Qore Programming Language 0.8.8

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QoreFile Class Reference

provides controlled access to file data through Qore data structures More...

`#include <QoreFile.h>`

## Public Member Functions
DLLEXPORT | QoreFile (const QoreEncoding *cs=QCS_DEFAULT)
| creates the object and sets the default encoding
DLLEXPORT | ~QoreFile ()
| closes the file and frees all memory allocated to the object
DLLEXPORT int | chown (uid_t owner, gid_t group, ExceptionSink *xsink)
| changes ownership of the file (if possible)
DLLLOCAL void | cleanup (ExceptionSink *xsink)
| internal API, must be called before deleting the object if an event queue is set
DLLEXPORT int | close ()
| closes the file More...
DLLEXPORT QoreStringNode * | getchar ()
| reads a single byte from the file and returns it as a new string, caller owns the reference count returned More...
DLLEXPORT QoreStringNode * | getchar (ExceptionSink *xsink)
| reads a single character from the file and returns it as a new string, caller owns the reference count returned More...
DLLEXPORT const QoreEncoding * | getEncoding () const
| returns the encoding used for the file
DLLEXPORT int | getFD () const
| get file descriptor
DLLEXPORT QoreStringNode * | getFileName () const
| returns the filename of the file being read (NULL if no file name is set); caller owns the reference count returned
DLLEXPORT std::string | getFileNameStr () const
| returns the filename of the file being read as a std::string (the string is empty if no file name is set)
DLLEXPORT int | getLockInfo (struct flock &fl, ExceptionSink *xsink)
| get lock info operation, does not block
DLLEXPORT qore_size_t | getPos ()
| returns the absolute byte position in the file More...
DLLEXPORT qore_size_t | getPos () const
| returns the absolute byte position in the file More...
DLLLOCAL int | getTerminalAttributes (QoreTermIOS *ios, ExceptionSink *xsink) const
| gets terminal attributes
DLLEXPORT QoreHashNode * | hstat (ExceptionSink *xsink) const
| returns a QoreHashNode with file status information More...
DLLEXPORT bool | isDataAvailable (int timeout_ms, ExceptionSink *xsink) const
| returns true if data is available for the file descriptor More...
DLLEXPORT bool | isOpen () const
| returns true if the file is open, false if not
DLLEXPORT bool | isTty () const
| returns true if the file is a tty
DLLEXPORT int | lock (const struct flock &fl, ExceptionSink *xsink)
| perform a file lock operation, does not block
DLLEXPORT int | lockBlocking (struct flock &fl, ExceptionSink *xsink)
| perform a file lock operation
DLLEXPORT int | open (const char *fn, int flags=O_RDONLY, int mode=0777, const QoreEncoding *cs=QCS_DEFAULT)
| opens the file and returns 0 for success, non-zero for error More...
DLLEXPORT int | open2 (ExceptionSink *xsink, const char *fn, int flags=O_RDONLY, int mode=0777, const QoreEncoding *cs=QCS_DEFAULT)
| opens the file and raises a Qore-language exception if an error occurs More...
DLLEXPORT QoreStringNode * | read (qore_offset_t size, ExceptionSink *xsink)
| reads string data from the file and returns the string read (caller owns the reference count returned) More...
DLLEXPORT int | read (QoreString &str, qore_offset_t size, ExceptionSink *xsink)
| reads string data from the file into a QoreString object (or subclass, such as QoreStringNode) and returns 0 for OK or non-zero for error More...
DLLEXPORT QoreStringNode * | read (qore_offset_t size, int timeout_ms, ExceptionSink *xsink)
| reads string data from the file and returns the string read (caller owns the reference count returned) More...
DLLEXPORT BinaryNode * | readBinary (qore_offset_t size, ExceptionSink *xsink)
| reads binary data from the file and returns the data read (caller owns the reference count returned) More...
DLLEXPORT int | readBinary (BinaryNode &b, qore_offset_t size, ExceptionSink *xsink)
| reads binary data from the file into a BinaryNode object and returns 0 for OK or non-zero for error More...
DLLEXPORT BinaryNode * | readBinary (qore_offset_t size, int timeout_ms, ExceptionSink *xsink)
| reads binary data from the file and returns the data read (caller owns the reference count returned) More...
DLLEXPORT int | readi1 (char *val, ExceptionSink *xsink)
| reads a 1-byte signed integer from the file and returns the value read as an output parameter More...
DLLEXPORT int | readi2 (short *val, ExceptionSink *xsink)
| reads a 2-byte signed integer from the file in MSB (Most Significant Byte first, big endian) format and returns the value read as an output parameter More...
DLLEXPORT int | readi2LSB (short *val, ExceptionSink *xsink)
| reads a 2-byte signed integer from the file in LSB (Least Significant Byte first, big endian) format and returns the value read as an output parameter More...
DLLEXPORT int | readi4 (int *val, ExceptionSink *xsink)
| reads a 4-byte signed integer from the file in MSB (Most Significant Byte first, big endian) format and returns the value read as an output parameter More...
DLLEXPORT int | readi4LSB (int *val, ExceptionSink *xsink)
| reads a 4-byte signed integer from the file in LSB (Least Significant Byte first, big endian) format and returns the value read as an output parameter More...
DLLEXPORT int | readi8 (int64 *val, ExceptionSink *xsink)
| reads an 8-byte signed integer from the file in MSB (Most Significant Byte first, big endian) format and returns the value read as an output parameter More...
DLLEXPORT int | readi8LSB (int64 *val, ExceptionSink *xsink)
| reads an 8-byte signed integer from the file in LSB (Least Significant Byte first, big endian) format and returns the value read as an output parameter More...
DLLEXPORT QoreStringNode * | readLine (ExceptionSink *xsink)
| reads string data from the file up to and including the terminating EOL characters (can be `"\n"`, `"\r"` or `"\r\n"`) and returns the string read with the EOL characters More...
DLLEXPORT QoreStringNode * | readLine (bool incl_eol, ExceptionSink *xsink)
| reads string data from the file up to and optionally including the terminating EOL characters (can be ' ', '' or ' ') and returns the string read More...
DLLEXPORT int | readLine (QoreString &str)
| clears the string passed, then reads string data from the file up to and including the terminating EOL characters (can be ' ', '' or ' '), returns 0 for no error, -1 for EOF, -2 for file not opened More...
DLLEXPORT int | readLine (QoreString &str, bool incl_eol)
| clears the string passed, then reads string data from the file up to and optionally including the terminating EOL characters (can be ' ', '' or ' '), returns 0 for no error, -1 for EOF, -2 for file not opened More...
DLLEXPORT int | readu1 (unsigned char *val, ExceptionSink *xsink)
| reads a 1-byte unsigned integer from the file and returns the value read as an output parameter More...
DLLEXPORT int | readu2 (unsigned short *val, ExceptionSink *xsink)
| reads a 2-byte unsigned integer from the file in MSB (Most Significant Byte first, big endian) format and returns the value read as an output parameter More...
DLLEXPORT int | readu2LSB (unsigned short *val, ExceptionSink *xsink)
| reads a 2-byte unsigned integer from the file in LSB (Least Significant Byte first, big endian) format and returns the value read as an output parameter More...
DLLEXPORT int | readu4 (unsigned int *val, ExceptionSink *xsink)
| reads a 4-byte unsigned integer from the file in MSB (Most Significant Byte first, big endian) format and returns the value read as an output parameter More...
DLLEXPORT int | readu4LSB (unsigned int *val, ExceptionSink *xsink)
| reads a 4-byte unsigned integer from the file in LSB (Least Significant Byte first, big endian) format and returns the value read as an output parameter More...
DLLEXPORT QoreStringNode * | readUntil (const char *bytes, bool incl_bytes, ExceptionSink *xsink)
| reads string data from the file up to and optionally including the terminating EOL characters passed as an argument and returns the string read More...
DLLEXPORT int | readUntil (char byte, QoreString &str, bool incl_bytes=true)
| clears the string passed, then reads string data from the file up to a terminating byte value, returns 0 for no error, -1 for EOF, -2 for file not opened More...
DLLEXPORT int | readUntil (const char *bytes, QoreString &str, bool incl_bytes=true)
| clears the string passed, then reads string data from the file up to the given byte string, returns 0 for no error, -1 for EOF, -2 for file not opened More...
DLLEXPORT void | setEncoding (const QoreEncoding *cs)
| sets the encoding for the file
DLLLOCAL void | setEventQueue (Queue *cbq, ExceptionSink *xsink)
| sets the event queue (not part of the library's pubilc API), must be already referenced before call
DLLEXPORT qore_size_t | setPos (qore_size_t pos)
| sets the absolute file position to "pos" More...
DLLLOCAL int | setTerminalAttributes (int action, QoreTermIOS *ios, ExceptionSink *xsink) const
| sets terminal attributes
DLLEXPORT QoreListNode * | stat (ExceptionSink *xsink) const
| returns a QoreListNode with file status information More...
DLLEXPORT QoreHashNode * | statvfs (ExceptionSink *xsink) const
| returns a QoreHashNode with filesystem status information More...
DLLEXPORT int | sync ()
| flushes the write buffer to disk
DLLEXPORT int | write (const QoreString *str, ExceptionSink *xsink)
| writes string data to the file, character encoding is converted if necessary, and returns the number of bytes written More...
DLLEXPORT int | write (const BinaryNode *b, ExceptionSink *xsink)
| writes binary data to the file and returns the number of bytes written More...
DLLEXPORT int | write (const void *data, qore_size_t len, ExceptionSink *xsink)
| writes binary data to the file and returns the number of bytes written More...
DLLEXPORT int | writei1 (char i, ExceptionSink *xsink)
| writes 1-byte binary integer data to the file and returns the number of bytes written (normally 1) More...
DLLEXPORT int | writei2 (short i, ExceptionSink *xsink)
| writes 2-byte (16bit) binary integer data in MSB (Most Significant Byte first, big endian) format to the file and returns the number of bytes written (normally 2) More...
DLLEXPORT int | writei2LSB (short i, ExceptionSink *xsink)
| writes 2-byte (16bit) binary integer data in LSB (Least Significant Byte first, little endian) format to the file and returns the number of bytes written (normally 2) More...
DLLEXPORT int | writei4 (int i, ExceptionSink *xsink)
| writes 4-byte (32bit) binary integer data in MSB (Most Significant Byte first, big endian) format to the file and returns the number of bytes written (normally 4) More...
DLLEXPORT int | writei4LSB (int i, ExceptionSink *xsink)
| writes 4-byte (32bit) binary integer data in LSB (Least Significant Byte first, little endian)format to the file and returns the number of bytes written (normally 4) More...
DLLEXPORT int | writei8 (int64 i, ExceptionSink *xsink)
| writes 8-byte (64bit) binary integer data in MSB (Most Significant Byte first, big endian) format to the file and returns the number of bytes written (normally 8) More...
DLLEXPORT int | writei8LSB (int64 i, ExceptionSink *xsink)
| writes 8-byte (64bit) binary integer data in LSB (Least Significant Byte first, little endian) format to the file and returns the number of bytes written (normally 8) More...

## Protected Member Functions
DLLLOCAL | QoreFile (const QoreFile &)
| this function is not implemented; it is here as a private function in order to prohibit it from being used
DLLLOCAL QoreFile & | operator= (const QoreFile &)
| this function is not implemented; it is here as a private function in order to prohibit it from being used

## Detailed Description

provides controlled access to file data through Qore data structures

Each file has a default character encoding associated with it. String data read from the file will be tagged with this encoding. String data written to the file will be converted to this encoding if necessary before written.

See Also
  QoreEncoding

## Member Function Documentation

DLLEXPORT int QoreFile::close | ( |  | ) |

closes the file

Returns
  0 for success, non-zero for error

DLLEXPORT QoreStringNode* QoreFile::getchar | ( |  | ) |

reads a single byte from the file and returns it as a new string, caller owns the reference count returned

note that this function is not guaranteed to read a character if the File's encoding is a multi-byte character encoding

Returns
  a new string consisting of the single character read from the file; can return 0 if an error occurs

DLLEXPORT QoreStringNode* QoreFile::getchar | ( | ExceptionSink * | xsink | ) |

reads a single character from the file and returns it as a new string, caller owns the reference count returned

This function will return a single character in the File's encoding even for multi-byte character encodings. However, a Qore-language exception will be thrown if invalid character data is read from the file (only thrown for multi-byte encodings).

Parameters

  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  a new string consisting of the single character read from the file

DLLEXPORT qore_size_t QoreFile::getPos | ( |  | ) |

returns the absolute byte position in the file

Returns
  the absolute byte position in the file

Deprecated:
  : only the const variant will remain in the future

DLLEXPORT qore_size_t QoreFile::getPos | ( |  | ) | const

returns the absolute byte position in the file

Returns
  the absolute byte position in the file

DLLEXPORT QoreHashNode* QoreFile::hstat | ( | ExceptionSink * | xsink | ) | const

returns a QoreHashNode with file status information

Parameters

  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  a QoreHashNode with file status information

DLLEXPORT bool QoreFile::isDataAvailable | ( | int | timeout_ms,
|  | ExceptionSink * | xsink
| ) |  | const

returns true if data is available for the file descriptor

Parameters

  timeout_ms | the maximum time to read a single block from the file; -1 = never timeout, 0 timeout immediately if no data is available
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  true if data is available in the timeout period, false if not

DLLEXPORT int QoreFile::open | ( | const char * | fn,
|  | int | flags = `O_RDONLY`,
|  | int | mode = `0777`,
|  | const QoreEncoding * | cs = `QCS_DEFAULT`
| ) |  |

opens the file and returns 0 for success, non-zero for error

Parameters

  fn | the file name to open
  flags | the flags to use when opening the file
  mode | the mode mask to use when opening the file
  cs | the encoding to use for the file

Returns
  0 for success, non-zero for error

Note
  for a version that raises a Qore-language exception when an error occurs opening the file, see QoreFile::open2()

See Also
  QoreFile::open2()

DLLEXPORT int QoreFile::open2 | ( | ExceptionSink * | xsink,
|  | const char * | fn,
|  | int | flags = `O_RDONLY`,
|  | int | mode = `0777`,
|  | const QoreEncoding * | cs = `QCS_DEFAULT`
| ) |  |

opens the file and raises a Qore-language exception if an error occurs

Parameters

  xsink | if an error occurs when opening the file, the Qore-language exception info will be added here
  fn | the file name to open
  flags | the flags to use when opening the file
  mode | the mode mask to use when opening the file
  cs | the encoding to use for the file

Returns
  0 for success, non-zero for error, meaning that an exception was raised

Note
  for a version that does not raise a Qore exception when errors occur, see QoreFile::open2()

See Also
  QoreFile::open()

DLLEXPORT QoreStringNode* QoreFile::read | ( | qore_offset_t | size,
|  | ExceptionSink * | xsink
| ) |  |

reads string data from the file and returns the string read (caller owns the reference count returned)

A Qore-language exception can be thrown if the file is not opened

Parameters

  size | the number of bytes to read from the file, use -1 to read all data from the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  the string read (caller owns the reference count returned) or 0 if an error occured

Note
  the string will be tagged with the file's default encoding

DLLEXPORT int QoreFile::read | ( | QoreString & | str,
|  | qore_offset_t | size,
|  | ExceptionSink * | xsink
| ) |  |

reads string data from the file into a QoreString object (or subclass, such as QoreStringNode) and returns 0 for OK or non-zero for error

A Qore-language exception can be thrown if the file is not opened

Parameters

  str | the data read will be placed here
  size | the number of bytes to read from the file, use -1 to read all data from the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  0 for OK or non-zero for error

Note
  the string will be tagged with the file's default encoding

DLLEXPORT QoreStringNode* QoreFile::read | ( | qore_offset_t | size,
|  | int | timeout_ms,
|  | ExceptionSink * | xsink
| ) |  |

reads string data from the file and returns the string read (caller owns the reference count returned)

A Qore-language exception can be thrown if the file is not opened

Parameters

  size | the number of bytes to read from the file, use -1 to read all data from the file
  timeout_ms | the maximum time to read a single block from the file; -1 = never timeout, 0 timeout immediately if no data is available
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  the string read (caller owns the reference count returned) or 0 if an error occured

Note
  the string will be tagged with the file's default encoding

DLLEXPORT BinaryNode* QoreFile::readBinary | ( | qore_offset_t | size,
|  | ExceptionSink * | xsink
| ) |  |

reads binary data from the file and returns the data read (caller owns the reference count returned)

A Qore-language exception can be thrown if the file is not opened

Parameters

  size | the number of bytes to read from the file, use -1 to read all data from the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  the binary data read (caller owns the reference count returned) or 0 if an error occured

DLLEXPORT int QoreFile::readBinary | ( | BinaryNode & | b,
|  | qore_offset_t | size,
|  | ExceptionSink * | xsink
| ) |  |

reads binary data from the file into a BinaryNode object and returns 0 for OK or non-zero for error

A Qore-language exception can be thrown if the file is not opened

Parameters

  b | the data read will be placed here
  size | the number of bytes to read from the file, use -1 to read all data from the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  0 for OK or non-zero for error

DLLEXPORT BinaryNode* QoreFile::readBinary | ( | qore_offset_t | size,
|  | int | timeout_ms,
|  | ExceptionSink * | xsink
| ) |  |

reads binary data from the file and returns the data read (caller owns the reference count returned)

A Qore-language exception can be thrown if the file is not opened

Parameters

  size | the number of bytes to read from the file, use -1 to read all data from the file
  timeout_ms | the maximum time to read a single block from the file; -1 = never timeout, 0 timeout immediately if no data is available
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  the binary data read (caller owns the reference count returned) or 0 if an error occured

DLLEXPORT int QoreFile::readi1 | ( | char * | val,
|  | ExceptionSink * | xsink
| ) |  |

reads a 1-byte signed integer from the file and returns the value read as an output parameter

A Qore-language exception can be thrown if the file is not opened

Parameters

  val | output parameter: the integer value read from the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  0 for OK, -1 for error

See Also
  QoreFile::readi1()

DLLEXPORT int QoreFile::readi2 | ( | short * | val,
|  | ExceptionSink * | xsink
| ) |  |

reads a 2-byte signed integer from the file in MSB (Most Significant Byte first, big endian) format and returns the value read as an output parameter

A Qore-language exception can be thrown if the file is not opened

Parameters

  val | output parameter: the integer value read from the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  0 for OK, -1 for error

See Also
  QoreFile::readi2LSB()
  QoreFile::readu2()
  QoreFile::readu2LSB()

DLLEXPORT int QoreFile::readi2LSB | ( | short * | val,
|  | ExceptionSink * | xsink
| ) |  |

reads a 2-byte signed integer from the file in LSB (Least Significant Byte first, big endian) format and returns the value read as an output parameter

A Qore-language exception can be thrown if the file is not opened

Parameters

  val | output parameter: the integer value read from the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  0 for OK, -1 for error

See Also
  QoreFile::readi2()
  QoreFile::readu2()
  QoreFile::readu2LSB()

DLLEXPORT int QoreFile::readi4 | ( | int * | val,
|  | ExceptionSink * | xsink
| ) |  |

reads a 4-byte signed integer from the file in MSB (Most Significant Byte first, big endian) format and returns the value read as an output parameter

A Qore-language exception can be thrown if the file is not opened

Parameters

  val | output parameter: the integer value read from the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  0 for OK, -1 for error

See Also
  QoreFile::readi4LSB()
  QoreFile::readu4LSB()
  QoreFile::readu4()

DLLEXPORT int QoreFile::readi4LSB | ( | int * | val,
|  | ExceptionSink * | xsink
| ) |  |

reads a 4-byte signed integer from the file in LSB (Least Significant Byte first, big endian) format and returns the value read as an output parameter

A Qore-language exception can be thrown if the file is not opened

Parameters

  val | output parameter: the integer value read from the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  0 for OK, -1 for error

See Also
  QoreFile::readi4()
  QoreFile::readu4LSB()
  QoreFile::readu4()

DLLEXPORT int QoreFile::readi8 | ( | int64 * | val,
|  | ExceptionSink * | xsink
| ) |  |

reads an 8-byte signed integer from the file in MSB (Most Significant Byte first, big endian) format and returns the value read as an output parameter

A Qore-language exception can be thrown if the file is not opened

Parameters

  val | output parameter: the integer value read from the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  0 for OK, -1 for error

See Also
  QoreFile::readi8LSB()

DLLEXPORT int QoreFile::readi8LSB | ( | int64 * | val,
|  | ExceptionSink * | xsink
| ) |  |

reads an 8-byte signed integer from the file in LSB (Least Significant Byte first, big endian) format and returns the value read as an output parameter

A Qore-language exception can be thrown if the file is not opened

Parameters

  val | output parameter: the integer value read from the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  0 for OK, -1 for error

See Also
  QoreFile::readi8()

DLLEXPORT QoreStringNode* QoreFile::readLine | ( | ExceptionSink * | xsink | ) |

reads string data from the file up to and including the terminating EOL characters (can be `"\n"`, `"\r"` or `"\r\n"`) and returns the string read with the EOL characters

if an error occurs (file is not open), a Qore-language exception is raised

Parameters

  xsink | if an error occurs when opening the file, the Qore-language exception info will be added here

Returns
  the string read including the terminating EOL characters (if any - if EOF is encountered then there may not be any) or 0 if there is an error or no data could be read. caller owns the reference count returned

See Also
  QoreFile::readUntil()

DLLEXPORT QoreStringNode* QoreFile::readLine | ( | bool | incl_eol,
|  | ExceptionSink * | xsink
| ) |  |

reads string data from the file up to and optionally including the terminating EOL characters (can be '
', '' or '
') and returns the string read

if an error occurs (file is not open), a Qore-language exception is raised

Parameters

  incl_eol | if this parameter is true, then the EOL character(s) read will be written to the string, if false, then they are not
  xsink | if an error occurs when opening the file, the Qore-language exception info will be added here

Returns
  the string read including the terminating EOL characters (if any - if EOF is encountered then there may not be any) or 0 if there is an error or no data could be read. caller owns the reference count returned

See Also
  QoreFile::readUntil()

DLLEXPORT int QoreFile::readLine | ( | QoreString & | str | ) |

clears the string passed, then reads string data from the file up to and including the terminating EOL characters (can be '
', '' or '
'), returns 0 for no error, -1 for EOF, -2 for file not opened

Note
  string data will be appended to the string with the assumption that the string's encoding is the same as the file's

Parameters

  str | the string container that will have the line from the file written into

Returns
  0 for no error, -1 for EOF, -2 for file not opened

See Also
  QoreFile::readUntil()

DLLEXPORT int QoreFile::readLine | ( | QoreString & | str,
|  | bool | incl_eol
| ) |  |

clears the string passed, then reads string data from the file up to and optionally including the terminating EOL characters (can be '
', '' or '
'), returns 0 for no error, -1 for EOF, -2 for file not opened

Note
  string data will be appended to the string with the assumption that the string's encoding is the same as the file's

Parameters

  str | the string container that will have the line from the file written into
  incl_eol | if this parameter is true, then the EOL character(s) read will be written to the string, if false, then they are not

Returns
  0 for no error, -1 for EOF, -2 for file not opened

See Also
  QoreFile::readUntil()

DLLEXPORT int QoreFile::readu1 | ( | unsigned char * | val,
|  | ExceptionSink * | xsink
| ) |  |

reads a 1-byte unsigned integer from the file and returns the value read as an output parameter

A Qore-language exception can be thrown if the file is not opened

Parameters

  val | output parameter: the integer value read from the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  0 for OK, -1 for error

See Also
  QoreFile::readi1()

DLLEXPORT int QoreFile::readu2 | ( | unsigned short * | val,
|  | ExceptionSink * | xsink
| ) |  |

reads a 2-byte unsigned integer from the file in MSB (Most Significant Byte first, big endian) format and returns the value read as an output parameter

A Qore-language exception can be thrown if the file is not opened

Parameters

  val | output parameter: the integer value read from the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  0 for OK, -1 for error

See Also
  QoreFile::readi2LSB()
  QoreFile::readi2()
  QoreFile::readi2LSB()

DLLEXPORT int QoreFile::readu2LSB | ( | unsigned short * | val,
|  | ExceptionSink * | xsink
| ) |  |

reads a 2-byte unsigned integer from the file in LSB (Least Significant Byte first, big endian) format and returns the value read as an output parameter

A Qore-language exception can be thrown if the file is not opened

Parameters

  val | output parameter: the integer value read from the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  0 for OK, -1 for error

See Also
  QoreFile::readu2()
  QoreFile::readi2()
  QoreFile::readi2LSB()

DLLEXPORT int QoreFile::readu4 | ( | unsigned int * | val,
|  | ExceptionSink * | xsink
| ) |  |

reads a 4-byte unsigned integer from the file in MSB (Most Significant Byte first, big endian) format and returns the value read as an output parameter

A Qore-language exception can be thrown if the file is not opened

Parameters

  val | output parameter: the integer value read from the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  0 for OK, -1 for error

See Also
  QoreFile::readu4LSB()
  QoreFile::readi4LSB()
  QoreFile::readi4()

DLLEXPORT int QoreFile::readu4LSB | ( | unsigned int * | val,
|  | ExceptionSink * | xsink
| ) |  |

reads a 4-byte unsigned integer from the file in LSB (Least Significant Byte first, big endian) format and returns the value read as an output parameter

A Qore-language exception can be thrown if the file is not opened

Parameters

  val | output parameter: the integer value read from the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  0 for OK, -1 for error

See Also
  QoreFile::readu4()
  QoreFile::readi4LSB()
  QoreFile::readi4()

DLLEXPORT QoreStringNode* QoreFile::readUntil | ( | const char * | bytes,
|  | bool | incl_bytes,
|  | ExceptionSink * | xsink
| ) |  |

reads string data from the file up to and optionally including the terminating EOL characters passed as an argument and returns the string read

if an error occurs (file is not open), a Qore-language exception is raised

Parameters

  bytes | the end of line characters that separate lines
  incl_bytes | if this parameter is true, then the EOL character(s) read will be written to the string, if false, then they are not
  xsink | if an error occurs when opening the file, the Qore-language exception info will be added here

Returns
  the string read including the terminating EOL characters (if any - if EOF is encountered then there may not be any) or 0 if there is an error or no data could be read. caller owns the reference count returned

See Also
  QoreFile::readLine()

DLLEXPORT int QoreFile::readUntil | ( | char | byte,
|  | QoreString & | str,
|  | bool | incl_bytes = `true`
| ) |  |

clears the string passed, then reads string data from the file up to a terminating byte value, returns 0 for no error, -1 for EOF, -2 for file not opened

Note
  string data will be appended to the string with the assumption that the string's encoding is the same as the file's

Parameters

  byte | the end of line byte
  str | the string to write the line read into
  incl_bytes | if this parameter is true, then the EOL character(s) read will be written to the string, if false, then they are not

Returns
  0 for no error, -1 for EOF, -2 for file not opened

See Also
  QoreFile::readLine()

DLLEXPORT int QoreFile::readUntil | ( | const char * | bytes,
|  | QoreString & | str,
|  | bool | incl_bytes = `true`
| ) |  |

clears the string passed, then reads string data from the file up to the given byte string, returns 0 for no error, -1 for EOF, -2 for file not opened

Parameters

  bytes | the byte string giving the end of the data to read
  str | the string where the data read will be stored in (this string must already be tagged with the QoreFile's encoding)
  incl_bytes | include "bytes" in the string

Note
  string data will be appended to the string with the assumption that the string's encoding is the same as the file's

Returns
  0 for no error, -1 for EOF, -2 for file not opened

See Also
  QoreFile::readLine()

DLLEXPORT qore_size_t QoreFile::setPos | ( | qore_size_t | pos | ) |

sets the absolute file position to "pos"

Parameters

  pos | the file position in bytes to set (starting with byte position 0)

DLLEXPORT QoreListNode* QoreFile::stat | ( | ExceptionSink * | xsink | ) | const

returns a QoreListNode with file status information

Parameters

  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  a QoreListNode with file status information

DLLEXPORT QoreHashNode* QoreFile::statvfs | ( | ExceptionSink * | xsink | ) | const

returns a QoreHashNode with filesystem status information

Parameters

  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  a QoreHashNode with filesystem status information

DLLEXPORT int QoreFile::write | ( | const QoreString * | str,
|  | ExceptionSink * | xsink
| ) |  |

writes string data to the file, character encoding is converted if necessary, and returns the number of bytes written

Qore-language exceptions can be thrown if the file is not opened or if encoding conversion fails

Parameters

  str | the string to write to the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  returns the number of bytes written (-1 if an exception was thrown)

DLLEXPORT int QoreFile::write | ( | const BinaryNode * | b,
|  | ExceptionSink * | xsink
| ) |  |

writes binary data to the file and returns the number of bytes written

Qore-language exceptions can be thrown if the file is not opened

Parameters

  b | the binary data to write the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  returns the number of bytes written (-1 if an exception was thrown)

DLLEXPORT int QoreFile::write | ( | const void * | data,
|  | qore_size_t | len,
|  | ExceptionSink * | xsink
| ) |  |

writes binary data to the file and returns the number of bytes written

Qore-language exceptions can be thrown if the file is not opened

Parameters

  data | the data to write to the file
  len | the length of data to write to the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  returns the number of bytes written (-1 if an exception was thrown)

DLLEXPORT int QoreFile::writei1 | ( | char | i,
|  | ExceptionSink * | xsink
| ) |  |

writes 1-byte binary integer data to the file and returns the number of bytes written (normally 1)

Qore-language exceptions can be thrown if the file is not opened

Parameters

  i | the 1-byte integer to write to the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  returns the number of bytes written (-1 if an exception was thrown)

DLLEXPORT int QoreFile::writei2 | ( | short | i,
|  | ExceptionSink * | xsink
| ) |  |

writes 2-byte (16bit) binary integer data in MSB (Most Significant Byte first, big endian) format to the file and returns the number of bytes written (normally 2)

Qore-language exceptions can be thrown if the file is not opened

Parameters

  i | the integer to write to the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  returns the number of bytes written (-1 if an exception was thrown)

See Also
  Qorefile::writei2LSB()

DLLEXPORT int QoreFile::writei2LSB | ( | short | i,
|  | ExceptionSink * | xsink
| ) |  |

writes 2-byte (16bit) binary integer data in LSB (Least Significant Byte first, little endian) format to the file and returns the number of bytes written (normally 2)

Qore-language exceptions can be thrown if the file is not opened

Parameters

  i | the integer to write to the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  returns the number of bytes written (-1 if an exception was thrown)

See Also
  Qorefile::writei2()

DLLEXPORT int QoreFile::writei4 | ( | int | i,
|  | ExceptionSink * | xsink
| ) |  |

writes 4-byte (32bit) binary integer data in MSB (Most Significant Byte first, big endian) format to the file and returns the number of bytes written (normally 4)

Qore-language exceptions can be thrown if the file is not opened

Parameters

  i | the integer to write to the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  returns the number of bytes written (-1 if an exception was thrown)

See Also
  Qorefile::writei4LSB()

DLLEXPORT int QoreFile::writei4LSB | ( | int | i,
|  | ExceptionSink * | xsink
| ) |  |

writes 4-byte (32bit) binary integer data in LSB (Least Significant Byte first, little endian)format to the file and returns the number of bytes written (normally 4)

Qore-language exceptions can be thrown if the file is not opened

Parameters

  i | the integer to write to the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  returns the number of bytes written (-1 if an exception was thrown)

See Also
  Qorefile::writei4()

DLLEXPORT int QoreFile::writei8 | ( | int64 | i,
|  | ExceptionSink * | xsink
| ) |  |

writes 8-byte (64bit) binary integer data in MSB (Most Significant Byte first, big endian) format to the file and returns the number of bytes written (normally 8)

Qore-language exceptions can be thrown if the file is not opened

Parameters

  i | the integer to write to the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  returns the number of bytes written (-1 if an exception was thrown)

See Also
  Qorefile::writei4LSB()

DLLEXPORT int QoreFile::writei8LSB | ( | int64 | i,
|  | ExceptionSink * | xsink
| ) |  |

writes 8-byte (64bit) binary integer data in LSB (Least Significant Byte first, little endian) format to the file and returns the number of bytes written (normally 8)

Qore-language exceptions can be thrown if the file is not opened

Parameters

  i | the integer to write to the file
  xsink | if an error occurs, the Qore-language exception info will be added here

Returns
  returns the number of bytes written (-1 if an exception was thrown)

See Also
  Qorefile::writei4()

The documentation for this class was generated from the following file:

- include/qore/QoreFile.h (6086)