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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘FreePascal’ Category

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TRURL – Free Pascal wiki: a class library for Object Pascal supporting the creation of virtual calculators with reverse Polish notation

Posted by jpluimers on 2025/07/15

On my list of libraries to play around with: [Wayback/Archive] TRURL – Free Pascal wiki

TRURL is a class library for Object Pascal supporting the creation of virtual calculators with reverse Polish notation (RPN). It comes with demo projects and several ready-to-use calculators for macOS, Linux and Windows.

TRURL is an acronym for “TRURL is a Reusable Universal RPN Library”.

Repositories:

Via [Wayback/Archive] TrurlTeam (@teamtrurl.bsky.social) — Bluesky.

--jeroen

Posted in Delphi, Development, FreePascal, Object Pascal, Pascal, Software Development | Leave a Comment »

GitHub – PascalCorpsman/FPC_DOOM: FPC Port of DOOM

Posted by jpluimers on 2025/07/03

Indeed: DOOM in Pascal. Not Delphi: Free Pascal.

Repository: [Wayback/Archive] GitHub – PascalCorpsman/FPC_DOOM: FPC Port of DOOM

It is based on [Wayback/Archive] GitHub – fabiangreffrath/crispy-doom: Crispy Doom is a limit-removing enhanced-resolution Doom source port based on Chocolate Doom..

Hopefully, this summer I can play around with it a bit.

Via [Wayback/Archive] International Pascal Congress on X: “DOOM in Pascal!! 😍👏👏 Do you want to play or compile it? 😉 #Pascal #ObjectPascal …”.

--jeroen

Posted in Conference Topics, Conferences, Delphi, Development, Event, FreePascal, Pascal, Power User, Retrocomputing, Software Development | Tagged: , | Leave a Comment »

Podcast with @mattgodbolt of godbolt.org fame, on among other things becoming a verb, 6502s, exploring compilers, and application binary interfaces.

Posted by jpluimers on 2025/05/21

From a while ago: [Wayback/Archive] Kristian Köhntopp on Twitter: “embedded.fm/episodes/334 Embedded.fm  with @mattgodbolt of godbolt.org  fame, on among other things becoming a verb, 6502s, exploring compilers, and application binary interfaces.”

Read the rest of this entry »

Posted in .NET, C#, C++, Development, FreePascal, Pascal, Software Development | Leave a Comment »

Delphi “array of const” to “varargs” – Stack Overflow

Posted by jpluimers on 2025/04/16

Just in case I ever think “oh, I might try want to go the Variadic function arguments way in Delphi” again, I must remember “maybe not a good idea” and re-read these posts:

Note that this example, despite the description indicates it is, it is actually not varargs by array of const (which requires using TVarRec as under the hood it is an open array of TVarRec): [Wayback/Archive] How to create functions that can accept variable number of parameters such as Format().

Then some Free Pascal links, which is different from, but also similar to Delphi:

Queries:

--jeroen

Posted in .NET, C, C#, Delphi, Development, FreePascal, Pascal, Software Development | Leave a Comment »

Jeff Duntemann on Twitter: “I adapted my book Borland Pascal 7 From Square One for FreePascal. This involved cutting out obsolete stuff like the BGI and TurboVision, and adding a few things here and there. I then released it as a free PDF ebook

Posted by jpluimers on 2021/12/21

Cool!

{Wayback] www.copperwood.com/pub/FreePascalFromSquareOne.pdf

This is the FreePascal adoption of Borland Pascal from Square One: Duntemann, Jeff

Via: [Archive.is] Jeff Duntemann on Twitter: “I adapted my book Borland Pascal 7 From Square One for FreePascal. This involved cutting out obsolete stuff like the BGI and TurboVision, and adding a few things here and there. I then released it as a free PDF ebook: #pascal #programmingisfun … “

–jeroen

Posted in Borland Pascal, Development, FreePascal, Pascal, Software Development | Leave a Comment »

Crosscompiling with Lazarus 1.8 on Linux Mint 18.3 | The Programming Works

Posted by jpluimers on 2020/01/08

As I will likely need this one day: [Archive.is / WayBack] Crosscompiling with Lazarus 1.8 on Linux Mint 18.3 | The Programming Works.

There are quite a few one-time manual setups to initially set this up, but after that it’s a piece of cake.

via:

–jeroen

Read the rest of this entry »

Posted in Development, FreePascal, Lazarus, Pascal, Software Development | Leave a Comment »

GitHub – Libaud/POLCLVCLISO: Pascal Object LCL and VCL ISO standards implementation for CodeTyphon, Delphi, Lazarus

Posted by jpluimers on 2020/01/02

For my link archive: GitHub – Libaud/POLCLVCLISO: Pascal Object LCL and VCL ISO standards implementation for CodeTyphon, Delphi, Lazarus

It implements these standards:

  • ISO standard 3166-1, 3166-2, 3166-3 implementation
    • (all part of the ISO 3166 – Wikipedia that “defines codes for the names of countries, dependent territories, special areas of geographical interest, and their principal subdivisions)”
  • ISO standard 4217 implementation
    • ISO 4217 – Wikipedia  “delineates currency designators, country codes (alpha and numeric)” where the country codes are the same as in ISO 3166
  • ITU E.164 standard implementation
    • E.164 – Wikipedia “E.164 defines a general format for international telephone numbers. Plan-conforming numbers are limited to a maximum of 15 digits, excluding the international call prefix.”

A library like this needs monitoring the standards changes, so hopefully Libaud will do that.

Some of my posts related to ISO 3166 are below.

–jeroen

Related:

 

Posted in Delphi, Development, FreePascal, Lazarus, Pascal, Software Development | Leave a Comment »

Delphi ^A syntax: Documented, implied, or undocumented? – Stack Overflow

Posted by jpluimers on 2019/12/12

The syntax is documented. In the Turbo Pasal 3 documentation, i.e. the Z80 era.

Source my answer to [WayBack] Delphi ^A syntax: Documented, implied, or undocumented? – Stack Overflow (I have added some WayBack Internet Archive links below) as it is from the Turbo Pascal era where the caret was introduced to support control characters:

This is from long ago as an escape character to enable you to have consts for control characters in a more readable way.
const
  CtrlC = ^C;
begin
  Write(Ord(CtrlC));
end.

This defines a Char constant with value #3, then writes 3 in Borland Pascal 7, and I remember seeing it years before that too.

I just checked the Turbo Pascal 5.0 and Borland Pascal 7.0 languages guides, but could not find it, so it seems undocumented.

Edit: I do remember this was a Borland thing, and just [WayBack] checked: it is not part of the ISO Pascal standard (formerly this was ANSI Pascal Standard, thanks Sertac for noticing this).

It [WayBack] is documented in the Free Pascal documentation [WayBack].

SGI uses the backslash as escape character, as per their docs [WayBack].

More Edit: I found it [WayBack] documented in Delphi in a Nutshell and the [WayBack] Delphi Basics site.

Found it: Just found it on page 37 of the Turbo Pascal 3 Reference Manual [WayBack].

(Marco van de Voort found the Free Pascal documentation)

It in fact originates in the 1984 Turbo Pascal 1 edition, as per the [WayBack] Turbo_Pascal_Reference_Manual_Feb84.pdf:

Read the rest of this entry »

Posted in Borland Pascal, Delphi, Development, FreePascal, History, Pascal, Software Development, Turbo Pascal, Z80 | 1 Comment »

tiOPF discussion thread

Posted by jpluimers on 2017/11/29

Sometimes the title of a G+ entry looks not so interesting, but then you read the comments. In this cast it’s about the mediator pattern support in the tiOPF object persistence framework, how it works very well from Free Pascal and both classic and  modern Delphi compilers and why developers dislike ARC. It’s cool as it allows you to decouple UI from business logic and separate out business logic from your application into a back-end. Recommended reading: [WayBack] Hello i have a program that use MS SQL SERVER 2000i want to make a mobile application that connect to this database to make some consultationclient fi… – Mohammed Bouhlal – Google+

–jeroen

Posted in Delphi, Development, FreePascal, Pascal, Software Development | Leave a Comment »

Kriscode.Hint := ‘Kris”s coding blog’: Lazarus IDE on ARM Ubuntu (Raspberry Pi, Ubuntu Touch, etc)

Posted by jpluimers on 2017/11/28

Interesting writeup as Lazarus and Free Pascal have come a long way: [WayBack] Kriscode.Hint := ‘Kris”s coding blog’: Lazarus IDE on ARM Ubuntu (Raspberry Pi, Ubuntu Touch, etc)

Via:

–jeroen

Posted in Development, FreePascal, Lazarus, Pascal, Software Development | Leave a Comment »

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