rewind_nat.c

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/*
 ****************************************************************************
 *
 * MODULE:       Vector library 
 *              
 * AUTHOR(S):    Original author CERL, probably Dave Gerdes or Mike Higgins.
 *               Update to GRASS 5.7 Radim Blazek and David D. Gray.
 *
 * PURPOSE:      Higher 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 <grass/Vect.h>

/* Rewind vector data file to cause reads to start at beginning.
 ** returns 0 on success
 **        -1 on error
 */
int V1_rewind_nat(struct Map_info *Map)
{
    return (dig_fseek(&(Map->dig_fp), Map->head.head_size, SEEK_SET));
}

int V2_rewind_nat(struct Map_info *Map)
{
    Map->next_line = 1;
    return V1_rewind_nat(Map);  /* make sure level 1 reads are reset too */
}