/* open_datafile.c -- Set up datafile context.

   Usage: Before including this template file in your source file,

   #define the prototype of the function under test in the CALL

   symbol, see tadd_tmpl.c for an example.

Copyright (C) 2012, 2013 INRIA

This file is part of GNU MPC.

GNU MPC is free software; you can redistribute it and/or modify it under

the terms of the GNU Lesser General Public License as published by the

Free Software Foundation; either version 3 of the License, or (at your

option) any later version.

GNU MPC 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 Lesser General Public License for

more details.

You should have received a copy of the GNU Lesser General Public License

along with this program. If not, see http://www.gnu.org/licenses/ .

*/

#include <string.h>

#include "mpc-tests.h"

void

open_datafile (mpc_datafile_context_t* datafile_context,

               const char * data_filename)

{

  char *src_dir;

  char default_srcdir[] = ".";

  src_dir = getenv ("srcdir");

  if (src_dir == NULL)

    src_dir = default_srcdir;

  datafile_context->pathname =

    (char *) malloc ((strlen (src_dir)) + strlen (data_filename) + 2);

  if (datafile_context->pathname == NULL)

    {

      fprintf (stderr, "Cannot allocate memory\n");

      exit (1);

    }

  sprintf (datafile_context->pathname, "%s/%s", src_dir, data_filename);

  datafile_context->fd = fopen (datafile_context->pathname, "r");

  if (datafile_context->fd == NULL)

    {

      fprintf (stderr, "Unable to open %s\n", datafile_context->pathname);

      exit (1);

    }

  datafile_context->line_number = 1;

  datafile_context->nextchar = getc (datafile_context->fd);

  tpl_skip_whitespace_comments (datafile_context);

}