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/* membuf.h - A simple implementation of a dynamic buffer
* Copyright (C) 2001, 2003 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of either
*
* - 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.
*
* or
*
* - 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.
*
* or both in parallel, as here.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses/>.
*/
#ifndef GNUPG_COMMON_MEMBUF_H
#define GNUPG_COMMON_MEMBUF_H
#include "mischelp.h"
/* The definition of the structure is private, we only need it here,
so it can be allocated on the stack. */
struct private_membuf_s
{
size_t len;
size_t size;
char *buf;
int out_of_core;
};
typedef struct private_membuf_s membuf_t;
/* Return the current length of the membuf. */
#define get_membuf_len(a) ((a)->len)
#define is_membuf_ready(a) ((a)->buf || (a)->out_of_core)
#define MEMBUF_ZERO { 0, 0, NULL, 0}
void init_membuf (membuf_t *mb, int initiallen);
void init_membuf_secure (membuf_t *mb, int initiallen);
void clear_membuf (membuf_t *mb, size_t amount);
void put_membuf (membuf_t *mb, const void *buf, size_t len);
gpg_error_t put_membuf_cb (void *opaque, const void *buf, size_t len);
void put_membuf_str (membuf_t *mb, const char *string);
void put_membuf_printf (membuf_t *mb, const char *format,
...) GPGRT_ATTR_PRINTF(2,3);
void *get_membuf (membuf_t *mb, size_t *len);
void *get_membuf_shrink (membuf_t *mb, size_t *len);
const void *peek_membuf (membuf_t *mb, size_t *len);
#endif /*GNUPG_COMMON_MEMBUF_H*/
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