412ccb3b47
* data.h, data-user.c, data-stream.c, data-mem.c, data-fd.c, data-compat.c: New file. Really check them in this time, completes 2002-10-08 change.
77 lines
1.7 KiB
C
77 lines
1.7 KiB
C
/* data-stream.c - A memory based data object.
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* Copyright (C) 2002 g10 Code GmbH
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*
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* This file is part of GPGME.
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*
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* GPGME is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* GPGME is distributed in the hope that it will be useful,
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* but 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 this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#if HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <sys/types.h>
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#include "data.h"
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static int
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stream_read (GpgmeData dh, void *buffer, size_t size)
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{
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size_t amt = fread (buffer, 1, size, dh->data.stream);
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if (amt > 0)
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return amt;
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return ferror (dh->data.stream) ? -1 : 0;
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}
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static ssize_t
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stream_write (GpgmeData dh, const void *buffer, size_t size)
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{
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size_t amt = fwrite (buffer, 1, size, dh->data.stream);
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if (amt > 0)
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return amt;
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return ferror (dh->data.stream) ? -1 : 0;
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}
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static off_t
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stream_seek (GpgmeData dh, off_t offset, int whence)
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{
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return fseek (dh->data.stream, offset, whence);
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}
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static struct gpgme_data_cbs stream_cbs =
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{
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stream_read,
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stream_write,
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stream_seek,
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NULL
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};
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GpgmeError
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gpgme_data_new_from_stream (GpgmeData *dh, FILE *stream)
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{
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GpgmeError err = _gpgme_data_new (dh, &stream_cbs);
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if (err)
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return err;
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(*dh)->data.stream = stream;
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return 0;
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}
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