whirl2c_common.cxx

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/*

  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

*/


/* ====================================================================
 * ====================================================================
 *
 *
 * Revision history:
 *  07-Nov-94 - Original Version
 *
 * Description:
 *
 *   See whirl2c_common.h for comments on this file.
 *
 * ====================================================================
 * ====================================================================
 */

#include <ctype.h>
#include "whirl2c_common.h"
#include "PUinfo.h"


/*----------- Various Utility functions -----------*/

void WHIRL2C_parenthesize(TOKEN_BUFFER tokens)
{
   Prepend_Token_Special(tokens, '(');
   Append_Token_Special(tokens, ')');
} /* WHIRL2C_parenthesize */


/*----------- Functions and state for identifier naming -----------*/

const char * 
WHIRL2C_make_valid_c_name(const char *name)
{
  /* If name==NULL, then return NULL;  otherwise, if a valid name,
   * then keep it unaltered; otherwise, construct a valid name
   * in a new Name_Buf by removing invalid characters (never return
   * NULL for this case)
   */
  const char *return_name = name;
  char       *new_name;
  INT         name_idx;
  
  if (name != NULL)
    {
      /* See if we need to construct a new name. First skip valid
       * characters (alphanumeric or '_', and beginning with
       * an alphabetic or '_' character).
       */
      if (isalpha(name[0]) || name[0] == '_')
        {
          for (name_idx = 1;
              (isalnum(name[name_idx]) || 
               name[name_idx] == '_');
               name_idx++);
        }
      else /* Incorrect first character */
        {
          /* Skip to a valid first character & construct a new name below */
          name_idx = 0;
          while (name[name_idx] != '\0'   &&
                 !isalpha(name[name_idx]) && 
                 name[name_idx] != '_')
            name += 1;
          return_name = name; /* Just in case (name[name_idx] == '\0') */
        }
      
      /* Did we find an invalid character? */
      if (name[name_idx] != '\0')
        {
          /* Need to construct a new name.  This should be relatively rare */
          new_name = strcpy(Get_Name_Buf_Slot(strlen(name) + 1), name);
          return_name = new_name;
          while (*name != '\0')
            {
              if (isalnum(*name) || *name == '_' || *name == '$')
                {
                  *new_name++ = *name++;
                }
              else
                name++; /* Skip invalid character */
            }
          *new_name = '\0';
        }
    }
  return return_name;
} /* WHIRL2C_make_valid_c_name */