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unit SQLite3;
{
Simplified interface for SQLite.
Updated for Sqlite 3 by Tim Anderson (tim@itwriting.com)
Note: NOT COMPLETE for version 3, just minimal functionality
Adapted from file created by Pablo Pissanetzky (pablo@myhtpc.net)
which was based on SQLite.pas by Ben Hochstrasser (bhoc@surfeu.ch)
}
interface
const
SQLiteDLL = 'sqlite3.dll';
// Return values for sqlite3_exec() and sqlite3_step()
SQLITE_OK = 0; // Successful result
SQLITE_ERROR = 1; // SQL error or missing database
SQLITE_INTERNAL = 2; // An internal logic error in SQLite
SQLITE_PERM = 3; // Access permission denied
SQLITE_ABORT = 4; // Callback routine requested an abort
SQLITE_BUSY = 5; // The database file is locked
SQLITE_LOCKED = 6; // A table in the database is locked
SQLITE_NOMEM = 7; // A malloc() failed
SQLITE_READONLY = 8; // Attempt to write a readonly database
SQLITE_INTERRUPT = 9; // Operation terminated by sqlite3_interrupt()
SQLITE_IOERR = 10; // Some kind of disk I/O error occurred
SQLITE_CORRUPT = 11; // The database disk image is malformed
SQLITE_NOTFOUND = 12; // (Internal Only) Table or record not found
SQLITE_FULL = 13; // Insertion failed because database is full
SQLITE_CANTOPEN = 14; // Unable to open the database file
SQLITE_PROTOCOL = 15; // Database lock protocol error
SQLITE_EMPTY = 16; // Database is empty
SQLITE_SCHEMA = 17; // The database schema changed
SQLITE_TOOBIG = 18; // Too much data for one row of a table
SQLITE_CONSTRAINT = 19; // Abort due to contraint violation
SQLITE_MISMATCH = 20; // Data type mismatch
SQLITE_MISUSE = 21; // Library used incorrectly
SQLITE_NOLFS = 22; // Uses OS features not supported on host
SQLITE_AUTH = 23; // Authorization denied
SQLITE_FORMAT = 24; // Auxiliary database format error
SQLITE_RANGE = 25; // 2nd parameter to sqlite3_bind out of range
SQLITE_NOTADB = 26; // File opened that is not a database file
SQLITE_ROW = 100; // sqlite3_step() has another row ready
SQLITE_DONE = 101; // sqlite3_step() has finished executing
SQLITE_INTEGER = 1;
SQLITE_FLOAT = 2;
SQLITE_TEXT = 3;
SQLITE_BLOB = 4;
SQLITE_NULL = 5;
type
TSQLiteDB = Pointer;
TSQLiteResult = ^PChar;
TSQLiteStmt = Pointer;
function SQLite3_Open(dbname: PChar; var db: TSqliteDB): integer; cdecl; external 'sqlite3.dll' name 'sqlite3_open';
function SQLite3_Close(db: TSQLiteDB): integer; cdecl; external 'sqlite3.dll' name 'sqlite3_close';
function SQLite3_Exec(db: TSQLiteDB; SQLStatement: PChar; CallbackPtr: Pointer; Sender: TObject; var ErrMsg: PChar): integer; cdecl; external 'sqlite3.dll' name 'sqlite3_exec';
function SQLite3_Version(): PChar; cdecl; external 'sqlite3.dll' name 'sqlite3_libversion';
function SQLite3_ErrMsg(db: TSQLiteDB): PChar; cdecl; external 'sqlite3.dll' name 'sqlite3_errmsg';
function SQLite3_ErrCode(db: TSQLiteDB): integer; cdecl; external 'sqlite3.dll' name 'sqlite3_errcode';
procedure SQlite3_Free(P: PChar); cdecl; external 'sqlite3.dll' name 'sqlite3_free';
function SQLite3_GetTable(db: TSQLiteDB; SQLStatement: PChar; var ResultPtr: TSQLiteResult; var RowCount: Cardinal; var ColCount: Cardinal; var ErrMsg: PChar): integer; cdecl; external 'sqlite3.dll' name 'sqlite3_get_table';
procedure SQLite3_FreeTable(Table: TSQLiteResult); cdecl; external 'sqlite3.dll' name 'sqlite3_free_table';
function SQLite3_Complete(P: PChar): boolean; cdecl; external 'sqlite3.dll' name 'sqlite3_complete';
function SQLite3_LastInsertRowID(db: TSQLiteDB): int64; cdecl; external 'sqlite3.dll' name 'sqlite3_last_insert_rowid';
procedure SQLite3_Interrupt(db: TSQLiteDB); cdecl; external 'sqlite3.dll' name 'sqlite3_interrupt';
procedure SQLite3_BusyHandler(db: TSQLiteDB; CallbackPtr: Pointer; Sender: TObject); cdecl; external 'sqlite3.dll' name 'sqlite3_busy_handler';
procedure SQLite3_BusyTimeout(db: TSQLiteDB; TimeOut: integer); cdecl; external 'sqlite3.dll' name 'sqlite3_busy_timeout';
function SQLite3_Changes(db: TSQLiteDB): integer; cdecl; external 'sqlite3.dll' name 'sqlite3_changes';
function SQLite3_TotalChanges(db: TSQLiteDB): integer; cdecl; external 'sqlite3.dll' name 'sqlite3_total_changes';
function SQLite3_Prepare(db: TSQLiteDB; SQLStatement: PChar; nBytes: integer; var hStmt: TSqliteStmt; var pzTail: PChar): integer; cdecl; external 'sqlite3.dll' name 'sqlite3_prepare';
function SQLite3_ColumnCount(hStmt: TSqliteStmt): integer; cdecl; external 'sqlite3.dll' name 'sqlite3_column_count';
function Sqlite3_ColumnName(hStmt: TSqliteStmt; ColNum: integer): pchar; cdecl; external 'sqlite3.dll' name 'sqlite3_column_name';
function Sqlite3_ColumnDeclType(hStmt: TSqliteStmt; ColNum: integer): pchar; cdecl; external 'sqlite3.dll' name 'sqlite3_column_decltype';
function Sqlite3_Step(hStmt: TSqliteStmt): integer; cdecl; external 'sqlite3.dll' name 'sqlite3_step';
function SQLite3_DataCount(hStmt: TSqliteStmt): integer; cdecl; external 'sqlite3.dll' name 'sqlite3_data_count';
function Sqlite3_ColumnBlob(hStmt: TSqliteStmt; ColNum: integer): pointer; cdecl; external 'sqlite3.dll' name 'sqlite3_column_blob';
function Sqlite3_ColumnBytes(hStmt: TSqliteStmt; ColNum: integer): integer; cdecl; external 'sqlite3.dll' name 'sqlite3_column_bytes';
function Sqlite3_ColumnDouble(hStmt: TSqliteStmt; ColNum: integer): double; cdecl; external 'sqlite3.dll' name 'sqlite3_column_double';
function Sqlite3_ColumnInt(hStmt: TSqliteStmt; ColNum: integer): integer; cdecl; external 'sqlite3.dll' name 'sqlite3_column_int';
function Sqlite3_ColumnText(hStmt: TSqliteStmt; ColNum: integer): pchar; cdecl; external 'sqlite3.dll' name 'sqlite3_column_text';
function Sqlite3_ColumnType(hStmt: TSqliteStmt; ColNum: integer): integer; cdecl; external 'sqlite3.dll' name 'sqlite3_column_type';
function Sqlite3_ColumnInt64(hStmt: TSqliteStmt; ColNum: integer): Int64; cdecl; external 'sqlite3.dll' name 'sqlite3_column_int64';
function SQLite3_Finalize(hStmt: TSqliteStmt): integer; cdecl; external 'sqlite3.dll' name 'sqlite3_finalize';
function SQLite3_Reset(hStmt: TSqliteStmt): integer; cdecl; external 'sqlite3.dll' name 'sqlite3_reset';
//
// In the SQL strings input to sqlite3_prepare() and sqlite3_prepare16(),
// one or more literals can be replace by a wildcard "?" or ":N:" where
// N is an integer. These value of these wildcard literals can be set
// using the routines listed below.
//
// In every case, the first parameter is a pointer to the sqlite3_stmt
// structure returned from sqlite3_prepare(). The second parameter is the
// index of the wildcard. The first "?" has an index of 1. ":N:" wildcards
// use the index N.
//
// The fifth parameter to sqlite3_bind_blob(), sqlite3_bind_text(), and
//sqlite3_bind_text16() is a destructor used to dispose of the BLOB or
//text after SQLite has finished with it. If the fifth argument is the
// special value SQLITE_STATIC, then the library assumes that the information
// is in static, unmanaged space and does not need to be freed. If the
// fifth argument has the value SQLITE_TRANSIENT, then SQLite makes its
// own private copy of the data.
//
// The sqlite3_bind_* routine must be called before sqlite3_step() after
// an sqlite3_prepare() or sqlite3_reset(). Unbound wildcards are interpreted
// as NULL.
//
function SQLite3_BindBlob(hStmt: TSqliteStmt; ParamNum: integer;
ptrData: pointer; numBytes: integer; ptrDestructor: pointer): integer;
cdecl; external 'sqlite3.dll' name 'sqlite3_bind_blob';
function SQLiteFieldType(SQLiteFieldTypeCode: Integer): AnsiString;
function SQLiteErrorStr(SQLiteErrorCode: Integer): AnsiString;
implementation
uses
SysUtils;
function SQLiteFieldType(SQLiteFieldTypeCode: Integer): AnsiString;
begin
case SQLiteFieldTypeCode of
SQLITE_INTEGER: Result := 'Integer';
SQLITE_FLOAT: Result := 'Float';
SQLITE_TEXT: Result := 'Text';
SQLITE_BLOB: Result := 'Blob';
SQLITE_NULL: Result := 'Null';
else
Result := 'Unknown SQLite Field Type Code "' + IntToStr(SQLiteFieldTypeCode) + '"';
end;
end;
function SQLiteErrorStr(SQLiteErrorCode: Integer): AnsiString;
begin
case SQLiteErrorCode of
SQLITE_OK: Result := 'Successful result';
SQLITE_ERROR: Result := 'SQL error or missing database';
SQLITE_INTERNAL: Result := 'An internal logic error in SQLite';
SQLITE_PERM: Result := 'Access permission denied';
SQLITE_ABORT: Result := 'Callback routine requested an abort';
SQLITE_BUSY: Result := 'The database file is locked';
SQLITE_LOCKED: Result := 'A table in the database is locked';
SQLITE_NOMEM: Result := 'A malloc() failed';
SQLITE_READONLY: Result := 'Attempt to write a readonly database';
SQLITE_INTERRUPT: Result := 'Operation terminated by sqlite3_interrupt()';
SQLITE_IOERR: Result := 'Some kind of disk I/O error occurred';
SQLITE_CORRUPT: Result := 'The database disk image is malformed';
SQLITE_NOTFOUND: Result := '(Internal Only) Table or record not found';
SQLITE_FULL: Result := 'Insertion failed because database is full';
SQLITE_CANTOPEN: Result := 'Unable to open the database file';
SQLITE_PROTOCOL: Result := 'Database lock protocol error';
SQLITE_EMPTY: Result := 'Database is empty';
SQLITE_SCHEMA: Result := 'The database schema changed';
SQLITE_TOOBIG: Result := 'Too much data for one row of a table';
SQLITE_CONSTRAINT: Result := 'Abort due to contraint violation';
SQLITE_MISMATCH: Result := 'Data type mismatch';
SQLITE_MISUSE: Result := 'Library used incorrectly';
SQLITE_NOLFS: Result := 'Uses OS features not supported on host';
SQLITE_AUTH: Result := 'Authorization denied';
SQLITE_FORMAT: Result := 'Auxiliary database format error';
SQLITE_RANGE: Result := '2nd parameter to sqlite3_bind out of range';
SQLITE_NOTADB: Result := 'File opened that is not a database file';
SQLITE_ROW: Result := 'sqlite3_step() has another row ready';
SQLITE_DONE: Result := 'sqlite3_step() has finished executing';
else
Result := 'Unknown SQLite Error Code "' + IntToStr(SQLiteErrorCode) + '"';
end;
end;
function ColValueToStr(Value: PChar): AnsiString;
begin
if (Value = nil) then
Result := 'NULL'
else
Result := Value;
end;
end.
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