anl_cbuf.cxx

Go to the documentation of this file.

/*

  Copyright (C) 2000, 2001 Silicon Graphics, Inc.  All Rights Reserved.

  This program is free software; you can redistribute it and/or modify it
  under the terms of version 2 of the GNU General Public License as
  published by the Free Software Foundation.

  This program is distributed in the hope that it would be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  

  Further, this software is distributed without any warranty that it is
  free of the rightful claim of any third person regarding infringement 
  or the like.  Any license provided herein, whether implied or 
  otherwise, applies only to this software file.  Patent licenses, if 
  any, provided herein do not apply to combinations of this program with 
  other software, or any other product whatsoever.  

  You should have received a copy of the GNU General Public License along
  with this program; if not, write the Free Software Foundation, Inc., 59
  Temple Place - Suite 330, Boston MA 02111-1307, USA.

  Contact information:  Silicon Graphics, Inc., 1600 Amphitheatre Pky,
  Mountain View, CA 94043, or:

  http://www.sgi.com

  For further information regarding this notice, see:

  http://oss.sgi.com/projects/GenInfo/NoticeExplan

*/


/* -*-Mode: c++;-*- (Tell emacs to use c++ mode) */

#include "defs.h"  // Basic types, such as INT32 */
#include "cxx_memory.h"    /* CXX_NEW/CXX_DELETE */
#include "anl_cbuf.h"


BOOL
ANL_CBUF::_Is_Splitc(char splitc)
{
   INT i;

   for (i = 0; _splitchars[i] != '\0' && _splitchars[i] != splitc; i++);
   return (_splitchars[i] == splitc);

} // ANL_CBUF::_Is_Splitc


void
ANL_CBUF::_Split()
{
   // Preconditions: _buf must be '\0' terminated
   //                _linelength == _max_linelength
   //
   // Note that we never split a line such that the resultant line,
   // after concatenating in the continuation string, again must be
   // split (since this could lead to an infinite recursion of splits).
   //
   INT splitpt, reduction;

   for (splitpt = _next-1;
        splitpt >= 0 && _buf[splitpt] != '\n' && !_Is_Splitc(_buf[splitpt]);
        splitpt--);

   reduction = _next-(splitpt+1);
   if (strlen(_continuation)+reduction < _max_linelength &&
       _buf[splitpt] != '\n')
   {
      // Do the split immediately after the splitpt; any other 
      // cases are considered impossible to split.
      //
      ANL_CBUF remainder(_pool, &_buf[splitpt+1]);

      _linelength -= reduction; // Start again from split-point
      _next = splitpt+1;
      Write_String(_continuation);      // Insert continuation on a new line
      Write_String(remainder.Chars());  // Insert characters after splitpt
   }
} // ANL_CBUF::_Split


ANL_CBUF::ANL_CBUF(MEM_POOL *pool, const char *s):
   _splitchars(""),
   _continuation(""),
   _linelength(0),
   _max_linelength(UINT32_MAX),
   _chunk_size(CBUF_SMALLEST_ALLOC_SIZE),
   _pool(pool)
{
   if (s == NULL)
   {
      _next = 0;
      _linelength = 0;
      _size = 0;
      _buf = NULL;
   }
   else
   {
      // Allocate a multiple of chunks large enough to hold s plus
      // one additional character.
      //
      _next = strlen(s);
      _size = _A_Number_Of_Chunks(_next+1);
      _buf = _Alloc(_size);
      for (INT i=0; i<_next; i++)
      {
         _buf[i] = s[i];
         if (s[i]=='\n')
            _linelength = 0;
         else
            _linelength++;
      }
      _buf[_next] = '\0';
   }
} // ANL_CBUF::ANL_CBUF


void
ANL_CBUF::Write_Char(char c)
{
   if (_size == 0)
   {
      _size = _chunk_size;
      _buf = _Alloc(_size);
   }
   else if (_next+1 >= _size)
   {
      char *reclaim = _buf;

      _size = _size + _chunk_size;
      _buf = strcpy(_Alloc(_size), reclaim);
      CXX_DELETE_ARRAY(reclaim, _pool);
   }
   _buf[_next++] = c;
   _buf[_next] = '\0';

   if (c == '\n')
      _linelength = 0;
   else if (++_linelength >= _max_linelength)
      _Split();

} // ANL_CBUF::Write_Char


void
ANL_CBUF::Write_String(const char *s)
{
   UINT len;

   if (s==NULL)
      return;

   len = strlen(s);
   if (_next+len >= _size)
   {
      // Allocate a multiple of chunks large enough to hold s + '\0'
      //
      _size = _A_Number_Of_Chunks(_next+len+1);
      if (_next > 0)
      {
         char *reclaim = _buf;

         _buf = strcpy(_Alloc(_size), reclaim);
         CXX_DELETE_ARRAY(reclaim, _pool);
      }
      else
         _buf = _Alloc(_size);
   }
   for (INT i=0; i<len; i++)
   {
      _buf[_next++] = s[i];

      if (s[i] == '\n')
         _linelength = 0;
      else if (++_linelength >= _max_linelength)
      {
         _buf[_next] = '\0';
         _Split();  // NOTE: may call CBUF::Write_String() recursively

         // May need to reallocate the buffer, so do the rest recursively
         //
         if (i+1<len)
            Write_String(&s[i+1]);
         i = len;
      }
   }
   _buf[_next] = '\0';
} // ANL_CBUF::Write_String


void
ANL_CBUF:: Append_Pragma_Preamble(BOOL is_omp, BOOL is_lower_case)
{
  // Append the appropriate preamble for OMP pragmas 
  // or just add a space.

   if (is_omp)
     if (is_lower_case)
       Write_String("omp_");
     else
      Write_String(" OMP_");
   else 
     if (!is_lower_case)
       Write_Char(' ');

}  // ANL_CBUF:: Append_Pragma_Preamble