/*
    GL-117
    Copyright 2001, 2002 Thomas A. Drexl aka heptargon

    This file is part of GL-117.

    GL-117 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 of the License, or
    (at your option) any later version.

    GL-117 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 GL-117; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

// This is a low level library to split text files into tokens.

#ifndef IS_FILELOADER_H
#define IS_FILELOADER_H

/**************************************************************************
  This is a low level library to split text files into tokens.
  Customize strings for quotes, whitespace and comments.
  Then parse one token after each other calling file_nextToken()
  or set the file cursor to a new position calling file_find(mystr)

  Documentation notes:
  - all int-functions return 0 on error/EOF, 1 on success
  - all documented functions are public, the rest is private

  Example to parse MEA-files:
    char token [256];
    file_setWhitespace (" \t\r\n-=");
    file_setQuotes ("\'{}");
    file_addComment ("$", "\n");
    file_open ("test.mea");
    while (file_find ("[MEA_"))         // search for string [MEA_
    {
      file_nextToken (token, 256);      // read the [MEA_ token
      printf ("%s\n", token);           // and print it on stdout
    }
    file_rewind ();                     // again from the beginning
    while (file_nextToken (token, 256)) // read every token
    {
      printf ("%s\n", token);           // print out every token
    }
**************************************************************************/

//#define _LARGEFILE_SOURCE
#define _LARGEFILE_SOURCE64
#define _FILE_OFFSET_BITS 64

// we should use __long here!!!
#define XLONG long

#define FILE_MAXCOMMENTS 10     /* maximum number of comment strings */
#define FILE_MAXLEN 4096       /* maximum length of the file buffer */

extern int file_quoteremove;    /* 1: remove quotes from tokens */

extern int file_ptr;     /* file_buffer pointer to current char = "file cursor" */
extern int file_reverse; /* read only!!! */

/**************************************************************************
  Init data structure
  Example: file_init ();
**************************************************************************/
extern void file_init ();

extern void file_initComments ();

/**************************************************************************
  Revert the file read order (forward/backward)
  Example: file_revert ();
**************************************************************************/
extern void file_revert ();

/**************************************************************************
  Get current position of the file pointer
  Example: file_getPosition ();
**************************************************************************/
extern XLONG file_getPosition ();

/**************************************************************************
  Set current position of the file pointer
  Example: file_setPosition ();
**************************************************************************/
extern int file_setPosition ();

/**************************************************************************
  Get current line of the file
  Example: file_getLine ();
**************************************************************************/
extern int file_getLine ();

/**************************************************************************
  Set the whitespace chars for this file
  Example: file_setWhitespace (" \n\t");
**************************************************************************/
extern void file_setWhitespace (char *string);

/**************************************************************************
  Set the separator chars for this file
  Example: file_setSeparator (",;");
**************************************************************************/
extern void file_setSeparator (char *string);

/**************************************************************************
  Add comment strings for this file
  Example language C++:
    file_addComment ("//", "\n");
**************************************************************************/
extern void file_addComment (char *startstring, char *endstring);

/**************************************************************************
  Set the quote chars for string in this file
  Example: file_setQuotes ("\'\"");
**************************************************************************/
extern void file_setQuotes (char *string);

/**************************************************************************
  Rewind file to an initial state to restart parsing
**************************************************************************/
extern void file_rewind ();

/**************************************************************************
  Open file for parsing
**************************************************************************/
extern int file_open (char *filename);

/**************************************************************************
  Close file
**************************************************************************/
extern int file_close ();

/**************************************************************************
  Find the first occurance of string from the cursor and set cursor
  to the new position, this is quite fast!
**************************************************************************/
extern int file_find (char *string);

/**************************************************************************
  Find the next token from the current cursor position and fill the
  token string. Use tokenlen to define a maximum length for token.
**************************************************************************/
extern int file_nextToken (char *token, int tokenlen);
extern int file_nextChar ();

#endif