Re: [fpc-devel] TBytes
On 02/28/2012 07:29 AM, Martin Schreiber wrote: Because of Delphi compatibility and code cleanness. I see: The "Unicode Threat" that makes "String" a moving target, forcing the poor "String" type to be "visible Text" i.e. holding a (somehow) known encoding of its binary content. Of course I do see both aspects: GUI programmers will hope that "strings" are just printable and thus the name of the "somehow encoded" type should stay "String", while technically, a String is just a decently managed sequence of "something". Thus to me it's clear that a decent compiler should provide both: one or more types for appropriately encoded text and one or more types for sequences of binary objects. that both should be easily usable and provide fast operation as similar as possible to the legacy String handling. Often we need to combine buffer data from binary pieces and character data/strings. Obviously. So why not define decent types like "ByteString", "WordString", "DWordString", (maybe CharString, PointerString or whatever, too) allowing for the legacy string operations in an appropriately overloaded way ? -Michael ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
Re: [fpc-devel] TBytes
Am 28.02.2012 08:06, schrieb Michael Schnell:
On 02/28/2012 05:04 AM, Martin Schreiber wrote:
I read that we should use TBytes instead of AnsiString in order to
implement combined binary/character buffers with automatic memory
management.
Why ?
Because of Delphi compatibility and code cleanness.
To me ("Ansi"-) strings seem a lot more convenient in many cases (e.g.
when implementing a kind of protocol on a Byte Stream.
Me too. :-)
Often we need to combine buffer data from binary pieces and character
data/strings.
Martin
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Re: [fpc-devel] TBytes
On 02/28/2012 05:04 AM, Martin Schreiber wrote:
I read that we should use TBytes instead of AnsiString in order to
implement combined binary/character buffers with automatic memory
management.
Why ?
To me ("Ansi"-) strings seem a lot more convenient in many cases (e.g.
when implementing a kind of protocol on a Byte Stream.
-Michael
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[fpc-devel] TBytes
Hi, I read that we should use TBytes instead of AnsiString in order to implement combined binary/character buffers with automatic memory management. With AnsiString we used setlength() in order to allocate not initialized memory. TBytes is defined as " TBytes = array of Byte; " where setlength() fills the buffer with zeros. What should we use instead? Thanks, Martin ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
Re: [fpc-devel] global property, with getter in other unit
On 28/02/2012 00:46, Paul Ishenin wrote: 28.02.2012 3:01, Martin пишет: Defining a property in the interface section (outside a class), that refers to methods in another unit, gives an *unexpected* error. It may well be not allowed and then should give an error, but the right error in the right place. Btw, only tested with 2.4.4, apologies if that is fixed in 2.6.0 verified with 2.6 too property Foo: TObject read FunctionFromOtherUnit; // OtherUnit is in uses The compiler passes that line without error. But when trying to read the property UnitFoo.pas(999,3) Error: Wrong number of parameters specified for call to "FunctionFromOtherUnit" Can you submit a more complete example? Attached. It needed 3 units, accessing Foo in the same unit, in which it is declared (unit2) compiles (not tested if it runs...) New Folder.rar Description: Binary data ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
Re: [fpc-devel] global property, with getter in other unit
28.02.2012 3:01, Martin пишет: Defining a property in the interface section (outside a class), that refers to methods in another unit, gives an *unexpected* error. It may well be not allowed and then should give an error, but the right error in the right place. Btw, only tested with 2.4.4, apologies if that is fixed in 2.6.0 A none existing function, reports an immediate error, on the line where the property is declared: property Foo: TObject read NoneExistingFunction; But property Foo: TObject read FunctionFromOtherUnit; // OtherUnit is in uses The compiler passes that line without error. But when trying to read the property UnitFoo.pas(999,3) Error: Wrong number of parameters specified for call to "FunctionFromOtherUnit" Can you submit a more complete example? Best regards, Paul Ishenin ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
[fpc-devel] global property, with getter in other unit
Defining a property in the interface section (outside a class), that refers to methods in another unit, gives an *unexpected* error. It may well be not allowed and then should give an error, but the right error in the right place. Btw, only tested with 2.4.4, apologies if that is fixed in 2.6.0 A none existing function, reports an immediate error, on the line where the property is declared: property Foo: TObject read NoneExistingFunction; But property Foo: TObject read FunctionFromOtherUnit; // OtherUnit is in uses The compiler passes that line without error. But when trying to read the property UnitFoo.pas(999,3) Error: Wrong number of parameters specified for call to "FunctionFromOtherUnit" ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
Re: [fpc-devel] TMSSQLConnection - sqlDB component for accessing MS SQL Server
On Mon, Feb 27, 2012 at 5:08 AM, wrote: > > > On Mon, 27 Feb 2012, LacaK wrote: > >> Hi, >> let me share same basic info/ideas about TMSSQLConnection : >> 1. As Marcos wrote it is descendant of sql-db TSQLConnection class and >> provides native connector for MS SQL Servers and Sybase servers >> 2. is depends/requires on FreeTDS open-source cross platform DB-Library >> (alternatively can be used also Microsoft db-library ntwdblib.dll) >> 3. all what is needed are 2-3 files: >> - mssqlconn.pp (implementation of TMSSQLConnection and TSybaseConnection) >> - dblib.pp (interface to FreeTDS db-library ABI dblib.dll on Windows, >> libsybdb.so on *NIX) >> - readme.txt (some info for users/developers) >> 4. according to market share of MS SQL Server and Sybase there may be many >> users, which will welcome alternative to TODBCConnection >> 5. there is on http://www.freepascal.org/future.var in "Improve the >> database support" > "Drivers (descendants) for more database types" so I >> understand it as FPC is open for new stuff ;-) >> 6. if there is any problem please let us know. If you decide to include it >> into fcl-db then you can place files for example into src/sqldb/mssql folder >> ;-) > > > I will have a look and include both units. And the dream will become true... Thanks Michael. Any chance to merge in fixes_2_6 in short time? Marcos Douglas ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
Re: [fpc-devel] TMSSQLConnection - sqlDB component for accessing MS SQL Server
On Mon, 27 Feb 2012, LacaK wrote: Hi, let me share same basic info/ideas about TMSSQLConnection : 1. As Marcos wrote it is descendant of sql-db TSQLConnection class and provides native connector for MS SQL Servers and Sybase servers 2. is depends/requires on FreeTDS open-source cross platform DB-Library (alternatively can be used also Microsoft db-library ntwdblib.dll) 3. all what is needed are 2-3 files: - mssqlconn.pp (implementation of TMSSQLConnection and TSybaseConnection) - dblib.pp (interface to FreeTDS db-library ABI dblib.dll on Windows, libsybdb.so on *NIX) - readme.txt (some info for users/developers) 4. according to market share of MS SQL Server and Sybase there may be many users, which will welcome alternative to TODBCConnection 5. there is on http://www.freepascal.org/future.var in "Improve the database support" > "Drivers (descendants) for more database types" so I understand it as FPC is open for new stuff ;-) 6. if there is any problem please let us know. If you decide to include it into fcl-db then you can place files for example into src/sqldb/mssql folder ;-) I will have a look and include both units. Michael. ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
Re: [fpc-devel] TMSSQLConnection - sqlDB component for accessing MS SQL Server
Hi, let me share same basic info/ideas about TMSSQLConnection : 1. As Marcos wrote it is descendant of sql-db TSQLConnection class and provides native connector for MS SQL Servers and Sybase servers 2. is depends/requires on FreeTDS open-source cross platform DB-Library (alternatively can be used also Microsoft db-library ntwdblib.dll) 3. all what is needed are 2-3 files: - mssqlconn.pp (implementation of TMSSQLConnection and TSybaseConnection) - dblib.pp (interface to FreeTDS db-library ABI dblib.dll on Windows, libsybdb.so on *NIX) - readme.txt (some info for users/developers) 4. according to market share of MS SQL Server and Sybase there may be many users, which will welcome alternative to TODBCConnection 5. there is on http://www.freepascal.org/future.var in "Improve the database support" > "Drivers (descendants) for more database types" so I understand it as FPC is open for new stuff ;-) 6. if there is any problem please let us know. If you decide to include it into fcl-db then you can place files for example into src/sqldb/mssql folder ;-) TIA -Laco. Hi, As you can see here http://bugs.freepascal.org/view.php?id=17303 the developer known to LacaK developed a new connector for MSSQLServer, descendant of TSQLConnection class, and sent the beta code in 2010-08-30. Some developers discussed the new code here: http://lazarus.freepascal.org/index.php/topic,15135.msg80922.html#msg80922 I'm already using this connector in production without problems. To FPC core team: Could you take a look in that component and think about included this code in SVN to new developers use too, please? Thanks, Marcos Douglas PS: this message was posted in lazarus-list and fpc-pascal, but I was wrong because nobody answer me about YES or NOT. So, I think this is the right list, don't? ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
