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/*
* This file is part of ltrace.
* Copyright (C) 2012 Petr Machata, Red Hat Inc.
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
/* _GNU_SOURCE may be necessary for open_memstream visibility (see
* configure.ac), and there's no harm defining it just in case. */
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include "config.h"
#include "memstream.h"
int
memstream_init(struct memstream *memstream)
{
#if HAVE_OPEN_MEMSTREAM
memstream->stream = open_memstream(&memstream->buf,
&memstream->size);
#else
memstream->stream = tmpfile();
memstream->buf = NULL;
#endif
return memstream->stream != NULL ? 0 : -1;
}
int
memstream_close(struct memstream *memstream)
{
#if !defined(HAVE_OPEN_MEMSTREAM) || !HAVE_OPEN_MEMSTREAM
if (fseek(memstream->stream, 0, SEEK_END) < 0) {
fail:
fclose(memstream->stream);
return -1;
}
memstream->size = ftell(memstream->stream);
if (memstream->size == (size_t)-1)
goto fail;
memstream->buf = malloc(memstream->size);
if (memstream->buf == NULL)
goto fail;
rewind(memstream->stream);
if (fread(memstream->buf, 1, memstream->size, memstream->stream)
< memstream->size)
goto fail;
#endif
return fclose(memstream->stream) == 0 ? 0 : -1;
}
void
memstream_destroy(struct memstream *memstream)
{
free(memstream->buf);
}
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