TweetFollow Us on Twitter

TML To LSP
Volume Number:2
Issue Number:12
Column Tag:Programmer's Forum

Notes From TML To LSP

By Thomas Scheiderich, Interez Travel Reservation Systems

For a while it seemed if you wanted to do any programming in Pascal on the Mac, you must either bear the cost of a Macintosh and a Lisa to do any serious programming, or you could always use MacPascal. Neither was an acceptable solution. Those with larger bank accounts could afford two machines but that was unacceptable for most of us. MacPascal was also unthinkable since it does not generate compiled code, but like most interpreters it is easier to develop code than the compile/link method.

Enter TML Pascal. When TML came onto the scene about a year ago, there were nothing but raves about the product. I was ecstatic when I started using it myself. The only capability that seemed to be missing was the ability to compile and link separate units. For many of us this was not a problem, as it was promised in a further release. So we all continued to develop our programs, and except for the units problem continued to rave about the program. How can you put down a product that measures up to equivalent compilers (C, Forth and Fortran) that cost three, four and five times as much. But as our programs got larger, compile times got longer and there was still no units capability. Four or five changes and compiles could take an hour or more.

Wouldn't it be nice to have the capabilities of both TML and MacPascal to do our development! And LightSpeed Pascal comes as close to this as I believe you are likely to see. I found I was developing code in hours that would have taken me days or weeks to do under TML.

This is not a review of LightSpeed Pascal, but an impression of the program I have from having used both TML and LightSpeed. I will be showing you some of the differences between the two development systems and some of the problems I encountered in my experience with the new program. It is important to note that these tests are run on a old 512K Mac with the old Roms and 400K drives.

First of all, for those of you who are currently using TML and wish to convert to LightSpeed, you will find the conversion very easy. The first step is to change the compiler directives. In your TML source you may have some lines similar to the following:

{$I MemTypes.ipas  }
{$I QuickDraw.ipas }
{$I OSIntf.ipas    }
{$I ToolIntf.ipas  }
{$I PackIntf.ipas  }
{$a+}
{$L  Grow/Rsrc }

These lines need to be removed and replaced with

{$I-}
{$R-}

The first line "{$I-}" tells the compiler that you don't want LightSpeed to do automatic initialization. You should always put this in your code or else the program may work when running in project mode and may not work when the code is converted into an application. The second line "{$R-}" tells the compiler you want range checking off. This is only necessary if you have this line in your TML code or you don't have the range checking option defined at all. This is because LightSpeed defaults to range checking on and TML defaults to range checking off. If you have range checking off in TML and range checking on in LightSpeed, code that worked under TML may not work under LightSpeed.

Second, if you are using a resource file, you must remove the ".REL" extension from the ".R." file and change it to anything else so that RMaker does not compile the resource file in REL format. LightSpeed suggests ".RSRC", but in actuality any extension or no extension will do. You must declare something, however, or RMaker won't compile the file. Then you run RMaker to create the new resource file. Next you must tell LightSpeed about the resource file by selecting "Run Options" from the Project menu. When the dialog box appears, check the resource box and choose the resource file to use (if you haven't converted the resource file from the REL format, the file won't appear).

Third, if you have your comments on multiple lines surrounded by only two curly braces you will get an error. For example:

{this comment section
must be changed}

which works in TML, must be changed to

{this comment section}
{must be changed}

for the code to work in LightSpeed.

This was all that was necessary to get my old TML code running under LightSpeed. My program is a terminal emulator for a Data General which uses multiple windows (text and drawing) and does file transfers. It currently is about 1200 lines long. I used this program for my testing and also the famous Sieve program to do comparisons between the two compilers.

The relative speeds and sizes are compared in the following tables. As can be seen from the tables, the application programs are larger (about 2k) in the LightSpeed versions. I talked to the LightSpeed people about this and apparently the program does a certain amount of routine stripping to keep the application to a reasonable size. The TML stripping linker is a little better (my application was 14K under TML version 1.0 and 8K under 1.1). Routines you reference may cause LightSpeed to pull in related routines even if they aren't used. This is apparently a tradeoff for speed. 2K seems to be close to the maximum difference between from TML and LightSpeed as can be seen from the graphs and tables.

The development speeds reflect the time it takes to make changes and and execute the programs. As can be seen you can make a change and test it in less than a minute (about 30 seconds if not saving the text). In TML this would take about 5 minutes - five to ten times longer.

The Sieve program has been used in benchmarks of other compilers and I decided to use it to compare these two. The code I used was:

PROCEDURE EXECUTE_SIEVE;
 CONST
 SIZE = 8190;
 VAR
 FLAGS : ARRAY[0..SIZE] OF BOOLEAN;
 I, PRIME, K, COUNT, ITER : INTEGER;
 TEXTSTRING : STR255;
 BEGIN
 GOTOXY(10, 10);
 DRAWSTRING('10 ITERATIONS. PRESS MOUSE WHEN READY TO GO!');
 REPEAT
 UNTIL BUTTON;
 FOR ITER := 1 TO 50 DO    {THIS IS USUALLY 1 TO 10}
 BEGIN
 COUNT := 0;
 FOR I := 0 TO SIZE DO
 FLAGS[I] := TRUE;
 FOR I := 0 TO SIZE DO
 IF FLAGS[I] THEN
 BEGIN
 PRIME := i + i + 3;
 {gotoxy(10, 12);}
 {ERASE_LINE(12, 10, 10);}
 {numtostring(prime, textstring);}
 {DRAWSTRING(TEXTSTRING);}
 k := i + prime;
 WHILE k <= size DO
 BEGIN
 flags[k] := false;
 k := k + prime;
 END;
 count := count + 1;
 END;
 END;
 gotoxy(10, 14);
 ERASE_LINE(14, 10, 15);
 numtostring(count, textstring);
 drawstring(textstring);
 gotoxy(15, 14);
 drawstring('primes');
 END;

It was rather interesting that if you display the prime numbers as they are found, TML seems a little faster and when the numbers aren't displayed LightSpeed seems a little faster. It seems that LightSpeed's computations are a little better but TML's handling of QuickDraw may be a little faster.

I would liked to have compared the units capability of the two compilers, except as of this writing, it was not available on TML. It is now released as version 2.0.

Some notes on LightSpeed:

Type cohersion cannot always be done within a procedure or a function statement. According to LightSpeed the rule is: if the variable in the procedure is a "var" parameter you cannot use type cohersion; if not a "var", you can. They say it is a high priority to make this more like Lisa Pascal by removing this restriction.

You cannot get the assembler source like you can in TML. This may be a problem if you want to optimize a piece of code. This is apparently not a high priority item with them. It would also be a little more difficult to do, according to them, because the compilation doesn't go through the normal "compile to assembler source" and then assemble that code. They go directly from Pascal source to machine code.

Segmentation is handled differently. LSP requires segmentation at unit boundaries, while TML allows the segment option to be placed directly in the code. Also, LSP uses all the space in the first segment for it's libraries so that your main program must be limited to about 5K in the first segment, with everything else in units placed in the second segment. Yet when the application is built, your program may fit entirely within segment one. Thus our 14K program required two segments with only a 5K main in segment one.

LSP also does not have objects and LS is moving slow on this. TML on the other hand supports objects in 2.0.

All in all, I was very impressed with the product and had no problems with it, once I found out about the range checking, REL resource and curly brackets differences. I think there is going to be less of a demand for MPW with this around.

 
AAPL
$97.03
Apple Inc.
-0.16
MSFT
$44.40
Microsoft Corpora
-0.47
GOOG
$593.35
Google Inc.
-2.63

MacTech Search:
Community Search:

Software Updates via MacUpdate

Audio Hijack Pro 2.11.0 - Record and enh...
Audio Hijack Pro drastically changes the way you use audio on your computer, giving you the freedom to listen to audio when you want and how you want. Record and enhance any audio with Audio Hijack... Read more
Intermission 1.1.1 - Pause and rewind li...
Intermission allows you to pause and rewind live audio from any application on your Mac. Intermission will buffer up to 3 hours of audio, allowing users to skip through any assortment of audio... Read more
Airfoil 4.8.7 - Send audio from any app...
Airfoil allows you to send any audio to AirPort Express units, Apple TVs, and even other Macs and PCs, all in sync! It's your audio - everywhere. With Airfoil you can take audio from any... Read more
Microsoft Remote Desktop 8.0.8 - Connect...
With Microsoft Remote Desktop, you can connect to a remote PC and your work resources from almost anywhere. Experience the power of Windows with RemoteFX in a Remote Desktop client designed to help... Read more
xACT 2.30 - Audio compression toolkit. (...
xACT stands for X Aaudio Compression Toolkit, an application that encodes and decodes FLAC, SHN, Monkey’s Audio, TTA, Wavpack, and Apple Lossless files. It also can encode these formats to MP3, AAC... Read more
Firefox 31.0 - Fast, safe Web browser. (...
Firefox for Mac offers a fast, safe Web browsing experience. Browse quickly, securely, and effortlessly. With its industry-leading features, Firefox is the choice of Web development professionals... Read more
Little Snitch 3.3.3 - Alerts you to outg...
Little Snitch gives you control over your private outgoing data. Track background activityAs soon as your computer connects to the Internet, applications often have permission to send any... Read more
Thunderbird 31.0 - Email client from Moz...
As of July 2012, Thunderbird has transitioned to a new governance model, with new features being developed by the broader free software and open source community, and security fixes and improvements... Read more
Together 3.2 - Store and organize all of...
Together helps you organize your Mac, giving you the ability to store, edit and preview your files in a single clean, uncluttered interface. Smart storage. With simple drag-and-drop functionality,... Read more
Cyberduck 4.5 - FTP and SFTP browser. (F...
Cyberduck is a robust FTP/FTP-TLS/SFTP browser for the Mac whose lack of visual clutter and cleverly intuitive features make it easy to use. Support for external editors and system technologies such... Read more

Latest Forum Discussions

See All

LEX Goes Free For One Day In Honor of Ne...
LEX Goes Free For One Day In Honor of New Update Posted by Jennifer Allen on July 24th, 2014 [ permalink ] Universal App - Designed for iPhone and iPad | Read more »
Thomas Was Alone Goes Universal, Slashes...
Thomas Was Alone Goes Universal, Slashes Price to $3.99 Posted by Ellis Spice on July 24th, 2014 [ permalink ] Universal App - Designed for iPhone and iPad | Read more »
Meerkatz Challenge Review
Meerkatz Challenge Review By Jennifer Allen on July 24th, 2014 Our Rating: :: FONDLY PUZZLINGUniversal App - Designed for iPhone and iPad Cute and challenging, Meerkatz Challenge is a fun puzzle game, particularly for fans of... | Read more »
Book Your Appointment with F.E.A.R. this...
Book Your Appointment with F.E.A.R. | Read more »
It Came From Canada: Epic Skater
For all the hate that it gets for being a pastime for slackers, skateboarding really does require a lot of skill. All those flips and spins take real athleticism, and there’s all the jargon to memorize. Fortunately for us less extreme individuals,... | Read more »
Cultures Review
Cultures Review By Jennifer Allen on July 24th, 2014 Our Rating: :: SLOW-PACED EMPIRE BUILDINGiPad Only App - Designed for the iPad Cute it might seem, but Cultures is a bit too slow paced when it comes to those pesky timers to... | Read more »
More Paintings Have Been Added to Paint...
More Paintings Have Been Added to Paint it Back! Posted by Jessica Fisher on July 24th, 2014 [ permalink ] Universal App - Designed for iPhone and iPad | Read more »
The Order of Souls Review
The Order of Souls Review By Campbell Bird on July 24th, 2014 Our Rating: :: STORY GRINDUniversal App - Designed for iPhone and iPad The Order of Souls is a free-to-play, turn-based RPG with a genre-mixing art style, interesting... | Read more »
Revolution 60 Review
Revolution 60 Review By Jordan Minor on July 24th, 2014 Our Rating: :: LASS EFFECTUniversal App - Designed for iPhone and iPad Revolution 60 is a bold, cinematic action game with ambition to spare.   | Read more »
Matter (Photography)
Matter 1.0.1 Device: iOS Universal Category: Photography Price: $1.99, Version: 1.0.1 (iTunes) Description: Add stunning 3D effects to your photos with real-time shadows and reflections. Export your creations as photos or video loops... | Read more »

Price Scanner via MacPrices.net

Global Tablet Market Grows 11% in Q2/14 Notwi...
Worldwide tablet sales grew 11.0 percent year over year in the second quarter of 2014, with shipments reaching 49.3 million units according to preliminary data from the International Data Corporation... Read more
Save on 5th generation refurbished iPod touch...
The Apple Store has Apple Certified Refurbished 5th generation iPod touches available starting at $149. Apple’s one-year warranty is included with each model, and shipping is free. Many, but not all... Read more
What Should Apple’s Next MacBook Priority Be;...
Stabley Times’ Phil Moore says that after expanding its iMac lineup with a new low end model, Apple’s next Mac hardware decision will be how it wants to approach expanding its MacBook lineup as well... Read more
ArtRage For iPhone Painting App Free During C...
ArtRage for iPhone is currently being offered for free (regularly $1.99) during Comic-Con San Diego #SDCC, July 24-27, in celebration of the upcoming ArtRage 4.5 and other 64-bit versions of the... Read more
With The Apple/IBM Alliance, Is The iPad Now...
Almost since the iPad was rolled out in 2010, and especially after Apple made a 128 GB storage configuration available in 2012, there’s been debate over whether the iPad is a serious tool for... Read more
MacBook Airs on sale starting at $799, free s...
B&H Photo has the new 2014 MacBook Airs on sale for up to $100 off MSRP for a limited time. Shipping is free, and B&H charges NY sales tax only. They also include free copies of Parallels... Read more
Apple 27″ Thunderbolt Display (refurbished) a...
The Apple Store has Apple Certified Refurbished 27″ Thunderbolt Displays available for $799 including free shipping. That’s $200 off the cost of new models. Read more
WaterField Designs Unveils Cycling Ride Pouch...
High end computer case and bag maker WaterField Designs of San Francisco now enters the cycling market with the introduction of the Cycling Ride Pouch – an upscale toolkit with a scratch-free iPhone... Read more
Kingston Digital Ships Large Capacity Near 1T...
Kingston Digital, Inc., the Flash memory affiliate of Kingston Technology Company, Inc.,has announced its latest addition to the SSDNow V300 series, the V310. The Kingston SSDNow V310 solid-state... Read more
Apple’s Fiscal Third Quarter Results; Record...
Apple has announced financial results for its fiscal 2014 third quarter ended June 28, 2014, racking up quarterly revenue of $37.4 billion and quarterly net profit of $7.7 billion, or $1.28 per... Read more

Jobs Board

Sr. Project Manager for *Apple* Campus 2 -...
…the design and construction of one building or building components of the New Apple Campus located in Cupertino, CA. They will provide project management oversight for Read more
WW Sales Program Manager, *Apple* Online St...
**Job Summary** Imagine what you could do here. At Apple , great ideas have a way of becoming great products, services, and customer experiences very quickly. Bring Read more
*Apple* Solutions Consultant (ASC) - Apple (...
**Job Summary** The ASC is an Apple employee who serves as an Apple brand ambassador and influencer in a Reseller's store. The ASC's role is to grow Apple Read more
Project Manager / Business Analyst, WW *Appl...
…a senior project manager / business analyst to work within our Worldwide Apple Fulfillment Operations and the Business Process Re-engineering team. This role will work Read more
Sr. Manager, *Apple* Deployment Programs fo...
**Job Summary** Apple is seeking candidates for a new position on the Education Content and Technology team. iPad and Mac is in the hands of millions of teachers and Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.