/*
****************************************************************************
*
* MODULE:       Vector library 
*   	    	
* AUTHOR(S):    Radim Blazek
*
* PURPOSE:      Lower level functions for reading/writing/manipulating vectors.
*
* COPYRIGHT:    (C) 2001 by the GRASS Development Team
*
*               This program is free software under the GNU General Public
*   	    	License (>=v2). Read the file COPYING that comes with GRASS
*   	    	for details.
*
*****************************************************************************/
#include <string.h>
#include <stdio.h>
#include <grass/Vect.h>
#include <grass/gis.h>

/* Read vector format.
*
*  Returns: format number
*           -1 on error
*/           
int 
dig_read_frmt_ascii ( FILE *dascii, struct Format_info *finfo)
{
  char buff[20001], buf1[1024];
  char *ptr;
  int  frmt = -1;

  G_debug ( 3, "dig_read_frmt_ascii()" );
	  
  /* read first line which must be FORMAT: */
  if ( G_getl2 (buff, 2000, dascii) ) {
      G_chop (buff);
      
      if (!(ptr = G_index (buff, ':'))) {
          G_warning ("Vector format not recognized: %s", buff);
          return (-1);	 
      }

      strcpy ( buf1, buff ); buf1[ptr - buff] = '\0';
      
      ptr++;			/* Search for the start of text */
      while (*ptr == ' ') ptr++;

      if (strcmp (buf1, "FORMAT" ) == 0) {
	  if ( G_strcasecmp (ptr, "ogr") == 0) {
	      frmt = GV_FORMAT_OGR; 
	  }	  
      }
  }    
  if ( frmt == -1) {
      G_warning ("Vector format not recognized: %s", buff);
      return (-1);	 
  }

  /* init format info values */
#ifdef HAVE_OGR	  
  finfo->ogr.dsn        = NULL;
  finfo->ogr.layer_name = NULL;
#endif
	  
  while ( G_getl2 (buff, 2000, dascii) )
  {
      G_chop (buff);
      
      if (!(ptr = G_index (buff, ':'))) {
	  G_warning ("Format definition is not correct: %s", buff);
	  continue;
      }

      strcpy ( buf1, buff ); buf1[ptr - buff] = '\0';

      ptr++;			/* Search for the start of text */
      while (*ptr == ' ') ptr++;
     
#ifdef HAVE_OGR	  
      if (strcmp (buf1, "DSN") == 0)
	  finfo->ogr.dsn    = G_store (ptr);
      if (strcmp (buf1, "LAYER") == 0)
	  finfo->ogr.layer_name = G_store (ptr);
#endif
    }

    return frmt;
}

/* Write vector format, currently does not work
*  Parse also connection string.
*
*  Returns: 0 OK
*           -1 on error
*/           
int 
dig_write_frmt_ascii ( FILE *dascii, struct Format_info *finfo, int format)
{
    G_debug ( 3, "dig_write_frmt_ascii()");
    
    G_fatal_error ("Format not supported by dig_write_frmt_ascii()");

    return 0;
}

