| commit | author | age | ||
| 29b331 | 1 | /******************************************************************************** |
| GW | 2 | * Copyright: (C) 2020 LingYun IoT System Studio |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * Filename: database.c | |
| 6 | * Description: This library used to operate blob packet in sqlite database. | |
| 7 | * | |
| 8 | * Version: 1.0.0(2020年05月13日) | |
| 9 | * Author: Guo Wenxue <guowenxue@gmail.com> | |
| 10 | * ChangeLog: 1, Release initial version on "2020年05月13日 12时14分23秒" | |
| 11 | * | |
| 12 | ********************************************************************************/ | |
| 13 | ||
| 14 | #include <stdio.h> | |
| 15 | #include <stdlib.h> | |
| 16 | #include <unistd.h> | |
| 17 | #include <string.h> | |
| 18 | #include "database.h" | |
| 19 | #include "logger.h" | |
| 20 | ||
| 21 | /* Blob packet table name */ | |
| 22 | #define TABLE_NAME "PackTable" | |
| 23 | ||
| 24 | /* Use static global handler here in order to simplify the API, | |
| 25 | * But it will make this library not thread safe | |
| 26 | */ | |
| 27 | static sqlite3 *s_clidb = NULL; | |
| 28 | ||
| 29 | ||
| 30 | /* description: open or create sqlite database if not exist | |
| 31 | * input args: | |
| 32 | * $db_file: sqlite database file name | |
| 33 | * return value: <0: failure 0:ok | |
| 34 | * */ | |
| 35 | int database_init(const char *db_file) | |
| 36 | { | |
| 37 | char sql[SQL_COMMAND_LEN]={0}; | |
| 38 | char *errmsg = NULL; | |
| 39 | ||
| 40 | if( !db_file ) | |
| 41 | { | |
| 42 | log_error("%s() Invalid input arguments\n", __func__); | |
| 43 | return -1; | |
| 44 | } | |
| 45 | ||
| 46 | /*+------------------------------------------+ | |
| 47 | *| database already exist, just open it | | |
| 48 | *+------------------------------------------+*/ | |
| 49 | if( 0==access(db_file, F_OK) ) | |
| 50 | { | |
| 51 | if( SQLITE_OK != sqlite3_open(db_file, &s_clidb) ) | |
| 52 | { | |
| 53 | log_error("open database file '%s' failure\n", db_file); | |
| 54 | return -2; | |
| 55 | } | |
| 56 | log_info("open database file '%s' ok\n", db_file); | |
| 57 | return 0; | |
| 58 | } | |
| 59 | ||
| 60 | /*+-----------------------------------------+ | |
| 61 | *| database not exist, create and init it | | |
| 62 | *+-----------------------------------------+*/ | |
| 63 | ||
| 64 | if( SQLITE_OK != sqlite3_open(db_file, &s_clidb) ) | |
| 65 | { | |
| 66 | log_error("create database file '%s' failure\n", db_file); | |
| 67 | return -2; | |
| 68 | } | |
| 69 | ||
| 70 | /* SQLite continues without syncing as soon as it has handed data off to the operating system */ | |
| 71 | sqlite3_exec(s_clidb, "pragma synchronous = OFF; ", NULL, NULL, NULL); | |
| 72 | ||
| 73 | /* enable full auto vacuum, Auto increase/decrease */ | |
| 74 | sqlite3_exec(s_clidb, "pragma auto_vacuum = 2 ; ", NULL, NULL, NULL); | |
| 75 | ||
| 76 | /* Create firehost table in the database */ | |
| 77 | snprintf(sql, sizeof(sql), "CREATE TABLE %s(packet BLOB);", TABLE_NAME); | |
| 78 | if( SQLITE_OK != sqlite3_exec(s_clidb, sql, NULL, NULL, &errmsg) ) | |
| 79 | { | |
| 80 | log_error("create data_table in database file '%s' failure: %s\n", db_file, errmsg); | |
| 81 | sqlite3_free(errmsg); /* free errmsg */ | |
| 82 | sqlite3_close(s_clidb); /* close databse */ | |
| 83 | unlink(db_file); /* remove database file */ | |
| 84 | return -3; | |
| 85 | } | |
| 86 | ||
| 87 | log_info("create and init database file '%s' ok\n", db_file); | |
| 88 | return 0; | |
| 89 | } | |
| 90 | ||
| 91 | ||
| 92 | /* description: close sqlite database handler | |
| 93 | * return value: none | |
| 94 | */ | |
| 95 | void database_term(void) | |
| 96 | { | |
| 97 | log_warn("close sqlite database now\n"); | |
| 98 | sqlite3_close(s_clidb); | |
| 99 | ||
| 100 | return ; | |
| 101 | } | |
| 102 | ||
| 103 | ||
| 104 | /* description: push a blob packet into database | |
| 105 | * input args: | |
| 106 | * $pack: blob packet data address | |
| 107 | * $size: blob packet data bytes | |
| 108 | * return value: <0: failure 0:ok | |
| 109 | */ | |
| 110 | int database_push_packet(void *pack, int size) | |
| 111 | { | |
| 112 | char sql[SQL_COMMAND_LEN]={0}; | |
| 113 | int rv = 0; | |
| 114 | sqlite3_stmt *stat = NULL; | |
| 115 | ||
| 116 | if( !pack || size<=0 ) | |
| 117 | { | |
| 118 | log_error("%s() Invalid input arguments\n", __func__); | |
| 119 | return -1; | |
| 120 | } | |
| 121 | ||
| 122 | if( ! s_clidb ) | |
| 123 | { | |
| 124 | log_error("sqlite database not opened\n"); | |
| 125 | return -2; | |
| 126 | } | |
| 127 | ||
| bffa2b | 128 | snprintf(sql, sizeof(sql), "INSERT INTO %s(packet) VALUES(?)", TABLE_NAME); |
| 29b331 | 129 | rv = sqlite3_prepare_v2(s_clidb, sql, -1, &stat, NULL); |
| GW | 130 | if(SQLITE_OK!=rv || !stat) |
| 131 | { | |
| 132 | log_error("blob add sqlite3_prepare_v2 failure\n"); | |
| 133 | rv = -2; | |
| 134 | goto OUT; | |
| 135 | } | |
| 136 | ||
| 137 | if( SQLITE_OK != sqlite3_bind_blob(stat, 1, pack, size, NULL) ) | |
| 138 | { | |
| 139 | log_error("blob add sqlite3_bind_blob failure\n"); | |
| 140 | rv = -3; | |
| 141 | goto OUT; | |
| 142 | } | |
| 143 | ||
| 144 | rv = sqlite3_step(stat); | |
| 145 | if( SQLITE_DONE!=rv && SQLITE_ROW!=rv ) | |
| 146 | { | |
| 147 | log_error("blob add sqlite3_step failure\n"); | |
| 148 | rv = -4; | |
| 149 | goto OUT; | |
| 150 | } | |
| 151 | ||
| 152 | OUT: | |
| 153 | sqlite3_finalize(stat); | |
| 154 | ||
| 155 | if( rv < 0 ) | |
| 156 | log_error("add new blob packet into database failure, rv=%d\n", rv); | |
| 157 | else | |
| 158 | log_info("add new blob packet into database ok\n"); | |
| 159 | ||
| 160 | return rv; | |
| 161 | } | |
| 162 | ||
| 163 | ||
| 164 | /* description: pop the first blob packet from database | |
| 165 | * input args: | |
| 166 | * $pack: blob packet output buffer address | |
| 167 | * $size: blob packet output buffer size | |
| 168 | * $byte: blob packet bytes | |
| 169 | * return value: <0: failure 0:ok | |
| 170 | */ | |
| 171 | int database_pop_packet(void *pack, int size, int *bytes) | |
| 172 | { | |
| 173 | char sql[SQL_COMMAND_LEN]={0}; | |
| 174 | int rv = 0; | |
| 175 | sqlite3_stmt *stat = NULL; | |
| 176 | const void *blob_ptr; | |
| 177 | ||
| 178 | if( !pack || size<=0 ) | |
| 179 | { | |
| 180 | log_error("%s() Invalid input arguments\n", __func__); | |
| 181 | return -1; | |
| 182 | } | |
| 183 | ||
| 184 | if( ! s_clidb ) | |
| 185 | { | |
| 186 | log_error("sqlite database not opened\n"); | |
| 187 | return -2; | |
| 188 | } | |
| 189 | ||
| 190 | /* Only query the first packet record */ | |
| bffa2b | 191 | snprintf(sql, sizeof(sql), "SELECT packet FROM %s WHERE rowid = (SELECT rowid FROM %s LIMIT 1);", TABLE_NAME, TABLE_NAME); |
| 29b331 | 192 | rv = sqlite3_prepare_v2(s_clidb, sql, -1, &stat, NULL); |
| GW | 193 | if(SQLITE_OK!=rv || !stat) |
| 194 | { | |
| 195 | log_error("firehost sqlite3_prepare_v2 failure\n"); | |
| 196 | rv = -3; | |
| 197 | goto out; | |
| 198 | } | |
| 199 | ||
| 200 | rv = sqlite3_step(stat); | |
| 201 | if( SQLITE_DONE!=rv && SQLITE_ROW!=rv ) | |
| 202 | { | |
| 203 | log_error("firehost sqlite3_step failure\n"); | |
| 204 | rv = -5; | |
| 205 | goto out; | |
| 206 | } | |
| 207 | ||
| 208 | /* 1rd argument<0> means first segement is packet */ | |
| 209 | blob_ptr = sqlite3_column_blob(stat, 0); | |
| 210 | if( !blob_ptr ) | |
| 211 | { | |
| 212 | rv = -6; | |
| 213 | goto out; | |
| 214 | } | |
| 215 | ||
| 216 | *bytes = sqlite3_column_bytes(stat, 0); | |
| 217 | ||
| 218 | if( *bytes > size ) | |
| 219 | { | |
| 220 | log_error("blob packet bytes[%d] larger than bufsize[%d]\n", *bytes, size); | |
| 221 | *bytes = 0; | |
| 222 | rv = -1; | |
| 223 | } | |
| 224 | ||
| 225 | memcpy(pack, blob_ptr, *bytes); | |
| 226 | rv = 0; | |
| 227 | ||
| 228 | out: | |
| 229 | sqlite3_finalize(stat); | |
| 230 | return rv; | |
| 231 | } | |
| 232 | ||
| 233 | ||
| 234 | /* description: remove the first blob packet from database | |
| 235 | * input args: none | |
| 236 | * return value: <0: failure 0:ok | |
| 237 | */ | |
| 238 | int database_del_packet(void) | |
| 239 | { | |
| 240 | char sql[SQL_COMMAND_LEN]={0}; | |
| 241 | char *errmsg = NULL; | |
| 242 | ||
| 243 | if( ! s_clidb ) | |
| 244 | { | |
| 245 | log_error("sqlite database not opened\n"); | |
| 246 | return -2; | |
| 247 | } | |
| 248 | ||
| 249 | /* remove packet from db */ | |
| 250 | memset(sql, 0, sizeof(sql)); | |
| bffa2b | 251 | snprintf(sql, sizeof(sql), "DELETE FROM %s WHERE rowid = (SELECT rowid FROM %s LIMIT 1);", TABLE_NAME, TABLE_NAME); |
| 29b331 | 252 | if( SQLITE_OK != sqlite3_exec(s_clidb, sql, NULL, 0, &errmsg) ) |
| GW | 253 | { |
| 254 | log_error("delete first blob packet from database failure: %s\n", errmsg); | |
| 255 | sqlite3_free(errmsg); | |
| 256 | return -2; | |
| 257 | } | |
| 258 | log_warn("delete first blob packet from database ok\n"); | |
| 259 | ||
| 260 | /* Vacuum the database */ | |
| 261 | sqlite3_exec(s_clidb, "VACUUM;", NULL, 0, NULL); | |
| 262 | ||
| 263 | return 0; | |
| 264 | } | |
| 265 | ||
