|
Input file stream class
ifstream provides an interface to read data from files as input streams.
The objects of this class maintain internally a pointer to a filebuf object that can be obtained by calling member rdbuf.
The file to be associated with the stream can be specified either as a parameter in the constructor or by calling member open.
After all necessary operations on a file have been performed, it can be closed (or disassociated) by calling member close. Once closed, the same file stream object may be used to open another file.
The member function is_open can be used to determine whether the stream object is currently associated with a file.
Public members
| (constructor) | Construct object and optionally open file (constructor member) |
| rdbuf | Get the associated filebuf object (public member function) |
| is_open | Check if a file is open (public member function) |
| open | Open file (public member function) |
| close | Close file (public member function) |
Members inherited from istream
| operator>> | Extract formatted data (public member function) |
| gcount | Get number of characters extracted by last unformatted input operation (public member function) |
| get | Get unformatted data from stream (public member function) |
| getline | Get line from stream (public member function) |
| ignore | Extract and discard characters (public member functions) |
| peek | Peek next character (public member function) |
| read | Read block of data (public member function) |
| readsome | Read block of data available in the buffer (public member function) |
| putback | Put character back (public member function) |
| unget | Decrement get pointer (public member function) |
| tellg | Get position of the get pointer. (public member function) |
| seekg | Set position of the get pointer (public member function) |
| sync | Synchronize input buffer with source of characters (public member function) |
| sentry | Perform exception safe prefix/suffix operations (public member class) |
Member functions inherited from ios
| good | Check if the state of the stream is good for i/o operations. (public member function) |
| eof | Check if eofbit is set (public member function) |
| fail | Check if either failbit or badbit is set (public member function) |
| bad | Check if badbit is set (public member function) |
| operator! | Evaluate stream object (public member function) |
| rdstate | Get error state flags (public member function) |
| setstate | Set error state flag (public member function) |
| clear | Set error state flags (public member function) |
| copyfmt | Copy formatting information (public member functions) |
| fill | Get/set the fill character (public member function) |
| exceptions | Get/set exception mask (public member function) |
| imbue | Imbue locale (public member function) |
| tie | Get/set the tied stream (public member function) |
| narrow | Narrow character (public member function) |
| widen | Widen character (public member function) |
Member functions inherited from ios_base
| flags | Get/set format flags (public member function) |
| setf | Set specific format flags (public member function) |
| unsetf | Clear specific format flags (public member function) |
| precision | Get/Set floating-point decimal precision (public member function) |
| width | Get/set field width (public member function) |
| imbue | Imbue locale (public member function) |
| getloc | Get current locale (public member function) |
| xalloc | Return a new index for the internal extensible array [static] (public static member function) |
| iword | Get reference to integer element of the internal extensible array (public member function) |
| pword | Get reference to pointer of the internal extensible array (public member function) |
| sync_with_stdio | Activate/deactivate synchronization of iostream and cstdio streams [static] (public static member function) |
|
