--- /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:
projects / polintos / scott / priv.git / blobdiff