69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
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/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 2017,2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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*
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* This file is part of GNU Mes.
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*
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* GNU Mes is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* GNU Mes is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libmes.h>
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#include <stdio.h>
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int
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_fungetc_p (FILE *stream)
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{
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return _fdungetc_p ((int)stream);
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}
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size_t
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fread (void *data, size_t size, size_t count, FILE *stream)
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{
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if (! size || !count)
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return 0;
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size_t todo = size * count;
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char *buf = (char*)data;
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int bytes = 0;
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while (_fungetc_p (stream) && todo-- && ++bytes)
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*buf++ = fgetc (stream);
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if (todo)
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{
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int r = read ((int)stream, buf, todo);
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if (r < 0 && !bytes)
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bytes = r;
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else
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bytes += r;
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}
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if (__mes_debug ())
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{
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eputs ("fread fd="); eputs (itoa ((int)stream));
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eputs (" bytes="); eputs (itoa (bytes)); eputs ("\n");
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static char buf[4096];
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if (bytes > 0 && bytes < sizeof (buf))
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{
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strncpy (buf, data, bytes);
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buf[bytes] = 0;
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eputs ("fread buf="); eputs (buf); eputs ("\n");
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}
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}
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if (bytes > 0)
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return bytes/size;
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return 0;
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}
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