diff options
Diffstat (limited to 'contrib/libstdc++/sstream')
| -rw-r--r-- | contrib/libstdc++/sstream | 568 |
1 files changed, 343 insertions, 225 deletions
diff --git a/contrib/libstdc++/sstream b/contrib/libstdc++/sstream index 714be71..45393b1 100644 --- a/contrib/libstdc++/sstream +++ b/contrib/libstdc++/sstream @@ -1,225 +1,343 @@ -/* This is part of libio/iostream, providing -*- C++ -*- input/output.
-Copyright (C) 2000 Free Software Foundation
-
-This file is part of the GNU IO Library. This library is free
-software; you can redistribute it and/or modify it under the
-terms of the GNU General Public License as published by the
-Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-This library is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this library; see the file COPYING. If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
-As a special exception, if you link this library with files
-compiled with a GNU compiler to produce an executable, this does not cause
-the resulting executable to be covered by the GNU General Public License.
-This exception does not however invalidate any other reasons why
-the executable file might be covered by the GNU General Public License. */
-
-/* Written by Magnus Fromreide (magfr@lysator.liu.se). */
-
-#ifndef __SSTREAM__
-#define __SSTREAM__
-
-#include <string>
-#include <iostream.h>
-#include <streambuf.h>
-
-namespace std
-{
- class stringbuf : public streambuf
- {
- public:
- typedef char char_type;
- typedef int int_type;
- typedef streampos pos_type;
- typedef streamoff off_type;
-
- explicit stringbuf(int which=ios::in|ios::out) :
- streambuf(which), buf(), mode(static_cast<ios::open_mode>(which)),
- rpos(0), bufsize(1)
- { }
-
- explicit stringbuf(const std::string &s, int which=ios::in|ios::out) :
- streambuf(which), buf(s), mode(static_cast<ios::open_mode>(which)),
- bufsize(1)
- {
- if(mode & ios::in)
- {
- setg(&defbuf, &defbuf + bufsize, &defbuf + bufsize);
- }
- if(mode & ios::out)
- {
- setp(&defbuf, &defbuf + bufsize);
- }
- rpos = (mode & ios::ate ? s.size() : 0);
- }
-
- std::string str() const
- {
- const_cast<stringbuf*>(this)->sync(); // Sigh, really ugly hack
- return buf;
- };
-
- void str(const std::string& s)
- {
- buf = s;
- if(mode & ios::in)
- {
- gbump(egptr() - gptr());
- }
- if(mode & ios::out)
- {
- pbump(pbase() - pptr());
- }
- rpos = (mode & ios::ate ? s.size() : 0);
- }
-
- protected:
- inline virtual int sync();
- inline virtual int overflow(int = EOF);
- inline virtual int underflow();
- private:
- std::string buf;
- ios::open_mode mode;
- std::string::size_type rpos;
- streamsize bufsize;
- char defbuf;
- };
-
- class stringstreambase : virtual public ios {
- protected:
- stringbuf __my_sb;
- public:
- std::string str() const
- {
- return dynamic_cast<stringbuf*>(_strbuf)->str();
- }
- void str(const std::string& s)
- {
- clear();
- dynamic_cast<stringbuf*>(_strbuf)->str(s);
- }
-
- stringbuf* rdbuf()
- {
- return &__my_sb;
- }
- protected:
- stringstreambase(int which) :
- __my_sb(which)
- {
- init (&__my_sb);
- }
-
- stringstreambase(const std::string& s, int which) :
- __my_sb(s, which)
- {
- init (&__my_sb);
- }
- };
-
- class istringstream : public stringstreambase, public istream {
- public:
- istringstream(int which=ios::in) :
- stringstreambase(which)
- { }
-
- istringstream(const std::string& s, int which=ios::in) :
- stringstreambase(s, which)
- { }
- };
-
- class ostringstream : public stringstreambase, public ostream {
- public:
- ostringstream(int which=ios::out) :
- stringstreambase(which)
- { }
-
- ostringstream(const std::string& s, int which=ios::out) :
- stringstreambase(s, which)
- { }
- };
-
- class stringstream : public stringstreambase, public iostream {
- public:
- stringstream(int which=ios::in|ios::out) :
- stringstreambase(which)
- { }
-
- stringstream(const std::string &s, int which=ios::in|ios::out) :
- stringstreambase(s, which)
- { }
- };
-}
-
-inline int std::stringbuf::sync()
-{
- if((mode & ios::out) == 0)
- return EOF;
-
- streamsize n = pptr() - pbase();
- if(n)
- {
- buf.replace(rpos, std::string::npos, pbase(), n);
- if(buf.size() - rpos != n)
- return EOF;
- rpos += n;
- pbump(-n);
- gbump(egptr() - gptr());
- }
- return 0;
-}
-
-inline int std::stringbuf::overflow(int ch)
-{
- if((mode & ios::out) == 0)
- return EOF;
-
- streamsize n = pptr() - pbase();
-
- if(n && sync())
- return EOF;
-
- if(ch != EOF)
- {
- std::string::size_type oldSize = buf.size();
-
- buf.replace(rpos, std::string::npos, ch);
- if(buf.size() - oldSize != 1)
- return EOF;
- ++rpos;
- }
- return 0;
-}
-
-inline int std::stringbuf::underflow()
-{
- sync();
- if((mode & ios::in) == 0)
- {
- return EOF;
- }
- if(rpos >= buf.size())
- {
- return EOF;
- }
-
- std::string::size_type n = egptr() - eback();
- std::string::size_type s;
-
- s = buf.copy(eback(), n, rpos);
- pbump(pbase() - pptr());
- gbump(eback() - gptr());
- int res = (0377 & buf[rpos]);
- rpos += s;
- return res;
-}
-
-#endif /* not __STRSTREAM__ */
+/* This is part of libio/iostream, providing -*- C++ -*- input/output. +Copyright (C) 2000 Free Software Foundation + +This file is part of the GNU IO Library. This library is free +software; you can redistribute it and/or modify it under the +terms of the GNU General Public License as published by the +Free Software Foundation; either version 2, or (at your option) +any later version. + +This library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this library; see the file COPYING. If not, write to the Free +Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +As a special exception, if you link this library with files +compiled with a GNU compiler to produce an executable, this does not cause +the resulting executable to be covered by the GNU General Public License. +This exception does not however invalidate any other reasons why +the executable file might be covered by the GNU General Public License. */ + +/* Written by Magnus Fromreide (magfr@lysator.liu.se). */ +/* seekoff and ideas for overflow is largely borrowed from libstdc++-v3 */ + +#ifndef __SSTREAM__ +#define __SSTREAM__ + +#include <iostream.h> +#include <streambuf.h> +#include <string> + +namespace std +{ + class stringbuf : public streambuf + { + public: + typedef char char_type; + typedef int int_type; + typedef streampos pos_type; + typedef streamoff off_type; + + explicit + stringbuf(int which=ios::in|ios::out) + : streambuf(), mode(static_cast<ios::open_mode>(which)), + stream(NULL), stream_len(0) + { + stringbuf_init(); + } + + explicit + stringbuf(const string &str, int which=ios::in|ios::out) + : streambuf(), mode(static_cast<ios::open_mode>(which)), + stream(NULL), stream_len(0) + { + if (mode & (ios::in|ios::out)) + { + stream_len = str.size(); + stream = new char_type[stream_len]; + str.copy(stream, stream_len); + } + stringbuf_init(); + } + + virtual + ~stringbuf() + { + delete[] stream; + } + + string + str() const + { + if (pbase() != 0) + return string(stream, pptr()-pbase()); + else + return string(); + } + + void + str(const string& str) + { + delete[] stream; + stream_len = str.size(); + stream = new char_type[stream_len]; + str.copy(stream, stream_len); + stringbuf_init(); + } + + protected: + // The buffer is already in gptr, so if it ends then it is out of data. + virtual int + underflow() + { + return EOF; + } + + virtual int + overflow(int c = EOF) + { + int res; + if (mode & ios::out) + { + if (c != EOF) + { + streamsize old_stream_len = stream_len; + stream_len += 1; + char_type* new_stream = new char_type[stream_len]; + memcpy(new_stream, stream, old_stream_len); + delete[] stream; + stream = new_stream; + stringbuf_sync(gptr()-eback(), pptr()-pbase()); + sputc(c); + res = c; + } + else + res = EOF; + } + else + res = 0; + return res; + } + + virtual streambuf* + setbuf(char_type* s, streamsize n) + { + if (n != 0) + { + delete[] stream; + stream = new char_type[n]; + memcpy(stream, s, n); + stream_len = n; + stringbuf_sync(0, 0); + } + return this; + } + + virtual pos_type + seekoff(off_type off, ios::seek_dir way, int which = ios::in | ios::out) + { + pos_type ret = pos_type(off_type(-1)); + bool testin = which & ios::in && mode & ios::in; + bool testout = which & ios::out && mode & ios::out; + bool testboth = testin && testout && way != ios::cur; + + if (stream_len && ((testin != testout) || testboth)) + { + char_type* beg = stream; + char_type* curi = NULL; + char_type* curo = NULL; + char_type* endi = NULL; + char_type* endo = NULL; + + if (testin) + { + curi = gptr(); + endi = egptr(); + } + if (testout) + { + curo = pptr(); + endo = epptr(); + } + + off_type newoffi = 0; + off_type newoffo = 0; + if (way == ios::beg) + { + newoffi = beg - curi; + newoffo = beg - curo; + } + else if (way == ios::end) + { + newoffi = endi - curi; + newoffo = endo - curo; + } + + if (testin && newoffi + off + curi - beg >= 0 && + endi - beg >= newoffi + off + curi - beg) + { + gbump(newoffi + off); + ret = pos_type(newoffi + off + curi); + } + if (testout && newoffo + off + curo - beg >= 0 && + endo - beg >= newoffo + off + curo - beg) + { + pbump(newoffo + off); + ret = pos_type(newoffo + off + curo); + } + } + return ret; + } + + virtual pos_type + seekpos(pos_type sp, int which = ios::in | ios::out) + { + pos_type ret = seekoff(sp, ios::beg, which); + return ret; + } + + private: + void + stringbuf_sync(streamsize i, streamsize o) + { + if (mode & ios::in) + setg(stream, stream + i, stream + stream_len); + if (mode & ios::out) + { + setp(stream, stream + stream_len); + pbump(o); + } + } + void + stringbuf_init() + { + if (mode & ios::ate) + stringbuf_sync(0, stream_len); + else + stringbuf_sync(0, 0); + } + + private: + ios::open_mode mode; + char_type* stream; + streamsize stream_len; + }; + + class istringstream : public istream { + public: + typedef char char_type; + typedef int int_type; + typedef streampos pos_type; + typedef streamoff off_type; + + explicit + istringstream(int which=ios::in) + : istream(&sb), sb(which | ios::in) + { } + + explicit + istringstream(const string& str, int which=ios::in) + : istream(&sb), sb(str, which | ios::in) + { } + + stringbuf* + rdbuf() const + { + return const_cast<stringbuf*>(&sb); + } + + string + str() const + { + return rdbuf()->str(); + } + void + str(const string& s) + { + rdbuf()->str(s); + } + private: + stringbuf sb; + }; + + class ostringstream : public ostream { + public: + typedef char char_type; + typedef int int_type; + typedef streampos pos_type; + typedef streamoff off_type; + + explicit + ostringstream(int which=ios::out) + : ostream(&sb), sb(which | ios::out) + { } + + explicit + ostringstream(const string& str, int which=ios::out) + : ostream(&sb), sb(str, which | ios::out) + { } + + stringbuf* + rdbuf() const + { + return const_cast<stringbuf*>(&sb); + } + + string + str() const + { + return rdbuf()->str(); + } + + void str(const string& s) + { + rdbuf()->str(s); + } + private: + stringbuf sb; + }; + + class stringstream : public iostream { + public: + typedef char char_type; + typedef int int_type; + typedef streampos pos_type; + typedef streamoff off_type; + + explicit + stringstream(int which=ios::out|ios::in) + : iostream(&sb), sb(which) + { } + + explicit + stringstream(const string& str, int which=ios::out|ios::in) + : iostream(&sb), sb(str, which) + { } + + stringbuf* + rdbuf() const + { + return const_cast<stringbuf*>(&sb); + } + + string + str() const + { + return rdbuf()->str(); + } + + void + str(const string& s) + { + rdbuf()->str(s); + } + private: + stringbuf sb; + }; +}; + +#endif /* not __STRSTREAM__ */ |
