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/*
* buffer.h: SSH buffer
* Copyright (C) 2018 Iru Cai <mytbk920423@gmail.com>
*
* This library 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 2.1 of the License, or (at your option) any later version.
*
* This library 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 Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef BUFFER_H
#define BUFFER_H
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#ifdef __cplusplus
extern "C" {
#endif /* } */
typedef struct
{
uint8_t *p;
size_t alloc;
size_t offs;
size_t sz;
} buffer;
/* if success, return 1, otherwise return 0 */
int buffer_init(buffer *);
static inline void buffer_clear(buffer *b) { b->offs = b->sz = 0; }
static inline void buffer_deinit(buffer *b) { free(b->p); }
static inline uint8_t *buffer_data(buffer *b) { return b->p + b->offs; }
static inline size_t buffer_len(buffer *b) { return b->sz; }
int buffer_append(buffer *b, const uint8_t *s, size_t len);
int buffer_append_string(buffer *b, const char *s, size_t len);
int buffer_append_byte(buffer *b, uint8_t);
int buffer_append_be16(buffer *b, uint16_t);
int buffer_append_be32(buffer *b, uint32_t);
/* the following functions doesn't check on buffer size */
static inline void buffer_consume(buffer *b, size_t L)
{
b->offs += L;
b->sz -= L;
}
void buffer_get(buffer *b, uint8_t *s, size_t len);
uint32_t buffer_get_u32(buffer *b);
uint16_t buffer_get_u16(buffer *b);
uint8_t buffer_get_u8(buffer *b);
#ifdef __cplusplus
}
#endif
#endif
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