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/********************************************************
* ADO.NET 2.0 Data Provider for SQLite Version 3.X
* Written by Robert Simpson (robert@blackcastlesoft.com)
*
* Released to the public domain, use at your own risk!
********************************************************/
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;
namespace System.Data.SQLite
{
/// <summary>
/// This class implements SQLiteBase completely, and is the guts of the code that interop's SQLite with .NET
/// </summary>
internal class SQLite3 : SQLiteBase
{
/// <summary>
/// The opaque pointer returned to us by the sqlite provider
/// </summary>
protected SQLiteConnectionHandle _sql;
protected string _fileName;
protected bool _usePool;
protected int _poolVersion;
#if !PLATFORM_COMPACTFRAMEWORK
private bool _buildingSchema;
#endif
/// <summary>
/// The user-defined functions registered on this connection
/// </summary>
protected SQLiteFunction[] _functionsArray;
internal SQLite3(SQLiteDateFormats fmt)
: base(fmt)
{
}
protected override void Dispose(bool bDisposing)
{
if (bDisposing)
Close();
}
// It isn't necessary to cleanup any functions we've registered. If the connection
// goes to the pool and is resurrected later, re-registered functions will overwrite the
// previous functions. The SQLiteFunctionCookieHandle will take care of freeing unmanaged
// resources belonging to the previously-registered functions.
internal override void Close()
{
if (_sql != null)
{
if (_usePool)
{
ResetConnection(_sql);
SQLiteConnectionPool.Add(_fileName, _sql, _poolVersion);
}
else
_sql.Dispose();
}
_sql = null;
}
internal override void Cancel()
{
UnsafeNativeMethods.sqlite3_interrupt(_sql);
}
internal override string Version
{
get { return SQLiteVersion; }
}
internal static string SQLiteVersion
{
get { return UTF8ToString(UnsafeNativeMethods.sqlite3_libversion(), -1); }
}
internal override bool AutoCommit
{
get { return IsAutocommit(_sql); }
}
internal override int Changes
{
get { return UnsafeNativeMethods.sqlite3_changes(_sql); }
}
internal override void Open(string strFilename, SQLiteOpenFlagsEnum flags, int maxPoolSize, bool usePool)
{
if (_sql != null) return;
_usePool = usePool;
if (usePool)
{
_fileName = strFilename;
_sql = SQLiteConnectionPool.Remove(strFilename, maxPoolSize, out _poolVersion);
}
if (_sql == null)
{
IntPtr db;
#if !SQLITE_STANDARD
int n = UnsafeNativeMethods.sqlite3_open_interop(ToUTF8(strFilename), (int) flags, out db);
#else
int n = UnsafeNativeMethods.sqlite3_open_v2(ToUTF8(strFilename), out db, (int)flags, IntPtr.Zero);
#endif
if (n > 0) throw new SQLiteException(n, null);
_sql = db;
}
// Bind functions to this connection. If any previous functions of the same name
// were already bound, then the new bindings replace the old.
_functionsArray = SQLiteFunction.BindFunctions(this);
SetTimeout(0);
}
internal override void ClearPool()
{
SQLiteConnectionPool.ClearPool(_fileName);
}
internal override void SetTimeout(int nTimeoutMS)
{
int n = UnsafeNativeMethods.sqlite3_busy_timeout(_sql, nTimeoutMS);
if (n > 0) throw new SQLiteException(n, SQLiteLastError());
}
internal override bool Step(SQLiteStatement stmt)
{
int n;
Random rnd = null;
var starttick = (uint) Environment.TickCount;
var timeout = (uint) (stmt._command._commandTimeout*1000);
while (true)
{
n = UnsafeNativeMethods.sqlite3_step(stmt._sqlite_stmt);
if (n == 100) return true;
if (n == 101) return false;
if (n > 0)
{
int r;
// An error occurred, attempt to reset the statement. If the reset worked because the
// schema has changed, re-try the step again. If it errored our because the database
// is locked, then keep retrying until the command timeout occurs.
r = Reset(stmt);
if (r == 0)
throw new SQLiteException(n, SQLiteLastError());
else if ((r == 6 || r == 5) && stmt._command != null) // SQLITE_LOCKED || SQLITE_BUSY
{
// Keep trying
if (rnd == null) // First time we've encountered the lock
rnd = new Random();
// If we've exceeded the command's timeout, give up and throw an error
if ((uint) Environment.TickCount - starttick > timeout)
{
throw new SQLiteException(r, SQLiteLastError());
}
else
{
// Otherwise sleep for a random amount of time up to 150ms
Thread.Sleep(rnd.Next(1, 150));
}
}
}
}
}
internal override int Reset(SQLiteStatement stmt)
{
int n;
#if !SQLITE_STANDARD
n = UnsafeNativeMethods.sqlite3_reset_interop(stmt._sqlite_stmt);
#else
n = UnsafeNativeMethods.sqlite3_reset(stmt._sqlite_stmt);
#endif
// If the schema changed, try and re-prepare it
if (n == 17) // SQLITE_SCHEMA
{
// Recreate a dummy statement
string str;
using (
SQLiteStatement tmp = Prepare(null, stmt._sqlStatement, null,
(uint) (stmt._command._commandTimeout*1000), out str))
{
// Finalize the existing statement
stmt._sqlite_stmt.Dispose();
// Reassign a new statement pointer to the old statement and clear the temporary one
stmt._sqlite_stmt = tmp._sqlite_stmt;
tmp._sqlite_stmt = null;
// Reapply parameters
stmt.BindParameters();
}
return -1; // Reset was OK, with schema change
}
else if (n == 6 || n == 5) // SQLITE_LOCKED || SQLITE_BUSY
return n;
if (n > 0)
throw new SQLiteException(n, SQLiteLastError());
return 0; // We reset OK, no schema changes
}
internal override string SQLiteLastError()
{
return SQLiteLastError(_sql);
}
internal override SQLiteStatement Prepare(SQLiteConnection cnn, string strSql, SQLiteStatement previous,
uint timeoutMS, out string strRemain)
{
IntPtr stmt = IntPtr.Zero;
IntPtr ptr = IntPtr.Zero;
int len = 0;
int n = 17;
int retries = 0;
byte[] b = ToUTF8(strSql);
string typedefs = null;
SQLiteStatement cmd = null;
Random rnd = null;
var starttick = (uint) Environment.TickCount;
GCHandle handle = GCHandle.Alloc(b, GCHandleType.Pinned);
IntPtr psql = handle.AddrOfPinnedObject();
try
{
while ((n == 17 || n == 6 || n == 5) && retries < 3)
{
#if !SQLITE_STANDARD
n = UnsafeNativeMethods.sqlite3_prepare_interop(_sql, psql, b.Length - 1, out stmt, out ptr, out len);
#else
n = UnsafeNativeMethods.sqlite3_prepare(_sql, psql, b.Length - 1, out stmt, out ptr);
len = -1;
#endif
if (n == 17)
retries++;
else if (n == 1)
{
if (
String.Compare(SQLiteLastError(), "near \"TYPES\": syntax error",
StringComparison.OrdinalIgnoreCase) == 0)
{
int pos = strSql.IndexOf(';');
if (pos == -1) pos = strSql.Length - 1;
typedefs = strSql.Substring(0, pos + 1);
strSql = strSql.Substring(pos + 1);
strRemain = "";
while (cmd == null && strSql.Length > 0)
{
cmd = Prepare(cnn, strSql, previous, timeoutMS, out strRemain);
strSql = strRemain;
}
if (cmd != null)
cmd.SetTypes(typedefs);
return cmd;
}
#if !PLATFORM_COMPACTFRAMEWORK
else if (_buildingSchema == false &&
String.Compare(SQLiteLastError(), 0, "no such table: TEMP.SCHEMA", 0, 26,
StringComparison.OrdinalIgnoreCase) == 0)
{
strRemain = "";
_buildingSchema = true;
try
{
var ext =
((IServiceProvider) SQLiteFactory.Instance).GetService(
typeof (ISQLiteSchemaExtensions)) as ISQLiteSchemaExtensions;
if (ext != null)
ext.BuildTempSchema(cnn);
while (cmd == null && strSql.Length > 0)
{
cmd = Prepare(cnn, strSql, previous, timeoutMS, out strRemain);
strSql = strRemain;
}
return cmd;
}
finally
{
_buildingSchema = false;
}
}
#endif
}
else if (n == 6 || n == 5) // Locked -- delay a small amount before retrying
{
// Keep trying
if (rnd == null) // First time we've encountered the lock
rnd = new Random();
// If we've exceeded the command's timeout, give up and throw an error
if ((uint) Environment.TickCount - starttick > timeoutMS)
{
throw new SQLiteException(n, SQLiteLastError());
}
else
{
// Otherwise sleep for a random amount of time up to 150ms
Thread.Sleep(rnd.Next(1, 150));
}
}
}
if (n > 0) throw new SQLiteException(n, SQLiteLastError());
strRemain = UTF8ToString(ptr, len);
if (stmt != IntPtr.Zero)
cmd = new SQLiteStatement(this, stmt, strSql.Substring(0, strSql.Length - strRemain.Length),
previous);
return cmd;
}
finally
{
handle.Free();
}
}
internal override void Bind_Double(SQLiteStatement stmt, int index, double value)
{
#if !PLATFORM_COMPACTFRAMEWORK
int n = UnsafeNativeMethods.sqlite3_bind_double(stmt._sqlite_stmt, index, value);
#else
int n = UnsafeNativeMethods.sqlite3_bind_double_interop(stmt._sqlite_stmt, index, ref value);
#endif
if (n > 0) throw new SQLiteException(n, SQLiteLastError());
}
internal override void Bind_Int32(SQLiteStatement stmt, int index, int value)
{
int n = UnsafeNativeMethods.sqlite3_bind_int(stmt._sqlite_stmt, index, value);
if (n > 0) throw new SQLiteException(n, SQLiteLastError());
}
internal override void Bind_Int64(SQLiteStatement stmt, int index, long value)
{
#if !PLATFORM_COMPACTFRAMEWORK
int n = UnsafeNativeMethods.sqlite3_bind_int64(stmt._sqlite_stmt, index, value);
#else
int n = UnsafeNativeMethods.sqlite3_bind_int64_interop(stmt._sqlite_stmt, index, ref value);
#endif
if (n > 0) throw new SQLiteException(n, SQLiteLastError());
}
internal override void Bind_Text(SQLiteStatement stmt, int index, string value)
{
byte[] b = ToUTF8(value);
int n = UnsafeNativeMethods.sqlite3_bind_text(stmt._sqlite_stmt, index, b, b.Length - 1, (IntPtr) (-1));
if (n > 0) throw new SQLiteException(n, SQLiteLastError());
}
internal override void Bind_DateTime(SQLiteStatement stmt, int index, DateTime dt)
{
byte[] b = ToUTF8(dt);
int n = UnsafeNativeMethods.sqlite3_bind_text(stmt._sqlite_stmt, index, b, b.Length - 1, (IntPtr) (-1));
if (n > 0) throw new SQLiteException(n, SQLiteLastError());
}
internal override void Bind_Blob(SQLiteStatement stmt, int index, byte[] blobData)
{
int n = UnsafeNativeMethods.sqlite3_bind_blob(stmt._sqlite_stmt, index, blobData, blobData.Length,
(IntPtr) (-1));
if (n > 0) throw new SQLiteException(n, SQLiteLastError());
}
internal override void Bind_Null(SQLiteStatement stmt, int index)
{
int n = UnsafeNativeMethods.sqlite3_bind_null(stmt._sqlite_stmt, index);
if (n > 0) throw new SQLiteException(n, SQLiteLastError());
}
internal override int Bind_ParamCount(SQLiteStatement stmt)
{
return UnsafeNativeMethods.sqlite3_bind_parameter_count(stmt._sqlite_stmt);
}
internal override string Bind_ParamName(SQLiteStatement stmt, int index)
{
#if !SQLITE_STANDARD
int len;
return
UTF8ToString(
UnsafeNativeMethods.sqlite3_bind_parameter_name_interop(stmt._sqlite_stmt, index, out len), len);
#else
return UTF8ToString(UnsafeNativeMethods.sqlite3_bind_parameter_name(stmt._sqlite_stmt, index), -1);
#endif
}
internal override int Bind_ParamIndex(SQLiteStatement stmt, string paramName)
{
return UnsafeNativeMethods.sqlite3_bind_parameter_index(stmt._sqlite_stmt, ToUTF8(paramName));
}
internal override int ColumnCount(SQLiteStatement stmt)
{
return UnsafeNativeMethods.sqlite3_column_count(stmt._sqlite_stmt);
}
internal override string ColumnName(SQLiteStatement stmt, int index)
{
#if !SQLITE_STANDARD
int len;
return UTF8ToString(UnsafeNativeMethods.sqlite3_column_name_interop(stmt._sqlite_stmt, index, out len), len);
#else
return UTF8ToString(UnsafeNativeMethods.sqlite3_column_name(stmt._sqlite_stmt, index), -1);
#endif
}
internal override TypeAffinity ColumnAffinity(SQLiteStatement stmt, int index)
{
return UnsafeNativeMethods.sqlite3_column_type(stmt._sqlite_stmt, index);
}
internal override string ColumnType(SQLiteStatement stmt, int index, out TypeAffinity nAffinity)
{
int len;
#if !SQLITE_STANDARD
IntPtr p = UnsafeNativeMethods.sqlite3_column_decltype_interop(stmt._sqlite_stmt, index, out len);
#else
len = -1;
IntPtr p = UnsafeNativeMethods.sqlite3_column_decltype(stmt._sqlite_stmt, index);
#endif
nAffinity = ColumnAffinity(stmt, index);
if (p != IntPtr.Zero) return UTF8ToString(p, len);
else
{
string[] ar = stmt.TypeDefinitions;
if (ar != null)
{
if (index < ar.Length && ar[index] != null)
return ar[index];
}
return String.Empty;
//switch (nAffinity)
//{
// case TypeAffinity.Int64:
// return "BIGINT";
// case TypeAffinity.Double:
// return "DOUBLE";
// case TypeAffinity.Blob:
// return "BLOB";
// default:
// return "TEXT";
//}
}
}
internal override int ColumnIndex(SQLiteStatement stmt, string columnName)
{
int x = ColumnCount(stmt);
for (int n = 0; n < x; n++)
{
if (String.Compare(columnName, ColumnName(stmt, n), StringComparison.OrdinalIgnoreCase) == 0)
return n;
}
return -1;
}
internal override string ColumnOriginalName(SQLiteStatement stmt, int index)
{
#if !SQLITE_STANDARD
int len;
return
UTF8ToString(UnsafeNativeMethods.sqlite3_column_origin_name_interop(stmt._sqlite_stmt, index, out len),
len);
#else
return UTF8ToString(UnsafeNativeMethods.sqlite3_column_origin_name(stmt._sqlite_stmt, index), -1);
#endif
}
internal override string ColumnDatabaseName(SQLiteStatement stmt, int index)
{
#if !SQLITE_STANDARD
int len;
return
UTF8ToString(
UnsafeNativeMethods.sqlite3_column_database_name_interop(stmt._sqlite_stmt, index, out len), len);
#else
return UTF8ToString(UnsafeNativeMethods.sqlite3_column_database_name(stmt._sqlite_stmt, index), -1);
#endif
}
internal override string ColumnTableName(SQLiteStatement stmt, int index)
{
#if !SQLITE_STANDARD
int len;
return UTF8ToString(
UnsafeNativeMethods.sqlite3_column_table_name_interop(stmt._sqlite_stmt, index, out len), len);
#else
return UTF8ToString(UnsafeNativeMethods.sqlite3_column_table_name(stmt._sqlite_stmt, index), -1);
#endif
}
internal override void ColumnMetaData(string dataBase, string table, string column, out string dataType,
out string collateSequence, out bool notNull, out bool primaryKey,
out bool autoIncrement)
{
IntPtr dataTypePtr;
IntPtr collSeqPtr;
int nnotNull;
int nprimaryKey;
int nautoInc;
int n;
int dtLen;
int csLen;
#if !SQLITE_STANDARD
n = UnsafeNativeMethods.sqlite3_table_column_metadata_interop(_sql, ToUTF8(dataBase), ToUTF8(table),
ToUTF8(column), out dataTypePtr,
out collSeqPtr, out nnotNull, out nprimaryKey,
out nautoInc, out dtLen, out csLen);
#else
dtLen = -1;
csLen = -1;
n = UnsafeNativeMethods.sqlite3_table_column_metadata(_sql, ToUTF8(dataBase), ToUTF8(table), ToUTF8(column), out dataTypePtr, out collSeqPtr, out nnotNull, out nprimaryKey, out nautoInc);
#endif
if (n > 0) throw new SQLiteException(n, SQLiteLastError());
dataType = UTF8ToString(dataTypePtr, dtLen);
collateSequence = UTF8ToString(collSeqPtr, csLen);
notNull = (nnotNull == 1);
primaryKey = (nprimaryKey == 1);
autoIncrement = (nautoInc == 1);
}
internal override double GetDouble(SQLiteStatement stmt, int index)
{
double value;
#if !PLATFORM_COMPACTFRAMEWORK
value = UnsafeNativeMethods.sqlite3_column_double(stmt._sqlite_stmt, index);
#else
UnsafeNativeMethods.sqlite3_column_double_interop(stmt._sqlite_stmt, index, out value);
#endif
return value;
}
internal override int GetInt32(SQLiteStatement stmt, int index)
{
return UnsafeNativeMethods.sqlite3_column_int(stmt._sqlite_stmt, index);
}
internal override long GetInt64(SQLiteStatement stmt, int index)
{
long value;
#if !PLATFORM_COMPACTFRAMEWORK
value = UnsafeNativeMethods.sqlite3_column_int64(stmt._sqlite_stmt, index);
#else
UnsafeNativeMethods.sqlite3_column_int64_interop(stmt._sqlite_stmt, index, out value);
#endif
return value;
}
internal override string GetText(SQLiteStatement stmt, int index)
{
#if !SQLITE_STANDARD
int len;
return UTF8ToString(UnsafeNativeMethods.sqlite3_column_text_interop(stmt._sqlite_stmt, index, out len), len);
#else
return UTF8ToString(UnsafeNativeMethods.sqlite3_column_text(stmt._sqlite_stmt, index), -1);
#endif
}
internal override DateTime GetDateTime(SQLiteStatement stmt, int index)
{
#if !SQLITE_STANDARD
int len;
return ToDateTime(UnsafeNativeMethods.sqlite3_column_text_interop(stmt._sqlite_stmt, index, out len), len);
#else
return ToDateTime(UnsafeNativeMethods.sqlite3_column_text(stmt._sqlite_stmt, index), -1);
#endif
}
internal override long GetBytes(SQLiteStatement stmt, int index, int nDataOffset, byte[] bDest, int nStart,
int nLength)
{
IntPtr ptr;
int nlen;
int nCopied = nLength;
nlen = UnsafeNativeMethods.sqlite3_column_bytes(stmt._sqlite_stmt, index);
ptr = UnsafeNativeMethods.sqlite3_column_blob(stmt._sqlite_stmt, index);
if (bDest == null) return nlen;
if (nCopied + nStart > bDest.Length) nCopied = bDest.Length - nStart;
if (nCopied + nDataOffset > nlen) nCopied = nlen - nDataOffset;
if (nCopied > 0)
Marshal.Copy((IntPtr) (ptr.ToInt64() + nDataOffset), bDest, nStart, nCopied);
else nCopied = 0;
return nCopied;
}
internal override long GetChars(SQLiteStatement stmt, int index, int nDataOffset, char[] bDest, int nStart,
int nLength)
{
int nlen;
int nCopied = nLength;
string str = GetText(stmt, index);
nlen = str.Length;
if (bDest == null) return nlen;
if (nCopied + nStart > bDest.Length) nCopied = bDest.Length - nStart;
if (nCopied + nDataOffset > nlen) nCopied = nlen - nDataOffset;
if (nCopied > 0)
str.CopyTo(nDataOffset, bDest, nStart, nCopied);
else nCopied = 0;
return nCopied;
}
internal override bool IsNull(SQLiteStatement stmt, int index)
{
return (ColumnAffinity(stmt, index) == TypeAffinity.Null);
}
internal override int AggregateCount(IntPtr context)
{
return UnsafeNativeMethods.sqlite3_aggregate_count(context);
}
internal override void CreateFunction(string strFunction, int nArgs, bool needCollSeq, SQLiteCallback func,
SQLiteCallback funcstep, SQLiteFinalCallback funcfinal)
{
int n;
#if !SQLITE_STANDARD
n = UnsafeNativeMethods.sqlite3_create_function_interop(_sql, ToUTF8(strFunction), nArgs, 4, IntPtr.Zero,
func, funcstep, funcfinal, needCollSeq ? 1 : 0);
if (n == 0)
n = UnsafeNativeMethods.sqlite3_create_function_interop(_sql, ToUTF8(strFunction), nArgs, 1, IntPtr.Zero,
func, funcstep, funcfinal, needCollSeq ? 1 : 0);
#else
n = UnsafeNativeMethods.sqlite3_create_function(_sql, ToUTF8(strFunction), nArgs, 4, IntPtr.Zero, func, funcstep, funcfinal);
if (n == 0) n = UnsafeNativeMethods.sqlite3_create_function(_sql, ToUTF8(strFunction), nArgs, 1, IntPtr.Zero, func, funcstep, funcfinal);
#endif
if (n > 0) throw new SQLiteException(n, SQLiteLastError());
}
internal override void CreateCollation(string strCollation, SQLiteCollation func, SQLiteCollation func16)
{
int n = UnsafeNativeMethods.sqlite3_create_collation(_sql, ToUTF8(strCollation), 2, IntPtr.Zero, func16);
if (n == 0)
n = UnsafeNativeMethods.sqlite3_create_collation(_sql, ToUTF8(strCollation), 1, IntPtr.Zero, func);
if (n > 0) throw new SQLiteException(n, SQLiteLastError());
}
internal override int ContextCollateCompare(CollationEncodingEnum enc, IntPtr context, string s1, string s2)
{
#if !SQLITE_STANDARD
byte[] b1;
byte[] b2;
Encoding converter = null;
switch (enc)
{
case CollationEncodingEnum.UTF8:
converter = Encoding.UTF8;
break;
case CollationEncodingEnum.UTF16LE:
converter = Encoding.Unicode;
break;
case CollationEncodingEnum.UTF16BE:
converter = Encoding.BigEndianUnicode;
break;
}
b1 = converter.GetBytes(s1);
b2 = converter.GetBytes(s2);
return UnsafeNativeMethods.sqlite3_context_collcompare(context, b1, b1.Length, b2, b2.Length);
#else
throw new NotImplementedException();
#endif
}
internal override int ContextCollateCompare(CollationEncodingEnum enc, IntPtr context, char[] c1, char[] c2)
{
#if !SQLITE_STANDARD
byte[] b1;
byte[] b2;
Encoding converter = null;
switch (enc)
{
case CollationEncodingEnum.UTF8:
converter = Encoding.UTF8;
break;
case CollationEncodingEnum.UTF16LE:
converter = Encoding.Unicode;
break;
case CollationEncodingEnum.UTF16BE:
converter = Encoding.BigEndianUnicode;
break;
}
b1 = converter.GetBytes(c1);
b2 = converter.GetBytes(c2);
return UnsafeNativeMethods.sqlite3_context_collcompare(context, b1, b1.Length, b2, b2.Length);
#else
throw new NotImplementedException();
#endif
}
internal override CollationSequence GetCollationSequence(SQLiteFunction func, IntPtr context)
{
#if !SQLITE_STANDARD
var seq = new CollationSequence();
int len;
int type;
int enc;
IntPtr p = UnsafeNativeMethods.sqlite3_context_collseq(context, out type, out enc, out len);
if (p != null) seq.Name = UTF8ToString(p, len);
seq.Type = (CollationTypeEnum) type;
seq._func = func;
seq.Encoding = (CollationEncodingEnum) enc;
return seq;
#else
throw new NotImplementedException();
#endif
}
internal override long GetParamValueBytes(IntPtr p, int nDataOffset, byte[] bDest, int nStart, int nLength)
{
IntPtr ptr;
int nlen;
int nCopied = nLength;
nlen = UnsafeNativeMethods.sqlite3_value_bytes(p);
ptr = UnsafeNativeMethods.sqlite3_value_blob(p);
if (bDest == null) return nlen;
if (nCopied + nStart > bDest.Length) nCopied = bDest.Length - nStart;
if (nCopied + nDataOffset > nlen) nCopied = nlen - nDataOffset;
if (nCopied > 0)
Marshal.Copy((IntPtr) (ptr.ToInt32() + nDataOffset), bDest, nStart, nCopied);
else nCopied = 0;
return nCopied;
}
internal override double GetParamValueDouble(IntPtr ptr)
{
double value;
#if !PLATFORM_COMPACTFRAMEWORK
value = UnsafeNativeMethods.sqlite3_value_double(ptr);
#else
UnsafeNativeMethods.sqlite3_value_double_interop(ptr, out value);
#endif
return value;
}
internal override int GetParamValueInt32(IntPtr ptr)
{
return UnsafeNativeMethods.sqlite3_value_int(ptr);
}
internal override long GetParamValueInt64(IntPtr ptr)
{
Int64 value;
#if !PLATFORM_COMPACTFRAMEWORK
value = UnsafeNativeMethods.sqlite3_value_int64(ptr);
#else
UnsafeNativeMethods.sqlite3_value_int64_interop(ptr, out value);
#endif
return value;
}
internal override string GetParamValueText(IntPtr ptr)
{
#if !SQLITE_STANDARD
int len;
return UTF8ToString(UnsafeNativeMethods.sqlite3_value_text_interop(ptr, out len), len);
#else
return UTF8ToString(UnsafeNativeMethods.sqlite3_value_text(ptr), -1);
#endif
}
internal override TypeAffinity GetParamValueType(IntPtr ptr)
{
return UnsafeNativeMethods.sqlite3_value_type(ptr);
}
internal override void ReturnBlob(IntPtr context, byte[] value)
{
UnsafeNativeMethods.sqlite3_result_blob(context, value, value.Length, (IntPtr) (-1));
}
internal override void ReturnDouble(IntPtr context, double value)
{
#if !PLATFORM_COMPACTFRAMEWORK
UnsafeNativeMethods.sqlite3_result_double(context, value);
#else
UnsafeNativeMethods.sqlite3_result_double_interop(context, ref value);
#endif
}
internal override void ReturnError(IntPtr context, string value)
{
UnsafeNativeMethods.sqlite3_result_error(context, ToUTF8(value), value.Length);
}
internal override void ReturnInt32(IntPtr context, int value)
{
UnsafeNativeMethods.sqlite3_result_int(context, value);
}
internal override void ReturnInt64(IntPtr context, long value)
{
#if !PLATFORM_COMPACTFRAMEWORK
UnsafeNativeMethods.sqlite3_result_int64(context, value);
#else
UnsafeNativeMethods.sqlite3_result_int64_interop(context, ref value);
#endif
}
internal override void ReturnNull(IntPtr context)
{
UnsafeNativeMethods.sqlite3_result_null(context);
}
internal override void ReturnText(IntPtr context, string value)
{
byte[] b = ToUTF8(value);
UnsafeNativeMethods.sqlite3_result_text(context, ToUTF8(value), b.Length - 1, (IntPtr) (-1));
}
internal override IntPtr AggregateContext(IntPtr context)
{
return UnsafeNativeMethods.sqlite3_aggregate_context(context, 1);
}
internal override void SetPassword(byte[] passwordBytes)
{
int n = UnsafeNativeMethods.sqlite3_key(_sql, passwordBytes, passwordBytes.Length);
if (n > 0) throw new SQLiteException(n, SQLiteLastError());
}
internal override void ChangePassword(byte[] newPasswordBytes)
{
int n = UnsafeNativeMethods.sqlite3_rekey(_sql, newPasswordBytes,
(newPasswordBytes == null) ? 0 : newPasswordBytes.Length);
if (n > 0) throw new SQLiteException(n, SQLiteLastError());
}
internal override void SetUpdateHook(SQLiteUpdateCallback func)
{
UnsafeNativeMethods.sqlite3_update_hook(_sql, func, IntPtr.Zero);
}
internal override void SetCommitHook(SQLiteCommitCallback func)
{
UnsafeNativeMethods.sqlite3_commit_hook(_sql, func, IntPtr.Zero);
}
internal override void SetRollbackHook(SQLiteRollbackCallback func)
{
UnsafeNativeMethods.sqlite3_rollback_hook(_sql, func, IntPtr.Zero);
}
/// <summary>
/// Helper function to retrieve a column of data from an active statement.
/// </summary>
/// <param name="stmt">The statement being step()'d through</param>
/// <param name="index">The column index to retrieve</param>
/// <param name="typ">The type of data contained in the column. If Uninitialized, this function will retrieve the datatype information.</param>
/// <returns>Returns the data in the column</returns>
internal override object GetValue(SQLiteStatement stmt, int index, SQLiteType typ)
{
if (IsNull(stmt, index)) return DBNull.Value;
TypeAffinity aff = typ.Affinity;
Type t = null;
if (typ.Type != DbType.Object)
{
t = SQLiteTypeToType(typ);
aff = TypeToAffinity(t);
}
switch (aff)
{
case TypeAffinity.Blob:
if (typ.Type == DbType.Guid && typ.Affinity == TypeAffinity.Text)
return new Guid(GetText(stmt, index));
var n = (int) GetBytes(stmt, index, 0, null, 0, 0);
var b = new byte[n];
GetBytes(stmt, index, 0, b, 0, n);
if (typ.Type == DbType.Guid && n == 16)
return new Guid(b);
return b;
case TypeAffinity.DateTime:
return GetDateTime(stmt, index);
case TypeAffinity.Double:
if (t == null) return GetDouble(stmt, index);
else
return Convert.ChangeType(GetDouble(stmt, index), t, null);
case TypeAffinity.Int64:
if (t == null) return GetInt64(stmt, index);
else
return Convert.ChangeType(GetInt64(stmt, index), t, null);
default:
return GetText(stmt, index);
}
}
internal override int GetCursorForTable(SQLiteStatement stmt, int db, int rootPage)
{
#if !SQLITE_STANDARD
return UnsafeNativeMethods.sqlite3_table_cursor(stmt._sqlite_stmt, db, rootPage);
#else
return -1;
#endif
}
internal override long GetRowIdForCursor(SQLiteStatement stmt, int cursor)
{
#if !SQLITE_STANDARD
long rowid;
int rc = UnsafeNativeMethods.sqlite3_cursor_rowid(stmt._sqlite_stmt, cursor, out rowid);
if (rc == 0) return rowid;
return 0;
#else
return 0;
#endif
}
internal override void GetIndexColumnExtendedInfo(string database, string index, string column, out int sortMode,
out int onError, out string collationSequence)
{
#if !SQLITE_STANDARD
IntPtr coll;
int colllen;
int rc;
rc = UnsafeNativeMethods.sqlite3_index_column_info_interop(_sql, ToUTF8(database), ToUTF8(index),
ToUTF8(column), out sortMode, out onError,
out coll, out colllen);
if (rc != 0) throw new SQLiteException(rc, "");
collationSequence = UTF8ToString(coll, colllen);
#else
sortMode = 0;
onError = 2;
collationSequence = "BINARY";
#endif
}
}
}