#include <Pt/IOStream.h>
Input stream over a BasicStreamBuffer. More...
Inherited by BasicTextIStream< Char, char >, and BasicTextIStream< CharT, ByteT >.
Public Member Functions | |
| BasicIStream (BasicStreamBuffer< CharT > *sb=0) | |
| Constructor. | |
| ~BasicIStream () | |
| Destructor. | |
| std::streamsize | peeksome (CharT *buffer, std::streamsize n) |
| Peeks bytes in the stream buffer. | |
| BasicStreamBuffer< CharT > * | buffer () |
| Returns the buffer. | |
| void | setBuffer (BasicStreamBuffer< CharT > *sb) |
| Sets the buffer. | |
BasicIStream is the input stream in the Streams model. It is a std::basic_istream that holds a BasicStreamBuffer pointer. Extraction uses that buffer through rdbuf(). peeksome() looks ahead by more than one character: it calls BasicStreamBuffer::speekn() when rdbuf() is still this buffer, and otherwise peeks a single character. The returned count may be less than requested.
buffer() returns the pointer. setBuffer() replaces it and updates rdbuf(). The stream does not own the buffer. Pass a null buffer to construct a stream that will receive one later.
| std::streamsize peeksome | ( | CharT * | buffer, |
| std::streamsize | n ) |
The number of bytes that can be peeked depends on the current stream buffer get area and maybe less than requested, similar to istream::readsome().