[lttng-modules.git] / include / lttng / msgpack.h

/* SPDX-License-Identifier: LGPL-2.1-only
 * SPDX-FileCopyrightText: 2020 Francis Deslauriers <francis.deslauriers@efficios.com>
 */

#ifndef _LTTNG_KERNEL_MSGPACK_H
#define _LTTNG_KERNEL_MSGPACK_H

#ifdef __KERNEL__
#include <linux/types.h>
#else /* __KERNEL__ */
#include <stdint.h>
#endif /* __KERNEL__ */

struct lttng_msgpack_writer {
	uint8_t *buffer;
	uint8_t *write_pos;
	const uint8_t *end_write_pos;
	uint8_t array_nesting;
	uint8_t map_nesting;
};

void lttng_msgpack_writer_init(
		struct lttng_msgpack_writer *writer,
		uint8_t *buffer, size_t size);

void lttng_msgpack_writer_fini(struct lttng_msgpack_writer *writer);

int lttng_msgpack_write_nil(struct lttng_msgpack_writer *writer);
int lttng_msgpack_write_true(struct lttng_msgpack_writer *writer);
int lttng_msgpack_write_false(struct lttng_msgpack_writer *writer);
int lttng_msgpack_write_unsigned_integer(
		struct lttng_msgpack_writer *writer, uint64_t value);
int lttng_msgpack_write_signed_integer(
		struct lttng_msgpack_writer *writer, int64_t value);
int lttng_msgpack_write_str(struct lttng_msgpack_writer *writer,
		const char *value);
int lttng_msgpack_write_user_str(struct lttng_msgpack_writer *writer,
		const char __user *value);
int lttng_msgpack_begin_map(struct lttng_msgpack_writer *writer, size_t count);
int lttng_msgpack_end_map(struct lttng_msgpack_writer *writer);
int lttng_msgpack_begin_array(
		struct lttng_msgpack_writer *writer, size_t count);
int lttng_msgpack_end_array(struct lttng_msgpack_writer *writer);

int lttng_msgpack_save_writer_pos(struct lttng_msgpack_writer *writer, uint8_t **pos);
int lttng_msgpack_restore_writer_pos(struct lttng_msgpack_writer *writer, uint8_t *pos);

#endif /* _LTTNG_KERNEL_MSGPACK_H */
Commit	Line	Data
	1	/* SPDX-License-Identifier: LGPL-2.1-only
	2	* SPDX-FileCopyrightText: 2020 Francis Deslauriers <francis.deslauriers@efficios.com>
	3	*/
	4
	5	#ifndef _LTTNG_KERNEL_MSGPACK_H
	6	#define _LTTNG_KERNEL_MSGPACK_H
	7
	8	#ifdef __KERNEL__
	9	#include <linux/types.h>
	10	#else /* __KERNEL__ */
	11	#include <stdint.h>
	12	#endif /* __KERNEL__ */
	13
	14	struct lttng_msgpack_writer {
	15	uint8_t *buffer;
	16	uint8_t *write_pos;
	17	const uint8_t *end_write_pos;
	18	uint8_t array_nesting;
	19	uint8_t map_nesting;
	20	};
	21
	22	void lttng_msgpack_writer_init(
	23	struct lttng_msgpack_writer *writer,
	24	uint8_t *buffer, size_t size);
	25
	26	void lttng_msgpack_writer_fini(struct lttng_msgpack_writer *writer);
	27
	28	int lttng_msgpack_write_nil(struct lttng_msgpack_writer *writer);
	29	int lttng_msgpack_write_true(struct lttng_msgpack_writer *writer);
	30	int lttng_msgpack_write_false(struct lttng_msgpack_writer *writer);
	31	int lttng_msgpack_write_unsigned_integer(
	32	struct lttng_msgpack_writer *writer, uint64_t value);
	33	int lttng_msgpack_write_signed_integer(
	34	struct lttng_msgpack_writer *writer, int64_t value);
	35	int lttng_msgpack_write_str(struct lttng_msgpack_writer *writer,
	36	const char *value);
	37	int lttng_msgpack_write_user_str(struct lttng_msgpack_writer *writer,
	38	const char __user *value);
	39	int lttng_msgpack_begin_map(struct lttng_msgpack_writer *writer, size_t count);
	40	int lttng_msgpack_end_map(struct lttng_msgpack_writer *writer);
	41	int lttng_msgpack_begin_array(
	42	struct lttng_msgpack_writer *writer, size_t count);
	43	int lttng_msgpack_end_array(struct lttng_msgpack_writer *writer);
	44
	45	int lttng_msgpack_save_writer_pos(struct lttng_msgpack_writer writer, uint8_t *pos);
	46	int lttng_msgpack_restore_writer_pos(struct lttng_msgpack_writer writer, uint8_t pos);
	47
	48	#endif /* _LTTNG_KERNEL_MSGPACK_H */