Archives - August 2010 - Synopse Open Source

2010-08-24

Synopse SQLite3 Framework 1.9.1

By AB4327-GANDI, 2010-08-24. Open Source › mORMot Framework

The Synopse SQLite3 Database Framework was just released under version 1.9.1:
- internal SQLite3 database engine is updated to version 3.7.2;
- new TSQLRecordFTS3 record, for using FTS3 virtual tables, i.e. implementing full-text search;
- new SQLite3UIEdit unit, to edit table content with a dialog created from RTTI;
- new dedicated BLOB methods and JSON array serialization;
- a lot of fixes and speed enhancements (including our HTTP/1.1 RESTful server now using Thread Pool).

The new 3.7.2 version of the SQLite3 engine, which is mandatory according to SQLite3's authors, is included.

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2010-08-19

How to implement multi-tier architecture in our SQLite3 Framework

By AB4327-GANDI, 2010-08-19. Open Source › mORMot Framework

In software engineering, multi-tier architecture (often referred to as n-tier architecture) is a client–server architecture in which the presentation, the application processing, and the data management are logically separate processes. For example, an application that uses middleware to service data requests between a user and a database employs multi-tier architecture. The most widespread use of multi-tier architecture is the three-tier architecture.

Both ORM and RESTful aspects of our framework makes it easy to develop using such a three-tier architecture.

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2010-08-14

FPC and Delphi: toward a "fratricidal war"?

By AB4327-GANDI, 2010-08-14. Pascal Programming

Speaking about [upcoming] 64 bit Delphi compiler, I did forecast they will surely release their compiler 5 years later than FPC's... hoping they will follow the FPC way, just as Intel did about 64 bits instructions, against AMD.

What I was referring to is that AMD was the first to publish a 64 bit x86 CPU, with a new instruction set. Intel released somewhat later their own 64 bit x86 CPU, following the same instruction set.
There are some variants between AMD and Intel CPU, some dedicated instructions or implementations.
But most instruction set is perfectly compatible.

And I suspect the more it gets, the less compatible FPC and Delphi will be.

The main difference between Delphi and FPC is that the first is a business company project (Embarcadero), the second an Open Source solution. They are not two billions dollars companies fighting each other, with some state-level institutions watching about any unfair competition or monopoly... FPC compiler is technically a great and robust project, but EMB follows business rules. I don't think anyone will play "Anti-monopoly" in favor of FPC.

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2010-08-10

Writing Delphi code for 64 bits compiler

By AB4327-GANDI, 2010-08-10. Pascal Programming

There will be an upcoming 64 bits Delphi compiler. Embarcadero promised it.

Florian (the architect of FPC) showed a first "Hello world" program for Win64 in March 2006.
This was remarkable since GCC and the binutils don't even support this target at this time.
In fact, FPC used its Internal linker on Win32 and Win64 platforms, just like Delphi does.

Here are some points on how you could make your code ready to compile under FPC 64 bits, therefore (I hope) under future Delphi 64 bits compiler.

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2010-08-07

Every Delphi DB program contains hidden code for EMB license checking

By AB4327-GANDI, 2010-08-07. Pascal Programming

blog

After looking further at the SysUtils unit, I found out some small piece of asm code I didn't notice at first.

There is some hidden and not documented code in every program using the DB features, in order to verify that you have the right to use some drivers or DB features.

The license checking performed by Borland (it was a trick existing in Delphi 4, or perhaps before) is somewhat childish.

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2010-08-06

Save object, stop class hegemony!

By AB4327-GANDI, 2010-08-06. Pascal Programming

In a recent thread in the Embarcadero Discussion Forums, Vedran Vuk posted some questions about object keyword.
His purpose was to use object instead of class to improve speed and memory consumption:

I do use classes. I just want to use objects on smaller classes that don't really need initialization or RTTI. Plus, I can directly operate on it like a record with no need for constructors and it can be sealed and has inheritance. Every byte matters in this case.

Rudy posted on the EMB forum that

The "object" type is deprecated. As was said, it mainly exists for compatibility with old Turbo Pascal. That is why it is not documented very well. It's use is not promoted.

I have the same requirement sometimes, for example for our framework or for low-level units.

I do like such plain-old object type, and don't want to see this object feature marked as deprecated in future EMB versions.

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2010-08-04

Synopse SQLite3 Framework Main Demo - draft

By AB4327-GANDI, 2010-08-04. Open Source › mORMot Framework

The SQLite3 MainDemo source code has just been uploaded to the repository.

This application is just a database tool which stores text content and files into the database, in both clear and "safe" manner. Safe records are stored using AES-256/SHA-256 encryption. There is an Audit Trail table for tracking the changes.

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August 2010 (7)