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Returns a pointer to the first element of the array with the portion of the controlled input sequence that is currently buffered.
Members function can access this array directly; It is described by the pointers returned by the following protected member functions:
Concurrent access to the same stream buffer object may cause data races.
Reference
C library:
- <cassert> (assert.h)
- <cctype> (ctype.h)
- <cerrno> (errno.h)
-
<cfenv> (fenv.h)C++11
- <cfloat> (float.h)
-
<cinttypes> (inttypes.h)C++11
- <ciso646> (iso646.h)
- <climits> (limits.h)
- <clocale> (locale.h)
- <cmath> (math.h)
- <csetjmp> (setjmp.h)
- <csignal> (signal.h)
- <cstdarg> (stdarg.h)
-
<cstdbool> (stdbool.h)C++11
- <cstddef> (stddef.h)
-
<cstdint> (stdint.h)C++11
- <cstdio> (stdio.h)
- <cstdlib> (stdlib.h)
- <cstring> (string.h)
-
<ctgmath> (tgmath.h)C++11
- <ctime> (time.h)
-
<cuchar> (uchar.h)C++11
- <cwchar> (wchar.h)
- <cwctype> (wctype.h)
Containers:
-
<array>C++11
- <deque>
-
<forward_list>C++11
- <list>
- <map>
- <queue>
- <set>
- <stack>
-
<unordered_map>C++11
-
<unordered_set>C++11
- <vector>
-
Input/Output:
Multi-threading:
-
<atomic>C++11
-
<condition_variable>C++11
-
<future>C++11
-
<mutex>C++11
-
<thread>C++11
-
Other:
- <algorithm>
- <bitset>
-
<chrono>C++11
-
<codecvt>C++11
- <complex>
- <exception>
- <functional>
-
<initializer_list>C++11
- <iterator>
- <limits>
- <locale>
- <memory>
- <new>
- <numeric>
-
<random>C++11
-
<ratio>C++11
-
<regex>C++11
- <stdexcept>
- <string>
-
<system_error>C++11
-
<tuple>C++11
-
<type_traits>C++11
-
<typeindex>C++11
- <typeinfo>
- <utility>
- <valarray>
streambuf
- streambuf::~streambuf
- streambuf::streambuf
public members
protected members
virtual protected members
- Reference
- <streambuf>
- streambuf
- eback
protected member function
<streambuf> <iostream>
std::streambuf::eback
char* eback() const;
Pointer to beginning of input sequence
Members function can access this array directly; It is described by the pointers returned by the following protected member functions:
| member | descritpion |
|---|---|
| eback() | Beginning of the buffered part of the input sequence |
| gptr() | Current position in the input sequence ("get pointer") |
| egptr() | End of the buffered part of the input sequence |
Parameters
noneReturn Value
A pointer to the beginning of an array with the part of the controlled input sequence that is currently buffered.Data races
Accesses the stream buffer object.Concurrent access to the same stream buffer object may cause data races.
Exception safety
Strong guarantee: if an exception is thrown, there are no changes in the stream buffer.See also
- streambuf::gptr
- Pointer to current position of input sequence (protected member function)
- streambuf::egptr
- Pointer to end of input sequence (protected member function)
- streambuf::pbase
- Pointer to beginning of output sequence (protected member function)
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Spotted an error? contact us