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dtool/src/dtoolbase/fakestringstream.h

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// Filename: fakestringstream.h
// Created by:  cary (04Feb99)
//
////////////////////////////////////////////////////////////////////
//
// PANDA 3D SOFTWARE
// Copyright (c) 2001, Disney Enterprises, Inc.  All rights reserved
//
// All use of this software is subject to the terms of the Panda 3d
// Software license.  You should have received a copy of this license
// along with this source code; you will also find a current copy of
// the license at http://www.panda3d.org/license.txt .
//
// To contact the maintainers of this program write to
// panda3d@yahoogroups.com .
//
////////////////////////////////////////////////////////////////////

#ifndef FAKESTRINGSTREAM_H
#define FAKESTRINGSTREAM_H

#include <strstream.h>
#include <string.h>
#include <string>

#ifdef HAVE_NAMESPACE
using namespace std;
#endif

class fake_istream_buffer {
public:
  fake_istream_buffer() {
    _len = 0;
    _str = "";
  }
  fake_istream_buffer(const string &source) {
    _len = source.length();
    if (_len == 0) {
      _str = "";
    } else {
      _str = new char[_len];
      memcpy(_str, source.data(), _len);
    }
  }
  ~fake_istream_buffer() {
    if (_len != 0) {
      delete[] _str;
    }
  }

  int _len;
  char *_str;
};

class istringstream : public fake_istream_buffer, public istrstream {
public:
  istringstream(const string &input) :
    fake_istream_buffer(input),
    istrstream(_str, _len) { }
};

class ostringstream : public ostrstream {
public:
  string str() {
    // We must capture the length before we take the str().
    int length = pcount();
    char *s = ostrstream::str();
    string result(s, length);
    delete[] s;
    return result;
  }
};

class stringstream : public fake_istream_buffer, public strstream {
public:
  stringstream() : strstream() {
    _owns_str = true;
  }
  stringstream(const string &input) :
    fake_istream_buffer(input),
    strstream(_str, _len, ios::in)
  {
    _owns_str = false;
  }

  // str() doesn't seem to compile cross-platform too reliably--Irix
  // doesn't define pcount() for some reason.  On the other hand, why
  // are you calling str() on a stringstream?  Just use an
  // ostringstream.

  /*
  string str() {
    int length = pcount();
    char *s = strstream::str();
    string result(s, length);
    if (_owns_str) {
      delete[] s;
    }
    return result;
  }
  */

private:
  bool _owns_str;
};

#endif

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