SQLiteUnityKit/SqliteDatabase.cs at master · iscoder/SQLiteUnityKit · GitHub

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using System;

using System.Runtime.InteropServices;

using System.Collections;

using UnityEngine;

* please don't use this code for sell a asset

* user for free

* developed by Poya @ http://gamesforsoul.com/

* BLOB support by Jonathan Derrough @ http://jderrough.blogspot.com/

* Modify and structure by Santiago Bustamante @ busta117@gmail.com

* Android compatibility by Thomas Olsen @ olsen.thomas@gmail.com

* */

public class SqliteException : Exception

{

public SqliteException (string message) : base(message)

{

}

public class SqliteDatabase

{

private bool CanExQuery = true;

const int SQLITE_OK = 0;

const int SQLITE_ROW = 100;

const int SQLITE_DONE = 101;

const int SQLITE_INTEGER = 1;

const int SQLITE_FLOAT = 2;

const int SQLITE_TEXT = 3;

const int SQLITE_BLOB = 4;

const int SQLITE_NULL = 5;

[DllImport("sqlite3", EntryPoint = "sqlite3_open")]

private static extern int sqlite3_open (string filename, out IntPtr db);

[DllImport("sqlite3", EntryPoint = "sqlite3_close")]

private static extern int sqlite3_close (IntPtr db);

[DllImport("sqlite3", EntryPoint = "sqlite3_prepare_v2")]

private static extern int sqlite3_prepare_v2 (IntPtr db, string zSql, int nByte, out IntPtr ppStmpt, IntPtr pzTail);

[DllImport("sqlite3", EntryPoint = "sqlite3_step")]

private static extern int sqlite3_step (IntPtr stmHandle);

[DllImport("sqlite3", EntryPoint = "sqlite3_finalize")]

private static extern int sqlite3_finalize (IntPtr stmHandle);

[DllImport("sqlite3", EntryPoint = "sqlite3_errmsg")]

private static extern IntPtr sqlite3_errmsg (IntPtr db);

[DllImport("sqlite3", EntryPoint = "sqlite3_column_count")]

private static extern int sqlite3_column_count (IntPtr stmHandle);

[DllImport("sqlite3", EntryPoint = "sqlite3_column_name")]

private static extern IntPtr sqlite3_column_name (IntPtr stmHandle, int iCol);

[DllImport("sqlite3", EntryPoint = "sqlite3_column_type")]

private static extern int sqlite3_column_type (IntPtr stmHandle, int iCol);

[DllImport("sqlite3", EntryPoint = "sqlite3_column_int")]

private static extern int sqlite3_column_int (IntPtr stmHandle, int iCol);

[DllImport("sqlite3", EntryPoint = "sqlite3_column_text")]

private static extern IntPtr sqlite3_column_text (IntPtr stmHandle, int iCol);

[DllImport("sqlite3", EntryPoint = "sqlite3_column_double")]

private static extern double sqlite3_column_double (IntPtr stmHandle, int iCol);

[DllImport("sqlite3", EntryPoint = "sqlite3_column_blob")]

private static extern IntPtr sqlite3_column_blob (IntPtr stmHandle, int iCol);

[DllImport("sqlite3", EntryPoint = "sqlite3_column_bytes")]

private static extern int sqlite3_column_bytes (IntPtr stmHandle, int iCol);

private IntPtr _connection;

private bool IsConnectionOpen { get; set; }

private string pathDB;

#region Public Methods

/// <summary>

/// Initializes a new instance of the <see cref="SqliteDatabase"/> class.

/// </summary>

/// <param name='dbName'>

/// Data Base name. (the file needs exist in the streamingAssets folder)

/// </param>

public SqliteDatabase (string dbName)

{

pathDB = System.IO.Path.Combine (Application.persistentDataPath, dbName);

//original path

string sourcePath = System.IO.Path.Combine (Application.streamingAssetsPath, dbName);

//if DB does not exist in persistent data folder (folder "Documents" on iOS) or source DB is newer then copy it

if (!System.IO.File.Exists (pathDB) || (System.IO.File.GetLastWriteTimeUtc(sourcePath) > System.IO.File.GetLastWriteTimeUtc(pathDB))) {

if (sourcePath.Contains ("://")) {

// Android

WWW www = new WWW (sourcePath);

// Wait for download to complete - not pretty at all but easy hack for now

// and it would not take long since the data is on the local device.

while (!www.isDone) {;}

if (String.IsNullOrEmpty(www.error)) {

System.IO.File.WriteAllBytes(pathDB, www.bytes);

} else {

CanExQuery = false;

}

} else {

// Mac, Windows, Iphone

//validate the existens of the DB in the original folder (folder "streamingAssets")

if (System.IO.File.Exists (sourcePath)) {

//copy file - alle systems except Android

System.IO.File.Copy (sourcePath, pathDB, true);

} else {

CanExQuery = false;

Debug.Log ("ERROR: the file DB named " + dbName + " doesn't exist in the StreamingAssets Folder, please copy it there.");

}

private void Open ()

{

this.Open (pathDB);

}

private void Open (string path)

{

if (IsConnectionOpen) {

throw new SqliteException ("There is already an open connection");

}

if (sqlite3_open (path, out _connection) != SQLITE_OK) {

throw new SqliteException ("Could not open database file: " + path);

}

IsConnectionOpen = true;

}

private void Close ()

{

if (IsConnectionOpen) {

sqlite3_close (_connection);

}

IsConnectionOpen = false;

}

/// <summary>

/// Executes a Update, Delete, etc query.

/// </summary>

/// <param name='query'>

/// Query.

/// </param>

/// <exception cref='SqliteException'>

/// Is thrown when the sqlite exception.

/// </exception>

public void ExecuteNonQuery (string query)

{

if (!CanExQuery) {

Debug.Log ("ERROR: Can't execute the query, verify DB origin file");

return;

}

this.Open ();

if (!IsConnectionOpen) {

throw new SqliteException ("SQLite database is not open.");

}

IntPtr stmHandle = Prepare (query);

if (sqlite3_step (stmHandle) != SQLITE_DONE) {

throw new SqliteException ("Could not execute SQL statement.");

}

Finalize (stmHandle);

this.Close ();

}

/// <summary>

/// Executes a query that requires a response (SELECT, etc).

/// </summary>

/// <returns>

/// Dictionary with the response data

/// </returns>

/// <param name='query'>

/// Query.

/// </param>

/// <exception cref='SqliteException'>

/// Is thrown when the sqlite exception.

/// </exception>

public DataTable ExecuteQuery (string query)

{

if (!CanExQuery) {

Debug.Log ("ERROR: Can't execute the query, verify DB origin file");

return null;

}

this.Open ();

if (!IsConnectionOpen) {

throw new SqliteException ("SQLite database is not open.");

}

IntPtr stmHandle = Prepare (query);

int columnCount = sqlite3_column_count (stmHandle);

var dataTable = new DataTable ();

for (int i = 0; i < columnCount; i++) {

string columnName = Marshal.PtrToStringAnsi (sqlite3_column_name (stmHandle, i));

dataTable.Columns.Add (columnName);

}

//populate datatable

while (sqlite3_step(stmHandle) == SQLITE_ROW) {

object[] row = new object[columnCount];

for (int i = 0; i < columnCount; i++) {

switch (sqlite3_column_type (stmHandle, i)) {

case SQLITE_INTEGER:

row [i] = sqlite3_column_int (stmHandle, i);

break;

case SQLITE_TEXT:

IntPtr text = sqlite3_column_text (stmHandle, i);

row [i] = Marshal.PtrToStringAnsi (text);

break;

case SQLITE_FLOAT:

row [i] = sqlite3_column_double (stmHandle, i);

break;

case SQLITE_BLOB:

IntPtr blob = sqlite3_column_blob (stmHandle, i);

int size = sqlite3_column_bytes (stmHandle, i);

byte[] data = new byte[size];

Marshal.Copy (blob, data, 0, size);

row [i] = data;

break;

case SQLITE_NULL:

row [i] = null;

break;

}

dataTable.AddRow (row);

}

Finalize (stmHandle);

this.Close ();

return dataTable;

}

public void ExecuteScript (string script)

{

string[] statements = script.Split (';');

foreach (string statement in statements) {

if (!string.IsNullOrEmpty (statement.Trim ())) {

ExecuteNonQuery (statement);

}

#endregion

#region Private Methods

private IntPtr Prepare (string query)

{

IntPtr stmHandle;

if (sqlite3_prepare_v2 (_connection, query, query.Length, out stmHandle, IntPtr.Zero) != SQLITE_OK) {

IntPtr errorMsg = sqlite3_errmsg (_connection);

throw new SqliteException (Marshal.PtrToStringAnsi (errorMsg));

}

return stmHandle;

}

private void Finalize (IntPtr stmHandle)

{

if (sqlite3_finalize (stmHandle) != SQLITE_OK) {

throw new SqliteException ("Could not finalize SQL statement.");

}

#endregion

}

SQLiteUnityKit/SqliteDatabase.cs at master · iscoder/SQLiteUnityKit · GitHub

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