99 lines
2.2 KiB
C
99 lines
2.2 KiB
C
#ifndef __KVS_RW_TOOLS_H__
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#define __KVS_RW_TOOLS_H__
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#include <stdint.h>
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#include <stdio.h>
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//
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int kvs_need(const uint8_t *p, const uint8_t *end, size_t n);
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int kvs_read_u8(const uint8_t **pp, const uint8_t *end, uint8_t *out);
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int kvs_read_u16(const uint8_t **pp, const uint8_t *end, uint16_t *out);
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int kvs_read_u32(const uint8_t **pp, const uint8_t *end, uint32_t *out);
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int kvs_write_u8(uint8_t **pp, const uint8_t *end, uint8_t v);
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int kvs_write_u16(uint8_t **pp, const uint8_t *end, uint16_t v);
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int kvs_write_u32(uint8_t **pp, const uint8_t *end, uint32_t v);
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int kvs_write_file(FILE *fp, const void *buf, size_t n);
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int kvs_read_file(FILE *fp, void *buf, size_t n);
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int write_full(int fd, const void *buf, size_t len);
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int read_full(int fd, void *buf, size_t n);
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/**
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* Request
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* Cmd: | OP(1) | argc(1) | repeat { arglen(4) | arg } |
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*
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* Response
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* Rsp: | OP(1) | status(1) | datalen(4) | data |
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*/
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// 1MB
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#define KVS_MAX_RESPONSE (65536)
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#define KVS_MAX_ARGLEN (507)
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#define KVS_MAX_CMD_BYTES (1024)
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#define KVS_MAX_ARGC 3
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enum {
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KVS_STATUS_OK = 0,
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KVS_STATUS_ERROR = 1,
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KVS_STATUS_NO_EXIST = 2,
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KVS_STATUS_EXIST = 3,
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KVS_STATUS_BADREQ = 4
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};
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typedef enum {
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KVS_CMD_START = 0,
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// array
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KVS_CMD_SET = KVS_CMD_START,
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KVS_CMD_GET,
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KVS_CMD_DEL,
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KVS_CMD_MOD,
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KVS_CMD_EXIST,
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// rbtree
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KVS_CMD_RSET,
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KVS_CMD_RGET,
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KVS_CMD_RDEL,
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KVS_CMD_RMOD,
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KVS_CMD_REXIST,
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// hash
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KVS_CMD_HSET,
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KVS_CMD_HGET,
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KVS_CMD_HDEL,
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KVS_CMD_HMOD,
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KVS_CMD_HEXIST,
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KVS_CMD_PSYNC,
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KVS_CMD_SAVE,
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KVS_CMD_COUNT,
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}kvs_cmd_t;
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typedef struct kvs_arg_s{
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uint32_t len;
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const uint8_t *data;
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} kvs_arg_t;
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typedef struct kvs_req_s{
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kvs_cmd_t op;
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uint8_t argc;
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kvs_arg_t *args;
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}kvs_req_t;
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typedef struct kvs_rsp_s{
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kvs_cmd_t op;
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uint8_t status;
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uint32_t dlen;
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const uint8_t *data;
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} kvs_rsp_t;
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int kvs_parse_one_cmd(const uint8_t *request, int request_length, kvs_req_t *req_out);
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void kvs_free_request(kvs_req_t *req);
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int kvs_execute_one_cmd(const kvs_req_t *req, kvs_rsp_t *rsp_out);
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int kvs_build_one_rsp(const kvs_rsp_t *results, uint8_t *response, size_t response_cap);
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int kvs_save_to_file();
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int kvs_save_cmd_to_logfile(const uint8_t *cmd, size_t len, int logfd);
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int kvs_replay_log(const char *logfile, int logfd);
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int ksv_clear_log(int logfd);
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#endif
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