res)
    }))
}

function onRes (buffer, cb) {
  return (res) => {
    const stream = Boolean(res.headers['x-stream-output'])
    const chunkedObjects = Boolean(res.headers['x-chunked-output'])
    const isJson = res.headers['content-type'] &&
                   res.headers['content-type'].indexOf('application/json') === 0

    if (res.statusCode >= 400 || !res.statusCode) {
      const error = new Error(`Server responded with ${res.statusCode}`)

      parseJson(res, (err, payload) => {
        if (err) {
          return cb(err)
        }
        if (payload) {
          error.code = payload.Code
          error.message = payload.Message || payload.toString()
        }
        cb(error)
      })
    }

    if (stream && !buffer) {
      return cb(null, res)
    }

    if (chunkedObjects && isJson) {
      return parseChunkedJson(res, cb)
    }

    if (isJson) {
      return parseJson(res, cb)
    }

    parseRaw(res, cb)
  }
}

function requestAPI (config, options, callback) {
  options.qs = options.qs || {}
  callback = once(callback)

  if (Array.isArray(options.files)) {
    options.qs.recursive = true
  }

  if (Array.isArray(options.path)) {
    options.path = options.path.join('/')
  }
  if (options.args && !Array.isArray(options.args)) {
    options.args = [options.args]
  }
  if (options.args) {
    options.qs.arg = options.args
  }
  if (options.files && !Array.isArray(options.files)) {
    options.files = [options.files]
  }

  if (options.qs.r) {
    options.qs.recursive = options.qs.r
    // From IPFS 0.4.0, it throws an error when both r and recursive are passed
    delete options.qs.r
  }

  options.qs['stream-channels'] = true

  let stream
  if (options.files) {
    stream = getFilesStream(options.files, options.qs)
  }

  // this option is only used internally, not passed to daemon
  delete options.qs.followSymlinks

  const method = 'POST'
  const headers = {}

  if (isNode) {
    // Browsers do not allow you to modify the user agent
    headers['User-Agent'] = config['user-agent']
  }

  if (options.files) {
    if (!stream.boundary) {
      return callback(new Error('No boundary in multipart stream'))
    }

    headers['Content-Type'] = `multipart/form-data; boundary=${stream.boundary}`
  }

  const qs = Qs.stringify(options.qs, {arrayFormat: 'repeat'})
  const req = request(config.protocol)({
    hostname: config.host,
    path: `${config['api-path']}${options.path}?${qs}`,
    port: config.port,
    method: method,
    headers: headers
  }, onRes(options.buffer, callback))

  req.on('error', (err) => {
    callback(err)
  })

  if (options.files) {
    stream.pipe(req)
  } else {
    req.end()
  }

  return req
}

//
// -- Module Interface

exports = module.exports = function getRequestAPI (config) {
  /*
   * options: {
   *   path:   // API path (like /add or /config) - type: string
   *   args:   // Arguments to the command - type: object
   *   qs:     // Opts as query string opts to the command --something - type: object
   *   files:  // files to be sent - type: string, buffer or array of strings or buffers
   *   buffer: // buffer the request before sending it - type: bool
   * }
   */
  const send = function (options, callback) {
    if (typeof options !== 'object') {
      return callback(new Error('no options were passed'))
    }

    return requestAPI(config, options, callback)
  }

  // Wraps the 'send' function such that an asynchronous
  // transform may be applied to its result before
  // passing it on to either its callback or promise.
  send.withTransform = function (transform) {
    return function (options, callback) {
      if (typeof options !== 'object') {
        return callback(new Error('no options were passed'))
      }

      send(options, wrap(callback))

      function wrap (func) {
        if (func) {
          return function (err, res) {
            transform(err, res, send, func)
          }
        }
      }
    }
  }

  return send
}