PTSource Native binaries are based on Harbour. Harbour is the open/free software implementation of a cross-platform, multi-threading, object-oriented, scriptable programming language, backwards compatible with xBase languages. Harbour consists of a compiler and runtime libraries with multiple UI, database and I/O backends, its own build system and a collection of libraries and bindings for popular APIs. With Harbour, you can build apps running on GNU/Linux, Windows (32/64-bit), macOS, iOS, Android, *BSD, *nix, and more.

Database support

Harbour extends the Clipper Replaceable Database Drivers (RDD) approach. It offers multiple RDDs such as DBASE, DBFNTX, DBFCDX, DBFDBT and DBFFPT. In Harbour multiple RDDs can be used in a single application, and new logical RDDs can be defined by combining other RDDs. The RDD architecture allows for inheritance, so that a given RDD may extend the functionality of other existing RDD(s). Third-party RDDs, like RDDSQL, RDDSIX, RMDBFCDX, Advantage Database Server, and Mediator exemplify some of the RDD architecture features. DBFNTX implementation has almost same functionality of DBFCDX and RDDSIX. NETIO and LetoDB provide remote access over Transmission Control Protocol protocol.

Harbour also offers ODBC support by means of an Object-oriented programming syntax, and ActiveX Data Objects support by means of OLE Automation. MySQL, PostgreSQL, SQLite, Firebird (database server), Oracle (database) are examples of databases which Harbour can connect.

xBase technologies often is confused with a RDBMS software. Although this is true, xBase is more than a simple database system as the same time xBase languages using purely DBF can not provide full concept of a real RDBMS.

Macro Operator (runtime compiler)

One of the most powerful features of xBase languages is the Macro (computer science) Operator '&'. Harbour's implementation of the Macro Operator allows for runtime compilation of any valid Harbour expression. Such a compiled expression may be used as a VALUE, i.e. the right side of an assignment (rvalue), but such a compiled expression may be used to resolve the left side (lvalue) of an assignment, i.e. private, or public variables, or a database field.

Additionally, the Macro Operator may compile and execute function calls, complete assignments, or even list of arguments, and the result of the macro may be used to resolve any of the above contexts in the compiled application. In other words, any Harbour application may be extended and modified at runtime to compile and execute additional code on-demand.

Latest Macro compiler can compile any valid Harbour code including code to pre-process before compile.