fwrite_source.c

该文件为c++的数学函数库!是一个非常有用的编程工具.它含有各种数学函数,为科学计算、工程应用等程序编写提供方便！

/* block/fwrite_source.c
 * 
 * Copyright (C) 1996, 1997, 1998, 1999, 2000 Gerard Jungman, Brian Gough
 * 
 * This program 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.
 * 
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

int
FUNCTION (gsl_block, fread) (FILE * stream, TYPE(gsl_block) * b)
{
  size_t n = b->size ;

  ATOMIC * data = b->data ;

  size_t items = fread (data, MULTIPLICITY * sizeof (ATOMIC), n, stream);
  
  if (items != n)
    {
      GSL_ERROR ("fread failed", GSL_EFAILED);
    }
      
return 0;
}

int
FUNCTION (gsl_block, fwrite) (FILE * stream, const TYPE(gsl_block) * b)
{
  size_t n = b->size ;

  ATOMIC * data = b->data ;
  
  size_t items = fwrite (data, MULTIPLICITY * sizeof (ATOMIC), n, stream);
  
  if (items != n)
    {
      GSL_ERROR ("fwrite failed", GSL_EFAILED);
    }

  return 0;
}

int
FUNCTION (gsl_block, raw_fread) (FILE * stream, ATOMIC * data, 
                                 const size_t n, const size_t stride)
{
  if (stride == 1)
    {
      size_t items = fread (data, MULTIPLICITY * sizeof (ATOMIC), n, stream);

      if (items != n)
        {
          GSL_ERROR ("fread failed", GSL_EFAILED);
        }
    }
  else
    {
      size_t i;

      for (i = 0; i < n; i++)
        {
          size_t item = fread (data + MULTIPLICITY * i * stride,
                               MULTIPLICITY * sizeof (ATOMIC), 1, stream);
          if (item != 1)
            {
              GSL_ERROR ("fread failed", GSL_EFAILED);
            }
        }
    }

  return GSL_SUCCESS;
}

int
FUNCTION (gsl_block, raw_fwrite) (FILE * stream, const ATOMIC * data,
                                  const size_t n, const size_t stride)
{

  if (stride == 1)
    {
      size_t items = fwrite (data, MULTIPLICITY * sizeof (ATOMIC), n, stream);

      if (items != n)
        {
          GSL_ERROR ("fwrite failed", GSL_EFAILED);
        }
    }
  else
    {
      size_t i;

      for (i = 0; i < n; i++)
        {
          size_t item = fwrite (data + MULTIPLICITY * i * stride,
                                MULTIPLICITY * sizeof (ATOMIC),
                                1, stream);
          if (item != 1)
            {
              GSL_ERROR ("fwrite failed", GSL_EFAILED);
            }
        }
    }

  return GSL_SUCCESS;
}