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/*
sqlite3.cpp
Copyright (C) 2019 Richard Knight
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This program 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <plugin.h>
#include <iostream>
#include <sqlite3.h>
#include "connection.h"
#include "sqlite.h"
void SqliteConnection::Init(csnd::Csound* csound, LoginData* login) {
int result = sqlite3_open(login->dbName, &conn);
std::cout << "Y";
if (result) {
throw std::runtime_error("connection not established");
}
}
void SqliteConnection::Close(csnd::Csound* csound) {
sqlite3_close(conn);
}
void SqliteConnection::Exec(char* sql) {
sqlite3_stmt* stmt = Query(sql);
int rc = sqlite3_step(stmt);
rc = sqlite3_finalize(stmt);
}
sqlite3_stmt* SqliteConnection::Query(char* sql) {
sqlite3_stmt* stmt = NULL;
int rc = sqlite3_prepare_v2(conn, sql, -1, &stmt, NULL);
if (rc != SQLITE_OK) {
throw std::runtime_error(sqlite3_errmsg(conn));
}
return stmt;
}
MYFLT SqliteConnection::Scalar(char* sql, int row, int col) {
sqlite3_stmt *stmt = Query(sql);
int colCount = sqlite3_column_count(stmt);
int rc = sqlite3_step(stmt);
int rowIndex = 0;
while (rc != SQLITE_DONE && rc != SQLITE_OK) {
if (rowIndex == row) {
if (col > colCount -1) {
rc = sqlite3_finalize(stmt);
throw std::runtime_error("column number out of range");
}
MYFLT result = (MYFLT) sqlite3_column_double(stmt, col);
rc = sqlite3_finalize(stmt);
return result;
}
rc = sqlite3_step(stmt);
rowIndex++;
}
rc = sqlite3_finalize(stmt);
throw std::runtime_error("no result");
}
char* SqliteConnection::ScalarString(char* sql, int row, int col) {
sqlite3_stmt *stmt = Query(sql);
int colCount = sqlite3_column_count(stmt);
int rc = sqlite3_step(stmt);
int rowIndex = 0;
while (rc != SQLITE_DONE && rc != SQLITE_OK) {
if (rowIndex == row) {
if (col > colCount -1) {
rc = sqlite3_finalize(stmt);
throw std::runtime_error("column number out of range");
}
char* result = sqlite3_column_text(stmt, col);
rc = sqlite3_finalize(stmt);
return result;
}
rc = sqlite3_step(stmt);
rowIndex++;
}
rc = sqlite3_finalize(stmt);
throw std::runtime_error("no result");
}
int SqliteConnection::RowCount(sqlite3_stmt* stmt) {
int rowCount = 0;
int rc = sqlite3_step(stmt);
while (rc != SQLITE_DONE && rc != SQLITE_OK) {
rc = sqlite3_step(stmt);
rowCount ++;
}
rc = sqlite3_reset(stmt);
return rowCount;
}
void SqliteConnection::ToArray(sqlite3_stmt* stmt, csnd::Csound* csound, ARRAYDAT* array, bool asString) {
int colNum = sqlite3_column_count(stmt);
int rowNum = RowCount(stmt);
int totalResults = colNum * rowNum;
array->sizes = csound->calloc(sizeof(int32_t) * 2);
array->sizes[0] = rowNum;
array->sizes[1] = colNum;
array->dimensions = 2;
CS_VARIABLE *var = array->arrayType->createVariable(csound, NULL);
array->arrayMemberSize = var->memBlockSize;
array->data = csound->calloc(var->memBlockSize * totalResults);
STRINGDAT* strings;
if (asString) {
strings = (STRINGDAT*) array->data;
}
int colIndex;
int rowIndex;
int index = 0;
int rc = sqlite3_step(stmt);
while (rc != SQLITE_DONE && rc != SQLITE_OK) {
colIndex = 0;
while (colIndex < colNum) {
if (asString) {
char* item = sqlite3_column_text(stmt, colIndex);
strings[index].size = strlen(item) + 1;
strings[index].data = csound->strdup(item);
} else {
array->data[index] = (MYFLT) sqlite3_column_double(stmt, colIndex);
}
colIndex ++;
index++;
}
rc = sqlite3_step(stmt);
rowIndex++;
}
rc = sqlite3_finalize(stmt);
}
void SqliteConnection::ArrayQueryString(char* sql, csnd::Csound* csound, ARRAYDAT* array) {
ToArray(Query(sql), csound, array, true);
}
void SqliteConnection::ArrayQuery(char* sql, csnd::Csound* csound, ARRAYDAT* array) {
ToArray(Query(sql), csound, array, false);
}
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