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/* ****************************************************************************
* stdio/read.c -- Read from a stream.
* Copyright (C) 2017 Thomas "Cakeisalie5" Touhey <thomas@touhey.fr>
*
* This file is part of the 'all/core' module,
* in libcarrot, an experimental modular libc project.
*
* This file 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.
*
* This file 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 Lesser Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this file. If not, see <http://www.gnu.org/licenses/>.
* ************************************************************************* */
#include "stdio.h"
/**
* fread:
* Read from a FILE stream.
*
* @arg ptr the reception buffer.
* @arg size the size of an element.
* @arg nmemb the number of elements to receive.
* @arg stream the stream.
* @return the number of received elements.
*/
size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream)
{
long rd;
/* check if we can read */
if (!stream->read) return (0);
/* read */
rd = (*stream->read)(stream->cookie, ptr, size * nmemb);
if (rd < 0) return (0);
/* update offset and return */
stream->offset += rd;
return (rd / size);
}
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