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llvm-project/libcxx/include/strstream

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// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP_STRSTREAM
#define _LIBCPP_STRSTREAM
/*
strstream synopsis
class strstreambuf
: public basic_streambuf<char>
{
public:
explicit strstreambuf(streamsize alsize_arg = 0); // before C++20
strstreambuf() : strstreambuf(0) {} // C++20
explicit strstreambuf(streamsize alsize_arg); // C++20
strstreambuf(void* (*palloc_arg)(size_t), void (*pfree_arg)(void*));
strstreambuf(char* gnext_arg, streamsize n, char* pbeg_arg = nullptr);
strstreambuf(const char* gnext_arg, streamsize n);
strstreambuf(signed char* gnext_arg, streamsize n, signed char* pbeg_arg = nullptr);
strstreambuf(const signed char* gnext_arg, streamsize n);
strstreambuf(unsigned char* gnext_arg, streamsize n, unsigned char* pbeg_arg = nullptr);
strstreambuf(const unsigned char* gnext_arg, streamsize n);
strstreambuf(strstreambuf&& rhs);
strstreambuf& operator=(strstreambuf&& rhs);
virtual ~strstreambuf();
void swap(strstreambuf& rhs);
void freeze(bool freezefl = true);
char* str();
int pcount() const;
protected:
virtual int_type overflow (int_type c = EOF);
virtual int_type pbackfail(int_type c = EOF);
virtual int_type underflow();
virtual pos_type seekoff(off_type off, ios_base::seekdir way,
ios_base::openmode which = ios_base::in | ios_base::out);
virtual pos_type seekpos(pos_type sp,
ios_base::openmode which = ios_base::in | ios_base::out);
virtual streambuf* setbuf(char* s, streamsize n);
private:
typedef T1 strstate; // exposition only
static const strstate allocated; // exposition only
static const strstate constant; // exposition only
static const strstate dynamic; // exposition only
static const strstate frozen; // exposition only
strstate strmode; // exposition only
streamsize alsize; // exposition only
void* (*palloc)(size_t); // exposition only
void (*pfree)(void*); // exposition only
};
class istrstream
: public basic_istream<char>
{
public:
explicit istrstream(const char* s);
explicit istrstream(char* s);
istrstream(const char* s, streamsize n);
istrstream(char* s, streamsize n);
virtual ~istrstream();
strstreambuf* rdbuf() const;
char *str();
private:
strstreambuf sb; // exposition only
};
class ostrstream
: public basic_ostream<char>
{
public:
ostrstream();
ostrstream(char* s, int n, ios_base::openmode mode = ios_base::out);
virtual ~ostrstream();
strstreambuf* rdbuf() const;
void freeze(bool freezefl = true);
char* str();
int pcount() const;
private:
strstreambuf sb; // exposition only
};
class strstream
: public basic_iostream<char>
{
public:
// Types
typedef char char_type;
typedef char_traits<char>::int_type int_type;
typedef char_traits<char>::pos_type pos_type;
typedef char_traits<char>::off_type off_type;
// constructors/destructor
strstream();
strstream(char* s, int n, ios_base::openmode mode = ios_base::in | ios_base::out);
virtual ~strstream();
// Members:
strstreambuf* rdbuf() const;
void freeze(bool freezefl = true);
int pcount() const;
char* str();
private:
strstreambuf sb; // exposition only
};
} // std
*/
#include <__config>
#include <istream>
#include <ostream>
#include <version>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
class _LIBCPP_TYPE_VIS strstreambuf
: public streambuf
{
public:
#ifndef _LIBCPP_CXX03_LANG
strstreambuf() : strstreambuf(0) {}
explicit strstreambuf(streamsize __alsize);
#else
explicit strstreambuf(streamsize __alsize = 0);
#endif
strstreambuf(void* (*__palloc)(size_t), void (*__pfree)(void*));
strstreambuf(char* __gnext, streamsize __n, char* __pbeg = nullptr);
strstreambuf(const char* __gnext, streamsize __n);
strstreambuf(signed char* __gnext, streamsize __n, signed char* __pbeg = nullptr);
strstreambuf(const signed char* __gnext, streamsize __n);
strstreambuf(unsigned char* __gnext, streamsize __n, unsigned char* __pbeg = nullptr);
strstreambuf(const unsigned char* __gnext, streamsize __n);
#ifndef _LIBCPP_CXX03_LANG
_LIBCPP_INLINE_VISIBILITY
strstreambuf(strstreambuf&& __rhs);
_LIBCPP_INLINE_VISIBILITY
strstreambuf& operator=(strstreambuf&& __rhs);
#endif // _LIBCPP_CXX03_LANG
virtual ~strstreambuf();
void swap(strstreambuf& __rhs);
void freeze(bool __freezefl = true);
char* str();
int pcount() const;
protected:
virtual int_type overflow (int_type __c = EOF);
virtual int_type pbackfail(int_type __c = EOF);
virtual int_type underflow();
virtual pos_type seekoff(off_type __off, ios_base::seekdir __way,
ios_base::openmode __which = ios_base::in | ios_base::out);
virtual pos_type seekpos(pos_type __sp,
ios_base::openmode __which = ios_base::in | ios_base::out);
private:
typedef unsigned __mode_type;
static const __mode_type __allocated = 0x01;
static const __mode_type __constant = 0x02;
static const __mode_type __dynamic = 0x04;
static const __mode_type __frozen = 0x08;
static const streamsize __default_alsize = 4096;
__mode_type __strmode_;
streamsize __alsize_;
void* (*__palloc_)(size_t);
void (*__pfree_)(void*);
void __init(char* __gnext, streamsize __n, char* __pbeg);
};
#ifndef _LIBCPP_CXX03_LANG
inline _LIBCPP_INLINE_VISIBILITY
strstreambuf::strstreambuf(strstreambuf&& __rhs)
: streambuf(__rhs),
__strmode_(__rhs.__strmode_),
__alsize_(__rhs.__alsize_),
__palloc_(__rhs.__palloc_),
__pfree_(__rhs.__pfree_)
{
__rhs.setg(nullptr, nullptr, nullptr);
__rhs.setp(nullptr, nullptr);
}
inline _LIBCPP_INLINE_VISIBILITY
strstreambuf&
strstreambuf::operator=(strstreambuf&& __rhs)
{
if (eback() && (__strmode_ & __allocated) != 0 && (__strmode_ & __frozen) == 0)
{
if (__pfree_)
__pfree_(eback());
else
delete [] eback();
}
streambuf::operator=(__rhs);
__strmode_ = __rhs.__strmode_;
__alsize_ = __rhs.__alsize_;
__palloc_ = __rhs.__palloc_;
__pfree_ = __rhs.__pfree_;
__rhs.setg(nullptr, nullptr, nullptr);
__rhs.setp(nullptr, nullptr);
return *this;
}
#endif // _LIBCPP_CXX03_LANG
class _LIBCPP_TYPE_VIS istrstream
: public istream
{
public:
_LIBCPP_INLINE_VISIBILITY
explicit istrstream(const char* __s)
: istream(&__sb_), __sb_(__s, 0) {}
_LIBCPP_INLINE_VISIBILITY
explicit istrstream(char* __s)
: istream(&__sb_), __sb_(__s, 0) {}
_LIBCPP_INLINE_VISIBILITY
istrstream(const char* __s, streamsize __n)
: istream(&__sb_), __sb_(__s, __n) {}
_LIBCPP_INLINE_VISIBILITY
istrstream(char* __s, streamsize __n)
: istream(&__sb_), __sb_(__s, __n) {}
#ifndef _LIBCPP_CXX03_LANG
_LIBCPP_INLINE_VISIBILITY
istrstream(istrstream&& __rhs)
: istream(_VSTD::move(__rhs)),
__sb_(_VSTD::move(__rhs.__sb_))
{
istream::set_rdbuf(&__sb_);
}
_LIBCPP_INLINE_VISIBILITY
istrstream& operator=(istrstream&& __rhs)
{
istream::operator=(_VSTD::move(__rhs));
__sb_ = _VSTD::move(__rhs.__sb_);
return *this;
}
#endif // _LIBCPP_CXX03_LANG
virtual ~istrstream();
_LIBCPP_INLINE_VISIBILITY
void swap(istrstream& __rhs)
{
istream::swap(__rhs);
__sb_.swap(__rhs.__sb_);
}
_LIBCPP_INLINE_VISIBILITY
strstreambuf* rdbuf() const {return const_cast<strstreambuf*>(&__sb_);}
_LIBCPP_INLINE_VISIBILITY
char *str() {return __sb_.str();}
private:
strstreambuf __sb_;
};
class _LIBCPP_TYPE_VIS ostrstream
: public ostream
{
public:
_LIBCPP_INLINE_VISIBILITY
ostrstream()
: ostream(&__sb_) {}
_LIBCPP_INLINE_VISIBILITY
ostrstream(char* __s, int __n, ios_base::openmode __mode = ios_base::out)
: ostream(&__sb_),
__sb_(__s, __n, __s + (__mode & ios::app ? _VSTD::strlen(__s) : 0))
{}
#ifndef _LIBCPP_CXX03_LANG
_LIBCPP_INLINE_VISIBILITY
ostrstream(ostrstream&& __rhs)
: ostream(_VSTD::move(__rhs)),
__sb_(_VSTD::move(__rhs.__sb_))
{
ostream::set_rdbuf(&__sb_);
}
_LIBCPP_INLINE_VISIBILITY
ostrstream& operator=(ostrstream&& __rhs)
{
ostream::operator=(_VSTD::move(__rhs));
__sb_ = _VSTD::move(__rhs.__sb_);
return *this;
}
#endif // _LIBCPP_CXX03_LANG
virtual ~ostrstream();
_LIBCPP_INLINE_VISIBILITY
void swap(ostrstream& __rhs)
{
ostream::swap(__rhs);
__sb_.swap(__rhs.__sb_);
}
_LIBCPP_INLINE_VISIBILITY
strstreambuf* rdbuf() const {return const_cast<strstreambuf*>(&__sb_);}
_LIBCPP_INLINE_VISIBILITY
void freeze(bool __freezefl = true) {__sb_.freeze(__freezefl);}
_LIBCPP_INLINE_VISIBILITY
char* str() {return __sb_.str();}
_LIBCPP_INLINE_VISIBILITY
int pcount() const {return __sb_.pcount();}
private:
strstreambuf __sb_; // exposition only
};
class _LIBCPP_TYPE_VIS strstream
: public iostream
{
public:
// Types
typedef char char_type;
typedef char_traits<char>::int_type int_type;
typedef char_traits<char>::pos_type pos_type;
typedef char_traits<char>::off_type off_type;
// constructors/destructor
_LIBCPP_INLINE_VISIBILITY
strstream()
: iostream(&__sb_) {}
_LIBCPP_INLINE_VISIBILITY
strstream(char* __s, int __n, ios_base::openmode __mode = ios_base::in | ios_base::out)
: iostream(&__sb_),
__sb_(__s, __n, __s + (__mode & ios::app ? _VSTD::strlen(__s) : 0))
{}
#ifndef _LIBCPP_CXX03_LANG
_LIBCPP_INLINE_VISIBILITY
strstream(strstream&& __rhs)
: iostream(_VSTD::move(__rhs)),
__sb_(_VSTD::move(__rhs.__sb_))
{
iostream::set_rdbuf(&__sb_);
}
_LIBCPP_INLINE_VISIBILITY
strstream& operator=(strstream&& __rhs)
{
iostream::operator=(_VSTD::move(__rhs));
__sb_ = _VSTD::move(__rhs.__sb_);
return *this;
}
#endif // _LIBCPP_CXX03_LANG
virtual ~strstream();
_LIBCPP_INLINE_VISIBILITY
void swap(strstream& __rhs)
{
iostream::swap(__rhs);
__sb_.swap(__rhs.__sb_);
}
// Members:
_LIBCPP_INLINE_VISIBILITY
strstreambuf* rdbuf() const {return const_cast<strstreambuf*>(&__sb_);}
_LIBCPP_INLINE_VISIBILITY
void freeze(bool __freezefl = true) {__sb_.freeze(__freezefl);}
_LIBCPP_INLINE_VISIBILITY
int pcount() const {return __sb_.pcount();}
_LIBCPP_INLINE_VISIBILITY
char* str() {return __sb_.str();}
private:
strstreambuf __sb_; // exposition only
};
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP_STRSTREAM
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