Library: Foundation
Package: Streams
Header: Poco/FileStream.h
Description
A stream for reading from and writing to a file.
Files are always opened in binary mode, a text mode with CR-LF translation is not supported. Thus, the file is always opened as if the std::ios::binary flag was specified. Use an InputLineEndingConverter or OutputLineEndingConverter if you require CR-LF translation.
A seek (seekg() or seekp()) operation will always set the read position and the write position simultaneously to the same value.
On Windows platforms, UTF-8 encoded Unicode paths are correctly handled.
Inheritance
Direct Base Classes: FileIOS, std::iostream
All Base Classes: FileIOS, std::ios, std::iostream
Member Summary
Member Functions: open
Inherited Functions: close, flushToDisk, nativeHandle, open, openHandle, rdbuf, size
Constructors
FileStream
FileStream();
Creats an unopened FileStream.
FileStream
FileStream(
const std::string & path,
std::ios::openmode mode = std::ios::out | std::ios::in
);
Creates the FileStream for the file given by path, using the given mode.
NOTE: The default mode std::ios::in | std::ios::out is different from the default for std::fstream, which is std::ios::out only. This is for backwards compatibility with earlier POCO versions.
Destructor
~FileStream
~FileStream() override;
Destroys the FileOutputStream.
Member Functions
open 
void open(
const std::string & path,
std::ios::openmode mode = std::ios::out | std::ios::in
) override;
Opens the file specified by path, using the given mode.
Throws a FileException (or a similar exception) if the file does not exist or is not accessible for other reasons and a new file cannot be created.
See also: Poco::FileIOS::open()