/*
 * Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
 * Copyright (C) 2007 - INRIA
 * Copyright (C) 2010 - DIGITEO - Allan CORNET
 *
 * This file must be used under the terms of the CeCILL.
 * This source file is licensed as described in the file COPYING, which
 * you should have received as part of this distribution.  The terms
 * are also available at
 * http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
 *
 */
/*--------------------------------------------------------------------------*/
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include "mseek.h"
#include "filesmanagement.h"
#include "sciprint.h"
#include "localization.h"
/*--------------------------------------------------------------------------*/
#if (defined(sun) && !defined(SYSV))
char *strerror (int errcode);
#endif
/*--------------------------------------------------------------------------*/
#if (defined(sun) && !defined(SYSV)) || defined(sgi)
#define SEEK_SET 0
#define SEEK_CUR 1
#define SEEK_END 2
#endif
/*--------------------------------------------------------------------------*/
void C2F(mseek) (int *fd, double *offset, const char *flag, int *err)
{
    int iflag;
#if (defined(sun) && !defined(SYSV)) || defined(sgi)
    int irep;
#endif
    FILE *fa = GetFileOpenedInScilab(*fd);
    *err = 0;
    if ( fa == (FILE *) 0 )
    {
        char *filename = GetFileNameOpenedInScilab(*fd);
        if (filename)
        {
            sciprint(_("%s: Error while opening, reading or writing '%s'.\n"), "mseek", filename);
        }
        else
        {
            sciprint(_("%s: Error while opening, reading or writing.\n"), "mseek");
        }

        *err = 1;
        return;
    }
    if ( strncmp(flag, "set", 3) == 0 )
    {
        iflag = SEEK_SET;
    }
    else if ( strncmp(flag, "cur", 3) == 0 )
    {
        iflag = SEEK_CUR;
    }
    else if ( strncmp(flag, "end", 3) == 0 )
    {
        iflag = SEEK_END;
    }
    else
    {
        sciprint(_("%s: Wrong value for input argument #%d: '%s', '%s' or '%s' expected.\n"), "mseek", 3, "set", "cur", "end");
        *err = 1;
        return;
    }
#if (defined(sun) && !defined(SYSV)) || defined(sgi)
    irep = fseek(fa, (long) * offset, iflag) ;
    if ( irep != 0 )
    {
        sciprint(strerror(irep));
        *err = 1;
    }
    else
    {
        *err = 0;
    }
#else
#ifdef _MSC_VER
#if _WIN64
    if (_fseeki64(fa, (long long) *offset, iflag) == -1 )
#else
    if (fseek(fa, (long) *offset, iflag) == -1 )
#endif
#else
    if (fseek(fa, (long) *offset, iflag) == -1 )
#endif
    {
        int errnum = errno; /* global variable produced by fseek */
        sciprint(_("%s: An error occurred in %s: errno=%s\n"), "mseek", "fseek", strerror(errnum));
        *err = 1;
    }
    else
    {
        *err = 0;
    }
#endif
}
/*--------------------------------------------------------------------------*/