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