ostrstream(3C++) - ostrstream(3C++)
Standard C++ Library Copyright 1998, Rogue Wave Software, Inc.
NAMEostrstream
- Writes to an array in memory.
SYNOPSIS
#include <strstream>
class ostrstream
: public basic_ostream<char>
DESCRIPTION
The class ostrstream writes to an array in memory. It uses a private
strstreambuf_object to control the associated array object. It inherits
from basic_ostream<char> and therefore can use all the formatted and
unformatted output functions.
This is a deprecated feature and might not be available in future ver‐
sions.
INTERFACE
class ostrstream
: public basic_ostream<char> {
public:
typedef char_traits<char> traits;
typedef char char_type;
typedef typename traits::int_type int_type;
typedef typename traits::pos_type pos_type;
typedef typename traits::off_type off_type;
ostrstream();
ostrstream(char *s, int n,
ios_base::openmode = ios_base::out);
virtual ~ostrstream();
strstreambuf *rdbuf() const;
void freeze(int freezefl = 1);
char *str();
int pcount() const;
};
TYPES
char_type
The type char_type is a synonym of type char.
int_type
The type int_type is a synonym of type traits::in_type.
off_type
The type off_type is a synonym of type traits::off_type.
pos_type
The type pos_type is a synonym of type traits::pos_type.
traits
The type traits is a synonym of type char_traits<char>.
CONSTRUCTORSostrstream();
Constructs an object of class ostrstream, initializing the base class
basic_ostream<char> with the associated strstreambuf object. The strstream‐
buf object is initialized by calling its default constructor strstream‐
buf().
ostrstream(char* s, int n, ios_base::openmode
mode = ios_base::out);
Constructs an object of class ostrstream, initializing the base class
basic_ostream<char> with the associated strstreambuf object. The strstream‐
buf object is initialized by calling one of two constructors:
- If mode & app == 0, it calls strstreambuf(s,n,s)
- Otherwise it calls strstreambuf(s,n,s + ::strlen(s)).RE
DESTRUCTORSvirtual ~ostrstream();
Destroys an object of class ostrstream.
MEMBER FUNCTIONS
void
freeze(bool freezefl = 1);
If the mode is dynamic, alters the freeze status of the dynamic array
object as follows:
- If freezefl is false, the function sets the freeze status to
frozen.
- Otherwise, it clears the freeze status..RE
intpcount() const;
Returns the size of the output sequence.
strstreambuf*rdbuf() const;
Returns a pointer to the private strstreambuf object associated with the
stream.
char*str();
Returns a pointer to the underlying array object, which may be null.
EXAMPLE
See strstream, istrstream and strstreambuf examples.
SEE ALSO
char_traits(3C++), ios_base(3C++), basic_ios(3C++), strstreambuf(3C++),
istrstream(3C++), strstream(3C++)
Working Paper for Draft Proposed International Standard for Information
Systems--Programming Language C++, Annex D Compatibility features Sec‐
tion D.6.3
STANDARDS CONFORMANCE
ANSI X3J16/ISO WG21 Joint C++ Committee
Rogue Wave Software 02 Apr 1998 ostrstream(3C++)