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/**
* The state module is responsible for parsing the Tox save data format and for
* saving state in that format.
*
* This module provides functions for iterating over serialised data sections
* and reading/writing numbers in the correct format (little endian).
*
* Note that unlike the Tox network protocol, the save data stores its values in
* little endian, which is native to most desktop and server architectures in
* 2018.
*/
#ifndef C_TOXCORE_TOXCORE_STATE_H
#define C_TOXCORE_TOXCORE_STATE_H
#include "logger.h"
#ifdef __cplusplus
extern "C" {
#endif
#define STATE_COOKIE_GLOBAL 0x15ed1b1f
#define STATE_COOKIE_TYPE 0x01ce
typedef enum State_Type {
STATE_TYPE_NOSPAMKEYS = 1,
STATE_TYPE_DHT = 2,
STATE_TYPE_FRIENDS = 3,
STATE_TYPE_NAME = 4,
STATE_TYPE_STATUSMESSAGE = 5,
STATE_TYPE_STATUS = 6,
STATE_TYPE_TCP_RELAY = 10,
STATE_TYPE_PATH_NODE = 11,
STATE_TYPE_CONFERENCES = 20,
STATE_TYPE_END = 255,
} State_Type;
// Returned by the state_load_cb to instruct the loader on what to do next.
typedef enum State_Load_Status {
// Continue loading state data sections.
STATE_LOAD_STATUS_CONTINUE,
// An error occurred. Stop loading sections.
STATE_LOAD_STATUS_ERROR,
// We're at the end of the save data, terminate loading successfully.
STATE_LOAD_STATUS_END,
} State_Load_Status;
typedef State_Load_Status state_load_cb(void *outer, const uint8_t *data, uint32_t len, uint16_t type);
// state load/save
int state_load(const Logger *log, state_load_cb *state_load_callback, void *outer,
const uint8_t *data, uint32_t length, uint16_t cookie_inner);
uint8_t *state_write_section_header(uint8_t *data, uint16_t cookie_type, uint32_t len, uint32_t section_type);
// Utilities for state data serialisation.
uint16_t lendian_to_host16(uint16_t lendian);
uint16_t host_to_lendian16(uint16_t host);
void host_to_lendian_bytes64(uint8_t *dest, uint64_t num);
void lendian_bytes_to_host64(uint64_t *dest, const uint8_t *lendian);
void host_to_lendian_bytes32(uint8_t *dest, uint32_t num);
void lendian_bytes_to_host32(uint32_t *dest, const uint8_t *lendian);
void host_to_lendian_bytes16(uint8_t *dest, uint16_t num);
void lendian_bytes_to_host16(uint16_t *dest, const uint8_t *lendian);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // C_TOXCORE_TOXCORE_STATE_H
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