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/* -*-comment-start: "//";comment-end:""-*-
* GNU Mes --- Maxwell Equations of Software
* Copyright © 2017,2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
*
* This file is part of GNU Mes.
*
* GNU Mes 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 3 of the License, or (at
* your option) any later version.
*
* GNU Mes 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 GNU Mes. If not, see <http://www.gnu.org/licenses/>.
*/
#include <mes/lib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
int
__fungetc_p (FILE * stream)
{
return __ungetc_p ((int) (long) stream);
}
size_t
fread (void *data, size_t size, size_t count, FILE * stream)
{
if (!size || !count)
return 0;
size_t todo = size * count;
char *buf = (char *) data;
int bytes = 0;
while (__fungetc_p (stream) && todo-- && ++bytes)
*buf++ = fgetc (stream);
int filedes = (long) stream;
if (todo)
{
int r = read (filedes, buf, todo);
if (r < 0 && !bytes)
bytes = r;
else
bytes += r;
}
if (__mes_debug ())
{
static char debug_buf[4096];
eputs ("fread fd=");
eputs (itoa (filedes));
eputs (" bytes=");
eputs (itoa (bytes));
eputs ("\n");
if (bytes > 0 && bytes < sizeof (debug_buf))
{
strncpy (debug_buf, data, bytes);
buf[bytes] = 0;
eputs ("fread buf=");
eputs (debug_buf);
eputs ("\n");
}
}
if (bytes > 0)
return bytes / size;
return 0;
}
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