via: Curl: Delphi binding [WayBack]
–jeroen
Archive for the ‘Delphi’ Category
Mercury13/curl4delphi: A little libcURL binding for Delphi XE2+. Supports “easy” interface only. See wiki for more documentation.
Posted by jpluimers on 2017/10/03
Posted in Delphi, Delphi XE2, Development, Software Development | Leave a Comment »
How I use Linux to write software for multiple target platforms using Wine, Delphi 7, Lazarus and Delphi Berlin
Posted by jpluimers on 2017/09/27
How I use Linux to write software for multiple target platforms – Kris Kamil Jacewicz – Google+
WINE has come a long way. Many things do not have a native look and feel, but so do many Delphi FMX or Lazarus LCL applications.
In fact I use quite a few tools (including Mikrotik WinBox) through Wine on Mac OS and it runs a lot more stable than quite a few of the FMX applications I’ve tried and ditched.
So for business applications not requiring a platform specific look and feel this indeed is quite acceptable direction to follow.
More at http://kriscode.blogspot.tw/2016/10/how-i-use-linux-to-write-software-for.html
–jeroen
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Posted in Delphi, Development, Software Development | 2 Comments »
Looking for more examples of Unicode/Ansi oddities in Delphi 2009+
Posted by jpluimers on 2017/09/25
At the end of April 2014, Roman Yankovsky started a nice [Wayback] discussion on Google+ trying to get upvotes for [Wayback] QualityCentral Report #: 124402: Compiler bug when comparing chars.
His report basically comes down to that when using Ansi character literals like #255, the compiler treats them as single-byte encoded characters in the current code page of your Windows context, translates them to Unicode, then processes them.
The QC report has been dismissed as “Test Case Error” (within 15 minutes of stating “need more info”) by one of the compiler engineers, directing to the [Wayback] UsingCharacterLiterals section of Delphi in a Unicode World Part III: Unicodifying Your Code where – heaven forbid – they suggest to replace #128 with the Euro-Sign literal.
I disagree, as the issue happens without any hint or warning whatsoever, and causes code that compiles fine in Delphi <= 2007 to fail in subtle ways on Delphi >= 2009.
The compiler should issue a hint or warning when you potentially can screw up. It doesn’t. Not here.
Quite a few knowledgeable Delphi people got involved in the discussion:
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Posted in Ansi, ASCII, Conference Topics, Conferences, CP437/OEM 437/PC-8, Delphi, Delphi 2006, Delphi 2007, Delphi 2009, Delphi 2010, Delphi 7, Delphi XE, Delphi XE2, Delphi XE3, Delphi XE4, Delphi XE5, Delphi XE6, Development, Encoding, Event, ISO-8859, Missed Schedule, QC, SocialMedia, Software Development, Unicode, UTF-8, Windows-1252, WordPress | Leave a Comment »
Dependency Analysis – Pascal Today
Posted by jpluimers on 2017/09/20
Tools and steps for analysing Delphi or FreePascal code: Dependency Analysis – Pascal Today [WayBack]
Used tools:
- Delphi Unit Dependency Scanner [WayBack]
- Gephi – The Open Graph Viz Platform [WayBack]
- yEd – Graph Editor [WayBack]
yEd is a free desktop application to quickly create, import, edit, and automatically arrange diagrams. It runs on Windows, Mac OS X, and Unix/Linux.
–jeroen
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Posted in Delphi, Development, Software Development | 2 Comments »
delphi – Is AtomicCmpExchange reliable on all platforms? – Stack Overflow
Posted by jpluimers on 2017/09/19
TL;DR: yes it is.
Answer by Allen Bauer at delphi – Is AtomicCmpExchange reliable on all platforms? – Stack Overflow [WayBack]
On Windows, it directly translates into lock cmpxchg which is way faster than the Windows API call [WayBack] InterlockedCompareExchange, as that is a jump to the actual code:
InterlockedCompareExchange: 00417CA8 FF2528E12901 jmp dword ptr [$0129e128]KERNEL32.InterlockedCompareExchange: 75855E40 8BFF mov edi,edi 75855E42 55 push ebp 75855E43 8BEC mov ebp,esp 75855E45 8B550C mov edx,[ebp+$0c] 75855E48 8B4D08 mov ecx,[ebp+$08] 75855E4B 8B4510 mov eax,[ebp+$10] 75855E4E F00FB111 lock cmpxchg [ecx],edx 75855E52 5D pop ebp 75855E53 C20C00 ret $000c
whereas AtomicCmdExchange looks like this:
Test.pas.20: RestoreValue := AtomicCmpExchange(FieldToBeModfied, 1 {new value}, 0 {expected value}, Success {true if the expected value was found, and new value set}); 0111A838 8B45FC mov eax,[ebp-$04] 0111A83B 8D500C lea edx,[eax+$0c] 0111A83E 33C0 xor eax,eax 0111A840 B901000000 mov ecx,$00000001 0111A845 F00FB10A lock cmpxchg [edx],ecx 0111A849 0F9445F2 setz byte ptr [ebp-$0e] 0111A84D 8945D8 mov [ebp-$28],eax
–jeroen
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Posted in Delphi, Development, Software Development | Leave a Comment »
Checking KeyPress is not the place to do your input validation
Posted by jpluimers on 2017/09/19
I have seen too many projects over the years trying to do input validation by checking KeyPress. This is not limited to Delphi projects (C#, VB and other projects suffer from this just as much). Most of these projects suffer from these::
- Much of the KeyPress logic logic in the UI byusing half-baked copy-pasted code fragments.
- They all fail missing important functionality (like paste, clear, Ctrl-key handling and such) either supporting or suppressing that functionality where needed
If doing Delphi, then that code should be rewritten in a generic way based on examples like like these:
- http://www.devsuperpage.com/search/Articles.asp?ArtID=857874 [WayBack]
- https://groups.google.com/forum/#!search/TNumberEdit$20Peter$20Below
–jeroen
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Posted in .NET, Delphi, Development, Software Development, Windows Development | Leave a Comment »
Delphi code of the day…
Posted by jpluimers on 2017/09/11
I was debugging an issue where a Delphi SOAP implementation was shoe-horned into an Indy server and came across the [WayBack] TWebRequest.UpdateMethodType Method.
The further you get down the if/then/else tree, the more often the indexed property Method is accessed, same for the conversion/comparison code.
property Method: string index 0 read GetStringVariable;
So if the HTTP method is POST (very common), then the calls are being made 3 times:
procedure TWebRequest.UpdateMethodType;
begin
{$IFDEF NEXTGEN}
if Method = 'GET' then { do not localize }
FMethodType := mtGet
else if Method = 'PUT' then { do not localize }
FMethodType := mtPut
else if Method = 'POST' then { do not localize }
FMethodType := mtPost
else if Method = 'HEAD' then { do not localize }
FMethodType := mtHead
else if Method = 'DELETE' then { do not localize }
FMethodType := mtDelete
else if Method = 'PATCH' then { do not localize }
FMethodType := mtPatch;
{$ELSE !NEXTGEN}
if System.AnsiStrings.AnsiStrComp(PAnsiChar(Method), 'GET') = 0 then { do not localize }
FMethodType := mtGet
else if System.AnsiStrings.AnsiStrComp(PAnsiChar(Method), 'PUT') = 0 then { do not localize }
FMethodType := mtPut
else if System.AnsiStrings.AnsiStrComp(PAnsiChar(Method), 'POST') = 0 then { do not localize }
FMethodType := mtPost
else if System.AnsiStrings.AnsiStrComp(PAnsiChar(Method), 'HEAD') = 0 then { do not localize }
FMethodType := mtHead
else if System.AnsiStrings.AnsiStrComp(PAnsiChar(Method), 'DELETE') = 0 then { do not localize }
FMethodType := mtDelete
else if System.AnsiStrings.AnsiStrComp(PAnsiChar(Method), 'PATCH') = 0 then { do not localize }
FMethodType := mtPatch;
{$ENDIF NEXTGEN}
end;
–jeroen
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Posted in Conference Topics, Conferences, Delphi, Development, Event, Software Development | 4 Comments »
Delphi analog to C# ?? null-coalescing operator and Light Table like debugger evaluation
Posted by jpluimers on 2017/09/05
Interesting stuff:
- https://gist.github.com/lynatan/673e574faa8343fa01d7a91e75065c54 OpOverloadWithGenerics.pas which is very similar to the C# ?? null coalescing operator [WayBack]
- DLight in-line debugger evaluation which is very similar to parts from the Light Table IDE concept [WayBack] which reminds me and others of the smalltalk days [WayBack] (https://github.com/lynatan/DLight)
- RSS feed: http://feedly.com/i/subscription/feed/http://d.hatena.ne.jp/tales/rss
- Github: https://github.com/lynatan
- Gists: https://gist.github.com/lynatan
via:
- Hatena Tales 2016-10-15 [WayBack] – DLight
- Hatena Tales 2016-09-13 [WayBack] – OpOverloadWithGenerics.pas
- Wow! Very cool! An IDE Expert that displays values of watch expressions when debugging, right inside your code editor, and it’s live! – Edwin Yip – Google+ [WayBack]
- lynatan/May-the-bevel-be-with-you: Set BevelOuter property to bvLowered in compiler progress window panels.
- Restore bevels back in compiler progress dialoghttps://github.com/lynatan/May-the-bevel-be-with-you – David Berneda – Google+ [WayBack]
In more detail:
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Posted in Conference Topics, Conferences, Delphi, Development, Event, Software Development | 3 Comments »
Windows – WorldTransform on the Printer’s Canvas can be a challenge…
Posted by jpluimers on 2017/09/05
// Don't use SetWorldTransform [WayBack] on Printer.
// Some drivers don't handle it correct
// We will only use ModifyWorldTransform [WayBack]
// Let Windows and Driver do the Job
Source: Hello, I use a component that do some nice things on the Printer’s Canvas…… [WayBack]
–jeroen
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Posted in Delphi, Development, Software Development, Windows Development | 1 Comment »
Delphi code completion but more relaxed
Posted by jpluimers on 2017/08/31
From my link archive:
- shadow_cs / delphi-smart-code-completion / wiki / Home — Bitbucket via I made the Code completion more forgiving [WayBack].
- Released as BDS expert that uses Levenshtein distance to compute code completion auto-suggestions, this allows to find partial or misspelled matches.at: shadow_cs / delphi-smart-code-completion — Bitbucket
via: Some time ago I wrote about an IDE plugin I made that modifies code completion behavior to be able to find even misspelled identifiers … – Honza Rameš – Google+ [WayBack]
- Released as BDS expert that uses Levenshtein distance to compute code completion auto-suggestions, this allows to find partial or misspelled matches.at: shadow_cs / delphi-smart-code-completion — Bitbucket
- http://www.devjetsoftware.com/downloads/ (CodeInsightPlus [WayBack]) which works very well
Both via I remember someone in this group showed a prototype of a ‘code-completion’ replacement IDE expert, which supports fuzzy matching of method names you typed [WayBack]
If I remember correctly, the Kibitz compiler started to expose less functionality around the Delphi 7 or Galileo era rendering many of the GExperts additions useless. Not sure about the current state of that now.
–jeroen
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Posted in Delphi, Development, Software Development | 2 Comments »
The Wiert Corner - irregular stream of stuff 