sl@0: /*
sl@0:  * Portions Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.
sl@0:  *
sl@0:  * Copyright (c) 1999
sl@0:  * Silicon Graphics Computer Systems, Inc.
sl@0:  *
sl@0:  * Copyright (c) 1999
sl@0:  * Boris Fomitchev
sl@0:  *
sl@0:  * This material is provided "as is", with absolutely no warranty expressed
sl@0:  * or implied. Any use is at your own risk.
sl@0:  *
sl@0:  * Permission to use or copy this software for any purpose is hereby granted
sl@0:  * without fee, provided the above notices are retained on all copies.
sl@0:  * Permission to modify the code and to distribute modified code is granted,
sl@0:  * provided the above notices are retained, and a notice that the code was
sl@0:  * modified is included with the above copyright notice.
sl@0:  *
sl@0:  */
sl@0: 
sl@0: // Implementation of the classes in header <strstream>.
sl@0: // WARNING: The classes defined in <strstream> are DEPRECATED.  This
sl@0: // header is defined in section D.7.1 of the C++ standard, and it
sl@0: // MAY BE REMOVED in a future standard revision.  You should use the
sl@0: // header <sstream> instead.
sl@0: 
sl@0: #include "stlport_prefix.h"
sl@0: 
sl@0: #include <strstream>
sl@0: #include <algorithm>
sl@0: #include <limits>
sl@0: 
sl@0: _STLP_BEGIN_NAMESPACE
sl@0: 
sl@0: // strstreambuf constructor, destructor.
sl@0: _STLP_DECLSPEC strstreambuf::strstreambuf(streamsize initial_capacity)
sl@0:    : _M_alloc_fun(0), _M_free_fun(0),
sl@0:      _M_dynamic(true), _M_frozen(false), _M_constant(false) {
sl@0:   size_t n = (sizeof(streamsize) > sizeof(size_t)) ? __STATIC_CAST(size_t, (min)(__STATIC_CAST(streamsize, (numeric_limits<size_t>::max)()),
sl@0:                                                                                  (max)(initial_capacity, streamsize(16))))
sl@0:                                                    : __STATIC_CAST(size_t, (max)(initial_capacity, streamsize(16)));
sl@0: 
sl@0:   char* buf = _M_alloc(n);
sl@0:   if (buf) {
sl@0:     setp(buf, buf + n);
sl@0:     setg(buf, buf, buf);
sl@0:   }
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC strstreambuf::strstreambuf(__alloc_fn alloc_f, __free_fn free_f)
sl@0:   : _M_alloc_fun(alloc_f), _M_free_fun(free_f),
sl@0:     _M_dynamic(true), _M_frozen(false), _M_constant(false) {
sl@0:   size_t n = 16;
sl@0: 
sl@0:   char* buf = _M_alloc(n);
sl@0:   if (buf) {
sl@0:     setp(buf, buf + n);
sl@0:     setg(buf, buf, buf);
sl@0:   }
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC strstreambuf::strstreambuf(char* get, streamsize n, char* put)
sl@0:   : _M_alloc_fun(0), _M_free_fun(0),
sl@0:     _M_dynamic(false), _M_frozen(false), _M_constant(false) {
sl@0:   _M_setup(get, put, n);
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC strstreambuf::strstreambuf(signed char* get, streamsize n, signed char* put)
sl@0:   : _M_alloc_fun(0), _M_free_fun(0),
sl@0:     _M_dynamic(false), _M_frozen(false), _M_constant(false) {
sl@0:   _M_setup(__REINTERPRET_CAST(char*,get), __REINTERPRET_CAST(char*,put), n);
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC strstreambuf::strstreambuf(unsigned char* get, streamsize n,
sl@0:                            unsigned char* put)
sl@0:   : _M_alloc_fun(0), _M_free_fun(0),
sl@0:     _M_dynamic(false), _M_frozen(false), _M_constant(false) {
sl@0:   _M_setup(__REINTERPRET_CAST(char*,get), __REINTERPRET_CAST(char*,put), n);
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC strstreambuf::strstreambuf(const char* get, streamsize n)
sl@0:   : _M_alloc_fun(0), _M_free_fun(0),
sl@0:     _M_dynamic(false), _M_frozen(false), _M_constant(true) {
sl@0:   _M_setup(__CONST_CAST(char*,get), 0, n);
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC strstreambuf::strstreambuf(const signed char* get, streamsize n)
sl@0:   : _M_alloc_fun(0), _M_free_fun(0),
sl@0:     _M_dynamic(false), _M_frozen(false), _M_constant(true) {
sl@0:   _M_setup(__REINTERPRET_CAST(char*, __CONST_CAST(signed char*,get)), 0, n);
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC strstreambuf::strstreambuf(const unsigned char* get, streamsize n)
sl@0:   : _M_alloc_fun(0), _M_free_fun(0),
sl@0:     _M_dynamic(false), _M_frozen(false), _M_constant(true) {
sl@0:   _M_setup(__REINTERPRET_CAST(char*, __CONST_CAST(unsigned char*,get)), 0, n);
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC strstreambuf::~strstreambuf() {
sl@0:   if (_M_dynamic && !_M_frozen)
sl@0:     _M_free(eback());
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC void strstreambuf::freeze(bool frozenflag) {
sl@0:   if (_M_dynamic)
sl@0:     _M_frozen = frozenflag;
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC char* strstreambuf::str() {
sl@0:   freeze(true);
sl@0:   return eback();
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC int strstreambuf::pcount() const {
sl@0:   return int(pptr() ? pptr() - pbase() : 0);
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC strstreambuf::int_type strstreambuf::overflow(int_type c) {
sl@0:   if (c == traits_type::eof())
sl@0:     return traits_type::not_eof(c);
sl@0: 
sl@0:   // Try to expand the buffer.
sl@0:   if (pptr() == epptr() && _M_dynamic && !_M_frozen && !_M_constant) {
sl@0:     ptrdiff_t old_size = epptr() - pbase();
sl@0:     ptrdiff_t new_size = (max)(2 * old_size, ptrdiff_t(1));
sl@0: 
sl@0:     char* buf = _M_alloc(new_size);
sl@0:     if (buf) {
sl@0:       memcpy(buf, pbase(), old_size);
sl@0: 
sl@0:       char* old_buffer = pbase();
sl@0:       bool reposition_get = false;
sl@0:       ptrdiff_t old_get_offset;
sl@0:       if (gptr() != 0) {
sl@0:         reposition_get = true;
sl@0:         old_get_offset = gptr() - eback();
sl@0:       }
sl@0: 
sl@0:       setp(buf, buf + new_size);
sl@0:       pbump((int)old_size);
sl@0: 
sl@0:       if (reposition_get)
sl@0:         setg(buf, buf + old_get_offset, buf + (max)(old_get_offset, old_size));
sl@0: 
sl@0:       _M_free(old_buffer);
sl@0:     }
sl@0:   }
sl@0: 
sl@0:   if (pptr() != epptr()) {
sl@0:     *pptr() = traits_type::to_char_type(c);
sl@0:     pbump(1);
sl@0:     return c;
sl@0:   }
sl@0:   else
sl@0:     return traits_type::eof();
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC strstreambuf::int_type strstreambuf::pbackfail(int_type c) {
sl@0:   if (gptr() != eback()) {
sl@0:     if (c == traits_type::eof()) {
sl@0:       gbump(-1);
sl@0:       return traits_type::not_eof(c);
sl@0:     }
sl@0:     else if (c == gptr()[-1]) {
sl@0:       gbump(-1);
sl@0:       return c;
sl@0:     }
sl@0:     else if (!_M_constant) {
sl@0:       gbump(-1);
sl@0:       *gptr() = traits_type::to_char_type(c);
sl@0:       return c;
sl@0:     }
sl@0:   }
sl@0: 
sl@0:   return traits_type::eof();
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC strstreambuf::int_type strstreambuf::underflow() {
sl@0:   if (gptr() == egptr() && pptr() && pptr() > egptr())
sl@0:     setg(eback(), gptr(), pptr());
sl@0: 
sl@0:   if (gptr() != egptr())
sl@0:     return (unsigned char) *gptr();
sl@0:   else
sl@0:     return _Traits::eof();
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC basic_streambuf<char, char_traits<char> >*
sl@0: strstreambuf::setbuf(char*, streamsize) {
sl@0:   return this;
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC strstreambuf::pos_type
sl@0: strstreambuf::seekoff(off_type off,
sl@0:                       ios_base::seekdir dir, ios_base::openmode mode) {
sl@0:   bool do_get = false;
sl@0:   bool do_put = false;
sl@0: 
sl@0:   if ((mode & (ios_base::in | ios_base::out)) ==
sl@0:           (ios_base::in | ios_base::out) &&
sl@0:       (dir == ios_base::beg || dir == ios_base::end))
sl@0:     do_get = do_put = true;
sl@0:   else if (mode & ios_base::in)
sl@0:     do_get = true;
sl@0:   else if (mode & ios_base::out)
sl@0:     do_put = true;
sl@0: 
sl@0:   // !gptr() is here because, according to D.7.1 paragraph 4, the seekable
sl@0:   // area is undefined if there is no get area.
sl@0:   if ((!do_get && !do_put) || (do_put && !pptr()) || !gptr())
sl@0:     return pos_type(off_type(-1));
sl@0: 
sl@0:   char* seeklow  = eback();
sl@0:   char* seekhigh = epptr() ? epptr() : egptr();
sl@0: 
sl@0:   off_type newoff;
sl@0:   switch(dir) {
sl@0:   case ios_base::beg:
sl@0:     newoff = 0;
sl@0:     break;
sl@0:   case ios_base::end:
sl@0:     newoff = seekhigh - seeklow;
sl@0:     break;
sl@0:   case ios_base::cur:
sl@0:     newoff = do_put ? pptr() - seeklow : gptr() - seeklow;
sl@0:     break;
sl@0:   default:
sl@0:     return pos_type(off_type(-1));
sl@0:   }
sl@0: 
sl@0:   off += newoff;
sl@0:   if (off < 0 || off > seekhigh - seeklow)
sl@0:     return pos_type(off_type(-1));
sl@0: 
sl@0:   if (do_put) {
sl@0:     if (seeklow + __STATIC_CAST(ptrdiff_t, off) < pbase()) {
sl@0:       setp(seeklow, epptr());
sl@0:       pbump((int)off);
sl@0:     }
sl@0:     else {
sl@0:       setp(pbase(), epptr());
sl@0:       pbump((int)(off - (pbase() - seeklow)));
sl@0:     }
sl@0:   }
sl@0:   if (do_get) {
sl@0:     if (off <= egptr() - seeklow)
sl@0:       setg(seeklow, seeklow + __STATIC_CAST(ptrdiff_t, off), egptr());
sl@0:     else if (off <= pptr() - seeklow)
sl@0:       setg(seeklow, seeklow + __STATIC_CAST(ptrdiff_t, off), pptr());
sl@0:     else
sl@0:       setg(seeklow, seeklow + __STATIC_CAST(ptrdiff_t, off), epptr());
sl@0:   }
sl@0: 
sl@0:   return pos_type(newoff);
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC strstreambuf::pos_type
sl@0: strstreambuf::seekpos(pos_type pos, ios_base::openmode mode) {
sl@0:   return seekoff(pos - pos_type(off_type(0)), ios_base::beg, mode);
sl@0: }
sl@0: 
sl@0: 
sl@0: char* strstreambuf::_M_alloc(size_t n) {
sl@0:   if (_M_alloc_fun)
sl@0:     return __STATIC_CAST(char*,_M_alloc_fun(n));
sl@0:   else
sl@0:     return new char[n];
sl@0: }
sl@0: 
sl@0: void strstreambuf::_M_free(char* p) {
sl@0:   if (p)
sl@0:     if (_M_free_fun)
sl@0:       _M_free_fun(p);
sl@0:     else
sl@0:       delete[] p;
sl@0: }
sl@0: 
sl@0: void strstreambuf::_M_setup(char* get, char* put, streamsize n) {
sl@0:   if (get) {
sl@0:     size_t N = n > 0 ? size_t(n) : n == 0 ? strlen(get) : size_t(INT_MAX);
sl@0: 
sl@0:     if (put) {
sl@0:       setg(get, get, get + N);
sl@0:       setp(put, put + N);
sl@0:     }
sl@0:     else {
sl@0:       setg(get, get, get + N);
sl@0:     }
sl@0:   }
sl@0: }
sl@0: 
sl@0: //----------------------------------------------------------------------
sl@0: // Class istrstream
sl@0: 
sl@0: _STLP_DECLSPEC istrstream::istrstream(char* s)
sl@0:   : basic_istream<char, char_traits<char> >(0), _M_buf(s, 0) {
sl@0:   this->init(&_M_buf);
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC istrstream::istrstream(const char* s)
sl@0:   : basic_istream<char, char_traits<char> >(0), _M_buf(s, 0) {
sl@0:   this->init(&_M_buf);
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC istrstream::istrstream(char* s, streamsize n)
sl@0:   : basic_istream<char, char_traits<char> >(0), _M_buf(s, n) {
sl@0:   this->init(&_M_buf);
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC istrstream::istrstream(const char* s, streamsize n)
sl@0:   : basic_istream<char, char_traits<char> >(0), _M_buf(s, n) {
sl@0:   this->init(&_M_buf);
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC istrstream::~istrstream() {}
sl@0: 
sl@0: _STLP_DECLSPEC strstreambuf* istrstream::rdbuf() const {
sl@0:   return __CONST_CAST(strstreambuf*,&_M_buf);
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC char* istrstream::str() { return _M_buf.str(); }
sl@0: 
sl@0: //----------------------------------------------------------------------
sl@0: // Class ostrstream
sl@0: 
sl@0: _STLP_DECLSPEC ostrstream::ostrstream()
sl@0:   : basic_ostream<char, char_traits<char> >(0), _M_buf() {
sl@0:   basic_ios<char, char_traits<char> >::init(&_M_buf);
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC ostrstream::ostrstream(char* s, int n, ios_base::openmode mode)
sl@0:   : basic_ostream<char, char_traits<char> >(0),
sl@0:     _M_buf(s, n, mode & ios_base::app ? s + strlen(s) : s) {
sl@0:   basic_ios<char, char_traits<char> >::init(&_M_buf);
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC ostrstream::~ostrstream() {}
sl@0: 
sl@0: _STLP_DECLSPEC strstreambuf* ostrstream::rdbuf() const {
sl@0:   return __CONST_CAST(strstreambuf*,&_M_buf);
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC void ostrstream::freeze(bool freezeflag) {
sl@0:   _M_buf.freeze(freezeflag);
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC char* ostrstream::str() {
sl@0:   return _M_buf.str();
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC int ostrstream::pcount() const {
sl@0:   return _M_buf.pcount();
sl@0: }
sl@0: 
sl@0: 
sl@0: //----------------------------------------------------------------------
sl@0: // Class strstream
sl@0: 
sl@0: _STLP_DECLSPEC strstream::strstream()
sl@0:   : basic_iostream<char, char_traits<char> >(0), _M_buf() {
sl@0:   basic_ios<char, char_traits<char> >::init(&_M_buf);
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC strstream::strstream(char* s, int n, ios_base::openmode mode)
sl@0:   : basic_iostream<char, char_traits<char> >(0),
sl@0:     _M_buf(s, n, mode & ios_base::app ? s + strlen(s) : s) {
sl@0:   basic_ios<char, char_traits<char> >::init(&_M_buf);
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC strstream::~strstream() {}
sl@0: 
sl@0: _STLP_DECLSPEC strstreambuf* strstream::rdbuf() const {
sl@0:   return __CONST_CAST(strstreambuf*,&_M_buf);
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC void strstream::freeze(bool freezeflag) {
sl@0:   _M_buf.freeze(freezeflag);
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC int strstream::pcount() const {
sl@0:   return _M_buf.pcount();
sl@0: }
sl@0: 
sl@0: _STLP_DECLSPEC char* strstream::str() {
sl@0:   return _M_buf.str();
sl@0: }
sl@0: 
sl@0: _STLP_END_NAMESPACE
sl@0: 
sl@0: // Local Variables:
sl@0: // mode:C++
sl@0: // End: