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Initial checkin

//BEGIN_LICENSE
//
// Copyright (c) 2000 The Open Group, BMC Software, Tivoli Systems, IBM
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
//END_LICENSE
//BEGIN_HISTORY
//
// Author: Bob Blair (bblair@bmc.com)
//
// $Log: parser.cpp,v $
// Revision 1.1  2001/02/16 23:59:09  bob
// Initial checkin
//
//
//END_HISTORY
//
// implementation of valueFactory 
//
//
//
// implementation of those methods  of class parser which are not pure
// virtual
//

#include <iostream>
#include "parser.h"


//---------------------------------------------------------------------
// Take a YY_BUFFERSTATE off the stack of saved contexts
//---------------------------------------------------------------------
bufstate *
parser::pop_statebuff() {
    bufstate *v = 0;
    if (!_include_stack.empty()) {
      v = _include_stack.top();
      _include_stack.pop();
    }
    return v;
}

//-------------------------------------------------------------------
// Create a flex input buffer from a string containing the file name
//-------------------------------------------------------------------
int 
parser::setInputBufferFromName(const string &filename) {
  FILE *f = fopen(filename.c_str(),"rt");
  if (f) {
    set_current_filename(filename);
    set_lineno(1);
    return setInputBuffer(f);
  } else {
    return 1;
  }
}

//-----------------------------------------------------------------
// Handle the end of an input buffer.  Either there is saved context
// or there isn't.  If there is, restore the saved particulars
// of that context so we can keep on parsing
//-----------------------------------------------------------------
int
parser::wrap() {
  bufstate *v = pop_statebuff();
  if (v) {
    setInputBuffer(v->buffer_state);
    set_current_filename(v->filename);
    set_lineno(v->lineno);
    delete v;
    return 0;  // more data available
  } else {
    return 1;  // end of it all
  }
}

//----------------------------------------------------------------
// Log where an error occured.  This is pretty lame, so it needs a
// FIXME
//----------------------------------------------------------------
void
parser::log_parse_error(char *token, char *errmsg) const {
  cerr << _current_filename << ":" << _lineno << ": " << errmsg;
  cerr << " before `" << token << "'" << endl;
}