-
Dmitriy A. Gerasimov authored
[!] Repaired sqlite enginge for GlobalDB
e50d3d40
dap_chain_global_db_driver_sqlite.c 26.52 KiB
/*
* Authors:
* Dmitriy A. Gearasimov <gerasimov.dmitriy@demlabs.net>
* Alexander Lysikov <alexander.lysikov@demlabs.net>
* DeM Labs Inc. https://demlabs.net
* CellFrame https://cellframe.net
* Sources https://gitlab.demlabs.net/cellframe
* Copyright (c) 2017-2019
* All rights reserved.
This file is part of CellFrame SDK the open source project
CellFrame SDK is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
CellFrame SDK 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with any CellFrame SDK based project. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stddef.h>
#include <string.h>
#ifdef DAP_OS_UNIX
#include <unistd.h>
#endif
#include "dap_common.h"
#include "dap_hash.h"
#include "dap_strfuncs.h"
#include "dap_chain_global_db_driver_sqlite.h"
#define LOG_TAG "db_sqlite"
static sqlite3 *s_db = NULL;
static char *s_filename_db = NULL;
// Value of one field in the table
typedef struct _SQLITE_VALUE_
{
int32_t len;
char type;
/*
#define SQLITE_INTEGER 1
#define SQLITE_FLOAT 2
#define SQLITE_TEXT 3
#define SQLITE_BLOB 4
#define SQLITE_NULL 5
*/
uint8_t reserv[3];
union
{
int val_int;
long long val_int64;
double val_float;
const char *val_str;
const unsigned char *val_blob;
} val;
} SQLITE_VALUE;
// Content of one row in the table
typedef struct _SQLITE_ROW_VALUE_
{
int count; // number of columns in a row
int reserv;
SQLITE_VALUE *val; // array of field values} SQLITE_ROW_VALUE;
static int dap_db_driver_sqlite_exec(sqlite3 *l_db, const char *l_query, char **l_error_message);
/**
* SQLite library initialization, no thread safe
*
* return 0 if Ok, else error code >0
*/
int dap_db_driver_sqlite_init(const char *a_filename_db, dap_db_driver_callbacks_t *a_drv_callback)
{
int l_ret = -1;
if(sqlite3_threadsafe() && !sqlite3_config(SQLITE_CONFIG_SERIALIZED))
l_ret = sqlite3_initialize();
if(l_ret != SQLITE_OK) {
log_it(L_ERROR, "Can't init sqlite err=%d", l_ret);
return l_ret;
}
char *l_error_message = NULL;
s_db = dap_db_driver_sqlite_open(a_filename_db, SQLITE_OPEN_READWRITE, &l_error_message);
if(!s_db) {
log_it(L_ERROR, "Can't init sqlite err=%d", l_error_message);
dap_db_driver_sqlite_free(l_error_message);
}
else {
if(!dap_db_driver_sqlite_set_pragma(s_db, "synchronous", "NORMAL")) // 0 | OFF | 1 | NORMAL | 2 | FULL
printf("can't set new synchronous mode\n");
if(!dap_db_driver_sqlite_set_pragma(s_db, "journal_mode", "OFF")) // DELETE | TRUNCATE | PERSIST | MEMORY | WAL | OFF
printf("can't set new journal mode\n");
if(!dap_db_driver_sqlite_set_pragma(s_db, "page_size", "1024")) // DELETE | TRUNCATE | PERSIST | MEMORY | WAL | OFF
printf("can't set page_size\n");
// *PRAGMA page_size = bytes; // page size DB; it is reasonable to make it equal to the size of the disk cluster 4096
// *PRAGMA cache_size = -kibibytes; // by default it is equal to 2000 pages of database
//
a_drv_callback->apply_store_obj = dap_db_driver_sqlite_apply_store_obj;
a_drv_callback->read_store_obj = dap_db_driver_sqlite_read_store_obj;
a_drv_callback->read_cond_store_obj = dap_db_driver_sqlite_read_cond_store_obj;
a_drv_callback->read_last_store_obj = dap_db_driver_sqlite_read_last_store_obj;
a_drv_callback->transaction_start = dap_db_driver_sqlite_start_transaction;
a_drv_callback->transaction_end = dap_db_driver_sqlite_end_transaction;
a_drv_callback->deinit = dap_db_driver_sqlite_deinit;
a_drv_callback->flush = dap_db_driver_sqlite_flush;
s_filename_db = strdup(a_filename_db);
}
return l_ret;
}
int dap_db_driver_sqlite_deinit(void)
{
dap_db_driver_sqlite_close(s_db);
s_db = NULL;
return sqlite3_shutdown();
}
// additional function for sqlite to convert byte to number
static void byte_to_bin(sqlite3_context *l_context, int a_argc, sqlite3_value **a_argv)
{
const unsigned char *l_text;
if(a_argc != 1)
sqlite3_result_null(l_context);
l_text = (const unsigned char *) sqlite3_value_blob(a_argv[0]);
if(l_text && l_text[0])
{
int l_result = (int) l_text[0];
sqlite3_result_int(l_context, l_result);
return;
}
sqlite3_result_null(l_context);
}
/**
* Open SQLite database
* a_filename_utf8 - database file name
* a_flags - database access flags (SQLITE_OPEN_READONLY, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE)
* a_error_message[out] - Error messages (the memory requires deletion via sqlite_free ())
*
* return: database identifier, NULL when an error occurs.
*/
sqlite3* dap_db_driver_sqlite_open(const char *a_filename_utf8, int a_flags, char **a_error_message)
{
sqlite3 *l_db = NULL;
int l_rc = sqlite3_open_v2(a_filename_utf8, &l_db, a_flags | SQLITE_OPEN_FULLMUTEX, NULL);
// if unable to open the database file
if(l_rc == SQLITE_CANTOPEN) {
sqlite3_close(l_db);
// try to create database
l_rc = sqlite3_open_v2(a_filename_utf8, &l_db, a_flags | SQLITE_OPEN_FULLMUTEX | SQLITE_OPEN_CREATE, NULL);
}
if(l_rc != SQLITE_OK)
{
if(a_error_message)
*a_error_message = sqlite3_mprintf("Can't open database: %s\n", sqlite3_errmsg(l_db));
sqlite3_close(l_db);
return NULL;
}
// added user functions
sqlite3_create_function(l_db, "byte_to_bin", 1, SQLITE_UTF8, NULL, &byte_to_bin, NULL, NULL);
return l_db;
}
/**
* Close the database
*/
void dap_db_driver_sqlite_close(sqlite3 *l_db)
{
if(l_db)
sqlite3_close(l_db);
}
/*
* Clear the memory allocated via sqlite3_mprintf()
*/
void dap_db_driver_sqlite_free(char *memory)
{
if(memory)
sqlite3_free(memory);
}
/**
* Set specific pragma statements
* www.sqlite.org/pragma.html
*
*PRAGMA page_size = bytes; // page size DB; it is reasonable to make it equal to the size of the disk cluster 4096
*PRAGMA cache_size = -kibibytes; // by default it is equal to 2000 pages of database
*PRAGMA encoding = "UTF-8"; // default = UTF-8
*PRAGMA foreign_keys = 1; // default = 0
*PRAGMA journal_mode = DELETE | TRUNCATE | PERSIST | MEMORY | WAL | OFF;
*PRAGMA synchronous = 0 | OFF | 1 | NORMAL | 2 | FULL;
*/
bool dap_db_driver_sqlite_set_pragma(sqlite3 *a_db, char *a_param, char *a_mode)
{
if(!a_param || !a_mode)
{
printf("[sqlite_set_pragma] err!!! no param or mode\n");
return false;
}
char *l_str_query = sqlite3_mprintf("PRAGMA %s = %s", a_param, a_mode);
int l_rc = dap_db_driver_sqlite_exec(a_db, l_str_query, NULL); // default synchronous=FULL
sqlite3_free(l_str_query); if(l_rc == SQLITE_OK)
return true;
return false;
}
int dap_db_driver_sqlite_flush()
{
log_it(L_DEBUG, "Start flush sqlite data base.");
dap_db_driver_sqlite_close(s_db);
char *l_error_message;
s_db = dap_db_driver_sqlite_open(s_filename_db, SQLITE_OPEN_READWRITE, &l_error_message);
if(!s_db) {
log_it(L_ERROR, "Can't init sqlite err=%d", l_error_message);
dap_db_driver_sqlite_free(l_error_message);
return -3;
}
#ifndef _WIN32
sync();
#endif
if(!dap_db_driver_sqlite_set_pragma(s_db, "synchronous", "NORMAL")) // 0 | OFF | 1 | NORMAL | 2 | FULL
log_it(L_WARNING, "Can't set new synchronous mode\n");
if(!dap_db_driver_sqlite_set_pragma(s_db, "journal_mode", "OFF")) // DELETE | TRUNCATE | PERSIST | MEMORY | WAL | OFF
log_it(L_WARNING, "Can't set new journal mode\n");
if(!dap_db_driver_sqlite_set_pragma(s_db, "page_size", "1024")) // DELETE | TRUNCATE | PERSIST | MEMORY | WAL | OFF
log_it(L_WARNING, "Can't set page_size\n");
return 0;
}
/**
* Execute SQL query to database that does not return data
*
* return 0 if Ok, else error code >0
*/
static int dap_db_driver_sqlite_exec(sqlite3 *l_db, const char *l_query, char **l_error_message)
{
char *l_zErrMsg = NULL;
int l_rc = sqlite3_exec(l_db, l_query, NULL, 0, &l_zErrMsg);
//printf("%s\n",l_query);
if(l_rc != SQLITE_OK)
{
if(l_error_message && l_zErrMsg)
*l_error_message = sqlite3_mprintf("SQL error: %s", l_zErrMsg);
if(l_zErrMsg)
sqlite3_free(l_zErrMsg);
return l_rc;
}
if(l_zErrMsg)
sqlite3_free(l_zErrMsg);
return l_rc;
}
/**
* Create table
*
* return 0 if Ok, else error code
*/
static int dap_db_driver_sqlite_create_group_table(const char *a_table_name)
{
char *l_error_message = NULL;
if(!s_db || !a_table_name)
return -1;
char *l_query =
dap_strdup_printf(
"create table if not exists '%s'(id INTEGER NOT NULL PRIMARY KEY, key TEXT KEY, hash BLOB, ts INTEGER KEY, value BLOB)",
a_table_name);
if(dap_db_driver_sqlite_exec(s_db, (const char*) l_query, &l_error_message) != SQLITE_OK)
{
log_it(L_ERROR, "Creatу_table : %s\n", l_error_message);
dap_db_driver_sqlite_free(l_error_message); DAP_DELETE(l_query);
return -1;
}
DAP_DELETE(l_query);
// create unique index - key
l_query = dap_strdup_printf("create unique index if not exists 'idx_key_%s' ON '%s' (key)", a_table_name,
a_table_name);
if(dap_db_driver_sqlite_exec(s_db, (const char*) l_query, &l_error_message) != SQLITE_OK) {
log_it(L_ERROR, "Create unique index : %s\n", l_error_message);
dap_db_driver_sqlite_free(l_error_message);
DAP_DELETE(l_query);
return -1;
}
DAP_DELETE(l_query);
return 0;
}
/**
* Prepare SQL query for database
* l_query [in] SQL-string with a query to database, example:
* SELECT * FROM data
* SELECT id, sd FROM data LIMIT 300
* SELECT id, sd FROM data ORDER BY id ASC/DESC
* SELECT * FROM data WHERE time>449464766900000 and time<449464766910000"
* SELECT * FROM data WHERE hex(sd) LIKE '%370%'
* hex(x'0806') -> '08f6' или quote(sd) -> X'08f6'
* substr(x'031407301210361320690000',3,2) -> x'0730'
*
* CAST(substr(sd,5,2) as TEXT)
* additional function of line to number _uint8
* byte_to_bin(x'ff') -> 255
*/
static int dap_db_driver_sqlite_query(sqlite3 *db, char *query, sqlite3_stmt **l_res, char **l_error_message)
{
const char *pzTail; // OUT: Pointer to unused portion of zSql
int l_rc = sqlite3_prepare_v2(db, query, -1, l_res, &pzTail);
if(l_rc != SQLITE_OK)
{
if(l_error_message)
{
const char *zErrMsg = sqlite3_errmsg(db);
if(zErrMsg)
*l_error_message = sqlite3_mprintf("SQL Query error: %s\n", zErrMsg);
}
return l_rc;
}
return l_rc;
}
/**
* Clear memory after fetching a string
*
* return 0 if Ok, else -1
*/
static void dap_db_driver_sqlite_row_free(SQLITE_ROW_VALUE *row)
{
if(row) {
// delete the whole string
sqlite3_free(row->val);
// delete structure
sqlite3_free(row);
}
}
/**
* Selects the next entry from the result of the query and returns an array
*
* l_res: identifier received in sqlite_query ()
* l_row_out [out]: pointer to a column or NULL
* * return:
* SQLITE_ROW(100) has another row ready
* SQLITE_DONE(101) finished executing,
* SQLITE_CONSTRAINT(19) data is not unique and will not be added
*/
static int dap_db_driver_sqlite_fetch_array(sqlite3_stmt *l_res, SQLITE_ROW_VALUE **l_row_out)
{
SQLITE_ROW_VALUE *l_row = NULL;
// go to next the string
int l_rc = sqlite3_step(l_res);
if(l_rc == SQLITE_ROW) // SQLITE_ROW(100) or SQLITE_DONE(101) or SQLITE_BUSY(5)
{
int l_iCol; // number of the column in the row
// allocate memory for a row with data
l_row = (SQLITE_ROW_VALUE*) sqlite3_malloc(sizeof(SQLITE_ROW_VALUE));
int l_count = sqlite3_column_count(l_res); // get the number of columns
// allocate memory for all columns
l_row->val = (SQLITE_VALUE*) sqlite3_malloc(l_count * (int)sizeof(SQLITE_VALUE));
if(l_row->val)
{
l_row->count = l_count; // number of columns
for(l_iCol = 0; l_iCol < l_row->count; l_iCol++)
{
SQLITE_VALUE *cur_val = l_row->val + l_iCol;
cur_val->len = sqlite3_column_bytes(l_res, l_iCol); // how many bytes will be needed
cur_val->type = (signed char)sqlite3_column_type(l_res, l_iCol); // field type
if(cur_val->type == SQLITE_INTEGER)
{
cur_val->val.val_int64 = sqlite3_column_int64(l_res, l_iCol);
cur_val->val.val_int = sqlite3_column_int(l_res, l_iCol);
}
else if(cur_val->type == SQLITE_FLOAT)
cur_val->val.val_float = sqlite3_column_double(l_res, l_iCol);
else if(cur_val->type == SQLITE_BLOB)
cur_val->val.val_blob = (const unsigned char*) sqlite3_column_blob(l_res, l_iCol);
else if(cur_val->type == SQLITE_TEXT)
cur_val->val.val_str = (const char*) sqlite3_column_text(l_res, l_iCol); //sqlite3_mprintf("%s",sqlite3_column_text(l_res,iCol));
else
cur_val->val.val_str = NULL;
}
}
else
l_row->count = 0; // number of columns
}
if(l_row_out)
*l_row_out = l_row;
else
dap_db_driver_sqlite_row_free(l_row);
return l_rc;
}
/**
* Clear memory when request processing is complete
*/
static bool dap_db_driver_sqlite_query_free(sqlite3_stmt *l_res)
{
if(!l_res)
return false;
int rc = sqlite3_finalize(l_res);
if(rc != SQLITE_OK)
return false;
return true;
}
/**
* Convert the array into a string to save to blob
*/
static char* dap_db_driver_get_string_from_blob(uint8_t *blob, int len)
{
char *str_out; int ret;
if(!blob)
return NULL;
str_out = (char*) sqlite3_malloc(len * 2 + 1);
ret = (int)dap_bin2hex(str_out, (const void*)blob, (size_t)len);
str_out[len * 2] = 0;
return str_out;
}
/**
* Cleaning the database from the deleted data
*
* return 0 if Ok, else error code >0
*/
int dap_db_driver_sqlite_vacuum(sqlite3 *l_db)
{
if(!s_db)
return -1;
int l_rc = dap_db_driver_sqlite_exec(l_db, "VACUUM", NULL);
return l_rc;
}
/**
* Start a transaction
*/
int dap_db_driver_sqlite_start_transaction(void)
{
if(s_db)
{
if(SQLITE_OK == dap_db_driver_sqlite_exec(s_db, "BEGIN", NULL))
return 0;
else
return -1;
}
else
return -1;
}
/**
* End of transaction
*/
int dap_db_driver_sqlite_end_transaction(void)
{
if(s_db)
{
if(SQLITE_OK == dap_db_driver_sqlite_exec(s_db, "COMMIT", NULL))
return 0;
else
return -1;
}
else
return -1;
}
char *dap_db_driver_sqlite_make_table_name(const char *a_group_name)
{
char *l_group_name = dap_strdup(a_group_name);
ssize_t l_group_name_len = (ssize_t)dap_strlen(l_group_name);
const char *l_needle = ".";
// replace '.' to '_'
while(1){
char *l_str = dap_strstr_len(l_group_name, l_group_name_len, l_needle);
if(l_str)
*l_str = '_';
else
break;
}
return l_group_name;
}
/**
* Apply data (write or delete)
*
*/
int dap_db_driver_sqlite_apply_store_obj(dap_store_obj_t *a_store_obj)
{
if(!a_store_obj || !a_store_obj->group)
return -1;
char *l_query = NULL;
char *l_error_message = NULL;
if(a_store_obj->type == 'a') {
if(!a_store_obj->key || !a_store_obj->value || !a_store_obj->value_len)
return -1;
//dap_chain_hash_fast_t l_hash;
//dap_hash_fast(a_store_obj->value, a_store_obj->value_len, &l_hash);
char *l_blob_hash = "";//dap_db_driver_get_string_from_blob((uint8_t*) &l_hash, sizeof(dap_chain_hash_fast_t));
char *l_blob_value = dap_db_driver_get_string_from_blob(a_store_obj->value, (int)a_store_obj->value_len);
//add one record
char *table_name = dap_db_driver_sqlite_make_table_name(a_store_obj->group);
l_query = sqlite3_mprintf("insert into '%s' values(NULL, '%s', x'%s', '%lld', x'%s')",
table_name, a_store_obj->key, l_blob_hash, a_store_obj->timestamp, l_blob_value);
DAP_DELETE(table_name);
//dap_db_driver_sqlite_free(l_blob_hash);
dap_db_driver_sqlite_free(l_blob_value);
}
else if(a_store_obj->type == 'd') {
//delete one record
if(a_store_obj->key)
l_query = sqlite3_mprintf("delete from '%s' where key = '%s'",
a_store_obj->group, a_store_obj->key);
// remove all group
else{
char * l_table_name = dap_db_driver_sqlite_make_table_name(a_store_obj->group);
l_query = sqlite3_mprintf("drop table if exists '%s'", l_table_name);
DAP_DELETE(l_table_name);
}
}
else {
log_it(L_ERROR, "Unknown store_obj type '0x%x'", a_store_obj->type);
return -1;
}
// execute request
int l_ret = dap_db_driver_sqlite_exec(s_db, l_query, &l_error_message);
if(l_ret == SQLITE_ERROR) {
dap_db_driver_sqlite_free(l_error_message);
l_error_message = NULL;
// create table
char *table_name = dap_db_driver_sqlite_make_table_name(a_store_obj->group);
dap_db_driver_sqlite_create_group_table(table_name);
DAP_DELETE(table_name);
// repeat request
l_ret = dap_db_driver_sqlite_exec(s_db, l_query, &l_error_message);
}
// entry with the same hash is already present
if(l_ret == SQLITE_CONSTRAINT) {
dap_db_driver_sqlite_free(l_error_message);
l_error_message = NULL;
char *table_name = dap_db_driver_sqlite_make_table_name(a_store_obj->group);
//delete exist record
char *l_query_del = sqlite3_mprintf("delete from '%s' where key = '%s'", table_name, a_store_obj->key);
l_ret = dap_db_driver_sqlite_exec(s_db, l_query_del, &l_error_message);
DAP_DELETE(table_name);
dap_db_driver_sqlite_free(l_query_del);
if(l_ret != SQLITE_OK) {
log_it(L_INFO, "Entry with the same key is already present and can't delete, %s", l_error_message);
dap_db_driver_sqlite_free(l_error_message);
l_error_message = NULL; }
// repeat request
l_ret = dap_db_driver_sqlite_exec(s_db, l_query, &l_error_message);
}
// missing database
if(l_ret != SQLITE_OK) {
log_it(L_ERROR, "sqlite apply error: %s", l_error_message);
dap_db_driver_sqlite_free(l_error_message);
l_ret = -1;
}
dap_db_driver_sqlite_free(l_query);
return l_ret;
}
static void fill_one_item(const char *a_group, dap_store_obj_t *a_obj, SQLITE_ROW_VALUE *a_row)
{
a_obj->group = dap_strdup(a_group);
for(int l_iCol = 0; l_iCol < a_row->count; l_iCol++) {
SQLITE_VALUE *l_cur_val = a_row->val + l_iCol;
switch (l_iCol) {
case 0:
if(l_cur_val->type == SQLITE_INTEGER)
a_obj->id = (uint64_t)l_cur_val->val.val_int64;
break; // id
case 1:
if(l_cur_val->type == SQLITE_INTEGER)
a_obj->timestamp = l_cur_val->val.val_int64;
break; // ts
case 2:
if(l_cur_val->type == SQLITE_TEXT)
a_obj->key = dap_strdup(l_cur_val->val.val_str);
break; // key
case 3:
if(l_cur_val->type == SQLITE_BLOB)
{
a_obj->value_len = (size_t) l_cur_val->len;
a_obj->value = DAP_NEW_SIZE(uint8_t, a_obj->value_len);
memcpy(a_obj->value, l_cur_val->val.val_blob, a_obj->value_len);
}
break; // value
}
}
}
/**
* Read last items
*
* a_group - group name
*/
dap_store_obj_t* dap_db_driver_sqlite_read_last_store_obj(const char *a_group)
{
dap_store_obj_t *l_obj = NULL;
char *l_error_message = NULL;
sqlite3_stmt *l_res;
if(!a_group)
return NULL;
char * l_table_name = dap_db_driver_sqlite_make_table_name(a_group);
char *l_str_query = sqlite3_mprintf("SELECT id,ts,key,value FROM '%s' ORDER BY id DESC LIMIT 1", l_table_name);
int l_ret = dap_db_driver_sqlite_query(s_db, l_str_query, &l_res, &l_error_message);
sqlite3_free(l_str_query);
DAP_DEL_Z(l_table_name);
if(l_ret != SQLITE_OK) {
log_it(L_ERROR, "read last l_ret=%d, %s\n", sqlite3_errcode(s_db), sqlite3_errmsg(s_db));
dap_db_driver_sqlite_free(l_error_message);
return NULL;
}
SQLITE_ROW_VALUE *l_row = NULL; l_ret = dap_db_driver_sqlite_fetch_array(l_res, &l_row);
if(l_ret != SQLITE_ROW && l_ret != SQLITE_DONE)
{
log_it(L_ERROR, "read l_ret=%d, %s\n", sqlite3_errcode(s_db), sqlite3_errmsg(s_db));
}
if(l_ret == SQLITE_ROW && l_row) {
l_obj = DAP_NEW_Z(dap_store_obj_t);
fill_one_item(a_group, l_obj, l_row);
}
dap_db_driver_sqlite_row_free(l_row);
dap_db_driver_sqlite_query_free(l_res);
return l_obj;
}
/**
* Read several items with conditoin
*
* a_group - group name
* a_id - read from this id
* a_count_out[in], how many items to read, 0 - no limits
* a_count_out[out], how many items was read
*/
dap_store_obj_t* dap_db_driver_sqlite_read_cond_store_obj(const char *a_group, uint64_t a_id, size_t *a_count_out)
{
dap_store_obj_t *l_obj = NULL;
char *l_error_message = NULL;
sqlite3_stmt *l_res;
if(!a_group)
return NULL;
char * l_table_name = dap_db_driver_sqlite_make_table_name(a_group);
// no limit
int l_count_out = 0;
if(a_count_out)
l_count_out = (int)*a_count_out;
char *l_str_query;
if(l_count_out)
l_str_query = sqlite3_mprintf("SELECT id,ts,key,value FROM '%s' WHERE id>'%lld' ORDER BY id ASC LIMIT %d",
l_table_name, a_id, l_count_out);
else
l_str_query = sqlite3_mprintf("SELECT id,ts,key,value FROM '%s' WHERE id>'%lld' ORDER BY id ASC",
l_table_name, a_id);
int l_ret = dap_db_driver_sqlite_query(s_db, l_str_query, &l_res, &l_error_message);
sqlite3_free(l_str_query);
DAP_DEL_Z(l_table_name);
if(l_ret != SQLITE_OK) {
log_it(L_ERROR, "read l_ret=%d, %s\n", sqlite3_errcode(s_db), sqlite3_errmsg(s_db));
dap_db_driver_sqlite_free(l_error_message);
return NULL;
}
//int b = qlite3_column_count(s_db);
SQLITE_ROW_VALUE *l_row = NULL;
l_count_out = 0;
int l_count_sized = 0;
do {
l_ret = dap_db_driver_sqlite_fetch_array(l_res, &l_row);
if(l_ret != SQLITE_ROW && l_ret != SQLITE_DONE)
{
log_it(L_ERROR, "read l_ret=%d, %s\n", sqlite3_errcode(s_db), sqlite3_errmsg(s_db));
}
if(l_ret == SQLITE_ROW && l_row) {
// realloc memory
if(l_count_out >= l_count_sized) {
l_count_sized += 10;
l_obj = DAP_REALLOC(l_obj, sizeof(dap_store_obj_t) * (uint64_t)l_count_sized);
memset(l_obj + l_count_out, 0, sizeof(dap_store_obj_t) * (uint64_t)(l_count_sized - l_count_out));
} // fill current item
dap_store_obj_t *l_obj_cur = l_obj + l_count_out;
fill_one_item(a_group, l_obj_cur, l_row);
l_count_out++;
}
dap_db_driver_sqlite_row_free(l_row);
} while(l_row);
dap_db_driver_sqlite_query_free(l_res);
if(a_count_out)
*a_count_out = (size_t)l_count_out;
return l_obj;
}
/**
* Read several items
*
* a_group - group name
* a_key - key name, may by NULL, it means reading the whole group
* a_count_out[in], how many items to read, 0 - no limits
* a_count_out[out], how many items was read
*/
dap_store_obj_t* dap_db_driver_sqlite_read_store_obj(const char *a_group, const char *a_key, size_t *a_count_out)
{
dap_store_obj_t *l_obj = NULL;
char *l_error_message = NULL;
sqlite3_stmt *l_res;
if(!a_group)
return NULL;
char * l_table_name = dap_db_driver_sqlite_make_table_name(a_group);
// no limit
uint64_t l_count_out = 0;
if(a_count_out)
l_count_out = *a_count_out;
char *l_str_query;
if(a_key) {
if(l_count_out)
l_str_query = sqlite3_mprintf("SELECT id,ts,key,value FROM '%s' WHERE key='%s' ORDER BY id ASC LIMIT %d",
l_table_name, a_key, l_count_out);
else
l_str_query = sqlite3_mprintf("SELECT id,ts,key,value FROM '%s' WHERE key='%s' ORDER BY id ASC",
l_table_name, a_key);
}
else {
if(l_count_out)
l_str_query = sqlite3_mprintf("SELECT id,ts,key,value FROM '%s' ORDER BY id ASC LIMIT %d",
l_table_name, l_count_out);
else
l_str_query = sqlite3_mprintf("SELECT id,ts,key,value FROM '%s' ORDER BY id ASC", l_table_name);
}
int l_ret = dap_db_driver_sqlite_query(s_db, l_str_query, &l_res, &l_error_message);
sqlite3_free(l_str_query);
DAP_DEL_Z(l_table_name);
if(l_ret != SQLITE_OK) {
log_it(L_ERROR, "read l_ret=%d, %s\n", sqlite3_errcode(s_db), sqlite3_errmsg(s_db));
dap_db_driver_sqlite_free(l_error_message);
return NULL;
}
//int b = qlite3_column_count(s_db);
SQLITE_ROW_VALUE *l_row = NULL;
l_count_out = 0;
uint64_t l_count_sized = 0;
do {
l_ret = dap_db_driver_sqlite_fetch_array(l_res, &l_row);
if(l_ret != SQLITE_ROW && l_ret != SQLITE_DONE)
{
log_it(L_ERROR, "read l_ret=%d, %s\n", sqlite3_errcode(s_db), sqlite3_errmsg(s_db));
} if(l_ret == SQLITE_ROW && l_row) {
// realloc memory
if(l_count_out >= l_count_sized) {
l_count_sized += 10;
l_obj = DAP_REALLOC(l_obj, sizeof(dap_store_obj_t) * l_count_sized);
memset(l_obj + l_count_out, 0, sizeof(dap_store_obj_t) * (l_count_sized - l_count_out));
}
// fill currrent item
dap_store_obj_t *l_obj_cur = l_obj + l_count_out;
fill_one_item(a_group, l_obj_cur, l_row);
l_count_out++;
}
dap_db_driver_sqlite_row_free(l_row);
} while(l_row);
dap_db_driver_sqlite_query_free(l_res);
if(a_count_out)
*a_count_out = l_count_out;
return l_obj;
}